From 0b44a0315b47dd8eced9f3b7f31580cf14bbfc01 Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Sat, 12 Feb 2011 00:22:29 -0500 Subject: initial check-in, version 0.5.0 --- src/stdio/getdelim.c | 59 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+) create mode 100644 src/stdio/getdelim.c (limited to 'src/stdio/getdelim.c') diff --git a/src/stdio/getdelim.c b/src/stdio/getdelim.c new file mode 100644 index 00000000..f770d20b --- /dev/null +++ b/src/stdio/getdelim.c @@ -0,0 +1,59 @@ +#include "stdio_impl.h" + +#define MIN(a,b) ((a)<(b) ? (a) : (b)) + +ssize_t getdelim(char **s, size_t *n, int delim, FILE *f) +{ + char *tmp; + unsigned char *z; + size_t k; + size_t i=0; + + if (!n || !s) { + errno = EINVAL; + return -1; + } + + if (!*s) *n=0; + + FLOCK(f); + + while (!feof(f)) { + z = memchr(f->rpos, delim, f->rend - f->rpos); + k = z ? z - f->rpos + 1 : f->rend - f->rpos; + if (i+k >= *n) { + if (k >= SIZE_MAX-i) goto oom; + *n = i+k+1; + if (*n < SIZE_MAX/2) *n *= 2; + tmp = realloc(*s, *n); + if (!tmp) { + *n = i+k+1; + tmp = realloc(*s, *n); + if (!tmp) goto oom; + } + *s = tmp; + } + memcpy(*s+i, f->rpos, k); + f->rpos += k; + i += k; + if (z) break; + __underflow(f); + } + (*s)[i] = 0; + if (feof(f) || ferror(f)) { + FUNLOCK(f); + return -1; + } + + FUNLOCK(f); + + if (i > SSIZE_MAX) { + errno = EOVERFLOW; + return -1; + } + + return i; +oom: + errno = ENOMEM; + return -1; +} -- cgit v1.2.1