From 67f54274bd3a059038df89921de0ebd6288adfdf Mon Sep 17 00:00:00 2001
From: Frank van de Pol <fvdpol@home.nl>
Date: Wed, 2 Jun 1999 00:40:31 +0000
Subject: [PATCH] Changed data type of alsa-lib handles from 'void *' to the
 specific type for the handle in use. This should be more type-safe as the
 compiler will perform checking on type now.

---
 alsactl/merge.c | 10 +++++-----
 alsactl/setup.c |  6 ++++--
 amixer/amixer.c | 12 ++++++------
 aplay/aplay.c   |  4 ++--
 4 files changed, 17 insertions(+), 15 deletions(-)

diff --git a/alsactl/merge.c b/alsactl/merge.c
index daf2226..9720455 100644
--- a/alsactl/merge.c
+++ b/alsactl/merge.c
@@ -364,7 +364,7 @@ int soundcard_setup_merge_data(int cardno)
 	return 0;
 }
 
-static int soundcard_open_ctl(void **ctlhandle, struct soundcard *soundcard)
+static int soundcard_open_ctl(snd_ctl_t **ctlhandle, struct soundcard *soundcard)
 {
 	int err;
 
@@ -377,7 +377,7 @@ static int soundcard_open_ctl(void **ctlhandle, struct soundcard *soundcard)
 	return 0;
 }
 
-static int soundcard_open_mix(void **mixhandle, struct soundcard *soundcard, struct mixer *mixer)
+static int soundcard_open_mix(snd_mixer_t **mixhandle, struct soundcard *soundcard, struct mixer *mixer)
 {
 	int err;
 
@@ -393,7 +393,7 @@ static int soundcard_open_mix(void **mixhandle, struct soundcard *soundcard, str
 int soundcard_setup_process_switches(int cardno)
 {
 	int err;
-	void *ctlhandle = NULL;
+	snd_ctl_t *ctlhandle = NULL;
 	struct soundcard *soundcard;
 	struct ctl_switch *ctlsw;
 	struct mixer *mixer;
@@ -461,8 +461,8 @@ int soundcard_setup_process_switches(int cardno)
 int soundcard_setup_process_data(int cardno)
 {
 	int err;
-	void *ctlhandle = NULL;
-	void *mixhandle = NULL;
+	snd_ctl_t *ctlhandle = NULL;
+	snd_mixer_t *mixhandle = NULL;
 	struct soundcard *soundcard;
 	struct mixer *mixer;
 	struct mixer_element *element;
diff --git a/alsactl/setup.c b/alsactl/setup.c
index d59e500..e0b7da9 100644
--- a/alsactl/setup.c
+++ b/alsactl/setup.c
@@ -325,7 +325,8 @@ static int determine_switches(void *handle, struct ctl_switch **csw, int interfa
 
 static int soundcard_setup_collect_switches1(int cardno)
 {
-	void *handle, *mhandle;
+	snd_ctl_t *handle;
+	snd_mixer_t *mhandle;
 	struct soundcard *card, *first, *prev;
 	int err, device;
 	struct mixer *mixer, *mixerprev;
@@ -495,7 +496,8 @@ int soundcard_setup_collect_switches(int cardno)
 
 static int soundcard_setup_collect_data1(int cardno)
 {
-	void *handle, *mhandle;
+	snd_ctl_t *handle; 
+	snd_mixer_t *mhandle;
 	struct soundcard *card;
 	int err, idx;
 	struct mixer *mixer;
diff --git a/amixer/amixer.c b/amixer/amixer.c
index c2983f4..4b0e6eb 100644
--- a/amixer/amixer.c
+++ b/amixer/amixer.c
@@ -101,7 +101,7 @@ static void help(void)
 int info(void)
 {
 	int err;
-	void *handle;
+	snd_mixer_t *handle;
 	snd_mixer_info_t info;
 	
 	if ((err = snd_mixer_open(&handle, card, device)) < 0) {
@@ -645,7 +645,7 @@ int show_element_contents(void *handle, snd_mixer_eid_t *eid, const char *space)
 int elements(void)
 {
 	int err, idx;
-	void *handle;
+	snd_mixer_t *handle;
 	snd_mixer_elements_t elements;
 	snd_mixer_eid_t *element;
 	
@@ -683,7 +683,7 @@ int elements(void)
 int elements_contents(void)
 {
 	int err, idx;
-	void *handle;
+	snd_mixer_t *handle;
 	snd_mixer_elements_t elements;
 	snd_mixer_eid_t *element;
 	
@@ -761,7 +761,7 @@ int show_group(void *handle, snd_mixer_gid_t *gid, const char *space)
 int groups(void)
 {
 	int err, idx;
-	void *handle;
+	snd_mixer_t *handle;
 	snd_mixer_groups_t groups;
 	snd_mixer_gid_t *group;
 	
@@ -1091,7 +1091,7 @@ int eset_mux1(int argc, char *argv[], void *handle, snd_mixer_eid_t *eid)
 int eset(int argc, char *argv[])
 {
 	int err;
-	void *handle;
+	snd_mixer_t *handle;
 	snd_mixer_eid_t eid;
 
 	if (argc < 1) {
@@ -1147,7 +1147,7 @@ int eset(int argc, char *argv[])
 int eget(int argc, char *argv[])
 {
 	int err;
-	void *handle;
+	snd_mixer_t *handle;
 	snd_mixer_eid_t eid;
 
 	if (argc < 1) {
diff --git a/aplay/aplay.c b/aplay/aplay.c
index a74288f..2e2db94 100644
--- a/aplay/aplay.c
+++ b/aplay/aplay.c
@@ -51,7 +51,7 @@
 /* global data */
 
 char *command;
-void *pcm_handle;
+snd_pcm_t *pcm_handle;
 struct snd_pcm_playback_info pinfo;
 struct snd_pcm_record_info rinfo;
 snd_pcm_format_t rformat, format;
@@ -160,7 +160,7 @@ static void usage(char *command)
 
 static void device_list(void)
 {
-	void *handle;
+	snd_ctl_t *handle;
 	int card, err, dev, idx;
 	unsigned int mask;
 	struct snd_ctl_hw_info info;
-- 
2.47.1