202 lines
5.6 KiB
C++
202 lines
5.6 KiB
C++
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//+---------------------------------------------------------------------------
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//
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// Copyright (C) 1992 - 1997 Microsoft Corporation.
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//
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// File: cphash.cxx
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//
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// Contents: Table that maps strings to codepages
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//
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// Classes: CCodePageTable
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//
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// Note: Derived from SitaramR's hash table
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//
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//----------------------------------------------------------------------------
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#include <pch.cxx>
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#pragma hdrstop
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#include <cphash.hxx>
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const ULONG CODE_JPN_JIS = 1;
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const ULONG CODE_JPN_EUC = 2;
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//
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// Note: These must be all lowercase and kept in alphabetical order
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//
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const CCodePageEntry CCodePageTable::_aEntries[] =
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{
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{ L"ansi_x3.4-1968", 1252 },
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{ L"ansi_x3.4-1986", 1252 },
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{ L"ascii", 1252 },
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{ L"big5", 950 },
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{ L"chinese", 936 },
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{ L"cp367", 1252 },
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{ L"cp819", 1252 },
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{ L"csascii", 1252 },
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{ L"csbig5", 950 },
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{ L"cseuckr", 949 },
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{ L"cseucpkdfmtjapanese", CODE_JPN_EUC },
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{ L"csgb2312", 936 },
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{ L"csiso2022jp", CODE_JPN_JIS },
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{ L"csiso2022kr", 50225 },
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{ L"csiso58gb231280", 936 },
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{ L"csisolatin2", 28592 },
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{ L"csisolatinhebrew", 1255 },
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{ L"cskoi8r", 20866 },
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{ L"csksc56011987", 949 },
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{ L"csshiftjis", 932 },
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{ L"euc-kr", 949 },
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{ L"extended_unix_code_packed_format_for_japanese", CODE_JPN_EUC },
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{ L"gb2312", 936 },
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{ L"gb_2312-80", 936 },
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{ L"hebrew", 1255 },
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{ L"hz-gb-2312", 936 },
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{ L"ibm367", 1252 },
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{ L"ibm819", 1252 },
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{ L"ibm852", 852 },
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{ L"ibm866", 866 },
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{ L"iso-2022-jp", CODE_JPN_JIS },
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{ L"iso-2022-kr", 50225 },
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{ L"iso-8859-1", 1252 },
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{ L"iso-8859-2", 28592 },
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{ L"iso-8859-8", 1255 },
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{ L"iso-ir-100", 1252 },
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{ L"iso-ir-101", 28592 },
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{ L"iso-ir-138", 1255 },
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{ L"iso-ir-149", 949 },
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{ L"iso-ir-58", 936 },
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{ L"iso-ir-6", 1252 },
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{ L"iso646-us", 1252 },
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{ L"iso8859-1", 1252 },
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{ L"iso8859-2", 28592 },
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{ L"iso_646.irv:1991", 1252 },
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{ L"iso_8859-1", 1252 },
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{ L"iso_8859-1:1987", 1252 },
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{ L"iso_8859-2", 28592 },
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{ L"iso_8859-2:1987", 28592 },
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{ L"iso_8859-8", 1255 },
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{ L"iso_8859-8:1988", 1255 },
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{ L"koi8-r", 20866 },
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{ L"korean", 949 },
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{ L"ks-c-5601", 949 },
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{ L"ks-c-5601-1987", 949 },
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{ L"ks_c_5601", 949 },
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{ L"ks_c_5601-1987", 949 },
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{ L"ks_c_5601-1989", 949 },
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{ L"ksc-5601", 949 },
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{ L"ksc5601", 949 },
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{ L"ksc_5601", 949 },
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{ L"l2", 28592 },
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{ L"latin1", 1252 },
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{ L"latin2", 28592 },
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{ L"ms_kanji", 932 },
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{ L"shift-jis", 932 },
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{ L"shift_jis", 932 },
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{ L"us", 1252 },
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{ L"us-ascii", 1252 },
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{ L"windows-1250", 1250 },
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{ L"windows-1251", 1251 },
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{ L"windows-1252", 1252 },
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{ L"windows-1253", 1253 },
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{ L"windows-1254", 1254 },
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{ L"windows-1255", 1255 },
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{ L"windows-1256", 1256 },
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{ L"windows-1257", 1257 },
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{ L"windows-1258", 1258 },
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{ L"windows-874", 874 },
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{ L"x-cp1250", 1250 },
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{ L"x-cp1251", 1251 },
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{ L"x-euc", CODE_JPN_EUC },
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{ L"x-euc-jp", CODE_JPN_EUC },
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{ L"x-sjis", 932 },
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{ L"x-x-big5", 950 },
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};
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const unsigned CCodePageTable::_cEntries = sizeof CCodePageTable::_aEntries /
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sizeof CCodePageTable::_aEntries[0];
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//+---------------------------------------------------------------------------
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//
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// Method: EntryCompare, private, static
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//
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// Synposis: Compares a string with a string in a CCodePageEntry.
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// Called by bsearch.
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//
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// Arguments: [pwcKey] -- key for comparison
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// [pEntry] -- entry for comparison
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//
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// Returns: < 0 if pwcKey < pEntry
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// 0 if identical
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// > 0 if pwcKey > pEntry
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//
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// History: 27-Aug-97 dlee Created
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//
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//----------------------------------------------------------------------------
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int __cdecl CCodePageTable::EntryCompare(
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WCHAR const * pwcKey,
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CCodePageEntry const * pEntry )
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{
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return wcscmp( pwcKey, pEntry->pwcName );
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} //EntryCompare
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//+---------------------------------------------------------------------------
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//
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// Method: Lookup, public, static
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//
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// Synposis: Finds a codepage based on string and returns the codepage
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// The lookup is case-insensitive.
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//
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// Arguments: [pwcName] -- not-necessarily null terminated string
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// [cwcName] -- # of wide characters in pwcName
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// [ulCodePage] -- returns the corresponding codepage
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//
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// Returns: TRUE if the codepage name was found, FALSE otherwise
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//
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// History: 27-Aug-97 dlee Created
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//
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//----------------------------------------------------------------------------
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BOOL CCodePageTable::Lookup(
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WCHAR const * pwcName,
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unsigned cwcName,
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ULONG & ulCodePage )
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{
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//
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// Limit the length of codepage strings
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//
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WCHAR awcLowcase[ 100 ];
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if ( cwcName >= ( sizeof awcLowcase / sizeof WCHAR ) )
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return FALSE;
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//
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// Convert the string to lowercase.
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//
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RtlCopyMemory( awcLowcase, pwcName, cwcName * sizeof WCHAR );
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awcLowcase[ cwcName ] = 0;
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_wcslwr( awcLowcase );
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//
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// Try to find the codepage using the C runtime binary search function
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//
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CCodePageEntry * pEntry = (CCodePageEntry *)
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bsearch( awcLowcase,
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_aEntries,
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_cEntries,
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sizeof CCodePageEntry,
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(int (__cdecl *)(const void *, const void *) )
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EntryCompare );
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if ( 0 == pEntry )
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return FALSE;
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ulCodePage = pEntry->ulCodePage;
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return TRUE;
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} //Lookup
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