[PATCH 12/18] perf data ctf: Add value_set_string() helper

From: Arnaldo Carvalho de Melo
Date: Mon Jun 27 2016 - 17:05:44 EST


From: Wang Nan <wangnan0@xxxxxxxxxx>

There are many value_set_##x helper for integer, but only for integer.
This patch adds value_set_string() helper to help following commits
create string fields.

Signed-off-by: Wang Nan <wangnan0@xxxxxxxxxx>
Acked-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Zefan Li <lizefan@xxxxxxxxxx>
Cc: pi3orama@xxxxxxx
Link: http://lkml.kernel.org/r/1466767332-114472-2-git-send-email-wangnan0@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
tools/perf/util/data-convert-bt.c | 30 ++++++++++++++++++++++++++++++
1 file changed, 30 insertions(+)

diff --git a/tools/perf/util/data-convert-bt.c b/tools/perf/util/data-convert-bt.c
index 7b1bc24c382e..4b68e7b9ee0c 100644
--- a/tools/perf/util/data-convert-bt.c
+++ b/tools/perf/util/data-convert-bt.c
@@ -141,6 +141,36 @@ FUNC_VALUE_SET(s64)
FUNC_VALUE_SET(u64)
__FUNC_VALUE_SET(u64_hex, u64)

+static int string_set_value(struct bt_ctf_field *field, const char *string);
+static __maybe_unused int
+value_set_string(struct ctf_writer *cw, struct bt_ctf_event *event,
+ const char *name, const char *string)
+{
+ struct bt_ctf_field_type *type = cw->data.string;
+ struct bt_ctf_field *field;
+ int ret = 0;
+
+ field = bt_ctf_field_create(type);
+ if (!field) {
+ pr_err("failed to create a field %s\n", name);
+ return -1;
+ }
+
+ ret = string_set_value(field, string);
+ if (ret) {
+ pr_err("failed to set value %s\n", name);
+ goto err_put_field;
+ }
+
+ ret = bt_ctf_event_set_payload(event, name, field);
+ if (ret)
+ pr_err("failed to set payload %s\n", name);
+
+err_put_field:
+ bt_ctf_field_put(field);
+ return ret;
+}
+
static struct bt_ctf_field_type*
get_tracepoint_field_type(struct ctf_writer *cw, struct format_field *field)
{
--
2.7.4