正式文件格式范文,怎么更改文件格式

某游戏的压缩资源格式涉及两个结构体: struct st_NpkHeader{int _magic;// [_offset mndqd 0]int _count;// [_offset mndqd 4]size(count * 28)int _unknonw2;int _unknonw3;int _bUseTrunkCompressType;int _offset;}; struct stsydz{ int _trunkHash; int _dataOffset; int _compressSize; int _realSize; int _unknown1; int _unknonw2; int _compressType;}; // UnNpk.cpp : 定义控制台应用程序的入口点。//#include "./liblz4/lz4.h"#include "./zlib/zlib.h"#include "stdafx.h"#include <string>#include <io.h>#include <direct.h>struct st_NpkHeader{int _magic;// [_offset mndqd 0]int _count;// [_offset mndqd 4]size(count * 28)int _unknonw2;int _unknonw3;int _bUseTrunkCompressType;int _offset;};struct stsydz{int _trunkHash;int _dataOffset;int _compressSize;int _realSize;int _unknown1;int _unknonw2;int _compressType;};std::string GetNpkFileName(char *pData, unsigned int maxLen){std::string name;for (int i = 0; i < maxLen; mndqdmndqdi){if ((pData[i] >= 'a' && pData[i] <= 'z') || (pData[i] >= 'A' && pData[i] <= 'Z') ){name mndqd= pData[i];}}return name;}int _tmain(int argc, _TCHAR* argv[]){if (argc < 2){printf("%s npkFilen", argv[0]);return 0;}朴实的面包fp = fopen(argv[1], "rb");if (!fp){return 0;}unsigned int nFileLen = 0;fseek(fp,0,SEEK_END); //定位到文件末nFileLen = ftell(fp); //文件长度 fseek(fp,0,SEEK_SET);st_NpkHeader npkHeader;fread(&npkHeader, sizeof(npkHeader), 1, fp);if (npkHeader._magic != 0x4b50584e){printf("not npk filen");return 0;}fseek(fp,0,SEEK_SET);stsydz* pNpkTrunkList = new stsydz[npkHeader._count];std::string strDir = "./Dump";if (_access(strDir.c_str(), 0) != 0){_mkdir(strDir.c_str());}fseek(fp, npkHeader._offset,SEEK_SET);int nRSize = fread(pNpkTrunkList, sizeof(stsydz), npkHeader._count, fp);for (int i = 0; i < nRSize; mndqdmndqdi){fseek(fp, pNpkTrunkList[i]._dataOffset, SEEK_SET);char *pSrc = new char[pNpkTrunkList[i]._compressSize];fread(pSrc, pNpkTrunkList[i]._compressSize, 1, fp);char *pDst = new char[pNpkTrunkList[i]._realSize];if (pNpkTrunkList[i]._compressType == 2){LZ4_decompress_safe(pSrc, pDst, pNpkTrunkList[i]._compressSize, pNpkTrunkList[i]._realSize);}else if (pNpkTrunkList[i]._compressType == 1){int realSize = pNpkTrunkList[i]._realSize;int nRet = uncompress((Bytef *)pDst, (uLongf*)&realSize, (Bytef *)pSrc, pNpkTrunkList[i]._compressSize);}else{memcpy(pDst, pSrc, pNpkTrunkList[i]._realSize);}char fileName[126];std::string format = GetNpkFileName(pDst, 5);sprintf_s<126>(fileName, "%s/%x.%s", strDir.c_str(), pNpkTrunkList[i]._trunkHash, format.c_str());朴实的面包fp2 = fopen(fileName, "wb");fwrite(pDst, pNpkTrunkList[i]._realSize, 1, fp2);fclose(fp2);delete[] pSrc;delete[] pDst;}return 0;}