69 lines
2.4 KiB
C++
69 lines
2.4 KiB
C++
#include<hgl/io/FileAccess.h>
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#include<hgl/log/LogInfo.h>
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#include<io.h>
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#include<share.h>
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#include<fcntl.h>
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namespace hgl
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{
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namespace io
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{
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bool FileAccess::CreateTemp()
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{
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const uint buf_size=HGL_MAX_PATH;
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u16char PathBuffer[buf_size];
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u16char TempName[buf_size];
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GetTempPathW(buf_size,PathBuffer);
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GetTempFileNameW(PathBuffer,L"NEW",0,TempName);
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return Open(TempName,fomCreate);
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}
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int OpenFile(const os_char *fn,FileOpenMode fom)
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{
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int fp;
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errno_t result;
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if(fom==fomCreate )result=_wsopen_s(&fp,fn,_O_BINARY|_O_WRONLY|_O_CREAT ,_SH_DENYNO,S_IREAD|_S_IWRITE);else
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if(fom==fomCreateTrunc )result=_wsopen_s(&fp,fn,_O_BINARY|_O_WRONLY|_O_CREAT|_O_TRUNC ,_SH_DENYNO,S_IREAD|_S_IWRITE);else
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// if(fom==fomCreateTemp )result=_wsopen_s(&fp,fn,_O_BINARY|_O_WRONLY|_O_CREAT|_O_TEMPORARY ,_SH_DENYNO,S_IREAD|_S_IWRITE);else //某些平台不支持，所以全都不使用fomCreateTemp,统一使用CreateTemp
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if(fom==fomOnlyRead )result=_wsopen_s(&fp,fn,_O_BINARY|_O_RDONLY ,_SH_DENYNO,S_IREAD|_S_IWRITE);else
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if(fom==fomOnlyWrite )result=_wsopen_s(&fp,fn,_O_BINARY|_O_WRONLY ,_SH_DENYNO,S_IREAD|_S_IWRITE);else
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if(fom==fomReadWrite )result=_wsopen_s(&fp,fn,_O_BINARY|_O_RDWR ,_SH_DENYNO,S_IREAD|_S_IWRITE);else
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if(fom==fomAppend )result=_wsopen_s(&fp,fn,_O_BINARY|_O_APPEND ,_SH_DENYNO,S_IREAD|_S_IWRITE);else
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RETURN_ERROR(-1);
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return(fp);
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}
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void CloseFile(int fp)
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{
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_close(fp);
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}
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int64 FileAccess::Read(int64 offset,void *buf,int64 size)
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{
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if(!CanRead())return(-1);
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if(_lseeki64(fp,offset,(int)SeekOrigin::Begin)==offset)
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return _read(fp,buf,size);
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else
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return -1;
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}
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int64 FileAccess::Write(int64 offset,const void *buf,int64 size)
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{
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if(!CanWrite())return(-1);
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if(_lseeki64(fp,offset,(int)SeekOrigin::Begin)==offset)
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return _write(fp,buf,size);
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else
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return -1;
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}
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}//namespace io
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}//namespace hgl
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