ext/redcarpet/buffer.c in redcarpet-1.13.1 vs ext/redcarpet/buffer.c in redcarpet-1.13.2

@@ -186,11 +186,11 @@
 /* bufnullterm • NUL-termination of the string array (making a C-string) */
 void
 bufnullterm(struct buf *buf) {
 	if (!buf || !buf->unit) return;
 	if (buf->size < buf->asize && buf->data[buf->size] == 0) return;
-	if (bufgrow(buf, buf->size + 1))
+	if (buf->size + 1 <= buf->asize || bufgrow(buf, buf->size + 1))
 		buf->data[buf->size] = 0; }
 
 
 /* bufprintf • formatted printing to a buffer */
 void
@@ -203,11 +203,13 @@
 
 
 /* bufput • appends raw data to a buffer */
 void
 bufput(struct buf *buf, const void *data, size_t len) {
-	if (!buf || !bufgrow(buf, buf->size + len)) return;
+	if (!buf) return;
+	if (buf->size + len > buf->asize && !bufgrow(buf, buf->size + len))
+		return;
 	memcpy(buf->data + buf->size, data, len);
 	buf->size += len; }
 
 
 /* bufputs • appends a NUL-terminated string to a buffer */
@@ -217,10 +219,12 @@
 
 
 /* bufputc • appends a single char to a buffer */
 void
 bufputc(struct buf *buf, char c) {
-	if (!buf || !bufgrow(buf, buf->size + 1)) return;
+	if (!buf) return;
+	if (buf->size + 1 > buf->asize && !bufgrow(buf, buf->size + 1))
+		return;
 	buf->data[buf->size] = c;
 	buf->size += 1; }
 
 
 /* bufrelease • decrease the reference count and free the buffer if needed */