efficiency tweaks

dmenu.c

@@ -25,8 +25,8 @@ struct Item {
 
 static void appenditem(Item *item, Item **list, Item **last);
 static void calcoffsets(void);
+static char *cistrstr(const char *s, const char *sub);
 static void drawmenu(void);
-static char *fstrstr(const char *s, const char *sub);
 static void grabkeyboard(void);
 static void insert(const char *str, ssize_t n);
 static void keypress(XKeyEvent *ev);
@@ -60,6 +60,7 @@ static Item *prev, *curr, *next, *sel;
 static Window win;
 
 static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
+static char *(*fstrstr)(const char *, const char *) = strstr;
 
 int
 main(int argc, char *argv[]) {
@@ -76,8 +77,10 @@ main(int argc, char *argv[]) {
 			topbar = False;
 		else if(!strcmp(argv[i], "-f"))
 			fast = True;
-		else if(!strcmp(argv[i], "-i"))
+		else if(!strcmp(argv[i], "-i")) {
 			fstrncmp = strncasecmp;
+			fstrstr = cistrstr;
+		}
 		else if(i+1 == argc)
 			usage();
 		/* double flags */
@@ -112,7 +115,7 @@ main(int argc, char *argv[]) {
 	setup();
 	run();
 
-	return EXIT_FAILURE;  /* should not reach */
+	return EXIT_FAILURE; /* unreachable */
 }
 
 void
@@ -121,6 +124,7 @@ appenditem(Item *item, Item **list, Item **last) {
 		*list = item;
 	else
 		(*last)->right = item;
+
 	item->left = *last;
 	item->right = NULL;
 	*last = item;
@@ -143,6 +147,16 @@ calcoffsets(void) {
 			break;
 }
 
+char *
+cistrstr(const char *s, const char *sub) {
+	size_t len;
+
+	for(len = strlen(sub); *s; s++)
+		if(!strncasecmp(s, sub, len))
+			return (char *)s;
+	return NULL;
+}
+
 void
 drawmenu(void) {
 	int curpos;
@@ -188,16 +202,6 @@ drawmenu(void) {
 	mapdc(dc, win, mw, mh);
 }
 
-char *
-fstrstr(const char *s, const char *sub) {
-	size_t len;
-
-	for(len = strlen(sub); *s; s++)
-		if(!fstrncmp(s, sub, len))
-			return (char *)s;
-	return NULL;
-}
-
 void
 grabkeyboard(void) {
 	int i;
@@ -233,58 +237,37 @@ keypress(XKeyEvent *ev) {
 
 		XConvertCase(ksym, &lower, &upper);
 		switch(lower) {
-		default:
+		case XK_a: ksym = XK_Home;      break;
-			return;
+		case XK_b: ksym = XK_Left;      break;
-		case XK_a:
+		case XK_c: ksym = XK_Escape;    break;
-			ksym = XK_Home;
+		case XK_d: ksym = XK_Delete;    break;
-			break;
+		case XK_e: ksym = XK_End;       break;
-		case XK_b:
+		case XK_f: ksym = XK_Right;     break;
-			ksym = XK_Left;
+		case XK_h: ksym = XK_BackSpace; break;
-			break;
+		case XK_i: ksym = XK_Tab;       break;
-		case XK_c:
+		case XK_j: ksym = XK_Return;    break;
-			ksym = XK_Escape;
+		case XK_m: ksym = XK_Return;    break;
-			break;
+		case XK_n: ksym = XK_Up;        break;
-		case XK_d:
+		case XK_p: ksym = XK_Down;      break;
-			ksym = XK_Delete;
+
-			break;
+		case XK_k: /* delete right */
-		case XK_e:
-			ksym = XK_End;
-			break;
-		case XK_f:
-			ksym = XK_Right;
-			break;
-		case XK_h:
-			ksym = XK_BackSpace;
-			break;
-		case XK_i:
-			ksym = XK_Tab;
-			break;
-		case XK_j:
-		case XK_m:
-			ksym = XK_Return;
-			break;
-		case XK_k:  /* delete right */
 			text[cursor] = '\0';
 			match(False);
 			break;
-		case XK_n:
+		case XK_u: /* delete left */
-			ksym = XK_Next;
-			break;
-		case XK_p:
-			ksym = XK_Prior;
-			break;
-		case XK_u:  /* delete left */
 			insert(NULL, 0 - cursor);
 			break;
-		case XK_w:  /* delete word */
+		case XK_w: /* delete word */
 			while(cursor > 0 && text[nextrune(-1)] == ' ')
 				insert(NULL, nextrune(-1) - cursor);
 			while(cursor > 0 && text[nextrune(-1)] != ' ')
 				insert(NULL, nextrune(-1) - cursor);
 			break;
-		case XK_y:  /* paste selection */
+		case XK_y: /* paste selection */
 			XConvertSelection(dc->dpy, XA_PRIMARY, utf8, utf8, win, CurrentTime);
 			return;
+		default:
+			return;
 		}
 	}
 	switch(ksym) {
@@ -297,8 +280,9 @@ keypress(XKeyEvent *ev) {
 			return;
 		cursor = nextrune(+1);
 	case XK_BackSpace:
-		if(cursor > 0)
+		if(cursor == 0)
-			insert(NULL, nextrune(-1) - cursor);
+			return;
+		insert(NULL, nextrune(-1) - cursor);
 		break;
 	case XK_End:
 		if(text[cursor] != '\0') {
@@ -351,7 +335,7 @@ keypress(XKeyEvent *ev) {
 		break;
 	case XK_Return:
 	case XK_KP_Enter:
-		fputs((sel && !(ev->state & ShiftMask)) ? sel->text : text, stdout);
+		puts((sel && !(ev->state & ShiftMask)) ? sel->text : text);
 		exit(EXIT_SUCCESS);
 	case XK_Right:
 		if(text[cursor] != '\0') {
@@ -468,7 +452,7 @@ run(void) {
 		switch(ev.type) {
 		case Expose:
 			if(ev.xexpose.count == 0)
-				drawmenu();
+				mapdc(dc, win, mw, mh);
 			break;
 		case KeyPress:
 			keypress(&ev.xkey);

draw.c

@@ -96,7 +96,7 @@ initdc(void) {
 	DC *dc;
 
 	if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
-		fprintf(stderr, "no locale support\n");
+		fputs("no locale support\n", stderr);
 	if(!(dc = calloc(1, sizeof *dc)))
 		eprintf("cannot malloc %u bytes:", sizeof *dc);
 	if(!(dc->dpy = XOpenDisplay(NULL)))
@@ -153,10 +153,10 @@ resizedc(DC *dc, unsigned int w, unsigned int h) {
 	if(dc->canvas)
 		XFreePixmap(dc->dpy, dc->canvas);
 
-	dc->canvas = XCreatePixmap(dc->dpy, DefaultRootWindow(dc->dpy), w, h,
-	                           DefaultDepth(dc->dpy, DefaultScreen(dc->dpy)));
 	dc->w = w;
 	dc->h = h;
+	dc->canvas = XCreatePixmap(dc->dpy, DefaultRootWindow(dc->dpy), w, h,
+	                           DefaultDepth(dc->dpy, DefaultScreen(dc->dpy)));
 }
 
 int