| #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; |
| size_t m = i+k+2; |
| if (!z && m < SIZE_MAX/4) m += m/2; |
| tmp = realloc(*s, m); |
| if (!tmp) { |
| m = i+k+2; |
| tmp = realloc(*s, m); |
| if (!tmp) goto oom; |
| } |
| *s = tmp; |
| *n = m; |
| } |
| 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); |