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

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From: Wang Nan <wangnan0@huawei.com>

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@huawei.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1466767332-114472-2-git-send-email-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 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

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[GIT PULL 00/18] perf/core improvements and fixes Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-06-27 23:10 +0200
  [PATCH 09/18] perf record: Prepare reading from multiple evlists in record__mmap_read_all() Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-06-27 23:10 +0200
  [PATCH 16/18] perf data ctf: Generate comm event to CTF output Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-06-27 23:10 +0200
  [PATCH 06/18] perf build: Add libbabeltrace to build-test Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-06-27 23:10 +0200
  [PATCH 08/18] perf record: Move mmap setup block to separate function Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-06-27 23:10 +0200
  [PATCH 11/18] perf symbols: Use proper dso name for is_regular_file Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-06-27 23:10 +0200
  [PATCH 13/18] perf data ctf: Pass convert options through opts structure Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-06-27 23:10 +0200
  [PATCH 07/18] perf data convert: Include config.h header Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-06-27 23:10 +0200
  [PATCH 15/18] perf data ctf: Prepare collect non-sample events Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-06-27 23:10 +0200
  [PATCH 12/18] perf data ctf: Add value_set_string() helper Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-06-27 23:10 +0200
  [PATCH 18/18] perf data ctf: Generate fork and exit events to CTF output Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-06-27 23:10 +0200
  [PATCH 17/18] perf data ctf: Add '--all' option for 'perf data convert' Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-06-27 23:10 +0200
  [PATCH 02/18] perf tools: Update makefile message for installing slang devel package Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-06-27 23:10 +0200
  Re: [GIT PULL 00/18] perf/core improvements and fixes Ingo Molnar <mingo@kernel.org> - 2016-06-28 09:10 +0200
    Re: [GIT PULL 00/18] perf/core improvements and fixes Jiri Olsa <jolsa@redhat.com> - 2016-06-28 10:30 +0200
    Re: [GIT PULL 00/18] perf/core improvements and fixes Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-06-28 16:10 +0200
      Re: [GIT PULL 00/18] perf/core improvements and fixes Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-06-28 16:20 +0200
      Re: [GIT PULL 00/18] perf/core improvements and fixes Ingo Molnar <mingo@kernel.org> - 2016-06-29 11:40 +0200

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