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-rw-r--r--src/stdio/getdelim.c59
1 files changed, 59 insertions, 0 deletions
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;
+}