use SDL_RWops to read obj models

src/resource/model.c

@@ -100,7 +100,12 @@ static void free_obj(ObjFileData *data) {
 }
 
 static void parse_obj(const char *filename, ObjFileData *data) {
-	FILE *fp = fopen(filename, "rb");
+	SDL_RWops *rw = SDL_RWFromFile(filename, "r");
+
+	if(!rw) {
+		warnx("%s(): SDL_RWFromFile() failed: %s", __func__, SDL_GetError());
+		return;
+	}
 
 	char line[256];
 	Vector buf;
@@ -109,7 +114,7 @@ static void parse_obj(const char *filename, ObjFileData *data) {
 
 	memset(data, 0, sizeof(ObjFileData));
 
-	while(fgets(line, sizeof(line), fp)) {
+	while(SDL_RWgets(rw, line, sizeof(line))) {
 		linen++;
 
 		char *first;
@@ -192,7 +197,7 @@ static void parse_obj(const char *filename, ObjFileData *data) {
 		}
 	}
 
-	fclose(fp);
+	SDL_RWclose(rw);
 }
 
 Model* get_model(const char *name) {

src/util.c

@@ -370,6 +370,22 @@ void png_init_rwops(png_structp png, SDL_RWops *rwops) {
     png_set_read_fn(png, rwops, png_rwops_read_data);
 }
 
+char* SDL_RWgets(SDL_RWops *rwops, char *buf, size_t bufsize) {
+    char c, *ptr = buf, *end = buf + bufsize - 1;
+    assert(end > ptr);
+
+    while((c = SDL_ReadU8(rwops)) && ptr <= end) {
+        if((*ptr++ = c) == '\n')
+            break;
+    }
+
+    if(ptr == buf)
+        return NULL;
+
+    *ptr = 0;
+    return buf;
+}
+
 //
 // misc utils
 //

src/util.h

@@ -99,6 +99,8 @@ Hashtable* parse_keyvalue_stream(SDL_RWops *strm, size_t tablesize);
 Hashtable* parse_keyvalue_file(const char *filename, size_t tablesize);
 void png_init_rwops(png_structp png, SDL_RWops *rwops);
 
+char* SDL_RWgets(SDL_RWops *rwops, char *buf, size_t bufsize);
+
 //
 // misc utils
 //