1 // Copyright 2014 PDFium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com 6 7 #include "core/fxcrt/fxcrt_posix.h" 8 9 #include "core/fxcrt/fx_basic.h" 10 11 #if _FXM_PLATFORM_ == _FXM_PLATFORM_LINUX_ || \ 12 _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_ || \ 13 _FXM_PLATFORM_ == _FXM_PLATFORM_ANDROID_ 14 15 // static 16 IFXCRT_FileAccess* IFXCRT_FileAccess::Create() { 17 return new CFXCRT_FileAccess_Posix; 18 } 19 20 void FXCRT_Posix_GetFileMode(uint32_t dwModes, 21 int32_t& nFlags, 22 int32_t& nMasks) { 23 nFlags = O_BINARY | O_LARGEFILE; 24 if (dwModes & FX_FILEMODE_ReadOnly) { 25 nFlags |= O_RDONLY; 26 nMasks = 0; 27 } else { 28 nFlags |= O_RDWR | O_CREAT; 29 if (dwModes & FX_FILEMODE_Truncate) { 30 nFlags |= O_TRUNC; 31 } 32 nMasks = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH; 33 } 34 } 35 CFXCRT_FileAccess_Posix::CFXCRT_FileAccess_Posix() : m_nFD(-1) {} 36 CFXCRT_FileAccess_Posix::~CFXCRT_FileAccess_Posix() { 37 Close(); 38 } 39 40 bool CFXCRT_FileAccess_Posix::Open(const CFX_ByteStringC& fileName, 41 uint32_t dwMode) { 42 if (m_nFD > -1) 43 return false; 44 45 int32_t nFlags; 46 int32_t nMasks; 47 FXCRT_Posix_GetFileMode(dwMode, nFlags, nMasks); 48 m_nFD = open(fileName.c_str(), nFlags, nMasks); 49 return m_nFD > -1; 50 } 51 52 bool CFXCRT_FileAccess_Posix::Open(const CFX_WideStringC& fileName, 53 uint32_t dwMode) { 54 return Open(FX_UTF8Encode(fileName).AsStringC(), dwMode); 55 } 56 57 void CFXCRT_FileAccess_Posix::Close() { 58 if (m_nFD < 0) { 59 return; 60 } 61 close(m_nFD); 62 m_nFD = -1; 63 } 64 FX_FILESIZE CFXCRT_FileAccess_Posix::GetSize() const { 65 if (m_nFD < 0) { 66 return 0; 67 } 68 struct stat s; 69 FXSYS_memset(&s, 0, sizeof(s)); 70 fstat(m_nFD, &s); 71 return s.st_size; 72 } 73 FX_FILESIZE CFXCRT_FileAccess_Posix::GetPosition() const { 74 if (m_nFD < 0) { 75 return (FX_FILESIZE)-1; 76 } 77 return lseek(m_nFD, 0, SEEK_CUR); 78 } 79 FX_FILESIZE CFXCRT_FileAccess_Posix::SetPosition(FX_FILESIZE pos) { 80 if (m_nFD < 0) { 81 return (FX_FILESIZE)-1; 82 } 83 return lseek(m_nFD, pos, SEEK_SET); 84 } 85 size_t CFXCRT_FileAccess_Posix::Read(void* pBuffer, size_t szBuffer) { 86 if (m_nFD < 0) { 87 return 0; 88 } 89 return read(m_nFD, pBuffer, szBuffer); 90 } 91 size_t CFXCRT_FileAccess_Posix::Write(const void* pBuffer, size_t szBuffer) { 92 if (m_nFD < 0) { 93 return 0; 94 } 95 return write(m_nFD, pBuffer, szBuffer); 96 } 97 size_t CFXCRT_FileAccess_Posix::ReadPos(void* pBuffer, 98 size_t szBuffer, 99 FX_FILESIZE pos) { 100 if (m_nFD < 0) { 101 return 0; 102 } 103 if (pos >= GetSize()) { 104 return 0; 105 } 106 if (SetPosition(pos) == (FX_FILESIZE)-1) { 107 return 0; 108 } 109 return Read(pBuffer, szBuffer); 110 } 111 size_t CFXCRT_FileAccess_Posix::WritePos(const void* pBuffer, 112 size_t szBuffer, 113 FX_FILESIZE pos) { 114 if (m_nFD < 0) { 115 return 0; 116 } 117 if (SetPosition(pos) == (FX_FILESIZE)-1) { 118 return 0; 119 } 120 return Write(pBuffer, szBuffer); 121 } 122 123 bool CFXCRT_FileAccess_Posix::Flush() { 124 if (m_nFD < 0) 125 return false; 126 127 return fsync(m_nFD) > -1; 128 } 129 130 bool CFXCRT_FileAccess_Posix::Truncate(FX_FILESIZE szFile) { 131 if (m_nFD < 0) 132 return false; 133 134 return !ftruncate(m_nFD, szFile); 135 } 136 137 #endif 138