Add lttng_dynamic_buffer_append_view util
authorJérémie Galarneau <jeremie.galarneau@efficios.com>
Fri, 15 May 2020 20:04:11 +0000 (16:04 -0400)
committerJérémie Galarneau <jeremie.galarneau@efficios.com>
Wed, 20 May 2020 22:38:26 +0000 (18:38 -0400)
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

src/common/dynamic-buffer.c
src/common/dynamic-buffer.h

index 7005ef501776c0801f951e00b3a01aa17c699c85..b6544e62ba5f3f646bd9bd1630a9ca5668b5f190 100644 (file)
@@ -6,6 +6,7 @@
  */
 
 #include <common/dynamic-buffer.h>
+#include <common/buffer-view.h>
 #include <common/utils.h>
 #include <assert.h>
 
@@ -83,6 +84,23 @@ 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)
index 1352a67c103a49206f5feca938761bc261fbb542..3435c846c3bf60054a86339383d96aa8ccb42a97 100644 (file)
@@ -12,6 +12,8 @@
 #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. */
@@ -48,6 +50,15 @@ LTTNG_HIDDEN
 int lttng_dynamic_buffer_append_buffer(struct lttng_dynamic_buffer *dst_buffer,
                const 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 accommodates new_size. Areas acquired by
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