Rich Felker
400c5e5c83
to deal with the fact that the public headers may be used with pre-c99 compilers, __restrict is used in place of restrict, and defined appropriately for any supported compiler. we also avoid the form [restrict] since older versions of gcc rejected it due to a bug in the original c99 standard, and instead use the form *restrict.
62 lines
988 B
C
62 lines
988 B
C
#include "stdio_impl.h"
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#define MIN(a,b) ((a)<(b) ? (a) : (b))
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ssize_t getdelim(char **restrict s, size_t *restrict n, int delim, FILE *restrict f)
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{
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char *tmp;
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unsigned char *z;
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size_t k;
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size_t i=0;
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int c;
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if (!n || !s) {
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errno = EINVAL;
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return -1;
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}
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if (!*s) *n=0;
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FLOCK(f);
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for (;;) {
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z = memchr(f->rpos, delim, f->rend - f->rpos);
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k = z ? z - f->rpos + 1 : f->rend - f->rpos;
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if (i+k >= *n) {
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if (k >= SIZE_MAX/2-i) goto oom;
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*n = i+k+2;
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if (*n < SIZE_MAX/4) *n *= 2;
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tmp = realloc(*s, *n);
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if (!tmp) {
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*n = i+k+2;
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tmp = realloc(*s, *n);
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if (!tmp) goto oom;
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}
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*s = tmp;
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}
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memcpy(*s+i, f->rpos, k);
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f->rpos += k;
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i += k;
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if (z) break;
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if ((c = getc_unlocked(f)) == EOF) {
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if (!i || !feof(f)) {
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FUNLOCK(f);
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return -1;
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}
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break;
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}
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if (((*s)[i++] = c) == delim) break;
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}
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(*s)[i] = 0;
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FUNLOCK(f);
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return i;
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oom:
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FUNLOCK(f);
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errno = ENOMEM;
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return -1;
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}
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weak_alias(getdelim, __getdelim);
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