1#include "stdio_impl.h" 2#include <string.h> 3#include <inttypes.h> 4#include <errno.h> 5 6#define MIN(a,b) ((a)<(b) ? (a) : (b)) 7 8ssize_t getdelim(char **restrict s, size_t *restrict n, int delim, FILE *restrict f) 9{ 10 char *tmp; 11 unsigned char *z; 12 size_t k; 13 size_t i=0; 14 int c; 15 16 FLOCK(f); 17 18 if (!n || !s) { 19 f->flags |= F_ERR; 20 FUNLOCK(f); 21 errno = EINVAL; 22 return -1; 23 } 24 25 if (!*s) *n=0; 26 27 for (;;) { 28 z = memchr(f->rpos, delim, f->rend - f->rpos); 29 k = z ? z - f->rpos + 1 : f->rend - f->rpos; 30 if (i+k+1 >= *n) { 31 if (k >= SIZE_MAX/2-i) goto oom; 32 size_t m = i+k+2; 33 if (!z && m < SIZE_MAX/4) m += m/2; 34 tmp = realloc(*s, m); 35 if (!tmp) { 36 m = i+k+2; 37 tmp = realloc(*s, m); 38 if (!tmp) goto oom; 39 } 40 *s = tmp; 41 *n = m; 42 } 43 memcpy(*s+i, f->rpos, k); 44 f->rpos += k; 45 i += k; 46 if (z) break; 47 if ((c = getc_unlocked(f)) == EOF) { 48 if (!i || !feof(f)) { 49 FUNLOCK(f); 50 return -1; 51 } 52 break; 53 } 54 if (((*s)[i++] = c) == delim) break; 55 } 56 (*s)[i] = 0; 57 58 FUNLOCK(f); 59 60 return i; 61oom: 62 f->flags |= F_ERR; 63 FUNLOCK(f); 64 errno = ENOMEM; 65 return -1; 66} 67 68weak_alias(getdelim, __getdelim); 69