picrin/extlib/benz/port.c

377 lines
8.3 KiB
C

/**
* See Copyright Notice in picrin.h
*/
#include "picrin.h"
#include "picrin/object.h"
#undef EOF
#define EOF (-1)
pic_value
pic_open_port(pic_state *pic, xFILE *file)
{
struct pic_port *port;
port = (struct pic_port *)pic_obj_alloc(pic, sizeof(struct pic_port), PIC_TYPE_PORT);
port->file = file;
return pic_obj_value(port);
}
xFILE *
pic_fileno(pic_state PIC_UNUSED(*pic), pic_value port)
{
return pic_port_ptr(pic, port)->file;
}
void
pic_close_port(pic_state *pic, pic_value port)
{
xFILE *file = pic_fileno(pic, port);
if (file->flag == 0) {
return;
}
if (xfclose(pic, file) == EOF) {
pic_errorf(pic, "close-port: failure");
}
}
static pic_value
pic_port_input_port_p(pic_state *pic)
{
pic_value v;
pic_get_args(pic, "o", &v);
if (pic_port_p(pic, v) && (pic_fileno(pic, v)->flag & X_READ) != 0) {
return pic_true_value(pic);
} else {
return pic_false_value(pic);
}
}
static pic_value
pic_port_output_port_p(pic_state *pic)
{
pic_value v;
pic_get_args(pic, "o", &v);
if (pic_port_p(pic, v) && (pic_fileno(pic, v)->flag & X_WRITE) != 0) {
return pic_true_value(pic);
}
else {
return pic_false_value(pic);
}
}
static pic_value
pic_port_port_p(pic_state *pic)
{
pic_value v;
pic_get_args(pic, "o", &v);
return pic_bool_value(pic, pic_port_p(pic, v));
}
static pic_value
pic_port_eof_object_p(pic_state *pic)
{
pic_value v;
pic_get_args(pic, "o", &v);
return pic_bool_value(pic, pic_eof_p(pic, v));
}
static pic_value
pic_port_eof_object(pic_state *pic)
{
pic_get_args(pic, "");
return pic_eof_object(pic);
}
static pic_value
pic_port_port_open_p(pic_state *pic)
{
pic_value port;
pic_get_args(pic, "p", &port);
return pic_bool_value(pic, pic_fileno(pic, port)->flag != 0);
}
static pic_value
pic_port_close_port(pic_state *pic)
{
pic_value port;
pic_get_args(pic, "p", &port);
pic_close_port(pic, port);
return pic_undef_value(pic);
}
#define assert_port_profile(port, flags, caller) do { \
if ((pic_fileno(pic, port)->flag & (flags)) != (flags)) { \
switch (flags) { \
case X_WRITE: \
pic_errorf(pic, caller ": expected output port"); \
case X_READ: \
pic_errorf(pic, caller ": expected input port"); \
} \
} \
if (pic_fileno(pic, port)->flag == 0) { \
pic_errorf(pic, caller ": expected open port"); \
} \
} while (0)
static pic_value
pic_port_open_input_bytevector(pic_state *pic)
{
pic_value blob;
unsigned char *buf;
int len;
pic_get_args(pic, "b", &blob);
buf = pic_blob(pic, blob, &len);
return pic_open_port(pic, xfopen_buf(pic, (char *)buf, len, "r"));
}
static pic_value
pic_port_open_output_bytevector(pic_state *pic)
{
pic_get_args(pic, "");
return pic_open_port(pic, xfopen_buf(pic, NULL, 0, "w"));
}
static pic_value
pic_port_get_output_bytevector(pic_state *pic)
{
pic_value port = pic_stdout(pic);
const char *buf;
int len;
pic_get_args(pic, "|p", &port);
assert_port_profile(port, X_WRITE, "get-output-bytevector");
if (xfget_buf(pic, pic_fileno(pic, port), &buf, &len) < 0) {
pic_errorf(pic, "port was not created by open-output-bytevector");
}
return pic_blob_value(pic, (unsigned char *)buf, len);
}
static pic_value
pic_port_read_u8(pic_state *pic){
pic_value port = pic_stdin(pic);
int c;
pic_get_args(pic, "|p", &port);
assert_port_profile(port, X_READ, "read-u8");
if ((c = xfgetc(pic, pic_fileno(pic, port))) == EOF) {
return pic_eof_object(pic);
}
return pic_int_value(pic, c);
}
static pic_value
pic_port_peek_u8(pic_state *pic)
{
int c;
pic_value port = pic_stdin(pic);
pic_get_args(pic, "|p", &port);
assert_port_profile(port, X_READ, "peek-u8");
c = xfgetc(pic, pic_fileno(pic, port));
if (c == EOF) {
return pic_eof_object(pic);
}
else {
xungetc(pic, c, pic_fileno(pic, port));
return pic_int_value(pic, c);
}
}
static pic_value
pic_port_u8_ready_p(pic_state *pic)
{
pic_value port = pic_stdin(pic);
pic_get_args(pic, "|p", &port);
assert_port_profile(port, X_READ, "u8-ready?");
return pic_true_value(pic); /* FIXME: always returns #t */
}
static pic_value
pic_port_read_bytevector(pic_state *pic)
{
pic_value port = pic_stdin(pic);
unsigned char *buf;
int k, i;
pic_get_args(pic, "i|p", &k, &port);
assert_port_profile(port, X_READ, "read-bytevector");
buf = pic_blob(pic, pic_blob_value(pic, NULL, k), NULL);
i = xfread(pic, buf, sizeof(char), k, pic_fileno(pic, port));
if (i == 0) {
return pic_eof_object(pic);
}
return pic_blob_value(pic, buf, i);
}
static pic_value
pic_port_read_bytevector_ip(pic_state *pic)
{
pic_value bv, port;
unsigned char *buf;
int n, start, end, i, len;
n = pic_get_args(pic, "b|pii", &bv, &port, &start, &end);
buf = pic_blob(pic, bv, &len);
switch (n) {
case 1:
port = pic_stdin(pic);
case 2:
start = 0;
case 3:
end = len;
}
VALID_RANGE(pic, len, start, end);
assert_port_profile(port, X_READ, "read-bytevector!");
i = xfread(pic, buf + start, 1, end - start, pic_fileno(pic, port));
if (i == 0) {
return pic_eof_object(pic);
}
return pic_int_value(pic, i);
}
static pic_value
pic_port_write_u8(pic_state *pic)
{
int i;
pic_value port = pic_stdout(pic);
pic_get_args(pic, "i|p", &i, &port);
assert_port_profile(port, X_WRITE, "write-u8");
xfputc(pic, i, pic_fileno(pic, port));
return pic_undef_value(pic);
}
static pic_value
pic_port_write_bytevector(pic_state *pic)
{
pic_value blob;
pic_value port;
unsigned char *buf;
int n, start, end, len, done;
n = pic_get_args(pic, "b|pii", &blob, &port, &start, &end);
buf = pic_blob(pic, blob, &len);
switch (n) {
case 1:
port = pic_stdout(pic);
case 2:
start = 0;
case 3:
end = len;
}
VALID_RANGE(pic, len, start, end);
assert_port_profile(port, X_WRITE, "write-bytevector");
done = 0;
while (done < end - start) {
done += xfwrite(pic, buf + start + done, 1, end - start - done, pic_fileno(pic, port));
/* FIXME: error check... */
}
return pic_undef_value(pic);
}
static pic_value
pic_port_flush(pic_state *pic)
{
pic_value port = pic_stdout(pic);
pic_get_args(pic, "|p", &port);
assert_port_profile(port, X_WRITE, "flush-output-port");
xfflush(pic, pic_fileno(pic, port));
return pic_undef_value(pic);
}
static pic_value
coerce_port(pic_state *pic)
{
pic_value port;
pic_get_args(pic, "p", &port);
return port;
}
#define DEFINE_PORT(pic, name, file) \
pic_defvar(pic, name, pic_open_port(pic, file), coerce)
void
pic_init_port(pic_state *pic)
{
pic_value coerce = pic_lambda(pic, coerce_port, 0);
DEFINE_PORT(pic, "current-input-port", xstdin);
DEFINE_PORT(pic, "current-output-port", xstdout);
DEFINE_PORT(pic, "current-error-port", xstderr);
pic_defun(pic, "port?", pic_port_port_p);
pic_defun(pic, "input-port?", pic_port_input_port_p);
pic_defun(pic, "output-port?", pic_port_output_port_p);
pic_defun(pic, "port-open?", pic_port_port_open_p);
pic_defun(pic, "close-port", pic_port_close_port);
pic_defun(pic, "eof-object?", pic_port_eof_object_p);
pic_defun(pic, "eof-object", pic_port_eof_object);
/* input */
pic_defun(pic, "read-u8", pic_port_read_u8);
pic_defun(pic, "peek-u8", pic_port_peek_u8);
pic_defun(pic, "u8-ready?", pic_port_u8_ready_p);
pic_defun(pic, "read-bytevector", pic_port_read_bytevector);
pic_defun(pic, "read-bytevector!", pic_port_read_bytevector_ip);
/* output */
pic_defun(pic, "write-u8", pic_port_write_u8);
pic_defun(pic, "write-bytevector", pic_port_write_bytevector);
pic_defun(pic, "flush-output-port", pic_port_flush);
/* string I/O */
pic_defun(pic, "open-input-bytevector", pic_port_open_input_bytevector);
pic_defun(pic, "open-output-bytevector", pic_port_open_output_bytevector);
pic_defun(pic, "get-output-bytevector", pic_port_get_output_bytevector);
}