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#include "stdio_impl.h"
#include <string.h>
#include <inttypes.h>
#include <errno.h>
#define MIN(a,b) ((a)<(b) ? (a) : (b))
ssize_t getdelim(char **restrict s, size_t *restrict n, int delim, FILE *restrict f)
{
char *tmp;
unsigned char *z;
size_t k;
size_t i=0;
int c;
FLOCK(f);
if (!n || !s) {
f->flags |= F_ERR;
FUNLOCK(f);
errno = EINVAL;
return -1;
}
if (!*s) *n=0;
for (;;) {
z = memchr(f->rpos, delim, f->rend - f->rpos);
k = z ? z - f->rpos + 1 : f->rend - f->rpos;
if (i+k+1 >= *n) {
if (k >= SIZE_MAX/2-i) goto oom;
*n = i+k+2;
if (*n < SIZE_MAX/4) *n *= 2;
tmp = realloc(*s, *n);
if (!tmp) {
*n = i+k+2;
tmp = realloc(*s, *n);
if (!tmp) goto oom;
}
*s = tmp;
}
memcpy(*s+i, f->rpos, k);
f->rpos += k;
i += k;
if (z) break;
if ((c = getc_unlocked(f)) == EOF) {
if (!i || !feof(f)) {
FUNLOCK(f);
return -1;
}
break;
}
if (((*s)[i++] = c) == delim) break;
}
(*s)[i] = 0;
FUNLOCK(f);
return i;
oom:
f->flags |= F_ERR;
FUNLOCK(f);
errno = ENOMEM;
return -1;
}
weak_alias(getdelim, __getdelim);
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