picrin/port.c

740 lines
17 KiB
C

/**
* See Copyright Notice in picrin.h
*/
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include "picrin.h"
#include "picrin/proc.h"
#include "picrin/port.h"
#include "picrin/string.h"
#include "picrin/blob.h"
pic_value
pic_eof_object()
{
pic_value v;
pic_init_value(v, PIC_VTYPE_EOF);
return v;
}
struct pic_port *
pic_stdin(pic_state *pic)
{
pic_value obj;
obj = pic_funcall(pic, pic->PICRIN_BASE, "current-input-port", pic_nil_value());
return pic_port_ptr(obj);
}
struct pic_port *
pic_stdout(pic_state *pic)
{
pic_value obj;
obj = pic_funcall(pic, pic->PICRIN_BASE, "current-output-port", pic_nil_value());
return pic_port_ptr(obj);
}
struct pic_port *
pic_make_standard_port(pic_state *pic, xFILE *file, short dir)
{
struct pic_port *port;
port = (struct pic_port *)pic_obj_alloc(pic, sizeof(struct pic_port), PIC_TT_PORT);
port->file = file;
port->flags = dir | PIC_PORT_TEXT;
port->status = PIC_PORT_OPEN;
return port;
}
struct pic_port *
pic_open_input_string(pic_state *pic, const char *str)
{
struct pic_port *port;
port = (struct pic_port *)pic_obj_alloc(pic, sizeof(struct pic_port *), PIC_TT_PORT);
port->file = xmopen();
port->flags = PIC_PORT_IN | PIC_PORT_TEXT;
port->status = PIC_PORT_OPEN;
xfputs(str, port->file);
xfflush(port->file);
xrewind(port->file);
return port;
}
struct pic_port *
pic_open_output_string(pic_state *pic)
{
struct pic_port *port;
port = (struct pic_port *)pic_obj_alloc(pic, sizeof(struct pic_port *), PIC_TT_PORT);
port->file = xmopen();
port->flags = PIC_PORT_OUT | PIC_PORT_TEXT;
port->status = PIC_PORT_OPEN;
return port;
}
struct pic_string *
pic_get_output_string(pic_state *pic, struct pic_port *port)
{
size_t size;
char *buf;
/* get endpos */
xfflush(port->file);
size = (size_t)xftell(port->file);
xrewind(port->file);
/* copy to buf */
buf = (char *)pic_alloc(pic, size + 1);
buf[size] = 0;
xfread(buf, size, 1, port->file);
return pic_make_str(pic, buf, size);
}
void
pic_close_port(pic_state *pic, struct pic_port *port)
{
if (xfclose(port->file) == EOF) {
pic_errorf(pic, "close-port: failure");
}
port->status = PIC_PORT_CLOSE;
}
static pic_value
pic_port_call_with_port(pic_state *pic)
{
struct pic_port *port;
struct pic_proc *proc;
pic_value value;
pic_get_args(pic, "pl", &port, &proc);
value = pic_apply1(pic, proc, pic_obj_value(port));
pic_close_port(pic, port);
return value;
}
static pic_value
pic_port_input_port_p(pic_state *pic)
{
pic_value v;
pic_get_args(pic, "o", &v);
if (pic_port_p(v) && (pic_port_ptr(v)->flags & PIC_PORT_IN) != 0) {
return pic_true_value();
}
else {
return pic_false_value();
}
}
static pic_value
pic_port_output_port_p(pic_state *pic)
{
pic_value v;
pic_get_args(pic, "o", &v);
if (pic_port_p(v) && (pic_port_ptr(v)->flags & PIC_PORT_OUT) != 0) {
return pic_true_value();
}
else {
return pic_false_value();
}
}
static pic_value
pic_port_textual_port_p(pic_state *pic)
{
pic_value v;
pic_get_args(pic, "o", &v);
if (pic_port_p(v) && (pic_port_ptr(v)->flags & PIC_PORT_TEXT) != 0) {
return pic_true_value();
}
else {
return pic_false_value();
}
}
static pic_value
pic_port_binary_port_p(pic_state *pic)
{
pic_value v;
pic_get_args(pic, "o", &v);
if (pic_port_p(v) && (pic_port_ptr(v)->flags & PIC_PORT_BINARY) != 0) {
return pic_true_value();
}
else {
return pic_false_value();
}
}
static pic_value
pic_port_port_p(pic_state *pic)
{
pic_value v;
pic_get_args(pic, "o", &v);
return pic_bool_value(pic_port_p(v));
}
static pic_value
pic_port_eof_object_p(pic_state *pic)
{
pic_value v;
pic_get_args(pic, "o", &v);
if (pic_vtype(v) == PIC_VTYPE_EOF) {
return pic_true_value();
}
else {
return pic_false_value();
}
}
static pic_value
pic_port_eof_object(pic_state *pic)
{
pic_get_args(pic, "");
return pic_eof_object();
}
static pic_value
pic_port_port_open_p(pic_state *pic)
{
struct pic_port *port;
pic_get_args(pic, "p", &port);
return pic_bool_value(port->status == PIC_PORT_OPEN);
}
static pic_value
pic_port_close_port(pic_state *pic)
{
struct pic_port *port;
pic_get_args(pic, "p", &port);
pic_close_port(pic, port);
return pic_none_value();
}
#define assert_port_profile(port, flgs, stat, caller) do { \
if ((port->flags & (flgs)) != (flgs)) { \
switch (flgs) { \
case PIC_PORT_IN: \
pic_errorf(pic, caller ": expected output port"); \
case PIC_PORT_OUT: \
pic_errorf(pic, caller ": expected input port"); \
case PIC_PORT_IN | PIC_PORT_TEXT: \
pic_errorf(pic, caller ": expected input/textual port"); \
case PIC_PORT_IN | PIC_PORT_BINARY: \
pic_errorf(pic, caller ": expected input/binary port"); \
case PIC_PORT_OUT | PIC_PORT_TEXT: \
pic_errorf(pic, caller ": expected output/textual port"); \
case PIC_PORT_OUT | PIC_PORT_BINARY: \
pic_errorf(pic, caller ": expected output/binary port"); \
} \
} \
if (port->status != stat) { \
switch (stat) { \
case PIC_PORT_OPEN: \
pic_errorf(pic, caller ": expected open port"); \
case PIC_PORT_CLOSE: \
pic_errorf(pic, caller ": expected close port"); \
} \
} \
} while (0)
static pic_value
pic_port_open_input_string(pic_state *pic)
{
struct pic_port *port;
char *str;
pic_get_args(pic, "z", &str);
port = pic_open_input_string(pic, str);
return pic_obj_value(port);
}
static pic_value
pic_port_open_output_string(pic_state *pic)
{
struct pic_port *port;
pic_get_args(pic, "");
port = pic_open_output_string(pic);
return pic_obj_value(port);
}
static pic_value
pic_port_get_output_string(pic_state *pic)
{
struct pic_port *port = pic_stdout(pic);
pic_get_args(pic, "|p", &port);
assert_port_profile(port, PIC_PORT_OUT | PIC_PORT_TEXT, PIC_PORT_OPEN, "get-output-string");
return pic_obj_value(pic_get_output_string(pic, port));
}
static pic_value
pic_port_open_input_blob(pic_state *pic)
{
struct pic_port *port;
struct pic_blob *blob;
pic_get_args(pic, "b", &blob);
port = (struct pic_port *)pic_obj_alloc(pic, sizeof(struct pic_port *), PIC_TT_PORT);
port->file = xmopen();
port->flags = PIC_PORT_IN | PIC_PORT_BINARY;
port->status = PIC_PORT_OPEN;
xfwrite(blob->data, 1, blob->len, port->file);
xfflush(port->file);
xrewind(port->file);
return pic_obj_value(port);
}
static pic_value
pic_port_open_output_bytevector(pic_state *pic)
{
struct pic_port *port;
pic_get_args(pic, "");
port = (struct pic_port *)pic_obj_alloc(pic, sizeof(struct pic_port *), PIC_TT_PORT);
port->file = xmopen();
port->flags = PIC_PORT_OUT | PIC_PORT_BINARY;
port->status = PIC_PORT_OPEN;
return pic_obj_value(port);
}
static pic_value
pic_port_get_output_bytevector(pic_state *pic)
{
struct pic_port *port = pic_stdout(pic);
pic_blob *blob;
size_t size;
pic_get_args(pic, "|p", &port);
assert_port_profile(port, PIC_PORT_OUT | PIC_PORT_BINARY, PIC_PORT_OPEN, "get-output-bytevector");
/* get endpos */
xfflush(port->file);
size = (size_t)xftell(port->file);
xrewind(port->file);
/* copy to buf */
blob = pic_make_blob(pic, size);
xfread(blob->data, 1, size, port->file);
return pic_obj_value(blob);
}
static pic_value
pic_port_read_char(pic_state *pic)
{
int c;
struct pic_port *port = pic_stdin(pic);
pic_get_args(pic, "|p", &port);
assert_port_profile(port, PIC_PORT_IN | PIC_PORT_TEXT, PIC_PORT_OPEN, "read-char");
if ((c = xfgetc(port->file)) == EOF) {
return pic_eof_object();
}
else {
return pic_char_value((char)c);
}
}
static pic_value
pic_port_peek_char(pic_state *pic)
{
int c;
struct pic_port *port = pic_stdin(pic);
pic_get_args(pic, "|p", &port);
assert_port_profile(port, PIC_PORT_IN | PIC_PORT_TEXT, PIC_PORT_OPEN, "peek-char");
if ((c = xfgetc(port->file)) == EOF) {
return pic_eof_object();
}
else {
xungetc(c, port->file);
return pic_char_value((char)c);
}
}
static pic_value
pic_port_read_line(pic_state *pic)
{
int c;
struct pic_port *port = pic_stdin(pic), *buf;
struct pic_string *str;
pic_get_args(pic, "|p", &port);
assert_port_profile(port, PIC_PORT_IN | PIC_PORT_TEXT, PIC_PORT_OPEN, "read-line");
buf = pic_open_output_string(pic);
while ((c = xfgetc(port->file)) != EOF && c != '\n') {
xfputc(c, buf->file);
}
str = pic_get_output_string(pic, buf);
if (pic_strlen(str) == 0 && c == EOF) {
return pic_eof_object();
}
else {
return pic_obj_value(str);
}
}
static pic_value
pic_port_char_ready_p(pic_state *pic)
{
struct pic_port *port = pic_stdin(pic);
assert_port_profile(port, PIC_PORT_IN | PIC_PORT_TEXT, PIC_PORT_OPEN, "char-ready?");
pic_get_args(pic, "|p", &port);
return pic_true_value(); /* FIXME: always returns #t */
}
static pic_value
pic_port_read_string(pic_state *pic){
struct pic_port *port = pic_stdin(pic), *buf;
pic_str *str;
int k, i;
int c;
pic_get_args(pic, "i|p", &k, &port);
assert_port_profile(port, PIC_PORT_IN | PIC_PORT_TEXT, PIC_PORT_OPEN, "read-stritg");
c = EOF;
buf = pic_open_output_string(pic);
for(i = 0; i < k; ++i) {
if((c = xfgetc(port->file)) == EOF){
break;
}
xfputc(c, buf->file);
}
str = pic_get_output_string(pic, buf);
if (pic_strlen(str) == 0 && c == EOF) {
return pic_eof_object();
}
else {
return pic_obj_value(str);
}
}
static pic_value
pic_port_read_byte(pic_state *pic){
struct pic_port *port = pic_stdin(pic);
int c;
pic_get_args(pic, "|p", &port);
assert_port_profile(port, PIC_PORT_IN | PIC_PORT_BINARY, PIC_PORT_OPEN, "read-u8");
if ((c = xfgetc(port->file)) == EOF) {
return pic_eof_object();
}
return pic_int_value(c);
}
static pic_value
pic_port_peek_byte(pic_state *pic)
{
int c;
struct pic_port *port = pic_stdin(pic);
pic_get_args(pic, "|p", &port);
assert_port_profile(port, PIC_PORT_IN | PIC_PORT_BINARY, PIC_PORT_OPEN, "peek-u8");
c = xfgetc(port->file);
if (c == EOF) {
return pic_eof_object();
}
else {
xungetc(c, port->file);
return pic_int_value(c);
}
}
static pic_value
pic_port_byte_ready_p(pic_state *pic)
{
struct pic_port *port = pic_stdin(pic);
pic_get_args(pic, "|p", &port);
assert_port_profile(port, PIC_PORT_IN | PIC_PORT_BINARY, PIC_PORT_OPEN, "u8-ready?");
return pic_true_value(); /* FIXME: always returns #t */
}
static pic_value
pic_port_read_blob(pic_state *pic)
{
struct pic_port *port = pic_stdin(pic);
pic_blob *blob;
int k;
size_t i;
pic_get_args(pic, "i|p", &k, &port);
assert_port_profile(port, PIC_PORT_IN | PIC_PORT_BINARY, PIC_PORT_OPEN, "read-bytevector");
if (k < 0) {
pic_errorf(pic, "read-bytevector: index must be non-negative %d", k);
}
blob = pic_make_blob(pic, (size_t)k);
i = xfread(blob->data, sizeof(char), (size_t)k, port->file);
if (i == 0) {
return pic_eof_object();
}
else {
pic_realloc(pic, blob->data, i);
blob->len = i;
return pic_obj_value(blob);
}
}
static pic_value
pic_port_read_blob_ip(pic_state *pic)
{
struct pic_port *port;
struct pic_blob *bv;
int n, start, end;
char *buf;
size_t i, len;
n = pic_get_args(pic, "b|pii", &bv, &port, &start, &end);
switch (n) {
case 1:
port = pic_stdin(pic);
case 2:
start = 0;
case 3:
end = (int)bv->len;
}
assert_port_profile(port, PIC_PORT_IN | PIC_PORT_BINARY, PIC_PORT_OPEN, "read-bytevector!");
if (end - start < 0) {
pic_errorf(pic, "read-bytevector!: end index must be greater than or equal to start index");
}
len = (size_t)(end - start);
buf = pic_calloc(pic, len, sizeof(char));
i = xfread(buf, sizeof(char), len, port->file);
memcpy(bv->data + start, buf, i);
pic_free(pic, buf);
if (i == 0) {
return pic_eof_object();
}
else {
return pic_int_value((int)i);
}
}
static pic_value
pic_port_newline(pic_state *pic)
{
struct pic_port *port = pic_stdout(pic);
pic_get_args(pic, "|p", &port);
assert_port_profile(port, PIC_PORT_OUT | PIC_PORT_TEXT, PIC_PORT_OPEN, "newline");
xfputs("\n", port->file);
return pic_none_value();
}
static pic_value
pic_port_write_char(pic_state *pic)
{
char c;
struct pic_port *port = pic_stdout(pic);
pic_get_args(pic, "c|p", &c, &port);
assert_port_profile(port, PIC_PORT_OUT | PIC_PORT_TEXT, PIC_PORT_OPEN, "write-char");
xfputc(c, port->file);
return pic_none_value();
}
static pic_value
pic_port_write_string(pic_state *pic)
{
char *str;
struct pic_port *port;
int start, end, n, i;
n = pic_get_args(pic, "z|pii", &str, &port, &start, &end);
switch (n) {
case 1:
port = pic_stdout(pic);
case 2:
start = 0;
case 3:
end = INT_MAX;
}
assert_port_profile(port, PIC_PORT_OUT | PIC_PORT_TEXT, PIC_PORT_OPEN, "write-string");
for (i = start; i < end && str[i] != '\0'; ++i) {
xfputc(str[i], port->file);
}
return pic_none_value();
}
static pic_value
pic_port_write_byte(pic_state *pic)
{
int i;
struct pic_port *port = pic_stdout(pic);
pic_get_args(pic, "i|p", &i, &port);
assert_port_profile(port, PIC_PORT_OUT | PIC_PORT_BINARY, PIC_PORT_OPEN, "write-u8");
xfputc(i, port->file);
return pic_none_value();
}
static pic_value
pic_port_write_blob(pic_state *pic)
{
struct pic_blob *blob;
struct pic_port *port;
int start, end, n, i;
n = pic_get_args(pic, "b|pii", &blob, &port, &start, &end);
switch (n) {
case 1:
port = pic_stdout(pic);
case 2:
start = 0;
case 3:
end = (int)blob->len;
}
assert_port_profile(port, PIC_PORT_OUT | PIC_PORT_BINARY, PIC_PORT_OPEN, "write-bytevector");
for (i = start; i < end; ++i) {
xfputc(blob->data[i], port->file);
}
return pic_none_value();
}
static pic_value
pic_port_flush(pic_state *pic)
{
struct pic_port *port = pic_stdout(pic);
pic_get_args(pic, "|p", &port);
assert_port_profile(port, PIC_PORT_OUT, PIC_PORT_OPEN, "flush-output-port");
xfflush(port->file);
return pic_none_value();
}
void
pic_init_port(pic_state *pic)
{
pic_defvar(pic, "current-input-port", pic_obj_value(pic->xSTDIN), NULL);
pic_defvar(pic, "current-output-port", pic_obj_value(pic->xSTDOUT), NULL);
pic_defvar(pic, "current-error-port", pic_obj_value(pic->xSTDERR), NULL);
pic_defun(pic, "call-with-port", pic_port_call_with_port);
pic_defun(pic, "input-port?", pic_port_input_port_p);
pic_defun(pic, "output-port?", pic_port_output_port_p);
pic_defun(pic, "textual-port?", pic_port_textual_port_p);
pic_defun(pic, "binary-port?", pic_port_binary_port_p);
pic_defun(pic, "port?", pic_port_port_p);
pic_defun(pic, "port-open?", pic_port_port_open_p);
pic_defun(pic, "close-port", pic_port_close_port);
/* string I/O */
pic_defun(pic, "open-input-string", pic_port_open_input_string);
pic_defun(pic, "open-output-string", pic_port_open_output_string);
pic_defun(pic, "get-output-string", pic_port_get_output_string);
pic_defun(pic, "open-input-bytevector", pic_port_open_input_blob);
pic_defun(pic, "open-output-bytevector", pic_port_open_output_bytevector);
pic_defun(pic, "get-output-bytevector", pic_port_get_output_bytevector);
/* input */
pic_defun(pic, "read-char", pic_port_read_char);
pic_defun(pic, "peek-char", pic_port_peek_char);
pic_defun(pic, "read-line", pic_port_read_line);
pic_defun(pic, "eof-object?", pic_port_eof_object_p);
pic_defun(pic, "eof-object", pic_port_eof_object);
pic_defun(pic, "char-ready?", pic_port_char_ready_p);
pic_defun(pic, "read-string", pic_port_read_string);
pic_defun(pic, "read-u8", pic_port_read_byte);
pic_defun(pic, "peek-u8", pic_port_peek_byte);
pic_defun(pic, "u8-ready?", pic_port_byte_ready_p);
pic_defun(pic, "read-bytevector", pic_port_read_blob);
pic_defun(pic, "read-bytevector!", pic_port_read_blob_ip);
/* output */
pic_defun(pic, "newline", pic_port_newline);
pic_defun(pic, "write-char", pic_port_write_char);
pic_defun(pic, "write-string", pic_port_write_string);
pic_defun(pic, "write-u8", pic_port_write_byte);
pic_defun(pic, "write-bytevector", pic_port_write_blob);
pic_defun(pic, "flush-output-port", pic_port_flush);
}