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import of llt library source

This commit is contained in:
JeffBezanson 2008-07-01 01:53:51 +00:00
commit 1f81d56b89
39 changed files with 8731 additions and 0 deletions
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44
llt/Makefile Normal file
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CC = gcc
SRCS = bitvector.c hashing.c socket.c timefuncs.c utils.c dblprint.c ptrhash.c \
utf8.c ios.c operators.c cplxprint.c dirpath.c
OBJS = $(SRCS:%.c=%.o)
DOBJS = $(SRCS:%.c=%.do)
TARGET = libllt.a
TESTSRC = unittest.c
TESTER = llttest
FLAGS = -Wall -Wextra -Wno-strict-aliasing $(CFLAGS)
LIBS =
DEBUGFLAGS = -g -DDEBUG $(FLAGS)
SHIPFLAGS = -O2 -DNDEBUG $(FLAGS)
default: release
%.o: %.c
$(CC) $(SHIPFLAGS) -c $< -o $@
%.do: %.c
$(CC) $(DEBUGFLAGS) -c $< -o $@
debug: $(DOBJS)
rm -rf $(TARGET)
ar rs $(TARGET) $(DOBJS)
release: $(OBJS)
rm -rf $(TARGET)
ar rs $(TARGET) $(OBJS)
test:
make clean
make release CFLAGS=-DENABLE_LLT_TEST
gcc $(TESTSRC) $(TARGET) -o $(TESTER) -lm
./$(TESTER)
clean:
rm -f *.o
rm -f *.do
rm -f *~
rm -f core*
rm -f $(TARGET)
rm -f $(TESTER)

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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include <limits.h>
#include <errno.h>
#ifdef WIN32
#include <malloc.h>
#include <io.h>
#include <fcntl.h>
#define fileno _fileno
#else
#include <unistd.h>
#include <sys/time.h>
#include <sys/select.h>
#endif
#include "dtypes.h"
#include "utils.h"
#include "utf8.h"
#include "ios.h"
#include "socket.h"
/* OS-level primitive wrappers */
// return error code, #bytes read in *nread
static int _os_read(long fd, void *buf, size_t n, size_t *nread)
{
ssize_t r = read((int)fd, buf, n);
if (r == -1) {
*nread = 0;
return errno;
}
*nread = (size_t)r;
return 0;
}
static int _os_write(long fd, void *buf, size_t n, size_t *nwritten)
{
ssize_t r = write((int)fd, buf, n);
if (r == -1) {
*nwritten = 0;
return errno;
}
*nread = (size_t)r;
return 0;
}
static int _fd_available(long fd)
{
#ifndef WIN32
fd_set set;
struct timeval tv = {0, 0};
FD_ZERO(&set);
FD_SET(fd, &set);
return (select(fd+1, &set, NULL, NULL, &tv)!=0);
#else
return 0;
#endif
}
/* internal utility functions */
static char *_buf_realloc(ios_t *s, size_t sz)
{
char *temp;
if (sz <= s->maxsize)
return s->buf;
if ((s->buf==NULL || s->buf==&s->local[0]) && (sz <= IOS_INLSIZE)) {
/* TODO: if we want to allow shrinking, see if the buffer shrank
down to this size, in which case we need to copy. */
s->buf = &s->local[0];
s->maxsize = IOS_INLSIZE;
s->ownbuf = 1;
return s->buf;
}
else if (s->ownbuf && s->buf != &s->local[0]) {
// if we own the buffer we're free to resize it
// always allocate 1 bigger in case user wants to add a NUL
// terminator after taking over the buffer
temp = realloc(s->buf, sz+1);
if (temp == NULL)
return NULL;
}
else {
temp = malloc(sz+1);
s->ownbuf = 1;
if (temp == NULL)
return NULL;
}
if (s->buf != temp && s->size > 0)
memcpy(temp, s->buf, s->size);
s->buf = temp;
s->maxsize = sz;
return s->buf;
}
// write a block of data into the buffer at the current position, resizing
// if necessary. returns # written.
static size_t _writebuf_force(ios_t *s, char *data, size_t n)
{
size_t amt;
size_t newsize;
if (n == 0)
return 0;
if (s->bpos + n > s->size) {
if (s->bpos + n > s->maxsize) {
/* TO DO: here you might want to add a mechanism for limiting
the growth of the stream. */
newsize = s->maxsize * 2;
while (s->bpos + n > newsize)
newsize *= 2;
if (_buf_realloc(s, newsize) == NULL) {
/* no more space; write as much as we can */
amt = s->maxsize - s->bpos;
if (amt > 0) {
memcpy(&s->buf[s->bpos], data, amt);
}
s->bpos += amt;
s->size = s->maxsize;
return amt;
}
}
s->size = s->bpos + n;
}
memcpy(&s->buf[s->bpos], data, n);
s->bpos += n;
return n;
}
/* interface functions, low level */
size_t ios_read(ios_t *s, char *dest, size_t n)
{
}
size_t ios_write(ios_t *s, char *data, size_t n)
{
}
off_t ios_seek(ios_t *s, off_t pos)
{
}
off_t ios_seek_end(ios_t *s)
{
}
off_t ios_skip(ios_t *s, off_t offs)
{
}
off_t ios_pos(ios_t *s)
{
if (s->bm == bm_mem)
return (off_t)s->bpos;
off_t fdpos = lseek(s->fd, 0, SEEK_CUR);
if (fdpos == (off_t)-1)
return fdpos;
if (s->state == iost_wr)
fdpos += s->bpos;
else if (s->state == iost_rd)
fdpos -= (s->size - s->bpos);
return fdpos;
}
size_t ios_trunc(ios_t *s, size_t size)
{
}
int ios_eof(ios_t *s)
{
if (s->bm == bm_mem)
return (s->bpos >= s->size);
if (s->fd == -1)
return 1;
// todo
}
static void _discard_partial_buffer(ios_t *s)
{
// this function preserves the invariant that data to write
// begins at the beginning of the buffer, and s->size refers
// to how much valid file data is stored in the buffer.
// this needs to be called when normal operation is interrupted in
// the middle of the buffer. "normal operation" is reading or
// writing to the end of the buffer. this happens e.g. when flushing.
if (s->bpos && s->size > s->bpos) {
memmove(s->buf, s->buf + s->bpos, s->size - s->bpos);
}
s->size -= s->bpos;
s->bpos = 0;
}
int ios_flush(ios_t *s)
{
if (ndirty == 0 || s->bm == bm_mem || s->buf == NULL)
return 0;
if (s->fd == -1)
return -1;
int partialb=0;
if (s->bitpos > 0 && s->ndirty==s->bpos+1) {
// flushing partial byte
partialb=1;
}
size_t nw, ntowrite=s->ndirty;
int err = _os_write(s->fd, s->buf, ntowrite, &nw);
// todo: try recovering from some kinds of errors (e.g. retry)
if (partialb) {
// skip back 1, since we might have to write this byte again
// if more bits in it are changed
if (lseek(s->fd, -1, SEEK_CUR) == (off_t)-1) {
// uhoh. can't write the "rest" of this byte. move to next
// byte instead.
s->bpos++;
s->bitpos = 0;
}
}
_discard_partial_buffer(s);
s->ndirty = 0;
if (err)
return err;
if (nw < ntowrite)
return -1;
return 0;
}
void ios_close(ios_t *s)
{
ios_flush(s);
if (s->fd != -1 && s->ownfd)
close(s->fd);
s->fd = -1;
}
char *ios_takebuf(ios_t *s, size_t *psize)
{
char *buf;
ios_flush(s);
if (s->buf == &s->local[0]) {
buf = malloc(s->size+1);
if (buf == NULL)
return NULL;
if (s->size)
memcpy(buf, s->buf, s->size);
buf[s->size] = '\0';
}
else {
buf = s->buf;
}
*psize = s->size+1; // buffer is actually 1 bigger for terminating NUL
/* empty stream and reinitialize */
if (s->bm == bm_mem || s->bm == bm_none) {
s->buf = &s->local[0];
s->maxsize = IOS_INLSIZE;
}
else {
s->buf = NULL;
_buf_realloc(s, IOS_BUFSIZE);
}
s->size = s->bpos = 0;
s->bitpos = 0;
return buf;
}
int ios_setbuf(ios_t *s, char *buf, size_t size, int own)
{
ios_flush(s);
size_t nvalid=0;
nvalid = s->size;
if (s->size == s->bpos && s->bitpos>0)
nvalid++;
if (size < nvalid)
nvalid = size;
memcpy(buf, s->buf, nvalid);
if (s->bpos > nvalid) {
// truncated
s->bpos = nvalid;
s->bitpos = 0;
}
s->size = nvalid;
if (s->buf!=NULL && s->ownbuf && s->buf!=&s->local[0])
free(s->buf);
s->buf = buf;
s->maxsize = size;
s->ownbuf = own;
return 0;
}
int ios_bufmode(ios_t *s, bufmode_t mode)
{
// no fd; can only do mem-only buffering
if (s->fd == -1 && mode != bm_mem)
return -1;
s->bm = mode;
return 0;
}
void ios_bswap(ios_t *s, int bswap)
{
s->byteswap = !!bswap;
}
int ios_copy(ios_t *to, ios_t *from, size_t nbytes, bool_t all)
{
}
/* stream object initializers. we do no allocation. */
ios_t *ios_file(ios_t *s, char *fname, int create, int rewrite)
{
}
ios_t *ios_mem(ios_t *s, size_t initsize)
{
}
ios_t *ios_fd(ios_t *s, long fd)
{
}
/* higher level interface */
int ios_putbit(ios_t *s, int bit)
{
byte_t mask = 1<<s->bitpos;
if (_ios_setstate(s, iost_wr))
return 0;
if (!s->dirty) {
// haven't written any bits yet
// if stenciling is turned on, the buffer is already full and
// we don't need to do anything
if (s->rereadable && !s->stenciled) {
// fill buffer if we can
}
}
if (bit)
s->buf[s->bpos] |= mask;
else
s->buf[s->bpos] &= ~mask;
s->dirty = 1;
s->bitpos++;
if (s->bitpos > 7) {
s->bitpos = 0;
s->bpos++;
s->tally++;
}
return 1;
}
int ios_getbit(ios_t *s, int *pbit)
{
byte_t mask = 1<<s->bitpos;
if (_ios_setstate(s, iost_rd))
return 0;
*pbit = (s->buf[s->bpos] & mask) ? 1 : 0;
s->bitpos++;
if (s->bitpos > 7) {
s->bitpos = 0;
s->bpos++;
s->tally++;
}
return 1;
}

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#ifndef __IOS_H_
#define __IOS_H_
// this flag controls when data actually moves out to the underlying I/O
// channel. memory streams are a special case of this where the data
// never moves out.
typedef enum { bm_none, bm_line, bm_block, bm_mem } bufmode_t;
typedef enum { iost_none, iost_rd, iost_wr } iostate_t;
#define IOS_INLSIZE 54
#define IOS_BUFSIZE 4095
typedef struct {
bufmode_t bm;
// the state only indicates where the underlying file position is relative
// to the buffer. reading: at the end. writing: at the beginning.
// in general, you can do any operation in any state.
iostate_t state;
char *buf; // start of buffer
size_t maxsize; // space allocated to buffer
size_t size; // length of valid data in buf, >=ndirty
size_t bpos; // current position in buffer
size_t ndirty; // # bytes at &buf[0] that need to be written
// this is a public field that keeps a running count of bytes
// read or written. you can freely use and change it. this is
// intended for keeping track of relative positions in streams
// that don't have absolute positions (like sockets).
size_t tally;
// pointer-size integer to support platforms where it might have
// to be a pointer
long fd;
byte_t bitpos;
//unsigned char bitdirty:1; // bit buffer needs to be written
unsigned char byteswap:1;
//unsigned char readonly:1;
unsigned char ownbuf:1;
unsigned char ownfd:1;
// this means you can read, seek back, then read the same data
// again any number of times. usually only true for files and strings.
unsigned char rereadable:1;
// this enables "stenciled writes". you can alternately write and
// seek without flushing in between. this performs read-before-write
// to populate the buffer, so "rereadable" capability is required.
// this is off by default, except for bit I/O if rereadable is true.
unsigned char stenciled:1;
// request durable writes (fsync)
// unsigned char durable:1;
// todo: mutex
char local[IOS_INLSIZE];
} ios_t;
/* low-level interface functions */
size_t ios_read(ios_t *s, char *dest, size_t n);
size_t ios_write(ios_t *s, char *data, size_t n);
off_t ios_seek(ios_t *s, off_t pos); // absolute seek
off_t ios_seek_end(ios_t *s);
off_t ios_skip(ios_t *s, off_t offs); // relative seek
off_t ios_pos(ios_t *s); // get current position
size_t ios_trunc(ios_t *s, size_t size);
int ios_eof(ios_t *s);
int ios_flush(ios_t *s);
void ios_close(ios_t *s);
char *ios_takebuf(ios_t *s, size_t *psize); // release buffer to caller
// set buffer space to use
int ios_setbuf(ios_t *s, char *buf, size_t size, int own);
int ios_bufmode(ios_t *s, bufmode_t mode);
void ios_bswap(ios_t *s, int bswap);
int ios_copy(ios_t *to, ios_t *from, size_t nbytes, bool_t all);
//void ios_lock(ios_t *s);
//int ios_trylock(ios_t *s);
//int ios_unlock(ios_t *s);
/* stream creation */
ios_t *ios_file(ios_t *s, char *fname, int create, int rewrite);
ios_t *ios_mem(ios_t *s, size_t initsize);
ios_t *ios_fd(ios_t *s, long fd);
// todo: ios_socket
/* high-level functions - output */
int ios_putnum(ios_t *s, char *data, uint32_t type);
int ios_putint(ios_t *s, int n);
int ios_pututf8(ios_t *s, uint32_t wc);
int ios_putstringz(ios_t *s, char *str, bool_t do_write_nulterm);
/* single-bit I/O - even works for mixed reads and writes.
mixing bit-level I/O with normal byte stream I/O has undefined effects and
will almost certainly destroy your file. */
int ios_putbit(ios_t *s, int bit);
int ios_printf(ios_t *s, char *format, ...);
/* high-level stream functions - input */
int ios_getnum(ios_t *s, char *data, uint32_t type);
int ios_getutf8(ios_t *s, uint32_t *pwc);
int ios_ungetutf8(ios_t *s, uint32_t wc);
int ios_getstringz(ios_t *dest, ios_t *src);
int ios_getstringn(ios_t *dest, ios_t *src, size_t nchars);
int ios_readline(ios_t *dest, ios_t *s, char delim);
int ios_getline(ios_t *s, char **pbuf, size_t *psz);
int ios_getbit(ios_t *s, int *pbit); // returns # of bits read (0 or 1)
// seek by utf8 sequence increments
int ios_nextutf8(ios_t *s);
int ios_prevutf8(ios_t *s);
/* stdio-style functions */
#define IOS_EOF (-1)
int ios_putc(ios_t *s, int c);
wint_t ios_putwc(ios_t *s, wchar_t wc);
int ios_getc(ios_t *s);
wint_t ios_getwc(ios_t *s);
int ios_ungetc(ios_t *s, int c);
wint_t ios_ungetwc(ios_t *s, wint_t wc);
#define ios_puts(s, str) ios_write(s, str, strlen(str))
/*
With memory streams, mixed reads and writes are equivalent to performing
sequences of *p++, as either an lvalue or rvalue. File streams behave
similarly, but other streams might not support this. Using unbuffered
mode makes this more predictable.
Note on "unget" functions:
There are two kinds of functions here: those that operate on sized
blocks of bytes and those that operate on logical units like "character"
or "integer". The "unget" functions only work on logical units. There
is no "unget n bytes". You can only do an unget after a matching get.
However, data pushed back by an unget is available to all read operations.
The reason for this is that unget is defined in terms of its effect on
the underlying buffer (namely, it rebuffers data as if it had been
buffered but not read yet). IOS reserves the right to perform large block
operations directly, bypassing the buffer. In such a case data was
never buffered, so "rebuffering" has no meaning (i.e. there is no
correspondence between the buffer and the physical stream).
Single-bit I/O is able to write partial bytes ONLY IF the stream supports
seeking. Also, line buffering is not well-defined in the context of
single-bit I/O, so it might not do what you expect.
implementation notes:
in order to know where we are in a file, we must ensure the buffer
is only populated from the underlying stream starting with p==buf.
to switch from writing to reading: flush, set p=buf, cnt=0
to switch from reading to writing: seek backwards cnt bytes, p=buf, cnt=0
when writing: buf starts at curr. physical stream pos, p - buf is how
many bytes we've written logically. cnt==0
dirty == (bitpos>0 && state==iost_wr), EXCEPT right after switching from
reading to writing, where we might be in the middle of a byte without
having changed it.
to write a bit: if !dirty, read up to maxsize-(p-buf) into buffer, then
seek back by the same amount (undo it). write onto those bits. now set
the dirty bit. in this state, we can bit-read up to the end of the byte,
then formally switch to the read state using flush.
design points:
- data-source independence, including memory streams
- support 64-bit and large files
- efficient, low-latency buffering
- unget
- expose buffer to user, allow user-owned buffers
- allow direct I/O, don't always go through buffer
- buffer-internal seeking. makes seeking back 1-2 bytes very fast,
and makes it possible for sockets where it otherwise wouldn't be
- special support for utf8
- single-bit I/O
- tries to allow switching between reading and writing
- type-aware functions with byte-order swapping service
- position counter for meaningful data offsets with sockets
note:
the current code needs to be mostly rewritten. the design should be
as follows:
the buffer is a view of part of a file/stream. you can seek, read, and
write around in it as much as you like, as if it were just a string.
we keep track of the part of the buffer that's invalid (written to).
we remember whether the position of the underlying stream is aligned
with the end of the buffer (reading mode) or the beginning (writing mode).
based on this info, we might have to seek back before doing a flush.
as optimizations, we do no writing if the buffer isn't "dirty", and we
do no reading if the data will only be overwritten.
*/
#endif

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#ifndef __STREAMS_H_
#define __STREAMS_H_
struct _stream;
// numeric type codes
#define T_BOOL 0x000
#define T_BYTE 0x001
#define T_SHORT 0x002
#define T_INT 0x003
#define T_FLOAT 0x004
#define T_DOUBLE 0x005
#define T_INT64 0x006
//#define T_LDOUBLE 0x007
#define T_UNSIGNED 0x008
#define T_CPLX 0x010
#define T_TYPEMASK 0x1f /* bits related to numeric type */
#define T_TYPESIZE 0x07 /* bits related to type size */
#define is_type(a, t) (((a) & T_TYPESIZE) == (t))
// type_bitseq tells whether 2 types are bit-representation compatible
#define type_bitseq(a, b) (((a) & ~T_UNSIGNED) == ((b) & ~T_UNSIGNED))
extern unsigned int type_sizes[];
typedef struct {
void (*free_func)(struct _stream *s);
/* these return -1 on error, or new position if successful */
/* set absolute position */
off_t (*seek)(struct _stream *s, off_t where);
/* seek to end (past last byte) */
off_t (*seek_end)(struct _stream *s);
/* move relative to current position */
off_t (*skip)(struct _stream *s, off_t offs);
/* these return # of bytes read/written, 0 on error */
size_t (*read)(struct _stream *s, char *dest, size_t size);
size_t (*write)(struct _stream *s, char *data, size_t size);
/* truncate a stream to the given length */
size_t (*trunc)(struct _stream *s, size_t size);
/* no data left? */
bool_t (*eof)(struct _stream *s);
/* sync bit buffer, and sync to hardware if applicable */
void (*flush)(struct _stream *s);
/* could add fsync() call for durable writes */
} stream_interface_t;
extern stream_interface_t fs_funcs;
extern stream_interface_t ms_funcs;
extern stream_interface_t ps_funcs;
#define is_memstream(s) (((stream_t*)s)->funcs==&ms_funcs)
#define is_filestream(s) (((stream_t*)s)->funcs==&fs_funcs)
#define is_pipestream(s) (((stream_t*)s)->funcs==&ps_funcs)
/* general i/o chunk size */
#define CHUNK_SIZE 4096
/* this should be a multiple of 4; otherwise the struct gets padded to
the next multiple of 4 anyway, wasting space */
#define N_STREAM_LOCAL 40
typedef struct _stream {
/* unfortunately, it seems that pos needs to be a signed type to be
compatible with OS functions. */
off_t pos;
byte_t bitpos; /* offset within a byte, for writing individual bits */
byte_t bitbuf; /* a copy of the byte at the current stream position */
char ungotc;
struct {
/* does bit buffer need to be written? */
unsigned char dirty:1;
unsigned char byteswap:1;
unsigned char readonly:1;
unsigned char ungot:1;
};
stream_interface_t *funcs;
/* stream-specific data */
union {
char *name;
size_t maxsize;
int rd; // pipe read descriptor
};
union {
FILE *fptr;
char *data;
char *s;
int wd; // pipe write descriptor
};
union {
/* this is always a size in BYTES */
size_t size;
size_t len;
};
char local[N_STREAM_LOCAL];
} stream_t;
#include <stdio.h>
stream_t *filestream_new(stream_t *s, char *fName,
bool_t create, bool_t rewrite);
stream_t *memstream_new(stream_t *s, size_t initsize);
stream_t *pipestream_new(stream_t *s, int flags);
stream_t *stream_fromfile(stream_t *s, FILE *f, char *name);
//string_t *string_new(int len);
//string_t *string_fromc(char *s);
stream_t *memstream_copy(stream_t *s);
void stream_free(stream_t *s);
void stream_flush(stream_t *s);
/* high level stream functions */
/* 'all' means copy to end of stream */
int stream_copy(stream_t *to, stream_t *from, size_t nbytes, bool_t all);
int stream_put_num(stream_t *s, char *data, u_int32_t type);
int stream_put_int(stream_t *s, int n);
int stream_put_char(stream_t *s, u_int32_t wc);
int stream_put_stringz(stream_t *s, char *str, bool_t nulterm);
/* single-bit I/O - even works for mixed reads and writes.
mixing bit-level I/O with normal byte stream I/O has undefined effects and
will almost certainly destroy your file. however, it is safe to switch
between bit and byte I/O if you call stream_flush in between. */
void stream_put_bit(stream_t *s, int bit);
/* warning: this uses a fixed-size buffer. it is intended only for printing
normal things like "a= %d". if you might be printing a large buffer, you
should use stream i/o functions directly. */
int stream_printf(stream_t *s, char *format, ...);
/* high level stream functions - input */
int stream_get_num(stream_t *s, char *data, u_int32_t type);
int stream_get_char(stream_t *s, u_int32_t *pwc);
int stream_get_stringz(stream_t *dest, stream_t *src);
int stream_get_stringn(stream_t *dest, stream_t *src, size_t c);
int stream_readline(stream_t *dest, stream_t *s, char delim);
int stream_getline(stream_t *s, char **pbuf, size_t *psz);
/* returns # of bits read (0 or 1) */
int stream_get_bit(stream_t *s, int *pbit);
int stream_nextchar(stream_t *s);
int stream_prevchar(stream_t *s);
void stream_close(stream_t *s);
/* TODO */
// stream_fgetc
// stream_ungetc
/* get underlying file descriptors, -1 if none */
int stream_readfd(stream_t *s);
int stream_writefd(stream_t *s);
/*
low level stream functions
Streams are intended to provide a uniform function interface to various
kinds of byte streams.
The eight low-level stream functions (below) are intended to be light weight.
It must be easy to implement reasonably efficient higher-level stream
functions, therefore any complexity required to make (for example) single
byte reads and writes efficient must be implemented by the stream.
Note that you can implement file streams using fread(), fwrite(), etc.
because buffering is already implemented in every standard C library. These
calls do not make system calls in general, and are perfectly fine to use.
*/
#define stream_seek(s, w) (s)->funcs->seek(s, w)
#define stream_seek_end(s) (s)->funcs->seek_end(s)
#define stream_skip(s, o) (s)->funcs->skip(s, o)
#define stream_read(s, d, sz) (s)->funcs->read(s, (char*)d, sz)
#define stream_write(s, d, sz) (s)->funcs->write(s, (char*)d, sz)
#define stream_trunc(s, sz) (s)->funcs->trunc(s, sz)
#define stream_eof(s) (s)->funcs->eof(s)
STATIC_INLINE size_t stream_put_byte(stream_t *s, byte_t b)
{
return stream_write(s, (char*)&b, 1);
}
STATIC_INLINE size_t stream_get_byte(stream_t *s, byte_t *pb)
{
return stream_read(s, (char*)pb, 1);
}
#define stream_puts(s, str) stream_write(s, str, strlen(str))
/*
stream_take_buffer
This lets you get the data of a stream without having to copy it. In order
not to either lose the buffer or free it twice, this operation effectively
empties the stream. In other words, size goes to 0, data becomes NULL.
Whoever called the function takes full responsibility for the buffer.
You must free it eventually.
"size" gets set to the size of the data in the buffer.
*/
char *stream_take_buffer(stream_t *s, size_t *size);
#endif

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/* moving data in small power-of-2 sized units */
void copy_el(char *dest, char *src, size_t sz)
{
switch (sz) {
case 16:
*(int64_t*)&dest[0] = *(int64_t*)&src[0];
*(int64_t*)&dest[8] = *(int64_t*)&src[8];
break;
case 8: *(int64_t*)dest = *(int64_t*)src; break;
case 4: *(int32_t*)dest = *(int32_t*)src; break;
case 2: *(int16_t*)dest = *(int16_t*)src; break;
case 1: *dest = *src; break;
}
}
void swap_el(char *a, char *b, size_t sz)
{
int64_t i64;
int32_t i32;
int16_t i16;
int8_t i8;
switch (sz) {
case 16:
i64 = *(int64_t*)&a[0];
*(int64_t*)&a[0] = *(int64_t*)&b[0];
*(int64_t*)&b[0] = i64;
i64 = *(int64_t*)&a[8];
*(int64_t*)&a[8] = *(int64_t*)&b[8];
*(int64_t*)&b[8] = i64;
break;
case 8:
i64 = *(int64_t*)a;
*(int64_t*)a = *(int64_t*)b;
*(int64_t*)b = i64;
break;
case 4:
i32 = *(int32_t*)a;
*(int32_t*)a = *(int32_t*)b;
*(int32_t*)b = i32;
break;
case 2:
i16 = *(int16_t*)a;
*(int16_t*)a = *(int16_t*)b;
*(int16_t*)b = i16;
break;
case 1:
i8 = *a;
*a = *b;
*b = i8;
break;
}
}
void neg_any(void *dest, void *a, numerictype_t tag)
{
switch (tag) {
case T_INT8: *(int8_t *)dest = -*(int8_t *)a; break;
case T_UINT8: *(uint8_t *)dest = -*(uint8_t *)a; break;
case T_INT16: *(int16_t *)dest = -*(int16_t *)a; break;
case T_UINT16: *(uint16_t*)dest = -*(uint16_t*)a; break;
case T_INT32: *(int32_t *)dest = -*(int32_t *)a; break;
case T_UINT32: *(uint32_t*)dest = -*(uint32_t*)a; break;
case T_INT64: *(int64_t *)dest = -*(int64_t *)a; break;
case T_UINT64: *(uint64_t*)dest = -*(uint64_t*)a; break;
case T_FLOAT: *(float *)dest = -*(float *)a; break;
case T_DOUBLE: *(double *)dest = -*(double *)a; break;
}
}

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/*
bit vector primitives
todo:
* reverse
* nreverse
(- rotate left/right)
* shl_to
* not
- shr_row, shl_row
These routines are the back end supporting bit matrices. Many operations
on bit matrices are slow (such as accessing or setting a single element!)
but certain operations are privileged and lend themselves to extremely
efficient implementation due to the bit-vector nature of machine integers.
These are:
done:
& | $ ~ copy reverse fill sum prod
todo:
shift trans rowswap
would be nice:
channel interleave
Important note:
Out-of-place functions always assume dest and source have the same amount
of space available.
shr_to, shl_to, not_to, and reverse_to assume source and dest don't overlap
and_to, or_to, and xor_to allow overlap.
*/
#include <stdlib.h>
#include <assert.h>
#include <string.h>
#include "dtypes.h"
#include "bitvector.h"
#ifdef WIN32
#include <malloc.h>
#define alloca _alloca
#endif
// greater than this # of words we use malloc instead of alloca
#define MALLOC_CUTOFF 2000
u_int32_t *bitvector_resize(u_int32_t *b, size_t n, int initzero)
{
u_int32_t *p;
size_t sz = ((n+31)>>5) * 4;
p = realloc(b, sz);
if (p == NULL) return NULL;
if (initzero) memset(p, 0, sz);
return p;
}
u_int32_t *bitvector_new(size_t n, int initzero)
{
return bitvector_resize(NULL, n, initzero);
}
void bitvector_set(u_int32_t *b, u_int32_t n, u_int32_t c)
{
if (c)
b[n>>5] |= (1<<(n&31));
else
b[n>>5] &= ~(1<<(n&31));
}
u_int32_t bitvector_get(u_int32_t *b, u_int32_t n)
{
return b[n>>5] & (1<<(n&31));
}
u_int32_t bitreverse(u_int32_t x)
{
u_int32_t m;
#ifdef __INTEL_COMPILER
x = _bswap(x);
#else
x = (x >> 16) | (x << 16); m = 0xff00ff00;
x = ((x & m) >> 8) | ((x & ~m) << 8);
#endif
m = 0xf0f0f0f0;
x = ((x & m) >> 4) | ((x & ~m) << 4); m = 0xcccccccc;
x = ((x & m) >> 2) | ((x & ~m) << 2); m = 0xaaaaaaaa;
x = ((x & m) >> 1) | ((x & ~m) << 1);
return x;
}
// shift all bits in a long bit vector
// n is # of int32s to consider, s is shift distance
// lowest bit-index is bit 0 of word 0
// TODO: handle boundary case of shift distance >= data size?
void bitvector_shr(u_int32_t *b, size_t n, u_int32_t s)
{
u_int32_t i;
if (s == 0 || n == 0) return;
i = (s>>5);
if (i) {
n -= i;
memmove(b, &b[i], n*4);
memset(&b[n], 0, i*4);
s &= 31;
}
for(i=0; i < n-1; i++) {
b[i] = (b[i]>>s) | (b[i+1]<<(32-s));
}
b[i]>>=s;
}
// out-of-place version, good for re-aligning a strided submatrix to
// linear representation when a copy is needed
// assumes that dest has the same amount of space as source, even if it
// wouldn't have been necessary to hold the shifted bits
void bitvector_shr_to(u_int32_t *dest, u_int32_t *b, size_t n, u_int32_t s)
{
u_int32_t i, j;
if (n == 0) return;
if (s == 0) {
memcpy(dest, b, n*4);
return;
}
j = (s>>5);
if (j) {
n -= j;
memset(&dest[n], 0, j*4);
s &= 31;
b = &b[j];
}
for(i=0; i < n-1; i++) {
dest[i] = (b[i]>>s) | (b[i+1]<<(32-s));
}
dest[i] = b[i]>>s;
}
void bitvector_shl(u_int32_t *b, size_t n, u_int32_t s)
{
u_int32_t i, scrap=0, temp;
if (s == 0 || n == 0) return;
i = (s>>5);
if (i) {
n -= i;
memmove(&b[i], b, n*4);
memset(b, 0, i*4);
s &= 31;
b = &b[i];
}
for(i=0; i < n; i++) {
temp = (b[i]<<s) | scrap;
scrap = b[i]>>(32-s);
b[i] = temp;
}
}
// if dest has more space than source, set scrap to true to keep the
// top bits that would otherwise be shifted out
void bitvector_shl_to(u_int32_t *dest, u_int32_t *b, size_t n, u_int32_t s,
bool_t scrap)
{
u_int32_t i, j, sc=0;
if (n == 0) return;
if (s == 0) {
memcpy(dest, b, n*4);
return;
}
j = (s>>5);
if (j) {
n -= j;
memset(dest, 0, j*4);
s &= 31;
dest = &dest[j];
}
for(i=0; i < n; i++) {
dest[i] = (b[i]<<s) | sc;
sc = b[i]>>(32-s);
}
if (scrap)
dest[i] = sc;
}
// set nbits to c, starting at given bit offset
// assumes offs < 32
void bitvector_fill(u_int32_t *b, u_int32_t offs, u_int32_t c, u_int32_t nbits)
{
index_t i;
u_int32_t nw, tail;
u_int32_t mask;
if (nbits == 0) return;
nw = (offs+nbits+31)>>5;
if (nw == 1) {
mask = (lomask(nbits)<<offs);
if (c) b[0]|=mask; else b[0]&=(~mask);
return;
}
mask = lomask(offs);
if (c) b[0]|=(~mask); else b[0]&=mask;
if (c) mask=ONES32; else mask = 0;
for(i=1; i < nw-1; i++)
b[i] = mask;
tail = (offs+nbits)&31;
if (tail==0) {
b[i] = mask;
}
else {
mask = lomask(tail);
if (c) b[i]|=mask; else b[i]&=(~mask);
}
}
void bitvector_not(u_int32_t *b, u_int32_t offs, u_int32_t nbits)
{
index_t i;
u_int32_t nw, tail;
u_int32_t mask;
if (nbits == 0) return;
nw = (offs+nbits+31)>>5;
if (nw == 1) {
mask = (lomask(nbits)<<offs);
b[0] ^= mask;
return;
}
mask = ~lomask(offs);
b[0]^=mask;
for(i=1; i < nw-1; i++)
b[i] = ~b[i];
tail = (offs+nbits)&31;
if (tail==0) {
b[i] = ~b[i];
}
else {
mask = lomask(tail);
b[i]^=mask;
}
}
// constant-space bit vector copy in a single pass, with arbitrary
// offsets and lengths. to get this right, there are 16 cases to handle!
#define BITVECTOR_COPY_OP(name, OP) \
void bitvector_##name(u_int32_t *dest, u_int32_t doffs, \
u_int32_t *src, u_int32_t soffs, u_int32_t nbits) \
{ \
index_t i; \
u_int32_t s, nw, tail, snw; \
u_int32_t mask, scrap; \
\
if (nbits == 0) return; \
nw = (doffs+nbits+31)>>5; \
\
if (soffs == doffs) { \
if (nw == 1) { \
mask = (lomask(nbits)<<doffs); \
dest[0] = (dest[0] & ~mask) | (OP(src[0]) & mask); \
return; \
} \
mask = ~lomask(doffs); \
dest[0] = (dest[0] & ~mask) | (OP(src[0]) & mask); \
for(i=1; i < nw-1; i++) \
dest[i] = OP(src[i]); \
tail = (doffs+nbits)&31; \
if (tail==0) { dest[i]=src[i]; } else { \
mask = lomask(tail); \
dest[i] = (dest[i] & ~mask) | (OP(src[i]) & mask); } \
return; \
} \
snw = (soffs+nbits+31)>>5; \
if (soffs < doffs) { \
s = doffs-soffs; \
if (nw == 1) { \
mask = (lomask(nbits)<<doffs); \
dest[0] = (dest[0] & ~mask) | ((OP(src[0])<<s) & mask); \
return; \
} \
mask = ~lomask(doffs); \
dest[0] = (dest[0] & ~mask) | ((OP(src[0])<<s) & mask); \
scrap = OP(src[0])>>(32-s); \
for(i=1; i < snw-1; i++) { \
dest[i] = (OP(src[i])<<s) | scrap; \
scrap = OP(src[i])>>(32-s); \
} \
tail = (doffs+nbits)&31; \
if (tail==0) { mask=ONES32; } else { mask = lomask(tail); } \
if (snw == nw) { \
dest[i] = (dest[i] & ~mask) | (((OP(src[i])<<s)|scrap) & mask); \
} \
else /* snw < nw */ { \
if (snw == 1) { \
dest[i] = (dest[i] & ~mask) | \
(((OP(src[i])<<s) | scrap) & mask); \
} \
else { \
dest[i] = (OP(src[i])<<s) | scrap; \
scrap = OP(src[i])>>(32-s); \
i++; \
dest[i] = (dest[i] & ~mask) | (scrap & mask); \
} \
} \
} \
else { \
s = soffs-doffs; \
if (snw == 1) { \
mask = (lomask(nbits)<<doffs); \
dest[0] = (dest[0] & ~mask) | ((OP(src[0])>>s) & mask); \
return; \
} \
if (nw == 1) { \
mask = (lomask(nbits)<<doffs); \
dest[0] = (dest[0] & ~mask) | \
(((OP(src[0])>>s)|(OP(src[1])<<(32-s))) & mask); \
return; \
} \
mask = ~lomask(doffs); \
dest[0] = (dest[0] & ~mask) | \
(((OP(src[0])>>s)|(OP(src[1])<<(32-s))) & mask); \
for(i=1; i < nw-1; i++) { \
dest[i] = (OP(src[i])>>s) | (OP(src[i+1])<<(32-s)); \
} \
tail = (doffs+nbits)&31; \
if (tail==0) { mask=ONES32; } else { mask = lomask(tail); } \
if (snw == nw) { \
dest[i] = (dest[i] & ~mask) | ((OP(src[i])>>s) & mask); \
} \
else /* snw > nw */ { \
dest[i] = (dest[i] & ~mask) | \
(((OP(src[i])>>s)|(OP(src[i+1])<<(32-s))) & mask); \
} \
} \
}
#define BV_COPY(a) (a)
#define BV_NOT(a) (~(a))
BITVECTOR_COPY_OP(copy, BV_COPY)
BITVECTOR_COPY_OP(not_to, BV_NOT)
// right-shift the bits in one logical "row" of a long 2d bit vector
/*
void bitvector_shr_row(u_int32_t *b, u_int32_t offs, size_t nbits, u_int32_t s)
{
}
*/
// copy from source to dest while reversing bit-order
// assumes dest offset == 0
// assumes source and dest don't overlap
// assumes offset < 32
void bitvector_reverse_to(u_int32_t *dest, u_int32_t *src, u_int32_t soffs,
u_int32_t nbits)
{
index_t i;
u_int32_t nw, tail;
if (nbits == 0) return;
nw = (soffs+nbits+31)>>5;
// first, reverse the words while reversing bit order within each word
for(i=0; i < nw/2; i++) {
dest[i] = bitreverse(src[nw-i-1]);
dest[nw-i-1] = bitreverse(src[i]);
}
if (nw&0x1)
dest[i] = bitreverse(src[i]);
tail = (soffs+nbits)&31;
if (tail)
bitvector_shr(dest, nw, 32-tail);
}
void bitvector_reverse(u_int32_t *b, u_int32_t offs, u_int32_t nbits)
{
index_t i;
u_int32_t nw, tail;
u_int32_t *temp;
if (nbits == 0) return;
nw = (offs+nbits+31)>>5;
temp = (nw > MALLOC_CUTOFF) ? malloc(nw*4) : alloca(nw*4);
for(i=0; i < nw/2; i++) {
temp[i] = bitreverse(b[nw-i-1]);
temp[nw-i-1] = bitreverse(b[i]);
}
if (nw&0x1)
temp[i] = bitreverse(b[i]);
tail = (offs+nbits)&31;
bitvector_copy(b, offs, temp, (32-tail)&31, nbits);
if (nw > MALLOC_CUTOFF) free(temp);
}
u_int32_t bitvector_count(u_int32_t *b, u_int32_t offs, u_int32_t nbits)
{
index_t i;
u_int32_t nw, tail;
u_int32_t ans;
if (nbits == 0) return 0;
nw = (offs+nbits+31)>>5;
if (nw == 1) {
return count_bits(b[0] & (lomask(nbits)<<offs));
}
ans = count_bits(b[0]>>offs); // first end cap
for(i=1; i < nw-1; i++) {
/* popcnt can be computed branch-free, so these special cases
probably don't help much */
/*
v = b[i];
if (v == 0)
continue;
if (v == ONES32)
ans += 32;
else
*/
ans += count_bits(b[i]);
}
tail = (offs+nbits)&31;
ans += count_bits(b[i]&(tail>0?lomask(tail):ONES32)); // last end cap
return ans;
}
u_int32_t bitvector_any0(u_int32_t *b, u_int32_t offs, u_int32_t nbits)
{
index_t i;
u_int32_t nw, tail;
u_int32_t mask;
if (nbits == 0) return 0;
nw = (offs+nbits+31)>>5;
if (nw == 1) {
mask = (lomask(nbits)<<offs);
if ((b[0] & mask) != mask) return 1;
return 0;
}
mask = ~lomask(offs);
if ((b[0] & mask) != mask) return 1;
for(i=1; i < nw-1; i++) {
if (b[i] != ONES32) return 1;
}
tail = (offs+nbits)&31;
if (tail==0) {
if (b[i] != ONES32) return 1;
}
else {
mask = lomask(tail);
if ((b[i] & mask) != mask) return 1;
}
return 0;
}
u_int32_t bitvector_any1(u_int32_t *b, u_int32_t offs, u_int32_t nbits)
{
index_t i;
u_int32_t nw, tail;
u_int32_t mask;
if (nbits == 0) return 0;
nw = (offs+nbits+31)>>5;
if (nw == 1) {
mask = (lomask(nbits)<<offs);
if ((b[0] & mask) != 0) return 1;
return 0;
}
mask = ~lomask(offs);
if ((b[0] & mask) != 0) return 1;
for(i=1; i < nw-1; i++) {
if (b[i] != 0) return 1;
}
tail = (offs+nbits)&31;
if (tail==0) {
if (b[i] != 0) return 1;
}
else {
mask = lomask(tail);
if ((b[i] & mask) != 0) return 1;
}
return 0;
}
static void adjust_offset_to(u_int32_t *dest, u_int32_t *src, u_int32_t nw,
u_int32_t soffs, u_int32_t newoffs)
{
if (newoffs > soffs)
bitvector_shl_to(dest, src, nw, newoffs-soffs, true);
else
bitvector_shr_to(dest, src, nw, soffs-newoffs);
}
#define BITVECTOR_BINARY_OP_TO(opname, OP) \
void bitvector_##opname##_to(u_int32_t *dest, u_int32_t doffs, \
u_int32_t *a, u_int32_t aoffs, \
u_int32_t *b, u_int32_t boffs, u_int32_t nbits) \
{ \
u_int32_t nw = (doffs+nbits+31)>>5; \
u_int32_t *temp = nw>MALLOC_CUTOFF ? malloc((nw+1)*4) : alloca((nw+1)*4);\
u_int32_t i, anw, bnw; \
if (aoffs == boffs) { \
anw = (aoffs+nbits+31)>>5; \
} \
else if (aoffs == doffs) { \
bnw = (boffs+nbits+31)>>5; \
adjust_offset_to(temp, b, bnw, boffs, aoffs); \
b = temp; anw = nw; \
} \
else { \
anw = (aoffs+nbits+31)>>5; \
bnw = (boffs+nbits+31)>>5; \
adjust_offset_to(temp, a, anw, aoffs, boffs); \
a = temp; aoffs = boffs; anw = bnw; \
} \
for(i=0; i < anw; i++) temp[i] = OP(a[i], b[i]); \
bitvector_copy(dest, doffs, temp, aoffs, nbits); \
if (nw>MALLOC_CUTOFF) free(temp); \
}
#define BV_AND(a,b) ((a)&(b))
#define BV_OR(a,b) ((a)|(b))
#define BV_XOR(a,b) ((a)^(b))
BITVECTOR_BINARY_OP_TO(and, BV_AND)
BITVECTOR_BINARY_OP_TO(or, BV_OR)
BITVECTOR_BINARY_OP_TO(xor, BV_XOR)

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#ifndef __BITVECTOR_H_
#define __BITVECTOR_H_
// a mask with n set lo or hi bits
#define lomask(n) (u_int32_t)((((u_int32_t)1)<<(n))-1)
#define himask(n) (~lomask(32-n))
#define ONES32 ((u_int32_t)0xffffffff)
#ifdef __INTEL_COMPILER
#define count_bits(b) _popcnt32(b)
#else
static inline u_int32_t count_bits(u_int32_t b)
{
b = b - ((b>>1)&0x55555555);
b = ((b>>2)&0x33333333) + (b&0x33333333);
b = ((b>>4)+b)&0x0f0f0f0f;
b += (b>>8);
b += (b>>16);
return b & 0x3f;
// here is the non-optimized version, for clarity:
/*
b = ((b>> 1)&0x55555555) + (b&0x55555555);
b = ((b>> 2)&0x33333333) + (b&0x33333333);
b = ((b>> 4)&0x0f0f0f0f) + (b&0x0f0f0f0f);
b = ((b>> 8)&0x00ff00ff) + (b&0x00ff00ff);
b = ((b>>16)&0x0000ffff) + (b&0x0000ffff);
return b & 0x3f;
*/
}
#endif
u_int32_t bitreverse(u_int32_t x);
u_int32_t *bitvector_new(size_t n, int initzero);
u_int32_t *bitvector_resize(u_int32_t *b, size_t n, int initzero);
void bitvector_set(u_int32_t *b, u_int32_t n, u_int32_t c);
u_int32_t bitvector_get(u_int32_t *b, u_int32_t n);
void bitvector_shr(u_int32_t *b, size_t n, u_int32_t s);
void bitvector_shr_to(u_int32_t *dest, u_int32_t *b, size_t n, u_int32_t s);
void bitvector_shl(u_int32_t *b, size_t n, u_int32_t s);
void bitvector_shl_to(u_int32_t *dest, u_int32_t *b, size_t n, u_int32_t s,
bool_t scrap);
void bitvector_fill(u_int32_t *b,u_int32_t offs, u_int32_t c, u_int32_t nbits);
void bitvector_copy(u_int32_t *dest, u_int32_t doffs,
u_int32_t *a, u_int32_t aoffs, u_int32_t nbits);
void bitvector_not(u_int32_t *b, u_int32_t offs, u_int32_t nbits);
void bitvector_not_to(u_int32_t *dest, u_int32_t doffs,
u_int32_t *a, u_int32_t aoffs, u_int32_t nbits);
void bitvector_reverse(u_int32_t *b, u_int32_t offs, u_int32_t nbits);
void bitvector_reverse_to(u_int32_t *dest, u_int32_t *src, u_int32_t soffs,
u_int32_t nbits);
void bitvector_and_to(u_int32_t *dest, u_int32_t doffs,
u_int32_t *a, u_int32_t aoffs,
u_int32_t *b, u_int32_t boffs, u_int32_t nbits);
void bitvector_or_to(u_int32_t *dest, u_int32_t doffs,
u_int32_t *a, u_int32_t aoffs,
u_int32_t *b, u_int32_t boffs, u_int32_t nbits);
void bitvector_xor_to(u_int32_t *dest, u_int32_t doffs,
u_int32_t *a, u_int32_t aoffs,
u_int32_t *b, u_int32_t boffs, u_int32_t nbits);
u_int32_t bitvector_count(u_int32_t *b, u_int32_t offs, u_int32_t nbits);
u_int32_t bitvector_any0(u_int32_t *b, u_int32_t offs, u_int32_t nbits);
u_int32_t bitvector_any1(u_int32_t *b, u_int32_t offs, u_int32_t nbits);
#endif

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#ifndef __CONFIG_H_
#define __CONFIG_H_
#define LINUX
#undef WIN32
#undef BITS64
#define ARCH_X86
#undef ARCH_X86_64
#define __CPU__ 586
#endif

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#include <math.h>
#include <stdlib.h>
#include <string.h>
#include "ieee754.h"
#include "dtypes.h"
#include "utils.h"
void snprint_cplx(char *s, size_t cnt, double re, double im,
// args to pass on to snprint_real
int width, int dec,
int max_digs_rt, int max_digs_lf,
// print spaces around sign in a+bi
int spflag)
{
int fzr = (re==0) || rel_zero(re,im);
int fzi = (im==0) || rel_zero(im,re);
size_t len, sl;
size_t space = cnt;
s[0] = '\0';
if (isnan(im) && fzr) {
if (space < 2) return;
snprint_real(s, space-2, im, width, dec, max_digs_rt, max_digs_lf);
strcat(s, "i");
return;
}
if (!fzr || (fzr && fzi)) {
if (space < 4) return;
snprint_real(s, space-4, re, width, dec, max_digs_rt, max_digs_lf);
if ((im >= 0 || (isnan(im)&&!sign_bit(im))) && !fzi) {
if (spflag) {
strcat(s, " + ");
}
else {
strcat(s, "+");
}
}
else if (!fzi) {
im = -im;
if (spflag)
strcat(s, " - ");
else
strcat(s, "-");
}
}
if (!fzi) {
len = sl = strlen(s);
if (dbl_equals(im, -1)) {
while (len-sl < (size_t)width-2 && len < (space-3))
s[len++] = ' ';
s[len] = '-';
s[len+1] = 'i';
s[len+2] = '\0';
}
else if (dbl_equals(im, 1)) {
while (len-sl < (size_t)width-1 && len < (space-2))
s[len++] = ' ';
s[len] = 'i';
s[len+1] = '\0';
}
else {
snprint_real(s+len, space-len-2, im, width, dec,
max_digs_rt, max_digs_lf);
strcat(s, "i");
}
}
}

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#include <math.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "ieee754.h"
#include "dtypes.h"
static uint64_t max_ulps;
static uint32_t flt_max_ulps;
static uint64_t nexti64pow2(uint64_t i)
{
if (i==0) return 1;
if ((i&(i-1))==0) return i;
if (i&BIT63) return BIT63;
// repeatedly clear bottom bit
while (i&(i-1))
i = i&(i-1);
return i<<1;
}
static uint32_t nexti32pow2(uint32_t i)
{
if (i==0) return 1;
if ((i&(i-1))==0) return i;
if (i&BIT31) return BIT31;
// repeatedly clear bottom bit
while (i&(i-1))
i = i&(i-1);
return i<<1;
}
void dbl_tolerance(double tol)
{
max_ulps = nexti64pow2((uint64_t)(tol/DBL_EPSILON));
}
void flt_tolerance(float tol)
{
flt_max_ulps = nexti32pow2((uint32_t)(tol/FLT_EPSILON));
}
#ifdef __INTEL_COMPILER
static inline int64_t llabs(int64_t j)
{
return NBABS(j, 64);
}
#else
extern int64_t llabs(int64_t j);
#endif
int dbl_equals(double a, double b)
{
int64_t aint, bint;
if (a == b)
return 1;
aint = *(int64_t*)&a;
bint = *(int64_t*)&b;
if (aint < 0)
aint = BIT63 - aint;
if (bint < 0)
bint = BIT63 - bint;
/* you'd think it makes no difference whether the result of llabs is
signed or unsigned, but if it's signed then the case of
0x8000000000000000 blows up, making 4 == -1 :) */
if ((uint64_t)llabs(aint-bint) <= max_ulps)
return 1;
return 0;
}
int flt_equals(float a, float b)
{
int32_t aint, bint;
if (a == b)
return 1;
aint = *(int32_t*)&a;
bint = *(int32_t*)&b;
if (aint < 0)
aint = BIT31 - aint;
if (bint < 0)
bint = BIT31 - bint;
if ((uint32_t)abs(aint-bint) <= flt_max_ulps)
return 1;
return 0;
}
int double_exponent(double d)
{
union ieee754_double dl;
dl.d = d;
return dl.ieee.exponent - IEEE754_DOUBLE_BIAS;
}
double double_mantissa(double d)
{
union ieee754_double dl;
dl.d = d;
dl.ieee.exponent = IEEE754_DOUBLE_BIAS;
dl.ieee.negative = 0;
return dl.d;
}
int float_exponent(float f)
{
union ieee754_float fl;
fl.f = f;
return fl.ieee.exponent - IEEE754_FLOAT_BIAS;
}
float float_mantissa(float f)
{
union ieee754_float fl;
fl.f = f;
fl.ieee.exponent = IEEE754_FLOAT_BIAS;
fl.ieee.negative = 0;
return fl.f;
}
void snprint_real(char *s, size_t cnt, double r,
int width, // printf field width, or 0
int dec, // # decimal digits desired, recommend 16
// # of zeros in .00...0x before using scientific notation
// recommend 3-4 or so
int max_digs_rt,
// # of digits left of decimal before scientific notation
// recommend 10
int max_digs_lf)
{
int mag;
double fpart, temp;
char format[8];
char num_format[3];
int sz, keepz=0;
s[0] = '\0';
if (width == -1) {
width = 0;
keepz=1;
}
if (isnan(r)) {
if (sign_bit(r))
strncpy(s, "-nan", cnt);
else
strncpy(s, "nan", cnt);
return;
}
if (r == 0) {
strncpy(s, "0", cnt);
return;
}
num_format[0] = 'l';
num_format[2] = '\0';
mag = double_exponent(r);
mag = (int)(((double)mag)/LOG2_10 + 0.5);
if (r == 0)
mag = 0;
if ((mag > max_digs_lf-1) || (mag < -max_digs_rt)) {
num_format[1] = 'e';
temp = r/pow(10, mag); /* see if number will have a decimal */
fpart = temp - floor(temp); /* when written in scientific notation */
}
else {
num_format[1] = 'f';
fpart = r - floor(r);
}
if (fpart == 0)
dec = 0;
if (width == 0) {
snprintf(format, 8, "%%.%d%s", dec, num_format);
}
else {
snprintf(format, 8, "%%%d.%d%s", width, dec, num_format);
}
sz = snprintf(s, cnt, format, r);
/* trim trailing zeros from fractions. not when using scientific
notation, since we might have e.g. 1.2000e+100. also not when we
need a specific output width */
if (width == 0 && !keepz) {
if (sz > 2 && fpart && num_format[1]!='e') {
while (s[sz-1] == '0') {
s[sz-1]='\0';
sz--;
}
// don't need trailing .
if (s[sz-1] == '.') {
s[sz-1] = '\0';
sz--;
}
}
}
// TODO. currently 1.1e20 prints as 1.1000000000000000e+20; be able to
// get rid of all those zeros.
}

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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#include <assert.h>
#include <errno.h>
#include <limits.h>
#include <sys/stat.h>
#include <sys/types.h>
#ifdef WIN32
#include <malloc.h>
#include <sys/timeb.h>
#include <windows.h>
#undef NO_ERROR
#undef MOD_SHIFT
#undef TRUE
#undef FALSE
#undef VOID
#else
#include <sys/time.h>
#include <sys/poll.h>
#include <unistd.h>
#endif
#include "dtypes.h"
void get_cwd(char *buf, size_t size)
{
#ifndef WIN32
getcwd(buf, size);
#else
GetCurrentDirectory(size, buf);
#endif
}
int set_cwd(char *buf)
{
#ifndef WIN32
if (chdir(buf) == -1)
return 1;
#else
if (SetCurrentDirectory(buf) == 0)
return 1;
#endif
return 0;
}
#ifdef LINUX
char *get_exename(char *buf, size_t size)
{
char linkname[64]; /* /proc/<pid>/exe */
pid_t pid;
ssize_t ret;
/* Get our PID and build the name of the link in /proc */
pid = getpid();
if (snprintf(linkname, sizeof(linkname), "/proc/%i/exe", pid) < 0)
return NULL;
/* Now read the symbolic link */
ret = readlink(linkname, buf, size);
/* In case of an error, leave the handling up to the caller */
if (ret == -1)
return NULL;
/* Report insufficient buffer size */
if ((size_t)ret >= size)
return NULL;
/* Ensure proper NUL termination */
buf[ret] = 0;
return buf;
}
#elif defined(WIN32)
char *get_exename(char *buf, size_t size)
{
if (GetModuleFileName(NULL, buf, size) == 0)
return NULL;
return buf;
}
#elif defined(MACOSX) || defined(MACINTEL)
#include "/Developer/Headers/FlatCarbon/Processes.h"
#include "/Developer/Headers/FlatCarbon/Files.h"
char *get_exename(char *buf, size_t size)
{
ProcessSerialNumber PSN;
FSRef ref;
if (GetCurrentProcess(&PSN) < 0 ||
GetProcessBundleLocation(&PSN, &ref) < 0 ||
FSRefMakePath(&ref, buf, size) < 0)
return NULL;
return buf;
}
#endif

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#ifndef __DIRPATH_H_
#define __DIRPATH_H_
#ifdef WIN32
#define PATHSEP '\\'
#define PATHSEPSTRING "\\"
#define PATHLISTSEP ';'
#define PATHLISTSEPSTRING ";"
#define ISPATHSEP(c) ((c)=='/' || (c)=='\\')
#define MAXPATHLEN 1024
#else
#define PATHSEP '/'
#define PATHSEPSTRING "/"
#define PATHLISTSEP ':'
#define PATHLISTSEPSTRING ":"
#define ISPATHSEP(c) ((c)=='/')
#endif
void get_cwd(char *buf, size_t size);
int set_cwd(char *buf);
char *get_exename(char *buf, size_t size);
#endif

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#ifndef __DTYPES_H_
#define __DTYPES_H_
/*
This file defines sane integer types for our target platforms. This
library only runs on machines with the following characteristics:
- supports integer word sizes of 8, 16, 32, and 64 bits
- uses unsigned and signed 2's complement representations
- all pointer types are the same size
- there is an integer type with the same size as a pointer
Some features require:
- IEEE 754 single- and double-precision floating point
We assume the LP64 convention for 64-bit platforms.
*/
#include "config.h"
typedef int bool_t;
/* unfortunately we can't make this an enum, since false is an invalid
enum label in C++ (since it's a keyword) */
#define false (0)
#define true (1)
#if defined(__INTEL_COMPILER) && defined(WIN32)
# define STATIC_INLINE static
# define INLINE
# ifdef BITS64
typedef unsigned long size_t;
# else
typedef unsigned int size_t;
# endif
#else
# define STATIC_INLINE static inline
# define INLINE inline
#endif
typedef unsigned char byte_t; /* 1 byte */
#if defined(WIN32)
typedef short int16_t;
typedef int int32_t;
typedef long long int64_t;
typedef unsigned char u_int8_t;
typedef unsigned short u_int16_t;
typedef unsigned int u_int32_t;
#ifdef BITS64
typedef unsigned long u_int64_t;
#else
typedef unsigned long long u_int64_t;
#endif
#ifdef __INTEL_COMPILER
typedef signed char int8_t;
typedef short int16_t;
typedef int int32_t;
#endif
#else
#include <sys/types.h>
#endif
#ifdef BITS64
#define TOP_BIT 0x8000000000000000
#define NBITS 64
typedef unsigned long uint_t; // preferred int type on platform
typedef long int_t;
typedef int64_t offset_t;
typedef u_int64_t index_t;
typedef int64_t ptrint_t; // pointer-size int
typedef u_int64_t u_ptrint_t
#else
#define TOP_BIT 0x80000000
#define NBITS 32
typedef unsigned long uint_t;
typedef long int_t;
typedef int32_t offset_t;
typedef u_int32_t index_t;
typedef int32_t ptrint_t;
typedef u_int32_t u_ptrint_t;
#endif
typedef u_int8_t uint8_t;
typedef u_int16_t uint16_t;
typedef u_int32_t uint32_t;
typedef u_int64_t uint64_t;
typedef u_ptrint_t uptrint_t;
#define ALIGN(x, sz) (((x) + (sz-1)) & (-sz))
#define DBL_MAXINT 9007199254740992LL
#define FLT_MAXINT 16777216
#define U64_MAX 18446744073709551615ULL
#define S64_MAX 9223372036854775807LL
#define S64_MIN (-S64_MAX - 1LL)
#define BIT63 0x8000000000000000LL
#define BIT31 0x80000000
#define DBL_EPSILON 2.2204460492503131e-16
#define FLT_EPSILON 1.1920928e-7
#define DBL_MAX 1.7976931348623157e+308
#define DBL_MIN 2.2250738585072014e-308
#define FLT_MAX 3.402823466e+38
#define FLT_MIN 1.175494351e-38
#define LOG2_10 3.3219280948873626
#define rel_zero(a, b) (fabs((a)/(b)) < DBL_EPSILON)
#define sign_bit(r) ((*(int64_t*)&(r)) & BIT63)
#define LABS(n) (((n)^((n)>>(NBITS-1))) - ((n)>>(NBITS-1)))
#define NBABS(n,nb) (((n)^((n)>>((nb)-1))) - ((n)>>((nb)-1)))
#define DFINITE(d) (((*(int64_t*)&(d))&0x7ff0000000000000LL)!=0x7ff0000000000000LL)
typedef enum { T_INT8, T_UINT8, T_INT16, T_UINT16, T_INT32, T_UINT32,
T_INT64, T_UINT64, T_FLOAT, T_DOUBLE } numerictype_t;
#define N_NUMTYPES ((int)T_DOUBLE+1)
#ifdef BITS64
# define T_LONG T_INT64
# define T_ULONG T_UINT64
#else
# define T_LONG T_INT32
# define T_ULONG T_UINT32
#endif
#endif

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/*
Hashing and random numbers
*/
#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#include "ieee754.h"
#include "dtypes.h"
#include "utils.h"
#include "hashing.h"
#include "timefuncs.h"
uint_t nextipow2(uint_t i)
{
if (i==0) return 1;
if ((i&(i-1))==0) return i;
if (i&TOP_BIT) return TOP_BIT;
// repeatedly clear bottom bit
while (i&(i-1))
i = i&(i-1);
return i<<1;
}
u_int32_t int32hash(u_int32_t a)
{
a = (a+0x7ed55d16) + (a<<12);
a = (a^0xc761c23c) ^ (a>>19);
a = (a+0x165667b1) + (a<<5);
a = (a+0xd3a2646c) ^ (a<<9);
a = (a+0xfd7046c5) + (a<<3);
a = (a^0xb55a4f09) ^ (a>>16);
return a;
}
u_int64_t int64hash(u_int64_t key)
{
key = (~key) + (key << 21); // key = (key << 21) - key - 1;
key = key ^ (key >> 24);
key = (key + (key << 3)) + (key << 8); // key * 265
key = key ^ (key >> 14);
key = (key + (key << 2)) + (key << 4); // key * 21
key = key ^ (key >> 28);
key = key + (key << 31);
return key;
}
u_int32_t int64to32hash(u_int64_t key)
{
key = (~key) + (key << 18); // key = (key << 18) - key - 1;
key = key ^ (key >> 31);
key = key * 21; // key = (key + (key << 2)) + (key << 4);
key = key ^ (key >> 11);
key = key + (key << 6);
key = key ^ (key >> 22);
return (u_int32_t)key;
}
#include "lookup3.c"
u_int64_t memhash(char* buf, size_t n)
{
u_int32_t c=0xcafe8881, b=0x4d6a087c;
hashlittle2(buf, n, &c, &b);
return (u_int64_t)c | (((u_int64_t)b)<<32);
}
#include "mt19937ar.c"
double rand_double()
{
union ieee754_double d;
d.ieee.mantissa0 = random();
d.ieee.mantissa1 = random();
d.ieee.negative = 0;
d.ieee.exponent = IEEE754_DOUBLE_BIAS + 0; /* 2^0 */
return d.d - 1.0;
}
float rand_float()
{
union ieee754_float f;
f.ieee.mantissa = random();
f.ieee.negative = 0;
f.ieee.exponent = IEEE754_FLOAT_BIAS + 0; /* 2^0 */
return f.f - 1.0;
}
void randn(double *pre, double *pim)
{
double s, vre, vim, ure, uim;
do {
ure = rand_double();
uim = rand_double();
vre = 2*ure - 1;
vim = 2*uim - 1;
s = vre*vre + vim*vim;
} while (s >= 1);
s = sqrt(-2*log(s)/s);
*pre = s * vre;
*pim = s * vim;
}
void randomize()
{
u_int64_t tm = i64time();
init_by_array((unsigned long*)&tm, 2);
}
void llt_init()
{
/*
I used this function to guess good values based on epsilon:
tol(eps) = exp(ln(eps)*-.2334012088721472)*eps
*/
dbl_tolerance(1e-12);
flt_tolerance(5e-6);
randomize();
}

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#ifndef __HASHING_H_
#define __HASHING_H_
uint_t nextipow2(uint_t i);
u_int32_t int32hash(u_int32_t a);
u_int64_t int64hash(u_int64_t key);
u_int32_t int64to32hash(u_int64_t key);
#ifdef BITS64
#define inthash int64hash
#else
#define inthash int32hash
#endif
u_int64_t memhash(char* buf, size_t n);
#define random() genrand_int32()
#define srandom(n) init_genrand(n)
double rand_double();
float rand_float();
void randn(double *pre, double *pim);
u_int64_t i64time();
void randomize();
unsigned long genrand_int32();
void init_genrand(unsigned long s);
#endif

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/* Copyright (C) 1992, 1995, 1996, 1999 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#ifndef _IEEE754_H
#define _IEEE754_H 1
#ifdef LINUX
#include <features.h>
#include <endian.h>
__BEGIN_DECLS
#else
#define __LITTLE_ENDIAN 1234
#define __BIG_ENDIAN 4321
#define __PDP_ENDIAN 3412
#endif
#ifdef MACOSX
#define __BYTE_ORDER __BIG_ENDIAN
#define __FLOAT_WORD_ORDER __BIG_ENDIAN
#endif
#ifdef MACINTEL
#define __BYTE_ORDER __LITTLE_ENDIAN
#define __FLOAT_WORD_ORDER __LITTLE_ENDIAN
#endif
#ifdef WIN32
#define __BYTE_ORDER __LITTLE_ENDIAN
#define __FLOAT_WORD_ORDER __LITTLE_ENDIAN
#endif
union ieee754_float
{
float f;
/* This is the IEEE 754 single-precision format. */
struct
{
#if __BYTE_ORDER == __BIG_ENDIAN
unsigned int negative:1;
unsigned int exponent:8;
unsigned int mantissa:23;
#endif /* Big endian. */
#if __BYTE_ORDER == __LITTLE_ENDIAN
unsigned int mantissa:23;
unsigned int exponent:8;
unsigned int negative:1;
#endif /* Little endian. */
} ieee;
/* This format makes it easier to see if a NaN is a signalling NaN. */
struct
{
#if __BYTE_ORDER == __BIG_ENDIAN
unsigned int negative:1;
unsigned int exponent:8;
unsigned int quiet_nan:1;
unsigned int mantissa:22;
#endif /* Big endian. */
#if __BYTE_ORDER == __LITTLE_ENDIAN
unsigned int mantissa:22;
unsigned int quiet_nan:1;
unsigned int exponent:8;
unsigned int negative:1;
#endif /* Little endian. */
} ieee_nan;
};
#define IEEE754_FLOAT_BIAS 0x7f /* Added to exponent. */
union ieee754_double
{
double d;
/* This is the IEEE 754 double-precision format. */
struct
{
#if __BYTE_ORDER == __BIG_ENDIAN
unsigned int negative:1;
unsigned int exponent:11;
/* Together these comprise the mantissa. */
unsigned int mantissa0:20;
unsigned int mantissa1:32;
#endif /* Big endian. */
#if __BYTE_ORDER == __LITTLE_ENDIAN
# if __FLOAT_WORD_ORDER == BIG_ENDIAN
unsigned int mantissa0:20;
unsigned int exponent:11;
unsigned int negative:1;
unsigned int mantissa1:32;
# else
/* Together these comprise the mantissa. */
unsigned int mantissa1:32;
unsigned int mantissa0:20;
unsigned int exponent:11;
unsigned int negative:1;
# endif
#endif /* Little endian. */
} ieee;
/* This format makes it easier to see if a NaN is a signalling NaN. */
struct
{
#if __BYTE_ORDER == __BIG_ENDIAN
unsigned int negative:1;
unsigned int exponent:11;
unsigned int quiet_nan:1;
/* Together these comprise the mantissa. */
unsigned int mantissa0:19;
unsigned int mantissa1:32;
#else
# if __FLOAT_WORD_ORDER == BIG_ENDIAN
unsigned int mantissa0:19;
unsigned int quiet_nan:1;
unsigned int exponent:11;
unsigned int negative:1;
unsigned int mantissa1:32;
# else
/* Together these comprise the mantissa. */
unsigned int mantissa1:32;
unsigned int mantissa0:19;
unsigned int quiet_nan:1;
unsigned int exponent:11;
unsigned int negative:1;
# endif
#endif
} ieee_nan;
};
#define IEEE754_DOUBLE_BIAS 0x3ff /* Added to exponent. */
union ieee854_long_double
{
long double d;
/* This is the IEEE 854 double-extended-precision format. */
struct
{
#if __BYTE_ORDER == __BIG_ENDIAN
unsigned int negative:1;
unsigned int exponent:15;
unsigned int empty:16;
unsigned int mantissa0:32;
unsigned int mantissa1:32;
#endif
#if __BYTE_ORDER == __LITTLE_ENDIAN
# if __FLOAT_WORD_ORDER == BIG_ENDIAN
unsigned int exponent:15;
unsigned int negative:1;
unsigned int empty:16;
unsigned int mantissa0:32;
unsigned int mantissa1:32;
# else
unsigned int mantissa1:32;
unsigned int mantissa0:32;
unsigned int exponent:15;
unsigned int negative:1;
unsigned int empty:16;
# endif
#endif
} ieee;
/* This is for NaNs in the IEEE 854 double-extended-precision format. */
struct
{
#if __BYTE_ORDER == __BIG_ENDIAN
unsigned int negative:1;
unsigned int exponent:15;
unsigned int empty:16;
unsigned int one:1;
unsigned int quiet_nan:1;
unsigned int mantissa0:30;
unsigned int mantissa1:32;
#endif
#if __BYTE_ORDER == __LITTLE_ENDIAN
# if __FLOAT_WORD_ORDER == BIG_ENDIAN
unsigned int exponent:15;
unsigned int negative:1;
unsigned int empty:16;
unsigned int mantissa0:30;
unsigned int quiet_nan:1;
unsigned int one:1;
unsigned int mantissa1:32;
# else
unsigned int mantissa1:32;
unsigned int mantissa0:30;
unsigned int quiet_nan:1;
unsigned int one:1;
unsigned int exponent:15;
unsigned int negative:1;
unsigned int empty:16;
# endif
#endif
} ieee_nan;
};
#define IEEE854_LONG_DOUBLE_BIAS 0x3fff
#ifdef LINUX
__END_DECLS
#endif
#endif /* ieee754.h */

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#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <assert.h>
#include <limits.h>
#include <errno.h>
#include <wchar.h>
#ifdef WIN32
#include <malloc.h>
#include <io.h>
#include <fcntl.h>
#define fileno _fileno
#else
#include <unistd.h>
#include <sys/time.h>
#include <sys/select.h>
#endif
#include "dtypes.h"
#include "utils.h"
#include "utf8.h"
#include "ios.h"
#include "socket.h"
#include "timefuncs.h"
/* OS-level primitive wrappers */
static int _fd_available(long fd)
{
#ifndef WIN32
fd_set set;
struct timeval tv = {0, 0};
FD_ZERO(&set);
FD_SET(fd, &set);
return (select(fd+1, &set, NULL, NULL, &tv)!=0);
#else
return 0;
#endif
}
// poll for read, unless forwrite!=0
static void _fd_poll(long fd, int forwrite)
{
#ifndef WIN32
fd_set set;
FD_ZERO(&set);
FD_SET(fd, &set);
if (forwrite)
select(fd+1, NULL, &set, NULL, NULL);
else
select(fd+1, &set, NULL, NULL, NULL);
#else
#endif
}
static int _enonfatal(int err)
{
return (err == EAGAIN || err == EINPROGRESS || err == EINTR ||
err == EWOULDBLOCK);
}
#define SLEEP_TIME 5//ms
// return error code, #bytes read in *nread
// these wrappers retry operations until success or a fatal error
static int _os_read(long fd, void *buf, size_t n, size_t *nread)
{
ssize_t r;
while (1) {
r = read((int)fd, buf, n);
if (r > -1) {
*nread = (size_t)r;
return 0;
}
if (!_enonfatal(errno)) {
*nread = 0;
return errno;
}
sleep_ms(SLEEP_TIME);
}
return 0;
}
static int _os_read_all(long fd, void *buf, size_t n, size_t *nread)
{
size_t got;
*nread = 0;
while (n>0) {
int err = _os_read(fd, buf, n, &got);
n -= got;
*nread += got;
buf += got;
if (err)
return err;
if (got == 0)
_fd_poll(fd, 0);
}
return 0;
}
static int _os_write(long fd, void *buf, size_t n, size_t *nwritten)
{
ssize_t r;
while (1) {
r = write((int)fd, buf, n);
if (r > -1) {
*nwritten = (size_t)r;
return 0;
}
if (!_enonfatal(errno)) {
*nwritten = 0;
return errno;
}
sleep_ms(5);
}
return 0;
}
static int _os_write_all(long fd, void *buf, size_t n, size_t *nwritten)
{
size_t wrote;
*nwritten = 0;
while (n>0) {
int err = _os_write(fd, buf, n, &wrote);
n -= wrote;
*nwritten += wrote;
buf += wrote;
if (err)
return err;
if (wrote == 0)
_fd_poll(fd, 1);
}
return 0;
}
/* internal utility functions */
static char *_buf_realloc(ios_t *s, size_t sz)
{
char *temp;
if (sz <= s->maxsize)
return s->buf;
if ((s->buf==NULL || s->buf==&s->local[0]) && (sz <= IOS_INLSIZE)) {
/* TODO: if we want to allow shrinking, see if the buffer shrank
down to this size, in which case we need to copy. */
s->buf = &s->local[0];
s->maxsize = IOS_INLSIZE;
s->ownbuf = 1;
return s->buf;
}
else if (s->ownbuf && s->buf != &s->local[0]) {
// if we own the buffer we're free to resize it
// always allocate 1 bigger in case user wants to add a NUL
// terminator after taking over the buffer
temp = realloc(s->buf, sz+1);
if (temp == NULL)
return NULL;
}
else {
temp = malloc(sz+1);
if (temp == NULL)
return NULL;
s->ownbuf = 1;
if (s->size > 0)
memcpy(temp, s->buf, s->size);
}
s->buf = temp;
s->maxsize = sz;
return s->buf;
}
// write a block of data into the buffer at the current position, resizing
// if necessary. returns # written.
static size_t _writebuf_force(ios_t *s, char *data, size_t n)
{
size_t amt;
size_t newsize;
if (n == 0)
return 0;
if (s->bpos + n > s->size) {
if (s->bpos + n > s->maxsize) {
/* TODO: here you might want to add a mechanism for limiting
the growth of the stream. */
newsize = s->maxsize * 2;
while (s->bpos + n > newsize)
newsize *= 2;
if (_buf_realloc(s, newsize) == NULL) {
/* no more space; write as much as we can */
amt = s->maxsize - s->bpos;
if (amt > 0) {
memcpy(&s->buf[s->bpos], data, amt);
}
s->bpos += amt;
s->size = s->maxsize;
return amt;
}
}
s->size = s->bpos + n;
}
memcpy(&s->buf[s->bpos], data, n);
s->bpos += n;
return n;
}
/* interface functions, low level */
size_t ios_read(ios_t *s, char *dest, size_t n, int all)
{
size_t tot = 0;
size_t got, avail;
int result;
while (n > 0) {
avail = s->size - s->bpos;
if (avail >= n) {
memcpy(dest, s->buf + s->bpos, n);
s->bpos += n;
return tot+n;
}
if (avail > 0) {
memcpy(dest, s->buf + s->bpos, avail);
}
if (s->bm == bm_mem || s->fd == -1) {
// can't get any more data
s->bpos += avail;
return avail;
}
else {
dest += avail;
n -= avail;
tot += avail;
ios_flush(s);
s->bpos = s->size = 0;
s->state = bst_rd;
}
if (n > (s->maxsize - (s->maxsize>>4))) {
// doesn't fit comfortably in buffer; go direct
if (all)
result = _os_read_all(s->fd, dest, n, &got);
else
result = _os_read(s->fd, dest, n, &got);
return tot+got;
}
else {
// refill buffer
if (_os_read(s->fd, s->buf, s->maxsize, &got)) {
return tot;
}
if (got == 0) {
if (all)
_fd_poll(s->fd, 0);
else
return tot;
}
s->size = got;
}
}
return tot;
}
size_t ios_write(ios_t *s, char *data, size_t n)
{
}
off_t ios_seek(ios_t *s, off_t pos)
{
}
off_t ios_seek_end(ios_t *s)
{
}
off_t ios_skip(ios_t *s, off_t offs)
{
}
off_t ios_pos(ios_t *s)
{
if (s->bm == bm_mem)
return (off_t)s->bpos;
off_t fdpos = lseek(s->fd, 0, SEEK_CUR);
if (fdpos == (off_t)-1)
return fdpos;
if (s->state == bst_wr)
fdpos += s->bpos;
else if (s->state == bst_rd)
fdpos -= (s->size - s->bpos);
return fdpos;
}
size_t ios_trunc(ios_t *s, size_t size)
{
}
int ios_eof(ios_t *s)
{
if (s->bm == bm_mem)
return (s->bpos >= s->size);
if (s->fd == -1)
return 1;
// todo
}
static void _discard_partial_buffer(ios_t *s)
{
// this function preserves the invariant that data to write
// begins at the beginning of the buffer, and s->size refers
// to how much valid file data is stored in the buffer.
// this needs to be called when normal operation is interrupted in
// the middle of the buffer. "normal operation" is reading or
// writing to the end of the buffer. this happens e.g. when flushing.
size_t delta = 0;
if (s->ndirty && s->size > s->ndirty) {
delta = s->size - s->ndirty;
memmove(s->buf, s->buf + s->ndirty, delta);
}
s->size -= s->ndirty;
s->bpos -= s->ndirty;
}
int ios_flush(ios_t *s)
{
if (s->ndirty == 0 || s->bm == bm_mem || s->buf == NULL)
return 0;
if (s->fd == -1)
return -1;
if (s->state == bst_rd) {
if (lseek(s->fd, -(off_t)s->size, SEEK_CUR) == (off_t)-1) {
}
}
size_t nw, ntowrite=s->ndirty;
// todo: this should use sendall
int err = _os_write(s->fd, s->buf, ntowrite, &nw);
// todo: try recovering from some kinds of errors (e.g. retry)
if (s->state == bst_rd) {
if (lseek(s->fd, s->size - nw, SEEK_CUR) == (off_t)-1) {
}
}
if (s->ndirty <= s->bpos) {
// in this case assume we're done with the first part of the buffer
_discard_partial_buffer(s);
}
s->ndirty = 0;
if (err)
return err;
if (nw < ntowrite)
return -1;
return 0;
}
void ios_close(ios_t *s)
{
ios_flush(s);
if (s->fd != -1 && s->ownfd)
close(s->fd);
s->fd = -1;
}
char *ios_takebuf(ios_t *s, size_t *psize)
{
char *buf;
ios_flush(s);
if (s->buf == &s->local[0]) {
buf = malloc(s->size+1);
if (buf == NULL)
return NULL;
if (s->size)
memcpy(buf, s->buf, s->size);
buf[s->size] = '\0';
}
else {
buf = s->buf;
}
*psize = s->size+1; // buffer is actually 1 bigger for terminating NUL
/* empty stream and reinitialize */
if (s->bm == bm_mem || s->bm == bm_none) {
s->buf = &s->local[0];
s->maxsize = IOS_INLSIZE;
}
else {
s->buf = NULL;
_buf_realloc(s, IOS_BUFSIZE);
}
s->size = s->bpos = 0;
return buf;
}
int ios_setbuf(ios_t *s, char *buf, size_t size, int own)
{
ios_flush(s);
size_t nvalid=0;
nvalid = (size < s->size) ? size : s->size;
memcpy(buf, s->buf, nvalid);
if (s->bpos > nvalid) {
// truncated
s->bpos = nvalid;
}
s->size = nvalid;
if (s->buf!=NULL && s->ownbuf && s->buf!=&s->local[0])
free(s->buf);
s->buf = buf;
s->maxsize = size;
s->ownbuf = own;
return 0;
}
int ios_bufmode(ios_t *s, bufmode_t mode)
{
// no fd; can only do mem-only buffering
if (s->fd == -1 && mode != bm_mem)
return -1;
s->bm = mode;
return 0;
}
void ios_bswap(ios_t *s, int bswap)
{
s->byteswap = !!bswap;
}
int ios_copy(ios_t *to, ios_t *from, size_t nbytes, bool_t all)
{
}
/* stream object initializers. we do no allocation. */
ios_t *ios_file(ios_t *s, char *fname, int create, int rewrite)
{
}
ios_t *ios_mem(ios_t *s, size_t initsize)
{
}
ios_t *ios_fd(ios_t *s, long fd)
{
}
/* higher level interface */

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#ifndef __IOS_H_
#define __IOS_H_
// this flag controls when data actually moves out to the underlying I/O
// channel. memory streams are a special case of this where the data
// never moves out.
typedef enum { bm_none, bm_line, bm_block, bm_mem } bufmode_t;
typedef enum { bst_none, bst_rd, bst_wr } bufstate_t;
#define IOS_INLSIZE 54
#define IOS_BUFSIZE 4095
typedef struct {
bufmode_t bm;
// the state only indicates where the underlying file position is relative
// to the buffer. reading: at the end. writing: at the beginning.
// in general, you can do any operation in any state.
bufstate_t state;
int errcode;
char *buf; // start of buffer
size_t maxsize; // space allocated to buffer
size_t size; // length of valid data in buf, >=ndirty
size_t bpos; // current position in buffer
size_t ndirty; // # bytes at &buf[0] that need to be written
// this is a public field that keeps a running count of bytes
// read or written. you can freely use and change it. this is
// intended for keeping track of relative positions in streams
// that don't have absolute positions (like sockets).
size_t tally;
// pointer-size integer to support platforms where it might have
// to be a pointer
long fd;
unsigned char byteswap:1;
//unsigned char readonly:1;
unsigned char ownbuf:1;
unsigned char ownfd:1;
// this means you can read, seek back, then read the same data
// again any number of times. usually only true for files and strings.
unsigned char rereadable:1;
// this enables "stenciled writes". you can alternately write and
// seek without flushing in between. this performs read-before-write
// to populate the buffer, so "rereadable" capability is required.
// this is off by default.
unsigned char stenciled:1;
// request durable writes (fsync)
// unsigned char durable:1;
// todo: mutex
char local[IOS_INLSIZE];
} ios_t;
/* low-level interface functions */
size_t ios_read(ios_t *s, char *dest, size_t n, int all);
size_t ios_write(ios_t *s, char *data, size_t n);
off_t ios_seek(ios_t *s, off_t pos); // absolute seek
off_t ios_seek_end(ios_t *s);
off_t ios_skip(ios_t *s, off_t offs); // relative seek
off_t ios_pos(ios_t *s); // get current position
size_t ios_trunc(ios_t *s, size_t size);
int ios_eof(ios_t *s);
int ios_flush(ios_t *s);
void ios_close(ios_t *s);
char *ios_takebuf(ios_t *s, size_t *psize); // release buffer to caller
// set buffer space to use
int ios_setbuf(ios_t *s, char *buf, size_t size, int own);
int ios_bufmode(ios_t *s, bufmode_t mode);
void ios_bswap(ios_t *s, int bswap);
int ios_copy(ios_t *to, ios_t *from, size_t nbytes, bool_t all);
//void ios_lock(ios_t *s);
//int ios_trylock(ios_t *s);
//int ios_unlock(ios_t *s);
/* stream creation */
ios_t *ios_file(ios_t *s, char *fname, int create, int rewrite);
ios_t *ios_mem(ios_t *s, size_t initsize);
ios_t *ios_fd(ios_t *s, long fd);
// todo: ios_socket
/* high-level functions - output */
int ios_putnum(ios_t *s, char *data, uint32_t type);
int ios_putint(ios_t *s, int n);
int ios_pututf8(ios_t *s, uint32_t wc);
int ios_putstringz(ios_t *s, char *str, bool_t do_write_nulterm);
int ios_printf(ios_t *s, char *format, ...);
/* high-level stream functions - input */
int ios_getnum(ios_t *s, char *data, uint32_t type);
int ios_getutf8(ios_t *s, uint32_t *pwc);
int ios_ungetutf8(ios_t *s, uint32_t wc);
int ios_getstringz(ios_t *dest, ios_t *src);
int ios_getstringn(ios_t *dest, ios_t *src, size_t nchars);
int ios_readline(ios_t *dest, ios_t *s, char delim);
int ios_getline(ios_t *s, char **pbuf, size_t *psz);
// seek by utf8 sequence increments
int ios_nextutf8(ios_t *s);
int ios_prevutf8(ios_t *s);
/* stdio-style functions */
#define IOS_EOF (-1)
int ios_putc(ios_t *s, int c);
wint_t ios_putwc(ios_t *s, wchar_t wc);
int ios_getc(ios_t *s);
wint_t ios_getwc(ios_t *s);
int ios_ungetc(ios_t *s, int c);
wint_t ios_ungetwc(ios_t *s, wint_t wc);
#define ios_puts(s, str) ios_write(s, str, strlen(str))
/*
With memory streams, mixed reads and writes are equivalent to performing
sequences of *p++, as either an lvalue or rvalue. File streams behave
similarly, but other streams might not support this. Using unbuffered
mode makes this more predictable.
Note on "unget" functions:
There are two kinds of functions here: those that operate on sized
blocks of bytes and those that operate on logical units like "character"
or "integer". The "unget" functions only work on logical units. There
is no "unget n bytes". You can only do an unget after a matching get.
However, data pushed back by an unget is available to all read operations.
The reason for this is that unget is defined in terms of its effect on
the underlying buffer (namely, it rebuffers data as if it had been
buffered but not read yet). IOS reserves the right to perform large block
operations directly, bypassing the buffer. In such a case data was
never buffered, so "rebuffering" has no meaning (i.e. there is no
correspondence between the buffer and the physical stream).
Single-bit I/O is able to write partial bytes ONLY IF the stream supports
seeking. Also, line buffering is not well-defined in the context of
single-bit I/O, so it might not do what you expect.
implementation notes:
in order to know where we are in a file, we must ensure the buffer
is only populated from the underlying stream starting with p==buf.
to switch from writing to reading: flush, set p=buf, cnt=0
to switch from reading to writing: seek backwards cnt bytes, p=buf, cnt=0
when writing: buf starts at curr. physical stream pos, p - buf is how
many bytes we've written logically. cnt==0
dirty == (bitpos>0 && state==iost_wr), EXCEPT right after switching from
reading to writing, where we might be in the middle of a byte without
having changed it.
to write a bit: if !dirty, read up to maxsize-(p-buf) into buffer, then
seek back by the same amount (undo it). write onto those bits. now set
the dirty bit. in this state, we can bit-read up to the end of the byte,
then formally switch to the read state using flush.
design points:
- data-source independence, including memory streams
- support 64-bit and large files
- efficient, low-latency buffering
- unget
- expose buffer to user, allow user-owned buffers
- allow direct I/O, don't always go through buffer
- buffer-internal seeking. makes seeking back 1-2 bytes very fast,
and makes it possible for sockets where it otherwise wouldn't be
- special support for utf8
- tries to allow switching between reading and writing
- type-aware functions with byte-order swapping service
- position counter for meaningful data offsets with sockets
note:
the current code needs to be mostly rewritten. the design should be
as follows:
the buffer is a view of part of a file/stream. you can seek, read, and
write around in it as much as you like, as if it were just a string.
we keep track of the part of the buffer that's invalid (written to).
we remember whether the position of the underlying stream is aligned
with the end of the buffer (reading mode) or the beginning (writing mode).
based on this info, we might have to seek back before doing a flush.
as optimizations, we do no writing if the buffer isn't "dirty", and we
do no reading if the data will only be overwritten.
*/
#endif

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#ifndef __LLT_H_
#define __LLT_H_
#include "dtypes.h"
#include "utils.h"
#include "utf8.h"
#include "ios.h"
#include "socket.h"
#include "timefuncs.h"
#include "hashing.h"
#include "ptrhash.h"
#include "bitvector.h"
#include "dirpath.h"
void llt_init();
#endif

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/*
-------------------------------------------------------------------------------
lookup3.c, by Bob Jenkins, May 2006, Public Domain.
These are functions for producing 32-bit hashes for hash table lookup.
hashword(), hashlittle(), hashlittle2(), hashbig(), mix(), and final()
are externally useful functions. Routines to test the hash are included
if SELF_TEST is defined. You can use this free for any purpose. It's in
the public domain. It has no warranty.
You probably want to use hashlittle(). hashlittle() and hashbig()
hash byte arrays. hashlittle() is is faster than hashbig() on
little-endian machines. Intel and AMD are little-endian machines.
On second thought, you probably want hashlittle2(), which is identical to
hashlittle() except it returns two 32-bit hashes for the price of one.
You could implement hashbig2() if you wanted but I haven't bothered here.
If you want to find a hash of, say, exactly 7 integers, do
a = i1; b = i2; c = i3;
mix(a,b,c);
a += i4; b += i5; c += i6;
mix(a,b,c);
a += i7;
final(a,b,c);
then use c as the hash value. If you have a variable length array of
4-byte integers to hash, use hashword(). If you have a byte array (like
a character string), use hashlittle(). If you have several byte arrays, or
a mix of things, see the comments above hashlittle().
Why is this so big? I read 12 bytes at a time into 3 4-byte integers,
then mix those integers. This is fast (you can do a lot more thorough
mixing with 12*3 instructions on 3 integers than you can with 3 instructions
on 1 byte), but shoehorning those bytes into integers efficiently is messy.
-------------------------------------------------------------------------------
*/
//#define SELF_TEST 1
#include <stdio.h> /* defines printf for tests */
#include <time.h> /* defines time_t for timings in the test */
#ifndef WIN32
#include <stdint.h> /* defines uint32_t etc */
#include <sys/param.h> /* attempt to define endianness */
#else
typedef unsigned int uint32_t;
typedef unsigned char uint8_t;
typedef unsigned short uint16_t;
#endif
#ifdef LINUX
# include <endian.h> /* attempt to define endianness */
#endif
/*
* My best guess at if you are big-endian or little-endian. This may
* need adjustment.
*/
#if (defined(__BYTE_ORDER) && defined(__LITTLE_ENDIAN) && \
__BYTE_ORDER == __LITTLE_ENDIAN) || \
(defined(i386) || defined(__i386__) || defined(__i486__) || \
defined(__i586__) || defined(__i686__) || defined(vax) || defined(MIPSEL))
# define HASH_LITTLE_ENDIAN 1
# define HASH_BIG_ENDIAN 0
#elif (defined(__BYTE_ORDER) && defined(__BIG_ENDIAN) && \
__BYTE_ORDER == __BIG_ENDIAN) || \
(defined(sparc) || defined(POWERPC) || defined(mc68000) || defined(sel))
# define HASH_LITTLE_ENDIAN 0
# define HASH_BIG_ENDIAN 1
#else
# define HASH_LITTLE_ENDIAN 0
# define HASH_BIG_ENDIAN 0
#endif
#define hashsize(n) ((uint32_t)1<<(n))
#define hashmask(n) (hashsize(n)-1)
#define rot(x,k) (((x)<<(k)) | ((x)>>(32-(k))))
/*
-------------------------------------------------------------------------------
mix -- mix 3 32-bit values reversibly.
This is reversible, so any information in (a,b,c) before mix() is
still in (a,b,c) after mix().
If four pairs of (a,b,c) inputs are run through mix(), or through
mix() in reverse, there are at least 32 bits of the output that
are sometimes the same for one pair and different for another pair.
This was tested for:
* pairs that differed by one bit, by two bits, in any combination
of top bits of (a,b,c), or in any combination of bottom bits of
(a,b,c).
* "differ" is defined as +, -, ^, or ~^. For + and -, I transformed
the output delta to a Gray code (a^(a>>1)) so a string of 1's (as
is commonly produced by subtraction) look like a single 1-bit
difference.
* the base values were pseudorandom, all zero but one bit set, or
all zero plus a counter that starts at zero.
Some k values for my "a-=c; a^=rot(c,k); c+=b;" arrangement that
satisfy this are
4 6 8 16 19 4
9 15 3 18 27 15
14 9 3 7 17 3
Well, "9 15 3 18 27 15" didn't quite get 32 bits diffing
for "differ" defined as + with a one-bit base and a two-bit delta. I
used http://burtleburtle.net/bob/hash/avalanche.html to choose
the operations, constants, and arrangements of the variables.
This does not achieve avalanche. There are input bits of (a,b,c)
that fail to affect some output bits of (a,b,c), especially of a. The
most thoroughly mixed value is c, but it doesn't really even achieve
avalanche in c.
This allows some parallelism. Read-after-writes are good at doubling
the number of bits affected, so the goal of mixing pulls in the opposite
direction as the goal of parallelism. I did what I could. Rotates
seem to cost as much as shifts on every machine I could lay my hands
on, and rotates are much kinder to the top and bottom bits, so I used
rotates.
-------------------------------------------------------------------------------
*/
#define mix(a,b,c) \
{ \
a -= c; a ^= rot(c, 4); c += b; \
b -= a; b ^= rot(a, 6); a += c; \
c -= b; c ^= rot(b, 8); b += a; \
a -= c; a ^= rot(c,16); c += b; \
b -= a; b ^= rot(a,19); a += c; \
c -= b; c ^= rot(b, 4); b += a; \
}
/*
-------------------------------------------------------------------------------
final -- final mixing of 3 32-bit values (a,b,c) into c
Pairs of (a,b,c) values differing in only a few bits will usually
produce values of c that look totally different. This was tested for
* pairs that differed by one bit, by two bits, in any combination
of top bits of (a,b,c), or in any combination of bottom bits of
(a,b,c).
* "differ" is defined as +, -, ^, or ~^. For + and -, I transformed
the output delta to a Gray code (a^(a>>1)) so a string of 1's (as
is commonly produced by subtraction) look like a single 1-bit
difference.
* the base values were pseudorandom, all zero but one bit set, or
all zero plus a counter that starts at zero.
These constants passed:
14 11 25 16 4 14 24
12 14 25 16 4 14 24
and these came close:
4 8 15 26 3 22 24
10 8 15 26 3 22 24
11 8 15 26 3 22 24
-------------------------------------------------------------------------------
*/
#define final(a,b,c) \
{ \
c ^= b; c -= rot(b,14); \
a ^= c; a -= rot(c,11); \
b ^= a; b -= rot(a,25); \
c ^= b; c -= rot(b,16); \
a ^= c; a -= rot(c,4); \
b ^= a; b -= rot(a,14); \
c ^= b; c -= rot(b,24); \
}
/*
--------------------------------------------------------------------
This works on all machines. To be useful, it requires
-- that the key be an array of uint32_t's, and
-- that the length be the number of uint32_t's in the key
The function hashword() is identical to hashlittle() on little-endian
machines, and identical to hashbig() on big-endian machines,
except that the length has to be measured in uint32_ts rather than in
bytes. hashlittle() is more complicated than hashword() only because
hashlittle() has to dance around fitting the key bytes into registers.
--------------------------------------------------------------------
*/
uint32_t hashword(
const uint32_t *k, /* the key, an array of uint32_t values */
size_t length, /* the length of the key, in uint32_ts */
uint32_t initval) /* the previous hash, or an arbitrary value */
{
uint32_t a,b,c;
/* Set up the internal state */
a = b = c = 0xdeadbeef + (((uint32_t)length)<<2) + initval;
/*------------------------------------------------- handle most of the key */
while (length > 3)
{
a += k[0];
b += k[1];
c += k[2];
mix(a,b,c);
length -= 3;
k += 3;
}
/*------------------------------------------- handle the last 3 uint32_t's */
switch(length) /* all the case statements fall through */
{
case 3 : c+=k[2];
case 2 : b+=k[1];
case 1 : a+=k[0];
final(a,b,c);
case 0: /* case 0: nothing left to add */
break;
}
/*------------------------------------------------------ report the result */
return c;
}
/*
--------------------------------------------------------------------
hashword2() -- same as hashword(), but take two seeds and return two
32-bit values. pc and pb must both be nonnull, and *pc and *pb must
both be initialized with seeds. If you pass in (*pb)==0, the output
(*pc) will be the same as the return value from hashword().
--------------------------------------------------------------------
*/
void hashword2 (
const uint32_t *k, /* the key, an array of uint32_t values */
size_t length, /* the length of the key, in uint32_ts */
uint32_t *pc, /* IN: seed OUT: primary hash value */
uint32_t *pb) /* IN: more seed OUT: secondary hash value */
{
uint32_t a,b,c;
/* Set up the internal state */
a = b = c = 0xdeadbeef + ((uint32_t)(length<<2)) + *pc;
c += *pb;
/*------------------------------------------------- handle most of the key */
while (length > 3)
{
a += k[0];
b += k[1];
c += k[2];
mix(a,b,c);
length -= 3;
k += 3;
}
/*------------------------------------------- handle the last 3 uint32_t's */
switch(length) /* all the case statements fall through */
{
case 3 : c+=k[2];
case 2 : b+=k[1];
case 1 : a+=k[0];
final(a,b,c);
case 0: /* case 0: nothing left to add */
break;
}
/*------------------------------------------------------ report the result */
*pc=c; *pb=b;
}
#if 0
/*
-------------------------------------------------------------------------------
hashlittle() -- hash a variable-length key into a 32-bit value
k : the key (the unaligned variable-length array of bytes)
length : the length of the key, counting by bytes
initval : can be any 4-byte value
Returns a 32-bit value. Every bit of the key affects every bit of
the return value. Two keys differing by one or two bits will have
totally different hash values.
The best hash table sizes are powers of 2. There is no need to do
mod a prime (mod is sooo slow!). If you need less than 32 bits,
use a bitmask. For example, if you need only 10 bits, do
h = (h & hashmask(10));
In which case, the hash table should have hashsize(10) elements.
If you are hashing n strings (uint8_t **)k, do it like this:
for (i=0, h=0; i<n; ++i) h = hashlittle( k[i], len[i], h);
By Bob Jenkins, 2006. bob_jenkins@burtleburtle.net. You may use this
code any way you wish, private, educational, or commercial. It's free.
Use for hash table lookup, or anything where one collision in 2^^32 is
acceptable. Do NOT use for cryptographic purposes.
-------------------------------------------------------------------------------
*/
uint32_t hashlittle( const void *key, size_t length, uint32_t initval)
{
uint32_t a,b,c; /* internal state */
union { const void *ptr; size_t i; } u; /* needed for Mac Powerbook G4 */
/* Set up the internal state */
a = b = c = 0xdeadbeef + ((uint32_t)length) + initval;
u.ptr = key;
if (HASH_LITTLE_ENDIAN && ((u.i & 0x3) == 0)) {
const uint32_t *k = (const uint32_t *)key; /* read 32-bit chunks */
const uint8_t *k8;
/*------ all but last block: aligned reads and affect 32 bits of (a,b,c) */
while (length > 12)
{
a += k[0];
b += k[1];
c += k[2];
mix(a,b,c);
length -= 12;
k += 3;
}
/*----------------------------- handle the last (probably partial) block */
/*
* "k[2]&0xffffff" actually reads beyond the end of the string, but
* then masks off the part it's not allowed to read. Because the
* string is aligned, the masked-off tail is in the same word as the
* rest of the string. Every machine with memory protection I've seen
* does it on word boundaries, so is OK with this. But VALGRIND will
* still catch it and complain. The masking trick does make the hash
* noticably faster for short strings (like English words).
*/
#ifndef VALGRIND
switch(length)
{
case 12: c+=k[2]; b+=k[1]; a+=k[0]; break;
case 11: c+=k[2]&0xffffff; b+=k[1]; a+=k[0]; break;
case 10: c+=k[2]&0xffff; b+=k[1]; a+=k[0]; break;
case 9 : c+=k[2]&0xff; b+=k[1]; a+=k[0]; break;
case 8 : b+=k[1]; a+=k[0]; break;
case 7 : b+=k[1]&0xffffff; a+=k[0]; break;
case 6 : b+=k[1]&0xffff; a+=k[0]; break;
case 5 : b+=k[1]&0xff; a+=k[0]; break;
case 4 : a+=k[0]; break;
case 3 : a+=k[0]&0xffffff; break;
case 2 : a+=k[0]&0xffff; break;
case 1 : a+=k[0]&0xff; break;
case 0 : return c; /* zero length strings require no mixing */
}
#else /* make valgrind happy */
k8 = (const uint8_t *)k;
switch(length)
{
case 12: c+=k[2]; b+=k[1]; a+=k[0]; break;
case 11: c+=((uint32_t)k8[10])<<16; /* fall through */
case 10: c+=((uint32_t)k8[9])<<8; /* fall through */
case 9 : c+=k8[8]; /* fall through */
case 8 : b+=k[1]; a+=k[0]; break;
case 7 : b+=((uint32_t)k8[6])<<16; /* fall through */
case 6 : b+=((uint32_t)k8[5])<<8; /* fall through */
case 5 : b+=k8[4]; /* fall through */
case 4 : a+=k[0]; break;
case 3 : a+=((uint32_t)k8[2])<<16; /* fall through */
case 2 : a+=((uint32_t)k8[1])<<8; /* fall through */
case 1 : a+=k8[0]; break;
case 0 : return c;
}
#endif /* !valgrind */
} else if (HASH_LITTLE_ENDIAN && ((u.i & 0x1) == 0)) {
const uint16_t *k = (const uint16_t *)key; /* read 16-bit chunks */
const uint8_t *k8;
/*--------------- all but last block: aligned reads and different mixing */
while (length > 12)
{
a += k[0] + (((uint32_t)k[1])<<16);
b += k[2] + (((uint32_t)k[3])<<16);
c += k[4] + (((uint32_t)k[5])<<16);
mix(a,b,c);
length -= 12;
k += 6;
}
/*----------------------------- handle the last (probably partial) block */
k8 = (const uint8_t *)k;
switch(length)
{
case 12: c+=k[4]+(((uint32_t)k[5])<<16);
b+=k[2]+(((uint32_t)k[3])<<16);
a+=k[0]+(((uint32_t)k[1])<<16);
break;
case 11: c+=((uint32_t)k8[10])<<16; /* fall through */
case 10: c+=k[4];
b+=k[2]+(((uint32_t)k[3])<<16);
a+=k[0]+(((uint32_t)k[1])<<16);
break;
case 9 : c+=k8[8]; /* fall through */
case 8 : b+=k[2]+(((uint32_t)k[3])<<16);
a+=k[0]+(((uint32_t)k[1])<<16);
break;
case 7 : b+=((uint32_t)k8[6])<<16; /* fall through */
case 6 : b+=k[2];
a+=k[0]+(((uint32_t)k[1])<<16);
break;
case 5 : b+=k8[4]; /* fall through */
case 4 : a+=k[0]+(((uint32_t)k[1])<<16);
break;
case 3 : a+=((uint32_t)k8[2])<<16; /* fall through */
case 2 : a+=k[0];
break;
case 1 : a+=k8[0];
break;
case 0 : return c; /* zero length requires no mixing */
}
} else { /* need to read the key one byte at a time */
const uint8_t *k = (const uint8_t *)key;
/*--------------- all but the last block: affect some 32 bits of (a,b,c) */
while (length > 12)
{
a += k[0];
a += ((uint32_t)k[1])<<8;
a += ((uint32_t)k[2])<<16;
a += ((uint32_t)k[3])<<24;
b += k[4];
b += ((uint32_t)k[5])<<8;
b += ((uint32_t)k[6])<<16;
b += ((uint32_t)k[7])<<24;
c += k[8];
c += ((uint32_t)k[9])<<8;
c += ((uint32_t)k[10])<<16;
c += ((uint32_t)k[11])<<24;
mix(a,b,c);
length -= 12;
k += 12;
}
/*-------------------------------- last block: affect all 32 bits of (c) */
switch(length) /* all the case statements fall through */
{
case 12: c+=((uint32_t)k[11])<<24;
case 11: c+=((uint32_t)k[10])<<16;
case 10: c+=((uint32_t)k[9])<<8;
case 9 : c+=k[8];
case 8 : b+=((uint32_t)k[7])<<24;
case 7 : b+=((uint32_t)k[6])<<16;
case 6 : b+=((uint32_t)k[5])<<8;
case 5 : b+=k[4];
case 4 : a+=((uint32_t)k[3])<<24;
case 3 : a+=((uint32_t)k[2])<<16;
case 2 : a+=((uint32_t)k[1])<<8;
case 1 : a+=k[0];
break;
case 0 : return c;
}
}
final(a,b,c);
return c;
}
#endif
/*
* hashlittle2: return 2 32-bit hash values
*
* This is identical to hashlittle(), except it returns two 32-bit hash
* values instead of just one. This is good enough for hash table
* lookup with 2^^64 buckets, or if you want a second hash if you're not
* happy with the first, or if you want a probably-unique 64-bit ID for
* the key. *pc is better mixed than *pb, so use *pc first. If you want
* a 64-bit value do something like "*pc + (((uint64_t)*pb)<<32)".
*/
void hashlittle2(
const void *key, /* the key to hash */
size_t length, /* length of the key */
uint32_t *pc, /* IN: primary initval, OUT: primary hash */
uint32_t *pb) /* IN: secondary initval, OUT: secondary hash */
{
uint32_t a,b,c; /* internal state */
union { const void *ptr; size_t i; } u; /* needed for Mac Powerbook G4 */
/* Set up the internal state */
a = b = c = 0xdeadbeef + ((uint32_t)length) + *pc;
c += *pb;
u.ptr = key;
if (HASH_LITTLE_ENDIAN && ((u.i & 0x3) == 0)) {
const uint32_t *k = (const uint32_t *)key; /* read 32-bit chunks */
const uint8_t *k8;
/*------ all but last block: aligned reads and affect 32 bits of (a,b,c) */
while (length > 12)
{
a += k[0];
b += k[1];
c += k[2];
mix(a,b,c);
length -= 12;
k += 3;
}
/*----------------------------- handle the last (probably partial) block */
/*
* "k[2]&0xffffff" actually reads beyond the end of the string, but
* then masks off the part it's not allowed to read. Because the
* string is aligned, the masked-off tail is in the same word as the
* rest of the string. Every machine with memory protection I've seen
* does it on word boundaries, so is OK with this. But VALGRIND will
* still catch it and complain. The masking trick does make the hash
* noticably faster for short strings (like English words).
*/
#ifndef VALGRIND
(void)k8;
switch(length)
{
case 12: c+=k[2]; b+=k[1]; a+=k[0]; break;
case 11: c+=k[2]&0xffffff; b+=k[1]; a+=k[0]; break;
case 10: c+=k[2]&0xffff; b+=k[1]; a+=k[0]; break;
case 9 : c+=k[2]&0xff; b+=k[1]; a+=k[0]; break;
case 8 : b+=k[1]; a+=k[0]; break;
case 7 : b+=k[1]&0xffffff; a+=k[0]; break;
case 6 : b+=k[1]&0xffff; a+=k[0]; break;
case 5 : b+=k[1]&0xff; a+=k[0]; break;
case 4 : a+=k[0]; break;
case 3 : a+=k[0]&0xffffff; break;
case 2 : a+=k[0]&0xffff; break;
case 1 : a+=k[0]&0xff; break;
case 0 : *pc=c; *pb=b; return; /* zero length strings require no mixing */
}
#else /* make valgrind happy */
k8 = (const uint8_t *)k;
switch(length)
{
case 12: c+=k[2]; b+=k[1]; a+=k[0]; break;
case 11: c+=((uint32_t)k8[10])<<16; /* fall through */
case 10: c+=((uint32_t)k8[9])<<8; /* fall through */
case 9 : c+=k8[8]; /* fall through */
case 8 : b+=k[1]; a+=k[0]; break;
case 7 : b+=((uint32_t)k8[6])<<16; /* fall through */
case 6 : b+=((uint32_t)k8[5])<<8; /* fall through */
case 5 : b+=k8[4]; /* fall through */
case 4 : a+=k[0]; break;
case 3 : a+=((uint32_t)k8[2])<<16; /* fall through */
case 2 : a+=((uint32_t)k8[1])<<8; /* fall through */
case 1 : a+=k8[0]; break;
case 0 : *pc=c; *pb=b; return; /* zero length strings require no mixing */
}
#endif /* !valgrind */
} else if (HASH_LITTLE_ENDIAN && ((u.i & 0x1) == 0)) {
const uint16_t *k = (const uint16_t *)key; /* read 16-bit chunks */
const uint8_t *k8;
/*--------------- all but last block: aligned reads and different mixing */
while (length > 12)
{
a += k[0] + (((uint32_t)k[1])<<16);
b += k[2] + (((uint32_t)k[3])<<16);
c += k[4] + (((uint32_t)k[5])<<16);
mix(a,b,c);
length -= 12;
k += 6;
}
/*----------------------------- handle the last (probably partial) block */
k8 = (const uint8_t *)k;
switch(length)
{
case 12: c+=k[4]+(((uint32_t)k[5])<<16);
b+=k[2]+(((uint32_t)k[3])<<16);
a+=k[0]+(((uint32_t)k[1])<<16);
break;
case 11: c+=((uint32_t)k8[10])<<16; /* fall through */
case 10: c+=k[4];
b+=k[2]+(((uint32_t)k[3])<<16);
a+=k[0]+(((uint32_t)k[1])<<16);
break;
case 9 : c+=k8[8]; /* fall through */
case 8 : b+=k[2]+(((uint32_t)k[3])<<16);
a+=k[0]+(((uint32_t)k[1])<<16);
break;
case 7 : b+=((uint32_t)k8[6])<<16; /* fall through */
case 6 : b+=k[2];
a+=k[0]+(((uint32_t)k[1])<<16);
break;
case 5 : b+=k8[4]; /* fall through */
case 4 : a+=k[0]+(((uint32_t)k[1])<<16);
break;
case 3 : a+=((uint32_t)k8[2])<<16; /* fall through */
case 2 : a+=k[0];
break;
case 1 : a+=k8[0];
break;
case 0 : *pc=c; *pb=b; return; /* zero length strings require no mixing */
}
} else { /* need to read the key one byte at a time */
const uint8_t *k = (const uint8_t *)key;
/*--------------- all but the last block: affect some 32 bits of (a,b,c) */
while (length > 12)
{
a += k[0];
a += ((uint32_t)k[1])<<8;
a += ((uint32_t)k[2])<<16;
a += ((uint32_t)k[3])<<24;
b += k[4];
b += ((uint32_t)k[5])<<8;
b += ((uint32_t)k[6])<<16;
b += ((uint32_t)k[7])<<24;
c += k[8];
c += ((uint32_t)k[9])<<8;
c += ((uint32_t)k[10])<<16;
c += ((uint32_t)k[11])<<24;
mix(a,b,c);
length -= 12;
k += 12;
}
/*-------------------------------- last block: affect all 32 bits of (c) */
switch(length) /* all the case statements fall through */
{
case 12: c+=((uint32_t)k[11])<<24;
case 11: c+=((uint32_t)k[10])<<16;
case 10: c+=((uint32_t)k[9])<<8;
case 9 : c+=k[8];
case 8 : b+=((uint32_t)k[7])<<24;
case 7 : b+=((uint32_t)k[6])<<16;
case 6 : b+=((uint32_t)k[5])<<8;
case 5 : b+=k[4];
case 4 : a+=((uint32_t)k[3])<<24;
case 3 : a+=((uint32_t)k[2])<<16;
case 2 : a+=((uint32_t)k[1])<<8;
case 1 : a+=k[0];
break;
case 0 : *pc=c; *pb=b; return; /* zero length strings require no mixing */
}
}
final(a,b,c);
*pc=c; *pb=b;
}
#if 0
/*
* hashbig():
* This is the same as hashword() on big-endian machines. It is different
* from hashlittle() on all machines. hashbig() takes advantage of
* big-endian byte ordering.
*/
uint32_t hashbig( const void *key, size_t length, uint32_t initval)
{
uint32_t a,b,c;
union { const void *ptr; size_t i; } u; /* to cast key to (size_t) happily */
/* Set up the internal state */
a = b = c = 0xdeadbeef + ((uint32_t)length) + initval;
u.ptr = key;
if (HASH_BIG_ENDIAN && ((u.i & 0x3) == 0)) {
const uint32_t *k = (const uint32_t *)key; /* read 32-bit chunks */
const uint8_t *k8;
/*------ all but last block: aligned reads and affect 32 bits of (a,b,c) */
while (length > 12)
{
a += k[0];
b += k[1];
c += k[2];
mix(a,b,c);
length -= 12;
k += 3;
}
/*----------------------------- handle the last (probably partial) block */
/*
* "k[2]<<8" actually reads beyond the end of the string, but
* then shifts out the part it's not allowed to read. Because the
* string is aligned, the illegal read is in the same word as the
* rest of the string. Every machine with memory protection I've seen
* does it on word boundaries, so is OK with this. But VALGRIND will
* still catch it and complain. The masking trick does make the hash
* noticably faster for short strings (like English words).
*/
#ifndef VALGRIND
switch(length)
{
case 12: c+=k[2]; b+=k[1]; a+=k[0]; break;
case 11: c+=k[2]&0xffffff00; b+=k[1]; a+=k[0]; break;
case 10: c+=k[2]&0xffff0000; b+=k[1]; a+=k[0]; break;
case 9 : c+=k[2]&0xff000000; b+=k[1]; a+=k[0]; break;
case 8 : b+=k[1]; a+=k[0]; break;
case 7 : b+=k[1]&0xffffff00; a+=k[0]; break;
case 6 : b+=k[1]&0xffff0000; a+=k[0]; break;
case 5 : b+=k[1]&0xff000000; a+=k[0]; break;
case 4 : a+=k[0]; break;
case 3 : a+=k[0]&0xffffff00; break;
case 2 : a+=k[0]&0xffff0000; break;
case 1 : a+=k[0]&0xff000000; break;
case 0 : return c; /* zero length strings require no mixing */
}
#else /* make valgrind happy */
k8 = (const uint8_t *)k;
switch(length) /* all the case statements fall through */
{
case 12: c+=k[2]; b+=k[1]; a+=k[0]; break;
case 11: c+=((uint32_t)k8[10])<<8; /* fall through */
case 10: c+=((uint32_t)k8[9])<<16; /* fall through */
case 9 : c+=((uint32_t)k8[8])<<24; /* fall through */
case 8 : b+=k[1]; a+=k[0]; break;
case 7 : b+=((uint32_t)k8[6])<<8; /* fall through */
case 6 : b+=((uint32_t)k8[5])<<16; /* fall through */
case 5 : b+=((uint32_t)k8[4])<<24; /* fall through */
case 4 : a+=k[0]; break;
case 3 : a+=((uint32_t)k8[2])<<8; /* fall through */
case 2 : a+=((uint32_t)k8[1])<<16; /* fall through */
case 1 : a+=((uint32_t)k8[0])<<24; break;
case 0 : return c;
}
#endif /* !VALGRIND */
} else { /* need to read the key one byte at a time */
const uint8_t *k = (const uint8_t *)key;
/*--------------- all but the last block: affect some 32 bits of (a,b,c) */
while (length > 12)
{
a += ((uint32_t)k[0])<<24;
a += ((uint32_t)k[1])<<16;
a += ((uint32_t)k[2])<<8;
a += ((uint32_t)k[3]);
b += ((uint32_t)k[4])<<24;
b += ((uint32_t)k[5])<<16;
b += ((uint32_t)k[6])<<8;
b += ((uint32_t)k[7]);
c += ((uint32_t)k[8])<<24;
c += ((uint32_t)k[9])<<16;
c += ((uint32_t)k[10])<<8;
c += ((uint32_t)k[11]);
mix(a,b,c);
length -= 12;
k += 12;
}
/*-------------------------------- last block: affect all 32 bits of (c) */
switch(length) /* all the case statements fall through */
{
case 12: c+=k[11];
case 11: c+=((uint32_t)k[10])<<8;
case 10: c+=((uint32_t)k[9])<<16;
case 9 : c+=((uint32_t)k[8])<<24;
case 8 : b+=k[7];
case 7 : b+=((uint32_t)k[6])<<8;
case 6 : b+=((uint32_t)k[5])<<16;
case 5 : b+=((uint32_t)k[4])<<24;
case 4 : a+=k[3];
case 3 : a+=((uint32_t)k[2])<<8;
case 2 : a+=((uint32_t)k[1])<<16;
case 1 : a+=((uint32_t)k[0])<<24;
break;
case 0 : return c;
}
}
final(a,b,c);
return c;
}
#endif
#ifdef SELF_TEST
/* used for timings */
void driver1()
{
uint8_t buf[256];
uint32_t i;
uint32_t h=0;
time_t a,z;
time(&a);
for (i=0; i<256; ++i) buf[i] = 'x';
for (i=0; i<1; ++i)
{
h = hashlittle(&buf[0],1,h);
}
time(&z);
if (z-a > 0) printf("time %d %.8x\n", z-a, h);
}
/* check that every input bit changes every output bit half the time */
#define HASHSTATE 1
#define HASHLEN 1
#define MAXPAIR 60
#define MAXLEN 70
void driver2()
{
uint8_t qa[MAXLEN+1], qb[MAXLEN+2], *a = &qa[0], *b = &qb[1];
uint32_t c[HASHSTATE], d[HASHSTATE], i=0, j=0, k, l, m=0, z;
uint32_t e[HASHSTATE],f[HASHSTATE],g[HASHSTATE],h[HASHSTATE];
uint32_t x[HASHSTATE],y[HASHSTATE];
uint32_t hlen;
printf("No more than %d trials should ever be needed \n",MAXPAIR/2);
for (hlen=0; hlen < MAXLEN; ++hlen)
{
z=0;
for (i=0; i<hlen; ++i) /*----------------------- for each input byte, */
{
for (j=0; j<8; ++j) /*------------------------ for each input bit, */
{
for (m=1; m<8; ++m) /*------------ for serveral possible initvals, */
{
for (l=0; l<HASHSTATE; ++l)
e[l]=f[l]=g[l]=h[l]=x[l]=y[l]=~((uint32_t)0);
/*---- check that every output bit is affected by that input bit */
for (k=0; k<MAXPAIR; k+=2)
{
uint32_t finished=1;
/* keys have one bit different */
for (l=0; l<hlen+1; ++l) {a[l] = b[l] = (uint8_t)0;}
/* have a and b be two keys differing in only one bit */
a[i] ^= (k<<j);
a[i] ^= (k>>(8-j));
c[0] = hashlittle(a, hlen, m);
b[i] ^= ((k+1)<<j);
b[i] ^= ((k+1)>>(8-j));
d[0] = hashlittle(b, hlen, m);
/* check every bit is 1, 0, set, and not set at least once */
for (l=0; l<HASHSTATE; ++l)
{
e[l] &= (c[l]^d[l]);
f[l] &= ~(c[l]^d[l]);
g[l] &= c[l];
h[l] &= ~c[l];
x[l] &= d[l];
y[l] &= ~d[l];
if (e[l]|f[l]|g[l]|h[l]|x[l]|y[l]) finished=0;
}
if (finished) break;
}
if (k>z) z=k;
if (k==MAXPAIR)
{
printf("Some bit didn't change: ");
printf("%.8x %.8x %.8x %.8x %.8x %.8x ",
e[0],f[0],g[0],h[0],x[0],y[0]);
printf("i %d j %d m %d len %d\n", i, j, m, hlen);
}
if (z==MAXPAIR) goto done;
}
}
}
done:
if (z < MAXPAIR)
{
printf("Mix success %2d bytes %2d initvals ",i,m);
printf("required %d trials\n", z/2);
}
}
printf("\n");
}
/* Check for reading beyond the end of the buffer and alignment problems */
void driver3()
{
uint8_t buf[MAXLEN+20], *b;
uint32_t len;
uint8_t q[] = "This is the time for all good men to come to the aid of their country...";
uint32_t h;
uint8_t qq[] = "xThis is the time for all good men to come to the aid of their country...";
uint32_t i;
uint8_t qqq[] = "xxThis is the time for all good men to come to the aid of their country...";
uint32_t j;
uint8_t qqqq[] = "xxxThis is the time for all good men to come to the aid of their country...";
uint32_t ref,x,y;
uint8_t *p;
printf("Endianness. These lines should all be the same (for values filled in):\n");
printf("%.8x %.8x %.8x\n",
hashword((const uint32_t *)q, (sizeof(q)-1)/4, 13),
hashword((const uint32_t *)q, (sizeof(q)-5)/4, 13),
hashword((const uint32_t *)q, (sizeof(q)-9)/4, 13));
p = q;
printf("%.8x %.8x %.8x %.8x %.8x %.8x %.8x %.8x %.8x %.8x %.8x %.8x\n",
hashlittle(p, sizeof(q)-1, 13), hashlittle(p, sizeof(q)-2, 13),
hashlittle(p, sizeof(q)-3, 13), hashlittle(p, sizeof(q)-4, 13),
hashlittle(p, sizeof(q)-5, 13), hashlittle(p, sizeof(q)-6, 13),
hashlittle(p, sizeof(q)-7, 13), hashlittle(p, sizeof(q)-8, 13),
hashlittle(p, sizeof(q)-9, 13), hashlittle(p, sizeof(q)-10, 13),
hashlittle(p, sizeof(q)-11, 13), hashlittle(p, sizeof(q)-12, 13));
p = &qq[1];
printf("%.8x %.8x %.8x %.8x %.8x %.8x %.8x %.8x %.8x %.8x %.8x %.8x\n",
hashlittle(p, sizeof(q)-1, 13), hashlittle(p, sizeof(q)-2, 13),
hashlittle(p, sizeof(q)-3, 13), hashlittle(p, sizeof(q)-4, 13),
hashlittle(p, sizeof(q)-5, 13), hashlittle(p, sizeof(q)-6, 13),
hashlittle(p, sizeof(q)-7, 13), hashlittle(p, sizeof(q)-8, 13),
hashlittle(p, sizeof(q)-9, 13), hashlittle(p, sizeof(q)-10, 13),
hashlittle(p, sizeof(q)-11, 13), hashlittle(p, sizeof(q)-12, 13));
p = &qqq[2];
printf("%.8x %.8x %.8x %.8x %.8x %.8x %.8x %.8x %.8x %.8x %.8x %.8x\n",
hashlittle(p, sizeof(q)-1, 13), hashlittle(p, sizeof(q)-2, 13),
hashlittle(p, sizeof(q)-3, 13), hashlittle(p, sizeof(q)-4, 13),
hashlittle(p, sizeof(q)-5, 13), hashlittle(p, sizeof(q)-6, 13),
hashlittle(p, sizeof(q)-7, 13), hashlittle(p, sizeof(q)-8, 13),
hashlittle(p, sizeof(q)-9, 13), hashlittle(p, sizeof(q)-10, 13),
hashlittle(p, sizeof(q)-11, 13), hashlittle(p, sizeof(q)-12, 13));
p = &qqqq[3];
printf("%.8x %.8x %.8x %.8x %.8x %.8x %.8x %.8x %.8x %.8x %.8x %.8x\n",
hashlittle(p, sizeof(q)-1, 13), hashlittle(p, sizeof(q)-2, 13),
hashlittle(p, sizeof(q)-3, 13), hashlittle(p, sizeof(q)-4, 13),
hashlittle(p, sizeof(q)-5, 13), hashlittle(p, sizeof(q)-6, 13),
hashlittle(p, sizeof(q)-7, 13), hashlittle(p, sizeof(q)-8, 13),
hashlittle(p, sizeof(q)-9, 13), hashlittle(p, sizeof(q)-10, 13),
hashlittle(p, sizeof(q)-11, 13), hashlittle(p, sizeof(q)-12, 13));
printf("\n");
/* check that hashlittle2 and hashlittle produce the same results */
i=47; j=0;
hashlittle2(q, sizeof(q), &i, &j);
if (hashlittle(q, sizeof(q), 47) != i)
printf("hashlittle2 and hashlittle mismatch\n");
/* check that hashword2 and hashword produce the same results */
len = 0xdeadbeef;
i=47, j=0;
hashword2(&len, 1, &i, &j);
if (hashword(&len, 1, 47) != i)
printf("hashword2 and hashword mismatch %x %x\n",
i, hashword(&len, 1, 47));
/* check hashlittle doesn't read before or after the ends of the string */
for (h=0, b=buf+1; h<8; ++h, ++b)
{
for (i=0; i<MAXLEN; ++i)
{
len = i;
for (j=0; j<i; ++j) *(b+j)=0;
/* these should all be equal */
ref = hashlittle(b, len, (uint32_t)1);
*(b+i)=(uint8_t)~0;
*(b-1)=(uint8_t)~0;
x = hashlittle(b, len, (uint32_t)1);
y = hashlittle(b, len, (uint32_t)1);
if ((ref != x) || (ref != y))
{
printf("alignment error: %.8x %.8x %.8x %d %d\n",ref,x,y,
h, i);
}
}
}
}
/* check for problems with nulls */
void driver4()
{
uint8_t buf[1];
uint32_t h,i,state[HASHSTATE];
buf[0] = ~0;
for (i=0; i<HASHSTATE; ++i) state[i] = 1;
printf("These should all be different\n");
for (i=0, h=0; i<8; ++i)
{
h = hashlittle(buf, 0, h);
printf("%2ld 0-byte strings, hash is %.8x\n", i, h);
}
}
int main()
{
driver1(); /* test that the key is hashed: used for timings */
driver2(); /* test that whole key is hashed thoroughly */
driver3(); /* test that nothing but the key is hashed */
driver4(); /* test hashing multiple buffers (all buffers are null) */
return 1;
}
#endif /* SELF_TEST */

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/*
A C-program for MT19937, with initialization improved 2002/1/26.
Coded by Takuji Nishimura and Makoto Matsumoto.
Before using, initialize the state by using init_genrand(seed)
or init_by_array(init_key, key_length).
Copyright (C) 1997 - 2002, Makoto Matsumoto and Takuji Nishimura,
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
3. The names of its contributors may not be used to endorse or promote
products derived from this software without specific prior written
permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Any feedback is very welcome.
http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/emt.html
email: m-mat @ math.sci.hiroshima-u.ac.jp (remove space)
*/
#include <stdio.h>
/* Period parameters */
#define mtN 624
#define mtM 397
#define MATRIX_A 0x9908b0dfUL /* constant vector a */
#define UPPER_MASK 0x80000000UL /* most significant w-r bits */
#define LOWER_MASK 0x7fffffffUL /* least significant r bits */
static unsigned long mt[mtN]; /* the array for the state vector */
static int mti=mtN+1; /* mti==mtN+1 means mt[mtN] is not initialized */
/* initializes mt[mtN] with a seed */
void init_genrand(unsigned long s)
{
mt[0]= s & 0xffffffffUL;
for (mti=1; mti<mtN; mti++) {
mt[mti] =
(1812433253UL * (mt[mti-1] ^ (mt[mti-1] >> 30)) + mti);
/* See Knuth TAOCP Vol2. 3rd Ed. P.106 for multiplier. */
/* In the previous versions, MSBs of the seed affect */
/* only MSBs of the array mt[]. */
/* 2002/01/09 modified by Makoto Matsumoto */
mt[mti] &= 0xffffffffUL;
/* for >32 bit machines */
}
}
/* initialize by an array with array-length */
/* init_key is the array for initializing keys */
/* key_length is its length */
/* slight change for C++, 2004/2/26 */
void init_by_array(unsigned long init_key[], int key_length)
{
int i, j, k;
init_genrand(19650218UL);
i=1; j=0;
k = (mtN>key_length ? mtN : key_length);
for (; k; k--) {
mt[i] = (mt[i] ^ ((mt[i-1] ^ (mt[i-1] >> 30)) * 1664525UL))
+ init_key[j] + j; /* non linear */
mt[i] &= 0xffffffffUL; /* for WORDSIZE > 32 machines */
i++; j++;
if (i>=mtN) { mt[0] = mt[mtN-1]; i=1; }
if (j>=key_length) j=0;
}
for (k=mtN-1; k; k--) {
mt[i] = (mt[i] ^ ((mt[i-1] ^ (mt[i-1] >> 30)) * 1566083941UL))
- i; /* non linear */
mt[i] &= 0xffffffffUL; /* for WORDSIZE > 32 machines */
i++;
if (i>=mtN) { mt[0] = mt[mtN-1]; i=1; }
}
mt[0] = 0x80000000UL; /* MSB is 1; assuring non-zero initial array */
}
/* generates a random number on [0,0xffffffff]-interval */
unsigned long genrand_int32(void)
{
unsigned long y;
static unsigned long mag01[2]={0x0UL, MATRIX_A};
/* mag01[x] = x * MATRIX_A for x=0,1 */
if (mti >= mtN) { /* generate mtN words at one time */
int kk;
if (mti == mtN+1) /* if init_genrand() has not been called, */
init_genrand(5489UL); /* a default initial seed is used */
for (kk=0;kk<mtN-mtM;kk++) {
y = (mt[kk]&UPPER_MASK)|(mt[kk+1]&LOWER_MASK);
mt[kk] = mt[kk+mtM] ^ (y >> 1) ^ mag01[y & 0x1UL];
}
for (;kk<mtN-1;kk++) {
y = (mt[kk]&UPPER_MASK)|(mt[kk+1]&LOWER_MASK);
mt[kk] = mt[kk+(mtM-mtN)] ^ (y >> 1) ^ mag01[y & 0x1UL];
}
y = (mt[mtN-1]&UPPER_MASK)|(mt[0]&LOWER_MASK);
mt[mtN-1] = mt[mtM-1] ^ (y >> 1) ^ mag01[y & 0x1UL];
mti = 0;
}
y = mt[mti++];
/* Tempering */
y ^= (y >> 11);
y ^= (y << 7) & 0x9d2c5680UL;
y ^= (y << 15) & 0xefc60000UL;
y ^= (y >> 18);
return y;
}
#if 0
/* generates a random number on [0,0x7fffffff]-interval */
long genrand_int31(void)
{
return (long)(genrand_int32()>>1);
}
/* generates a random number on [0,1]-real-interval */
double genrand_real1(void)
{
return genrand_int32()*(1.0/4294967295.0);
/* divided by 2^32-1 */
}
/* generates a random number on [0,1)-real-interval */
double genrand_real2(void)
{
return genrand_int32()*(1.0/4294967296.0);
/* divided by 2^32 */
}
/* generates a random number on (0,1)-real-interval */
double genrand_real3(void)
{
return (((double)genrand_int32()) + 0.5)*(1.0/4294967296.0);
/* divided by 2^32 */
}
/* generates a random number on [0,1) with 53-bit resolution*/
double genrand_res53(void)
{
unsigned long a=genrand_int32()>>5, b=genrand_int32()>>6;
return(a*67108864.0+b)*(1.0/9007199254740992.0);
}
#endif
/* These real versions are due to Isaku Wada, 2002/01/09 added */
#if 0
int main(void)
{
int i;
unsigned long init[4]={0x123, 0x234, 0x345, 0x456}, length=4;
init_by_array(init, length);
printf("1000 outputs of genrand_int32()\n");
for (i=0; i<1000; i++) {
printf("%10lu ", genrand_int32());
if (i%5==4) printf("\n");
}
printf("\n1000 outputs of genrand_real2()\n");
for (i=0; i<1000; i++) {
printf("%10.8f ", genrand_real2());
if (i%5==4) printf("\n");
}
return 0;
}
#endif

44
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my c library (jlibc)
------------
* bytevector utilities: memswap, memreverse, swap_el, etc.
* hashing, random#s: int32hash, int64hash, int64to32hash, lookup3, ptrhash
* utf8
* bitvector
- iostream, socket, asynch io
- cross-platform pathnames, cwd, exename, date/time, etc.
* floating point number utils: comparison, print_real, print_cplx
- strtab (with prefix searching)
(- pool allocator with hooks for gc (sweep function))
(- list (dequeue))
(- sort: msort list, qsort numbers) not too important since stdlib has qsort
- use non-allocating APIs. this means the interface never allocates or
frees memory for you. you have to manage space for objects yourself.
- separate math library. includes numal, cephes, my complex number routines,
more special functions
stream redesign:
memstream, single-descriptor-backed, pipe (read/write on separate descriptors)
do our own buffering, so we can implement getline without seek/skip
all provided functions must be in terms of read,write,poll,flush only
seek/skip will be available, but only works on files and strings
change semantics of bit i/o so it doesn't require skip(-1)
compare our implementation to somebody else's fread,fwrite,etc.
cool trick for faking string streams with stdio:
char buf[256];
v = list2(number(6), number(4));
FILE *f = fopen("/dev/null", "a");
setbuffer(f, buf, sizeof(buf));
print(f, v, 0);
printf("got '%s'\n", buf);

316
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#include <limits.h>
#include <assert.h>
#include "dtypes.h"
#include "utils.h"
#include "ieee754.h"
// given a number, determine an appropriate type for storing it
#if 0
numerictype_t effective_numerictype(double r)
{
double fp;
fp = fpart(r);
if (fp != 0 || r > U64_MAX || r < S64_MIN) {
if (r > FLT_MAX || r < -FLT_MAX || (fabs(r) < FLT_MIN)) {
return T_DOUBLE;
}
else {
return T_FLOAT;
}
}
else if (r >= SCHAR_MIN && r <= SCHAR_MAX) {
return T_INT8;
}
else if (r >= SHRT_MIN && r <= SHRT_MAX) {
return T_INT16;
}
else if (r >= INT_MIN && r <= INT_MAX) {
return T_INT32;
}
else if (r <= S64_MAX) {
return T_INT64;
}
return T_UINT64;
}
#else
// simpler version implementing a smaller preferred type repertoire
numerictype_t effective_numerictype(double r)
{
double fp;
fp = fpart(r);
if (fp != 0 || r > U64_MAX || r < S64_MIN) {
return T_DOUBLE;
}
else if (r >= INT_MIN && r <= INT_MAX) {
return T_INT32;
}
else if (r <= S64_MAX) {
return T_INT64;
}
return T_UINT64;
}
#endif
double conv_to_double(void *data, numerictype_t tag)
{
double d=0;
switch (tag) {
case T_INT8: d = (double)*(int8_t*)data; break;
case T_UINT8: d = (double)*(uint8_t*)data; break;
case T_INT16: d = (double)*(int16_t*)data; break;
case T_UINT16: d = (double)*(uint16_t*)data; break;
case T_INT32: d = (double)*(int32_t*)data; break;
case T_UINT32: d = (double)*(uint32_t*)data; break;
case T_INT64:
d = (double)*(int64_t*)data;
if (d > 0 && *(int64_t*)data < 0) // can happen!
d = -d;
break;
case T_UINT64: d = (double)*(uint64_t*)data; break;
case T_FLOAT: d = (double)*(float*)data; break;
case T_DOUBLE: return *(double*)data;
}
return d;
}
void conv_from_double(void *dest, double d, numerictype_t tag)
{
switch (tag) {
case T_INT8: *(int8_t*)dest = d; break;
case T_UINT8: *(uint8_t*)dest = d; break;
case T_INT16: *(int16_t*)dest = d; break;
case T_UINT16: *(uint16_t*)dest = d; break;
case T_INT32: *(int32_t*)dest = d; break;
case T_UINT32: *(uint32_t*)dest = d; break;
case T_INT64:
*(int64_t*)dest = d;
if (d > 0 && *(int64_t*)dest < 0) // 0x8000000000000000 is a bitch
*(int64_t*)dest = S64_MAX;
break;
case T_UINT64: *(uint64_t*)dest = d; break;
case T_FLOAT: *(float*)dest = d; break;
case T_DOUBLE: *(double*)dest = d; break;
}
}
#define CONV_TO_INTTYPE(type) \
type##_t conv_to_##type(void *data, numerictype_t tag) \
{ \
type##_t i=0; \
switch (tag) { \
case T_INT8: i = (type##_t)*(int8_t*)data; break; \
case T_UINT8: i = (type##_t)*(uint8_t*)data; break; \
case T_INT16: i = (type##_t)*(int16_t*)data; break; \
case T_UINT16: i = (type##_t)*(uint16_t*)data; break; \
case T_INT32: i = (type##_t)*(int32_t*)data; break; \
case T_UINT32: i = (type##_t)*(uint32_t*)data; break; \
case T_INT64: i = (type##_t)*(int64_t*)data; break; \
case T_UINT64: i = (type##_t)*(uint64_t*)data; break; \
case T_FLOAT: i = (type##_t)*(float*)data; break; \
case T_DOUBLE: i = (type##_t)*(double*)data; break; \
} \
return i; \
}
CONV_TO_INTTYPE(int64)
CONV_TO_INTTYPE(uint64)
CONV_TO_INTTYPE(int32)
CONV_TO_INTTYPE(uint32)
int cmp_same_lt(void *a, void *b, numerictype_t tag)
{
switch (tag) {
case T_INT8: return *(int8_t*)a < *(int8_t*)b;
case T_UINT8: return *(uint8_t*)a < *(uint8_t*)b;
case T_INT16: return *(int16_t*)a < *(int16_t*)b;
case T_UINT16: return *(uint16_t*)a < *(uint16_t*)b;
case T_INT32: return *(int32_t*)a < *(int32_t*)b;
case T_UINT32: return *(uint32_t*)a < *(uint32_t*)b;
case T_INT64: return *(int64_t*)a < *(int64_t*)b;
case T_UINT64: return *(uint64_t*)a < *(uint64_t*)b;
case T_FLOAT: return *(float*)a < *(float*)b;
case T_DOUBLE: return *(double*)a < *(double*)b;
}
return 0;
}
int cmp_same_eq(void *a, void *b, numerictype_t tag)
{
switch (tag) {
case T_INT8: return *(int8_t*)a == *(int8_t*)b;
case T_UINT8: return *(uint8_t*)a == *(uint8_t*)b;
case T_INT16: return *(int16_t*)a == *(int16_t*)b;
case T_UINT16: return *(uint16_t*)a == *(uint16_t*)b;
case T_INT32: return *(int32_t*)a == *(int32_t*)b;
case T_UINT32: return *(uint32_t*)a == *(uint32_t*)b;
case T_INT64: return *(int64_t*)a == *(int64_t*)b;
case T_UINT64: return *(uint64_t*)a == *(uint64_t*)b;
case T_FLOAT: return flt_equals(*(float*)a, *(float*)b);
case T_DOUBLE: return dbl_equals(*(double*)a, *(double*)b);
}
return 0;
}
int cmp_lt(void *a, numerictype_t atag, void *b, numerictype_t btag)
{
if (atag==btag)
return cmp_same_lt(a, b, atag);
double da = conv_to_double(a, atag);
double db = conv_to_double(b, btag);
// casting to double will only get the wrong answer for big int64s
// that differ in low bits
if (da < db)
return 1;
if (db < da)
return 0;
if (atag == T_UINT64) {
// this is safe because if a had been bigger than S64_MAX,
// we would already have concluded that it's bigger than b.
if (btag == T_INT64) {
return ((int64_t)*(uint64_t*)a < *(int64_t*)b);
}
else if (btag == T_DOUBLE) {
return (*(uint64_t*)a < (uint64_t)*(double*)b);
}
}
else if (atag == T_INT64) {
if (btag == T_UINT64) {
return (*(int64_t*)a < (int64_t)*(uint64_t*)b);
}
else if (btag == T_DOUBLE) {
return (*(int64_t*)a < (int64_t)*(double*)b);
}
}
else if (btag == T_UINT64) {
if (atag == T_INT64) {
return ((int64_t)*(uint64_t*)b > *(int64_t*)a);
}
else if (atag == T_DOUBLE) {
return (*(uint64_t*)b > (uint64_t)*(double*)a);
}
}
else if (btag == T_INT64) {
if (atag == T_UINT64) {
return (*(int64_t*)b > (int64_t)*(uint64_t*)a);
}
else if (atag == T_DOUBLE) {
return (*(int64_t*)b > (int64_t)*(double*)a);
}
}
return 0;
}
int cmp_eq(void *a, numerictype_t atag, void *b, numerictype_t btag)
{
if (atag==btag)
return cmp_same_eq(a, b, atag);
double da = conv_to_double(a, atag);
double db = conv_to_double(b, btag);
if ((int)atag >= T_FLOAT && (int)btag >= T_FLOAT)
return dbl_equals(da, db);
if (da != db)
return 0;
if (atag == T_UINT64) {
// this is safe because if a had been bigger than S64_MAX,
// we would already have concluded that it's bigger than b.
if (btag == T_INT64) {
return ((int64_t)*(uint64_t*)a == *(int64_t*)b);
}
else if (btag == T_DOUBLE) {
return (*(uint64_t*)a == (uint64_t)*(double*)b);
}
}
else if (atag == T_INT64) {
if (btag == T_UINT64) {
return (*(int64_t*)a == (int64_t)*(uint64_t*)b);
}
else if (btag == T_DOUBLE) {
return (*(int64_t*)a == (int64_t)*(double*)b);
}
}
else if (btag == T_UINT64) {
if (atag == T_INT64) {
return ((int64_t)*(uint64_t*)b == *(int64_t*)a);
}
else if (atag == T_DOUBLE) {
return (*(uint64_t*)b == (uint64_t)*(double*)a);
}
}
else if (btag == T_INT64) {
if (atag == T_UINT64) {
return (*(int64_t*)b == (int64_t)*(uint64_t*)a);
}
else if (atag == T_DOUBLE) {
return (*(int64_t*)b == (int64_t)*(double*)a);
}
}
return 1;
}
#ifdef ENABLE_LLT_TEST
void test_operators()
{
int8_t i8, i8b;
uint8_t ui8, ui8b;
int16_t i16, i16b;
uint16_t ui16, ui16b;
int32_t i32, i32b;
uint32_t ui32, ui32b;
int64_t i64, i64b;
uint64_t ui64, ui64b;
float f, fb;
double d, db;
ui64 = U64_MAX;
ui64b = U64_MAX-1;
i64 = S64_MIN;
i64b = i64+1;
d = (double)ui64;
db = (double)i64b;
assert(cmp_lt(&i64, T_INT64, &ui64, T_UINT64));
assert(!cmp_lt(&ui64, T_UINT64, &i64, T_INT64));
assert(cmp_lt(&i64, T_INT64, &ui64b, T_UINT64));
assert(!cmp_lt(&ui64b, T_UINT64, &i64, T_INT64));
assert(cmp_lt(&i64, T_INT64, &i64b, T_INT64));
assert(!cmp_lt(&i64b, T_INT64, &i64, T_INT64));
// try to compare a double too big to fit in an int64 with an
// int64 requiring too much precision to fit in a double...
// this case fails but it's very difficult/expensive to support
//assert(cmp_lt(&ui64b, T_UINT64, &d, T_DOUBLE));
i64 = S64_MAX;
ui64 = S64_MAX-1;
assert(cmp_lt(&ui64, T_UINT64, &i64, T_INT64));
assert(!cmp_lt(&i64, T_INT64, &ui64, T_UINT64));
i64 = S64_MAX-1;
ui64 = S64_MAX;
assert(cmp_lt(&i64, T_INT64, &ui64, T_UINT64));
assert(!cmp_lt(&ui64, T_UINT64, &i64, T_INT64));
d = DBL_MAXINT;
i64 = DBL_MAXINT+100;
assert(cmp_lt(&d, T_DOUBLE, &i64, T_INT64));
assert(!cmp_lt(&i64, T_INT64, &d, T_DOUBLE));
i64 = DBL_MAXINT+10;
assert(cmp_lt(&d, T_DOUBLE, &i64, T_INT64));
assert(!cmp_lt(&i64, T_INT64, &d, T_DOUBLE));
i64 = DBL_MAXINT+1;
assert(cmp_lt(&d, T_DOUBLE, &i64, T_INT64));
assert(!cmp_lt(&i64, T_INT64, &d, T_DOUBLE));
assert(!cmp_eq(&d, T_DOUBLE, &i64, T_INT64));
i64 = DBL_MAXINT;
assert(cmp_eq(&d, T_DOUBLE, &i64, T_INT64));
}
#endif

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/*
pointer hash table
optimized for storing info about particular values
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include <limits.h>
#include "dtypes.h"
#include "ptrhash.h"
#include "hashing.h"
#define ptrhash_size(h) ((h)->size/2)
ptrhash_t *ptrhash_new(ptrhash_t *h, size_t size)
{
size = nextipow2(size);
size *= 2; // 2 pointers per key/value pair
size *= 2; // aim for 50% occupancy
h->size = size;
h->table = (void**)malloc(size*sizeof(void*));
if (h->table == NULL) return NULL;
size_t i;
for(i=0; i < size; i++)
h->table[i] = PH_NOTFOUND;
return h;
}
void ptrhash_free(ptrhash_t *h)
{
free(h->table);
}
// empty and reduce size
void ptrhash_reset(ptrhash_t *h, size_t sz)
{
if (h->size > sz*4) {
size_t newsz = sz*4;
void **newtab = (void**)realloc(h->table, newsz*sizeof(void*));
if (newtab == NULL)
return;
h->size = newsz;
h->table = newtab;
}
size_t i, hsz=h->size;
for(i=0; i < hsz; i++)
h->table[i] = PH_NOTFOUND;
}
// compute empirical max-probe for a given size
#define ph_max_probe(size) ((size)>>5)
static void **ptrhash_lookup_bp(ptrhash_t *h, void *key)
{
uint_t hv;
size_t i, orig, index, iter;
size_t newsz, sz = ptrhash_size(h);
size_t maxprobe = ph_max_probe(sz);
void **tab = h->table;
void **ol;
hv = inthash((uptrint_t)key);
retry_bp:
iter = 0;
index = (index_t)(hv & (sz-1)) * 2;
sz *= 2;
orig = index;
do {
if (tab[index] == PH_NOTFOUND) {
tab[index] = key;
return &tab[index+1];
}
if (key == tab[index])
return &tab[index+1];
index = (index+2) & (sz-1);
iter++;
if (iter > maxprobe)
break;
} while (index != orig);
// table full
// quadruple size, rehash, retry the insert
// it's important to grow the table really fast; otherwise we waste
// lots of time rehashing all the keys over and over.
sz = h->size;
ol = h->table;
if (sz >= (1<<19))
newsz = sz<<1;
else
newsz = sz<<2;
//printf("trying to allocate %d words.\n", newsz); fflush(stdout);
tab = (void**)malloc(newsz*sizeof(void*));
if (tab == NULL)
return NULL;
for(i=0; i < newsz; i++)
tab[i] = PH_NOTFOUND;
h->table = tab;
h->size = newsz;
for(i=0; i < sz; i+=2) {
if (ol[i] != PH_NOTFOUND && ol[i+1] != PH_NOTFOUND) {
(*ptrhash_lookup_bp(h, ol[i])) = ol[i+1];
/*
// this condition is not really possible
if (bp == NULL) {
free(h->table);
h->table = ol;
h->size = sz;
// another thing we could do in this situation
// is newsz<<=1 and go back to the malloc, retrying with
// a bigger buffer on this level of recursion.
return NULL;
}
*/
}
}
free(ol);
sz = ptrhash_size(h);
maxprobe = ph_max_probe(sz);
goto retry_bp;
return NULL;
}
void ptrhash_put(ptrhash_t *h, void *key, void *val)
{
void **bp = ptrhash_lookup_bp(h, key);
*bp = val;
}
void **ptrhash_bp(ptrhash_t *h, void *key)
{
return ptrhash_lookup_bp(h, key);
}
// returns bp if key is in hash, otherwise NULL
static void **ptrhash_peek_bp(ptrhash_t *h, void *key)
{
size_t sz = ptrhash_size(h);
size_t maxprobe = ph_max_probe(sz);
void **tab = h->table;
size_t index = (index_t)(inthash((uptrint_t)key) & (sz-1)) * 2;
sz *= 2;
size_t orig = index;
size_t iter = 0;
do {
if (tab[index] == PH_NOTFOUND)
return NULL;
if (key == tab[index] && tab[index+1] != PH_NOTFOUND)
return &tab[index+1];
index = (index+2) & (sz-1);
iter++;
if (iter > maxprobe)
break;
} while (index != orig);
return NULL;
}
void *ptrhash_get(ptrhash_t *h, void *key)
{
void **bp = ptrhash_peek_bp(h, key);
if (bp == NULL)
return PH_NOTFOUND;
return *bp;
}
int ptrhash_has(ptrhash_t *h, void *key)
{
return (ptrhash_get(h,key) != PH_NOTFOUND);
}
void ptrhash_remove(ptrhash_t *h, void *key)
{
void **bp = ptrhash_peek_bp(h, key);
if (bp != NULL)
*bp = PH_NOTFOUND;
}
void ptrhash_adjoin(ptrhash_t *h, void *key, void *val)
{
void **bp = ptrhash_lookup_bp(h, key);
if (*bp == PH_NOTFOUND)
*bp = val;
}

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#ifndef __PTRHASH_H_
#define __PTRHASH_H_
typedef struct _ptrhash_t {
size_t size;
void **table;
} ptrhash_t;
// define this to be an invalid key/value
#define PH_NOTFOUND ((void*)2)
// initialize and free
ptrhash_t *ptrhash_new(ptrhash_t *h, size_t size);
void ptrhash_free(ptrhash_t *h);
// clear and (possibly) change size
void ptrhash_reset(ptrhash_t *h, size_t sz);
// return value, or PH_NOTFOUND if key not found
void *ptrhash_get(ptrhash_t *h, void *key);
// add key/value binding
void ptrhash_put(ptrhash_t *h, void *key, void *val);
// add binding iff key is unbound
void ptrhash_adjoin(ptrhash_t *h, void *key, void *val);
// does key exist?
int ptrhash_has(ptrhash_t *h, void *key);
// logically remove key
void ptrhash_remove(ptrhash_t *h, void *key);
// get a pointer to the location of the value for the given key.
// creates the location if it doesn't exist. only returns NULL
// if memory allocation fails.
// this should be used for updates, for example:
// void **bp = ptrhash_bp(h, key);
// *bp = f(*bp);
// do not reuse bp if there might be intervening calls to ptrhash_put,
// ptrhash_bp, ptrhash_reset, or ptrhash_free.
void **ptrhash_bp(ptrhash_t *h, void *key);
#endif

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/* null stream */
off_t null_seek(struct _stream *s, off_t where)
{
return -1;
}
off_t null_skip(struct _stream *s, off_t offs)
{
return 0;
}
off_t null_seek_end(struct _stream *s)
{
return -1;
}
size_t null_read(struct _stream *s, char *dest, size_t size)
{
return 0;
}
size_t null_write(struct _stream *s, char *data, size_t size)
{
return 0;
}
size_t null_trunc(struct _stream *s, size_t size)
{
return 0;
}
void null_flush(struct _stream *s)
{
}
bool_t null_eof(struct _stream *s)
{
return true;
}
void free_null_stream(stream_t *s)
{
}
DLLEXPORT stream_interface_t null_funcs =
{free_null_stream, null_seek, null_seek_end, null_skip,
null_read, null_write, null_trunc, null_eof, null_flush};
stream_t *nullstream_new()
{
stream_t *s;
s = (stream_t*)obj_alloc(stream_pool);
s->funcs = &null_funcs;
s->byteswap = false;
s->bitpos = s->bitbuf = 0;
s->pos = 0;
return s;
}
void free_roms_stream(stream_t *s)
{
(void)s;
}
size_t roms_write(struct _stream *s, char *data, size_t size)
{
(void)s;
(void)data;
(void)size;
return 0;
}
size_t roms_trunc(struct _stream *s, size_t size)
{
(void)size;
return s->size;
}
void roms_flush(struct _stream *s)
{
s->bitpos = 0;
}
stream_interface_t roms_funcs =
{free_roms_stream, ms_seek, ms_seek_end, ms_skip,
ms_read, roms_write, roms_trunc, ms_eof, roms_flush};
/* read-only memory stream */
stream_t *romemstream_new(stream_t *s, char *data, size_t len)
{
memstream_new(s, 0);
s->funcs = &roms_funcs;
s->data = data;
s->size = len;
s->maxsize = len+1;
s->pos = 0;
s->bitpos = s->bitbuf = 0;
s->byteswap = false;
return s;
}
int stream_vput_int(stream_t *s, int nargs, ...)
{
u_int32_t val, i, c=0;
va_list ap;
va_start(ap, nargs);
for(i=0; i < (unsigned)nargs; i++) {
val = va_arg(ap, int);
c += stream_put_int(s, val);
}
va_end(ap);
return c;
}
// after this function you are guaranteed to be able to perform
// operations of the kind requested.
static int _ios_setstate(ios_t *s, iostate_t newstate)
{
if (s->state != newstate) {
if (s->state == iost_none || s->bm == bm_mem || s->bm == bm_none) {
}
else if (s->state == iost_rd) {
// reading -> writing; try to put back unused buffer data
// todo: another possibility here is to seek back s->size bytes,
// not move any data, and retain the ability to seek backwards
// within the buffer. the downside to that would be redundant
// writes of stuff that was already in the file.
ios_skip(s, -(off_t)(s->size - s->bpos));
// todo: if the seek fails...?
_discard_partial_buffer(s);
// note: bitpos is left alone, so if all goes well we pick up
// writing exactly where we stopped reading.
}
else if (s->state == iost_wr) {
ios_flush(s);
}
s->state = newstate;
}
// now make sure buffer is set up for the state we're in
if (s->state == iost_wr) {
// TODO: fill buffer if stenciling is requested
}
else if (s->state == iost_rd) {
// TODO: fill buffer if needed
}
return 0;
}
/* convert double to int64 in software */
int64_t double_to_int64(double d)
{
int64_t i;
int ex;
union ieee754_double dl;
if (fabs(d) < 1) return 0;
dl.d = d;
ex = dl.ieee.exponent - IEEE754_DOUBLE_BIAS;
// fill mantissa into bits 0 to 51
i = ((((int64_t)dl.mantissa0)<<32) | ((int64_t)dl.mantissa1));
if (ex < 52)
i >>= (52-ex);
else if (ex > 52)
i <<= (ex-52);
}

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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <assert.h>
#include <errno.h>
#include "dtypes.h"
#include "socket.h"
int mysocket(int domain, int type, int protocol)
{
int val;
int s = socket(domain, type, protocol);
if (s < 0)
return s;
val = 4096;
setsockopt(s, SOL_SOCKET, SO_RCVBUF, (char*)&val, sizeof(int));
val = 4096;
setsockopt(s, SOL_SOCKET, SO_SNDBUF, (char*)&val, sizeof(int));
return s;
}
#ifdef WIN32
void bzero(void *s, size_t n)
{
memset(s, 0, n);
}
#endif
/* returns a socket on which to accept() connections */
int open_tcp_port(short portno)
{
int sockfd;
struct sockaddr_in serv_addr;
sockfd = mysocket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
if (sockfd < 0)
return -1;
bzero(&serv_addr, sizeof(serv_addr));
serv_addr.sin_family = AF_INET;
serv_addr.sin_addr.s_addr = htonl(INADDR_ANY);
serv_addr.sin_port = htons(portno);
if (bind(sockfd, (struct sockaddr*)&serv_addr, sizeof(serv_addr)) < 0) {
fprintf(stderr, "could not bind to port %d.\n",
portno);
return -1;
}
listen(sockfd, 4);
return sockfd;
}
/* returns a socket on which to accept() connections, finding some
available port (portno is value-return) */
int open_any_tcp_port(short *portno)
{
int sockfd;
struct sockaddr_in serv_addr;
sockfd = mysocket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
if (sockfd < 0)
return -1;
bzero(&serv_addr, sizeof(serv_addr));
serv_addr.sin_family = AF_INET;
serv_addr.sin_addr.s_addr = htonl(INADDR_ANY);
serv_addr.sin_port = htons(*portno);
while (bind(sockfd, (struct sockaddr*)&serv_addr, sizeof(serv_addr)) < 0) {
(*portno)++;
serv_addr.sin_port = htons(*portno);
}
listen(sockfd, 4);
return sockfd;
}
/* returns a socket on which to accept() connections, finding some
available port (portno is value-return) */
int open_any_udp_port(short *portno)
{
int sockfd;
struct sockaddr_in serv_addr;
sockfd = mysocket(PF_INET, SOCK_DGRAM, IPPROTO_TCP);
if (sockfd < 0)
return -1;
bzero(&serv_addr, sizeof(serv_addr));
serv_addr.sin_family = AF_INET;
serv_addr.sin_addr.s_addr = htonl(INADDR_ANY);
serv_addr.sin_port = htons(*portno);
while (bind(sockfd, (struct sockaddr*)&serv_addr, sizeof(serv_addr)) < 0) {
(*portno)++;
serv_addr.sin_port = htons(*portno);
}
return sockfd;
}
#ifndef WIN32
void closesocket(int fd)
{
close(fd);
}
#endif
/* returns a socket to use to send data to the given address */
int connect_to_host(char *hostname, short portno)
{
struct hostent *host_info;
int sockfd, yes=1;
struct sockaddr_in host_addr;
host_info = gethostbyname(hostname);
if (host_info == NULL) {
return -1;
}
sockfd = mysocket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (sockfd < 0) {
return -1;
}
(void)setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(int));
memset((char*)&host_addr, 0, sizeof(host_addr));
host_addr.sin_family = host_info->h_addrtype;
memcpy((char*)&host_addr.sin_addr, host_info->h_addr,
host_info->h_length);
host_addr.sin_port = htons(portno);
if (connect(sockfd, (struct sockaddr*)&host_addr,
sizeof(struct sockaddr_in)) != 0) {
closesocket(sockfd);
return -1;
}
return sockfd;
}
int connect_to_addr(struct sockaddr_in *host_addr)
{
int sockfd, yes=1;
sockfd = mysocket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (sockfd < 0) {
return -1;
}
(void)setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(int));
if (connect(sockfd, (struct sockaddr*)host_addr,
sizeof(struct sockaddr_in)) != 0) {
closesocket(sockfd);
return -1;
}
return sockfd;
}
/* repeated send until all of buffer is sent */
int sendall(int sockfd, char *buffer, int bufLen, int flags)
{
int numBytesToSend=bufLen, length;
while (numBytesToSend>0) {
length = send(sockfd, (void *) buffer, numBytesToSend, flags);
if (length < 0) {
return(-1);
}
numBytesToSend -= length ;
buffer += length ;
}
return(bufLen);
}
/* repeated read until all of buffer is read */
int readall(int sockfd, char *buffer, int bufLen, int flags)
{
int numBytesToRead=bufLen, length;
while (numBytesToRead>0) {
length = recv(sockfd, buffer, numBytesToRead, flags);
if (length <= 0) {
return(length);
}
numBytesToRead -= length;
buffer += length;
}
return(bufLen);
}
int addr_eq(struct sockaddr_in *a, struct sockaddr_in *b)
{
if (a->sin_port == b->sin_port &&
a->sin_addr.s_addr == b->sin_addr.s_addr)
return 1;
return 0;
}
int socket_ready(int sock)
{
fd_set fds;
struct timeval timeout;
timeout.tv_sec = 0;
timeout.tv_usec = 1000;
FD_ZERO(&fds);
FD_SET(sock, &fds);
select(sock+1, &fds, NULL, NULL, &timeout);
return FD_ISSET(sock, &fds);
}

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#ifndef __JCSOCKET_H_
#define __JCSOCKET_H_
#ifdef WIN32
#include <winsock2.h>
#else
#include <netinet/in.h>
#include <netdb.h>
#include <sys/types.h>
#include <sys/socket.h>
#endif
int open_tcp_port(short portno);
int open_any_tcp_port(short *portno);
int open_any_udp_port(short *portno);
int connect_to_host(char *hostname, short portno);
int connect_to_addr(struct sockaddr_in *host_addr);
int sendall(int sockfd, char *buffer, int bufLen, int flags);
int readall(int sockfd, char *buffer, int bufLen, int flags);
int addr_eq(struct sockaddr_in *a, struct sockaddr_in *b);
int socket_ready(int sock);
#ifdef WIN32
void bzero(void *s, size_t n);
#endif
#ifndef WIN32
void closesocket(int fd);
#endif
#endif

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function varargout = textread(filename, format, varargin)
% textread Formatted file read to one or more variables
%
% Syntax:
% [<variable-1> <<,variable-2>> <<,variable-N>> ] = ...
% textread( <input-filename>, <format-specifiers> <<,number-of-lines-to-read>> )
%
% This function is available for task parallel processing.
%
% ************
%
% The Star-P M implementation of this function exhibits the same signature and output characteristics as the Matlab
% function of the same name.
%
% For details, please see matlab:textread.
%
% ************************
%
%
% DOC % A
if nargin < 2, error('Not enough input arguments.'); end
if ~ischar(filename), error('Filename must be a string.'); end
ifExist = exist(filename, 'file');
if ifExist ~= 2 && ifExist ~= 4, error('File not found'); end
fid = fopen(filename, 'r');
if fid == -1, error(lasterror()); end;
formatin = formatread(format);
argin = readvarargin(varargin{:});
% Проверка количества исходящих аргументов
count = 0;
for k = 1:length(formatin),
if ~isequal(formatin(k).symbol, '*'), count = count + 1; end;
end
if count ~= nargout, error('widthber of outputs must match the widthber of unskipped input fields.');end
% Флаг flag_N - опредиляет сколько раз использовать строку формата
% (N или пока не считаем весь файл)
flag_N = 1;
if ~isempty(argin.N)
N = argin.N;
else
N = 1; flag_N = 0;
end
% Пропустить первые N == headerlines линий
for i = 1:argin.headerlines
text = fgets(fid);
end
% Если строка пустая считать следующую
text = fgets(fid);
t = 1;
k = 1;
maxlen = 1;
vararginEmpty = 1;
while N
t = 1;
if ~isempty(format)
if passLine(text, argin)
for j = 1:length(formatin)
s = formatin(j);
if s.type == 'c' && isempty(text)
while 1
text = fgets(fid);
if ~ischar(text)
fclose(fid);
return;
else
if ~(text(1) == 13)
break;
end
end
end
end
% Удалить первые лишние пробелы
text = removeAllFirstSpaces(text, argin.delimiter);
% Считать следующее слово указанного типа
[out, text] = switchType(text, s, argin, fid);
% Пропустить слово если установлен параметр *
if ~isequal(s.symbol, '*')
if ~isempty(text) || ~(isempty(out) || isequal(out, {''}))
out = setEmptyValue(out, s, argin);
if vararginEmpty
varargout{t}(1, :) = out;
else
varargout{t}(end + 1, :) = out;
end
end
t = t + 1;
end;
% Убрать первый символ если он равен delimiter
if ~isempty(argin.delimiter) && ~isempty(text) && isa(text, 'char')
if find(argin.delimiter == text(1))
text = text(2:end);
end
end;
end
vararginEmpty = 0;
end
else % Если строка формата не задана читать как double
if passLine(text, argin)
[out, text] = readDoubleArray(text, argin);
curmaxlen = maxlen;
if length(out) > maxlen, maxlen = length(out); end;
for z = 1:k
for q = curmaxlen+1:maxlen
varargout{1}(z, q) = argin.emptyvalue;
end
end
for q = length(out)+1:maxlen
out(q) = argin.emptyvalue;
end
varargout{1}(k, :) = out;
k = k + 1;
end
end
text = removeAllFirstSpaces(text, argin.delimiter);
% Если строка пустая считать следующую
if isempty(text)
text = fgets(fid);
elseif find(text(1) == [10 13])
text = fgets(fid);
end
% Выйти если не смогли считать строку
if ~ischar(text), break; end;
if flag_N, N = N - 1; end;
end
fclose(fid);
end
% -------- Работа с текстом ---------------------------
% Удаляет все первые разделители
function text = removeAllFirstSpaces(text, delimiter)
%if ~isempty(delimiter), return; end;
idx = [];
for k = 1:length(text)
idx = find(text(k) ~= ' ', 1);
if ~isempty(idx), break; end;
end
if ~isempty(idx)
text = text(k:end);
else
text = '';
end
end
% Читает первые n - символов
function [word, text] = readCharacters(text, n, fid)
word = '';
while n
if n > length(text)
word = [word text(1:end)];
n = n - length(text);
text = fgets(fid);
if ~ischar(text), error(sprintf('Trouble reading characters from file: %s', text)); end
else
word = [word text(1:n)];
text = text(n+1:end);
n = 0;
end
end
end
% Читает первое слово до разделитель или первые n - символов
function [word, text] = readString(text, n, delimiter)
if isempty(delimiter), delimiter = [13, 10, 32];
else
delimiter = [delimiter, 13, 10];
end
word = '';
if isempty(n) || n > length(text) , n = length(text); end;
for k = 1:n
if find(delimiter == text(k))
word = text(1:k-1);
text = text(k:end);
return;
end
end
word = text(1:k);
text = text(k+1:end);
end
% Читает первые числа до разделителяили или первые n - символов
function [word, text] = readNumber(text, n)
if isempty(text), word = ''; end;
word = [];
if isempty(n) || length(text) < n, n = length(text); end;
for k = 1:n
if text(k) < 48 || text(k) > 57
word = text(1:k-1);
text = text(k:end);
return;
end
end
word = text(1:k);
text = text(k+1:end);
end
% Читает число с точкой до разделителяили или первые n - символов
function [word, text] = readFloat(text, s)
if isempty(text), word = ''; return; end;
if isempty(s), s.width = []; s.precision = []; end;
if isempty(s.width) || length(text) < s.width
n = length(text);
else
n = s.width;
end;
if isempty(s.precision), s.precision = n; end;
% Чтение знака
[sign, text] = getSign(text);
if ~isempty(sign), n = n - 1; end;
point = 0;
npoint = 0;
word = sign;
for k = 1:n
if point
npoint = npoint + 1;
end
if text(k) == '.' && ~point
point = 1;
continue;
end
if text(k) < 48 || text(k) > 57 || npoint > s.precision
word = [word text(1:k-1)];
text = text(k:end);
return;
end
end
word = [word text(1:k)];
text = text(k+1:end);
end
% Определяет знак
function [sign, text] = getSign(text)
if isempty(text), sign = ''; return; end;
if text(1) == '+' || text(1) == '-'
sign = text(1);
text = text(2:end);
if isempty(text) || text(1) < 48 || text(1) > 57, error(sprintf('Trouble reading double from file: %s', text)); end;
else
sign = [];
end
end
% 0 - пропустить строку, 1 - обрабатывать
function out = passLine(text, argin)
isdelimiter = 0;
if argin.delimiter
if ~isempty(find(text == argin.delimiter, 1))
isdelimiter = 1;
end
end
isnewline = 0;
if ~isempty(find(text(1) == [10 13], 1))
isnewline = 1;
end
if ~isnewline || isdelimiter
out = 1;
else
out = 0;
end
end
% -------- Парс входящих параметров ---------------------------
% Читает входящие параметры в структуру
function argin = readvarargin(varargin)
argin = struct();
argin(1).N = [];
argin(1).bufsize = 4095;
argin(1).commentstyle = [];
argin(1).delimiter = '';
argin(1).emptyvalue = 0;
argin(1).endofline = [];
argin(1).expchars = [];
argin(1).headerlines = 0;
argin(1).whitespace = [];
if nargin == 0, return; end;
k = 1;
if isnumeric(varargin{1})
argin.N = varargin{1};
k = k + 1;
end
count = (length(varargin(k:end)) / 2);
if floor(count) - count ~= 0, error('Param/value pairs must come in pairs'); end;
while k < nargin
switch varargin{k}
case 'bufsize'
k = k + 1;
if isinteger(varargin{k}) && isscalar(varargin{k})
argin(1).bufsize = str2double(varargin{k});
else
error('Buffer size must be a scalar integer.');
end
case 'commentstyle'
k = k + 1;
switch varargin{k}
case 'matlab'
argin(1).commentstyle = '%';
case 'shell'
argin(1).commentstyle = '#';
case 'c++'
argin(1).commentstyle = '//';
otherwise
error('Invalid comment style.');
end
case 'delimiter'
k = k + 1;
switch varargin{k}
case '\n'
num = 10;
case '\r'
num = 13;
otherwise
num = double(varargin{k});
end
argin(1).delimiter = num;
case 'emptyvalue'
k = k + 1;
if isnumeric(varargin{k}) && isscalar(varargin{k})
argin(1).emptyvalue = varargin{k};
else
error('Emptyvalue must be a scalar double.');
end
case 'endofline'
k = k + 1;
if ischar(varargin{k})
argin(1).endofline = varargin{k};
else
error('endofline must be a scalar double.');
end
case 'expchars'
case 'headerlines'
k = k + 1;
if isnumeric(varargin{k}) && isscalar(varargin{k})
argin(1).headerlines = varargin{k};
else
error('Headerlines must be a scalar integer.');
end
case 'whitespace'
otherwise
error('Unknown option');
end
k = k + 1;
end
end
% Читает строку формата в структуру
function R = formatread(format)
formatType = ['d', 'u', 'f', 's', 'q', 'c'];
k = 1;
t = 1;
s = struct();
s(t).type = [];
s(t).width = [];
s(t).precision = [];
s(t).symbol = [];
s(t).text = [];
while ~isempty(format)
type = [];
width = [];
precision = [];
symbol = [];
text = [];
format = removeAllFirstSpaces(format, '');
if format(1) == '%'
format = format(2:end);
if format(1) == '*'
symbol = '*';
format = format(2:end);
end;
[width, format] = readNumber(format, []);
if format(1) == '.'
format = format(2:end);
[precision, format] = readNumber(format, []);
end
type = format(1);
format = format(2:end);
% Check and save correct format
idx = find( formatType == type );
if isempty(idx)
error('Incorrect format');
end;
% Save width
if ~isempty(width), width = str2double(width);end;
% Save precision
if ~isempty(precision), precision = str2double(precision);end;
else
[text, format] = readString(format, [], [' ', '%']);
symbol = '*';
type = 'r';
end
s(t).type = type;
s(t).width = width;
s(t).precision = precision;
s(t).symbol = symbol;
s(t).text = text;
t = t + 1;
end
R = s;
end
% ------------- Вспомагательные функции --------------------
function [out, text] = switchType(text, s, argin, fid)
switch s.type
case 'd'
width = s.width;
% Чтение знака числа
[sign, text] = getSign(text);
if ~isempty(sign), width = width - 1; end;
% Чиение числа
[word, text] = readNumber(text, width);
% Обьеденить знак и число
out = [sign word];
% Если опция emptyvalue установлена и число пустое то заменить на заданное
if ~isempty(out)
out = str2double(out);
if isequalwithequalnans(out, NaN), error(sprintf('Trouble reading double from file: %s', text)); end;
else
if ~isempty(text) && isempty(find(text(1) == [13, 10], 1))
error(sprintf('Trouble reading integer from file: %s', text));
end
end
case 'u'
if isempty(text) || ~isempty(find(text(1) == [13, 10], 1))
out = []; return;
end
[out, text] = readNumber(text, s.width);
% Если опция emptyvalue установлена и число пустое то заменить на заданное
if ~isempty(out)
out = str2double(out);
if isequalwithequalnans(out, NaN), error(sprintf('Trouble reading integer from file: %s', text)); end;
else
if ~isempty(text) && isempty(find(text(1) == [13, 10], 1))
error(sprintf('Trouble reading integer from file: %s', text));
end
end
case 'f'
% Чтение числа
[out, text] = readFloat(text, s);
% Если опция emptyvalue установлена и число пустое то заменить на заданное
if ~isempty(out)
out = str2double(out);
if isequalwithequalnans(out, NaN), error(sprintf('Trouble reading double from file: %s', text)); end;
else
if ~isempty(text) && isempty(find(text(1) == [13, 10], 1))
error(sprintf('Trouble reading integer from file: %s', text));
end
end
case 's'
[word, text] = readString(text, s.width, argin.delimiter);
if isempty(word)
out = {''};
else
out = {word};
end
case 'q'
case 'c'
n = 1;
if ~isempty(s.width), n = s.width; end;
[word, text] = readCharacters(text, n, fid);
out = word(:);
case 'r'
[out, text] = readCharacters(text, length(s.text));
if ~isequal(out, s.text), error('Trouble reading characters from file'); end;
otherwise
error('Error');
end
end
function out = setEmptyValue(text, s, argin)
out = text;
if isempty(text)
if find(['d', 'u', 'f'] == s.type)
out = argin.emptyvalue;
end
end
end
function [out, text] = readDoubleArray(text, argin)
if isempty(text); out = []; return; end;
t = 1;
while isempty(find(text(1) == [13 10], 1))
% Чтение знака
[sign, text] = getSign(text);
% Чтение числа
[word, text] = readFloat(text, []);
% Обьеденить знак и число
word = [sign word];
% Если опция emptyvalue установлена и число пустое то заменить на заданное
if ~isempty(argin.emptyvalue) && isempty(word)
out(t) = argin.emptyvalue;
else
out(t) = str2double(word);
if isequalwithequalnans(out(t), NaN), error('Trouble reading integer from file'); end;
end
% Убрать первый символ если он равен delimiter
if ~isempty(argin.delimiter) && ~isempty(text)
if find(argin.delimiter == text(1))
text = text(2:end);
end
end;
t = t + 1;
if isempty(text); break; end;
end
end

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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#include <assert.h>
#include <errno.h>
#include <limits.h>
#include <sys/stat.h>
#include <sys/types.h>
#ifdef WIN32
#include <malloc.h>
#include <sys/timeb.h>
#include <windows.h>
#else
#include <sys/time.h>
#include <sys/poll.h>
#include <unistd.h>
#endif
#include "dtypes.h"
#include "timefuncs.h"
#ifdef WIN32
double tvals2float(struct tm *t, struct timeb *tstruct)
{
return (double)t->tm_hour * 3600 + (double)t->tm_min * 60 +
(double)t->tm_sec + (double)tstruct->millitm/1.0e3;
}
double floattime()
{
struct timeb tstruct;
ftime(&tstruct);
return (double)tstruct.time + (double)tstruct.millitm/1.0e3;
}
#else
double tv2float(struct timeval *tv)
{
return (double)tv->tv_sec + (double)tv->tv_usec/1.0e6;
}
double diff_time(struct timeval *tv1, struct timeval *tv2)
{
return tv2float(tv1) - tv2float(tv2);
}
#endif
// return as many bits of system randomness as we can get our hands on
u_int64_t i64time()
{
u_int64_t a;
#ifdef WIN32
struct timeb tstruct;
ftime(&tstruct);
a = (((u_int64_t)tstruct.time)<<32) + (u_int64_t)tstruct.millitm;
#else
struct timeval now;
gettimeofday(&now, NULL);
a = (((u_int64_t)now.tv_sec)<<32) + (u_int64_t)now.tv_usec;
#endif
return a;
}
double clock_now()
{
#ifdef WIN32
return floattime();
#else
struct timeval now;
gettimeofday(&now, NULL);
return tv2float(&now);
#endif
}
#ifndef LINUX
static char *wdaystr[] = {"Sun","Mon","Tue","Wed","Thu","Fri","Sat"};
static char *monthstr[] = {"Jan","Feb","Mar","Apr","May","Jun","Jul","Aug",
"Sep","Oct","Nov","Dec"};
#endif
void timestring(double seconds, char *buffer, size_t len)
{
time_t tme = (time_t)seconds;
char *fmt = "%c"; /* needed to suppress GCC warning */
#ifdef LINUX
struct tm tm;
localtime_r(&tme, &tm);
strftime(buffer, len, fmt, &tm);
#else
struct tm *tm;
int hr;
tm = localtime(&tme);
hr = tm->tm_hour;
if (hr > 12) hr -= 12;
if (hr == 0) hr = 12;
snprintf(buffer, len, "%s %02d %s %d %02d:%02d:%02d %s %s",
wdaystr[tm->tm_wday], tm->tm_mday, monthstr[tm->tm_mon],
tm->tm_year+1900, hr, tm->tm_min, tm->tm_sec,
tm->tm_hour>11 ? "PM" : "AM", "");
#endif
}
#ifdef LINUX
extern char *strptime(const char *s, const char *format, struct tm *tm);
double parsetime(char *str)
{
char *fmt = "%c"; /* needed to suppress GCC warning */
char *res;
time_t t;
struct tm tm;
res = strptime(str, fmt, &tm);
if (res != NULL) {
t = mktime(&tm);
if (t == ((time_t)-1))
return -1;
return (double)t;
}
return -1;
}
#else
// TODO
#endif
void sleep_ms(int ms)
{
if (ms == 0)
return;
#ifdef WIN32
Sleep(ms);
#else
struct timeval timeout;
timeout.tv_sec = ms/1000;
timeout.tv_usec = (ms % 1000) * 1000;
select(0, NULL, NULL, NULL, &timeout);
#endif
}
void timeparts(int32_t *buf, double t)
{
time_t tme = (time_t)t;
#ifndef WIN32
struct tm tm;
localtime_r(&tme, &tm);
tm.tm_year += 1900;
memcpy(buf, (char*)&tm, sizeof(struct tm));
#else
struct tm *tm;
tm = localtime(&tme);
tm->tm_year += 1900;
memcpy(buf, (char*)tm, sizeof(struct tm));
#endif
}

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#ifndef __TIMEFUNCS_H_
#define __TIMEFUNCS_H_
u_int64_t i64time();
double clock_now();
void timestring(double seconds, char *buffer, size_t len);
double parsetime(char *str);
void sleep_ms(int ms);
void timeparts(int32_t *buf, double t);
#endif

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% Проверка количества исходящих аргументов% Проверка количества исходящих аргументов% Проверка количества исходящих аргументов% Проверка количества исходящих аргументов% Проверка количества исходящих аргументов% Проверка количества исходящих аргументов% Проверка количества исходящих аргументов% Проверка количества исходящих аргументов% Проверка количества исходящих аргументов% Проверка количества исходящих аргументов% Проверка количества исходящих аргументов% Проверка количества исходящих аргументов
% Проверка количества исходящих аргументов% Проверка количества исходящих аргументов% Проверка количества исходящих аргументов% Проверка количества исходящих аргументов% Проверка количества исходящих аргументов% Проверка количества исходящих аргументов% Проверка количества исходящих аргументов% Проверка количества исходящих аргументов% Проверка количества исходящих аргументов% Проверка количества исходящих аргументов% Проверка количества исходящих аргументов% Проверка количества исходящих аргументов% Проверка количества исходящих аргументов
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#include <stdlib.h>
#include <stdarg.h>
#include <stdio.h>
#include <wchar.h>
#include "llt.h"
int main()
{
llt_init();
test_dblprint();
test_operators();
/*
char *buf = malloc(20000);
char *buf2 = malloc(20000);
FILE *f = fopen("textread.m","rb");
int i=0;
while (!feof(f))
buf[i++] = fgetc(f);
buf[i-1] = '\0';
int len = i-1;
double t0 = clock_now();
int j=0;
for(i=0; i < 20000; i++) {
//j+=u8_charnum(buf,len);
u8_reverse(buf2, buf, len);
}
printf("textread took %.4f sec (%d)\n", clock_now()-t0, j);
FILE *f2 = fopen("u8.txt","rb");
i=0;
while (!feof(f2))
buf[i++] = fgetc(f2);
buf[i-1] = '\0';
len = i-1;
t0 = clock_now();
j=0;
for(i=0; i < 20000; i++) {
//j+=u8_charnum(buf,len);
u8_reverse(buf2, buf, len);
}
printf("u8 took %.4f sec (%d)\n\n", clock_now()-t0, j);
*/
return 0;
}
static void prettycplx(double r, double i)
{
char str[64];
snprint_cplx(str, sizeof(str), r, i, 0, 16, 3, 10, 1);
fputs(str, stdout);
fputc('\n', stdout);
}
static void prettyreal(double r)
{
char str[64];
snprint_real(str, sizeof(str), r, 0, 16, 3, 10);
fputs(str, stdout);
fputc('\n', stdout);
}
void test_dblprint()
{
char str[64];
dbl_tolerance(1e-12);
prettycplx(0,0);
prettycplx(1,0);
prettycplx(0,1);
prettycplx(1,1);
prettycplx(-1,0);
prettycplx(0,-1);
prettycplx(1,-1);
prettycplx(-1,1);
prettycplx(-1,-1);
prettycplx(2,0);
prettycplx(0,2);
prettycplx(2,2);
prettycplx(-2,0);
prettycplx(0,-2);
prettycplx(2,-2);
prettycplx(-2,2);
prettycplx(-2,-2);
prettyreal(1.5);
prettyreal(1.1);
prettyreal(1.1e-100);
prettyreal(1.1e20);
prettyreal(123456789);
prettyreal(1234567890);
prettyreal(12345678901);
prettyreal(-12345678901);
prettyreal(12345678901223);
prettyreal(-12345678901223);
prettyreal(.02);
prettyreal(.002);
prettyreal(.0002);
prettyreal(-.0002);
prettyreal(.00002);
prettyreal(-.00002);
prettyreal(1.0/0);
prettyreal(-1.0/0);
prettyreal(strtod("nan",NULL));
prettyreal(0.0/0);
prettyreal(-0.0/0);
prettyreal(DBL_EPSILON);
}

81
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#include <stdlib.h>
#include <stdarg.h>
#include <stdio.h>
#include <wchar.h>
#include "llt.h"
int main()
{
llt_init();
test_dblprint();
test_operators();
return 0;
}
static void prettycplx(double r, double i)
{
char str[64];
snprint_cplx(str, sizeof(str), r, i, 0, 16, 3, 10, 1);
fputs(str, stdout);
fputc('\n', stdout);
}
static void prettyreal(double r)
{
char str[64];
snprint_real(str, sizeof(str), r, 0, 16, 3, 10);
fputs(str, stdout);
fputc('\n', stdout);
}
void test_dblprint()
{
char str[64];
dbl_tolerance(1e-12);
prettycplx(0,0);
prettycplx(1,0);
prettycplx(0,1);
prettycplx(1,1);
prettycplx(-1,0);
prettycplx(0,-1);
prettycplx(1,-1);
prettycplx(-1,1);
prettycplx(-1,-1);
prettycplx(2,0);
prettycplx(0,2);
prettycplx(2,2);
prettycplx(-2,0);
prettycplx(0,-2);
prettycplx(2,-2);
prettycplx(-2,2);
prettycplx(-2,-2);
prettyreal(1.5);
prettyreal(1.1);
prettyreal(1.1e-100);
prettyreal(1.1e20);
prettyreal(123456789);
prettyreal(1234567890);
prettyreal(12345678901);
prettyreal(-12345678901);
prettyreal(12345678901223);
prettyreal(-12345678901223);
prettyreal(.02);
prettyreal(.002);
prettyreal(.0002);
prettyreal(-.0002);
prettyreal(.00002);
prettyreal(-.00002);
prettyreal(1.0/0);
prettyreal(-1.0/0);
prettyreal(strtod("nan",NULL));
prettyreal(0.0/0);
prettyreal(-0.0/0);
prettyreal(DBL_EPSILON);
}

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/*
Basic UTF-8 manipulation routines
by Jeff Bezanson
placed in the public domain Fall 2005
This code is designed to provide the utilities you need to manipulate
UTF-8 as an internal string encoding. These functions do not perform the
error checking normally needed when handling UTF-8 data, so if you happen
to be from the Unicode Consortium you will want to flay me alive.
I do this because error checking can be performed at the boundaries (I/O),
with these routines reserved for higher performance on data known to be
valid.
A UTF-8 validation routine is included.
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include <wchar.h>
#include <wctype.h>
#ifdef WIN32
#include <malloc.h>
#define snprintf _snprintf
#else
#include <alloca.h>
#endif
#include <assert.h>
#include "utf8.h"
static const u_int32_t offsetsFromUTF8[6] = {
0x00000000UL, 0x00003080UL, 0x000E2080UL,
0x03C82080UL, 0xFA082080UL, 0x82082080UL
};
static const char trailingBytesForUTF8[256] = {
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, 3,3,3,3,3,3,3,3,4,4,4,4,5,5,5,5
};
/* returns length of next utf-8 sequence */
size_t u8_seqlen(const char *s)
{
return trailingBytesForUTF8[(unsigned int)(unsigned char)s[0]] + 1;
}
/* returns the # of bytes needed to encode a certain character
0 means the character cannot (or should not) be encoded. */
size_t u8_charlen(u_int32_t ch)
{
if (ch < 0x80)
return 1;
else if (ch < 0x800)
return 2;
else if (ch < 0x10000)
return 3;
else if (ch < 0x110000)
return 4;
return 0;
}
size_t u8_codingsize(u_int32_t *wcstr, size_t n)
{
size_t i, c=0;
for(i=0; i < n; i++)
c += u8_charlen(wcstr[i]);
return c;
}
/* conversions without error checking
only works for valid UTF-8, i.e. no 5- or 6-byte sequences
srcsz = source size in bytes
sz = dest size in # of wide characters
returns # characters converted
if sz = srcsz+1 (i.e. 4*srcsz+4 bytes), there will always be enough space.
*/
size_t u8_toucs(u_int32_t *dest, size_t sz, const char *src, size_t srcsz)
{
u_int32_t ch;
const char *src_end = src + srcsz;
size_t nb;
size_t i=0;
if (sz == 0 || srcsz == 0)
return 0;
while (i < sz) {
nb = trailingBytesForUTF8[(unsigned char)*src];
if (src + nb >= src_end)
break;
ch = 0;
switch (nb) {
/* these fall through deliberately */
case 3: ch += (unsigned char)*src++; ch <<= 6;
case 2: ch += (unsigned char)*src++; ch <<= 6;
case 1: ch += (unsigned char)*src++; ch <<= 6;
case 0: ch += (unsigned char)*src++;
}
ch -= offsetsFromUTF8[nb];
dest[i++] = ch;
}
return i;
}
/* srcsz = number of source characters
sz = size of dest buffer in bytes
returns # bytes stored in dest
the destination string will never be bigger than the source string.
*/
size_t u8_toutf8(char *dest, size_t sz, const u_int32_t *src, size_t srcsz)
{
u_int32_t ch;
size_t i = 0;
char *dest0 = dest;
char *dest_end = dest + sz;
while (i < srcsz) {
ch = src[i];
if (ch < 0x80) {
if (dest >= dest_end)
break;
*dest++ = (char)ch;
}
else if (ch < 0x800) {
if (dest >= dest_end-1)
break;
*dest++ = (ch>>6) | 0xC0;
*dest++ = (ch & 0x3F) | 0x80;
}
else if (ch < 0x10000) {
if (dest >= dest_end-2)
break;
*dest++ = (ch>>12) | 0xE0;
*dest++ = ((ch>>6) & 0x3F) | 0x80;
*dest++ = (ch & 0x3F) | 0x80;
}
else if (ch < 0x110000) {
if (dest >= dest_end-3)
break;
*dest++ = (ch>>18) | 0xF0;
*dest++ = ((ch>>12) & 0x3F) | 0x80;
*dest++ = ((ch>>6) & 0x3F) | 0x80;
*dest++ = (ch & 0x3F) | 0x80;
}
i++;
}
return (dest-dest0);
}
size_t u8_wc_toutf8(char *dest, u_int32_t ch)
{
if (ch < 0x80) {
dest[0] = (char)ch;
return 1;
}
if (ch < 0x800) {
dest[0] = (ch>>6) | 0xC0;
dest[1] = (ch & 0x3F) | 0x80;
return 2;
}
if (ch < 0x10000) {
dest[0] = (ch>>12) | 0xE0;
dest[1] = ((ch>>6) & 0x3F) | 0x80;
dest[2] = (ch & 0x3F) | 0x80;
return 3;
}
if (ch < 0x110000) {
dest[0] = (ch>>18) | 0xF0;
dest[1] = ((ch>>12) & 0x3F) | 0x80;
dest[2] = ((ch>>6) & 0x3F) | 0x80;
dest[3] = (ch & 0x3F) | 0x80;
return 4;
}
return 0;
}
/* charnum => byte offset */
size_t u8_offset(const char *s, size_t charnum)
{
size_t i=0;
while (charnum > 0) {
if (s[i++] & 0x80) {
(void)(isutf(s[++i]) || isutf(s[++i]) || ++i);
}
charnum--;
}
return i;
}
/* byte offset => charnum */
size_t u8_charnum(const char *s, size_t offset)
{
size_t charnum = 0, i=0;
while (i < offset) {
if (s[i++] & 0x80) {
(void)(isutf(s[++i]) || isutf(s[++i]) || ++i);
}
charnum++;
}
return charnum;
}
/* number of characters in NUL-terminated string */
size_t u8_strlen(const char *s)
{
size_t count = 0;
size_t i = 0, lasti;
while (1) {
lasti = i;
while (s[i] > 0)
i++;
count += (i-lasti);
if (s[i++]==0) break;
(void)(isutf(s[++i]) || isutf(s[++i]) || ++i);
count++;
}
return count;
}
size_t u8_strwidth(const char *s)
{
u_int32_t ch;
size_t nb, tot=0;
int w;
signed char sc;
while ((sc = (signed char)*s) != 0) {
if (sc >= 0) {
s++;
if (sc) tot++;
}
else {
nb = trailingBytesForUTF8[(unsigned char)sc];
ch = 0;
switch (nb) {
/* these fall through deliberately */
case 3: ch += (unsigned char)*s++; ch <<= 6;
case 2: ch += (unsigned char)*s++; ch <<= 6;
case 1: ch += (unsigned char)*s++; ch <<= 6;
case 0: ch += (unsigned char)*s++;
}
ch -= offsetsFromUTF8[nb];
w = wcwidth(ch);
if (w > 0) tot += w;
}
}
return tot;
}
/* reads the next utf-8 sequence out of a string, updating an index */
u_int32_t u8_nextchar(const char *s, size_t *i)
{
u_int32_t ch = 0;
size_t sz = 0;
do {
ch <<= 6;
ch += (unsigned char)s[(*i)];
sz++;
} while (s[*i] && (++(*i)) && !isutf(s[*i]));
ch -= offsetsFromUTF8[sz-1];
return ch;
}
/* next character without NUL character terminator */
u_int32_t u8_nextmemchar(const char *s, size_t *i)
{
u_int32_t ch = 0;
size_t sz = 0;
do {
ch <<= 6;
ch += (unsigned char)s[(*i)++];
sz++;
} while (!isutf(s[*i]));
ch -= offsetsFromUTF8[sz-1];
return ch;
}
void u8_inc(const char *s, size_t *i)
{
(void)(isutf(s[++(*i)]) || isutf(s[++(*i)]) || isutf(s[++(*i)]) || ++(*i));
}
void u8_dec(const char *s, size_t *i)
{
(void)(isutf(s[--(*i)]) || isutf(s[--(*i)]) || isutf(s[--(*i)]) || --(*i));
}
int octal_digit(char c)
{
return (c >= '0' && c <= '7');
}
int hex_digit(char c)
{
return ((c >= '0' && c <= '9') ||
(c >= 'A' && c <= 'F') ||
(c >= 'a' && c <= 'f'));
}
/* assumes that src points to the character after a backslash
returns number of input characters processed */
int u8_read_escape_sequence(const char *str, u_int32_t *dest)
{
u_int32_t ch;
char digs[9]="\0\0\0\0\0\0\0\0\0";
int dno=0, i=1;
ch = (u_int32_t)str[0]; /* take literal character */
if (str[0] == 'n')
ch = L'\n';
else if (str[0] == 't')
ch = L'\t';
else if (str[0] == 'r')
ch = L'\r';
else if (str[0] == 'b')
ch = L'\b';
else if (str[0] == 'f')
ch = L'\f';
else if (str[0] == 'v')
ch = L'\v';
else if (str[0] == 'a')
ch = L'\a';
else if (octal_digit(str[0])) {
i = 0;
do {
digs[dno++] = str[i++];
} while (octal_digit(str[i]) && dno < 3);
ch = strtol(digs, NULL, 8);
}
else if (str[0] == 'x') {
while (hex_digit(str[i]) && dno < 2) {
digs[dno++] = str[i++];
}
if (dno > 0)
ch = strtol(digs, NULL, 16);
}
else if (str[0] == 'u') {
while (hex_digit(str[i]) && dno < 4) {
digs[dno++] = str[i++];
}
if (dno > 0)
ch = strtol(digs, NULL, 16);
}
else if (str[0] == 'U') {
while (hex_digit(str[i]) && dno < 8) {
digs[dno++] = str[i++];
}
if (dno > 0)
ch = strtol(digs, NULL, 16);
}
*dest = ch;
return i;
}
/* convert a string with literal \uxxxx or \Uxxxxxxxx characters to UTF-8
example: u8_unescape(mybuf, 256, "hello\\u220e")
note the double backslash is needed if called on a C string literal */
size_t u8_unescape(char *buf, size_t sz, const char *src)
{
size_t c=0, amt;
u_int32_t ch;
char temp[4];
while (*src && c < sz) {
if (*src == '\\') {
src++;
amt = u8_read_escape_sequence(src, &ch);
}
else {
ch = (u_int32_t)*src;
amt = 1;
}
src += amt;
amt = u8_wc_toutf8(temp, ch);
if (amt > sz-c)
break;
memcpy(&buf[c], temp, amt);
c += amt;
}
if (c < sz)
buf[c] = '\0';
return c;
}
static inline int buf_put2c(char *buf, const char *src)
{
buf[0] = src[0];
buf[1] = src[1];
buf[2] = '\0';
return 2;
}
int u8_escape_wchar(char *buf, size_t sz, u_int32_t ch)
{
assert(sz > 2);
if (ch == L'\n')
return buf_put2c(buf, "\\n");
else if (ch == L'\t')
return buf_put2c(buf, "\\t");
else if (ch == L'\r')
return buf_put2c(buf, "\\r");
else if (ch == L'\b')
return buf_put2c(buf, "\\b");
else if (ch == L'\f')
return buf_put2c(buf, "\\f");
else if (ch == L'\v')
return buf_put2c(buf, "\\v");
else if (ch == L'\a')
return buf_put2c(buf, "\\a");
else if (ch == L'\\')
return buf_put2c(buf, "\\\\");
else if (ch < 32 || ch == 0x7f)
return snprintf(buf, sz, "\\x%.2hhX", (unsigned char)ch);
else if (ch > 0xFFFF)
return snprintf(buf, sz, "\\U%.8X", (u_int32_t)ch);
else if (ch >= 0x80)
return snprintf(buf, sz, "\\u%.4hX", (unsigned short)ch);
buf[0] = (char)ch;
buf[1] = '\0';
return 1;
}
size_t u8_escape(char *buf, size_t sz, const char *src, size_t *pi, size_t end,
int escape_quotes, int ascii)
{
size_t i = *pi, i0;
u_int32_t ch;
char *start = buf;
char *blim = start + sz-11;
assert(sz > 11);
while (i<end && buf<blim) {
// sz-11: leaves room for longest escape sequence
if (escape_quotes && src[i] == '"') {
buf += buf_put2c(buf, "\\\"");
i++;
}
else if (src[i] == '\\') {
buf += buf_put2c(buf, "\\\\");
i++;
}
else {
i0 = i;
ch = u8_nextmemchar(src, &i);
if (ascii || !iswprint((wint_t)ch)) {
buf += u8_escape_wchar(buf, sz - (buf-start), ch);
}
else {
i = i0;
do {
*buf++ = src[i++];
} while (!isutf(src[i]));
}
}
}
*buf++ = '\0';
*pi = i;
return (buf-start);
}
char *u8_strchr(const char *s, u_int32_t ch, size_t *charn)
{
size_t i = 0, lasti=0;
u_int32_t c;
*charn = 0;
while (s[i]) {
c = u8_nextchar(s, &i);
if (c == ch) {
/* it's const for us, but not necessarily the caller */
return (char*)&s[lasti];
}
lasti = i;
(*charn)++;
}
return NULL;
}
char *u8_memchr(const char *s, u_int32_t ch, size_t sz, size_t *charn)
{
size_t i = 0, lasti=0;
u_int32_t c;
int csz;
*charn = 0;
while (i < sz) {
c = csz = 0;
do {
c <<= 6;
c += (unsigned char)s[i++];
csz++;
} while (i < sz && !isutf(s[i]));
c -= offsetsFromUTF8[csz-1];
if (c == ch) {
return (char*)&s[lasti];
}
lasti = i;
(*charn)++;
}
return NULL;
}
char *u8_memrchr(const char *s, u_int32_t ch, size_t sz)
{
size_t i = sz-1, tempi=0;
u_int32_t c;
if (sz == 0) return NULL;
while (i && !isutf(s[i])) i--;
while (1) {
tempi = i;
c = u8_nextmemchar(s, &tempi);
if (c == ch) {
return (char*)&s[i];
}
if (i == 0)
break;
tempi = i;
u8_dec(s, &i);
if (i > tempi)
break;
}
return NULL;
}
int u8_is_locale_utf8(const char *locale)
{
/* this code based on libutf8 */
const char* cp = locale;
for (; *cp != '\0' && *cp != '@' && *cp != '+' && *cp != ','; cp++) {
if (*cp == '.') {
const char* encoding = ++cp;
for (; *cp != '\0' && *cp != '@' && *cp != '+' && *cp != ','; cp++)
;
if ((cp-encoding == 5 && !strncmp(encoding, "UTF-8", 5))
|| (cp-encoding == 4 && !strncmp(encoding, "utf8", 4)))
return 1; /* it's UTF-8 */
break;
}
}
return 0;
}
size_t u8_vprintf(const char *fmt, va_list ap)
{
size_t cnt, sz=0, nc;
char *buf;
u_int32_t *wcs;
sz = 512;
buf = (char*)alloca(sz);
try_print:
cnt = vsnprintf(buf, sz, fmt, ap);
if (cnt >= sz) {
buf = (char*)alloca(cnt - sz + 1);
sz = cnt + 1;
goto try_print;
}
wcs = (u_int32_t*)alloca((cnt+1) * sizeof(u_int32_t));
nc = u8_toucs(wcs, cnt+1, buf, cnt);
wcs[nc] = 0;
printf("%ls", (wchar_t*)wcs);
return nc;
}
size_t u8_printf(const char *fmt, ...)
{
size_t cnt;
va_list args;
va_start(args, fmt);
cnt = u8_vprintf(fmt, args);
va_end(args);
return cnt;
}
/* based on the valid_utf8 routine from the PCRE library by Philip Hazel
length is in bytes, since without knowing whether the string is valid
it's hard to know how many characters there are! */
int u8_isvalid(const char *str, int length)
{
const unsigned char *p, *pend = (unsigned char*)str + length;
unsigned char c;
int ab;
for (p = (unsigned char*)str; p < pend; p++) {
c = *p;
if (c < 128)
continue;
if ((c & 0xc0) != 0xc0)
return 0;
ab = trailingBytesForUTF8[c];
if (length < ab)
return 0;
length -= ab;
p++;
/* Check top bits in the second byte */
if ((*p & 0xc0) != 0x80)
return 0;
/* Check for overlong sequences for each different length */
switch (ab) {
/* Check for xx00 000x */
case 1:
if ((c & 0x3e) == 0) return 0;
continue; /* We know there aren't any more bytes to check */
/* Check for 1110 0000, xx0x xxxx */
case 2:
if (c == 0xe0 && (*p & 0x20) == 0) return 0;
break;
/* Check for 1111 0000, xx00 xxxx */
case 3:
if (c == 0xf0 && (*p & 0x30) == 0) return 0;
break;
/* Check for 1111 1000, xx00 0xxx */
case 4:
if (c == 0xf8 && (*p & 0x38) == 0) return 0;
break;
/* Check for leading 0xfe or 0xff,
and then for 1111 1100, xx00 00xx */
case 5:
if (c == 0xfe || c == 0xff ||
(c == 0xfc && (*p & 0x3c) == 0)) return 0;
break;
}
/* Check for valid bytes after the 2nd, if any; all must start 10 */
while (--ab > 0) {
if ((*(++p) & 0xc0) != 0x80) return 0;
}
}
return 1;
}
int u8_reverse(char *dest, char * src, size_t len)
{
size_t si=0, di=len;
unsigned char c;
dest[di] = '\0';
while (si < len) {
c = (unsigned char)src[si];
if ((~c) & 0x80) {
di--;
dest[di] = c;
si++;
}
else {
switch (c>>4) {
case 0xC:
case 0xD:
di -= 2;
*((int16_t*)&dest[di]) = *((int16_t*)&src[si]);
si += 2;
break;
case 0xE:
di -= 3;
dest[di] = src[si];
*((int16_t*)&dest[di+1]) = *((int16_t*)&src[si+1]);
si += 3;
break;
case 0xF:
di -= 4;
*((int32_t*)&dest[di]) = *((int32_t*)&src[si]);
si += 4;
break;
default:
return 1;
}
}
}
return 0;
}
u_int32_t u8_fgetc(FILE *f)
{
int amt=0, sz, c;
u_int32_t ch=0;
char c0;
c = fgetc(f);
if (c == EOF)
return UEOF;
ch = (u_int32_t)c;
c0 = (char)ch;
amt = sz = u8_seqlen(&c0);
while (--amt) {
ch <<= 6;
c = fgetc(f);
if (c == EOF)
return UEOF;
ch += (u_int32_t)c;
}
ch -= offsetsFromUTF8[sz-1];
return ch;
}

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#ifndef __UTF8_H_
#define __UTF8_H_
#ifndef MACOSX
#if !defined(__DTYPES_H_) && !defined(_SYS_TYPES_H)
typedef char int8_t;
typedef short int16_t;
typedef int int32_t;
typedef long long int64_t;
typedef unsigned char u_int8_t;
typedef unsigned short u_int16_t;
typedef unsigned int u_int32_t;
typedef unsigned long long u_int64_t;
#endif
#endif
/* is c the start of a utf8 sequence? */
#define isutf(c) (((c)&0xC0)!=0x80)
#define UEOF ((u_int32_t)-1)
/* convert UTF-8 data to wide character */
size_t u8_toucs(u_int32_t *dest, size_t sz, const char *src, size_t srcsz);
/* the opposite conversion */
size_t u8_toutf8(char *dest, size_t sz, const u_int32_t *src, size_t srcsz);
/* single character to UTF-8, returns # bytes written */
size_t u8_wc_toutf8(char *dest, u_int32_t ch);
/* character number to byte offset */
size_t u8_offset(const char *str, size_t charnum);
/* byte offset to character number */
size_t u8_charnum(const char *s, size_t offset);
/* return next character, updating an index variable */
u_int32_t u8_nextchar(const char *s, size_t *i);
/* next character without NUL character terminator */
u_int32_t u8_nextmemchar(const char *s, size_t *i);
/* move to next character */
void u8_inc(const char *s, size_t *i);
/* move to previous character */
void u8_dec(const char *s, size_t *i);
/* returns length of next utf-8 sequence */
size_t u8_seqlen(const char *s);
/* returns the # of bytes needed to encode a certain character */
size_t u8_charlen(u_int32_t ch);
/* computes the # of bytes needed to encode a WC string as UTF-8 */
size_t u8_codingsize(u_int32_t *wcstr, size_t n);
/* assuming src points to the character after a backslash, read an
escape sequence, storing the result in dest and returning the number of
input characters processed */
int u8_read_escape_sequence(const char *src, u_int32_t *dest);
/* given a wide character, convert it to an ASCII escape sequence stored in
buf, where buf is "sz" bytes. returns the number of characters output.
sz must be at least 3. */
int u8_escape_wchar(char *buf, size_t sz, u_int32_t ch);
/* convert a string "src" containing escape sequences to UTF-8 */
size_t u8_unescape(char *buf, size_t sz, const char *src);
/* convert UTF-8 "src" to escape sequences.
sz is buf size in bytes. must be at least 12.
if escape_quotes is nonzero, quote characters will be escaped.
if ascii is nonzero, the output is 7-bit ASCII, no UTF-8 survives.
starts at src[*pi], updates *pi to point to the first unprocessed
byte of the input.
end is one more than the last allowable value of *pi.
returns number of bytes placed in buf, including a NUL terminator.
*/
size_t u8_escape(char *buf, size_t sz, const char *src, size_t *pi, size_t end,
int escape_quotes, int ascii);
/* utility predicates used by the above */
int octal_digit(char c);
int hex_digit(char c);
/* return a pointer to the first occurrence of ch in s, or NULL if not
found. character index of found character returned in *charn. */
char *u8_strchr(const char *s, u_int32_t ch, size_t *charn);
/* same as the above, but searches a buffer of a given size instead of
a NUL-terminated string. */
char *u8_memchr(const char *s, u_int32_t ch, size_t sz, size_t *charn);
char *u8_memrchr(const char *s, u_int32_t ch, size_t sz);
/* count the number of characters in a UTF-8 string */
size_t u8_strlen(const char *s);
/* number of columns occupied by a string */
size_t u8_strwidth(const char *s);
int u8_is_locale_utf8(const char *locale);
/* printf where the format string and arguments may be in UTF-8.
you can avoid this function and just use ordinary printf() if the current
locale is UTF-8. */
size_t u8_vprintf(const char *fmt, va_list ap);
size_t u8_printf(const char *fmt, ...);
/* determine whether a sequence of bytes is valid UTF-8. length is in bytes */
int u8_isvalid(const char *str, int length);
/* reverse a UTF-8 string. len is length in bytes. dest and src must both
be allocated to at least len+1 bytes. returns 1 for error, 0 otherwise */
int u8_reverse(char *dest, char *src, size_t len);
#include <stdio.h> // temporary, until u8_fgetc is gone
/* read a UTF-8 sequence from a stream and return a wide character or UEOF */
u_int32_t u8_fgetc(FILE *f);
#endif

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#include <stdlib.h>
#include <string.h>
#include <stddef.h>
#include <alloca.h>
#include "dtypes.h"
#include "utils.h"
void memswap(char *a, char *b, size_t sz)
{
int8_t i8;
int32_t i32;
int32_t *a4, *b4;
if (sz < 4) {
while (sz--) {
i8 = *a;
*a++ = *b;
*b++ = i8;
}
}
else {
while (sz & 0x3) {
i8 = *a;
*a++ = *b;
*b++ = i8;
sz--;
}
a4 = (int32_t*)a;
b4 = (int32_t*)b;
sz >>= 2;
while (sz--) {
i32 = *a4;
*a4++ = *b4;
*b4++ = i32;
}
}
}
void memreverse(char *a, size_t n, size_t elsz)
{
int64_t i64, *pi64;
int32_t i32, *pi32;
int16_t i16, *pi16;
int8_t i8;
size_t i;
char *temp;
size_t eli, tot;
if (n==0 || elsz==0) return;
switch(elsz) {
case 16:
pi64 = (int64_t*)a;
for(i=0; i < n/2; i++) {
i64 = pi64[2*i];
pi64[2*i] = pi64[2*(n-i-1)];
pi64[2*(n-i-1)] = i64;
i64 = pi64[2*i+1];
pi64[2*i+1] = pi64[2*(n-i-1)+1];
pi64[2*(n-i-1)+1] = i64;
}
break;
case 8:
pi64 = (int64_t*)a;
for(i=0; i < n/2; i++) {
i64 = pi64[i];
pi64[i] = pi64[n-i-1];
pi64[n-i-1] = i64;
}
break;
case 4:
pi32 = (int32_t*)a;
for(i=0; i < n/2; i++) {
i32 = pi32[i];
pi32[i] = pi32[n-i-1];
pi32[n-i-1] = i32;
}
break;
case 2:
pi16 = (int16_t*)a;
for(i=0; i < n/2; i++) {
i16 = pi16[i];
pi16[i] = pi16[n-i-1];
pi16[n-i-1] = i16;
}
break;
case 1:
for(i=0; i < n/2; i++) {
i8 = a[i];
a[i] = a[n-i-1];
a[n-i-1] = i8;
}
break;
default:
tot = n*elsz;
if (elsz < 4097)
temp = alloca(elsz);
else
temp = malloc(elsz);
if (temp != NULL) {
for(i=0, eli=0; i < n/2; i++, eli+=elsz) {
memcpy(temp, &a[eli], elsz);
memcpy(&a[eli], &a[tot-eli-elsz], elsz);
memcpy(&a[tot-eli-elsz], temp, elsz);
}
if (elsz >= 4097)
free(temp);
}
break;
}
}
void memreverse_to(char *dest, char *a, size_t n, size_t elsz)
{
int64_t *pi64, *di64;
int32_t *pi32, *di32;
int16_t *pi16, *di16;
size_t i;
size_t eli, tot;
if (n==0 || elsz==0) return;
switch(elsz) {
case 16:
pi64 = (int64_t*)a;
di64 = (int64_t*)dest;
for(i=0; i < n/2; i++) {
di64[2*i] = pi64[2*(n-i-1)];
di64[2*(n-i-1)] = pi64[2*i];
di64[2*i+1] = pi64[2*(n-i-1)+1];
di64[2*(n-i-1)+1] = pi64[2*i+1];
}
if (n&0x1) {
di64[2*i] = pi64[2*i];
di64[2*i+1] = pi64[2*i+1];
}
break;
case 8:
pi64 = (int64_t*)a;
di64 = (int64_t*)dest;
for(i=0; i < n/2; i++) {
di64[i] = pi64[n-i-1];
di64[n-i-1] = pi64[i];
}
if (n&0x1)
di64[i] = pi64[i];
break;
case 4:
pi32 = (int32_t*)a;
di32 = (int32_t*)dest;
for(i=0; i < n/2; i++) {
di32[i] = pi32[n-i-1];
di32[n-i-1] = pi32[i];
}
if (n&0x1)
di32[i] = pi32[i];
break;
case 2:
pi16 = (int16_t*)a;
di16 = (int16_t*)dest;
for(i=0; i < n/2; i++) {
di16[i] = pi16[n-i-1];
di16[n-i-1] = pi16[i];
}
if (n&0x1)
di16[i] = pi16[i];
break;
case 1:
for(i=0; i < n/2; i++) {
dest[i] = a[n-i-1];
dest[n-i-1] = a[i];
}
if (n&0x1)
dest[i] = a[i];
break;
default:
tot = n*elsz;
for(i=0, eli=0; i < n/2; i++, eli+=elsz) {
memcpy(&dest[eli], &a[tot - eli - elsz], elsz);
memcpy(&dest[tot - eli - elsz], &a[eli], elsz);
}
if (n&0x1)
memcpy(&dest[eli], &a[eli], elsz);
break;
}
}
void bswap_buffer(byte_t *data, size_t sz, size_t npts)
{
size_t i, b;
byte_t *el;
byte_t temp;
if (sz <= 1)
return;
switch (sz) {
case 8:
for(i=0; i < npts; i++) {
((u_int64_t*)data)[i] = bswap_64(((u_int64_t*)data)[i]);
}
break;
case 4:
for(i=0; i < npts; i++) {
((u_int32_t*)data)[i] = bswap_32(((u_int32_t*)data)[i]);
}
break;
case 2:
for(i=0; i < npts; i++) {
((u_int16_t*)data)[i] = bswap_16(((u_int16_t*)data)[i]);
}
break;
default:
for(i=0; i < sz * npts; i += sz) {
el = data + i;
for(b=0; b < sz/2; b++) {
temp = el[b];
el[b] = el[sz-b-1];
el[sz-b-1] = temp;
}
}
}
}
void bswap(byte_t *s, size_t n)
{
unsigned int i;
char temp;
switch (n) {
case 8:
*(u_int64_t*)s = bswap_64(*(u_int64_t*)s); break;
case 4:
*(u_int32_t*)s = bswap_32(*(u_int32_t*)s); break;
case 2:
*(u_int16_t*)s = bswap_16(*(u_int16_t*)s); break;
case 1:
break;
default:
for(i=0; i < n/2; i++) {
temp = s[i];
s[i] = s[n-i-1];
s[n-i-1] = temp;
}
}
}
void bswap_to(byte_t *dest, byte_t *src, size_t n)
{
unsigned int i;
switch (n) {
case 8:
*(u_int64_t*)dest = bswap_64(*(u_int64_t*)src); break;
case 4:
*(u_int32_t*)dest = bswap_32(*(u_int32_t*)src); break;
case 2:
*(u_int16_t*)dest = bswap_16(*(u_int16_t*)src); break;
case 1:
break;
default:
for(i=0; i < n; i++) {
dest[i] = src[n-i-1];
}
}
}
#define ALIGNED_TO_ACTUAL(p) (((char*)p) - ((long*)p)[-1])
static void *aligned_ptr(char *ptr, size_t align_size)
{
char *ptr2, *aligned_ptr;
ptr2 = ptr + sizeof(long);
aligned_ptr = (char*)ALIGN(((uptrint_t)ptr2), align_size);
((long*)aligned_ptr)[-1] = (long)(aligned_ptr - ptr);
return aligned_ptr;
}
/* align_size has to be a power of two */
void *malloc_aligned(size_t size, size_t align_size)
{
char *ptr;
ptr = (char*)malloc(size + align_size-1 + sizeof(long));
if (ptr == NULL)
return NULL;
return aligned_ptr(ptr, align_size);
}
void free_aligned(void *ptr)
{
free(ALIGNED_TO_ACTUAL(ptr));
}
void *realloc_aligned(void *ptr, size_t size, size_t align_size)
{
char *pnew;
if (ptr != NULL)
ptr = ALIGNED_TO_ACTUAL(ptr);
pnew = realloc(ptr, size + align_size-1 + sizeof(long));
if (pnew == NULL)
return NULL;
return aligned_ptr(pnew, align_size);
}

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#ifndef __UTILS_H_
#define __UTILS_H_
/* these functions byteswap any-size units --------------------- */
void bswap(byte_t *s, size_t n);
void bswap_to(byte_t *dest, byte_t *src, size_t n);
void bswap_buffer(byte_t *data, size_t sz, size_t npts);
/* ------------------------------------------------------------- */
/* reverse the order of elements of any size, in place or out of place */
/* n is the number of elements */
void memreverse(char *a, size_t n, size_t elsz);
void memreverse_to(char *dest, char *a, size_t n, size_t elsz);
/* swap the contents of two buffers */
void memswap(char *a, char *b, size_t sz);
/* allocating aligned blocks ----------------------------------- */
void *malloc_aligned(size_t size, size_t align_size);
void free_aligned(void *ptr);
void *realloc_aligned(void *ptr, size_t size, size_t align_size);
/* ------------------------------------------------------------- */
int dbl_equals(double a, double b);
int flt_equals(float a, float b);
void dbl_tolerance(double tol);
void flt_tolerance(float tol);
int double_exponent(double d);
double double_mantissa(double d);
int float_exponent(float f);
float float_mantissa(float f);
void snprint_real(char *s, size_t cnt, double r,
int width, // printf field width, or 0
int dec, // # decimal digits desired, recommend 16
// # of zeros in .00...0x before using scientific notation
// recommend 3-4 or so
int max_digs_rt,
// # of digits left of decimal before scientific notation
// recommend 10
int max_digs_lf);
void snprint_cplx(char *s, size_t cnt, double re, double im,
// args to pass on to snprint_real
int width, int dec,
int max_digs_rt, int max_digs_lf,
// print spaces around sign in a+bi
int spflag);
extern double trunc(double x);
STATIC_INLINE double fpart(double arg)
{
return arg - trunc(arg);
}
#define ipart(x) trunc(x)
numerictype_t effective_numerictype(double r);
double conv_to_double(void *data, numerictype_t tag);
void conv_from_double(void *data, double d, numerictype_t tag);
int64_t conv_to_int64(void *data, numerictype_t tag);
uint64_t conv_to_uint64(void *data, numerictype_t tag);
int32_t conv_to_int32(void *data, numerictype_t tag);
uint32_t conv_to_uint32(void *data, numerictype_t tag);
#ifdef BITS64
#define conv_to_long conv_to_int64
#define conv_to_ulong conv_to_uint64
#else
#define conv_to_long conv_to_int32
#define conv_to_ulong conv_to_uint32
#endif
int cmp_same_lt(void *a, void *b, numerictype_t tag);
int cmp_same_eq(void *a, void *b, numerictype_t tag);
int cmp_lt(void *a, numerictype_t atag, void *b, numerictype_t btag);
int cmp_eq(void *a, numerictype_t atag, void *b, numerictype_t btag);
#ifdef ARCH_X86_64
# define LEGACY_REGS "=Q"
#else
# define LEGACY_REGS "=q"
#endif
#if !defined(__INTEL_COMPILER) && (defined(ARCH_X86) || defined(ARCH_X86_64))
STATIC_INLINE u_int16_t ByteSwap16(u_int16_t x)
{
__asm("xchgb %b0,%h0" :
LEGACY_REGS (x) :
"0" (x));
return x;
}
#define bswap_16(x) ByteSwap16(x)
STATIC_INLINE u_int32_t ByteSwap32(u_int32_t x)
{
#if __CPU__ > 386
__asm("bswap %0":
"=r" (x) :
#else
__asm("xchgb %b0,%h0\n"\
" rorl $16,%0\n"
" xchgb %b0,%h0":
LEGACY_REGS (x) :
#endif
"0" (x));
return x;
}
#define bswap_32(x) ByteSwap32(x)
STATIC_INLINE u_int64_t ByteSwap64(u_int64_t x)
{
#ifdef ARCH_X86_64
__asm("bswap %0":
"=r" (x) :
"0" (x));
return x;
#else
register union { __extension__ u_int64_t __ll;
u_int32_t __l[2]; } __x;
asm("xchgl %0,%1":
"=r"(__x.__l[0]),"=r"(__x.__l[1]):
"0"(bswap_32((unsigned long)x)),"1"(bswap_32((unsigned long)(x>>32))));
return __x.__ll;
#endif
}
#define bswap_64(x) ByteSwap64(x)
#else
#define bswap_16(x) (((x) & 0x00ff) << 8 | ((x) & 0xff00) >> 8)
#ifdef __INTEL_COMPILER
#define bswap_32(x) _bswap(x)
#else
#define bswap_32(x) \
((((x) & 0xff000000) >> 24) | (((x) & 0x00ff0000) >> 8) | \
(((x) & 0x0000ff00) << 8) | (((x) & 0x000000ff) << 24))
#endif
STATIC_INLINE u_int64_t ByteSwap64(u_int64_t x)
{
union {
u_int64_t ll;
u_int32_t l[2];
} w, r;
w.ll = x;
r.l[0] = bswap_32 (w.l[1]);
r.l[1] = bswap_32 (w.l[0]);
return r.ll;
}
#define bswap_64(x) ByteSwap64(x)
#endif
#endif