From 6aea41e619e9ec72167483465ca959715faa8e55 Mon Sep 17 00:00:00 2001
From: Andre Noll <maan@tuebingen.mpg.de>
Date: Wed, 14 Jan 2015 00:52:02 +0100
Subject: [PATCH] command_util.bash: Kill make_proto().

It is always a bad idea to parse C code with a regex in a script. In
addition, it is completely unnecessary in this case.

This commit changes command_util.bash to define, in addition to the
old XXX_CMD_ARRAY, another preprocessor macro XXX__COMMAND_HANDLERS
containing the comma separated list of command handlers without
any type information instead of grepping the source files. A simple
typedef is used to declare all command handlers.

Avoiding all the grep/sed calls reduces the (warm cache) make dep
time by ~10%.
---
 audiod_command.c  |  5 ++++-
 command.c         |  6 +++++-
 command_util.bash | 32 +++++++++-----------------------
 play.c            |  8 ++++++--
 4 files changed, 24 insertions(+), 27 deletions(-)

diff --git a/audiod_command.c b/audiod_command.c
index 2b18837b..68cc15fb 100644
--- a/audiod_command.c
+++ b/audiod_command.c
@@ -35,11 +35,14 @@
 extern struct sched sched;
 extern char *stat_item_values[NUM_STAT_ITEMS];
 
+typedef int audiod_command_handler_t(int, int, char **);
+static audiod_command_handler_t AUDIOD_COMMAND_HANDLERS;
+
 /* Defines one command of para_audiod. */
 struct audiod_command {
 	const char *name;
 	/* Pointer to the function that handles the command. */
-	int (*handler)(int, int, char **);
+	audiod_command_handler_t *handler;
 	/* One-line description. */
 	const char *description;
 	/* Summary of the command line options. */
diff --git a/command.c b/command.c
index 5d6a0990..eac09f05 100644
--- a/command.c
+++ b/command.c
@@ -40,12 +40,16 @@
 #include "signal.h"
 #include "version.h"
 
+typedef int server_command_handler_t(struct command_context *);
+static server_command_handler_t SERVER_COMMAND_HANDLERS;
+server_command_handler_t AFS_COMMAND_HANDLERS;
+
 /* Defines one command of para_server. */
 struct server_command {
 	/* The name of the command. */
 	const char *name;
 	/* Pointer to the function that handles the command. */
-	int (*handler)(struct command_context *);
+	server_command_handler_t *handler;
 	/* The privileges a user must have to execute this command. */
 	unsigned int perms;
 	/* One-line description of the command. */
diff --git a/command_util.bash b/command_util.bash
index e33e0769..5e9dbcc7 100755
--- a/command_util.bash
+++ b/command_util.bash
@@ -162,24 +162,9 @@ com_man()
 	done
 }
 
-make_proto()
+cmd_handler_name()
 {
-	local regex='\(__noreturn \)*\(static \)*int com_'
-	local source_file match="" all_commands CR='
-'
-	if test -n "$prototype"; then
-		result="$prototype$CR"
-		return
-	fi
-	all_commands="$(cat $source_files | grep "$regex")"
-	result=
-	for source_file in $source_files; do
-		match=$(grep "$regex$name_txt(" <<< "$all_commands" | head -n 1 | sed -e 's/$/;/1')
-		if test -n "$match"; then
-			result="$result$match$CR"
-			break
-		fi
-	done
+	result="com_$name_txt,"
 }
 
 make_array_member()
@@ -239,7 +224,7 @@ template_loop()
 
 com_header()
 {
-	local array_members CR='
+	local array_members handlers= CR='
 '
 
 	while : ; do
@@ -251,19 +236,20 @@ com_header()
 			break
 		fi
 		if test $template -eq 0; then
-			make_proto
-			printf "%s" "$result"
+			cmd_handler_name
+			handlers+="$result"
 			make_array_member
 			array_members="$array_members$result"
 			continue
 		fi
-		template_loop make_proto
-		printf "%s" "$result"
+		template_loop cmd_handler_name
+		handlers+="$result"
 		template_loop make_array_member
 		array_members="$array_members$result"
 	done
 	array_members="$array_members{.name = NULL} \\$CR"
-	echo "#define DEFINE_$(tr 'a-z' 'A-Z' <<< "$base_name")_CMD_ARRAY $array_members"
+	echo "#define DEFINE_${base_name^^}_CMD_ARRAY $array_members"
+	echo "#define ${base_name^^}_COMMAND_HANDLERS ${handlers%,}"
 }
 
 com_completion()
diff --git a/play.c b/play.c
index 4fb20500..61c30aed 100644
--- a/play.c
+++ b/play.c
@@ -633,16 +633,20 @@ static char **get_mapped_keyseqs(void)
 	return result;
 }
 
+#include "play.command_list.h"
+
+typedef int play_command_handler_t(struct play_task *, int, char**);
+static play_command_handler_t PLAY_COMMAND_HANDLERS;
+
 /* defines one command of para_play */
 struct pp_command {
 	const char *name;
-	int (*handler)(struct play_task *, int, char**);
+	play_command_handler_t *handler;
 	const char *description;
 	const char *usage;
 	const char *help;
 };
 
-#include "play.command_list.h"
 static struct pp_command pp_cmds[] = {DEFINE_PLAY_CMD_ARRAY};
 #define FOR_EACH_COMMAND(c) for (c = 0; pp_cmds[c].name; c++)
 
-- 
2.39.5