[PATCH 2/6] perf utils: export parse_single_tracepoint_event

[David Ahern <dsahern@gmail.com>]

For use by perf-record in later patch. Allow strp arg to be NULL
as well.

Signed-off-by: David Ahern <dsahern@gmail.com>
---
 tools/perf/util/parse-events.c |   13 ++++---------
 tools/perf/util/parse-events.h |   12 ++++++++++++
 2 files changed, 16 insertions(+), 9 deletions(-)

diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 41982c3..c15a701 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -19,12 +19,6 @@ struct event_symbol {
 	const char	*alias;
 };
 
-enum event_result {
-	EVT_FAILED,
-	EVT_HANDLED,
-	EVT_HANDLED_ALL
-};
-
 char debugfs_path[MAXPATHLEN];
 
 #define CHW(x) .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_##x
@@ -432,8 +426,8 @@ parse_generic_hw_event(const char **str, struct perf_event_attr *attr)
 	return EVT_HANDLED;
 }
 
-static enum event_result
-parse_single_tracepoint_event(char *sys_name,
+enum event_result
+parse_single_tracepoint_event(const char *sys_name,
 			      const char *evt_name,
 			      unsigned int evt_length,
 			      struct perf_event_attr *attr,
@@ -460,7 +454,8 @@ parse_single_tracepoint_event(char *sys_name,
 	id = atoll(id_buf);
 	attr->config = id;
 	attr->type = PERF_TYPE_TRACEPOINT;
-	*strp += strlen(sys_name) + evt_length + 1; /* + 1 for the ':' */
+	if (strp)
+		*strp += strlen(sys_name) + evt_length + 1; /* + 1 for the ':' */
 
 	attr->sample_type |= PERF_SAMPLE_RAW;
 	attr->sample_type |= PERF_SAMPLE_TIME;
diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h
index 746d3fc..e65f724 100644
--- a/tools/perf/util/parse-events.h
+++ b/tools/perf/util/parse-events.h
@@ -17,6 +17,12 @@ struct tracepoint_path {
 	struct tracepoint_path *next;
 };
 
+enum event_result {
+	EVT_FAILED,
+	EVT_HANDLED,
+	EVT_HANDLED_ALL
+};
+
 extern struct tracepoint_path *tracepoint_id_to_path(u64 config);
 extern bool have_tracepoints(struct list_head *evlist);
 
@@ -26,6 +32,12 @@ extern const char *__event_name(int type, u64 config);
 
 extern int parse_events(const struct option *opt, const char *str, int unset);
 extern int parse_filter(const struct option *opt, const char *str, int unset);
+extern enum event_result
+parse_single_tracepoint_event(const char *sys_name,
+			      const char *evt_name,
+			      unsigned int evt_length,
+			      struct perf_event_attr *attr,
+			      const char **strp);
 
 #define EVENTS_HELP_MAX (128*1024)
 
-- 
1.7.5.2