mirror of https://github.com/axmolengine/axmol.git
335 lines
12 KiB
C++
335 lines
12 KiB
C++
/****************************************************************************
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Copyright (c) 2010-2012 cocos2d-x.org
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Copyright (c) 2013-2016 Chukong Technologies Inc.
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Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.
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Copyright (c) 2020 c4games.com
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http://www.cocos2d-x.org
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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****************************************************************************/
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#ifndef __SUPPORT_ZIPUTILS_H__
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#define __SUPPORT_ZIPUTILS_H__
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/// @cond DO_NOT_SHOW
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#include "platform/CCPlatformMacros.h"
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#include "platform/CCFileUtils.h"
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#include <string>
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#if (CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID)
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#include "platform/android/CCFileUtils-android.h"
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#elif(CC_TARGET_PLATFORM == CC_PLATFORM_WIN32)
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// for import ssize_t on win32 platform
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#include "platform/CCStdC.h"
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#endif
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#ifndef _unz64_H
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typedef struct unz_file_info_s unz_file_info;
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#endif
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/**
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* @addtogroup base
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* @{
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*/
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namespace cocos2d
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{
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/** XXX: pragma pack ???
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* @struct CCZHeader
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*/
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struct CCZHeader {
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unsigned char sig[4]; /** Signature. Should be 'CCZ!' 4 bytes. */
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unsigned short compression_type; /** Should be 0. */
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unsigned short version; /** Should be 2 (although version type==1 is also supported). */
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unsigned int reserved; /** Reserved for users. */
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unsigned int len; /** Size of the uncompressed file. */
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};
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enum {
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CCZ_COMPRESSION_ZLIB, /** zlib format. */
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CCZ_COMPRESSION_BZIP2, /** bzip2 format (not supported yet). */
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CCZ_COMPRESSION_GZIP, /** gzip format (not supported yet). */
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CCZ_COMPRESSION_NONE, /** plain (not supported yet). */
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};
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class CC_DLL ZipUtils
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{
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public:
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/**
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* Inflates either zlib or gzip deflated memory. The inflated memory is expected to be freed by the caller.
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*
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* It will allocate 256k for the destination buffer. If it is not enough it will multiply the previous buffer size per 2, until there is enough memory.
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*
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* @return The length of the deflated buffer.
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* @since v0.8.1
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*/
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static ssize_t inflateMemory(unsigned char *in, ssize_t inLength, unsigned char **out);
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/**
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* Inflates either zlib or gzip deflated memory. The inflated memory is expected to be freed by the caller.
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*
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* @param outLengthHint It is assumed to be the needed room to allocate the inflated buffer.
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*
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* @return The length of the deflated buffer.
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* @since v1.0.0
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*/
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static ssize_t inflateMemoryWithHint(unsigned char *in, ssize_t inLength, unsigned char **out, ssize_t outLengthHint);
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/**
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* Inflates a GZip file into memory.
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*
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* @return The length of the deflated buffer.
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* @since v0.99.5
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*/
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static int inflateGZipFile(const char *filename, unsigned char **out);
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/**
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* Test a file is a GZip format file or not.
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*
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* @return True is a GZip format file. false is not.
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* @since v3.0
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*/
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static bool isGZipFile(const char *filename);
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/**
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* Test the buffer is GZip format or not.
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*
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* @return True is GZip format. false is not.
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* @since v3.0
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*/
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static bool isGZipBuffer(const unsigned char *buffer, ssize_t len);
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/**
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* Inflates a CCZ file into memory.
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*
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* @return The length of the deflated buffer.
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* @since v0.99.5
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*/
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static int inflateCCZFile(const char *filename, unsigned char **out);
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/**
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* Inflates a buffer with CCZ format into memory.
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*
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* @return The length of the deflated buffer.
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* @since v3.0
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*/
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static int inflateCCZBuffer(const unsigned char *buffer, ssize_t len, unsigned char **out);
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/**
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* Test a file is a CCZ format file or not.
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*
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* @return True is a CCZ format file. false is not.
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* @since v3.0
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*/
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static bool isCCZFile(const char *filename);
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/**
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* Test the buffer is CCZ format or not.
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*
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* @return True is CCZ format. false is not.
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* @since v3.0
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*/
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static bool isCCZBuffer(const unsigned char *buffer, ssize_t len);
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/**
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* Sets the pvr.ccz encryption key parts separately for added security.
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*
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* Example: If the key used to encrypt the pvr.ccz file is
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* 0xaaaaaaaabbbbbbbbccccccccdddddddd you will call this function 4
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* different times, preferably from 4 different source files, as follows
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*
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* ZipUtils::setPvrEncryptionKeyPart(0, 0xaaaaaaaa);
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* ZipUtils::setPvrEncryptionKeyPart(1, 0xbbbbbbbb);
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* ZipUtils::setPvrEncryptionKeyPart(2, 0xcccccccc);
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* ZipUtils::setPvrEncryptionKeyPart(3, 0xdddddddd);
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*
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* Splitting the key into 4 parts and calling the function from 4 different source
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* files increases the difficulty to reverse engineer the encryption key.
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* Be aware that encryption is *never* 100% secure and the key code
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* can be cracked by knowledgable persons.
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*
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* IMPORTANT: Be sure to call setPvrEncryptionKey or
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* setPvrEncryptionKeyPart with all of the key parts *before* loading
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* the sprite sheet or decryption will fail and the sprite sheet
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* will fail to load.
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*
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* @param index Part of the key [0..3].
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* @param value Value of the key part.
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*/
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static void setPvrEncryptionKeyPart(int index, unsigned int value);
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/**
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* Sets the pvr.ccz encryption key.
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*
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* Example: If the key used to encrypt the pvr.ccz file is
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* 0xaaaaaaaabbbbbbbbccccccccdddddddd you will call this function with
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* the key split into 4 parts as follows
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*
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* ZipUtils::setPvrEncryptionKey(0xaaaaaaaa, 0xbbbbbbbb, 0xcccccccc, 0xdddddddd);
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*
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* Note that using this function makes it easier to reverse engineer and discover
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* the complete key because the key parts are present in one function call.
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*
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* IMPORTANT: Be sure to call setPvrEncryptionKey or setPvrEncryptionKeyPart
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* with all of the key parts *before* loading the spritesheet or decryption
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* will fail and the sprite sheet will fail to load.
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*
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* @param keyPart1 The key value part 1.
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* @param keyPart2 The key value part 2.
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* @param keyPart3 The key value part 3.
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* @param keyPart4 The key value part 4.
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*/
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static void setPvrEncryptionKey(unsigned int keyPart1, unsigned int keyPart2, unsigned int keyPart3, unsigned int keyPart4);
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private:
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static int inflateMemoryWithHint(unsigned char *in, ssize_t inLength, unsigned char **out, ssize_t *outLength, ssize_t outLengthHint);
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static inline void decodeEncodedPvr (unsigned int *data, ssize_t len);
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static inline unsigned int checksumPvr(const unsigned int *data, ssize_t len);
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static unsigned int s_uEncryptedPvrKeyParts[4];
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static unsigned int s_uEncryptionKey[1024];
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static bool s_bEncryptionKeyIsValid;
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};
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// forward declaration
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struct ZipEntryInfo;
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class ZipFilePrivate;
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struct unz_file_info_s;
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struct ZipFileStream
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{
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ZipEntryInfo* entry;
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long offset;
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};
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/**
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* Zip file - reader helper class.
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*
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* It will cache the file list of a particular zip file with positions inside an archive,
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* so it would be much faster to read some particular files or to check their existence.
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*
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* @since v2.0.5
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*/
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class CC_DLL ZipFile
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{
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public:
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/**
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* Constructor, open zip file and store file list.
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*
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* @param zipFile Zip file name
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* @param filter The first part of file names, which should be accessible.
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* For example, "assets/". Other files will be missed.
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*
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* @since v2.0.5
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*/
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ZipFile(const std::string &zipFile, const std::string &filter = std::string());
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virtual ~ZipFile();
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/**
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* Regenerate accessible file list based on a new filter string.
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*
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* @param filter New filter string (first part of files names)
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* @return true whenever zip file is open successfully and it is possible to locate
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* at least the first file, false otherwise
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*
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* @since v2.0.5
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*/
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bool setFilter(const std::string &filter);
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/**
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* Check does a file exists or not in zip file
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*
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* @param fileName File to be checked on existence
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* @return true whenever file exists, false otherwise
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*
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* @since v2.0.5
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*/
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bool fileExists(const std::string &fileName) const;
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/**
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* Get files and folders in pathname
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*
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* @param dirname
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* @return
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*/
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std::vector<std::string> listFiles(const std::string &pathname) const;
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/**
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* Get resource file data from a zip file.
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* @param fileName File name
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* @param[out] size If the file read operation succeeds, it will be the data size, otherwise 0.
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* @return Upon success, a pointer to the data is returned, otherwise nullptr.
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* @warning Recall: you are responsible for calling free() on any Non-nullptr pointer returned.
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*
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* @since v2.0.5
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*/
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unsigned char *getFileData(const std::string &fileName, ssize_t *size);
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/**
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* Get resource file data from a zip file.
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* @param fileName File name
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* @param[out] buffer If the file read operation succeeds, if will contain the file data.
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* @return True if successful.
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*/
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bool getFileData(const std::string &fileName, ResizableBuffer* buffer);
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std::string getFirstFilename();
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std::string getNextFilename();
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static ZipFile *createWithBuffer(const void* buffer, unsigned long size);
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/**
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* zipFile Streaming support, !!!important, the file in zip must no compress level, otherwise
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* stream seek doesn't work.
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*/
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bool zfopen(const std::string& fileName, ZipFileStream* zfs);
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int zfread(ZipFileStream* zfs, void* buf, unsigned int size);
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long zfseek(ZipFileStream* zfs, long offset, int origin);
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void zfclose(ZipFileStream* zfs);
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/**
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* Gets resource file data from a zip file.
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*
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* @param[in] filename The resource file name which contains the relative path of the zip file.
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* @param[out] size If the file read operation succeeds, it will be the data size, otherwise 0.
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* @return Upon success, a pointer to the data is returned, otherwise nullptr.
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* @warning Recall: you are responsible for calling free() on any Non-nullptr pointer returned.
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*/
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CC_DEPRECATED() static unsigned char* getFileDataFromZip(const std::string& zipFilePath, const std::string& filename, ssize_t* size);
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private:
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/* Only used internal for createWithBuffer() */
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ZipFile();
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bool initWithBuffer(const void *buffer, unsigned long size);
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int getCurrentFileInfo(std::string *filename, unz_file_info *info);
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/** Internal data like zip file pointer / file list array and so on */
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ZipFilePrivate *_data;
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};
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} // end of namespace cocos2d
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// end group
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/// @}
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/// @endcond
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#endif // __SUPPORT_ZIPUTILS_H__
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