buffer: add buffer_remove implementation

rgburke · Aug 20, 2016 · c7df560 · c7df560
1 parent 2b4a550
commit c7df560
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Showing 2 changed files with 12 additions and 0 deletions.
diff --git a/buffer.c b/buffer.c
@@ -59,6 +59,16 @@ bool buffer_put0(Buffer *buf, const char *data) {
 	return buffer_put(buf, data, strlen(data)+1);
 }
 
+bool buffer_remove(Buffer *buf, size_t pos, size_t len) {
+	if (len == 0)
+		return true;
+	if (pos + len > buf->len)
+		return false;
+	memmove(buf->data + pos, buf->data + pos + len, buf->len - pos - len);
+	buf->len -= len;
+	return true;
+}
+
 bool buffer_insert(Buffer *buf, size_t pos, const void *data, size_t len) {
 	if (pos > buf->len)
 		return false;

diff --git a/buffer.h b/buffer.h
@@ -28,6 +28,8 @@ bool buffer_terminate(Buffer*);
 bool buffer_put(Buffer*, const void *data, size_t len);
 /* same but with NUL-terminated data */
 bool buffer_put0(Buffer*, const char *data);
+/* remove len bytes from the buffer starting at pos */
+bool buffer_remove(Buffer*, size_t pos, size_t len);
 /* insert arbitrary data of length len at pos (in [0, buf->len]) */
 bool buffer_insert(Buffer*, size_t pos, const void *data, size_t len);
 /* insert NUL-terminate data at pos (in [0, buf->len]) */