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perf tools: Allow '--inherit' as the negation of '--no-inherit'

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Long options can be negated by prefixing them with 'no-'.  However
options that already start with 'no-', such as '--no-inherit' result in
ugly double 'no's.

Avoid that by accepting that the removal of 'no-' also negates the long
option.

Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1384768557-23331-3-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter 2013-11-18 11:55:55 +02:00 committed by Arnaldo Carvalho de Melo
parent 3aa5939d71
commit 4bc437964e
1 changed files with 19 additions and 0 deletions
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19
tools/perf/util/parse-options.c
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@ -224,6 +224,24 @@ static int parse_long_opt(struct parse_opt_ctx_t *p, const char *arg,
return 0;
}
if (!rest) {
if (!prefixcmp(options->long_name, "no-")) {
/*
* The long name itself starts with "no-", so
* accept the option without "no-" so that users
* do not have to enter "no-no-" to get the
* negation.
*/
rest = skip_prefix(arg, options->long_name + 3);
if (rest) {
flags |= OPT_UNSET;
goto match;
}
/* Abbreviated case */
if (!prefixcmp(options->long_name + 3, arg)) {
flags |= OPT_UNSET;
goto is_abbreviated;
}
}
/* abbreviated? */
if (!strncmp(options->long_name, arg, arg_end - arg)) {
is_abbreviated:
@ -259,6 +277,7 @@ is_abbreviated:
if (!rest)
continue;
}
match:
if (*rest) {
if (*rest != '=')
continue;