Implement table saving functionality

game_payload/include/core.h

@@ -5,3 +5,5 @@
 #include <game.h>
 
 void core_setup_patcher(struct game_data *game, HMODULE baseModule);
+
+void *core_perform_tx(size_t *outLength);

game_payload/include/utils.h

@@ -2,7 +2,11 @@
 
 #include <stdint.h>
 
-int utils_file_exists(const wchar_t *filePath);
+int utils_path_exists(const wchar_t *filePath);
 uint32_t utils_file_crc32c(const wchar_t *filePath);
 
+void utils_create_dir_recursively(const wchar_t *path);
+
+void utils_save_to_file(const wchar_t *filePath, const void *buf, size_t length);
+
 char utils_env_enabled(const char *env);

game_payload/src/main.c

@@ -55,8 +55,24 @@ static void _run_game(struct game_data *game) {
 }
 
 static void _run_tx(struct game_data *game, wchar_t *tableFile) {
+    // Load unpatched base module
+    HMODULE baseModule = LoadLibraryA(game->base_module_name);
+    if (!baseModule) {
+        msg_err_a("Failed to load base module: %s", game->base_module_name);
+    }
 
+    // ...more magic
+    size_t tableSize;
+    void *table = core_perform_tx(&tableSize);
 
+    // Save to file
+    utils_create_dir_recursively(tableFile);
+    utils_save_to_file(tableFile, table, tableSize);
+
+    // Cleanup
+    free(table);
+
+    // The file should now exist: restart and launch the game
     request_restart();
     exit(0);
 }
@@ -80,10 +96,7 @@ BOOL WINAPI DllMain(HINSTANCE instance, DWORD reason, LPVOID reserved) {
     wchar_t tableFile[MAX_PATH];
     tx_table_file(&game, tableFile);
 
-    // Remove this
-    msg_err_w(tableFile);
-
-    if (1) {
+    if (utils_path_exists(tableFile)) {
         _run_game(&game);
     } else {
         _run_tx(&game, tableFile);

game_payload/src/utils.c

@@ -5,7 +5,7 @@
 
 #include <utils.h>
 
-int utils_file_exists(const wchar_t *filePath) {
+int utils_path_exists(const wchar_t *filePath) {
     return GetFileAttributesW(filePath) != INVALID_FILE_ATTRIBUTES;
 }
 
@@ -33,6 +33,36 @@ uint32_t utils_file_crc32c(const wchar_t *filePath) {
     return crc;
 }
 
+// https://stackoverflow.com/a/16719260
+void utils_create_dir_recursively(const wchar_t *path) {
+    wchar_t dir[MAX_PATH];
+    ZeroMemory(dir, MAX_PATH * sizeof(wchar_t));
+
+    wchar_t *end = wcschr(path, L'\\');
+
+    while(end != NULL)
+    {
+        wcsncpy(dir, path, end - path + 1);
+
+        if (!utils_path_exists(dir) && !CreateDirectoryW(dir, NULL)) {
+            msg_err_w(L"Failed to create directory: %ls", dir);
+        }
+
+        end = wcschr(++end, L'\\');
+    }
+}
+
+void utils_save_to_file(const wchar_t *filePath, const void *buf, size_t length) {
+    HANDLE file = CreateFileW(filePath, FILE_WRITE_ACCESS, FILE_SHARE_READ, NULL, CREATE_NEW, FILE_ATTRIBUTE_NORMAL, NULL);
+    if (!file) {
+        msg_err_w(L"Could not open file: %ls", filePath);
+    }
+
+    WriteFile(file, buf, length, NULL, FALSE);
+
+    CloseHandle(file);
+}
+
 char utils_env_enabled(const char *env) {
     char *envText = getenv(env);
     return envText && *envText;