47 lines
1.4 KiB
C
47 lines
1.4 KiB
C
/*
|
|
* Copyright (c) 2011, 2012, 2014 Jonas 'Sortie' Termansen.
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
|
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*
|
|
* stdio/fgets_unlocked.c
|
|
* Reads a string from a FILE.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <errno.h>
|
|
|
|
char* fgets_unlocked(char* restrict dest, int size, FILE* restrict fp)
|
|
{
|
|
if ( size <= 0 )
|
|
return errno = EINVAL, (char*) NULL;
|
|
int i;
|
|
for ( i = 0; i < size-1; i++ )
|
|
{
|
|
int c = fgetc_unlocked(fp);
|
|
if ( c == EOF )
|
|
break;
|
|
dest[i] = c;
|
|
if ( c == '\n' )
|
|
{
|
|
i++;
|
|
break;
|
|
}
|
|
}
|
|
if ( !i && (ferror_unlocked(fp) || feof_unlocked(fp)) )
|
|
return NULL;
|
|
// TODO: The end-of-file state is lost here if feof(fp) and we are reading
|
|
// from a terminal that encountered a soft EOF.
|
|
dest[i] = '\0';
|
|
return dest;
|
|
}
|