protocol/Result: move current_command to class Response

src/client/Response.cxx

@@ -20,7 +20,6 @@
 #include "config.h"
 #include "Response.hxx"
 #include "Client.hxx"
-#include "protocol/Result.hxx"
 #include "util/FormatString.hxx"
 
 #include <string.h>
@@ -66,7 +65,7 @@ void
 Response::FormatError(enum ack code, const char *fmt, ...)
 {
 	Format("ACK [%i@%u] {%s} ",
-	       (int)code, list_index, current_command);
+	       (int)code, list_index, command);
 
 	va_list args;
 	va_start(args, fmt);

src/client/Response.hxx

@@ -37,13 +37,22 @@ class Response {
 	 */
 	const unsigned list_index;
 
+	/**
+	 * This command's name.  Used to generate error messages.
+	 */
+	const char *command;
+
 public:
 	Response(Client &_client, unsigned _list_index)
-		:client(_client), list_index(_list_index) {}
+		:client(_client), list_index(_list_index), command("") {}
 
 	Response(const Response &) = delete;
 	Response &operator=(const Response &) = delete;
 
+	void SetCommand(const char *_command) {
+		command = _command;
+	}
+
 	bool Write(const void *data, size_t length);
 	bool Write(const char *data);
 	bool FormatV(const char *fmt, va_list args);

src/command/AllCommands.cxx

@@ -33,7 +33,6 @@
 #include "OtherCommands.hxx"
 #include "Permission.hxx"
 #include "tag/TagType.h"
-#include "protocol/Result.hxx"
 #include "Partition.hxx"
 #include "client/Client.hxx"
 #include "client/Response.hxx"
@@ -343,8 +342,6 @@ static const struct command *
 command_checked_lookup(Response &r, unsigned permission,
 		       const char *cmd_name, Request args)
 {
-	current_command = "";
-
 	const struct command *cmd = command_lookup(cmd_name);
 	if (cmd == nullptr) {
 		r.FormatError(ACK_ERROR_UNKNOWN,
@@ -352,7 +349,7 @@ command_checked_lookup(Response &r, unsigned permission,
 		return nullptr;
 	}
 
-	current_command = cmd->cmd;
+	r.SetCommand(cmd->cmd);
 
 	if (!command_check_request(cmd, r, permission, args))
 		return nullptr;
@@ -372,18 +369,13 @@ command_process(Client &client, unsigned num, char *line)
 
 	Tokenizer tokenizer(line);
 
-	const char *const cmd_name = current_command =
-		tokenizer.NextWord(error);
+	const char *const cmd_name = tokenizer.NextWord(error);
 	if (cmd_name == nullptr) {
-		current_command = "";
-
 		if (tokenizer.IsEnd())
 			r.FormatError(ACK_ERROR_UNKNOWN, "No command given");
 		else
 			r.Error(ACK_ERROR_UNKNOWN, error.GetMessage());
 
-		current_command = nullptr;
-
 		/* this client does not speak the MPD protocol; kick
 		   the connection */
 		return CommandResult::FINISH;
@@ -397,7 +389,6 @@ command_process(Client &client, unsigned num, char *line)
 	while (true) {
 		if (args.size == COMMAND_ARGV_MAX) {
 			r.Error(ACK_ERROR_ARG, "Too many arguments");
-			current_command = nullptr;
 			return CommandResult::ERROR;
 		}
 
@@ -407,7 +398,6 @@ command_process(Client &client, unsigned num, char *line)
 				break;
 
 			r.Error(ACK_ERROR_UNKNOWN, error.GetMessage());
-			current_command = nullptr;
 			return CommandResult::ERROR;
 		}
 
@@ -424,7 +414,5 @@ command_process(Client &client, unsigned num, char *line)
 		? cmd->handler(client, args, r)
 		: CommandResult::ERROR;
 
-	current_command = nullptr;
-
 	return ret;
 }

src/protocol/Result.cxx

@@ -21,8 +21,6 @@
 #include "Result.hxx"
 #include "client/Client.hxx"
 
-const char *current_command;
-
 void
 command_success(Client &client)
 {

src/protocol/Result.hxx

@@ -24,8 +24,6 @@
 
 class Client;
 
-extern const char *current_command;
-
 void
 command_success(Client &client);