Please...

xuxuxu.c

@@ -44,19 +44,19 @@ static int fetch_width (char * data) {
 	int image_width = 0;
 	int count       = 0;
 
-	for (; * data != '\0'; ++data) {
-		++count;
-
-		if (* data == '\t')
-			count += TAB_WIDTH - 1;
-
-		if (* data == '\n') {
+	do {
+		if (* data == '\t') {
+			count += TAB_WIDTH;
+		} else if (* data == '\n') {
+			++count;
 			image_width = (count > image_width)
 			            ? count
 			            : image_width;
 			count = 0;
+		} else {
+			++count;
 		}
-	}
+	} while (* (++data) != '\0');
 
 	return (image_width - 1);
 }
@@ -64,9 +64,11 @@ static int fetch_width (char * data) {
 static int fetch_height (char * data) {
 	int image_height = 0;
 
-	for (; * data != '\0'; ++data)
-		if (* data == '\n')
-			image_height++;
+	do {
+		if (* data == '\n') {
+			++image_height;
+		}
+	} while (* (++data) != '\0');
 
 	return (image_height + 1);
 }
@@ -107,55 +109,48 @@ static void fetch_font_glyph (unsigned int * glyph, const char character) {
 		0X000C18187018180C, 0X000000000062D68C, 0X0000000000000000
 	};
 
-	              int byte_mark = 0;
+	              int offset    = 0;
 	unsigned long int font_code = 0;
 
 	font_code = font_code_list [(int) character];
 
-	for (byte_mark = 0; byte_mark != FONT_WIDTH * FONT_HEIGHT; ++byte_mark)
-		glyph [byte_mark] = ((font_code >> byte_mark) % 2)
-		          ? select
-		          : BACKGROUND;
+	do {
+		glyph [offset] = ((font_code >> offset) & 1)
+		               ? select
+		               : BACKGROUND;
+	} while (++offset != FONT_WIDTH * FONT_HEIGHT);
 }
 
 static void render_character (char character) {
 	unsigned int glyph [FONT_WIDTH * FONT_HEIGHT] = { 0 };
 
-	int i = 0;
+	int offset = 0;
 
 	fetch_font_glyph (glyph, character);
 
-	for (i = 0; i != FONT_WIDTH * FONT_HEIGHT; ++i) {
-		int u = i / FONT_WIDTH + y;
-		int v = i % FONT_WIDTH + x;
+	do {
+		int u = offset / FONT_WIDTH + y;
+		int v = offset % FONT_WIDTH + x;
 
-		render [u * width + v] = glyph [i];
-	}
+		render [u * width + v] = glyph [offset];
+	} while (++offset != FONT_WIDTH * FONT_HEIGHT);
 
 	x += FONT_WIDTH + 1;
 }
 
 static void render_string (char * string, int length) {
-	int i = 0;
+	int offset = 0;
 
-	for (i = 0; (i != string_length (string)) && (i != length); ++i) {
-		if (string [i] == '\t') {
+	do {
+		if (string [offset] == '\t') {
 			x += FONT_WIDTH * TAB_WIDTH;
-		} else if (string [i] == '\n') {
+		} else if (string [offset] == '\n') {
 			y += FONT_HEIGHT + 1;
-			x = 1;
+			x  = 1;
 		} else {
-			render_character (string [i] - ' ');
+			render_character (string [offset] - ' ');
 		}
-	}
-}
-
-static void render_base (void) {
-	int i = 0;
-
-	for (i = 0; i != width * height; ++i) {
-		render [i] = BACKGROUND;
-	}
+	} while (++offset != length);
 }
 
 int main (void) {
@@ -197,7 +192,11 @@ int main (void) {
 
 	render = allocate (4 * width * height);
 
-	render_base ();
+	do {
+		render [offset] = BACKGROUND;
+	} while (++offset != width * height);
+
+	offset = 0;
 
 	do {
 		int colour = 0;