/* kc3
* Copyright 2022,2023,2024 kmx.io <contact@kmx.io>
*
* Permission is hereby granted to use this software granted the above
* copyright notice and this permission paragraph are included in all
* copies and substantial portions of this software.
*
* THIS SOFTWARE IS PROVIDED "AS-IS" WITHOUT ANY GUARANTEE OF
* PURPOSE AND PERFORMANCE. IN NO EVENT WHATSOEVER SHALL THE
* AUTHOR BE CONSIDERED LIABLE FOR THE USE AND PERFORMANCE OF
* THIS SOFTWARE.
*/
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "../libkc3/kc3.h"
static sw buf_getc_refill (s_buf *buf);
void buf_getc_close (s_buf *buf)
{
FILE *fp;
assert(buf);
assert(buf->refill == buf_getc_refill);
assert(buf->user_ptr);
buf->refill = NULL;
fp = buf->user_ptr;
fclose(fp);
}
s_buf * buf_getc_open_r (s_buf *buf, const char *path)
{
FILE *fp;
assert(buf);
assert(! buf->refill);
assert(! buf->user_ptr);
fp = file_open(path, "rb");
if (! fp)
return NULL;
buf->refill = buf_getc_refill;
buf->user_ptr = fp;
return buf;
}
sw buf_getc_refill (s_buf *buf)
{
sw c = 0;
FILE *fp;
uw result = 0;
assert(buf);
assert(buf->user_ptr);
if (buf->rpos > buf->wpos ||
buf->wpos > buf->size)
return -1;
fp = buf->user_ptr;
if (feof(fp))
return 0;
while (buf->wpos < buf->size &&
c != '\n' &&
(c = getc(fp)) != EOF &&
c <= 255) {
if (buf_write_u8(buf, c) < 0)
return -1;
result++;
}
return result;
}
