perf tools: Generalize perf_header__adds_read()

Renaming it to perf_header__process_sections() and passing a
callback to handle each feature.

The next changesets will introduce 'perf buildid-list' that will
handle just the HEADER_BUILD_ID table, ignoring all the other
features.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <1258396365-29217-3-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 29 insertions, 2 deletions

diff --git a/tools/perf/util/header.h b/tools/perf/util/header.h
index a22d70b07571..f1b3bf7bdfc1 100644
--- a/tools/perf/util/header.h
+++ b/tools/perf/util/header.h
@@ -15,11 +15,34 @@ struct perf_header_attr {
         off_t id_offset;
 };
 
-#define HEADER_TRACE_INFO                       1
-#define HEADER_BUILD_ID                         2
+enum {
+        HEADER_TRACE_INFO = 1,
+        HEADER_BUILD_ID,
+        HEADER_LAST_FEATURE,
+};
 
 #define HEADER_FEAT_BITS                        256
 
+struct perf_file_section {
+        u64 offset;
+        u64 size;
+};
+
+struct perf_file_header {
+        u64                             magic;
+        u64                             size;
+        u64                             attr_size;
+        struct perf_file_section        attrs;
+        struct perf_file_section        data;
+        struct perf_file_section        event_types;
+        DECLARE_BITMAP(adds_features, HEADER_FEAT_BITS);
+};
+
+struct perf_header;
+
+int perf_file_header__read(struct perf_file_header *self,
+                           struct perf_header *ph, int fd);
+
 struct perf_header {
         int                     frozen;
         int                     attrs, size;
@@ -54,4 +77,8 @@ bool perf_header__has_feat(const struct perf_header *self, int feat);
 
 struct perf_header *perf_header__new(void);
 
+int perf_header__process_sections(struct perf_header *self, int fd,
+                                  int (*process)(struct perf_file_section *self,
+                                                 int feat, int fd));
+
 #endif /* __PERF_HEADER_H */