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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 #include "../../include/fxcrt/fx_basic.h" | 7 #include "../../include/fxcrt/fx_basic.h" |
| 8 void CFX_UTF8Decoder::Clear() | 8 void CFX_UTF8Decoder::Clear() |
| 9 { | 9 { |
| 10 m_Buffer.Clear(); | 10 m_Buffer.Clear(); |
| 11 m_PendingBytes = 0; | 11 m_PendingBytes = 0; |
| 12 } | 12 } |
| 13 void CFX_UTF8Decoder::AppendChar(FX_DWORD ch) | 13 void CFX_UTF8Decoder::AppendChar(FX_DWORD ch) |
| 14 { | 14 { |
| 15 m_Buffer.AppendChar((FX_WCHAR)ch); | 15 m_Buffer.AppendChar((FX_WCHAR)ch); |
| 16 } | 16 } |
| 17 void CFX_UTF8Decoder::Input(FX_BYTE byte) | 17 void CFX_UTF8Decoder::Input(uint8_t byte) |
| 18 { | 18 { |
| 19 if (byte < 0x80) { | 19 if (byte < 0x80) { |
| 20 m_PendingBytes = 0; | 20 m_PendingBytes = 0; |
| 21 m_Buffer.AppendChar(byte); | 21 m_Buffer.AppendChar(byte); |
| 22 } else if (byte < 0xc0) { | 22 } else if (byte < 0xc0) { |
| 23 if (m_PendingBytes == 0) { | 23 if (m_PendingBytes == 0) { |
| 24 return; | 24 return; |
| 25 } | 25 } |
| 26 m_PendingBytes --; | 26 m_PendingBytes --; |
| 27 m_PendingChar |= (byte & 0x3f) << (m_PendingBytes * 6); | 27 m_PendingChar |= (byte & 0x3f) << (m_PendingBytes * 6); |
| (...skipping 30 matching lines...) Expand all Loading... |
| 58 nbytes = 2; | 58 nbytes = 2; |
| 59 } else if ((FX_DWORD)unicode < 0x10000) { | 59 } else if ((FX_DWORD)unicode < 0x10000) { |
| 60 nbytes = 3; | 60 nbytes = 3; |
| 61 } else if ((FX_DWORD)unicode < 0x200000) { | 61 } else if ((FX_DWORD)unicode < 0x200000) { |
| 62 nbytes = 4; | 62 nbytes = 4; |
| 63 } else if ((FX_DWORD)unicode < 0x4000000) { | 63 } else if ((FX_DWORD)unicode < 0x4000000) { |
| 64 nbytes = 5; | 64 nbytes = 5; |
| 65 } else { | 65 } else { |
| 66 nbytes = 6; | 66 nbytes = 6; |
| 67 } | 67 } |
| 68 static FX_BYTE prefix[] = {0xc0, 0xe0, 0xf0, 0xf8, 0xfc}; | 68 static uint8_t prefix[] = {0xc0, 0xe0, 0xf0, 0xf8, 0xfc}; |
| 69 int order = 1 << ((nbytes - 1) * 6); | 69 int order = 1 << ((nbytes - 1) * 6); |
| 70 int code = unicode; | 70 int code = unicode; |
| 71 m_Buffer.AppendChar(prefix[nbytes - 2] | (code / order)); | 71 m_Buffer.AppendChar(prefix[nbytes - 2] | (code / order)); |
| 72 for (int i = 0; i < nbytes - 1; i ++) { | 72 for (int i = 0; i < nbytes - 1; i ++) { |
| 73 code = code % order; | 73 code = code % order; |
| 74 order >>= 6; | 74 order >>= 6; |
| 75 m_Buffer.AppendChar(0x80 | (code / order)); | 75 m_Buffer.AppendChar(0x80 | (code / order)); |
| 76 } | 76 } |
| 77 } | 77 } |
| 78 } | 78 } |
| 79 CFX_ByteString FX_UTF8Encode(FX_LPCWSTR pwsStr, FX_STRSIZE len) | 79 CFX_ByteString FX_UTF8Encode(FX_LPCWSTR pwsStr, FX_STRSIZE len) |
| 80 { | 80 { |
| 81 FXSYS_assert(pwsStr != NULL); | 81 FXSYS_assert(pwsStr != NULL); |
| 82 if (len < 0) { | 82 if (len < 0) { |
| 83 len = FXSYS_wcslen(pwsStr); | 83 len = FXSYS_wcslen(pwsStr); |
| 84 } | 84 } |
| 85 CFX_UTF8Encoder encoder; | 85 CFX_UTF8Encoder encoder; |
| 86 while (len -- > 0) { | 86 while (len -- > 0) { |
| 87 encoder.Input(*pwsStr ++); | 87 encoder.Input(*pwsStr ++); |
| 88 } | 88 } |
| 89 return encoder.GetResult(); | 89 return encoder.GetResult(); |
| 90 } | 90 } |
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