ex-03: Comment code

exercise-03-rgb/main.c

@@ -40,6 +40,7 @@ int main() {
 		return EXIT_FAILURE;
 	}
 
+	// Strip out any whitespaces
 	char* dst = input;
 	for(char * src = input; *src; src++) {
 		if(!isspace(*src)) {
@@ -49,6 +50,10 @@ int main() {
 	*dst = '\0';
 
 	int trimmed_len = strlen(input);
+
+	// Check whether the provided input
+	// starts with rgb(
+	// and ends with )
 	if(strncmp(input, "rgb(", 4) != 0 || input[trimmed_len - 1] != ')') {
 		debug("%s not in rgb(xxx) format", input);
 		return invalid_input();
@@ -60,10 +65,13 @@ int main() {
 	char* token = strtok(slice, ",");
 
 	for(int i = 0; i < 3; i++) {
+		// strtok reached end prematurely
 		if(token == NULL) {
 			debug("Too few numbers");
 			return invalid_input();
 		}
+
+		// Not a number
 		if(!is_numeric(token)) {
 			debug("%s is not a number", token);
 			return invalid_input();