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control: Allow cset'ing specific values in the multi-value case

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Improve the parser to allow empty elements followed by a comma.
Now amixer works like below for setting only the third element.
  % amixer cset 'IIR1 Band1' ,,200

Reported-and-tested-by: Arun Raghavan <arun@accosted.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2015-06-10 11:56:23 +02:00
parent 18ce3ec9ca
commit 2fd098b587
1 changed files with 3 additions and 0 deletions
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3
src/control/ctlparse.c
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@ -325,6 +325,8 @@ int snd_ctl_ascii_value_parse(snd_ctl_t *handle,
snd_ctl_elem_value_set_id(dst, myid);
for (idx = 0; idx < count && idx < 128 && ptr && *ptr; idx++) {
if (*ptr == ',')
goto skip;
switch (type) {
case SND_CTL_ELEM_TYPE_BOOLEAN:
tmp = 0;
@ -375,6 +377,7 @@ int snd_ctl_ascii_value_parse(snd_ctl_t *handle,
default:
break;
}
skip:
if (!strchr(value, ','))
ptr = value;
else if (*ptr == ',')