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Cleanups and new control functions (hfirst, hlast, hnext, hprev, hcount).

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This commit is contained in:
Jaroslav Kysela 2000-08-12 15:33:17 +00:00
parent 56130c04d0
commit 5bb1fcb00a
2 changed files with 53 additions and 2 deletions
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38
src/control/controls.c
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@ -190,6 +190,44 @@ int snd_ctl_hresort(snd_ctl_t *handle, snd_ctl_hsort_t *hsort)
return 0;
}
snd_hcontrol_t *snd_ctl_hfirst(snd_ctl_t *handle)
{
assert(handle != NULL);
if (list_empty(&handle->hlist))
return NULL;
return (snd_hcontrol_t *)list_entry(handle->hlist.next, snd_hcontrol_t, list);
}
snd_hcontrol_t *snd_ctl_hlast(snd_ctl_t *handle)
{
assert(handle != NULL);
if (list_empty(&handle->hlist))
return NULL;
return (snd_hcontrol_t *)list_entry(handle->hlist.prev, snd_hcontrol_t, list);
}
snd_hcontrol_t *snd_ctl_hnext(snd_ctl_t *handle, snd_hcontrol_t *hcontrol)
{
assert(handle != NULL && hcontrol != NULL);
if (hcontrol->list.next == &handle->hlist)
return NULL;
return (snd_hcontrol_t *)list_entry(hcontrol->list.next, snd_hcontrol_t, list);
}
snd_hcontrol_t *snd_ctl_hprev(snd_ctl_t *handle, snd_hcontrol_t *hcontrol)
{
assert(handle != NULL && hcontrol != NULL);
if (hcontrol->list.prev == &handle->hlist)
return NULL;
return (snd_hcontrol_t *)list_entry(hcontrol->list.prev, snd_hcontrol_t, list);
}
int snd_ctl_hcount(snd_ctl_t *handle)
{
assert(handle != NULL);
return handle->hcount;
}
snd_hcontrol_t *snd_ctl_hfind(snd_ctl_t *handle, snd_control_id_t *id)
{
void *res;