1e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott/* 2e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott * Copyright (c) 1999 3e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott * Silicon Graphics Computer Systems, Inc. 4e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott * 5e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott * Copyright (c) 1999 6e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott * Boris Fomitchev 7e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott * 8e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott * This material is provided "as is", with absolutely no warranty expressed 9e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott * or implied. Any use is at your own risk. 10e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott * 11e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott * Permission to use or copy this software for any purpose is hereby granted 12e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott * without fee, provided the above notices are retained on all copies. 13e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott * Permission to modify the code and to distribute modified code is granted, 14e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott * provided the above notices are retained, and a notice that the code was 15e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott * modified is included with the above copyright notice. 16e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott * 17e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott */ 18e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 19e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott#include <fstream> 20e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 21e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott#if !defined (_STLP_WCE) 22e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott# ifdef __BORLANDC__ 23e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott# include <cfcntl.h> // For _O_RDONLY, etc 24e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott# else 25e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott# include <io.h> // For _get_osfhandle 26e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott# include <fcntl.h> // For _O_RDONLY, etc 27e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott# endif 28e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott# include <sys/stat.h> // For _fstat 29e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott#endif 30e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 31e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott#define _TEXTBUF_SIZE 0x1000 32e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 33e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scottconst _STLP_fd INVALID_STLP_FD = INVALID_HANDLE_VALUE; 34e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 35e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott#if !defined (INVALID_SET_FILE_POINTER) 36e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott# define INVALID_SET_FILE_POINTER 0xffffffff 37e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott#endif 38e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 39e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott#ifndef O_ACCMODE 40e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott# define O_ACCMODE (O_RDONLY|O_WRONLY|O_RDWR) 41e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott#endif 42e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 43e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott_STLP_BEGIN_NAMESPACE 44e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 45e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott#if !defined(__MSL__) && !defined(_STLP_WCE) 46e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scottstatic ios_base::openmode flag_to_openmode(int mode) { 47e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott ios_base::openmode ret = ios_base::__default_mode; 48e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 49e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott switch (mode & O_ACCMODE) { 50e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott case O_RDONLY: 51e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott ret = ios_base::in; break; 52e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott case O_WRONLY: 53e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott ret = ios_base::out; break; 54e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott case O_RDWR: 55e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott ret = ios_base::in | ios_base::out; break; 56e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott } 57e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 58e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott if (mode & O_APPEND) 59e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott ret |= ios_base::app; 60e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 61e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott if (mode & O_BINARY) 62e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott ret |= ios_base::binary; 63e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 64e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott return ret; 65e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott} 66e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott#endif 67e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 68e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott_STLP_MOVE_TO_PRIV_NAMESPACE 69e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 70e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott// Helper functions for _Filebuf_base. 71e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 72e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scottstatic bool __is_regular_file(_STLP_fd fd) { 73e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott BY_HANDLE_FILE_INFORMATION info; 74e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 75e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott // Return true if the file handle isn't a directory. 76e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott return GetFileInformationByHandle(fd, &info) && 77e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott ((info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) == 0); 78e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott} 79e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 80e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott// Number of characters in the file. 81e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scottstatic streamoff __file_size(_STLP_fd fd) { 82e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott streamoff ret = 0; 83e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 84e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott LARGE_INTEGER li; 85e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott li.LowPart = GetFileSize(fd, (unsigned long*) &li.HighPart); 86e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott if (li.LowPart != INVALID_FILE_SIZE || GetLastError() == NO_ERROR) 87e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott ret = li.QuadPart; 88e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 89e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott return ret; 90e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott} 91e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 92e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott_STLP_MOVE_TO_STD_NAMESPACE 93e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 94e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott// Visual C++ and Intel use this, but not Metrowerks 95e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott// Also MinGW, msvcrt.dll (but not crtdll.dll) dependent version 96e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott#if (defined (_STLP_MSVC_LIB) && !defined (_STLP_WCE)) || \ 97e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott (defined (__MINGW32__) && defined (__MSVCRT__)) 98e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 99e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott// fcntl(fileno, F_GETFL) for Microsoft library 100e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott// 'semi-documented' defines: 101e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott# define IOINFO_L2E 5 102e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott# define IOINFO_ARRAY_ELTS (1 << IOINFO_L2E) 103e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott# define _pioinfo(i) ( __pioinfo[(i) >> IOINFO_L2E] + \ 104e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott ((i) & (IOINFO_ARRAY_ELTS - 1)) ) 105e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott# define FAPPEND 0x20 // O_APPEND flag 106e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott# define FTEXT 0x80 // O_TEXT flag 107e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott// end of 'semi-documented' defines 108e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 109e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott// 'semi-documented' internal structure 110e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scottextern "C" { 111e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott struct ioinfo { 112e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott long osfhnd; // the real os HANDLE 113e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott char osfile; // file handle flags 114e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott char pipech; // pipe buffer 115e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott# if defined (_MT) 116e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott // multi-threaded locking 117e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott int lockinitflag; 118e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott CRITICAL_SECTION lock; 119e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott# endif 120e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott }; 121e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott# if defined (__MINGW32__) 122e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott __MINGW_IMPORT ioinfo * __pioinfo[]; 123e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott# else 124e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott extern _CRTIMP ioinfo * __pioinfo[]; 125e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott# endif 126e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott} // extern "C" 127e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott// end of 'semi-documented' declarations 128e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 129e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scottstatic ios_base::openmode _get_osfflags(int fd, HANDLE oshandle) { 130e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott char dosflags = 0; 131e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott if (fd >= 0) 132e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott dosflags = _pioinfo(fd)->osfile; 133e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott //else 134e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott //the file will be considered as open in binary mode with no append attribute 135e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott // end of 'semi-documented' stuff 136e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 137e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott int mode = 0; 138e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott if (dosflags & FAPPEND) 139e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott mode |= O_APPEND; 140e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 141e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott if (dosflags & FTEXT) 142e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott mode |= O_TEXT; 143e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott else 144e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott mode |= O_BINARY; 145e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 146e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott // For Read/Write access we have to guess 147e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott DWORD dummy, dummy2; 148e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott BOOL writeOk = WriteFile(oshandle, &dummy2, 0, &dummy, 0); 149e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott BOOL readOk = ReadFile(oshandle, &dummy2, 0, &dummy, NULL); 150e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott if (writeOk && readOk) 151e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott mode |= O_RDWR; 152e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott else if (readOk) 153e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott mode |= O_RDONLY; 154e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott else 155e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott mode |= O_WRONLY; 156e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 157e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott return flag_to_openmode(mode); 158e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott} 159e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 160e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott#elif defined (__DMC__) 161e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 162e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott# define FHND_APPEND 0x04 163e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott# define FHND_DEVICE 0x08 164e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott# define FHND_TEXT 0x10 165e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 166e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scottextern "C" unsigned char __fhnd_info[_NFILE]; 167e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 168e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scottstatic ios_base::openmode _get_osfflags(int fd, HANDLE oshandle) { 169e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott int mode = 0; 170e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 171e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott if (__fhnd_info[fd] & FHND_APPEND) 172e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott mode |= O_APPEND; 173e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 174e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott if (__fhnd_info[fd] & FHND_TEXT == 0) 175e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott mode |= O_BINARY; 176e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 177e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott for (FILE *fp = &_iob[0]; fp < &_iob[_NFILE]; fp++) { 178e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott if ((fileno(fp) == fd) && (fp->_flag & (_IOREAD | _IOWRT | _IORW))) { 179e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott const int osflags = fp->_flag; 180e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 181e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott if ((osflags & _IOREAD) && !(osflags & _IOWRT) && !(osflags & _IORW)) 182e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott mode |= O_RDONLY; 183e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott else if ((osflags & _IOWRT) && !(osflags & _IOREAD) && !(osflags & _IORW)) 184e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott mode |= O_WRONLY; 185e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott else 186e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott mode |= O_RDWR; 187e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott break; 188e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott } 189e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott } 190e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 191e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott return flag_to_openmode(mode); 192e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott} 193e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott#endif 194e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 195e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scottsize_t _Filebuf_base::_M_page_size = 4096; 196e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 197e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott_Filebuf_base::_Filebuf_base() 198e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott : _M_file_id(INVALID_STLP_FD), 199e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott _M_openmode(0), 200e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott _M_is_open(false), 201e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott _M_should_close(false), 202e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott _M_view_id(0) 203e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott{} 204e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 205e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scottvoid _Filebuf_base::_S_initialize() { 206e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott SYSTEM_INFO SystemInfo; 207e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott GetSystemInfo(&SystemInfo); 208e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott _M_page_size = SystemInfo.dwPageSize; 209e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott // might be .dwAllocationGranularity 210e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott} 211e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 212e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott// Return the size of the file. This is a wrapper for stat. 213e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott// Returns zero if the size cannot be determined or is ill-defined. 214e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scottstreamoff _Filebuf_base::_M_file_size() { 215e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott return _STLP_PRIV __file_size(_M_file_id); 216e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott} 217e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 218e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scottbool _Filebuf_base::_M_open(const char* name, ios_base::openmode openmode, 219e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott long permission) { 220e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott _STLP_fd file_no; 221e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 222e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott if (_M_is_open) 223e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott return false; 224e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 225e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott DWORD dwDesiredAccess, dwCreationDisposition; 226e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott bool doTruncate = false; 227e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 228e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott switch (openmode & (~ios_base::ate & ~ios_base::binary)) { 229e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott case ios_base::out: 230e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott case ios_base::out | ios_base::trunc: 231e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott dwDesiredAccess = GENERIC_WRITE; 232e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott dwCreationDisposition = OPEN_ALWAYS; 233e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott // boris : even though it is very non-intuitive, standard 234e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott // requires them both to behave same. 235e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott doTruncate = true; 236e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott break; 237e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott case ios_base::out | ios_base::app: 238e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott dwDesiredAccess = GENERIC_WRITE; 239e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott dwCreationDisposition = OPEN_ALWAYS; 240e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott break; 241e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott case ios_base::in: 242e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott dwDesiredAccess = GENERIC_READ; 243e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott dwCreationDisposition = OPEN_EXISTING; 244e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott permission = 0; // Irrelevant unless we're writing. 245e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott break; 246e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott case ios_base::in | ios_base::out: 247e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott dwDesiredAccess = GENERIC_READ | GENERIC_WRITE; 248e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott dwCreationDisposition = OPEN_EXISTING; 249e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott break; 250e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott case ios_base::in | ios_base::out | ios_base::trunc: 251e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott dwDesiredAccess = GENERIC_READ | GENERIC_WRITE; 252e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott dwCreationDisposition = OPEN_ALWAYS; 253e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott doTruncate = true; 254e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott break; 255e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott default: // The above are the only combinations of 256e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott return false; // flags allowed by the C++ standard. 257e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott } 258e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 259e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott DWORD dwShareMode = FILE_SHARE_READ | FILE_SHARE_WRITE; 260e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 261e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott#if defined(_STLP_USE_WIDE_INTERFACE) 262e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott file_no = CreateFile (_STLP_PRIV __ASCIIToWide(name).c_str(), 263e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott#else 264e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott file_no = CreateFileA(name, 265e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott#endif 266e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott dwDesiredAccess, dwShareMode, 0, 267e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott dwCreationDisposition, permission, 0); 268e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 269e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott if (file_no == INVALID_STLP_FD) 270e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott return false; 271e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 272e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott if ( 273e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott#if !defined (_STLP_WCE) 274e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott GetFileType(file_no) == FILE_TYPE_DISK && 275e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott#endif 276e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott ((doTruncate && SetEndOfFile(file_no) == 0) || 277e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott (((openmode & ios_base::ate) != 0) && 278e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott (SetFilePointer(file_no, 0, NULL, FILE_END) == INVALID_SET_FILE_POINTER)))) { 279e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott CloseHandle(file_no); 280e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott return false; 281e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott } 282e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 283e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott _M_is_open = true; 284e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott _M_file_id = file_no; 285e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott _M_should_close = _M_is_open; 286e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott _M_openmode = openmode; 287e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 288e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott if (_M_is_open) 289e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott _M_regular_file = _STLP_PRIV __is_regular_file(_M_file_id); 290e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 291e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott return (_M_is_open != 0); 292e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott} 293e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 294e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scottbool _Filebuf_base::_M_open(const char* name, ios_base::openmode openmode) { 295e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott // This doesn't really grant everyone in the world read/write 296e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott // access. On Unix, file-creation system calls always clear 297e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott // bits that are set in the umask from the permissions flag. 298e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott return this->_M_open(name, openmode, FILE_ATTRIBUTE_NORMAL); 299e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott} 300e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 301e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scottbool _Filebuf_base::_M_open(_STLP_fd __id, ios_base::openmode init_mode) { 302e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott#if (defined (_STLP_MSVC_LIB) && !defined (_STLP_WCE)) || \ 303e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott (defined (__MINGW32__) && defined (__MSVCRT__)) || defined (__DMC__) 304e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 305e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott if (_M_is_open || __id == INVALID_STLP_FD) 306e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott return false; 307e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 308e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott if (init_mode != ios_base::__default_mode) 309e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott _M_openmode = init_mode; 310e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott else 311e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott _M_openmode = _get_osfflags(-1, __id); 312e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 313e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott _M_is_open = true; 314e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott _M_file_id = __id; 315e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott _M_should_close = false; 316e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott _M_regular_file = _STLP_PRIV __is_regular_file(_M_file_id); 317e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 318e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott return true; 319e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott#else 320e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott (void)__id; 321e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott (void)init_mode; // dwa 4/27/00 - suppress unused parameter warning 322e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 323e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott // not available for the API 324e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott return false; 325e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 326e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott#endif 327e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott} 328e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 329e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott// Associated the filebuf with a file descriptor pointing to an already- 330e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott// open file. Mode is set to be consistent with the way that the file 331e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott// was opened. 332e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scottbool _Filebuf_base::_M_open(int file_no, ios_base::openmode init_mode) { 333e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott if (_M_is_open || file_no < 0) 334e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott return false; 335e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 336e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott#if (defined (_STLP_MSVC_LIB) && !defined (_STLP_WCE)) || \ 337e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott (defined (__MINGW32__) && defined (__MSVCRT__)) || defined (__DMC__) 338e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 339e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott HANDLE oshandle = (HANDLE)_get_osfhandle(file_no); 340e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott if (oshandle == INVALID_STLP_FD) 341e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott return false; 342e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 343e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott if (init_mode != ios_base::__default_mode) 344e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott _M_openmode = init_mode; 345e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott else 346e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott _M_openmode = _get_osfflags(file_no, oshandle); 347e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 348e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott _M_file_id = oshandle; 349e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott _M_is_open = true; 350e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott _M_should_close = false; 351e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott _M_regular_file = _STLP_PRIV __is_regular_file(_M_file_id); 352e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott return true; 353e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott#else 354e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott _STLP_MARK_PARAMETER_AS_UNUSED(&init_mode) 355e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott // not available for the API 356e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott return false; 357e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott#endif 358e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott} 359e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 360e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scottbool _Filebuf_base::_M_close() { 361e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott if (!_M_is_open) 362e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott return false; 363e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 364e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott bool ok; 365e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 366e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott if (!_M_should_close) 367e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott ok = true; 368e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott else { 369e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott if (_M_file_id != INVALID_STLP_FD) { 370e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott ok = (CloseHandle(_M_file_id) != 0); 371e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott } 372e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott else { 373e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott ok = false; 374e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott } 375e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott } 376e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 377e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott _M_is_open = _M_should_close = false; 378e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott _M_openmode = 0; 379e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott return ok; 380e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott} 381e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 382e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 383e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott#define _STLP_LF 10 384e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott#define _STLP_CR 13 385e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott#define _STLP_CTRLZ 26 386e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 387e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott// Read up to n characters into a buffer. Return value is number of 388e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott// characters read. 389e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scottptrdiff_t _Filebuf_base::_M_read(char* buf, ptrdiff_t n) { 390e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott ptrdiff_t readen = 0; 391e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott //Here cast to size_t is safe as n cannot be negative. 392e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott size_t chunkSize = (min)(size_t(0xffffffff), __STATIC_CAST(size_t, n)); 393e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott // The following, while validating that we are still able to extract chunkSize 394e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott // charaters to the buffer, avoids extraction of too small chunk of datas 395e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott // which would be counter performant. 396e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott while (__STATIC_CAST(size_t, (n - readen)) >= chunkSize) { 397e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott DWORD numberOfBytesRead; 398e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott ReadFile(_M_file_id, buf + readen, __STATIC_CAST(DWORD, chunkSize), &numberOfBytesRead, 0); 399e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 400e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott if (numberOfBytesRead == 0) 401e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott break; 402e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 403e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott if (!(_M_openmode & ios_base::binary)) { 404e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott // translate CR-LFs to LFs in the buffer 405e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott char *to = buf + readen; 406e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott char *from = to; 407e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott char *last = from + numberOfBytesRead - 1; 408e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott for (; from <= last && *from != _STLP_CTRLZ; ++from) { 409e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott if (*from != _STLP_CR) 410e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott *to++ = *from; 411e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott else { // found CR 412e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott if (from < last) { // not at buffer end 413e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott if (*(from + 1) != _STLP_LF) 414e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott *to++ = _STLP_CR; 415e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott } 416e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott else { // last char is CR, peek for LF 417e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott char peek = ' '; 418e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott DWORD NumberOfBytesPeeked; 419e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott ReadFile(_M_file_id, (LPVOID)&peek, 1, &NumberOfBytesPeeked, 0); 420e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott if (NumberOfBytesPeeked != 0) { 421e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott if (peek != _STLP_LF) { //not a <CR><LF> combination 422e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott *to++ = _STLP_CR; 423e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott if ((to < buf + n) && (peek != _STLP_CR)) 424e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott //We have enough place to store peek and it is no a special 425e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott //_STLP_CR character, we can store it. 426e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott *to++ = peek; 427e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott else 428e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott SetFilePointer(_M_file_id, (LONG)-1, 0, FILE_CURRENT); 429e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott } 430e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott else { 431e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott // A <CR><LF> combination, we keep the <LF>: 432e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott *to++ = _STLP_LF; 433e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott } 434e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott } 435e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott else { 436e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott /* This case is tedious, we could 437e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott * - put peek back in the file but this would then generate an infinite loop 438e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott * - report an error as we don't know if in a future call to ReadFile we won't then 439e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott * get a <LF>. Doing so would make all files with a <CR> last an invalid file 440e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott * for STLport, a hard solution for STLport clients. 441e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott * - store the <CR> in the returned buffer, the chosen solution, even if in this 442e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott * case we could miss a <CR><LF> combination. 443e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott */ 444e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott *to++ = _STLP_CR; 445e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott } 446e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott } 447e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott } // found CR 448e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott } // for 449e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott readen = to - buf; 450e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott // seek back to TEXT end of file if hit CTRL-Z 451e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott if (from <= last) { // terminated due to CTRLZ 452e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott SetFilePointer(_M_file_id, -(LONG)((last + 1) - from), 0, FILE_CURRENT); 453e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott break; 454e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott } 455e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott } 456e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott else 457e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott readen += numberOfBytesRead; 458e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott } 459e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott return readen; 460e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott} 461e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 462e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott// Write n characters from a buffer. Return value: true if we managed 463e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott// to write the entire buffer, false if we didn't. 464e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scottbool _Filebuf_base::_M_write(char* buf, ptrdiff_t n) { 465e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott for (;;) { 466e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott ptrdiff_t written; 467e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 468e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott //In the following implementation we are going to cast most of the ptrdiff_t 469e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott //values in size_t to work with coherent unsigned values. Doing so make code 470e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott //more simple especially in the min function call. 471e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 472e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott // In append mode, every write does an implicit seek to the end 473e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott // of the file. 474e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott if (_M_openmode & ios_base::app) 475e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott _M_seek(0, ios_base::end); 476e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 477e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott if (_M_openmode & ios_base::binary) { 478e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott // binary mode 479e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott size_t bytes_to_write = (size_t)n; 480e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott DWORD NumberOfBytesWritten; 481e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott written = 0; 482e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott for (; bytes_to_write != 0;) { 483e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott WriteFile(_M_file_id, buf + written, 484e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott __STATIC_CAST(DWORD, (min)(size_t(0xffffffff), bytes_to_write)), 485e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott &NumberOfBytesWritten, 0); 486e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott if (NumberOfBytesWritten == 0) 487e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott return false; 488e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott bytes_to_write -= NumberOfBytesWritten; 489e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott written += NumberOfBytesWritten; 490e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott } 491e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott } 492e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott else { 493e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott char textbuf[_TEXTBUF_SIZE + 1]; // extra 1 in case LF at end 494e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott char * nextblock = buf, * ptrtextbuf = textbuf; 495e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott char * endtextbuf = textbuf + _TEXTBUF_SIZE; 496e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott char * endblock = buf + n; 497e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott ptrdiff_t nextblocksize = (min) (n, (ptrdiff_t)_TEXTBUF_SIZE); 498e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott char * nextlf; 499e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 500e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott while ( (nextblocksize > 0) && 501e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott (nextlf = (char *)memchr(nextblock, _STLP_LF, nextblocksize)) != 0) { 502e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott ptrdiff_t linelength = nextlf - nextblock; 503e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott memcpy(ptrtextbuf, nextblock, linelength); 504e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott ptrtextbuf += linelength; 505e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott nextblock += (linelength + 1); 506e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott * ptrtextbuf ++ = _STLP_CR; 507e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott * ptrtextbuf ++ = _STLP_LF; 508e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott nextblocksize = (min) (ptrdiff_t(endblock - nextblock), 509e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott (max) (ptrdiff_t(0), ptrdiff_t(endtextbuf - ptrtextbuf))); 510e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott } 511e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott // write out what's left, > condition is here since for LF at the end , 512e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott // endtextbuf may get < ptrtextbuf ... 513e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott if (nextblocksize > 0) { 514e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott memcpy(ptrtextbuf, nextblock, nextblocksize); 515e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott ptrtextbuf += nextblocksize; 516e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott nextblock += nextblocksize; 517e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott } 518e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott // now write out the translated buffer 519e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott char * writetextbuf = textbuf; 520e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott for (size_t NumberOfBytesToWrite = (size_t)(ptrtextbuf - textbuf); 521e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott NumberOfBytesToWrite;) { 522e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott DWORD NumberOfBytesWritten; 523e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott WriteFile((HANDLE)_M_file_id, writetextbuf, 524e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott __STATIC_CAST(DWORD, (min)(size_t(0xffffffff), NumberOfBytesToWrite)), 525e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott &NumberOfBytesWritten, 0); 526e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott if (!NumberOfBytesWritten) // write shortfall 527e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott return false; 528e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott writetextbuf += NumberOfBytesWritten; 529e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott NumberOfBytesToWrite -= NumberOfBytesWritten; 530e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott } 531e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott // count non-translated characters 532e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott written = (nextblock - buf); 533e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott } 534e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 535e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott if (n == written) 536e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott return true; 537e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott else if (written > 0 && written < n) { 538e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott n -= written; 539e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott buf += written; 540e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott } 541e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott else 542e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott return false; 543e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott } 544e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott} 545e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 546e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott// Wrapper for lseek or the like. 547e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scottstreamoff _Filebuf_base::_M_seek(streamoff offset, ios_base::seekdir dir) { 548e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott streamoff result = -1; 549e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott int whence; 550e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 551e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott switch(dir) { 552e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott case ios_base::beg: 553e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott if (offset < 0 /* || offset > _M_file_size() */ ) 554e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott return streamoff(-1); 555e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott whence = FILE_BEGIN; 556e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott break; 557e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott case ios_base::cur: 558e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott whence = FILE_CURRENT; 559e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott break; 560e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott case ios_base::end: 561e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott if (/* offset > 0 || */ -offset > _M_file_size() ) 562e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott return streamoff(-1); 563e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott whence = FILE_END; 564e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott break; 565e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott default: 566e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott return streamoff(-1); 567e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott } 568e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 569e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott LARGE_INTEGER li; 570e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott li.QuadPart = offset; 571e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott li.LowPart = SetFilePointer(_M_file_id, li.LowPart, &li.HighPart, whence); 572e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott if (li.LowPart != INVALID_SET_FILE_POINTER || GetLastError() == NO_ERROR) 573e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott result = li.QuadPart; 574e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 575e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott return result; 576e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott} 577e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 578e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 579e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott// Attempts to memory-map len bytes of the current file, starting 580e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott// at position offset. Precondition: offset is a multiple of the 581e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott// page size. Postcondition: return value is a null pointer if the 582e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott// memory mapping failed. Otherwise the return value is a pointer to 583e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott// the memory-mapped file and the file position is set to offset. 584e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scottvoid* _Filebuf_base::_M_mmap(streamoff offset, streamoff len) { 585e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott void* base; 586e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott _M_view_id = CreateFileMapping(_M_file_id, (PSECURITY_ATTRIBUTES)0 , 587e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott PAGE_READONLY, 0 /* len >> 32 */ , 588e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 0 /* len & 0xFFFFFFFF */ , // low-order DWORD of size 589e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 0); 590e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 591e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott if (_M_view_id) { 592e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott#if 0 593e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott/* 594e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott printf("view %x created from file %x, error = %d, size = %d, map_offset = %d map_len = %d\n", 595e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott _M_view_id, _M_file_id, GetLastError(), 596e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott (int)cur_filesize, ULL(offset) & 0xffffffff, len); 597e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott*/ 598e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott#endif 599e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott LARGE_INTEGER li; 600e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott li.QuadPart = offset; 601e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott base = MapViewOfFile(_M_view_id, FILE_MAP_READ, li.HighPart, li.LowPart, 602e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott#if !defined (__DMC__) 603e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott __STATIC_CAST(SIZE_T, len)); 604e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott#else 605e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott __STATIC_CAST(DWORD, len)); 606e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott#endif 607e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott // check if mapping succeded and is usable 608e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott if (base == 0 || _M_seek(offset + len, ios_base::beg) < 0) { 609e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott this->_M_unmap(base, len); 610e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott base = 0; 611e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott } 612e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott } else 613e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott base = 0; 614e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 615e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott return base; 616e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott} 617e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 618e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scottvoid _Filebuf_base::_M_unmap(void* base, streamoff len) { 619e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott // precondition : there is a valid mapping at the moment 620e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott if (base != NULL) 621e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott UnmapViewOfFile(base); 622e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott // destroy view handle as well 623e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott if (_M_view_id != NULL) 624e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott CloseHandle(_M_view_id); 625e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott _M_view_id = NULL; 626e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott (void)len; //unused variable 627e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott} 628e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott 629e46c9386c4f79aa40185f79a19fc5b2a7ef528b3Patrick Scott_STLP_END_NAMESPACE 630