From: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Date: Fri, 15 May 2020 20:04:11 +0000 (-0400)
Subject: Add lttng_dynamic_buffer_append_view util
X-Git-Tag: v2.12.2~48
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=fdd678b6b3297015dd48e94ddb6b05bbfb5f5d43;p=lttng-tools.git

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 1ae2fa2c5..fadd4505a 100644
--- a/src/common/dynamic-buffer.c
+++ b/src/common/dynamic-buffer.c
@@ -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)
diff --git a/src/common/dynamic-buffer.h b/src/common/dynamic-buffer.h
index 1f27f7403..821745a98 100644
--- a/src/common/dynamic-buffer.h
+++ b/src/common/dynamic-buffer.h
@@ -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,
 		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