/**********************************************************************************************
*
* rres v1.0 - A simple and easy-to-use file-format to package resources
*
* CONFIGURATION:
*
* #define RRES_IMPLEMENTATION
* Generates the implementation of the library into the included file.
* If not defined, the library is in header only mode and can be included in other headers
* or source files without problems. But only ONE file should hold the implementation.
*
* FEATURES:
*
* - Multi-resource files: Some files could end-up generating multiple connected resources in
* the rres output file (i.e TTF files could generate RRES_DATA_FONT_GLYPHS and RRES_DATA_IMAGE).
* - File packaging as raw resource data: Avoid data processing and just package the file bytes.
* - Per-file data compression/encryption: Configure compression/encription for every input file.
* - Externally linked files: Package only the file path, to be loaded from external file when the
* specific id is requested. WARNING: Be careful with path, it should be relative to application dir.
* - Central Directory resource (optional): Create a central directory with the input filename relation
* to the resource(s) id. This is the default option but it can be avoided; in that case, a header
* file (.h) is generated with the file ids definitions.
*
* FILE STRUCTURE:
*
* rres files consist of a file header followed by a number of resource chunks.
*
* Optionally it can contain a Central Directory resource chunk (usually at the end) with the info
* of all the files processed into the rres file.
*
* NOTE: Chunks count could not match files count, some processed files (i.e Font, Mesh)
* could generate multiple chunks with the same id related by the rresResourceChunkInfo.nextOffset
* Those chunks are loaded together when resource is loaded
*
* rresFileHeader (16 bytes)
* Signature Id (4 bytes) // File signature id: 'rres'
* Version (2 bytes) // Format version
* Resource Count (2 bytes) // Number of resource chunks contained
* CD Offset (4 bytes) // Central Directory offset (if available)
* Reserved (4 bytes) // <reserved>
*
* rresResourceChunk[]
* {
* rresResourceChunkInfo (32 bytes)
* Type (4 bytes) // Resource type (FourCC)
* Id (4 bytes) // Resource identifier (CRC32 filename hash or custom)
* Compressor (1 byte) // Data compression algorithm
* Cipher (1 byte) // Data encryption algorithm
* Flags (2 bytes) // Data flags (if required)
* Data Packed Size (4 bytes) // Data packed size (compressed/encrypted + custom data appended)
* Data Base Size (4 bytes) // Data base size (uncompressed/unencrypted)
* Next Offset (4 bytes) // Next resource chunk offset (if required)
* Reserved (4 bytes) // <reserved>
* CRC32 (4 bytes) // Resource Data Chunk CRC32
*
* rresResourceChunkData (n bytes) // Packed data
* Property Count (4 bytes) // Number of properties contained
* Properties[] (4*i bytes) // Resource data required properties, depend on Type
* Data (m bytes) // Resource data
* }
*
* rresResourceChunk: RRES_DATA_DIRECTORY // Central directory (special resource chunk)
* {
* rresResourceChunkInfo (32 bytes)
*
* rresCentralDir (n bytes) // rresResourceChunkData
* Entries Count (4 bytes) // Central directory entries count (files)
* rresDirEntry[]
* {
* Id (4 bytes) // Resource id
* Offset (4 bytes) // Resource global offset in file
* reserved (4 bytes) // <reserved>
* FileName Size (4 bytes) // Resource fileName size (NULL terminator and 4-bytes align padding considered)
* FileName (m bytes) // Resource original fileName (NULL terminated and padded to 4-byte alignment)
* }
* }
*
* DESIGN DECISIONS / LIMITATIONS:
*
* - rres file maximum chunks: 65535 (16bit chunk count in rresFileHeader)
* - rres file maximum size: 4GB (chunk offset and Central Directory Offset is 32bit, so it can not address more than 4GB
* - Chunk search by ID is done one by one, starting at first chunk and accessed with fread() function
* - Endianness: rres does not care about endianness, data is stored as desired by the host platform (most probably Little Endian)
* Endianness won't affect chunk data but it will affect rresFileHeader and rresResourceChunkInfo
* - CRC32 hash is used to to generate the rres file identifier from filename
* There is a "small" probability of random collision (1 in 2^32 approx.) but considering
* the chance of collision is related to the number of data inputs, not the size of the inputs, we assume that risk
* Also note that CRC32 is not used as a security/cryptographic hash, just an identifier for the input file
* - CRC32 hash is also used to detect chunk data corruption. CRC32 is smaller and computationally much less complex than MD5 or SHA1.
* Using a hash function like MD5 is probably overkill for random error detection
* - Central Directory rresDirEntry.fileName is NULL terminated and padded to 4-byte, rresDirEntry.fileNameSize considers the padding
* - Compression and Encryption. rres supports chunks data compression and encryption, it provides two fields in the rresResourceChunkInfo to
* note it, but in those cases is up to the user to implement the desired compressor/uncompressor and encryption/decryption mechanisms
* In case of data encryption, it's recommended that any additional resource data (i.e. MAC) to be appended to data chunk and properly
* noted in the packed data size field of rresResourceChunkInfo. Data compression should be applied before encryption.
*
* DEPENDENCIES:
*
* rres library dependencies has been keep to the minimum. It depends only some libc functionality:
*
* - stdlib.h: Required for memory allocation: malloc(), calloc(), free()
* NOTE: Allocators can be redefined with macros RRES_MALLOC, RRES_CALLOC, RRES_FREE
* - stdio.h: Required for file access functionality: FILE, fopen(), fseek(), fread(), fclose()
* - string.h: Required for memory data management: memcpy(), memcmp()
*
* VERSION HISTORY:
*
* - 1.0 (12-May-2022): Implementation review for better alignment with rres specs
* - 0.9 (28-Apr-2022): Initial implementation of rres specs
*
*
* LICENSE: MIT
*
* Copyright (c) 2016-2022 Ramon Santamaria (@raysan5)
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
**********************************************************************************************/
#ifndef RRES_H
#define RRES_H
// Function specifiers in case library is build/used as a shared library (Windows)
// NOTE: Microsoft specifiers to tell compiler that symbols are imported/exported from a .dll
#if defined(_WIN32)
#if defined(BUILD_LIBTYPE_SHARED)
#define RRESAPI __declspec(dllexport) // We are building the library as a Win32 shared library (.dll)
#elif defined(USE_LIBTYPE_SHARED)
#define RRESAPI __declspec(dllimport) // We are using the library as a Win32 shared library (.dll)
#endif
#endif
// Function specifiers definition
#ifndef RRESAPI
#define RRESAPI // Functions defined as 'extern' by default (implicit specifiers)
#endif
//----------------------------------------------------------------------------------
// Defines and Macros
//----------------------------------------------------------------------------------
// Allow custom memory allocators
#ifndef RRES_MALLOC
#define RRES_MALLOC(sz) malloc(sz)
#endif
#ifndef RRES_CALLOC
#define RRES_CALLOC(ptr,sz) calloc(ptr,sz)
#endif
#ifndef RRES_REALLOC
#define RRES_REALLOC(ptr,sz) realloc(ptr,sz)
#endif
#ifndef RRES_FREE
#define RRES_FREE(ptr) free(ptr)
#endif
// Simple log system to avoid printf() calls if required
// NOTE: Avoiding those calls, also avoids const strings memory usage
#define RRES_SUPPORT_LOG_INFO
#if defined(RRES_SUPPORT_LOG_INFO)
#define RRES_LOG(...) printf(__VA_ARGS__)
#else
#define RRES_LOG(...)
#endif
// On Windows, MAX_PATH is limited to 256 by default,
// on Linux, it could go up to 4096
#define RRES_MAX_FILENAME_SIZE 1024
//----------------------------------------------------------------------------------
// Types and Structures Definition
//----------------------------------------------------------------------------------
// rres file header (16 bytes)
typedef struct rresFileHeader {
unsigned char id[4]; // File identifier: rres
unsigned short version; // File version: 100 for version 1.0
unsigned short chunkCount; // Number of resource chunks in the file (MAX: 65535)
unsigned int cdOffset; // Central Directory offset in file (0 if not available)
unsigned int reserved; // <reserved>
} rresFileHeader;
// rres resource chunk info header (32 bytes)
typedef struct rresResourceChunkInfo {
unsigned char type[4]; // Resource chunk type (FourCC)
unsigned int id; // Resource chunk identifier (generated from filename CRC32 hash)
unsigned char compType; // Data compression algorithm
unsigned char cipherType; // Data encription algorithm
unsigned short flags; // Data flags (if required)
unsigned int packedSize; // Data chunk size (compressed/encrypted + custom data appended)
unsigned int baseSize; // Data base size (uncompressed/unencrypted)
unsigned int nextOffset; // Next resource chunk global offset (if resource has multiple chunks)
unsigned int reserved; // <reserved>
unsigned int crc32; // Data chunk CRC32 (propCount + props[] + data)
} rresResourceChunkInfo;
// rres resource chunk data
typedef struct rresResourceChunkData {
unsigned int propCount; // Resource chunk properties count
unsigned int *props; // Resource chunk properties
void *raw; // Resource chunk raw data
} rresResourceChunkData;
// rres resource chunk
typedef struct rresResourceChunk {
rresResourceChunkInfo info; // Resource chunk info
rresResourceChunkData data; // Resource chunk packed data, contains propCount, props[] and raw data
} rresResourceChunk;
// rres resource multi
// NOTE: It supports multiple resource chunks
typedef struct rresResourceMulti {
unsigned int count; // Resource chunks count
rresResourceChunk *chunks; // Resource chunks
} rresResourceMulti;
// Useful data types for specific chunk types
//----------------------------------------------------------------------
// CDIR: rres central directory entry
typedef struct rresDirEntry {
unsigned int id; // Resource id
unsigned int offset; // Resource global offset in file
unsigned int reserved; // reserved
unsigned int fileNameSize; // Resource fileName size (NULL terminator and 4-byte alignment padding considered)
char fileName[RRES_MAX_FILENAME_SIZE]; // Resource original fileName (NULL terminated and padded to 4-byte alignment)
} rresDirEntry;
// CDIR: rres central directory
// NOTE: This data conforms the rresResourceChunkData
typedef struct rresCentralDir {
unsigned int count; // Central directory entries count
rresDirEntry *entries; // Central directory entries
} rresCentralDir;
// FNTG: rres font glyphs info (32 bytes)
// NOTE: And array of this type conforms the rresResourceChunkData
typedef struct rresFontGlyphInfo {
int x, y, width, height; // Glyph rectangle in the atlas image
int value; // Glyph codepoint value
int offsetX, offsetY; // Glyph drawing offset (from base line)
int advanceX; // Glyph advance X for next character
} rresFontGlyphInfo;
//----------------------------------------------------------------------------------
// Enums Definition
// The following enums are useful to fill some fields of the rresResourceChunkInfo
// and also some fields of the different data types properties
//----------------------------------------------------------------------------------
// rres resource chunk data type
// NOTE 1: Data type determines the properties and the data included in every chunk
// NOTE 2: This enum defines the basic resource data types,
// some input files could generate multiple resource chunks:
// Fonts processed could generate (2) resource chunks:
// - [FNTG] rres[0]: RRES_DATA_FONT_GLYPHS
// - [IMGE] rres[1]: RRES_DATA_IMAGE
//
// Mesh processed could generate (n) resource chunks:
// - [VRTX] rres[0]: RRES_DATA_VERTEX
// ...
// - [VRTX] rres[n]: RRES_DATA_VERTEX
typedef enum rresResourceDataType {
RRES_DATA_NULL = 0, // FourCC: NULL - Reserved for empty chunks, no props/data
RRES_DATA_RAW = 1, // FourCC: RAWD - Raw file data, 4 properties
// props[0]:size (bytes)
// props[1]:extension01 (big-endian: ".png" = 0x2e706e67)
// props[2]:extension02 (additional part, extensions with +3 letters)
// props[3]:reserved
// data: raw bytes
RRES_DATA_TEXT = 2, // FourCC: TEXT - Text file data, 4 properties
// props[0]:size (bytes)
// props[1]:rresTextEncoding
// props[2]:rresCodeLang
// props[3]:cultureCode
// data: text
RRES_DATA_IMAGE = 3, // FourCC: IMGE - Image file data, 4 properties
// props[0]:width
// props[1]:height
// props[2]:rresPixelFormat
// props[3]:mipmaps
// data: pixels
RRES_DATA_WAVE = 4, // FourCC: WAVE - Audio file data, 4 properties
// props[0]:frameCount
// props[1]:sampleRate
// props[2]:sampleSize
// props[3]:channels
// data: samples
RRES_DATA_VERTEX = 5, // FourCC: VRTX - Vertex file data, 4 properties
// props[0]:vertexCount
// props[1]:rresVertexAttribute
// props[2]:componentCount
// props[3]:rresVertexFormat
// data: vertex
RRES_DATA_FONT_GLYPHS = 6, // FourCC: FNTG - Font glyphs info data, 4 properties
// props[0]:baseSize
// props[1]:glyphCount
// props[2]:glyphPadding
// props[3]:rresFontStyle
// data: rresFontGlyphInfo[0..glyphCount]
RRES_DATA_LINK = 99, // FourCC: LINK - External linked file, 1 property
// props[0]:size (bytes)
// data: filepath (as provided on input)
RRES_DATA_DIRECTORY = 100, // FourCC: CDIR - Central directory for input files
// props[0]:entryCount, 1 property
// data: rresDirEntry[0..entryCount]
// TODO: 2.0: Support resource package types (muti-resource)
// NOTE: They contains multiple rresResourceChunk in rresResourceData.raw
//RRES_DATA_PACK_FONT = 110, // FourCC: PFNT - Resources Pack: Font data, 1 property (2 resource chunks: RRES_DATA_GLYPHS, RRES_DATA_IMAGE)
// props[0]:chunkCount
//RRES_DATA_PACK_MESH = 120, // FourCC: PMSH - Resources Pack: Mesh data, 1 property (n resource chunks: RRES_DATA_VERTEX)
// props[0]:chunkCount
// TODO: Add additional resource data types if required (define props + data)
} rresResourceDataType;
// Compression algorithms
// Value required by rresResourceChunkInfo.compType
// NOTE 1: This enum just list some common data compression algorithms for convenience,
// The rres packer tool and the engine-specific library are responsible to implement the desired ones,
// NOTE 2: rresResourceChunkInfo.compType is a byte-size value, limited to [0..255]
typedef enum rresCompressionType {
RRES_COMP_NONE = 0, // No data compression
RRES_COMP_RLE = 1, // RLE compression
RRES_COMP_DEFLATE = 10, // DEFLATE compression
RRES_COMP_LZ4 = 20, // LZ4 compression
RRES_COMP_LZMA2 = 30, // LZMA2 compression
RRES_COMP_QOI = 40, // QOI compression, useful for RGB(A) image data
// TODO: Add additional compression algorithms if required
} rresCompressionType;
// Encryption algoritms
// Value required by rresResourceChunkInfo.cipherType
// NOTE 1: This enum just lists some common data encryption algorithms for convenience,
// The rres packer tool and the engine-specific library are responsible to implement the desired ones,
// NOTE 2: Some encryption algorithm could require/generate additional data (seed, salt, nonce, MAC...)
// in those cases, that extra data must be appended to the original encrypted message and added to the resource data chunk
// NOTE 3: rresResourceChunkInfo.cipherType is a byte-size value, limited to [0..255]
typedef enum rresEncryptionType {
RRES_CIPHER_NONE = 0, // No data encryption
RRES_CIPHER_XOR = 1, // XOR encryption, generic using 128bit key in blocks
RRES_CIPHER_DES = 10, // DES encryption
RRES_CIPHER_TDES = 11, // Triple DES encryption
RRES_CIPHER_IDEA = 20, // IDEA encryption
RRES_CIPHER_AES = 30, // AES (128bit or 256bit) encryption
RRES_CIPHER_AES_GCM = 31, // AES Galois/Counter Mode (Galois Message Authentification Code - GMAC)
RRES_CIPHER_XTEA = 40, // XTEA encryption
RRES_CIPHER_BLOWFISH = 50, // BLOWFISH encryption
RRES_CIPHER_RSA = 60, // RSA asymmetric encryption
RRES_CIPHER_SALSA20 = 70, // SALSA20 encryption
RRES_CIPHER_CHACHA20 = 71, // CHACHA20 encryption
RRES_CIPHER_XCHACHA20 = 72, // XCHACHA20 encryption
RRES_CIPHER_XCHACHA20_POLY1305 = 73, // XCHACHA20 with POLY1305 for message authentification (MAC)
// TODO: Add additional encryption algorithm if required
} rresEncryptionType;
// TODO: rres error codes (not used at this moment)
// NOTE: Error codes when processing rres files
typedef enum rresErrorType {
RRES_SUCCESS = 0, // rres file loaded/saved successfully
RRES_ERROR_FILE_NOT_FOUND, // rres file can not be opened (spelling issues, file actually does not exist...)
RRES_ERROR_FILE_FORMAT, // rres file format not a supported (wrong header, wrong identifier)
RRES_ERROR_MEMORY_ALLOC, // Memory could not be allocated for operation.
} rresErrorType;
// Enums required by specific resource types for its properties
//----------------------------------------------------------------------------------
// TEXT: Text encoding property values
typedef enum rresTextEncoding {
RRES_TEXT_ENCODING_UNDEFINED = 0, // Not defined, usually UTF-8
RRES_TEXT_ENCODING_UTF8 = 1, // UTF-8 text encoding
RRES_TEXT_ENCODING_UTF8_BOM = 2, // UTF-8 text encoding with Byte-Order-Mark
RRES_TEXT_ENCODING_UTF16_LE = 10, // UTF-16 Little Endian text encoding
RRES_TEXT_ENCODING_UTF16_BE = 11, // UTF-16 Big Endian text encoding
// TODO: Add additional encodings if required
} rresTextEncoding;
// TEXT: Text code language
// NOTE: It could be useful for code script resources
typedef enum rresCodeLang {
RRES_CODE_LANG_UNDEFINED = 0, // Undefined code language, text is plain text
RRES_CODE_LANG_C, // Text contains C code
RRES_CODE_LANG_CPP, // Text contains C++ code
RRES_CODE_LANG_CS, // Text contains C# code
RRES_CODE_LANG_LUA, // Text contains Lua code
RRES_CODE_LANG_JS, // Text contains JavaScript code
RRES_CODE_LANG_PYTHON, // Text contains Python code
RRES_CODE_LANG_RUST, // Text contains Rust code
RRES_CODE_LANG_ZIG, // Text contains Zig code
RRES_CODE_LANG_ODIN, // Text contains Odin code
RRES_CODE_LANG_JAI, // Text contains Jai code
RRES_CODE_LANG_GDSCRIPT, // Text contains GDScript (Godot) code
RRES_CODE_LANG_GLSL, // Text contains GLSL shader code
// TODO: Add additional code languages if required
} rresCodeLang;
// IMGE: Image/Texture pixel formats
typedef enum rresPixelFormat {
RRES_PIXELFORMAT_UNDEFINED = 0,
RRES_PIXELFORMAT_UNCOMP_GRAYSCALE = 1, // 8 bit per pixel (no alpha)
RRES_PIXELFORMAT_UNCOMP_GRAY_ALPHA, // 16 bpp (2 channels)
RRES_PIXELFORMAT_UNCOMP_R5G6B5, // 16 bpp
RRES_PIXELFORMAT_UNCOMP_R8G8B8, // 24 bpp
RRES_PIXELFORMAT_UNCOMP_R5G5B5A1, // 16 bpp (1 bit alpha)
RRES_PIXELFORMAT_UNCOMP_R4G4B4A4, // 16 bpp (4 bit alpha)
RRES_PIXELFORMAT_UNCOMP_R8G8B8A8, // 32 bpp
RRES_PIXELFORMAT_UNCOMP_R32, // 32 bpp (1 channel - float)
RRES_PIXELFORMAT_UNCOMP_R32G32B32, // 32*3 bpp (3 channels - float)
RRES_PIXELFORMAT_UNCOMP_R32G32B32A32, // 32*4 bpp (4 channels - float)
RRES_PIXELFORMAT_COMP_DXT1_RGB, // 4 bpp (no alpha)
RRES_PIXELFORMAT_COMP_DXT1_RGBA, // 4 bpp (1 bit alpha)
RRES_PIXELFORMAT_COMP_DXT3_RGBA, // 8 bpp
RRES_PIXELFORMAT_COMP_DXT5_RGBA, // 8 bpp
RRES_PIXELFORMAT_COMP_ETC1_RGB, // 4 bpp
RRES_PIXELFORMAT_COMP_ETC2_RGB, // 4 bpp
RRES_PIXELFORMAT_COMP_ETC2_EAC_RGBA, // 8 bpp
RRES_PIXELFORMAT_COMP_PVRT_RGB, // 4 bpp
RRES_PIXELFORMAT_COMP_PVRT_RGBA, // 4 bpp
RRES_PIXELFORMAT_COMP_ASTC_4x4_RGBA, // 8 bpp
RRES_PIXELFORMAT_COMP_ASTC_8x8_RGBA // 2 bpp
// TOO: Add additional pixel formats if required
} rresPixelFormat;
// VRTX: Vertex data attribute
// NOTE: The expected number of components for every vertex attributes is provided as a property to data,
// the listed components count are the expected/default ones
typedef enum rresVertexAttribute {
RRES_VERTEX_ATTRIBUTE_POSITION = 0, // Vertex position attribute: [x, y, z]
RRES_VERTEX_ATTRIBUTE_TEXCOORD1 = 10, // Vertex texture coordinates attribute: [u, v]
RRES_VERTEX_ATTRIBUTE_TEXCOORD2 = 11, // Vertex texture coordinates attribute: [u, v]
RRES_VERTEX_ATTRIBUTE_TEXCOORD3 = 12, // Vertex texture coordinates attribute: [u, v]
RRES_VERTEX_ATTRIBUTE_TEXCOORD4 = 13, // Vertex texture coordinates attribute: [u, v]
RRES_VERTEX_ATTRIBUTE_NORMAL = 20, // Vertex normal attribute: [x, y, z]
RRES_VERTEX_ATTRIBUTE_TANGENT = 30, // Vertex tangent attribute: [x, y, z, w]
RRES_VERTEX_ATTRIBUTE_COLOR = 40, // Vertex color attribute: [r, g, b, a]
RRES_VERTEX_ATTRIBUTE_INDEX = 100, // Vertex index attribute: [i]
// TODO: Add additional attributes if required
} rresVertexAttribute;
// VRTX: Vertex data format type
typedef enum rresVertexFormat {
RRES_VERTEX_FORMAT_UBYTE = 0, // 8 bit unsigned integer data
RRES_VERTEX_FORMAT_BYTE, // 8 bit signed integer data
RRES_VERTEX_FORMAT_USHORT, // 16 bit unsigned integer data
RRES_VERTEX_FORMAT_SHORT, // 16 bit signed integer data
RRES_VERTEX_FORMAT_UINT, // 32 bit unsigned integer data
RRES_VERTEX_FORMAT_INT, // 32 bit integer data
RRES_VERTEX_FORMAT_HFLOAT, // 16 bit float data
RRES_VERTEX_FORMAT_FLOAT, // 32 bit float data
// TODO: Add additional required vertex formats (i.e. normalized data)
} rresVertexFormat;
// FNTG: Font style
typedef enum rresFontStyle {
RRES_FONT_STYLE_UNDEFINED = 0, // Undefined font style
RRES_FONT_STYLE_REGULAR, // Regular font style
RRES_FONT_STYLE_BOLD, // Bold font style
RRES_FONT_STYLE_ITALIC, // Italic font style
// TODO: Add additional font styles if required
} rresFontStyle;
//----------------------------------------------------------------------------------
// Global variables
//----------------------------------------------------------------------------------
//...
//----------------------------------------------------------------------------------
// Module Functions Declaration
//----------------------------------------------------------------------------------
#ifdef __cplusplus
extern "C" { // Prevents name mangling of functions
#endif
// Load only one resource chunk (first resource id found)
RRESAPI rresResourceChunk rresLoadResourceChunk(const char *fileName, int rresId); // Load one resource chunk for provided id
RRESAPI void rresUnloadResourceChunk(rresResourceChunk chunk); // Unload resource chunk from memory
// Load multi resource chunks for a specified rresId
RRESAPI rresResourceMulti rresLoadResourceMulti(const char *fileName, int rresId); // Load resource for provided id (multiple resource chunks)
RRESAPI void rresUnloadResourceMulti(rresResourceMulti multi); // Unload resource from memory (multiple resource chunks)
// Load resource(s) chunk info from file
RRESAPI rresResourceChunkInfo rresLoadResourceChunkInfo(const char *fileName, int rresId); // Load resource chunk info for provided id
RRESAPI rresResourceChunkInfo *rresLoadResourceChunkInfoAll(const char *fileName, unsigned int *chunkCount); // Load all resource chunks info
RRESAPI rresCentralDir rresLoadCentralDirectory(const char *fileName); // Load central directory resource chunk from file
RRESAPI void rresUnloadCentralDirectory(rresCentralDir dir); // Unload central directory resource chunk
RRESAPI unsigned int rresGetDataType(const unsigned char *fourCC); // Get rresResourceDataType from FourCC code
RRESAPI int rresGetResourceId(rresCentralDir dir, const char *fileName); // Get resource id for a provided filename
// NOTE: It requires CDIR available in the file (it's optinal by design)
RRESAPI unsigned int rresComputeCRC32(unsigned char *data, int len); // Compute CRC32 for provided data
// Manage password for data encryption/decryption
// NOTE: The cipher password is kept as an internal pointer to provided string, it's up to the user to manage that sensible data properly
// Password should be to allocate and set before loading an encrypted resource and it should be cleaned/wiped after the encrypted resource has been loaded
// TODO: Move this functionality to engine-library, after all rres.h does not manage data decryption
RRESAPI void rresSetCipherPassword(const char *pass); // Set password to be used on data decryption
RRESAPI const char *rresGetCipherPassword(void); // Get password to be used on data decryption
#ifdef __cplusplus
}
#endif
#endif // RRES_H
/***********************************************************************************
*
* RRES IMPLEMENTATION
*
************************************************************************************/
#if defined(RRES_IMPLEMENTATION)
// Boolean type
#if (defined(__STDC__) && __STDC_VERSION__ >= 199901L) || (defined(_MSC_VER) && _MSC_VER >= 1800)
#include <stdbool.h>
#elif !defined(__cplusplus) && !defined(bool)
typedef enum bool { false = 0, true = !false } bool;
#define RL_BOOL_TYPE
#endif
#include <stdlib.h> // Required for: malloc(), free()
#include <stdio.h> // Required for: FILE, fopen(), fseek(), fread(), fclose()
#include <string.h> // Required for: memcpy(), memcmp()
//----------------------------------------------------------------------------------
// Defines and Macros
//----------------------------------------------------------------------------------
//...
//----------------------------------------------------------------------------------
// Types and Structures Definition
//----------------------------------------------------------------------------------
//...
//----------------------------------------------------------------------------------
// Global Variables Definition
//----------------------------------------------------------------------------------
static const char *password = NULL; // Password pointer, managed by user libraries
//----------------------------------------------------------------------------------
// Module Internal Functions Declaration
//----------------------------------------------------------------------------------
// Load resource chunk packed data into our data struct
static rresResourceChunkData rresLoadResourceChunkData(rresResourceChunkInfo info, void *packedData);
//----------------------------------------------------------------------------------
// Module Functions Definition
//----------------------------------------------------------------------------------
// Load one resource chunk for provided id
rresResourceChunk rresLoadResourceChunk(const char *fileName, int rresId)
{
rresResourceChunk chunk = { 0 };
FILE *rresFile = fopen(fileName, "rb");
if (rresFile == NULL) RRES_LOG("RRES: WARNING: [%s] rres file could not be opened\n", fileName);
else
{
RRES_LOG("RRES: INFO: Loading resource from file: %s\n", fileName);
rresFileHeader header = { 0 };
// Read rres file header
fread(&header, sizeof(rresFileHeader), 1, rresFile);
// Verify file signature: "rres" and file version: 100
if (((header.id[0] == 'r') && (header.id[1] == 'r') && (header.id[2] == 'e') && (header.id[3] == 's')) && (header.version == 100))
{
bool found = false;
// Check all available chunks looking for the requested id
for (int i = 0; i < header.chunkCount; i++)
{
rresResourceChunkInfo info = { 0 };
// Read resource info header
fread(&info, sizeof(rresResourceChunkInfo), 1, rresFile);
// Check if resource id is the requested one
if (info.id == rresId)
{
found = true;
RRES_LOG("RRES: INFO: Found requested resource id: 0x%08x\n", info.id);
RRES_LOG("RRES: %c%c%c%c: Id: 0x%08x | Base size: %i | Packed size: %i\n", info.type[0], info.type[1], info.type[2], info.type[3], info.id, info.baseSize, info.packedSize);
// NOTE: We only load first matching id resource chunk found but
// we show a message if additional chunks are detected
if (info.nextOffset != 0) RRES_LOG("RRES: WARNING: Multiple linked resource chunks available for the provided id");
/*
// Variables required to check multiple chunks
int chunkCount = 0;
long currentFileOffset = ftell(rresFile); // Store current file position
rresResourceChunkInfo temp = info; // Temp info header to scan resource chunks
// Count all linked resource chunks checking temp.nextOffset
while (temp.nextOffset != 0)
{
fseek(rresFile, temp.nextOffset, SEEK_SET); // Jump to next linked resource
fread(&temp, sizeof(rresResourceChunkInfo), 1, rresFile); // Read next resource info header
chunkCount++;
}
fseek(rresFile, currentFileOffset, SEEK_SET); // Return to first resource chunk position
*/
// Read and resource chunk from file data
// NOTE: Read data can be compressed/encrypted, it's up to the user library to manage decompression/decryption
void *data = RRES_MALLOC(info.packedSize); // Allocate enough memory to store resource data chunk
fread(data, info.packedSize, 1, rresFile); // Read data: propsCount + props[] + data (+additional_data)
// Get chunk.data properly organized (only if uncompressed/unencrypted)
chunk.data = rresLoadResourceChunkData(info, data);
chunk.info = info;
RRES_FREE(data);
break; // Resource id found and loaded, stop checking the file
}
else
{
// Skip required data size to read next resource info header
fseek(rresFile, info.packedSize, SEEK_CUR);
}
}
if (!found) RRES_LOG("RRES: WARNING: Requested resource not found: 0x%08x\n", rresId);
}
else RRES_LOG("RRES: WARNING: The provided file is not a valid rres file, file signature or version not valid\n");
fclose(rresFile);
}
return chunk;
}
// Unload resource chunk from memory
void rresUnloadResourceChunk(rresResourceChunk chunk)
{
RRES_FREE(chunk.data.props); // Resource chunk properties
RRES_FREE(chunk.data.raw); // Resource chunk raw data
}
// Load resource from file by id
// NOTE: All resources conected to base id are loaded
rresResourceMulti rresLoadResourceMulti(const char *fileName, int rresId)
{
rresResourceMulti rres = { 0 };
FILE *rresFile = fopen(fileName, "rb");
if (rresFile == NULL) RRES_LOG("RRES: WARNING: [%s] rres file could not be opened\n", fileName);
else
{
rresFileHeader header = { 0 };
// Read rres file header
fread(&header, sizeof(rresFileHeader), 1, rresFile);
// Verify file signature: "rres" and file version: 100
if (((header.id[0] == 'r') && (header.id[1] == 'r') && (header.id[2] == 'e') && (header.id[3] == 's')) && (header.version == 100))
{
bool found = false;
// Check all available chunks looking for the requested id
for (int i = 0; i < header.chunkCount; i++)
{
rresResourceChunkInfo info = { 0 };
// Read resource info header
fread(&info, sizeof(rresResourceChunkInfo), 1, rresFile);
// Check if resource id is the requested one
if (info.id == rresId)
{
found = true;
RRES_LOG("RRES: INFO: Found requested resource id: 0x%08x\n", info.id);
RRES_LOG("RRES: %c%c%c%c: Id: 0x%08x | Base size: %i | Packed size: %i\n", info.type[0], info.type[1], info.type[2], info.type[3], info.id, info.baseSize, info.packedSize);
rres.count = 1;
long currentFileOffset = ftell(rresFile); // Store current file position
rresResourceChunkInfo temp = info; // Temp info header to scan resource chunks
// Count all linked resource chunks checking temp.nextOffset
while (temp.nextOffset != 0)
{
fseek(rresFile, temp.nextOffset, SEEK_SET); // Jump to next linked resource
fread(&temp, sizeof(rresResourceChunkInfo), 1, rresFile); // Read next resource info header
rres.count++;
}
rres.chunks = (rresResourceChunk *)RRES_CALLOC(rres.count, sizeof(rresResourceChunk)); // Load as many rres slots as required
fseek(rresFile, currentFileOffset, SEEK_SET); // Return to first resource chunk position
// Read and load data chunk from file data
// NOTE: Read data can be compressed/encrypted,
// it's up to the user library to manage decompression/decryption
void *data = RRES_MALLOC(info.packedSize); // Allocate enough memory to store resource data chunk
fread(data, info.packedSize, 1, rresFile); // Read data: propsCount + props[] + data (+additional_data)
// Get chunk.data properly organized (only if uncompressed/unencrypted)
rres.chunks[0].data = rresLoadResourceChunkData(info, data);
rres.chunks[0].info = info;
RRES_FREE(data);
int i = 1;
// Load all linked resource chunks
while (info.nextOffset != 0)
{
fseek(rresFile, info.nextOffset, SEEK_SET); // Jump to next resource chunk
fread(&info, sizeof(rresResourceChunkInfo), 1, rresFile); // Read next resource info header
RRES_LOG("RRES: %c%c%c%c: Id: 0x%08x | Base size: %i | Packed size: %i\n", info.type[0], info.type[1], info.type[2], info.type[3], info.id, info.baseSize, info.packedSize);
void *data = RRES_MALLOC(info.packedSize); // Allocate enough memory to store resource data chunk
fread(data, info.packedSize, 1, rresFile); // Read data: propsCount + props[] + data (+additional_data)
// Get chunk.data properly organized (only if uncompressed/unencrypted)
rres.chunks[i].data = rresLoadResourceChunkData(info, data);
rres.chunks[i].info = info;
RRES_FREE(data);
i++;
}
break; // Resource id found and loaded, stop checking the file
}
else
{
// Skip required data size to read next resource info header
fseek(rresFile, info.packedSize, SEEK_CUR);
}
}
if (!found) RRES_LOG("RRES: WARNING: Requested resource not found: 0x%08x\n", rresId);
}
else RRES_LOG("RRES: WARNING: The provided file is not a valid rres file, file signature or version not valid\n");
fclose(rresFile);
}
return rres;
}
// Unload resource data
void rresUnloadResourceMulti(rresResourceMulti multi)
{
for (unsigned int i = 0; i < multi.count; i++) rresUnloadResourceChunk(multi.chunks[i]);
RRES_FREE(multi.chunks);
}
// Load resource chunk info for provided id
RRESAPI rresResourceChunkInfo rresLoadResourceChunkInfo(const char *fileName, int rresId)
{
rresResourceChunkInfo info = { 0 };
FILE *rresFile = fopen(fileName, "rb");
if (rresFile != NULL)
{
rresFileHeader header = { 0 };
fread(&header, sizeof(rresFileHeader), 1, rresFile);
// Verify file signature: "rres", file version: 100
if (((header.id[0] == 'r') && (header.id[1] == 'r') && (header.id[2] == 'e') && (header.id[3] == 's')) && (header.version == 100))
{
// Try to find provided resource chunk id and read info chunk
for (int i = 0; i < header.chunkCount; i++)
{
// Read resource chunk info
fread(&info, sizeof(rresResourceChunkInfo), 1, rresFile);
if (info.id == rresId)
{
// TODO: Jump to next resource chunk for provided id
//if (info.nextOffset > 0) fseek(rresFile, info.nextOffset, SEEK_SET);
break; // If requested rresId is found, we return the read rresResourceChunkInfo
}
else fseek(rresFile, info.packedSize, SEEK_CUR); // Jump to next resource
}
}
else RRES_LOG("RRES: WARNING: The provided file is not a valid rres file, file signature or version not valid\n");
fclose(rresFile);
}
return info;
}
// Load all resource chunks info
RRESAPI rresResourceChunkInfo *rresLoadResourceChunkInfoAll(const char *fileName, unsigned int *chunkCount)
{
rresResourceChunkInfo *infos = { 0 };
unsigned int count = 0;
FILE *rresFile = fopen(fileName, "rb");
if (rresFile != NULL)
{
rresFileHeader header = { 0 };
fread(&header, sizeof(rresFileHeader), 1, rresFile);
// Verify file signature: "rres", file version: 100
if (((header.id[0] == 'r') && (header.id[1] == 'r') && (header.id[2] == 'e') && (header.id[3] == 's')) && (header.version == 100))
{
// Load all resource chunks info
infos = (rresResourceChunkInfo *)RRES_CALLOC(header.chunkCount, sizeof(rresResourceChunkInfo));
count = header.chunkCount;
for (unsigned int i = 0; i < count; i++)
{
fread(&infos[i], sizeof(rresResourceChunkInfo), 1, rresFile); // Read resource chunk info
if (infos[i].nextOffset > 0) fseek(rresFile, infos[i].nextOffset, SEEK_SET); // Jump to next resource
else fseek(rresFile, infos[i].packedSize, SEEK_CUR); // Jump to next resource
}
}
else RRES_LOG("RRES: WARNING: The provided file is not a valid rres file, file signature or version not valid\n");
fclose(rresFile);
}
*chunkCount = count;
return infos;
}
// Load central directory data
rresCentralDir rresLoadCentralDirectory(const char *fileName)
{
rresCentralDir dir = { 0 };
FILE *rresFile = fopen(fileName, "rb");
if (rresFile != NULL)
{
rresFileHeader header = { 0 };
fread(&header, sizeof(rresFileHeader), 1, rresFile);
// Verify file signature: "rres", file version: 100
if (((header.id[0] == 'r') && (header.id[1] == 'r') && (header.id[2] == 'e') && (header.id[3] == 's')) && (header.version == 100))
{
// Check if there is a Central Directory available
if (header.cdOffset == 0) RRES_LOG("RRES: WARNING: CDIR: No central directory found\n");
else
{
rresResourceChunkInfo info = { 0 };
fseek(rresFile, header.cdOffset, SEEK_CUR); // Move to central directory position
fread(&info, sizeof(rresResourceChunkInfo), 1, rresFile); // Read resource info
// Verify resource type is CDIR
if ((info.type[0] == 'C') && (info.type[1] == 'D') && (info.type[2] == 'I') && (info.type[3] == 'R'))
{
RRES_LOG("RRES: CDIR: Central Directory found at offset: 0x%08x\n", header.cdOffset);
void *data = RRES_MALLOC(info.packedSize);
fread(data, info.packedSize, 1, rresFile);
// Load resource chunk data (central directory), data is uncompressed/unencrypted by default
rresResourceChunkData chunkData = rresLoadResourceChunkData(info, data);
RRES_FREE(data);
dir.count = chunkData.props[0]; // File entries count
RRES_LOG("RRES: CDIR: Central Directory file entries count: %i\n", dir.count);
unsigned char *ptr = (unsigned char *)chunkData.raw;
dir.entries = (rresDirEntry *)RRES_CALLOC(dir.count, sizeof(rresDirEntry));
for (unsigned int i = 0; i < dir.count; i++)
{
dir.entries[i].id = ((int *)ptr)[0]; // Resource id
dir.entries[i].offset = ((int *)ptr)[1]; // Resource offset in file
// NOTE: There is a reserved integer value before fileNameSize
dir.entries[i].fileNameSize = ((int *)ptr)[3]; // Resource fileName size
// Resource fileName, NULL terminated and 0-padded to 4-byte,
// fileNameSize considers NULL and padding
memcpy(dir.entries[i].fileName, ptr + 16, dir.entries[i].fileNameSize);
ptr += (16 + dir.entries[i].fileNameSize); // Move pointer for next entry
}
RRES_FREE(chunkData.props);
RRES_FREE(chunkData.raw);
}
}
}
else RRES_LOG("RRES: WARNING: The provided file is not a valid rres file, file signature or version not valid\n");
fclose(rresFile);
}
return dir;
}
// Unload central directory data
void rresUnloadCentralDirectory(rresCentralDir dir)
{
RRES_FREE(dir.entries);
}
// Get rresResourceDataType from FourCC code
// NOTE: Function expects to receive a char[4] array
unsigned int rresGetDataType(const unsigned char *fourCC)
{
unsigned int type = 0;
if (fourCC != NULL)
{
if (memcmp(fourCC, "NULL", 4) == 0) type = RRES_DATA_NULL; // Reserved for empty chunks, no props/data
else if (memcmp(fourCC, "RAWD", 4) == 0) type = RRES_DATA_RAW; // Raw file data, input file is not processed, just packed as is
else if (memcmp(fourCC, "TEXT", 4) == 0) type = RRES_DATA_TEXT; // Text file data, byte data extracted from text file
else if (memcmp(fourCC, "IMGE", 4) == 0) type = RRES_DATA_IMAGE; // Image file data, pixel data extracted from image file
else if (memcmp(fourCC, "WAVE", 4) == 0) type = RRES_DATA_WAVE; // Audio file data, samples data extracted from audio file
else if (memcmp(fourCC, "VRTX", 4) == 0) type = RRES_DATA_VERTEX; // Vertex file data, extracted from a mesh file
else if (memcmp(fourCC, "FNTG", 4) == 0) type = RRES_DATA_FONT_GLYPHS; // Font glyphs info, generated from an input font file
else if (memcmp(fourCC, "LINK", 4) == 0) type = RRES_DATA_LINK; // External linked file, filepath as provided on file input
else if (memcmp(fourCC, "CDIR", 4) == 0) type = RRES_DATA_DIRECTORY; // Central directory for input files relation to resource chunks
}
/*
// Assign type (unsigned int) FourCC (char[4])
if ((fourCC[0] == 'N') && (fourCC[1] == 'U') && (fourCC[2] == 'L') && (fourCC[3] == 'L')) type = RRES_DATA_NULL; // NULL
if ((fourCC[0] == 'R') && (fourCC[1] == 'A') && (fourCC[2] == 'W') && (fourCC[3] == 'D')) type = RRES_DATA_RAW; // RAWD
else if ((fourCC[0] == 'T') && (fourCC[1] == 'E') && (fourCC[2] == 'X') && (fourCC[3] == 'T')) type = RRES_DATA_TEXT; // TEXT
else if ((fourCC[0] == 'I') && (fourCC[1] == 'M') && (fourCC[2] == 'G') && (fourCC[3] == 'E')) type = RRES_DATA_IMAGE; // IMGE
else if ((fourCC[0] == 'W') && (fourCC[1] == 'A') && (fourCC[2] == 'V') && (fourCC[3] == 'E')) type = RRES_DATA_WAVE; // WAVE
else if ((fourCC[0] == 'V') && (fourCC[1] == 'R') && (fourCC[2] == 'T') && (fourCC[3] == 'X')) type = RRES_DATA_VERTEX; // VRTX
else if ((fourCC[0] == 'F') && (fourCC[1] == 'N') && (fourCC[2] == 'T') && (fourCC[3] == 'G')) type = RRES_DATA_FONT_GLYPHS; // FNTG
else if ((fourCC[0] == 'L') && (fourCC[1] == 'I') && (fourCC[2] == 'N') && (fourCC[3] == 'K')) type = RRES_DATA_LINK; // LINK
else if ((fourCC[0] == 'C') && (fourCC[1] == 'D') && (fourCC[2] == 'I') && (fourCC[3] == 'R')) type = RRES_DATA_DIRECTORY; // CDIR
*/
return type;
}
// Get resource identifier from filename
// WARNING: It requires the central directory previously loaded
int rresGetResourceId(rresCentralDir dir, const char *fileName)
{
int id = 0;
for (unsigned int i = 0, len = 0; i < dir.count; i++)
{
len = (unsigned int)strlen(fileName);
// NOTE: entries[i].fileName is NULL terminated and padded to 4-bytes
if (strncmp((const char *)dir.entries[i].fileName, fileName, len) == 0)
{
id = dir.entries[i].id;
break;
}
}
return id;
}
// Compute CRC32 hash
// NOTE: CRC32 is used as rres id, generated from original filename
unsigned int rresComputeCRC32(unsigned char *data, int len)
{
static unsigned int crcTable[256] = {
0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F, 0xE963A535, 0x9E6495A3,
0x0eDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988, 0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91,
0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE, 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7,
0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, 0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5,
0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172, 0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B,
0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940, 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59,
0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423, 0xCFBA9599, 0xB8BDA50F,
0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924, 0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D,
0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433,
0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, 0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01,
0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E, 0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457,
0x65B0D9C6, 0x12B7E950, 0x8BBEB8EA, 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65,
0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2, 0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB,
0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0, 0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9,
0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086, 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F,
0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17, 0x2EB40D81, 0xB7BD5C3B, 0xC0BA6CAD,
0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A, 0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683,
0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8, 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1,
0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7,
0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC, 0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5,
0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B,
0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55, 0x316E8EEF, 0x4669BE79,
0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236, 0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F,
0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D,
0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A, 0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713,
0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38, 0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21,
0x86D3D2D4, 0xF1D4E242, 0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777,
0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C, 0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45,
0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2, 0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB,
0xAED16A4A, 0xD9D65ADC, 0x40DF0B66, 0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9,
0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605, 0xCDD70693, 0x54DE5729, 0x23D967BF,
0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94, 0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D
};
unsigned int crc = ~0u;
for (int i = 0; i < len; i++) crc = (crc >> 8)^crcTable[data[i]^(crc&0xff)];
return ~crc;
}
// Set password to be used on data decryption
void rresSetCipherPassword(const char *pass)
{
password = pass;
}
// Get password to be used on data decryption
const char *rresGetCipherPassword(void)
{
if (password == NULL) password = "password12345";
return password;
}
//----------------------------------------------------------------------------------
// Module Internal Functions Definition
//----------------------------------------------------------------------------------
// Load user resource chunk from resource packed data (as contained in .rres file)
// WARNING: Data can be compressed and/or encrypted, in those cases is up to the user to process it,
// and chunk.data.propCount = 0, chunk.data.props = NULL and chunk.data.raw contains all resource packed data
static rresResourceChunkData rresLoadResourceChunkData(rresResourceChunkInfo info, void *data)
{
rresResourceChunkData chunkData = { 0 };
// CRC32 data validation, verify packed data is not corrupted
unsigned int crc32 = rresComputeCRC32((unsigned char *)data, info.packedSize);
if ((rresGetDataType(info.type) != RRES_DATA_NULL) && (crc32 == info.crc32)) // Make sure chunk contains data and data is not corrupted
{
// Check if data chunk is compressed/encrypted to retrieve properties + data
if ((info.compType == RRES_COMP_NONE) && (info.cipherType == RRES_CIPHER_NONE))
{
// Data is not compressed/encrypted (info.packedSize = info.baseSize)
chunkData.propCount = ((unsigned int *)data)[0];
if (chunkData.propCount > 0)
{
chunkData.props = (unsigned int *)RRES_CALLOC(chunkData.propCount, sizeof(unsigned int));
for (unsigned int i = 0; i < chunkData.propCount; i++) chunkData.props[i] = ((unsigned int *)data)[i + 1];
}
int rawSize = info.baseSize - sizeof(int) - (chunkData.propCount*sizeof(int));
chunkData.raw = RRES_MALLOC(rawSize);
memcpy(chunkData.raw, ((unsigned char *)data) + sizeof(int) + (chunkData.propCount*sizeof(int)), rawSize);
}
else
{
// Data is compressed/encrypted
// We just return the loaded resource packed data from .rres file,
// it's up to the user to manage decompression/decryption on user library
chunkData.raw = RRES_MALLOC(info.packedSize);
memcpy(chunkData.raw, (unsigned char *)data, info.packedSize);
}
}
if (crc32 != info.crc32) RRES_LOG("RRES: WARNING: [ID %i] CRC32 does not match, data can be corrupted\n", info.id);
return chunkData;
}
#endif // RRES_IMPLEMENTATION