vis

commit 555720ed0c1403a6eccfba0a7c47834da35e992a
parent be91766e450ea782113a2968e2c266c12f57768d
Author: Marc André Tanner <mat@brain-dump.org>
Date:   Wed, 11 May 2016 20:34:23 +0200

buffer: add utility function to NUL terminate buffer

Diffstat:
M
buffer.c
 | 
5
+++++
M
buffer.h
 | 
2
++

2 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/buffer.c b/buffer.c
@@ -29,6 +29,11 @@ void buffer_truncate(Buffer *buf) {
 	buf->len = 0;
 }
 
+bool buffer_terminate(Buffer *buf) {
+	return !buf->data || buf->len == 0 || buf->data[buf->len-1] == '\0' ||
+	        buffer_append(buf, "\0", 1);
+}
+
 void buffer_release(Buffer *buf) {
 	if (!buf)
 		return;
diff --git a/buffer.h b/buffer.h
@@ -22,6 +22,8 @@ void buffer_clear(Buffer*);
 bool buffer_grow(Buffer*, size_t size);
 /* truncate buffer, but keep associated memory region for further data */
 void buffer_truncate(Buffer*);
+/* if buffer is not empty, make sure it is NUL terminated */
+bool buffer_terminate(Buffer*);
 /* replace buffer content with given data, growing the buffer if needed */
 bool buffer_put(Buffer*, const void *data, size_t len);
 /* same but with NUL-terminated data */