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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 CORE_INCLUDE_FXCRT_FX_STREAM_H_ | |
8 #define CORE_INCLUDE_FXCRT_FX_STREAM_H_ | |
9 | |
10 #include "core/include/fxcrt/fx_string.h" | |
11 #include "core/include/fxcrt/fx_system.h" | |
12 | |
13 void* FX_OpenFolder(const FX_CHAR* path); | |
14 void* FX_OpenFolder(const FX_WCHAR* path); | |
15 FX_BOOL FX_GetNextFile(void* handle, | |
16 CFX_ByteString& filename, | |
17 FX_BOOL& bFolder); | |
18 FX_BOOL FX_GetNextFile(void* handle, | |
19 CFX_WideString& filename, | |
20 FX_BOOL& bFolder); | |
21 void FX_CloseFolder(void* handle); | |
22 FX_WCHAR FX_GetFolderSeparator(); | |
23 | |
24 #if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_ | |
25 #define FX_FILESIZE int32_t | |
26 #else | |
27 #include <fcntl.h> | |
28 #include <sys/stat.h> | |
29 #include <unistd.h> | |
30 | |
31 #ifndef O_BINARY | |
32 #define O_BINARY 0 | |
33 #endif // O_BINARY | |
34 | |
35 #ifndef O_LARGEFILE | |
36 #define O_LARGEFILE 0 | |
37 #endif // O_LARGEFILE | |
38 | |
39 #define FX_FILESIZE off_t | |
40 #endif // _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_ | |
41 | |
42 #define FX_GETBYTEOFFSET32(a) 0 | |
43 #define FX_GETBYTEOFFSET40(a) 0 | |
44 #define FX_GETBYTEOFFSET48(a) 0 | |
45 #define FX_GETBYTEOFFSET56(a) 0 | |
46 #define FX_GETBYTEOFFSET24(a) ((uint8_t)(a >> 24)) | |
47 #define FX_GETBYTEOFFSET16(a) ((uint8_t)(a >> 16)) | |
48 #define FX_GETBYTEOFFSET8(a) ((uint8_t)(a >> 8)) | |
49 #define FX_GETBYTEOFFSET0(a) ((uint8_t)(a)) | |
50 #define FX_FILEMODE_Write 0 | |
51 #define FX_FILEMODE_ReadOnly 1 | |
52 #define FX_FILEMODE_Truncate 2 | |
53 | |
54 class IFX_StreamWrite { | |
55 public: | |
56 virtual ~IFX_StreamWrite() {} | |
57 virtual void Release() = 0; | |
58 virtual FX_BOOL WriteBlock(const void* pData, size_t size) = 0; | |
59 }; | |
60 | |
61 class IFX_FileWrite : public IFX_StreamWrite { | |
62 public: | |
63 // IFX_StreamWrite: | |
64 FX_BOOL WriteBlock(const void* pData, size_t size) override; | |
65 virtual FX_FILESIZE GetSize() = 0; | |
66 virtual FX_BOOL Flush() = 0; | |
67 virtual FX_BOOL WriteBlock(const void* pData, | |
68 FX_FILESIZE offset, | |
69 size_t size) = 0; | |
70 }; | |
71 | |
72 class IFX_StreamRead { | |
73 public: | |
74 virtual ~IFX_StreamRead() {} | |
75 | |
76 virtual void Release() = 0; | |
77 virtual FX_BOOL IsEOF() = 0; | |
78 virtual FX_FILESIZE GetPosition() = 0; | |
79 virtual size_t ReadBlock(void* buffer, size_t size) = 0; | |
80 }; | |
81 | |
82 class IFX_FileRead : IFX_StreamRead { | |
83 public: | |
84 // IFX_StreamRead: | |
85 void Release() override = 0; | |
86 FX_BOOL IsEOF() override; | |
87 FX_FILESIZE GetPosition() override; | |
88 size_t ReadBlock(void* buffer, size_t size) override; | |
89 | |
90 virtual FX_BOOL ReadBlock(void* buffer, FX_FILESIZE offset, size_t size) = 0; | |
91 virtual FX_FILESIZE GetSize() = 0; | |
92 }; | |
93 | |
94 IFX_FileRead* FX_CreateFileRead(const FX_CHAR* filename); | |
95 IFX_FileRead* FX_CreateFileRead(const FX_WCHAR* filename); | |
96 | |
97 class IFX_FileStream : public IFX_FileRead, public IFX_FileWrite { | |
98 public: | |
99 virtual IFX_FileStream* Retain() = 0; | |
100 | |
101 // IFX_FileRead: | |
102 void Release() override = 0; | |
103 FX_BOOL IsEOF() override = 0; | |
104 FX_FILESIZE GetPosition() override = 0; | |
105 size_t ReadBlock(void* buffer, size_t size) override = 0; | |
106 FX_BOOL ReadBlock(void* buffer, FX_FILESIZE offset, size_t size) override = 0; | |
107 FX_FILESIZE GetSize() override = 0; | |
108 | |
109 // IFX_FileWrite: | |
110 FX_BOOL WriteBlock(const void* buffer, | |
111 FX_FILESIZE offset, | |
112 size_t size) override = 0; | |
113 FX_BOOL WriteBlock(const void* buffer, size_t size) override; | |
114 FX_BOOL Flush() override = 0; | |
115 }; | |
116 | |
117 IFX_FileStream* FX_CreateFileStream(const FX_CHAR* filename, FX_DWORD dwModes); | |
118 IFX_FileStream* FX_CreateFileStream(const FX_WCHAR* filename, FX_DWORD dwModes); | |
119 | |
120 #ifdef PDF_ENABLE_XFA | |
121 class IFX_FileAccess { | |
122 public: | |
123 virtual ~IFX_FileAccess() {} | |
124 virtual void Release() = 0; | |
125 virtual IFX_FileAccess* Retain() = 0; | |
126 virtual void GetPath(CFX_WideString& wsPath) = 0; | |
127 virtual IFX_FileStream* CreateFileStream(FX_DWORD dwModes) = 0; | |
128 }; | |
129 IFX_FileAccess* FX_CreateDefaultFileAccess(const CFX_WideStringC& wsPath); | |
130 #endif // PDF_ENABLE_XFA | |
131 | |
132 class IFX_MemoryStream : public IFX_FileStream { | |
133 public: | |
134 virtual FX_BOOL IsConsecutive() const = 0; | |
135 virtual void EstimateSize(size_t nInitSize, size_t nGrowSize) = 0; | |
136 virtual uint8_t* GetBuffer() const = 0; | |
137 virtual void AttachBuffer(uint8_t* pBuffer, | |
138 size_t nSize, | |
139 FX_BOOL bTakeOver = FALSE) = 0; | |
140 virtual void DetachBuffer() = 0; | |
141 }; | |
142 | |
143 IFX_MemoryStream* FX_CreateMemoryStream(uint8_t* pBuffer, | |
144 size_t nSize, | |
145 FX_BOOL bTakeOver = FALSE); | |
146 IFX_MemoryStream* FX_CreateMemoryStream(FX_BOOL bConsecutive = FALSE); | |
147 | |
148 class IFX_BufferRead : public IFX_StreamRead { | |
149 public: | |
150 // IFX_StreamRead: | |
151 void Release() override = 0; | |
152 FX_BOOL IsEOF() override = 0; | |
153 FX_FILESIZE GetPosition() override = 0; | |
154 size_t ReadBlock(void* buffer, size_t size) override = 0; | |
155 | |
156 virtual FX_BOOL ReadNextBlock(FX_BOOL bRestart = FALSE) = 0; | |
157 virtual const uint8_t* GetBlockBuffer() = 0; | |
158 virtual size_t GetBlockSize() = 0; | |
159 virtual FX_FILESIZE GetBlockOffset() = 0; | |
160 }; | |
161 | |
162 #endif // CORE_INCLUDE_FXCRT_FX_STREAM_H_ | |
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