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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 "_stdio.h"
libc_hidden_proto(fgets_unlocked)
#ifdef __DO_UNLOCKED
libc_hidden_proto(__fgetc_unlocked)
char *fgets_unlocked(char *__restrict s, int n,
register FILE * __restrict stream)
{
register char *p;
int c;
__STDIO_STREAM_VALIDATE(stream);
#ifdef __UCLIBC_MJN3_ONLY__
#warning CONSIDER: What should fgets do if n <= 0?
#endif /* __UCLIBC_MJN3_ONLY__ */
/* Should we assert here? Or set errno? Or just fail... */
if (n <= 0) {
/* __set_errno(EINVAL); */
goto ERROR;
}
p = s;
while (--n) {
if (__STDIO_STREAM_CAN_USE_BUFFER_GET(stream)) {
if ((*p++ = __STDIO_STREAM_BUFFER_GET(stream)) == '\n') {
break;
}
} else {
if ((c = __fgetc_unlocked(stream)) == EOF) {
if (__FERROR_UNLOCKED(stream)) {
goto ERROR;
}
break;
}
if ((*p++ = c) == '\n') {
break;
}
}
}
#ifdef __UCLIBC_MJN3_ONLY__
#warning CONSIDER: If n==1 and not at EOF, should fgets return an empty string?
#endif /* __UCLIBC_MJN3_ONLY__ */
if (p > s) {
*p = 0;
return s;
}
ERROR:
return NULL;
}
libc_hidden_def(fgets_unlocked)
#ifndef __UCLIBC_HAS_THREADS__
libc_hidden_proto(fgets)
strong_alias(fgets_unlocked,fgets)
libc_hidden_def(fgets)
#endif
#elif defined __UCLIBC_HAS_THREADS__
libc_hidden_proto(fgets)
char *fgets(char *__restrict s, int n,
register FILE * __restrict stream)
{
char *retval;
__STDIO_AUTO_THREADLOCK_VAR;
__STDIO_AUTO_THREADLOCK(stream);
retval = fgets_unlocked(s, n, stream);
__STDIO_AUTO_THREADUNLOCK(stream);
return retval;
}
libc_hidden_def(fgets)
#endif
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