Const-ify the world (or at least a good part of it)

This patch adds 'const' tags to a number of Asterisk APIs where they are appropriate (where the API already demanded that the function argument not be modified, but the compiler was not informed of that fact). The list includes:

- CLI command handlers
- CLI command handler arguments
- AGI command handlers
- AGI command handler arguments
- Dialplan application handler arguments
- Speech engine API function arguments

In addition, various file-scope and function-scope constant arrays got 'const' and/or 'static' qualifiers where they were missing.

Review: https://reviewboard.asterisk.org/r/251/



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@196072 65c4cc65-6c06-0410-ace0-fbb531ad65f3

1 files changed, 6 insertions, 6 deletions

diff --git a/channels/chan_dahdi.c b/channels/chan_dahdi.c
index da16b57b5..ce490e6ad 100644
--- a/channels/chan_dahdi.c
+++ b/channels/chan_dahdi.c
@@ -620,7 +620,7 @@ struct dahdi_distRings {
 	struct ringContextData ringContext[3];
 };
 
-static char *subnames[] = {
+static const char * const subnames[] = {
 	"Real",
 	"Callwait",
 	"Threeway"
@@ -2364,7 +2364,7 @@ out:
 	return res;
 }
 
-static char *events[] = {
+static const char * const events[] = {
 	"No event",
 	"On hook",
 	"Ring/Answered",
@@ -2409,7 +2409,7 @@ static char *alarm2str(int alm)
 	return alm ? "Unknown Alarm" : "No Alarm";
 }
 
-static char *event2str(int event)
+static const char *event2str(int event)
 {
 	static char buf[256];
 	if ((event < (ARRAY_LEN(events))) && (event > -1))
@@ -3987,11 +3987,11 @@ static void destroy_all_channels(void)
 #if defined(HAVE_PRI)
 static char *dahdi_send_keypad_facility_app = "DAHDISendKeypadFacility";
 
-static int dahdi_send_keypad_facility_exec(struct ast_channel *chan, void *data)
+static int dahdi_send_keypad_facility_exec(struct ast_channel *chan, const char *data)
 {
 	/* Data will be our digit string */
 	struct dahdi_pvt *p;
-	char *digits = (char *) data;
+	const char *digits = (const char *) data;
 
 	if (ast_strlen_zero(digits)) {
 		ast_debug(1, "No digit string sent to application!\n");
@@ -4032,7 +4032,7 @@ static int dahdi_send_keypad_facility_exec(struct ast_channel *chan, void *data)
 #if defined(HAVE_PRI_PROG_W_CAUSE)
 static char *dahdi_send_callrerouting_facility_app = "DAHDISendCallreroutingFacility";
 
-static int dahdi_send_callrerouting_facility_exec(struct ast_channel *chan, void *data)
+static int dahdi_send_callrerouting_facility_exec(struct ast_channel *chan, const char *data)
 {
 	/* Data will be our digit string */
 	struct dahdi_pvt *p;