perf tools: Cleanup calc_data_size logic

It's for calculating whole trace data size during reading.  However
relation functions are called only in this file, no need to
conditionalize it with tricky +1 offset and rename the variable to
more meaningful name like trace_data_size.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/1363850332-25297-10-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/util/trace-event-read.c b/tools/perf/util/trace-event-read.c
index 644ad3b..af215c0 100644 (file)
--- a/tools/perf/util/trace-event-read.c
+++ b/tools/perf/util/trace-event-read.c
@@ -43,7 +43,7 @@ int file_bigendian;
 int host_bigendian;
 static int long_size;
 
-static ssize_t calc_data_size;
+static ssize_t trace_data_size;
 static bool repipe;
 
 static int __do_read(int fd, void *buf, int size)
@@ -83,8 +83,7 @@ static int do_read(void *data, int size)
                return -1;
        }
 
-       if (calc_data_size)
-               calc_data_size += r;
+       trace_data_size += r;
 
        return r;
 }
@@ -155,8 +154,7 @@ static char *read_string(void)
                        break;
        }
 
-       if (calc_data_size)
-               calc_data_size += size;
+       trace_data_size += size;
 
        str = malloc(size);
        if (str)
@@ -356,9 +354,7 @@ ssize_t trace_report(int fd, struct pevent **ppevent, bool __repipe)
 
        *ppevent = NULL;
 
-       calc_data_size = 1;
        repipe = __repipe;
-
        input_fd = fd;
 
        if (do_read(buf, 3) < 0)
@@ -417,8 +413,7 @@ ssize_t trace_report(int fd, struct pevent **ppevent, bool __repipe)
        if (err)
                goto out;
 
-       size = calc_data_size - 1;
-       calc_data_size = 0;
+       size = trace_data_size;
        repipe = false;
 
        if (show_funcs) {