#include <config.h>
#include "getdelim.h"
#include <limits.h>
#include <stdlib.h>
#include <errno.h>
#ifndef SIZE_MAX
# define SIZE_MAX ((size_t) -1)
#endif
#ifndef SSIZE_MAX
# define SSIZE_MAX ((ssize_t) (SIZE_MAX / 2))
#endif
#if !HAVE_FLOCKFILE
# undef flockfile
# define flockfile(x) ((void) 0)
#endif
#if !HAVE_FUNLOCKFILE
# undef funlockfile
# define funlockfile(x) ((void) 0)
#endif
ssize_t
getdelim (char **lineptr, size_t *n, int delimiter, FILE *fp)
{
ssize_t result;
size_t cur_len = 0;
if (lineptr == NULL || n == NULL || fp == NULL)
{
errno = EINVAL;
return -1;
}
flockfile (fp);
if (*lineptr == NULL || *n == 0)
{
*n = 120;
*lineptr = (char *) malloc (*n);
if (*lineptr == NULL)
{
result = -1;
goto unlock_return;
}
}
for (;;)
{
int i;
i = getc (fp);
if (i == EOF)
{
result = -1;
break;
}
if (cur_len + 1 >= *n)
{
size_t needed_max =
SSIZE_MAX < SIZE_MAX ? (size_t) SSIZE_MAX + 1 : SIZE_MAX;
size_t needed = 2 * *n + 1;
char *new_lineptr;
if (needed_max < needed)
needed = needed_max;
if (cur_len + 1 >= needed)
{
result = -1;
goto unlock_return;
}
new_lineptr = (char *) realloc (*lineptr, needed);
if (new_lineptr == NULL)
{
result = -1;
goto unlock_return;
}
*lineptr = new_lineptr;
*n = needed;
}
(*lineptr)[cur_len] = i;
cur_len++;
if (i == delimiter)
break;
}
(*lineptr)[cur_len] = '\0';
result = cur_len ? cur_len : result;
unlock_return:
funlockfile (fp);
return result;
}