zip_support/ioapi

最新推荐文章于 2023-01-13 01:25:16 发布

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最新推荐文章于 2023-01-13 01:25:16 发布

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分类专栏： cocos2dx/support

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本文介绍了一个用于处理ZIP文件的跨平台IO API实现细节，包括针对不同操作系统定义的宏与函数，如fopen64、ftello64等，以支持大型文件操作。

/* ioapi.h -- IO base function header for compress/uncompress .zip

part of the MiniZip project - (http://www.winimage.com/zLibDll/minizip.html )

Modifications for Zip64 support

For more info read MiniZip_info.txt

Changes

Oct-2009 - Defined ZPOS64_T to fpos_t on windows and u_int64_t on linux. (might need to find a better why for this)

Oct-2009 - Change to fseeko64, ftello64 and fopen64 so large files would work on linux.

More if/def section may be needed to support other platforms

Oct-2009 - Defined fxxxx64 calls to normal fopen/ftell/fseek so they would compile on windows.

(but you should use iowin32.c for windows instead)

#ifndef _ZLIBIOAPI64_H

#define _ZLIBIOAPI64_H

#include "platform/CCPlatformConfig.h"

#if (!defined(_WIN32)) && (!defined(WIN32))

// Linux needs this to support file operation on files larger then 4+GB

// But might need better if/def to select just the platforms that needs them.

#ifndef __USE_FILE_OFFSET64

#define __USE_FILE_OFFSET64

#endif

#ifndef __USE_LARGEFILE64

#define __USE_LARGEFILE64

#endif

#ifndef _LARGEFILE64_SOURCE

#define _LARGEFILE64_SOURCE

#endif

#ifndef _FILE_OFFSET_BIT

#define _FILE_OFFSET_BIT 64

#endif

#include <stdio.h>

#include <stdlib.h>

#include "zlib.h"

namespace cocos2d {

#if defined(USE_FILE32API)

#define fopen64 fopen

#define ftello64 ftell

#define fseeko64 fseek

#else

#ifdef _MSC_VER

#define fopen64 fopen

#if (_MSC_VER >= 1400) && (!(defined(NO_MSCVER_FILE64_FUNC)))

#define ftello64 _ftelli64

#define fseeko64 _fseeki64

#else // old MSC

#define ftello64 ftell

#define fseeko64 fseek

#endif

#ifndef ZPOS64_T

#ifdef _WIN32

#define ZPOS64_T fpos_t

#else

#include <stdint.h>

#define ZPOS64_T uint64_t

#endif

#ifdef HAVE_MINIZIP64_CONF_H

#include "mz64conf.h"

#endif

/* a type chosen by DEFINE */

#ifdef HAVE_64BIT_INT_CUSTOM

typedef 64BIT_INT_CUSTOM_TYPE ZPOS64_T;

#else

#ifdef HAS_STDINT_H

#include "stdint.h"

typedef uint64_t ZPOS64_T;

#else

#if defined(_MSC_VER) || defined(__BORLANDC__)

typedef unsigned __int64 ZPOS64_T;

#else

typedef unsigned long long int ZPOS64_T;

#endif

#define ZLIB_FILEFUNC_SEEK_CUR (1)

#define ZLIB_FILEFUNC_SEEK_END (2)

#define ZLIB_FILEFUNC_SEEK_SET (0)

#define ZLIB_FILEFUNC_MODE_READ (1)

#define ZLIB_FILEFUNC_MODE_WRITE (2)

#define ZLIB_FILEFUNC_MODE_READWRITEFILTER (3)

#define ZLIB_FILEFUNC_MODE_EXISTING (4)

#define ZLIB_FILEFUNC_MODE_CREATE (8)

#ifndef ZCALLBACK

#if (defined(WIN32) || defined(_WIN32) || defined (WINDOWS) || defined (_WINDOWS)) && defined(CALLBACK) && defined (USEWINDOWS_CALLBACK)

#define ZCALLBACK CALLBACK

#else

#define ZCALLBACK

#endif

typedef voidpf (ZCALLBACK *open_file_func) OF((voidpf opaque, const char* filename, int mode));

typedef uLong (ZCALLBACK *read_file_func) OF((voidpf opaque, voidpf stream, void* buf, uLong size));

typedef uLong (ZCALLBACK *write_file_func) OF((voidpf opaque, voidpf stream, const void* buf, uLong size));

typedef int (ZCALLBACK *close_file_func) OF((voidpf opaque, voidpf stream));

typedef int (ZCALLBACK *testerror_file_func) OF((voidpf opaque, voidpf stream));

typedef long (ZCALLBACK *tell_file_func) OF((voidpf opaque, voidpf stream));

typedef long (ZCALLBACK *seek_file_func) OF((voidpf opaque, voidpf stream, uLong offset, int origin));

/* here is the "old" 32 bits structure structure */

typedef struct zlib_filefunc_def_s

{

open_file_func zopen_file;

read_file_func zread_file;

write_file_func zwrite_file;

tell_file_func ztell_file;

seek_file_func zseek_file;

close_file_func zclose_file;

testerror_file_func zerror_file;

voidpf opaque;

} zlib_filefunc_def;

typedef ZPOS64_T (ZCALLBACK *tell64_file_func) OF((voidpf opaque, voidpf stream));

typedef long (ZCALLBACK *seek64_file_func) OF((voidpf opaque, voidpf stream, ZPOS64_T offset, int origin));

typedef voidpf (ZCALLBACK *open64_file_func) OF((voidpf opaque, const void* filename, int mode));

typedef struct zlib_filefunc64_def_s

{

open64_file_func zopen64_file;

read_file_func zread_file;

write_file_func zwrite_file;

tell64_file_func ztell64_file;

seek64_file_func zseek64_file;

close_file_func zclose_file;

testerror_file_func zerror_file;

voidpf opaque;

} zlib_filefunc64_def;

void fill_fopen64_filefunc OF((zlib_filefunc64_def* pzlib_filefunc_def));

void fill_fopen_filefunc OF((zlib_filefunc_def* pzlib_filefunc_def));

/* now internal definition, only for zip.c and unzip.h */

typedef struct zlib_filefunc64_32_def_s

{

zlib_filefunc64_def zfile_func64;

open_file_func zopen32_file;

tell_file_func ztell32_file;

seek_file_func zseek32_file;

} zlib_filefunc64_32_def;

#define ZREAD64(filefunc,filestream,buf,size) ((*((filefunc).zfile_func64.zread_file)) ((filefunc).zfile_func64.opaque,filestream,buf,size))

#define ZWRITE64(filefunc,filestream,buf,size) ((*((filefunc).zfile_func64.zwrite_file)) ((filefunc).zfile_func64.opaque,filestream,buf,size))

//#define ZTELL64(filefunc,filestream) ((*((filefunc).ztell64_file)) ((filefunc).opaque,filestream))

//#define ZSEEK64(filefunc,filestream,pos,mode) ((*((filefunc).zseek64_file)) ((filefunc).opaque,filestream,pos,mode))

#define ZCLOSE64(filefunc,filestream) ((*((filefunc).zfile_func64.zclose_file)) ((filefunc).zfile_func64.opaque,filestream))

#define ZERROR64(filefunc,filestream) ((*((filefunc).zfile_func64.zerror_file)) ((filefunc).zfile_func64.opaque,filestream))

voidpf call_zopen64 OF((const zlib_filefunc64_32_def* pfilefunc,const void*filename,int mode));

long call_zseek64 OF((const zlib_filefunc64_32_def* pfilefunc,voidpf filestream, ZPOS64_T offset, int origin));

ZPOS64_T call_ztell64 OF((const zlib_filefunc64_32_def* pfilefunc,voidpf filestream));

void fill_zlib_filefunc64_32_def_from_filefunc32(zlib_filefunc64_32_def* p_filefunc64_32,const zlib_filefunc_def* p_filefunc32);

#define ZOPEN64(filefunc,filename,mode) (call_zopen64((&(filefunc)),(filename),(mode)))

#define ZTELL64(filefunc,filestream) (call_ztell64((&(filefunc)),(filestream)))

#define ZSEEK64(filefunc,filestream,pos,mode) (call_zseek64((&(filefunc)),(filestream),(pos),(mode)))

} // end of namespace cocos2d

#endif