1#include "stdio_impl.h" 2#include <errno.h> 3#include <inttypes.h> 4#include <string.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 char* tmp; 10 unsigned char* z; 11 size_t k; 12 size_t i = 0; 13 int c; 14 15 FLOCK(f); 16 17 if (!n || !s) { 18 f->flags |= F_ERR; 19 FUNLOCK(f); 20 errno = EINVAL; 21 return -1; 22 } 23 24 if (!*s) 25 *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) 32 goto oom; 33 size_t m = i + k + 2; 34 if (!z && m < SIZE_MAX / 4) 35 m += m / 2; 36 tmp = realloc(*s, m); 37 if (!tmp) { 38 m = i + k + 2; 39 tmp = realloc(*s, m); 40 if (!tmp) 41 goto oom; 42 } 43 *s = tmp; 44 *n = m; 45 } 46 memcpy(*s + i, f->rpos, k); 47 f->rpos += k; 48 i += k; 49 if (z) 50 break; 51 if ((c = getc_unlocked(f)) == EOF) { 52 if (!i || !feof(f)) { 53 FUNLOCK(f); 54 return -1; 55 } 56 break; 57 } 58 if (((*s)[i++] = c) == delim) 59 break; 60 } 61 (*s)[i] = 0; 62 63 FUNLOCK(f); 64 65 return i; 66oom: 67 f->flags |= F_ERR; 68 FUNLOCK(f); 69 errno = ENOMEM; 70 return -1; 71} 72 73weak_alias(getdelim, __getdelim); 74