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comparison: intl/uconv/ucvcn/nsUnicodeToHZ.cpp
intl/uconv/ucvcn/nsUnicodeToHZ.cpp
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- TOR_BUG_3246
- changeset 4
- fc2d59ddac77
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| -1:000000000000 | 0:e9d7a462dbfb |
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| 1 /* -*- Mode: C; tab-width: 4; 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 * A character set converter from Unicode to HZ. | |
| 7 * | |
| 8 * | |
| 9 * @created 08/Sept/1999 | |
| 10 * @author Yueheng Xu, Yueheng.Xu@intel.com | |
| 11 * Revision History | |
| 12 * 04/Oct/1999. Yueheng Xu: Fixed line continuation problem when line | |
| 13 * ended by '~'; | |
| 14 * Used table UnicodeToGBK[] to speed up the mapping. | |
| 15 */ | |
| 16 #include "nsUnicodeToHZ.h" | |
| 17 #include "gbku.h" | |
| 18 //---------------------------------------------------------------------- | |
| 19 // Class nsUnicodeToGBK [implementation] | |
| 20 #define HZ_STATE_GB 1 | |
| 21 #define HZ_STATE_ASCII 2 | |
| 22 #define HZ_STATE_TILD 3 | |
| 23 #define HZLEAD1 '~' | |
| 24 #define HZLEAD2 '{' | |
| 25 #define HZLEAD3 '}' | |
| 26 #define UNICODE_TILD 0x007E | |
| 27 nsUnicodeToHZ::nsUnicodeToHZ() : nsEncoderSupport(6) | |
| 28 { | |
| 29 mHZState = HZ_STATE_ASCII; // per HZ spec, default to HZ mode | |
| 30 } | |
| 31 NS_IMETHODIMP nsUnicodeToHZ::ConvertNoBuff( | |
| 32 const char16_t * aSrc, | |
| 33 int32_t * aSrcLength, | |
| 34 char * aDest, | |
| 35 int32_t * aDestLength) | |
| 36 { | |
| 37 int32_t i=0; | |
| 38 int32_t iSrcLength = *aSrcLength; | |
| 39 int32_t iDestLength = 0; | |
| 40 | |
| 41 for (i=0;i< iSrcLength;i++) | |
| 42 { | |
| 43 if(! IS_ASCII(*aSrc)) | |
| 44 { | |
| 45 // hi byte has something, it is not ASCII, process as a GB | |
| 46 if ( mHZState != HZ_STATE_GB ) | |
| 47 { | |
| 48 // we are adding a '~{' ESC sequence to star a HZ string | |
| 49 mHZState = HZ_STATE_GB; | |
| 50 aDest[0] = '~'; | |
| 51 aDest[1] = '{'; | |
| 52 aDest += 2; // increment 2 bytes | |
| 53 iDestLength +=2; | |
| 54 } | |
| 55 if(mUtil.UnicodeToGBKChar(*aSrc, true, &aDest[0], &aDest[1])) { | |
| 56 aDest += 2; // increment 2 bytes | |
| 57 iDestLength +=2; | |
| 58 } else { | |
| 59 // some thing that we cannot convert | |
| 60 // xxx fix me ftang | |
| 61 // error handling here | |
| 62 } | |
| 63 } else { | |
| 64 // this is an ASCII | |
| 65 | |
| 66 // if we are in HZ mode, end it by adding a '~}' ESC sequence | |
| 67 if ( mHZState == HZ_STATE_GB ) | |
| 68 { | |
| 69 mHZState = HZ_STATE_ASCII; | |
| 70 aDest[0] = '~'; | |
| 71 aDest[1] = '}'; | |
| 72 aDest += 2; // increment 2 bytes | |
| 73 iDestLength +=2; | |
| 74 } | |
| 75 | |
| 76 // if this is a regular char '~' , convert it to two '~' | |
| 77 if ( *aSrc == UNICODE_TILD ) | |
| 78 { | |
| 79 aDest[0] = '~'; | |
| 80 aDest[1] = '~'; | |
| 81 aDest += 2; // increment 2 bytes | |
| 82 iDestLength +=2; | |
| 83 } else { | |
| 84 // other regular ASCII chars convert by normal ways | |
| 85 | |
| 86 // Is this works for both little endian and big endian machines ? | |
| 87 *aDest = (char) ( (char16_t)(*aSrc) ); | |
| 88 aDest++; // increment 1 byte | |
| 89 iDestLength +=1; | |
| 90 } | |
| 91 } | |
| 92 aSrc++; // increment 2 bytes | |
| 93 if ( iDestLength >= (*aDestLength) ) | |
| 94 { | |
| 95 break; | |
| 96 } | |
| 97 } | |
| 98 *aDestLength = iDestLength; | |
| 99 *aSrcLength = i; | |
| 100 return NS_OK; | |
| 101 } | |
| 102 | |
| 103 NS_IMETHODIMP nsUnicodeToHZ::FinishNoBuff(char * aDest, int32_t * aDestLength) | |
| 104 { | |
| 105 if ( mHZState == HZ_STATE_GB ) | |
| 106 { | |
| 107 // if we are in HZ mode, end it by adding a '~}' ESC sequence | |
| 108 mHZState = HZ_STATE_ASCII; | |
| 109 aDest[0] = '~'; | |
| 110 aDest[1] = '}'; | |
| 111 *aDestLength = 2; | |
| 112 } else { | |
| 113 *aDestLength = 0; | |
| 114 } | |
| 115 return NS_OK; | |
| 116 } |
