Asset compartmentalized

src/dusklinux/asset/assetlinux.c

@@ -0,0 +1,81 @@
+/**
+ * Copyright (c) 2026 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "asset/asset.h"
+#include "engine/engine.h"
+#include "util/string.h"
+#include "assert/assert.h"
+
+errorret_t assetInitLinux(void) {
+  // Engine may have been provided the launch path
+  if(ENGINE.argc > 0) {
+    // Get the directory of the executable
+    char_t buffer[FILENAME_MAX];
+    stringCopy(buffer, ENGINE.argv[0], FILENAME_MAX);
+    size_t len = strlen(buffer);
+
+    // Normalize slashes
+    for(size_t i = 0; i < FILENAME_MAX; i++) {
+      if(buffer[i] == '\0') break;
+      if(buffer[i] == '\\') buffer[i] = '/';
+    }
+
+    // Now find the last slash
+    char_t *end = buffer + len - 1;
+    do {
+      end--;
+      if(*end == '/') {
+        *end = '\0';
+        break;
+      }
+    } while(end != buffer);
+    
+
+    // Did we find a slash?
+    if(end != buffer) {
+      // We found the directory, set as system path
+      stringCopy(ASSET.platform.systemPath, buffer, FILENAME_MAX);
+    }
+  }
+
+  // Default system path, intended to be overridden by the platform
+  stringCopy(ASSET.platform.systemPath, ".", FILENAME_MAX);
+
+  // Open zip file
+  char_t searchPath[FILENAME_MAX];
+  const char_t **path = ASSET_LINUX_SEARCH_PATHS;
+  int32_t error;
+  do {
+    sprintf(
+      searchPath,
+      *path,
+      ASSET.platform.systemPath,
+      ASSET_FILE_NAME
+    );
+
+    // Try open
+    ASSET.zip = zip_open(searchPath, ZIP_RDONLY, &error);
+    if(ASSET.zip == NULL) continue;
+    if(error != 0) {
+      printf("Warning: Opened asset file with non-zero error code: %d\n", error);
+      ASSET.zip = NULL;
+      continue;
+    }
+    break;// Found!
+  } while(*(++path) != NULL);
+
+  // Did we open the asset?
+  if(ASSET.zip == NULL) {
+    errorThrow("Failed to open asset file.");
+  }
+
+  errorOk();
+}
+
+errorret_t assetDisposeLinux(void) {
+  errorOk();
+}