// Copyright 2014 PDFium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com #include "core/fxcrt/fxcrt_posix.h" #include <memory> #include "core/fxcrt/fx_basic.h" #include "third_party/base/ptr_util.h" #ifndef O_BINARY #define O_BINARY 0 #endif // O_BINARY #ifndef O_LARGEFILE #define O_LARGEFILE 0 #endif // O_LARGEFILE #if _FXM_PLATFORM_ == _FXM_PLATFORM_LINUX_ || \ _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_ || \ _FXM_PLATFORM_ == _FXM_PLATFORM_ANDROID_ // static std::unique_ptr<IFXCRT_FileAccess> IFXCRT_FileAccess::Create() { return pdfium::MakeUnique<CFXCRT_FileAccess_Posix>(); } void FXCRT_Posix_GetFileMode(uint32_t dwModes, int32_t& nFlags, int32_t& nMasks) { nFlags = O_BINARY | O_LARGEFILE; if (dwModes & FX_FILEMODE_ReadOnly) { nFlags |= O_RDONLY; nMasks = 0; } else { nFlags |= O_RDWR | O_CREAT; if (dwModes & FX_FILEMODE_Truncate) { nFlags |= O_TRUNC; } nMasks = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH; } } CFXCRT_FileAccess_Posix::CFXCRT_FileAccess_Posix() : m_nFD(-1) {} CFXCRT_FileAccess_Posix::~CFXCRT_FileAccess_Posix() { Close(); } bool CFXCRT_FileAccess_Posix::Open(const CFX_ByteStringC& fileName, uint32_t dwMode) { if (m_nFD > -1) return false; int32_t nFlags; int32_t nMasks; FXCRT_Posix_GetFileMode(dwMode, nFlags, nMasks); // TODO(tsepez): check usage of c_str() below. m_nFD = open(fileName.unterminated_c_str(), nFlags, nMasks); return m_nFD > -1; } bool CFXCRT_FileAccess_Posix::Open(const CFX_WideStringC& fileName, uint32_t dwMode) { return Open(FX_UTF8Encode(fileName).AsStringC(), dwMode); } void CFXCRT_FileAccess_Posix::Close() { if (m_nFD < 0) { return; } close(m_nFD); m_nFD = -1; } FX_FILESIZE CFXCRT_FileAccess_Posix::GetSize() const { if (m_nFD < 0) { return 0; } struct stat s; memset(&s, 0, sizeof(s)); fstat(m_nFD, &s); return s.st_size; } FX_FILESIZE CFXCRT_FileAccess_Posix::GetPosition() const { if (m_nFD < 0) { return (FX_FILESIZE)-1; } return lseek(m_nFD, 0, SEEK_CUR); } FX_FILESIZE CFXCRT_FileAccess_Posix::SetPosition(FX_FILESIZE pos) { if (m_nFD < 0) { return (FX_FILESIZE)-1; } return lseek(m_nFD, pos, SEEK_SET); } size_t CFXCRT_FileAccess_Posix::Read(void* pBuffer, size_t szBuffer) { if (m_nFD < 0) { return 0; } return read(m_nFD, pBuffer, szBuffer); } size_t CFXCRT_FileAccess_Posix::Write(const void* pBuffer, size_t szBuffer) { if (m_nFD < 0) { return 0; } return write(m_nFD, pBuffer, szBuffer); } size_t CFXCRT_FileAccess_Posix::ReadPos(void* pBuffer, size_t szBuffer, FX_FILESIZE pos) { if (m_nFD < 0) { return 0; } if (pos >= GetSize()) { return 0; } if (SetPosition(pos) == (FX_FILESIZE)-1) { return 0; } return Read(pBuffer, szBuffer); } size_t CFXCRT_FileAccess_Posix::WritePos(const void* pBuffer, size_t szBuffer, FX_FILESIZE pos) { if (m_nFD < 0) { return 0; } if (SetPosition(pos) == (FX_FILESIZE)-1) { return 0; } return Write(pBuffer, szBuffer); } bool CFXCRT_FileAccess_Posix::Flush() { if (m_nFD < 0) return false; return fsync(m_nFD) > -1; } bool CFXCRT_FileAccess_Posix::Truncate(FX_FILESIZE szFile) { if (m_nFD < 0) return false; return !ftruncate(m_nFD, szFile); } #endif