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comparison: intl/uconv/ucvcn/nsGBKConvUtil.cpp
intl/uconv/ucvcn/nsGBKConvUtil.cpp
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:4d458b802c23 |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 #include "nsGBKConvUtil.h" | |
| 7 #include "gbku.h" | |
| 8 #include "nsDebug.h" | |
| 9 #define MAX_GBK_LENGTH 24066 /* (0xfe-0x80)*(0xfe-0x3f) */ | |
| 10 //-------------------------------------------------------------------- | |
| 11 // nsGBKConvUtil | |
| 12 //-------------------------------------------------------------------- | |
| 13 | |
| 14 static const char16_t gGBKToUnicodeTable[MAX_GBK_LENGTH] = { | |
| 15 #include "cp936map.h" | |
| 16 }; | |
| 17 static const uint16_t gUnicodeToGBKTable[0xA000-0x4e00] = { | |
| 18 #include "cp936invmap.h" | |
| 19 }; | |
| 20 | |
| 21 bool nsGBKConvUtil::UnicodeToGBKChar( | |
| 22 char16_t aChar, bool aToGL, char* | |
| 23 aOutByte1, char* aOutByte2) | |
| 24 { | |
| 25 bool found=false; | |
| 26 *aOutByte1 = *aOutByte2 = 0; | |
| 27 if(UNICHAR_IN_RANGE(0xd800, aChar, 0xdfff)) | |
| 28 { | |
| 29 // surrogate is not in here | |
| 30 return false; | |
| 31 } | |
| 32 if(UNICHAR_IN_RANGE(0x4e00, aChar, 0x9FFF)) | |
| 33 { | |
| 34 uint16_t item = gUnicodeToGBKTable[aChar - 0x4e00]; | |
| 35 if(item != 0) | |
| 36 { | |
| 37 *aOutByte1 = item >> 8; | |
| 38 *aOutByte2 = item & 0x00FF; | |
| 39 found = true; | |
| 40 } else { | |
| 41 return false; | |
| 42 } | |
| 43 } else { | |
| 44 // ugly linear search | |
| 45 for( int32_t i = 0; i < MAX_GBK_LENGTH; i++ ) | |
| 46 { | |
| 47 if( aChar == gGBKToUnicodeTable[i]) | |
| 48 { | |
| 49 *aOutByte1 = (i / 0x00BF + 0x0081) ; | |
| 50 *aOutByte2 = (i % 0x00BF + 0x0040) ; | |
| 51 found = true; | |
| 52 break; | |
| 53 } | |
| 54 } | |
| 55 } | |
| 56 if(! found) | |
| 57 return false; | |
| 58 | |
| 59 if(aToGL) { | |
| 60 // to GL, we only return if it is in the range | |
| 61 if(UINT8_IN_RANGE(0xA1, *aOutByte1, 0xFE) && | |
| 62 UINT8_IN_RANGE(0xA1, *aOutByte2, 0xFE)) | |
| 63 { | |
| 64 // mask them to GL | |
| 65 *aOutByte1 &= 0x7F; | |
| 66 *aOutByte2 &= 0x7F; | |
| 67 } else { | |
| 68 // if it does not fit into 0xa1-0xfe 0xa1-0xfe range that mean | |
| 69 // it is not a GB2312 character, we cannot map to GL | |
| 70 *aOutByte1 = 0x00; | |
| 71 *aOutByte2 = 0x00; | |
| 72 return false; | |
| 73 } | |
| 74 } | |
| 75 return true; | |
| 76 } | |
| 77 char16_t nsGBKConvUtil::GBKCharToUnicode(char aByte1, char aByte2) | |
| 78 { | |
| 79 NS_ASSERTION(UINT8_IN_RANGE(0x81,aByte1, 0xFE), "first byte out of range"); | |
| 80 NS_ASSERTION(UINT8_IN_RANGE(0x40,aByte2, 0xFE), "second byte out of range"); | |
| 81 | |
| 82 uint8_t i1 = (uint8_t)aByte1; | |
| 83 uint8_t i2 = (uint8_t)aByte2; | |
| 84 uint16_t idx = (i1 - 0x0081) * 0x00bf + i2 - 0x0040 ; | |
| 85 | |
| 86 NS_ASSERTION(idx < MAX_GBK_LENGTH, "ARB"); | |
| 87 // play it safe- add if statement here ot protect ARB | |
| 88 // probably not necessary | |
| 89 if(idx < MAX_GBK_LENGTH) | |
| 90 return gGBKToUnicodeTable[ idx ]; | |
| 91 else | |
| 92 return UCS2_NO_MAPPING; | |
| 93 } |
