1 files changed, 510 insertions, 0 deletions

diff --git a/raylib/src/utils.c b/raylib/src/utils.c
new file mode 100644
index 0000000..c5d9748
--- /dev/null
+++ b/raylib/src/utils.c
@@ -0,0 +1,510 @@
+/**********************************************************************************************
+*
+*   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) 2014-2024 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 <errno.h>                  // Required for: Android error types
+    #include <android/log.h>            // Required for: Android log system: __android_log_vprint()
+    #include <android/asset_manager.h>  // Required for: Android assets manager: AAsset, AAssetManager_open()...
+#endif
+
+#include <stdlib.h>                     // Required for: exit()
+#include <stdio.h>                      // Required for: FILE, fopen(), fseek(), ftell(), fread(), fwrite(), fprintf(), vprintf(), fclose()
+#include <stdarg.h>                     // Required for: va_list, va_start(), va_end()
+#include <string.h>                     // Required for: strcpy(), strcat()
+
+//----------------------------------------------------------------------------------
+// Defines and Macros
+//----------------------------------------------------------------------------------
+#ifndef MAX_TRACELOG_MSG_LENGTH
+    #define MAX_TRACELOG_MSG_LENGTH     256         // Max length of one trace-log message
+#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 function pointer
+static SaveFileDataCallback saveFileData = NULL;    // SaveFileText callback function pointer
+static LoadFileTextCallback loadFileText = NULL;    // LoadFileText callback function pointer
+static SaveFileTextCallback saveFileText = NULL;    // SaveFileText callback function 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;
+    }
+
+    unsigned int textSize = (unsigned int)strlen(text);
+    memcpy(buffer + strlen(buffer), text, (textSize < (MAX_TRACELOG_MSG_LENGTH - 12))? textSize : (MAX_TRACELOG_MSG_LENGTH - 12));
+    strcat(buffer, "\n");
+    vprintf(buffer, args);
+    fflush(stdout);
+#endif
+
+    va_end(args);
+
+    if (logType == LOG_FATAL) exit(EXIT_FAILURE);  // If fatal logging, exit program
+
+#endif  // SUPPORT_TRACELOG
+}
+
+// Internal memory allocator
+// NOTE: Initializes to zero by default
+void *MemAlloc(unsigned int size)
+{
+    void *ptr = RL_CALLOC(size, 1);
+    return ptr;
+}
+
+// Internal memory reallocator
+void *MemRealloc(void *ptr, unsigned 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, int *dataSize)
+{
+    unsigned char *data = NULL;
+    *dataSize = 0;
+
+    if (fileName != NULL)
+    {
+        if (loadFileData)
+        {
+            data = loadFileData(fileName, dataSize);
+            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);     // WARNING: ftell() returns 'long int', maximum size returned is INT_MAX (2147483647 bytes)
+            fseek(file, 0, SEEK_SET);
+
+            if (size > 0)
+            {
+                data = (unsigned char *)RL_MALLOC(size*sizeof(unsigned char));
+
+                if (data != NULL)
+                {
+                    // NOTE: fread() returns number of read elements instead of bytes, so we read [1 byte, size elements]
+                    size_t count = fread(data, sizeof(unsigned char), size, file);
+
+                    // WARNING: fread() returns a size_t value, usually 'unsigned int' (32bit compilation) and 'unsigned long long' (64bit compilation)
+                    // dataSize is unified along raylib as a 'int' type, so, for file-sizes > INT_MAX (2147483647 bytes) we have a limitation
+                    if (count > 2147483647)
+                    {
+                        TRACELOG(LOG_WARNING, "FILEIO: [%s] File is bigger than 2147483647 bytes, avoid using LoadFileData()", fileName);
+
+                        RL_FREE(data);
+                        data = NULL;
+                    }
+                    else
+                    {
+                        *dataSize = (int)count;
+
+                        if ((*dataSize) != size) TRACELOG(LOG_WARNING, "FILEIO: [%s] File partially loaded (%i bytes out of %i)", fileName, dataSize, count);
+                        else TRACELOG(LOG_INFO, "FILEIO: [%s] File loaded successfully", fileName);
+                    }
+                }
+                else TRACELOG(LOG_WARNING, "FILEIO: [%s] Failed to allocated memory for file reading", 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, int dataSize)
+{
+    bool success = false;
+
+    if (fileName != NULL)
+    {
+        if (saveFileData)
+        {
+            return saveFileData(fileName, data, dataSize);
+        }
+#if defined(SUPPORT_STANDARD_FILEIO)
+        FILE *file = fopen(fileName, "wb");
+
+        if (file != NULL)
+        {
+            // WARNING: fwrite() returns a size_t value, usually 'unsigned int' (32bit compilation) and 'unsigned long long' (64bit compilation)
+            // and expects a size_t input value but as dataSize is limited to INT_MAX (2147483647 bytes), there shouldn't be a problem
+            int count = (int)fwrite(data, sizeof(unsigned char), dataSize, file);
+
+            if (count == 0) TRACELOG(LOG_WARNING, "FILEIO: [%s] Failed to write file", fileName);
+            else if (count != dataSize) 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;
+}
+
+// Export data to code (.h), returns true on success
+bool ExportDataAsCode(const unsigned char *data, int dataSize, const char *fileName)
+{
+    bool success = false;
+
+#ifndef TEXT_BYTES_PER_LINE
+    #define TEXT_BYTES_PER_LINE     20
+#endif
+
+    // NOTE: Text data buffer size is estimated considering raw data size in bytes
+    // and requiring 6 char bytes for every byte: "0x00, "
+    char *txtData = (char *)RL_CALLOC(dataSize*6 + 2000, sizeof(char));
+
+    int byteCount = 0;
+    byteCount += sprintf(txtData + byteCount, "////////////////////////////////////////////////////////////////////////////////////////\n");
+    byteCount += sprintf(txtData + byteCount, "//                                                                                    //\n");
+    byteCount += sprintf(txtData + byteCount, "// DataAsCode exporter v1.0 - Raw data exported as an array of bytes                  //\n");
+    byteCount += sprintf(txtData + byteCount, "//                                                                                    //\n");
+    byteCount += sprintf(txtData + byteCount, "// more info and bugs-report:  github.com/raysan5/raylib                              //\n");
+    byteCount += sprintf(txtData + byteCount, "// feedback and support:       ray[at]raylib.com                                      //\n");
+    byteCount += sprintf(txtData + byteCount, "//                                                                                    //\n");
+    byteCount += sprintf(txtData + byteCount, "// Copyright (c) 2022-2024 Ramon Santamaria (@raysan5)                                //\n");
+    byteCount += sprintf(txtData + byteCount, "//                                                                                    //\n");
+    byteCount += sprintf(txtData + byteCount, "////////////////////////////////////////////////////////////////////////////////////////\n\n");
+
+    // Get file name from path
+    char varFileName[256] = { 0 };
+    strcpy(varFileName, GetFileNameWithoutExt(fileName));
+    for (int i = 0; varFileName[i] != '\0'; i++)
+    {
+        // Convert variable name to uppercase
+        if ((varFileName[i] >= 'a') && (varFileName[i] <= 'z')) { varFileName[i] = varFileName[i] - 32; }
+        // Replace non valid character for C identifier with '_'
+        else if (varFileName[i] == '.' || varFileName[i] == '-' || varFileName[i] == '?' || varFileName[i] == '!' || varFileName[i] == '+') { varFileName[i] = '_'; }
+    }
+
+    byteCount += sprintf(txtData + byteCount, "#define %s_DATA_SIZE     %i\n\n", varFileName, dataSize);
+
+    byteCount += sprintf(txtData + byteCount, "static unsigned char %s_DATA[%s_DATA_SIZE] = { ", varFileName, varFileName);
+    for (int i = 0; i < (dataSize - 1); i++) byteCount += sprintf(txtData + byteCount, ((i%TEXT_BYTES_PER_LINE == 0)? "0x%x,\n" : "0x%x, "), data[i]);
+    byteCount += sprintf(txtData + byteCount, "0x%x };\n", data[dataSize - 1]);
+
+    // NOTE: Text data size exported is determined by '\0' (NULL) character
+    success = SaveFileText(fileName, txtData);
+
+    RL_FREE(txtData);
+
+    if (success != 0) TRACELOG(LOG_INFO, "FILEIO: [%s] Data as code exported successfully", fileName);
+    else TRACELOG(LOG_WARNING, "FILEIO: [%s] Failed to export data as code", fileName);
+
+    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));
+
+                if (text != NULL)
+                {
+                    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 allocated memory for file reading", 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(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')
+    {
+        // 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)
+        {
+            // Get 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 *data, int dataSize)
+{
+    return AAsset_read((AAsset *)cookie, data, dataSize);
+}
+
+static int android_write(void *cookie, const char *data, int dataSize)
+{
+    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