Add lttng_dynamic_buffer_append_view util

Add lttng_dynamic_buffer_append_view() which appends the contents
of a buffer view to a dynamic buffer.

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Change-Id: I4082ba2c848b79aa2116847987067453638de441

diff --git a/src/common/dynamic-buffer.c b/src/common/dynamic-buffer.c
index aef80dded0bab2785820f7cf8acb1f7b9071cf7b..9aa0bb3c94800068222eec05b98d52d4d4cf3fa9 100644 (file)
--- a/src/common/dynamic-buffer.c
+++ b/src/common/dynamic-buffer.c
@@ -16,6 +16,7 @@
  */
 
 #include <common/dynamic-buffer.h>
+#include <common/buffer-view.h>
 #include <common/utils.h>
 #include <assert.h>
 
@@ -93,6 +94,23 @@ end:
        return ret;
 }
 
+LTTNG_HIDDEN
+int lttng_dynamic_buffer_append_view(struct lttng_dynamic_buffer *buffer,
+               const struct lttng_buffer_view *src)
+{
+       int ret;
+
+       if (!buffer || !src) {
+               ret = -1;
+               goto end;
+       }
+
+       ret = lttng_dynamic_buffer_append(buffer, src->data,
+                       src->size);
+end:
+       return ret;
+}
+
 LTTNG_HIDDEN
 int lttng_dynamic_buffer_set_size(struct lttng_dynamic_buffer *buffer,
                size_t new_size)

diff --git a/src/common/dynamic-buffer.h b/src/common/dynamic-buffer.h
index cd23ccad4d4d45fcdc59254328180daf39b51586..efd63fb9c3bb27638c32a571274f8e28416949b9 100644 (file)
--- a/src/common/dynamic-buffer.h
+++ b/src/common/dynamic-buffer.h
@@ -22,6 +22,8 @@
 #include <stdint.h>
 #include <common/macros.h>
 
+struct lttng_buffer_view;
+
 struct lttng_dynamic_buffer {
        char *data;
        /* size is the buffer's currently used capacity. */
@@ -58,6 +60,15 @@ LTTNG_HIDDEN
 int lttng_dynamic_buffer_append_buffer(struct lttng_dynamic_buffer *dst_buffer,
                struct lttng_dynamic_buffer *src_buffer);
 
+/*
+ * Performs the same action as lttng_dynamic_buffer_append(), but using a
+ * buffer view as the source buffer. The source buffer's size is used in lieu
+ * of "len".
+ */
+LTTNG_HIDDEN
+int lttng_dynamic_buffer_append_view(struct lttng_dynamic_buffer *buffer,
+               const struct lttng_buffer_view *view);
+
 /*
  * Set the buffer's size to new_size. The capacity of the buffer will
  * be expanded (if necessary) to accomodate new_size. Areas acquired by