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Diffstat (limited to 'sal/osl/w32/file.cxx')
| -rw-r--r-- | sal/osl/w32/file.cxx | 1121 |
1 files changed, 1121 insertions, 0 deletions
diff --git a/sal/osl/w32/file.cxx b/sal/osl/w32/file.cxx new file mode 100644 index 000000000..be921aede --- /dev/null +++ b/sal/osl/w32/file.cxx @@ -0,0 +1,1121 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ + +#include <systools/win32/uwinapi.h> + +#include <osl/file.hxx> +#include <rtl/alloc.h> +#include <rtl/byteseq.h> +#include <sal/log.hxx> +#include <o3tl/char16_t2wchar_t.hxx> +#include <o3tl/typed_flags_set.hxx> + +#include "file-impl.hxx" +#include "file_url.hxx" +#include "file_error.hxx" + +#include <atomic> +#include <cassert> +#include <algorithm> +#include <limits> + +#ifdef max /* conflict w/ std::numeric_limits<T>::max() */ +#undef max +#endif +#ifdef min +#undef min +#endif + +namespace { + +/** State + */ +enum class StateBits +{ + Seekable = 1, /*< open() sets, iff regular file */ + Readable = 2, /*< open() sets, read() requires */ + Writeable = 4, /*< open() sets, write() requires */ + Modified = 8 /* write() sets, flush() resets */ +}; + +} + +template<> struct o3tl::typed_flags<StateBits>: o3tl::is_typed_flags<StateBits, 0xF> {}; + +namespace { + +/** File handle implementation. +*/ +struct FileHandle_Impl +{ + CRITICAL_SECTION m_mutex; + HANDLE m_hFile; + + StateBits m_state; + + sal_uInt64 m_size; /*< file size */ + LONGLONG m_offset; /*< physical offset from begin of file */ + // m_filepos is hit hard in some situations, where the overhead of a mutex starts to show up, so use an atomic + std::atomic<LONGLONG> m_filepos; /*< logical offset from begin of file */ + + LONGLONG m_bufptr; /*< buffer offset from begin of file */ + SIZE_T m_buflen; /*< buffer filled [0, m_bufsiz - 1] */ + + SIZE_T m_bufsiz; + sal_uInt8 * m_buffer; + + explicit FileHandle_Impl (HANDLE hFile); + ~FileHandle_Impl(); + + static SIZE_T getpagesize(); + + sal_uInt64 getPos() const; + oslFileError setPos (sal_uInt64 uPos); + + sal_uInt64 getSize() const; + oslFileError setSize (sal_uInt64 uPos); + + oslFileError readAt( + LONGLONG nOffset, + void * pBuffer, + DWORD nBytesRequested, + sal_uInt64 * pBytesRead); + + oslFileError writeAt( + LONGLONG nOffset, + void const * pBuffer, + DWORD nBytesToWrite, + sal_uInt64 * pBytesWritten); + + oslFileError readFileAt( + LONGLONG nOffset, + void * pBuffer, + sal_uInt64 uBytesRequested, + sal_uInt64 * pBytesRead); + + oslFileError writeFileAt( + LONGLONG nOffset, + void const * pBuffer, + sal_uInt64 uBytesToWrite, + sal_uInt64 * pBytesWritten); + + oslFileError readLineAt( + LONGLONG nOffset, + sal_Sequence ** ppSequence, + sal_uInt64 * pBytesRead); + + static oslFileError writeSequence_Impl ( + sal_Sequence ** ppSequence, + SIZE_T * pnOffset, + const void * pBuffer, + SIZE_T nBytes); + + oslFileError syncFile(); + + /** Guard. + */ + class Guard + { + LPCRITICAL_SECTION m_mutex; + + public: + explicit Guard(LPCRITICAL_SECTION pMutex); + ~Guard(); + }; +}; + +} + +FileHandle_Impl::Guard::Guard(LPCRITICAL_SECTION pMutex) + : m_mutex (pMutex) +{ + assert(pMutex); + ::EnterCriticalSection (m_mutex); +} + +FileHandle_Impl::Guard::~Guard() +{ + ::LeaveCriticalSection (m_mutex); +} + +FileHandle_Impl::FileHandle_Impl(HANDLE hFile) + : m_hFile (hFile), + m_state (StateBits::Readable | StateBits::Writeable), + m_size (0), + m_offset (0), + m_filepos (0), + m_bufptr (-1), + m_buflen (0), + m_bufsiz (getpagesize()), + m_buffer (nullptr) +{ + ::InitializeCriticalSection (&m_mutex); + m_buffer = static_cast<sal_uInt8 *>(calloc(m_bufsiz, 1)); +} + +FileHandle_Impl::~FileHandle_Impl() +{ + free(m_buffer); + m_buffer = nullptr; + ::DeleteCriticalSection (&m_mutex); +} + +SIZE_T FileHandle_Impl::getpagesize() +{ + SYSTEM_INFO info; + ::GetSystemInfo(&info); + return sal::static_int_cast< SIZE_T >(info.dwPageSize); +} + +sal_uInt64 FileHandle_Impl::getPos() const +{ + return sal::static_int_cast< sal_uInt64 >(m_filepos.load()); +} + +oslFileError FileHandle_Impl::setPos(sal_uInt64 uPos) +{ + m_filepos = sal::static_int_cast< LONGLONG >(uPos); + return osl_File_E_None; +} + +sal_uInt64 FileHandle_Impl::getSize() const +{ + LONGLONG bufend = std::max(LONGLONG(0), m_bufptr) + m_buflen; + return std::max(m_size, sal::static_int_cast< sal_uInt64 >(bufend)); +} + +oslFileError FileHandle_Impl::setSize(sal_uInt64 uSize) +{ + LARGE_INTEGER nDstPos; nDstPos.QuadPart = sal::static_int_cast< LONGLONG >(uSize); + if (!::SetFilePointerEx(m_hFile, nDstPos, nullptr, FILE_BEGIN)) + return oslTranslateFileError(GetLastError()); + + if (!::SetEndOfFile(m_hFile)) + return oslTranslateFileError(GetLastError()); + m_size = uSize; + + nDstPos.QuadPart = m_offset; + if (!::SetFilePointerEx(m_hFile, nDstPos, nullptr, FILE_BEGIN)) + return oslTranslateFileError(GetLastError()); + + return osl_File_E_None; +} + +oslFileError FileHandle_Impl::readAt( + LONGLONG nOffset, + void * pBuffer, + DWORD nBytesRequested, + sal_uInt64 * pBytesRead) +{ + SAL_WARN_IF(!(m_state & StateBits::Seekable), "sal.osl", "FileHandle_Impl::readAt(): not seekable"); + if (!(m_state & StateBits::Seekable)) + return osl_File_E_SPIPE; + + SAL_WARN_IF(!(m_state & StateBits::Readable), "sal.osl", "FileHandle_Impl::readAt(): not readable"); + if (!(m_state & StateBits::Readable)) + return osl_File_E_BADF; + + if (nOffset != m_offset) + { + LARGE_INTEGER liOffset; liOffset.QuadPart = nOffset; + if (!::SetFilePointerEx(m_hFile, liOffset, nullptr, FILE_BEGIN)) + return oslTranslateFileError(GetLastError()); + m_offset = nOffset; + } + + DWORD dwDone = 0; + if (!::ReadFile(m_hFile, pBuffer, nBytesRequested, &dwDone, nullptr)) + return oslTranslateFileError(GetLastError()); + m_offset += dwDone; + + *pBytesRead = dwDone; + return osl_File_E_None; +} + +oslFileError FileHandle_Impl::writeAt( + LONGLONG nOffset, + void const * pBuffer, + DWORD nBytesToWrite, + sal_uInt64 * pBytesWritten) +{ + SAL_WARN_IF(!(m_state & StateBits::Seekable), "sal.osl", "FileHandle_Impl::writeAt(): not seekable"); + if (!(m_state & StateBits::Seekable)) + return osl_File_E_SPIPE; + + SAL_WARN_IF(!(m_state & StateBits::Writeable), "sal.osl", "FileHandle_Impl::writeAt(): not writeable"); + if (!(m_state & StateBits::Writeable)) + return osl_File_E_BADF; + + if (nOffset != m_offset) + { + LARGE_INTEGER liOffset; liOffset.QuadPart = nOffset; + if (!::SetFilePointerEx (m_hFile, liOffset, nullptr, FILE_BEGIN)) + return oslTranslateFileError(GetLastError()); + m_offset = nOffset; + } + + DWORD dwDone = 0; + if (!::WriteFile(m_hFile, pBuffer, nBytesToWrite, &dwDone, nullptr)) + return oslTranslateFileError(GetLastError()); + m_offset += dwDone; + + m_size = std::max(m_size, sal::static_int_cast< sal_uInt64 >(m_offset)); + + *pBytesWritten = dwDone; + return osl_File_E_None; +} + +oslFileError FileHandle_Impl::readFileAt( + LONGLONG nOffset, + void * pBuffer, + sal_uInt64 uBytesRequested, + sal_uInt64 * pBytesRead) +{ + static sal_uInt64 const g_limit_dword = std::numeric_limits< DWORD >::max(); + if (g_limit_dword < uBytesRequested) + return osl_File_E_OVERFLOW; + DWORD nBytesRequested = sal::static_int_cast< DWORD >(uBytesRequested); + + if (!(m_state & StateBits::Seekable)) + { + // not seekable (pipe) + DWORD dwDone = 0; + if (!::ReadFile(m_hFile, pBuffer, nBytesRequested, &dwDone, nullptr)) + return oslTranslateFileError(GetLastError()); + *pBytesRead = dwDone; + return osl_File_E_None; + } + else if (!m_buffer) + { + // not buffered + return readAt (nOffset, pBuffer, nBytesRequested, pBytesRead); + } + else + { + sal_uInt8 * buffer = static_cast< sal_uInt8* >(pBuffer); + for (*pBytesRead = 0; nBytesRequested > 0;) + { + LONGLONG const bufptr = (nOffset / m_bufsiz) * m_bufsiz; + SIZE_T const bufpos = nOffset % m_bufsiz; + + if (bufptr != m_bufptr) + { + // flush current buffer + oslFileError result = syncFile(); + if (result != osl_File_E_None) + return result; + m_bufptr = -1; + m_buflen = 0; + + if (nBytesRequested >= m_bufsiz) + { + // buffer too small, read through from file + sal_uInt64 uDone = 0; + result = readAt (nOffset, &(buffer[*pBytesRead]), nBytesRequested, &uDone); + if (result != osl_File_E_None) + return result; + + nBytesRequested -= sal::static_int_cast< DWORD >(uDone); + *pBytesRead += uDone; + return osl_File_E_None; + } + + // update buffer (pointer) + sal_uInt64 uDone = 0; + result = readAt(bufptr, m_buffer, m_bufsiz, &uDone); + if (result != osl_File_E_None) + return result; + m_bufptr = bufptr; + m_buflen = sal::static_int_cast< SIZE_T >(uDone); + } + if (bufpos >= m_buflen) + { + // end of file + return osl_File_E_None; + } + + SIZE_T const bytes = std::min(m_buflen - bufpos, static_cast<SIZE_T>(nBytesRequested)); + memcpy(&(buffer[*pBytesRead]), &(m_buffer[bufpos]), bytes); + nBytesRequested -= bytes; + *pBytesRead += bytes; + nOffset += bytes; + } + return osl_File_E_None; + } +} + +oslFileError FileHandle_Impl::writeFileAt( + LONGLONG nOffset, + void const * pBuffer, + sal_uInt64 uBytesToWrite, + sal_uInt64 * pBytesWritten) +{ + static sal_uInt64 const g_limit_dword = std::numeric_limits< DWORD >::max(); + if (g_limit_dword < uBytesToWrite) + return osl_File_E_OVERFLOW; + DWORD nBytesToWrite = sal::static_int_cast< DWORD >(uBytesToWrite); + + if (!(m_state & StateBits::Seekable)) + { + // not seekable (pipe) + DWORD dwDone = 0; + if (!::WriteFile(m_hFile, pBuffer, nBytesToWrite, &dwDone, nullptr)) + return oslTranslateFileError(GetLastError()); + *pBytesWritten = dwDone; + return osl_File_E_None; + } + else if (!m_buffer) + { + // not buffered + return writeAt(nOffset, pBuffer, nBytesToWrite, pBytesWritten); + } + else + { + sal_uInt8 const * buffer = static_cast< sal_uInt8 const* >(pBuffer); + for (*pBytesWritten = 0; nBytesToWrite > 0;) + { + LONGLONG const bufptr = (nOffset / m_bufsiz) * m_bufsiz; + SIZE_T const bufpos = nOffset % m_bufsiz; + if (bufptr != m_bufptr) + { + // flush current buffer + oslFileError result = syncFile(); + if (result != osl_File_E_None) + return result; + m_bufptr = -1; + m_buflen = 0; + + if (nBytesToWrite >= m_bufsiz) + { + // buffer too small, write through to file + sal_uInt64 uDone = 0; + result = writeAt(nOffset, &(buffer[*pBytesWritten]), nBytesToWrite, &uDone); + if (result != osl_File_E_None) + return result; + if (uDone != nBytesToWrite) + return osl_File_E_IO; + + nBytesToWrite -= sal::static_int_cast< DWORD >(uDone); + *pBytesWritten += uDone; + return osl_File_E_None; + } + + // update buffer (pointer) + sal_uInt64 uDone = 0; + result = readAt(bufptr, m_buffer, m_bufsiz, &uDone); + if (result != osl_File_E_None) + return result; + m_bufptr = bufptr; + m_buflen = sal::static_int_cast< SIZE_T >(uDone); + } + + SIZE_T const bytes = std::min(m_bufsiz - bufpos, static_cast<SIZE_T>(nBytesToWrite)); + memcpy(&(m_buffer[bufpos]), &(buffer[*pBytesWritten]), bytes); + nBytesToWrite -= bytes; + *pBytesWritten += bytes; + nOffset += bytes; + + m_buflen = std::max(m_buflen, bufpos + bytes); + m_state |= StateBits::Modified; + } + return osl_File_E_None; + } +} + +oslFileError FileHandle_Impl::readLineAt( + LONGLONG nOffset, + sal_Sequence ** ppSequence, + sal_uInt64 * pBytesRead) +{ + oslFileError result = osl_File_E_None; + + LONGLONG bufptr = (nOffset / m_bufsiz) * m_bufsiz; + if (bufptr != m_bufptr) + { + /* flush current buffer */ + result = syncFile(); + if (result != osl_File_E_None) + return result; + + /* update buffer (pointer) */ + sal_uInt64 uDone = 0; + result = readAt(bufptr, m_buffer, m_bufsiz, &uDone); + if (result != osl_File_E_None) + return result; + + m_bufptr = bufptr; + m_buflen = sal::static_int_cast< SIZE_T >(uDone); + } + + static int const LINE_STATE_BEGIN = 0; + static int const LINE_STATE_CR = 1; + static int const LINE_STATE_LF = 2; + + SIZE_T bufpos = sal::static_int_cast< SIZE_T >(nOffset - m_bufptr), curpos = bufpos, dstpos = 0; + int state = (bufpos >= m_buflen) ? LINE_STATE_LF : LINE_STATE_BEGIN; + + for (; state != LINE_STATE_LF;) + { + if (curpos >= m_buflen) + { + /* buffer examined */ + if (curpos > bufpos) // actually, curpos can't become less than bufpos, so != could do + { + /* flush buffer to sequence */ + result = writeSequence_Impl( + ppSequence, &dstpos, &(m_buffer[bufpos]), curpos - bufpos); + if (result != osl_File_E_None) + return result; + *pBytesRead += curpos - bufpos; + nOffset += curpos - bufpos; + } + + bufptr = nOffset / m_bufsiz * m_bufsiz; + if (bufptr != m_bufptr) + { + /* update buffer (pointer) */ + sal_uInt64 uDone = 0; + result = readAt(bufptr, m_buffer, m_bufsiz, &uDone); + if (result != osl_File_E_None) + return result; + m_bufptr = bufptr; + m_buflen = sal::static_int_cast< SIZE_T >(uDone); + } + + bufpos = sal::static_int_cast< SIZE_T >(nOffset - m_bufptr); + curpos = bufpos; + if (bufpos >= m_buflen) + break; + } + switch (state) + { + case LINE_STATE_CR: + state = LINE_STATE_LF; + switch (m_buffer[curpos]) + { + case 0x0A: /* CRLF */ + /* eat current char */ + curpos++; + break; + default: /* single CR */ + /* keep current char */ + break; + } + break; + default: + /* determine next state */ + switch (m_buffer[curpos]) + { + case 0x0A: /* single LF */ + state = LINE_STATE_LF; + break; + case 0x0D: /* CR */ + state = LINE_STATE_CR; + break; + default: /* advance to next char */ + curpos++; + break; + } + if (state != LINE_STATE_BEGIN) + { + /* store (and eat) the newline char */ + m_buffer[curpos] = 0x0A; + curpos++; + + /* flush buffer to sequence */ + result = writeSequence_Impl( + ppSequence, &dstpos, &(m_buffer[bufpos]), curpos - bufpos - 1); + if (result != osl_File_E_None) + return result; + *pBytesRead += curpos - bufpos; + nOffset += curpos - bufpos; + } + break; + } + } + + result = writeSequence_Impl(ppSequence, &dstpos, nullptr, 0); + if (result != osl_File_E_None) + return result; + if (dstpos > 0) + return osl_File_E_None; + if (bufpos >= m_buflen) + return osl_File_E_AGAIN; + return osl_File_E_None; +} + +oslFileError FileHandle_Impl::writeSequence_Impl( + sal_Sequence ** ppSequence, + SIZE_T * pnOffset, + const void * pBuffer, + SIZE_T nBytes) +{ + sal_Int32 nElements = *pnOffset + nBytes; + if (!*ppSequence) + { + /* construct sequence */ + rtl_byte_sequence_constructNoDefault(ppSequence, nElements); + } + else if (nElements != (*ppSequence)->nElements) + { + /* resize sequence */ + rtl_byte_sequence_realloc(ppSequence, nElements); + } + if (*ppSequence) + { + /* fill sequence */ + memcpy(&((*ppSequence)->elements[*pnOffset]), pBuffer, nBytes); + *pnOffset += nBytes; + } + return (*ppSequence) ? osl_File_E_None : osl_File_E_NOMEM; +} + +oslFileError FileHandle_Impl::syncFile() +{ + oslFileError result = osl_File_E_None; + if (m_state & StateBits::Modified) + { + sal_uInt64 uDone = 0; + result = writeAt(m_bufptr, m_buffer, m_buflen, &uDone); + if (result != osl_File_E_None) + return result; + if (uDone != m_buflen) + return osl_File_E_IO; + m_state &= ~StateBits::Modified; + } + return result; +} + +extern "C" oslFileHandle osl_createFileHandleFromOSHandle( + HANDLE hFile, + sal_uInt32 uFlags) +{ + if (!IsValidHandle(hFile)) + return nullptr; // EINVAL + + FileHandle_Impl * pImpl = new FileHandle_Impl(hFile); + + /* check for regular file */ + if (GetFileType(hFile) == FILE_TYPE_DISK) + { + /* mark seekable */ + pImpl->m_state |= StateBits::Seekable; + + /* init current size */ + LARGE_INTEGER uSize = { { 0, 0 } }; + (void) ::GetFileSizeEx(hFile, &uSize); + pImpl->m_size = (sal::static_int_cast<sal_uInt64>(uSize.HighPart) << 32) + uSize.LowPart; + } + + if (!(uFlags & osl_File_OpenFlag_Read)) + pImpl->m_state &= ~StateBits::Readable; + if (!(uFlags & osl_File_OpenFlag_Write)) + pImpl->m_state &= ~StateBits::Writeable; + + SAL_WARN_IF( + !((uFlags & osl_File_OpenFlag_Read) || (uFlags & osl_File_OpenFlag_Write)), + "sal.osl", + "osl_createFileHandleFromOSHandle(): missing read/write access flags"); + return static_cast<oslFileHandle>(pImpl); +} + +oslFileError SAL_CALL osl_openFile( + rtl_uString * strPath, + oslFileHandle * pHandle, + sal_uInt32 uFlags) +{ + OUString strSysPath; + oslFileError result = osl_getSystemPathFromFileURL_(OUString::unacquired(&strPath), &strSysPath.pData, false); + if (result != osl_File_E_None) + return result; + + // tdf126742 use FILE_SHARE_WRITE to get closer to non-Windows platform behaviour, + // for details and discussion see task please + DWORD dwAccess = GENERIC_READ, dwShare = FILE_SHARE_READ | FILE_SHARE_WRITE, dwCreation = 0; + + if (uFlags & osl_File_OpenFlag_Write) + dwAccess |= GENERIC_WRITE; + + if (uFlags & osl_File_OpenFlag_NoLock) + dwShare |= FILE_SHARE_DELETE; + + if (uFlags & osl_File_OpenFlag_Create) + dwCreation |= CREATE_NEW; + else + dwCreation |= OPEN_EXISTING; + + HANDLE hFile = CreateFileW( + o3tl::toW(strSysPath.getStr()), + dwAccess, dwShare, nullptr, dwCreation, 0, nullptr); + + // @@@ ERROR HANDLING @@@ + if (!IsValidHandle(hFile)) + result = oslTranslateFileError(GetLastError()); + + *pHandle = osl_createFileHandleFromOSHandle(hFile, uFlags | osl_File_OpenFlag_Read); + + return result; +} + +oslFileError SAL_CALL osl_syncFile(oslFileHandle Handle) +{ + FileHandle_Impl * pImpl = static_cast<FileHandle_Impl*>(Handle); + if ((!pImpl) || !IsValidHandle(pImpl->m_hFile)) + return osl_File_E_INVAL; + + FileHandle_Impl::Guard lock(&(pImpl->m_mutex)); + + oslFileError result = pImpl->syncFile(); + if (result != osl_File_E_None) + return result; + + if (!FlushFileBuffers(pImpl->m_hFile)) + return oslTranslateFileError(GetLastError()); + + return osl_File_E_None; +} + +oslFileError SAL_CALL osl_closeFile(oslFileHandle Handle) +{ + FileHandle_Impl * pImpl = static_cast<FileHandle_Impl*>(Handle); + if ((!pImpl) || !IsValidHandle(pImpl->m_hFile)) + return osl_File_E_INVAL; + + ::EnterCriticalSection(&(pImpl->m_mutex)); + + oslFileError result = pImpl->syncFile(); + if (result != osl_File_E_None) + { + /* ignore double failure */ + (void)::CloseHandle(pImpl->m_hFile); + } + else if (!::CloseHandle(pImpl->m_hFile)) + { + /* translate error code */ + result = oslTranslateFileError(GetLastError()); + } + + ::LeaveCriticalSection(&(pImpl->m_mutex)); + delete pImpl; + return result; +} + +namespace { + +// coverity[result_independent_of_operands] - crossplatform requirement +template<typename T> bool exceedsMaxSIZE_T(T n) +{ return n > std::numeric_limits< SIZE_T >::max(); } + +} + +oslFileError SAL_CALL osl_mapFile( + oslFileHandle Handle, + void** ppAddr, + sal_uInt64 uLength, + sal_uInt64 uOffset, + sal_uInt32 uFlags) +{ + struct FileMapping + { + HANDLE m_handle; + + explicit FileMapping(HANDLE hMap) + : m_handle(hMap) + {} + + ~FileMapping() + { + (void)::CloseHandle(m_handle); + } + }; + + FileHandle_Impl * pImpl = static_cast<FileHandle_Impl*>(Handle); + if ((!pImpl) || !IsValidHandle(pImpl->m_hFile) || (!ppAddr)) + return osl_File_E_INVAL; + *ppAddr = nullptr; + + if (exceedsMaxSIZE_T(uLength)) + return osl_File_E_OVERFLOW; + SIZE_T const nLength = sal::static_int_cast< SIZE_T >(uLength); + + FileMapping aMap(::CreateFileMappingW(pImpl->m_hFile, nullptr, SEC_COMMIT | PAGE_READONLY, 0, 0, nullptr)); + if (!IsValidHandle(aMap.m_handle)) + return oslTranslateFileError(GetLastError()); + + DWORD const dwOffsetHi = sal::static_int_cast<DWORD>(uOffset >> 32); + DWORD const dwOffsetLo = sal::static_int_cast<DWORD>(uOffset & 0xFFFFFFFF); + + *ppAddr = ::MapViewOfFile(aMap.m_handle, FILE_MAP_READ, dwOffsetHi, dwOffsetLo, nLength); + if (!*ppAddr) + return oslTranslateFileError(GetLastError()); + + if (uFlags & osl_File_MapFlag_RandomAccess) + { + // Determine memory pagesize. + SYSTEM_INFO info; + ::GetSystemInfo(&info); + DWORD const dwPageSize = info.dwPageSize; + + /* + * Pagein, touching first byte of each memory page. + * Note: volatile disables optimizing the loop away. + */ + BYTE volatile * pData(static_cast<BYTE*>(*ppAddr)); + SIZE_T nSize(nLength); + + while (nSize > dwPageSize) + { + pData[0]; + pData += dwPageSize; + nSize -= dwPageSize; + } + if (nSize > 0) + { + pData[0]; + } + } + return osl_File_E_None; +} + +oslFileError SAL_CALL osl_unmapFile(void* pAddr, sal_uInt64 /* uLength */) +{ + if (!pAddr) + return osl_File_E_INVAL; + + if (!::UnmapViewOfFile(pAddr)) + return oslTranslateFileError(GetLastError()); + + return osl_File_E_None; +} + +oslFileError SAL_CALL osl_unmapMappedFile(oslFileHandle /* Handle */, void* pAddr, sal_uInt64 uLength) +{ + return osl_unmapFile(pAddr, uLength); +} + +oslFileError +SAL_CALL osl_readLine( + oslFileHandle Handle, + sal_Sequence ** ppSequence) +{ + FileHandle_Impl * pImpl = static_cast<FileHandle_Impl*>(Handle); + if ((!pImpl) || !IsValidHandle(pImpl->m_hFile) || (!ppSequence)) + return osl_File_E_INVAL; + sal_uInt64 uBytesRead = 0; + + // read at current filepos; filepos += uBytesRead; + FileHandle_Impl::Guard lock(&(pImpl->m_mutex)); + oslFileError result = pImpl->readLineAt( + pImpl->m_filepos, ppSequence, &uBytesRead); + if (result == osl_File_E_None) + pImpl->m_filepos += uBytesRead; + return result; +} + +oslFileError SAL_CALL osl_readFile( + oslFileHandle Handle, + void * pBuffer, + sal_uInt64 uBytesRequested, + sal_uInt64 * pBytesRead) +{ + FileHandle_Impl * pImpl = static_cast<FileHandle_Impl*>(Handle); + if ((!pImpl) || !IsValidHandle(pImpl->m_hFile) || (!pBuffer) || (!pBytesRead)) + return osl_File_E_INVAL; + + // read at current filepos; filepos += *pBytesRead; + FileHandle_Impl::Guard lock(&(pImpl->m_mutex)); + oslFileError result = pImpl->readFileAt( + pImpl->m_filepos, pBuffer, uBytesRequested, pBytesRead); + if (result == osl_File_E_None) + pImpl->m_filepos += *pBytesRead; + return result; +} + +oslFileError SAL_CALL osl_writeFile( + oslFileHandle Handle, + const void * pBuffer, + sal_uInt64 uBytesToWrite, + sal_uInt64 * pBytesWritten) +{ + FileHandle_Impl * pImpl = static_cast<FileHandle_Impl*>(Handle); + + if ((!pImpl) || !IsValidHandle(pImpl->m_hFile) || (!pBuffer) || (!pBytesWritten)) + return osl_File_E_INVAL; + + // write at current filepos; filepos += *pBytesWritten; + FileHandle_Impl::Guard lock(&(pImpl->m_mutex)); + oslFileError result = pImpl->writeFileAt( + pImpl->m_filepos, pBuffer, uBytesToWrite, pBytesWritten); + if (result == osl_File_E_None) + pImpl->m_filepos += *pBytesWritten; + return result; +} + +LONGLONG const g_limit_longlong = std::numeric_limits< LONGLONG >::max(); + +namespace { + +// coverity[result_independent_of_operands] - crossplatform requirement +template<typename T> bool exceedsMaxLONGLONG(T n) +{ return n > g_limit_longlong; } + +template<typename T> bool exceedsMinLONGLONG(T n) +{ return n < std::numeric_limits<LONGLONG>::min(); } + +} + +oslFileError SAL_CALL osl_readFileAt( + oslFileHandle Handle, + sal_uInt64 uOffset, + void* pBuffer, + sal_uInt64 uBytesRequested, + sal_uInt64* pBytesRead) +{ + FileHandle_Impl * pImpl = static_cast<FileHandle_Impl*>(Handle); + + if ((!pImpl) || !IsValidHandle(pImpl->m_hFile) || (!pBuffer) || (!pBytesRead)) + return osl_File_E_INVAL; + if (!(pImpl->m_state & StateBits::Seekable)) + return osl_File_E_SPIPE; + + if (exceedsMaxLONGLONG(uOffset)) + return osl_File_E_OVERFLOW; + LONGLONG const nOffset = sal::static_int_cast< LONGLONG >(uOffset); + + // read at specified fileptr + FileHandle_Impl::Guard lock (&(pImpl->m_mutex)); + return pImpl->readFileAt(nOffset, pBuffer, uBytesRequested, pBytesRead); +} + +oslFileError SAL_CALL osl_writeFileAt( + oslFileHandle Handle, + sal_uInt64 uOffset, + const void* pBuffer, + sal_uInt64 uBytesToWrite, + sal_uInt64* pBytesWritten) +{ + FileHandle_Impl * pImpl = static_cast<FileHandle_Impl*>(Handle); + + if ((!pImpl) || !IsValidHandle(pImpl->m_hFile) || (!pBuffer) || (!pBytesWritten)) + return osl_File_E_INVAL; + if (!(pImpl->m_state & StateBits::Seekable)) + return osl_File_E_SPIPE; + + if (exceedsMaxLONGLONG(uOffset)) + return osl_File_E_OVERFLOW; + LONGLONG const nOffset = sal::static_int_cast< LONGLONG >(uOffset); + + // write at specified fileptr + FileHandle_Impl::Guard lock(&(pImpl->m_mutex)); + return pImpl->writeFileAt(nOffset, pBuffer, uBytesToWrite, pBytesWritten); +} + +oslFileError SAL_CALL osl_isEndOfFile(oslFileHandle Handle, sal_Bool *pIsEOF) +{ + FileHandle_Impl * pImpl = static_cast<FileHandle_Impl*>(Handle); + + if ((!pImpl) || !IsValidHandle(pImpl->m_hFile) || (!pIsEOF)) + return osl_File_E_INVAL; + + FileHandle_Impl::Guard lock(&(pImpl->m_mutex)); + *pIsEOF = (pImpl->getPos() == pImpl->getSize()); + return osl_File_E_None; +} + +oslFileError SAL_CALL osl_getFilePos(oslFileHandle Handle, sal_uInt64 *pPos) +{ + FileHandle_Impl * pImpl = static_cast<FileHandle_Impl*>(Handle); + if ((!pImpl) || !IsValidHandle(pImpl->m_hFile) || (!pPos)) + return osl_File_E_INVAL; + + // no need to lock because pos is atomic + *pPos = pImpl->getPos(); + + return osl_File_E_None; +} + +oslFileError SAL_CALL osl_setFilePos(oslFileHandle Handle, sal_uInt32 uHow, sal_Int64 uOffset) +{ + FileHandle_Impl * pImpl = static_cast<FileHandle_Impl*>(Handle); + if ((!pImpl) || !IsValidHandle(pImpl->m_hFile)) + return osl_File_E_INVAL; + + if (exceedsMaxLONGLONG(uOffset) || exceedsMinLONGLONG(uOffset)) + return osl_File_E_OVERFLOW; + LONGLONG nPos = 0, nOffset = sal::static_int_cast< LONGLONG >(uOffset); + + FileHandle_Impl::Guard lock(&(pImpl->m_mutex)); + switch (uHow) + { + case osl_Pos_Absolut: + if (nOffset < 0) + return osl_File_E_INVAL; + break; + + case osl_Pos_Current: + nPos = sal::static_int_cast< LONGLONG >(pImpl->getPos()); + if ((nOffset < 0) && (nPos < -1*nOffset)) + return osl_File_E_INVAL; + assert(nPos >= 0); + if (nOffset > g_limit_longlong - nPos) + return osl_File_E_OVERFLOW; + break; + + case osl_Pos_End: + nPos = sal::static_int_cast< LONGLONG >(pImpl->getSize()); + if ((nOffset < 0) && (nPos < -1*nOffset)) + return osl_File_E_INVAL; + assert(nPos >= 0); + if (nOffset > g_limit_longlong - nPos) + return osl_File_E_OVERFLOW; + break; + + default: + return osl_File_E_INVAL; + } + + return pImpl->setPos(nPos + nOffset); +} + +oslFileError SAL_CALL osl_getFileSize(oslFileHandle Handle, sal_uInt64 *pSize) +{ + FileHandle_Impl * pImpl = static_cast<FileHandle_Impl*>(Handle); + + if ((!pImpl) || !IsValidHandle(pImpl->m_hFile) || (!pSize)) + return osl_File_E_INVAL; + + FileHandle_Impl::Guard lock(&(pImpl->m_mutex)); + *pSize = pImpl->getSize(); + return osl_File_E_None; +} + +oslFileError SAL_CALL osl_setFileSize(oslFileHandle Handle, sal_uInt64 uSize) +{ + FileHandle_Impl * pImpl = static_cast<FileHandle_Impl*>(Handle); + + if ((!pImpl) || !IsValidHandle(pImpl->m_hFile)) + return osl_File_E_INVAL; + if (!(pImpl->m_state & StateBits::Writeable)) + return osl_File_E_BADF; + + if (exceedsMaxLONGLONG(uSize)) + return osl_File_E_OVERFLOW; + + FileHandle_Impl::Guard lock(&(pImpl->m_mutex)); + oslFileError result = pImpl->syncFile(); + if (result != osl_File_E_None) + return result; + pImpl->m_bufptr = -1; + pImpl->m_buflen = 0; + + return pImpl->setSize(uSize); +} + +oslFileError SAL_CALL osl_removeFile(rtl_uString* strPath) +{ + OUString strSysPath; + oslFileError error = osl_getSystemPathFromFileURL_(OUString::unacquired(&strPath), &strSysPath.pData, false); + + if (error == osl_File_E_None) + { + if (DeleteFileW(o3tl::toW(strSysPath.getStr()))) + error = osl_File_E_None; + else + error = oslTranslateFileError(GetLastError()); + } + return error; +} + +oslFileError SAL_CALL osl_copyFile(rtl_uString* strPath, rtl_uString *strDestPath) +{ + OUString strSysPath, strSysDestPath; + oslFileError error = osl_getSystemPathFromFileURL_(OUString::unacquired(&strPath), &strSysPath.pData, false); + + if (error == osl_File_E_None) + error = osl_getSystemPathFromFileURL_(OUString::unacquired(&strDestPath), &strSysDestPath.pData, false); + + if (error == osl_File_E_None) + { + LPCWSTR src = o3tl::toW(strSysPath.getStr()); + LPCWSTR dst = o3tl::toW(strSysDestPath.getStr()); + + if (CopyFileW(src, dst, FALSE)) + error = osl_File_E_None; + else + error = oslTranslateFileError(GetLastError()); + } + + return error; +} + +oslFileError SAL_CALL osl_moveFile(rtl_uString* strPath, rtl_uString *strDestPath) +{ + OUString strSysPath, strSysDestPath; + oslFileError error = osl_getSystemPathFromFileURL_(OUString::unacquired(&strPath), &strSysPath.pData, false); + + if (error == osl_File_E_None) + error = osl_getSystemPathFromFileURL_(OUString::unacquired(&strDestPath), &strSysDestPath.pData, false); + + if (error == osl_File_E_None) + { + LPCWSTR src = o3tl::toW(strSysPath.getStr()); + LPCWSTR dst = o3tl::toW(strSysDestPath.getStr()); + + if (MoveFileExW(src, dst, MOVEFILE_COPY_ALLOWED | MOVEFILE_WRITE_THROUGH | MOVEFILE_REPLACE_EXISTING)) + error = osl_File_E_None; + else + error = oslTranslateFileError(GetLastError()); + } + + return error; +} + +oslFileError SAL_CALL osl_replaceFile(rtl_uString* strPath, rtl_uString* strDestPath) +{ + OUString strSysPath, strSysDestPath; + oslFileError error = osl_getSystemPathFromFileURL_(OUString::unacquired(&strPath), &strSysPath.pData, false); + + if (error == osl_File_E_None) + error = osl_getSystemPathFromFileURL_(OUString::unacquired(&strDestPath), &strSysDestPath.pData, false); + + if (error == osl_File_E_None) + { + LPCWSTR src = o3tl::toW(strSysPath.getStr()); + LPCWSTR dst = o3tl::toW(strSysDestPath.getStr()); + + if (!ReplaceFileW(dst, src, nullptr, + REPLACEFILE_WRITE_THROUGH | REPLACEFILE_IGNORE_MERGE_ERRORS + | REPLACEFILE_IGNORE_ACL_ERRORS, + nullptr, nullptr)) + { + DWORD dwError = GetLastError(); + if (dwError == ERROR_FILE_NOT_FOUND // no strDestPath file? + || dwError == ERROR_UNABLE_TO_MOVE_REPLACEMENT // e.g., files on different volumes + || dwError == ERROR_UNABLE_TO_MOVE_REPLACEMENT_2 + || dwError == ERROR_UNABLE_TO_REMOVE_REPLACED) + error = osl_moveFile(strPath, strDestPath); + else + error = oslTranslateFileError(dwError); + } + } + + return error; +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |