buffer: Support length == 0 for ply_buffer_append_bytes

Right now callers of ply_buffer_append_bytes have to be
very careful to make sure the data they're appending is
non-zero in length. This is kind of inconvenient, since
it's not unusual for data to come in that's zero bytes
long.

For simplicity, this commit just makes
ply_buffer_append_bytes support that use case.

diff --git a/src/libply/ply-buffer.c b/src/libply/ply-buffer.c
index 7392ee6b048ef30257e3cde6aea036bfdd53ec0f..e91eb0d6b357007f9f83703483714e91370c1a72 100644 (file)
--- a/src/libply/ply-buffer.c
+++ b/src/libply/ply-buffer.c
@@ -181,10 +181,12 @@ ply_buffer_append_bytes (ply_buffer_t *buffer,
 {
         assert (buffer != NULL);
         assert (bytes_in != NULL);
-        assert (length != 0);
 
         const uint8_t *bytes = bytes_in;
 
+        if (length == 0)
+                return;
+
         if (length > PLY_BUFFER_MAX_BUFFER_CAPACITY) {
                 bytes += length - (PLY_BUFFER_MAX_BUFFER_CAPACITY - 1);
                 length = (PLY_BUFFER_MAX_BUFFER_CAPACITY - 1);
@@ -257,4 +259,3 @@ ply_buffer_clear (ply_buffer_t *buffer)
         memset (buffer->data, '\0', buffer->capacity);
         buffer->size = 0;
 }
-