1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/intl/uconv/ucvcn/nsUnicodeToHZ.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,116 @@
1.4 +/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 + /**
1.9 + * A character set converter from Unicode to HZ.
1.10 + *
1.11 + *
1.12 + * @created 08/Sept/1999
1.13 + * @author Yueheng Xu, Yueheng.Xu@intel.com
1.14 + * Revision History
1.15 + * 04/Oct/1999. Yueheng Xu: Fixed line continuation problem when line
1.16 + * ended by '~';
1.17 + * Used table UnicodeToGBK[] to speed up the mapping.
1.18 + */
1.19 +#include "nsUnicodeToHZ.h"
1.20 +#include "gbku.h"
1.21 +//----------------------------------------------------------------------
1.22 +// Class nsUnicodeToGBK [implementation]
1.23 +#define HZ_STATE_GB 1
1.24 +#define HZ_STATE_ASCII 2
1.25 +#define HZ_STATE_TILD 3
1.26 +#define HZLEAD1 '~'
1.27 +#define HZLEAD2 '{'
1.28 +#define HZLEAD3 '}'
1.29 +#define UNICODE_TILD 0x007E
1.30 +nsUnicodeToHZ::nsUnicodeToHZ() : nsEncoderSupport(6)
1.31 +{
1.32 + mHZState = HZ_STATE_ASCII; // per HZ spec, default to HZ mode
1.33 +}
1.34 +NS_IMETHODIMP nsUnicodeToHZ::ConvertNoBuff(
1.35 + const char16_t * aSrc,
1.36 + int32_t * aSrcLength,
1.37 + char * aDest,
1.38 + int32_t * aDestLength)
1.39 +{
1.40 + int32_t i=0;
1.41 + int32_t iSrcLength = *aSrcLength;
1.42 + int32_t iDestLength = 0;
1.43 +
1.44 + for (i=0;i< iSrcLength;i++)
1.45 + {
1.46 + if(! IS_ASCII(*aSrc))
1.47 + {
1.48 + // hi byte has something, it is not ASCII, process as a GB
1.49 + if ( mHZState != HZ_STATE_GB )
1.50 + {
1.51 + // we are adding a '~{' ESC sequence to star a HZ string
1.52 + mHZState = HZ_STATE_GB;
1.53 + aDest[0] = '~';
1.54 + aDest[1] = '{';
1.55 + aDest += 2; // increment 2 bytes
1.56 + iDestLength +=2;
1.57 + }
1.58 + if(mUtil.UnicodeToGBKChar(*aSrc, true, &aDest[0], &aDest[1])) {
1.59 + aDest += 2; // increment 2 bytes
1.60 + iDestLength +=2;
1.61 + } else {
1.62 + // some thing that we cannot convert
1.63 + // xxx fix me ftang
1.64 + // error handling here
1.65 + }
1.66 + } else {
1.67 + // this is an ASCII
1.68 +
1.69 + // if we are in HZ mode, end it by adding a '~}' ESC sequence
1.70 + if ( mHZState == HZ_STATE_GB )
1.71 + {
1.72 + mHZState = HZ_STATE_ASCII;
1.73 + aDest[0] = '~';
1.74 + aDest[1] = '}';
1.75 + aDest += 2; // increment 2 bytes
1.76 + iDestLength +=2;
1.77 + }
1.78 +
1.79 + // if this is a regular char '~' , convert it to two '~'
1.80 + if ( *aSrc == UNICODE_TILD )
1.81 + {
1.82 + aDest[0] = '~';
1.83 + aDest[1] = '~';
1.84 + aDest += 2; // increment 2 bytes
1.85 + iDestLength +=2;
1.86 + } else {
1.87 + // other regular ASCII chars convert by normal ways
1.88 +
1.89 + // Is this works for both little endian and big endian machines ?
1.90 + *aDest = (char) ( (char16_t)(*aSrc) );
1.91 + aDest++; // increment 1 byte
1.92 + iDestLength +=1;
1.93 + }
1.94 + }
1.95 + aSrc++; // increment 2 bytes
1.96 + if ( iDestLength >= (*aDestLength) )
1.97 + {
1.98 + break;
1.99 + }
1.100 + }
1.101 + *aDestLength = iDestLength;
1.102 + *aSrcLength = i;
1.103 + return NS_OK;
1.104 +}
1.105 +
1.106 +NS_IMETHODIMP nsUnicodeToHZ::FinishNoBuff(char * aDest, int32_t * aDestLength)
1.107 +{
1.108 + if ( mHZState == HZ_STATE_GB )
1.109 + {
1.110 + // if we are in HZ mode, end it by adding a '~}' ESC sequence
1.111 + mHZState = HZ_STATE_ASCII;
1.112 + aDest[0] = '~';
1.113 + aDest[1] = '}';
1.114 + *aDestLength = 2;
1.115 + } else {
1.116 + *aDestLength = 0;
1.117 + }
1.118 + return NS_OK;
1.119 +}
