Asset loading

src/asset/asset.c

@@ -12,14 +12,62 @@
 #include "asset/assettype.h"
 #include "engine/engine.h"
 #include "debug/debug.h"
+#include "util/string.h"
 
 errorret_t assetInit(void) {
   memoryZero(&ASSET, sizeof(asset_t));
 
   #if DOLPHIN
+    // Init FAT driver.
+    if(!fatInitDefault()) errorThrow("Failed to initialize FAT filesystem.");
+
+    char_t **dolphinSearchPath = (char_t **)ASSET_DOLPHIN_PATHS;
+    char_t foundPath[FILENAME_MAX];
+    foundPath[0] = '\0';
+    do {
+      // Try open dir
+      DIR *pdir = opendir(*dolphinSearchPath);
+      if(pdir == NULL) continue;
+
+      // Scan if file is present
+      while(true) {
+        struct dirent* pent = readdir(pdir);
+        if(pent == NULL) break;
+        
+        if(stringCompareInsensitive(pent->d_name, ASSET_FILE) != 0) {
+          continue;
+        }
+
+        // Copy out filename
+        snprintf(
+          foundPath,
+          FILENAME_MAX,
+          "%s%s",
+          *dolphinSearchPath,
+          ASSET_FILE
+        );
+        break;
+      }
+
+      // Close dir.
+      closedir(pdir);
+
+      // Did we find the file here?
+      if(foundPath[0] != '\0') break;
+    } while(*(++dolphinSearchPath) != NULL);
+
+    // Did we find the asset file?
+    if(foundPath[0] == '\0') {
+      errorThrow("Failed to find asset file on FAT filesystem.");
+    }
+
+    ASSET.zip = zip_open(foundPath, ZIP_RDONLY, NULL);
+    if(ASSET.zip == NULL) {
+      errorThrow("Failed to open asset file on FAT filesystem.");
+    }
     errorOk();
   #endif
-  
+
   // Engine may have been provided the launch path
   if(ENGINE.argc > 0) {
     // Get the directory of the executable

src/asset/asset.h

@@ -9,27 +9,46 @@
 #include "error/error.h"
 #include "assettype.h"
 
-#if ASSET_TYPE == wad
-  #if PSP
-    #define ASSET_PBP_READ_PBP_FROM_HOST 0
-    #define ASSET_PBP_SIGNATURE_SIZE 4
-    #define ASSET_PBP_SIGNATURE "\0PBP"
+#if PSP
+  #define ASSET_PBP_READ_PBP_FROM_HOST 0
+  #define ASSET_PBP_SIGNATURE_SIZE 4
+  #define ASSET_PBP_SIGNATURE "\0PBP"
+
+  typedef struct {
+    char_t signature[ASSET_PBP_SIGNATURE_SIZE];
+    uint32_t version;
+    uint32_t sfoOffset;
+    uint32_t icon0Offset;
+    uint32_t icon1Offset;
+    uint32_t pic0Offset;
+    uint32_t pic1Offset;
+    uint32_t snd0Offset;
+    uint32_t pspOffset;
+    uint32_t psarOffset;
+  } assetpbp_t;
+
+#elif DOLPHIN
+  #include <fat.h>
+  #include <stdio.h>
+  #include <stdlib.h>
+  #include <string.h>
+  #include <dirent.h>
+  #include <sys/types.h>
+  #include <sys/stat.h>
+  #include <unistd.h>
+
+  static const char_t *ASSET_DOLPHIN_PATHS[] = {
+    "/",
+    "/Dusk",
+    "%s/dusk",
+    "%s/DUSK",
+    "%s/apps",
+    "%s/apps/Dusk",
+    "%s/apps/dusk",
+    "%s/apps/DUSK",
+    NULL
+  };
 
-    typedef struct {
-      char_t signature[ASSET_PBP_SIGNATURE_SIZE];
-      uint32_t version;
-      uint32_t sfoOffset;
-      uint32_t icon0Offset;
-      uint32_t icon1Offset;
-      uint32_t pic0Offset;
-      uint32_t pic1Offset;
-      uint32_t snd0Offset;
-      uint32_t pspOffset;
-      uint32_t psarOffset;
-    } assetpbp_t;
-  #endif
-#else
-  #error "Unsupported ASSET_TYPE"
 #endif
 
 #define ASSET_FILE "dusk.dsk"