Properly split long IRC messages

This commit adds handling of long IRC messages to the core. In contrast
to the `splitlong.pl' plugin, multi-byte encoded and recoded messages
are properly split.

To allow for this, a new function has been added to the server struct:
`split_message'. `split_message' returns a string array with the message
splitted to substrings of a length that the server can handle. If a
protocol module doesn't have any limit, it can simply return a singleton
array with a copy of the message.

The `MSG' chat command now calls `split_message' before `send_message',
and emits `message own_public' / `message own_private' with each
substring, so that the string splitting will be visible in the UI.

`split_message' in the IRC module uses `recode_split' which in turn uses
iconv to properly split multi-byte encoded (and recoded) messages.

1 files changed, 16 insertions, 5 deletions

diff --git a/src/core/chat-commands.c b/src/core/chat-commands.c
index 535bf9f8..e00e6b1a 100644
--- a/src/core/chat-commands.c
+++ b/src/core/chat-commands.c
@@ -378,12 +378,23 @@ static void cmd_msg(const char *data, SERVER_REC *server, WI_ITEM_REC *item)
 		}
 	}
 	if (target != NULL) {
-		signal_emit("server sendmsg", 4, server, target, msg,
-			    GINT_TO_POINTER(target_type));
+		char **splitmsgs = server->split_message(server, target, msg);
+		char *m;
+		int n = 0;
+
+		while ((m = splitmsgs[n++])) {
+			signal_emit("server sendmsg", 4, server, target, m,
+				    GINT_TO_POINTER(target_type));
+			signal_emit(target_type == SEND_TARGET_CHANNEL ?
+			            "message own_public" :
+				    "message own_private", 4, server, m,
+				    target, origtarget);
+		}
+		g_strfreev(splitmsgs);
+	} else {
+		signal_emit("message own_private", 4, server, msg, target,
+			    origtarget);
 	}
-	signal_emit(target != NULL && target_type == SEND_TARGET_CHANNEL ?
-		    "message own_public" : "message own_private", 4,
-		    server, msg, target, origtarget);
 
 	if (free_ret && target != NULL) g_free(target);
 	cmd_params_free(free_arg);