perf hists: Introduce perf_hpp for hist period printing

Current hist print functions are messy because it has to consider many
of command line options and the code doing that is scattered around to
places. So when someone wants to add an option to manipulate the hist
output it'd very easy to miss to update all of them in sync. And things
getting worse as more options/features are added continuously.

So I'd like to refactor them using hpp formats and move common code to
ui/hist.c in order to make it easy to maintain and to add new features.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1346640790-17197-2-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 37 insertions, 0 deletions

diff --git a/tools/perf/util/hist.h b/tools/perf/util/hist.h
index 2e650ff..4146f51 100644
--- a/tools/perf/util/hist.h
+++ b/tools/perf/util/hist.h
@@ -115,6 +115,43 @@ bool hists__new_col_len(struct hists *self, enum hist_column col, u16 len);
 void hists__reset_col_len(struct hists *hists);
 void hists__calc_col_len(struct hists *hists, struct hist_entry *he);
 
+struct perf_hpp {
+	char *buf;
+	size_t size;
+	u64 total_period;
+	const char *sep;
+	long displacement;
+	void *ptr;
+};
+
+struct perf_hpp_fmt {
+	bool cond;
+	int (*header)(struct perf_hpp *hpp);
+	int (*width)(struct perf_hpp *hpp);
+	int (*color)(struct perf_hpp *hpp, struct hist_entry *he);
+	int (*entry)(struct perf_hpp *hpp, struct hist_entry *he);
+};
+
+extern struct perf_hpp_fmt perf_hpp__format[];
+
+enum {
+	PERF_HPP__OVERHEAD,
+	PERF_HPP__OVERHEAD_SYS,
+	PERF_HPP__OVERHEAD_US,
+	PERF_HPP__OVERHEAD_GUEST_SYS,
+	PERF_HPP__OVERHEAD_GUEST_US,
+	PERF_HPP__SAMPLES,
+	PERF_HPP__PERIOD,
+	PERF_HPP__DELTA,
+	PERF_HPP__DISPL,
+
+	PERF_HPP__MAX_INDEX
+};
+
+void perf_hpp__init(bool need_pair, bool show_displacement);
+int hist_entry__period_snprintf(struct perf_hpp *hpp, struct hist_entry *he,
+				bool color);
+
 struct perf_evlist;
 
 #ifdef NO_NEWT_SUPPORT