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      1 // Common/C_FileIO.h
      2 
      3 #include "C_FileIO.h"
      4 
      5 #include <fcntl.h>
      6 #include <unistd.h>
      7 
      8 namespace NC {
      9 namespace NFile {
     10 namespace NIO {
     11 
     12 bool CFileBase::OpenBinary(const char *name, int flags)
     13 {
     14   #ifdef O_BINARY
     15   flags |= O_BINARY;
     16   #endif
     17   Close();
     18   _handle = ::open(name, flags, 0666);
     19   return _handle != -1;
     20 }
     21 
     22 bool CFileBase::Close()
     23 {
     24   if (_handle == -1)
     25     return true;
     26   if (close(_handle) != 0)
     27     return false;
     28   _handle = -1;
     29   return true;
     30 }
     31 
     32 bool CFileBase::GetLength(UInt64 &length) const
     33 {
     34   off_t curPos = Seek(0, SEEK_CUR);
     35   off_t lengthTemp = Seek(0, SEEK_END);
     36   Seek(curPos, SEEK_SET);
     37   length = (UInt64)lengthTemp;
     38   return true;
     39 }
     40 
     41 off_t CFileBase::Seek(off_t distanceToMove, int moveMethod) const
     42 {
     43   return ::lseek(_handle, distanceToMove, moveMethod);
     44 }
     45 
     46 /////////////////////////
     47 // CInFile
     48 
     49 bool CInFile::Open(const char *name)
     50 {
     51   return CFileBase::OpenBinary(name, O_RDONLY);
     52 }
     53 
     54 bool CInFile::OpenShared(const char *name, bool)
     55 {
     56   return Open(name);
     57 }
     58 
     59 ssize_t CInFile::Read(void *data, size_t size)
     60 {
     61   return read(_handle, data, size);
     62 }
     63 
     64 /////////////////////////
     65 // COutFile
     66 
     67 bool COutFile::Create(const char *name, bool createAlways)
     68 {
     69   if (createAlways)
     70   {
     71     Close();
     72     _handle = ::creat(name, 0666);
     73     return _handle != -1;
     74   }
     75   return OpenBinary(name, O_CREAT | O_EXCL | O_WRONLY);
     76 }
     77 
     78 bool COutFile::Open(const char *name, DWORD creationDisposition)
     79 {
     80   return Create(name, false);
     81 }
     82 
     83 ssize_t COutFile::Write(const void *data, size_t size)
     84 {
     85   return write(_handle, data, size);
     86 }
     87 
     88 }}}
     89