buffer: add git_buf_consume

Moves the content after 'end' to the beginning of the buffer

Signed-off-by: Carlos Martín Nieto <carlos@cmartin.tk>

1 files changed, 7 insertions, 0 deletions

diff --git a/src/buffer.c b/src/buffer.c
index 3cdc62f6d..e92b2ef9e 100644
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -98,3 +98,10 @@ void git_buf_clear(git_buf *buf)
 {
 	buf->size = 0;
 }
+
+void git_buf_consume(git_buf *buf, const char *end)
+{
+	size_t consumed = end - buf->ptr;
+	memmove(buf->ptr, end, buf->size - consumed);
+	buf->size -= consumed;
+}