diff --git a/examples/core_storage_values.c b/examples/core_storage_values.c new file mode 100644 index 00000000..3190d0a0 --- /dev/null +++ b/examples/core_storage_values.c @@ -0,0 +1,85 @@ +/******************************************************************************************* +* +* raylib [core] example - Storage save/load values +* +* This example has been created using raylib 1.4 (www.raylib.com) +* raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details) +* +* Copyright (c) 2014 Ramon Santamaria (@raysan5) +* +********************************************************************************************/ + +#include "raylib.h" + +// NOTE: Storage positions must start with 0, directly related to file memory layout +typedef enum { STORAGE_SCORE = 0, STORAGE_HISCORE } StorageData; + +int main() +{ + // Initialization + //-------------------------------------------------------------------------------------- + int screenWidth = 800; + int screenHeight = 450; + + InitWindow(screenWidth, screenHeight, "raylib [core] example - storage save/load values"); + + int score = 0; + int hiscore = 0; + + int framesCounter = 0; + + SetTargetFPS(60); + //-------------------------------------------------------------------------------------- + + // Main game loop + while (!WindowShouldClose()) // Detect window close button or ESC key + { + // Update + //---------------------------------------------------------------------------------- + if (IsKeyPressed(KEY_R)) + { + score = GetRandomValue(1000, 2000); + hiscore = GetRandomValue(2000, 4000); + } + + if (IsKeyPressed(KEY_ENTER)) + { + StorageSaveValue(STORAGE_SCORE, score); + StorageSaveValue(STORAGE_HISCORE, hiscore); + } + else if (IsKeyPressed(KEY_SPACE)) + { + // NOTE: If requested position could not be found, value 0 is returned + score = StorageLoadValue(STORAGE_SCORE); + hiscore = StorageLoadValue(STORAGE_HISCORE); + } + + framesCounter++; + //---------------------------------------------------------------------------------- + + // Draw + //---------------------------------------------------------------------------------- + BeginDrawing(); + + ClearBackground(RAYWHITE); + + DrawText(FormatText("SCORE: %i", score), 280, 130, 40, MAROON); + DrawText(FormatText("HI-SCORE: %i", hiscore), 210, 200, 50, BLACK); + + DrawText(FormatText("frames: %i", framesCounter), 10, 10, 20, LIME); + + DrawText("Press R to generate random numbers", 220, 40, 20, LIGHTGRAY); + DrawText("Press ENTER to SAVE values", 250, 310, 20, LIGHTGRAY); + DrawText("Press SPACE to LOAD values", 252, 350, 20, LIGHTGRAY); + + EndDrawing(); + //---------------------------------------------------------------------------------- + } + + // De-Initialization + //-------------------------------------------------------------------------------------- + CloseWindow(); // Close window and OpenGL context + //-------------------------------------------------------------------------------------- + + return 0; +} \ No newline at end of file diff --git a/examples/core_storage_values.png b/examples/core_storage_values.png new file mode 100644 index 00000000..6cfd552d Binary files /dev/null and b/examples/core_storage_values.png differ diff --git a/src/core.c b/src/core.c index 14510a1b..06260281 100644 --- a/src/core.c +++ b/src/core.c @@ -708,6 +708,67 @@ void ClearDroppedFiles(void) } #endif +// Storage save integer value (to defined position) +// NOTE: Storage positions is directly related to file memory layout (4 bytes each integer) +void StorageSaveValue(int position, int value) +{ + FILE *storageFile = NULL; + + // Try open existing file to append data + storageFile = fopen("storage.data", "rb+"); + + // If file doesn't exist, create a new storage data file + if (!storageFile) storageFile = fopen("storage.data", "wb"); + + if (!storageFile) TraceLog(WARNING, "Storage data file could not be created"); + else + { + // Get file size + fseek(storageFile, 0, SEEK_END); + int fileSize = ftell(storageFile); // Size in bytes + fseek(storageFile, 0, SEEK_SET); + + if (fileSize < (position*4)) TraceLog(WARNING, "Storage position could not be found"); + else + { + fseek(storageFile, (position*4), SEEK_SET); + fwrite(&value, 1, 4, storageFile); + } + + fclose(storageFile); + } +} + +// Storage load integer value (from defined position) +// NOTE: If requested position could not be found, value 0 is returned +int StorageLoadValue(int position) +{ + int value = 0; + + // Try open existing file to append data + FILE *storageFile = fopen("storage.data", "rb"); + + if (!storageFile) TraceLog(WARNING, "Storage data file could not be found"); + else + { + // Get file size + fseek(storageFile, 0, SEEK_END); + int fileSize = ftell(storageFile); // Size in bytes + rewind(storageFile); + + if (fileSize < (position*4)) TraceLog(WARNING, "Storage position could not be found"); + else + { + fseek(storageFile, (position*4), SEEK_SET); + fread(&value, 1, 4, storageFile); + } + + fclose(storageFile); + } + + return value; +} + // TODO: Gives the ray trace from mouse position Ray GetMouseRay(Vector2 mousePosition, Camera camera) { diff --git a/src/raylib.h b/src/raylib.h index 99a6979c..f1203537 100644 --- a/src/raylib.h +++ b/src/raylib.h @@ -540,6 +540,9 @@ bool IsFileDropped(void); // Check if a file h char **GetDroppedFiles(int *count); // Retrieve dropped files into window void ClearDroppedFiles(void); // Clear dropped files paths buffer +void StorageSaveValue(int position, int value); // Storage save integer value (to defined position) +int StorageLoadValue(int position); // Storage load integer value (from defined position) + //------------------------------------------------------------------------------------ // Input Handling Functions (Module: core) //------------------------------------------------------------------------------------