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| 1 // Copyright 2014 PDFium Authors. All rights reserved. | 1 // Copyright 2014 PDFium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com | 5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com |
| 6 | 6 |
| 7 #ifndef CORE_SRC_FXCRT_EXTENSION_H_ | 7 #ifndef CORE_SRC_FXCRT_EXTENSION_H_ |
| 8 #define CORE_SRC_FXCRT_EXTENSION_H_ | 8 #define CORE_SRC_FXCRT_EXTENSION_H_ |
| 9 | 9 |
| 10 #include "../../include/fxcrt/fx_basic.h" | 10 #include "../../include/fxcrt/fx_basic.h" |
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| 25 virtual size_t ReadPos(void* pBuffer, size_t szBuffer, FX_FILESIZE pos) = 0; | 25 virtual size_t ReadPos(void* pBuffer, size_t szBuffer, FX_FILESIZE pos) = 0; |
| 26 virtual size_t WritePos(const void* pBuffer, | 26 virtual size_t WritePos(const void* pBuffer, |
| 27 size_t szBuffer, | 27 size_t szBuffer, |
| 28 FX_FILESIZE pos) = 0; | 28 FX_FILESIZE pos) = 0; |
| 29 virtual FX_BOOL Flush() = 0; | 29 virtual FX_BOOL Flush() = 0; |
| 30 virtual FX_BOOL Truncate(FX_FILESIZE szFile) = 0; | 30 virtual FX_BOOL Truncate(FX_FILESIZE szFile) = 0; |
| 31 }; | 31 }; |
| 32 IFXCRT_FileAccess* FXCRT_FileAccess_Create(); | 32 IFXCRT_FileAccess* FXCRT_FileAccess_Create(); |
| 33 class CFX_CRTFileStream final : public IFX_FileStream { | 33 class CFX_CRTFileStream final : public IFX_FileStream { |
| 34 public: | 34 public: |
| 35 CFX_CRTFileStream(IFXCRT_FileAccess* pFA) | 35 CFX_CRTFileStream(IFXCRT_FileAccess* pFA) : m_pFile(pFA), m_dwCount(1) {} |
| 36 : m_pFile(pFA), | |
| 37 m_dwCount(1) { | |
| 38 } | |
| 39 ~CFX_CRTFileStream() { | 36 ~CFX_CRTFileStream() { |
| 40 if (m_pFile) { | 37 if (m_pFile) { |
| 41 m_pFile->Release(); | 38 m_pFile->Release(); |
| 42 } | 39 } |
| 43 } | 40 } |
| 44 virtual IFX_FileStream* Retain() override { | 41 virtual IFX_FileStream* Retain() override { |
| 45 m_dwCount++; | 42 m_dwCount++; |
| 46 return this; | 43 return this; |
| 47 } | 44 } |
| 48 virtual void Release() override { | 45 virtual void Release() override { |
| 49 FX_DWORD nCount = --m_dwCount; | 46 FX_DWORD nCount = --m_dwCount; |
| 50 if (!nCount) { | 47 if (!nCount) { |
| 51 delete this; | 48 delete this; |
| 52 } | 49 } |
| 53 } | 50 } |
| 54 virtual FX_FILESIZE GetSize() override { | 51 virtual FX_FILESIZE GetSize() override { return m_pFile->GetSize(); } |
| 55 return m_pFile->GetSize(); | |
| 56 } | |
| 57 virtual FX_BOOL IsEOF() override { return GetPosition() >= GetSize(); } | 52 virtual FX_BOOL IsEOF() override { return GetPosition() >= GetSize(); } |
| 58 virtual FX_FILESIZE GetPosition() override { | 53 virtual FX_FILESIZE GetPosition() override { return m_pFile->GetPosition(); } |
| 59 return m_pFile->GetPosition(); | |
| 60 } | |
| 61 virtual FX_BOOL ReadBlock(void* buffer, | 54 virtual FX_BOOL ReadBlock(void* buffer, |
| 62 FX_FILESIZE offset, | 55 FX_FILESIZE offset, |
| 63 size_t size) override { | 56 size_t size) override { |
| 64 return (FX_BOOL)m_pFile->ReadPos(buffer, size, offset); | 57 return (FX_BOOL)m_pFile->ReadPos(buffer, size, offset); |
| 65 } | 58 } |
| 66 virtual size_t ReadBlock(void* buffer, size_t size) override { | 59 virtual size_t ReadBlock(void* buffer, size_t size) override { |
| 67 return m_pFile->Read(buffer, size); | 60 return m_pFile->Read(buffer, size); |
| 68 } | 61 } |
| 69 virtual FX_BOOL WriteBlock(const void* buffer, | 62 virtual FX_BOOL WriteBlock(const void* buffer, |
| 70 FX_FILESIZE offset, | 63 FX_FILESIZE offset, |
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| 113 m_dwCount++; | 106 m_dwCount++; |
| 114 return this; | 107 return this; |
| 115 } | 108 } |
| 116 virtual void Release() override { | 109 virtual void Release() override { |
| 117 FX_DWORD nCount = --m_dwCount; | 110 FX_DWORD nCount = --m_dwCount; |
| 118 if (nCount) { | 111 if (nCount) { |
| 119 return; | 112 return; |
| 120 } | 113 } |
| 121 delete this; | 114 delete this; |
| 122 } | 115 } |
| 123 virtual FX_FILESIZE GetSize() override { | 116 virtual FX_FILESIZE GetSize() override { return (FX_FILESIZE)m_nCurSize; } |
| 124 return (FX_FILESIZE)m_nCurSize; | |
| 125 } | |
| 126 virtual FX_BOOL IsEOF() override { return m_nCurPos >= (size_t)GetSize(); } | 117 virtual FX_BOOL IsEOF() override { return m_nCurPos >= (size_t)GetSize(); } |
| 127 virtual FX_FILESIZE GetPosition() override { | 118 virtual FX_FILESIZE GetPosition() override { return (FX_FILESIZE)m_nCurPos; } |
| 128 return (FX_FILESIZE)m_nCurPos; | |
| 129 } | |
| 130 virtual FX_BOOL ReadBlock(void* buffer, | 119 virtual FX_BOOL ReadBlock(void* buffer, |
| 131 FX_FILESIZE offset, | 120 FX_FILESIZE offset, |
| 132 size_t size) override { | 121 size_t size) override { |
| 133 if (!buffer || !size) { | 122 if (!buffer || !size) { |
| 134 return FALSE; | 123 return FALSE; |
| 135 } | 124 } |
| 136 | 125 |
| 137 FX_SAFE_SIZE_T newPos = size; | 126 FX_SAFE_SIZE_T newPos = size; |
| 138 newPos += offset; | 127 newPos += offset; |
| 139 if (!newPos.IsValid() || newPos.ValueOrDefault(0) == 0 || | 128 if (!newPos.IsValid() || newPos.ValueOrDefault(0) == 0 || |
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| 317 } FX_MTRANDOMCONTEXT, *FX_LPMTRANDOMCONTEXT; | 306 } FX_MTRANDOMCONTEXT, *FX_LPMTRANDOMCONTEXT; |
| 318 typedef FX_MTRANDOMCONTEXT const* FX_LPCMTRANDOMCONTEXT; | 307 typedef FX_MTRANDOMCONTEXT const* FX_LPCMTRANDOMCONTEXT; |
| 319 #if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_ | 308 #if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_ |
| 320 FX_BOOL FX_GenerateCryptoRandom(FX_DWORD* pBuffer, int32_t iCount); | 309 FX_BOOL FX_GenerateCryptoRandom(FX_DWORD* pBuffer, int32_t iCount); |
| 321 #endif | 310 #endif |
| 322 #ifdef __cplusplus | 311 #ifdef __cplusplus |
| 323 } | 312 } |
| 324 #endif | 313 #endif |
| 325 | 314 |
| 326 #endif // CORE_SRC_FXCRT_EXTENSION_H_ | 315 #endif // CORE_SRC_FXCRT_EXTENSION_H_ |
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