/********************************************************************************************** * * raylib.utils - Some common utility functions * * CONFIGURATION: * * #define SUPPORT_TRACELOG * Show TraceLog() output messages * NOTE: By default LOG_DEBUG traces not shown * * * LICENSE: zlib/libpng * * Copyright (c) 2014-2021 Ramon Santamaria (@raysan5) * * This software is provided "as-is", without any express or implied warranty. In no event * will the authors be held liable for any damages arising from the use of this software. * * Permission is granted to anyone to use this software for any purpose, including commercial * applications, and to alter it and redistribute it freely, subject to the following restrictions: * * 1. The origin of this software must not be misrepresented; you must not claim that you * wrote the original software. If you use this software in a product, an acknowledgment * in the product documentation would be appreciated but is not required. * * 2. Altered source versions must be plainly marked as such, and must not be misrepresented * as being the original software. * * 3. This notice may not be removed or altered from any source distribution. * **********************************************************************************************/ #include "raylib.h" // WARNING: Required for: LogType enum // Check if config flags have been externally provided on compilation line #if !defined(EXTERNAL_CONFIG_FLAGS) #include "config.h" // Defines module configuration flags #endif #include "utils.h" #if defined(PLATFORM_ANDROID) #include // Required for: Android error types #include // Required for: Android log system: __android_log_vprint() #include // Required for: Android assets manager: AAsset, AAssetManager_open(), ... #endif #include // Required for: exit() #include // Required for: FILE, fopen(), fseek(), ftell(), fread(), fwrite(), fprintf(), vprintf(), fclose() #include // Required for: va_list, va_start(), va_end() #include // Required for: strcpy(), strcat() //---------------------------------------------------------------------------------- // Defines and Macros //---------------------------------------------------------------------------------- #ifndef MAX_TRACELOG_MSG_LENGTH #define MAX_TRACELOG_MSG_LENGTH 128 // Max length of one trace-log message #endif #ifndef MAX_UWP_MESSAGES #define MAX_UWP_MESSAGES 512 // Max UWP messages to process #endif //---------------------------------------------------------------------------------- // Global Variables Definition //---------------------------------------------------------------------------------- static int logTypeLevel = LOG_INFO; // Minimum log type level static TraceLogCallback traceLog = NULL; // TraceLog callback function pointer static LoadFileDataCallback loadFileData = NULL; // LoadFileData callback funtion pointer static SaveFileDataCallback saveFileData = NULL; // SaveFileText callback funtion pointer static LoadFileTextCallback loadFileText = NULL; // LoadFileText callback funtion pointer static SaveFileTextCallback saveFileText = NULL; // SaveFileText callback funtion pointer //---------------------------------------------------------------------------------- // Functions to set internal callbacks //---------------------------------------------------------------------------------- void SetTraceLogCallback(TraceLogCallback callback) { traceLog = callback; } // Set custom trace log void SetLoadFileDataCallback(LoadFileDataCallback callback) { loadFileData = callback; } // Set custom file data loader void SetSaveFileDataCallback(SaveFileDataCallback callback) { saveFileData = callback; } // Set custom file data saver void SetLoadFileTextCallback(LoadFileTextCallback callback) { loadFileText = callback; } // Set custom file text loader void SetSaveFileTextCallback(SaveFileTextCallback callback) { saveFileText = callback; } // Set custom file text saver #if defined(PLATFORM_ANDROID) static AAssetManager *assetManager = NULL; // Android assets manager pointer static const char *internalDataPath = NULL; // Android internal data path #endif //---------------------------------------------------------------------------------- // Module specific Functions Declaration //---------------------------------------------------------------------------------- #if defined(PLATFORM_ANDROID) FILE *funopen(const void *cookie, int (*readfn)(void *, char *, int), int (*writefn)(void *, const char *, int), fpos_t (*seekfn)(void *, fpos_t, int), int (*closefn)(void *)); static int android_read(void *cookie, char *buf, int size); static int android_write(void *cookie, const char *buf, int size); static fpos_t android_seek(void *cookie, fpos_t offset, int whence); static int android_close(void *cookie); #endif //---------------------------------------------------------------------------------- // Module Functions Definition - Utilities //---------------------------------------------------------------------------------- // Set the current threshold (minimum) log level void SetTraceLogLevel(int logType) { logTypeLevel = logType; } // Show trace log messages (LOG_INFO, LOG_WARNING, LOG_ERROR, LOG_DEBUG) void TraceLog(int logType, const char *text, ...) { #if defined(SUPPORT_TRACELOG) // Message has level below current threshold, don't emit if (logType < logTypeLevel) return; va_list args; va_start(args, text); if (traceLog) { traceLog(logType, text, args); va_end(args); return; } #if defined(PLATFORM_ANDROID) switch(logType) { case LOG_TRACE: __android_log_vprint(ANDROID_LOG_VERBOSE, "raylib", text, args); break; case LOG_DEBUG: __android_log_vprint(ANDROID_LOG_DEBUG, "raylib", text, args); break; case LOG_INFO: __android_log_vprint(ANDROID_LOG_INFO, "raylib", text, args); break; case LOG_WARNING: __android_log_vprint(ANDROID_LOG_WARN, "raylib", text, args); break; case LOG_ERROR: __android_log_vprint(ANDROID_LOG_ERROR, "raylib", text, args); break; case LOG_FATAL: __android_log_vprint(ANDROID_LOG_FATAL, "raylib", text, args); break; default: break; } #else char buffer[MAX_TRACELOG_MSG_LENGTH] = { 0 }; switch (logType) { case LOG_TRACE: strcpy(buffer, "TRACE: "); break; case LOG_DEBUG: strcpy(buffer, "DEBUG: "); break; case LOG_INFO: strcpy(buffer, "INFO: "); break; case LOG_WARNING: strcpy(buffer, "WARNING: "); break; case LOG_ERROR: strcpy(buffer, "ERROR: "); break; case LOG_FATAL: strcpy(buffer, "FATAL: "); break; default: break; } strcat(buffer, text); strcat(buffer, "\n"); vprintf(buffer, args); #endif va_end(args); if (logType == LOG_ERROR) exit(1); // If error, exit program #endif // SUPPORT_TRACELOG } // Internal memory allocator // NOTE: Initializes to zero by default void *MemAlloc(int size) { void *ptr = RL_CALLOC(size, 1); return ptr; } // Internal memory reallocator void *MemRealloc(void *ptr, int size) { void *ret = RL_REALLOC(ptr, size); return ret; } // Internal memory free void MemFree(void *ptr) { RL_FREE(ptr); } // Load data from file into a buffer unsigned char *LoadFileData(const char *fileName, unsigned int *bytesRead) { unsigned char *data = NULL; *bytesRead = 0; if (fileName != NULL) { if (loadFileData) { data = loadFileData(fileName, bytesRead); return data; } #if defined(SUPPORT_STANDARD_FILEIO) FILE *file = fopen(fileName, "rb"); if (file != NULL) { // WARNING: On binary streams SEEK_END could not be found, // using fseek() and ftell() could not work in some (rare) cases fseek(file, 0, SEEK_END); int size = ftell(file); fseek(file, 0, SEEK_SET); if (size > 0) { data = (unsigned char *)RL_MALLOC(size*sizeof(unsigned char)); // NOTE: fread() returns number of read elements instead of bytes, so we read [1 byte, size elements] unsigned int count = (unsigned int)fread(data, sizeof(unsigned char), size, file); *bytesRead = count; if (count != size) TRACELOG(LOG_WARNING, "FILEIO: [%s] File partially loaded", fileName); else TRACELOG(LOG_INFO, "FILEIO: [%s] File loaded successfully", fileName); } else TRACELOG(LOG_WARNING, "FILEIO: [%s] Failed to read file", fileName); fclose(file); } else TRACELOG(LOG_WARNING, "FILEIO: [%s] Failed to open file", fileName); #else TRACELOG(LOG_WARNING, "FILEIO: Standard file io not supported, use custom file callback"); #endif } else TRACELOG(LOG_WARNING, "FILEIO: File name provided is not valid"); return data; } // Unload file data allocated by LoadFileData() void UnloadFileData(unsigned char *data) { RL_FREE(data); } // Save data to file from buffer bool SaveFileData(const char *fileName, void *data, unsigned int bytesToWrite) { bool success = false; if (fileName != NULL) { if (saveFileData) { return saveFileData(fileName, data, bytesToWrite); } #if defined(SUPPORT_STANDARD_FILEIO) FILE *file = fopen(fileName, "wb"); if (file != NULL) { unsigned int count = (unsigned int)fwrite(data, sizeof(unsigned char), bytesToWrite, file); if (count == 0) TRACELOG(LOG_WARNING, "FILEIO: [%s] Failed to write file", fileName); else if (count != bytesToWrite) TRACELOG(LOG_WARNING, "FILEIO: [%s] File partially written", fileName); else TRACELOG(LOG_INFO, "FILEIO: [%s] File saved successfully", fileName); int result = fclose(file); if (result == 0) success = true; } else TRACELOG(LOG_WARNING, "FILEIO: [%s] Failed to open file", fileName); #else TRACELOG(LOG_WARNING, "FILEIO: Standard file io not supported, use custom file callback"); #endif } else TRACELOG(LOG_WARNING, "FILEIO: File name provided is not valid"); return success; } // Load text data from file, returns a '\0' terminated string // NOTE: text chars array should be freed manually char *LoadFileText(const char *fileName) { char *text = NULL; if (fileName != NULL) { if (loadFileText) { text = loadFileText(fileName); return text; } #if defined(SUPPORT_STANDARD_FILEIO) FILE *file = fopen(fileName, "rt"); if (file != NULL) { // WARNING: When reading a file as 'text' file, // text mode causes carriage return-linefeed translation... // ...but using fseek() should return correct byte-offset fseek(file, 0, SEEK_END); unsigned int size = (unsigned int)ftell(file); fseek(file, 0, SEEK_SET); if (size > 0) { text = (char *)RL_MALLOC((size + 1)*sizeof(char)); unsigned int count = (unsigned int)fread(text, sizeof(char), size, file); // WARNING: \r\n is converted to \n on reading, so, // read bytes count gets reduced by the number of lines if (count < size) text = RL_REALLOC(text, count + 1); // Zero-terminate the string text[count] = '\0'; TRACELOG(LOG_INFO, "FILEIO: [%s] Text file loaded successfully", fileName); } else TRACELOG(LOG_WARNING, "FILEIO: [%s] Failed to read text file", fileName); fclose(file); } else TRACELOG(LOG_WARNING, "FILEIO: [%s] Failed to open text file", fileName); #else TRACELOG(LOG_WARNING, "FILEIO: Standard file io not supported, use custom file callback"); #endif } else TRACELOG(LOG_WARNING, "FILEIO: File name provided is not valid"); return text; } // Unload file text data allocated by LoadFileText() void UnloadFileText(unsigned char *text) { RL_FREE(text); } // Save text data to file (write), string must be '\0' terminated bool SaveFileText(const char *fileName, char *text) { bool success = false; if (fileName != NULL) { if (saveFileText) { return saveFileText(fileName, text); } #if defined(SUPPORT_STANDARD_FILEIO) FILE *file = fopen(fileName, "wt"); if (file != NULL) { int count = fprintf(file, "%s", text); if (count < 0) TRACELOG(LOG_WARNING, "FILEIO: [%s] Failed to write text file", fileName); else TRACELOG(LOG_INFO, "FILEIO: [%s] Text file saved successfully", fileName); int result = fclose(file); if (result == 0) success = true; } else TRACELOG(LOG_WARNING, "FILEIO: [%s] Failed to open text file", fileName); #else TRACELOG(LOG_WARNING, "FILEIO: Standard file io not supported, use custom file callback"); #endif } else TRACELOG(LOG_WARNING, "FILEIO: File name provided is not valid"); return success; } #if defined(PLATFORM_ANDROID) // Initialize asset manager from android app void InitAssetManager(AAssetManager *manager, const char *dataPath) { assetManager = manager; internalDataPath = dataPath; } // Replacement for fopen() // Ref: https://developer.android.com/ndk/reference/group/asset FILE *android_fopen(const char *fileName, const char *mode) { if (mode[0] == 'w') { // TODO: fopen() is mapped to android_fopen() that only grants read access // to assets directory through AAssetManager but we want to also be able to // write data when required using the standard stdio FILE access functions // Ref: https://stackoverflow.com/questions/11294487/android-writing-saving-files-from-native-code-only #undef fopen return fopen(TextFormat("%s/%s", internalDataPath, fileName), mode); #define fopen(name, mode) android_fopen(name, mode) } else { // NOTE: AAsset provides access to read-only asset AAsset *asset = AAssetManager_open(assetManager, fileName, AASSET_MODE_UNKNOWN); if (asset != NULL) { // Return pointer to file in the assets return funopen(asset, android_read, android_write, android_seek, android_close); } else { #undef fopen // Just do a regular open if file is not found in the assets return fopen(TextFormat("%s/%s", internalDataPath, fileName), mode); #define fopen(name, mode) android_fopen(name, mode) } } } #endif // PLATFORM_ANDROID //---------------------------------------------------------------------------------- // Module specific Functions Definition //---------------------------------------------------------------------------------- #if defined(PLATFORM_ANDROID) static int android_read(void *cookie, char *buf, int size) { return AAsset_read((AAsset *)cookie, buf, size); } static int android_write(void *cookie, const char *buf, int size) { TRACELOG(LOG_WARNING, "ANDROID: Failed to provide write access to APK"); return EACCES; } static fpos_t android_seek(void *cookie, fpos_t offset, int whence) { return AAsset_seek((AAsset *)cookie, offset, whence); } static int android_close(void *cookie) { AAsset_close((AAsset *)cookie); return 0; } #endif // PLATFORM_ANDROID