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#include <stdio.h>
#include "compat.h"
#ifndef HAVE_FGETLN
#ifdef HAVE_GETLINE
extern int getline (char **lineptr, size_t *n, FILE *stream);
#else
/* The interface here is that of GNU libc's getline */
static int
getline (char **lineptr, size_t *n, FILE *stream)
{
#define EXPAND_CHUNK 16
int n_read = 0;
char *line = *lineptr;
if (lineptr == NULL) return -1;
if (n == NULL) return -1;
if (stream == NULL) return -1;
if (*lineptr == NULL || *n == 0) return -1;
#ifdef HAVE_FLOCKFILE
flockfile (stream);
#endif
while (1)
{
int c;
#ifdef HAVE_FLOCKFILE
c = getc_unlocked (stream);
#else
c = getc (stream);
#endif
if (c == EOF)
{
if (n_read > 0)
line[n_read] = '\0';
break;
}
if (n_read + 2 >= *n)
{
size_t new_size;
if (*n == 0)
new_size = 16;
else
new_size = *n * 2;
if (*n >= new_size) /* Overflowed size_t */
line = NULL;
else
line = (char *) (*lineptr ? (char*) realloc(*lineptr, new_size) :
(char*) malloc(new_size));
if (line)
{
*lineptr = line;
*n = new_size;
}
else
{
if (*n > 0)
{
(*lineptr)[*n - 1] = '\0';
n_read = *n - 2;
}
break;
}
}
line[n_read] = c;
n_read++;
if (c == '\n')
{
line[n_read] = '\0';
break;
}
}
#ifdef HAVE_FLOCKFILE
funlockfile (stream);
#endif
return n_read - 1;
}
#endif /* ! HAVE_GETLINE */
char *fgetln(FILE *stream, size_t *len)
{
char *ptr = NULL;
int sz;
size_t length= 0;
sz = getline(&ptr, &length, stream);
if(len) {
*len = sz;
}
return sz >= 0 ? ptr : NULL;
}
#endif
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