Hack clang into checking uiFmt format strings

chat.h

@@ -45,10 +45,18 @@ void uiRead(void);
 void uiTopic(const wchar_t *topic);
 void uiTopicStr(const char *topic);
 void uiLog(const wchar_t *line);
-
-//__attribute__((format(printf, 1, 2)))
 void uiFmt(const wchar_t *format, ...);
 
+// HACK: clang won't check wchar_t *format strings.
+#ifdef NDEBUG
+#define uiFmt(format, ...) uiFmt(L##format, __VA_ARGS__)
+#else
+#define uiFmt(format, ...) do { \
+	snprintf(NULL, 0, format, __VA_ARGS__); \
+	uiFmt(L##format, __VA_ARGS__); \
+} while(0)
+#endif
+
 void handle(char *line);
 void input(wchar_t *line);
 

handle.c

@@ -59,7 +59,7 @@ static void handle432(char *prefix, char *params) {
 	shift(&params);
 	char *mesg = shift(&params);
 	uiLog(L"You can't use that name here");
-	uiFmt(L"Sheriff says, \"%s\"", mesg);
+	uiFmt("Sheriff says, \"%s\"", mesg);
 	uiLog(L"Type /nick <name> to choose a new one");
 }
 
@@ -82,7 +82,7 @@ static void handleJoin(char *prefix, char *params) {
 		chat.user = strdup(user);
 	}
 	uiFmt(
-		L"\3%d%s\3 arrives in \3%d%s\3",
+		"\3%d%s\3 arrives in \3%d%s\3",
 		color(user), nick, color(chan), chan
 	);
 }
@@ -94,12 +94,12 @@ static void handlePart(char *prefix, char *params) {
 	if (params) {
 		char *mesg = shift(&params);
 		uiFmt(
-			L"\3%d%s\3 leaves \3%d%s\3, \"%s\"",
+			"\3%d%s\3 leaves \3%d%s\3, \"%s\"",
 			color(user), nick, color(chan), chan, mesg
 		);
 	} else {
 		uiFmt(
-			L"\3%d%s\3 leaves \3%d%s\3",
+			"\3%d%s\3 leaves \3%d%s\3",
 			color(user), nick, color(chan), chan
 		);
 	}
@@ -112,11 +112,11 @@ static void handleQuit(char *prefix, char *params) {
 		char *mesg = shift(&params);
 		char *quot = (mesg[0] == '"') ? "" : "\"";
 		uiFmt(
-			L"\3%d%s\3 leaves, %s%s%s",
+			"\3%d%s\3 leaves, %s%s%s",
 			color(user), nick, quot, mesg, quot
 		);
 	} else {
-		uiFmt(L"\3%d%s\3 leaves", color(user), nick);
+		uiFmt("\3%d%s\3 leaves", color(user), nick);
 	}
 }
 
@@ -127,7 +127,7 @@ static void handleKick(char *prefix, char *params) {
 	char *kick = shift(&params);
 	char *mesg = shift(&params);
 	uiFmt(
-		L"\3%d%s\3 kicks \3%d%s\3 out of \3%d%s\3, \"%s\"",
+		"\3%d%s\3 kicks \3%d%s\3 out of \3%d%s\3, \"%s\"",
 		color(user), nick, color(kick), kick, color(chan), chan, mesg
 	);
 }
@@ -138,7 +138,7 @@ static void handle332(char *prefix, char *params) {
 	char *chan = shift(&params);
 	char *topic = shift(&params);
 	uiFmt(
-		L"The sign in \3%d%s\3 reads, \"%s\"",
+		"The sign in \3%d%s\3 reads, \"%s\"",
 		color(chan), chan, topic
 	);
 	uiTopicStr(topic);
@@ -150,7 +150,7 @@ static void handleTopic(char *prefix, char *params) {
 	char *chan = shift(&params);
 	char *topic = shift(&params);
 	uiFmt(
-		L"\3%d%s\3 places a new sign in \3%d%s\3, \"%s\"",
+		"\3%d%s\3 places a new sign in \3%d%s\3, \"%s\"",
 		color(user), nick, color(chan), chan, topic
 	);
 	uiTopicStr(topic);
@@ -191,7 +191,7 @@ static void handle315(char *prefix, char *params) {
 	char *chan = shift(&params);
 	who.len = 0;
 	uiFmt(
-		L"In \3%d%s\3 are %s",
+		"In \3%d%s\3 are %s",
 		color(chan), chan, who.buf
 	);
 }
@@ -205,7 +205,7 @@ static void handleNick(char *prefix, char *params) {
 		chat.nick = strdup(next);
 	}
 	uiFmt(
-		L"\3%d%s\3 is now known as \3%d%s\3",
+		"\3%d%s\3 is now known as \3%d%s\3",
 		color(user), prev, color(user), next
 	);
 }
@@ -217,9 +217,9 @@ static void handlePrivmsg(char *prefix, char *params) {
 	char *mesg = shift(&params);
 	if (mesg[0] == '\1') {
 		strsep(&mesg, " ");
-		uiFmt(L"* \3%d%s\3 %s", color(user), nick, strsep(&mesg, "\1"));
+		uiFmt("* \3%d%s\3 %s", color(user), nick, strsep(&mesg, "\1"));
 	} else {
-		uiFmt(L"<\3%d%s\3> %s", color(user), nick, mesg);
+		uiFmt("<\3%d%s\3> %s", color(user), nick, mesg);
 	}
 }
 
@@ -229,7 +229,7 @@ static void handleNotice(char *prefix, char *params) {
 	char *chan = shift(&params);
 	char *mesg = shift(&params);
 	if (strcmp(chat.chan, chan)) return;
-	uiFmt(L"-\3%d%s\3- %s", color(user), nick, mesg);
+	uiFmt("-\3%d%s\3- %s", color(user), nick, mesg);
 }
 
 static const struct {

input.c

@@ -98,5 +98,5 @@ void input(wchar_t *input) {
 		COMMANDS[i].handler(input);
 		return;
 	}
-	uiFmt(L"/%ls isn't a recognized command", command);
+	uiFmt("/%ls isn't a recognized command", command);
 }

irc.c

@@ -99,7 +99,7 @@ void ircFmt(const char *format, ...) {
 	int len = vasprintf(&buf, format, ap);
 	va_end(ap);
 	if (!buf) err(EX_OSERR, "vasprintf");
-	if (chat.verbose) uiFmt(L"<<< %.*s", len - 2, buf);
+	if (chat.verbose) uiFmt("<<< %.*s", len - 2, buf);
 	ircWrite(buf, len);
 	free(buf);
 }
@@ -119,7 +119,7 @@ void ircRead(void) {
 	char *crlf, *line = buf;
 	while ((crlf = strnstr(line, "\r\n", &buf[len] - line))) {
 		crlf[0] = '\0';
-		if (chat.verbose) uiFmt(L">>> %s", line);
+		if (chat.verbose) uiFmt(">>> %s", line);
 		handle(line);
 		line = &crlf[2];
 	}

ui.c

@@ -28,6 +28,7 @@
 #include <wctype.h>
 
 #include "chat.h"
+#undef uiFmt
 
 #define MIN(a, b) ((a) < (b) ? (a) : (b))
 #define MAX(a, b) ((a) > (b) ? (a) : (b))