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 #ifndef _FX_STREAM_H_ 8 #define _FX_STREAM_H_ 9 #ifndef _FX_MEMORY_H_ 10 #include "fx_memory.h" 11 #endif 12 void* FX_OpenFolder(FX_LPCSTR path); 13 void* FX_OpenFolder(FX_LPCWSTR path); 14 FX_BOOL FX_GetNextFile(void* handle, CFX_ByteString& filename, FX_BOOL& bFolder); 15 FX_BOOL FX_GetNextFile(void* handle, CFX_WideString& filename, FX_BOOL& bFolder); 16 void FX_CloseFolder(void* handle); 17 FX_WCHAR FX_GetFolderSeparator(); 18 FX_DEFINEHANDLE(FX_HFILE) 19 #if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_ 20 #define FX_FILESIZE FX_INT32 21 #else 22 #include <fcntl.h> 23 #include <unistd.h> 24 #include <sys/stat.h> 25 #ifndef O_BINARY 26 #define O_BINARY 0 27 #endif 28 #ifndef O_LARGEFILE 29 #define O_LARGEFILE 0 30 #endif 31 #define FX_FILESIZE off_t 32 #endif 33 #define FX_GETBYTEOFFSET32(a) 0 34 #define FX_GETBYTEOFFSET40(a) 0 35 #define FX_GETBYTEOFFSET48(a) 0 36 #define FX_GETBYTEOFFSET56(a) 0 37 #define FX_GETBYTEOFFSET24(a) ((FX_BYTE)(a>>24)) 38 #define FX_GETBYTEOFFSET16(a) ((FX_BYTE)(a>>16)) 39 #define FX_GETBYTEOFFSET8(a) ((FX_BYTE)(a>>8)) 40 #define FX_GETBYTEOFFSET0(a) ((FX_BYTE)(a)) 41 #define FX_FILEMODE_Write 0 42 #define FX_FILEMODE_ReadOnly 1 43 #define FX_FILEMODE_Truncate 2 44 FX_HFILE FX_File_Open(FX_BSTR fileName, FX_DWORD dwMode, IFX_Allocator* pAllocator = NULL); 45 FX_HFILE FX_File_Open(FX_WSTR fileName, FX_DWORD dwMode, IFX_Allocator* pAllocator = NULL); 46 void FX_File_Close(FX_HFILE hFile, IFX_Allocator* pAllocator = NULL); 47 FX_FILESIZE FX_File_GetSize(FX_HFILE hFile); 48 FX_FILESIZE FX_File_GetPosition(FX_HFILE hFile); 49 FX_FILESIZE FX_File_SetPosition(FX_HFILE hFile, FX_FILESIZE pos); 50 size_t FX_File_Read(FX_HFILE hFile, void* pBuffer, size_t szBuffer); 51 size_t FX_File_ReadPos(FX_HFILE hFile, void* pBuffer, size_t szBuffer, FX_FILESIZE pos); 52 size_t FX_File_Write(FX_HFILE hFile, const void* pBuffer, size_t szBuffer); 53 size_t FX_File_WritePos(FX_HFILE hFile, const void* pBuffer, size_t szBuffer, FX_FILESIZE pos); 54 FX_BOOL FX_File_Flush(FX_HFILE hFile); 55 FX_BOOL FX_File_Truncate(FX_HFILE hFile, FX_FILESIZE szFile); 56 FX_BOOL FX_File_Exist(FX_BSTR fileName); 57 FX_BOOL FX_File_Exist(FX_WSTR fileName); 58 FX_BOOL FX_File_Delete(FX_BSTR fileName); 59 FX_BOOL FX_File_Delete(FX_WSTR fileName); 60 FX_BOOL FX_File_Copy(FX_BSTR fileNameSrc, FX_BSTR fileNameDst); 61 FX_BOOL FX_File_Copy(FX_WSTR fileNameSrc, FX_WSTR fileNameDst); 62 FX_BOOL FX_File_Move(FX_BSTR fileNameSrc, FX_BSTR fileNameDst); 63 FX_BOOL FX_File_Move(FX_WSTR fileNameSrc, FX_WSTR fileNameDst); 64 class IFX_StreamWrite 65 { 66 public: 67 68 virtual void Release() = 0; 69 70 virtual FX_BOOL WriteBlock(const void* pData, size_t size) = 0; 71 }; 72 class IFX_FileWrite : public IFX_StreamWrite 73 { 74 public: 75 76 virtual void Release() = 0; 77 78 virtual FX_FILESIZE GetSize() = 0; 79 80 virtual FX_BOOL Flush() = 0; 81 82 virtual FX_BOOL WriteBlock(const void* pData, FX_FILESIZE offset, size_t size) = 0; 83 virtual FX_BOOL WriteBlock(const void* pData, size_t size) 84 { 85 return WriteBlock(pData, GetSize(), size); 86 } 87 }; 88 IFX_FileWrite* FX_CreateFileWrite(FX_LPCSTR filename, IFX_Allocator* pAllocator = NULL); 89 IFX_FileWrite* FX_CreateFileWrite(FX_LPCWSTR filename, IFX_Allocator* pAllocator = NULL); 90 class IFX_StreamRead 91 { 92 public: 93 94 virtual void Release() = 0; 95 96 virtual FX_BOOL IsEOF() = 0; 97 98 virtual FX_FILESIZE GetPosition() = 0; 99 100 virtual size_t ReadBlock(void* buffer, size_t size) = 0; 101 }; 102 class IFX_FileRead : IFX_StreamRead 103 { 104 public: 105 106 virtual void Release() = 0; 107 108 virtual FX_FILESIZE GetSize() = 0; 109 110 virtual FX_BOOL IsEOF() 111 { 112 return FALSE; 113 } 114 115 virtual FX_FILESIZE GetPosition() 116 { 117 return 0; 118 } 119 120 virtual FX_BOOL SetRange(FX_FILESIZE offset, FX_FILESIZE size) 121 { 122 return FALSE; 123 } 124 125 virtual void ClearRange() {} 126 127 virtual FX_BOOL ReadBlock(void* buffer, FX_FILESIZE offset, size_t size) = 0; 128 129 virtual size_t ReadBlock(void* buffer, size_t size) 130 { 131 return 0; 132 } 133 }; 134 IFX_FileRead* FX_CreateFileRead(FX_LPCSTR filename, IFX_Allocator* pAllocator = NULL); 135 IFX_FileRead* FX_CreateFileRead(FX_LPCWSTR filename, IFX_Allocator* pAllocator = NULL); 136 class IFX_FileStream : public IFX_FileRead, public IFX_FileWrite 137 { 138 public: 139 140 virtual IFX_FileStream* Retain() = 0; 141 142 virtual void Release() = 0; 143 144 virtual FX_FILESIZE GetSize() = 0; 145 146 virtual FX_BOOL IsEOF() = 0; 147 148 virtual FX_FILESIZE GetPosition() = 0; 149 150 virtual FX_BOOL ReadBlock(void* buffer, FX_FILESIZE offset, size_t size) = 0; 151 152 virtual size_t ReadBlock(void* buffer, size_t size) = 0; 153 154 virtual FX_BOOL WriteBlock(const void* buffer, FX_FILESIZE offset, size_t size) = 0; 155 virtual FX_BOOL WriteBlock(const void* buffer, size_t size) 156 { 157 return WriteBlock(buffer, GetSize(), size); 158 } 159 160 virtual FX_BOOL Flush() = 0; 161 }; 162 IFX_FileStream* FX_CreateFileStream(FX_LPCSTR filename, FX_DWORD dwModes, IFX_Allocator* pAllocator = NULL); 163 IFX_FileStream* FX_CreateFileStream(FX_LPCWSTR filename, FX_DWORD dwModes, IFX_Allocator* pAllocator = NULL); 164 class IFX_MemoryStream : public IFX_FileStream 165 { 166 public: 167 168 virtual FX_BOOL IsConsecutive() const = 0; 169 170 virtual void EstimateSize(size_t nInitSize, size_t nGrowSize) = 0; 171 172 virtual FX_LPBYTE GetBuffer() const = 0; 173 174 virtual void AttachBuffer(FX_LPBYTE pBuffer, size_t nSize, FX_BOOL bTakeOver = FALSE) = 0; 175 176 virtual void DetachBuffer() = 0; 177 }; 178 IFX_MemoryStream* FX_CreateMemoryStream(FX_LPBYTE pBuffer, size_t nSize, FX_BOOL bTakeOver = FALSE, IFX_Allocator* pAllocator = NULL); 179 IFX_MemoryStream* FX_CreateMemoryStream(FX_BOOL bConsecutive = FALSE, IFX_Allocator* pAllocator = NULL); 180 class IFX_BufferRead : public IFX_StreamRead 181 { 182 public: 183 184 virtual void Release() = 0; 185 186 virtual FX_BOOL IsEOF() = 0; 187 188 virtual FX_FILESIZE GetPosition() = 0; 189 190 virtual size_t ReadBlock(void* buffer, size_t size) = 0; 191 192 virtual FX_BOOL ReadNextBlock(FX_BOOL bRestart = FALSE) = 0; 193 194 virtual FX_LPCBYTE GetBlockBuffer() = 0; 195 196 virtual size_t GetBlockSize() = 0; 197 198 virtual FX_FILESIZE GetBlockOffset() = 0; 199 }; 200 #endif 201
