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;
+}