perf tools: Add filename__read_str util function
authorJiri Olsa <jolsa@redhat.com>
Tue, 3 Dec 2013 13:09:22 +0000 (14:09 +0100)
committerArnaldo Carvalho de Melo <acme@redhat.com>
Wed, 4 Dec 2013 18:20:12 +0000 (15:20 -0300)
commitcef82c9f5a3deab94c1f1f02cfc25213844852ed
tree72bd6003cdb4692b964a5a5b05feb877a5c116bc
parent3d7c0144491bd8c21d53b43032274a85efdfe434
perf tools: Add filename__read_str util function

Adding filename__read_str util function to read
text file and return it in the char array.

The interface is:
  int filename__read_str(const char *filename, char **buf, size_t *sizep)

  Returns 0/-1 if the read suceeded/fail respectively.

  buf  - place to store the data pointer
  size - place to store data size

v2 change:
  - better error handling suggested by Namhyung Kim.

Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Namhyung Kim <namhyung@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/1386076182-14484-9-git-send-email-jolsa@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
tools/perf/util/util.c
tools/perf/util/util.h