added scene file validation

src/corelib/scene.c

@@ -57,6 +57,14 @@ int fpeekc(FILE* file) {
 	return c;
 }
 
+static
+void freadto(FILE* file, char c) {
+	char read;
+	do {
+		read = fgetc(file);
+	} while(read != c);
+}
+
 static
 int nextnw(FILE* file) {
 	int next;
@@ -75,6 +83,8 @@ void _parse_key(FILE* file, char* out) {
 		c = fgetc(file);
 		if(c == ':') {
 			*out = '\0';
+		} else if(c == '#') {
+			freadto(file, '\n');
 		} else if(!isspace(c)) {
 			*out = c;
 			++out;
@@ -91,6 +101,9 @@ void _parse_value(FILE* file, char* out, int* _argc, char** argv) {
 	do {
 		c = fgetc(file);
 		switch(c) {
+		case '#':
+			freadto(file, '\n');
+			break;
 		case ';':
 			*out = '\0';
 			break;
@@ -138,8 +151,7 @@ void _parse_config(FILE* file) {
 }
 
 static
-void _parse_scene(const char* filename) {
-	FILE* file = fopen(filename, "r");
+void _parse_scene(FILE* file) {
 	int next;
 	do {
 		_parse_config(file);
@@ -148,13 +160,53 @@ void _parse_scene(const char* filename) {
 	} while(next != EOF);
 }
 
-void load_scene(const char* file) {
-	world_clear();
-	_parse_scene(file);
+static
+int _validate_config(FILE* file) {
+	char c;
+	int colon_count = 0;
+	do {
+		c = nextnw(file);
+		switch(c) {
+		default: break;
+		case ':':
+			colon_count++;
+			break;
+		}
+	} while(c != ';');
+
+	return colon_count == 1;
 }
 
-void load_scene_additive(const char* file) {
-	printf("parsing scene\n");
-	_parse_scene(file);
-	printf("parsed scene\n");
+static
+int _validate_scene(FILE* file) {
+	if(file == NULL) return 0;
+
+	int next;
+	int validated;
+	do {
+		validated = _validate_config(file);
+		next = nextnw(file);
+		ungetc(next, file);
+	} while(validated == 1 && next != EOF);
+
+	rewind(file);
+
+	return validated;
+}
+
+void load_scene(const char* filename) {
+	FILE* file = fopen(filename, "r");
+	if(_validate_scene(file)) {
+		world_clear();
+		_parse_scene(file);
+		fclose(file);
+	}
+}
+
+void load_scene_additive(const char* filename) {
+	FILE* file = fopen(filename, "r");
+	if(_validate_scene(file)) {
+		_parse_scene(file);
+		fclose(file);
+	}
 }