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