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/* Copyright (C) 2004 Manuel Novoa III <mjn3@codepoet.org>
*
* GNU Library General Public License (LGPL) version 2 or later.
*
* Dedicated to Toni. See uClibc/DEDICATION.mjn3 for details.
*/
#include <features.h>
#ifdef __USE_GNU
#include "_stdio.h"
/* Note: There is a defect in this function. (size_t vs ssize_t). */
/* glibc function --
* Return -1 if error or EOF prior to any chars read.
* Return number of chars read (including possible delimiter but not
* the terminating nul) otherwise.
*
* NOTE: If we need to allocate a buffer, we do so prior to attempting
* a reading. So space may be allocated even if initially at EOF.
*/
#define GETDELIM_GROWBY 64
ssize_t getdelim(char **__restrict lineptr, size_t *__restrict n,
int delimiter, register FILE *__restrict stream)
{
register char *buf;
ssize_t pos = -1;
int c;
__STDIO_AUTO_THREADLOCK_VAR;
if (!lineptr || !n || !stream) { /* Be compatable with glibc... even */
__set_errno(EINVAL); /* though I think we should assert here */
} else {
__STDIO_AUTO_THREADLOCK(stream);
if (!(buf = *lineptr)) { /* If passed NULL for buffer, */
*n = 0; /* ignore value passed and treat size as 0. */
}
/* Within the loop, pos is actually the current buffer index + 2,
* because we want to make sure we have enough space to store
* an additional char plus a nul terminator.
*/
pos = 1;
do {
if (pos >= *n) {
if (!(buf = realloc(buf, *n + GETDELIM_GROWBY))) {
pos = -1;
break;
}
*n += GETDELIM_GROWBY;
*lineptr = buf;
}
if ((c = __GETC_UNLOCKED(stream)) != EOF) {
buf[++pos - 2] = c;
if (c != delimiter) {
continue;
}
}
/* We're done, so correct pos back to being the current index. */
if ((pos -= 2) >= 0) {
buf[++pos] = 0;
}
break;
} while (1);
__STDIO_AUTO_THREADUNLOCK(stream);
}
return pos;
}
libc_hidden_def(getdelim)
#endif
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