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devicestate.c: Simplified some logic in _ast_device_state().

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git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/12@409274 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Richard Mudgett
2014-03-01 00:04:47 +00:00
parent 4c840980cf
commit dccc215ba9
1 changed files with 17 additions and 15 deletions
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32
main/devicestate.c
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@@ -297,14 +297,11 @@ static enum ast_device_state devstate_cached(const char *device)
/*! \brief Check device state through channel specific function or generic function */
static enum ast_device_state _ast_device_state(const char *device, int check_cache)
{
char *buf;
char *number;
const struct ast_channel_tech *chan_tech;
enum ast_device_state res;
/*! \brief Channel driver that provides device state */
char *tech;
/*! \brief Another provider of device state */
char *provider = NULL;
/* If the last known state is cached, just return that */
if (check_cache) {
@@ -314,16 +311,18 @@ static enum ast_device_state _ast_device_state(const char *device, int check_cac
}
}
buf = ast_strdupa(device);
tech = strsep(&buf, "/");
if (!(number = buf)) {
number = ast_strdupa(device);
tech = strsep(&number, "/");
if (!number) {
/*! \brief Another provider of device state */
char *provider;
provider = strsep(&tech, ":");
if (!tech) {
return AST_DEVICE_INVALID;
}
/* We have a provider */
number = tech;
tech = NULL;
ast_debug(3, "Checking if I can find provider for \"%s\" - number: %s\n", provider, number);
return getproviderstate(provider, number);
@@ -331,18 +330,21 @@ static enum ast_device_state _ast_device_state(const char *device, int check_cac
ast_debug(4, "No provider found, checking channel drivers for %s - %s\n", tech, number);
if (!(chan_tech = ast_get_channel_tech(tech)))
chan_tech = ast_get_channel_tech(tech);
if (!chan_tech) {
return AST_DEVICE_INVALID;
}
if (!(chan_tech->devicestate)) /* Does the channel driver support device state notification? */
return ast_parse_device_state(device); /* No, try the generic function */
/* Does the channel driver support device state notification? */
if (!chan_tech->devicestate) {
/* No, try the generic function */
return ast_parse_device_state(device);
}
res = chan_tech->devicestate(number);
if (res != AST_DEVICE_UNKNOWN)
return res;
res = ast_parse_device_state(device);
if (res == AST_DEVICE_UNKNOWN) {
res = ast_parse_device_state(device);
}
return res;
}