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diff --git a/src/mscorlib/src/System/Text/EUCJPEncoding.cs b/src/mscorlib/src/System/Text/EUCJPEncoding.cs
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--- a/src/mscorlib/src/System/Text/EUCJPEncoding.cs
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-// Licensed to the .NET Foundation under one or more agreements.
-// The .NET Foundation licenses this file to you under the MIT license.
-// See the LICENSE file in the project root for more information.
-
-#if FEATURE_CODEPAGES_FILE // requires BaseCodePageEncooding
-namespace System.Text
-{
- using System.Text;
- using System.Globalization;
-
- // EUCJPEncoding
- //
- // EUC-JP Encoding (51932)
- //
- // EUC-JP has the following code points:
- // 00-7F - ASCII
- // 80-8D & 90-9F - Control. (Like Unicode, except for 8e and 8f)
- // A1-FE, A1-FE - 2 byte JIS X 0208 range.
- // 8E, A1-DF - 2 byte half-width Katakana
- // 8F, A1-FE, A1-FE - 3 byte JIX X 0212 range. WE DON'T USE JIS 0212!!!
- //
- // New thoughts:
- // Fixing windows 20932 code page so that all characters can be looked up there.
- //
- // Old thoughts:
- // Windows NLS uses a special CP20932 for EUC-JP, but it is not used by mlang. Windows
- // Maps the 3 byte ranges to the 2 byte CP20932 by masking the 2nd byte with & 0x7F.
- // MLang uses the native windows 932 code page, which is more reliable, however the code points
- // don't line up as nicely as the 20932 code page, however it doesn't have JIS X 0212 support.
- //
- // So what we do is:
- // 1. For ASCII, leave it alone
- // 2. For half-width Katakana, use the leading byte and convert with 20936 code page.
- // 3. For JIS X 0208, Use the leading & trailing bytes with 20936 code page
- // 4. For JIS X 0212, Remove the lead byte, & 0xFF7F, and use the CP20936 table to convert.
- //
- // Regarding Normalization:
- // Forms KC & KD are precluded because of things like halfwidth Katakana that has compatibility mappings
- // Form D is precluded because of 0x00a8, which changes to space + dierises.
- //
- // I think that IsAlwaysNormalized should probably return true for form C (but not certain)
- //
- // NOTE: We don't use JIS 0212 so we are basically a DBCS code page, we just have to modify
- // the 932 table we're basing this on.
- //
-
- using System;
-
- [Serializable]
- internal class EUCJPEncoding : DBCSCodePageEncoding
- {
- // This pretends to be CP 932 as far as memory tables are concerned.
- public EUCJPEncoding() : base(51932, 932)
- {
- this.m_bUseMlangTypeForSerialization = true;
- }
-
- protected unsafe override String GetMemorySectionName()
- {
- int iUseCodePage = this.bFlagDataTable ? dataTableCodePage : CodePage;
-
- String strName = String.Format(CultureInfo.InvariantCulture, "CodePage_{0}_{1}_{2}_{3}_{4}_EUCJP",
- iUseCodePage, this.pCodePage->VersionMajor, this.pCodePage->VersionMinor,
- this.pCodePage->VersionRevision, this.pCodePage->VersionBuild);
-
- return strName;
- }
-
- // Clean up characters for EUC-JP code pages, etc.
- protected override bool CleanUpBytes(ref int bytes)
- {
- if (bytes >= 0x100)
- {
- // map extended char (0xfa40-0xfc4b) to a special range
- // (ported from mlang)
- if (bytes >= 0xfa40 && bytes <= 0xfc4b)
- {
- if ( bytes >= 0xfa40 && bytes <= 0xfa5b )
- {
- if ( bytes <= 0xfa49 )
- bytes = bytes - 0x0b51 ;
- else if ( bytes >= 0xfa4a && bytes <= 0xfa53 )
- bytes = bytes - 0x072f6 ;
- else if ( bytes >= 0xfa54 && bytes <= 0xfa57 )
- bytes = bytes - 0x0b5b ;
- else if ( bytes == 0xfa58 )
- bytes = 0x878a ;
- else if ( bytes == 0xfa59 )
- bytes = 0x8782 ;
- else if ( bytes == 0xfa5a )
- bytes = 0x8784 ;
- else if ( bytes == 0xfa5b )
- bytes = 0x879a ;
- }
- else if ( bytes >= 0xfa5c && bytes <= 0xfc4b )
- {
- byte tc = unchecked((byte)bytes);
- if ( tc < 0x5c )
- bytes = bytes - 0x0d5f;
- else if ( tc >= 0x80 && tc <= 0x9B )
- bytes = bytes - 0x0d1d;
- else
- bytes = bytes - 0x0d1c;
- }
- }
-
- // Convert 932 code page to 20932 like code page range
- // (also ported from mlang)
- byte bLead = unchecked((byte)(bytes >> 8));
- byte bTrail = unchecked((byte)bytes);
-
- bLead -= ((bLead > (byte)0x9f) ? (byte)0xb1 : (byte)0x71);
- bLead = (byte)((bLead << 1) + 1);
- if (bTrail > (byte)0x9e)
- {
- bTrail -= (byte)0x7e;
- bLead++;
- }
- else
- {
- if (bTrail > (byte)0x7e)
- bTrail--;
- bTrail -= (byte)0x1f;
- }
-
- bytes = ((int)bLead) << 8 | (int)bTrail | 0x8080;
-
- // // Don't step on our katakana special plane, if katakana space return false.
- // if (bytes >= 0x8E00 && bytes <= 0x8EFF)
- // return false;
-
- // Don't step out of our allocated lead byte area.
- // All DBCS lead and trail bytes should be >= 0xa1 and <= 0xfe
- if ((bytes & 0xFF00) < 0xa100 || (bytes & 0xFF00) > 0xfe00 ||
- (bytes & 0xFF) < 0xa1 || (bytes & 0xFF) > 0xfe)
- return false;
-
- // WARNING: Our funky mapping allows illegal values, which we continue to use
- // so that we're compatible with Everett.
- }
- else
- {
- // For 51932 1/2 Katakana gets a 0x8E lead byte
- // Adjust 1/2 Katakana
- if (bytes >= 0xa1 && bytes <= 0xdf)
- {
- bytes |= 0x8E00;
- return true;
- }
-
- // 0x81-0x9f and 0xe0-0xfc CP 932
- // 0x8e and 0xa1-0xfe CP 20932 (we don't use 8e though)
- // b0-df is 1/2 Katakana
- // So 81-9f & e0-fc are 932 lead bytes, a1-fe are our lead bytes
- // so ignore everything above 0x80 except 0xa0 and 0xff
- if (bytes >= 0x81 && bytes != 0xa0 && bytes != 0xff)
- {
- // We set diffent lead bytes later, so just return false
- return false;
- }
- }
-
- return true;
- }
-
- protected override unsafe void CleanUpEndBytes(char* chars)
- {
- // Need to special case CP 51932
- // 0x81-0x9f and 0xe0-0xfc CP 932
- // 0x8e and 0xa1-0xfe CP 20932
- // 0x10 and 0x21-0x9? Us (remapping 932)
- // b0-df is 1/2 Katakana (trail byte)
-
- // A1-FE are DBCS code points
- for (int i = 0xA1; i <= 0xFE; i++)
- chars[i] = LEAD_BYTE_CHAR;
-
- // And 8E is lead byte for Katakana (already set)
- chars[0x8e] = LEAD_BYTE_CHAR;
- }
- }
-}
-#endif // FEATURE_CODEPAGES_FILE