88 lines
1.8 KiB
C
88 lines
1.8 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2006-2022, RT-Thread Development Team
|
||
|
|
*
|
||
|
|
* SPDX-License-Identifier: Apache-2.0
|
||
|
|
*
|
||
|
|
* Change Logs:
|
||
|
|
* Date Author Notes
|
||
|
|
* 2014-05-22 ivanrad implement getline
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "posix/stdio.h"
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <limits.h>
|
||
|
|
#include <sys/errno.h>
|
||
|
|
|
||
|
|
#ifdef DFS_USING_POSIX
|
||
|
|
ssize_t getdelim(char **lineptr, size_t *n, int delim, FILE *stream)
|
||
|
|
{
|
||
|
|
char *cur_pos, *new_lineptr;
|
||
|
|
size_t new_lineptr_len;
|
||
|
|
int c;
|
||
|
|
|
||
|
|
if (lineptr == NULL || n == NULL || stream == NULL)
|
||
|
|
{
|
||
|
|
errno = EINVAL;
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (*lineptr == NULL)
|
||
|
|
{
|
||
|
|
*n = 128; /* init len */
|
||
|
|
if ((*lineptr = (char *)malloc(*n)) == NULL)
|
||
|
|
{
|
||
|
|
errno = ENOMEM;
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
cur_pos = *lineptr;
|
||
|
|
for (;;)
|
||
|
|
{
|
||
|
|
c = getc(stream);
|
||
|
|
|
||
|
|
if (ferror(stream) || (c == EOF && cur_pos == *lineptr))
|
||
|
|
return -1;
|
||
|
|
|
||
|
|
if (c == EOF)
|
||
|
|
break;
|
||
|
|
|
||
|
|
if ((*lineptr + *n - cur_pos) < 2)
|
||
|
|
{
|
||
|
|
if (LONG_MAX / 2 < *n)
|
||
|
|
{
|
||
|
|
#ifdef EOVERFLOW
|
||
|
|
errno = EOVERFLOW;
|
||
|
|
#else
|
||
|
|
errno = ERANGE; /* no EOVERFLOW defined */
|
||
|
|
#endif
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
new_lineptr_len = *n * 2;
|
||
|
|
|
||
|
|
if ((new_lineptr = (char *)realloc(*lineptr, new_lineptr_len)) == NULL)
|
||
|
|
{
|
||
|
|
errno = ENOMEM;
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
cur_pos = new_lineptr + (cur_pos - *lineptr);
|
||
|
|
*lineptr = new_lineptr;
|
||
|
|
*n = new_lineptr_len;
|
||
|
|
}
|
||
|
|
|
||
|
|
*cur_pos++ = (char)c;
|
||
|
|
|
||
|
|
if (c == delim)
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
*cur_pos = '\0';
|
||
|
|
return (ssize_t)(cur_pos - *lineptr);
|
||
|
|
}
|
||
|
|
|
||
|
|
ssize_t getline(char **lineptr, size_t *n, FILE *stream)
|
||
|
|
{
|
||
|
|
return getdelim(lineptr, n, '\n', stream);
|
||
|
|
}
|
||
|
|
#endif /* DFS_USING_POSIX */
|