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enc/iso_8859_2.c

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00001 /**********************************************************************
00002   iso8859_2.c -  Oniguruma (regular expression library)
00003 **********************************************************************/
00004 /*-
00005  * Copyright (c) 2002-2007  K.Kosako  <sndgk393 AT ybb DOT ne DOT jp>
00006  * All rights reserved.
00007  *
00008  * Redistribution and use in source and binary forms, with or without
00009  * modification, are permitted provided that the following conditions
00010  * are met:
00011  * 1. Redistributions of source code must retain the above copyright
00012  *    notice, this list of conditions and the following disclaimer.
00013  * 2. Redistributions in binary form must reproduce the above copyright
00014  *    notice, this list of conditions and the following disclaimer in the
00015  *    documentation and/or other materials provided with the distribution.
00016  *
00017  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
00018  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00019  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00020  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
00021  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
00022  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
00023  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
00024  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
00025  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
00026  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
00027  * SUCH DAMAGE.
00028  */
00029 
00030 #include "regenc.h"
00031 
00032 #define ENC_ISO_8859_2_TO_LOWER_CASE(c) EncISO_8859_2_ToLowerCaseTable[c]
00033 #define ENC_IS_ISO_8859_2_CTYPE(code,ctype) \
00034   ((EncISO_8859_2_CtypeTable[code] & CTYPE_TO_BIT(ctype)) != 0)
00035 
00036 static const UChar EncISO_8859_2_ToLowerCaseTable[256] = {
00037   '\000', '\001', '\002', '\003', '\004', '\005', '\006', '\007',
00038   '\010', '\011', '\012', '\013', '\014', '\015', '\016', '\017',
00039   '\020', '\021', '\022', '\023', '\024', '\025', '\026', '\027',
00040   '\030', '\031', '\032', '\033', '\034', '\035', '\036', '\037',
00041   '\040', '\041', '\042', '\043', '\044', '\045', '\046', '\047',
00042   '\050', '\051', '\052', '\053', '\054', '\055', '\056', '\057',
00043   '\060', '\061', '\062', '\063', '\064', '\065', '\066', '\067',
00044   '\070', '\071', '\072', '\073', '\074', '\075', '\076', '\077',
00045   '\100', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
00046   '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
00047   '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
00048   '\170', '\171', '\172', '\133', '\134', '\135', '\136', '\137',
00049   '\140', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
00050   '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
00051   '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
00052   '\170', '\171', '\172', '\173', '\174', '\175', '\176', '\177',
00053   '\200', '\201', '\202', '\203', '\204', '\205', '\206', '\207',
00054   '\210', '\211', '\212', '\213', '\214', '\215', '\216', '\217',
00055   '\220', '\221', '\222', '\223', '\224', '\225', '\226', '\227',
00056   '\230', '\231', '\232', '\233', '\234', '\235', '\236', '\237',
00057   '\240', '\261', '\242', '\263', '\244', '\265', '\266', '\247',
00058   '\250', '\271', '\272', '\273', '\274', '\255', '\276', '\277',
00059   '\260', '\261', '\262', '\263', '\264', '\265', '\266', '\267',
00060   '\270', '\271', '\272', '\273', '\274', '\275', '\276', '\277',
00061   '\340', '\341', '\342', '\343', '\344', '\345', '\346', '\347',
00062   '\350', '\351', '\352', '\353', '\354', '\355', '\356', '\357',
00063   '\360', '\361', '\362', '\363', '\364', '\365', '\366', '\327',
00064   '\370', '\371', '\372', '\373', '\374', '\375', '\376', '\337',
00065   '\340', '\341', '\342', '\343', '\344', '\345', '\346', '\347',
00066   '\350', '\351', '\352', '\353', '\354', '\355', '\356', '\357',
00067   '\360', '\361', '\362', '\363', '\364', '\365', '\366', '\367',
00068   '\370', '\371', '\372', '\373', '\374', '\375', '\376', '\377'
00069 };
00070 
00071 static const unsigned short EncISO_8859_2_CtypeTable[256] = {
00072   0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008,
00073   0x4008, 0x420c, 0x4209, 0x4208, 0x4208, 0x4208, 0x4008, 0x4008,
00074   0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008,
00075   0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008,
00076   0x4284, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0,
00077   0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0,
00078   0x78b0, 0x78b0, 0x78b0, 0x78b0, 0x78b0, 0x78b0, 0x78b0, 0x78b0,
00079   0x78b0, 0x78b0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0,
00080   0x41a0, 0x7ca2, 0x7ca2, 0x7ca2, 0x7ca2, 0x7ca2, 0x7ca2, 0x74a2,
00081   0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2,
00082   0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2,
00083   0x74a2, 0x74a2, 0x74a2, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x51a0,
00084   0x41a0, 0x78e2, 0x78e2, 0x78e2, 0x78e2, 0x78e2, 0x78e2, 0x70e2,
00085   0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2,
00086   0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2,
00087   0x70e2, 0x70e2, 0x70e2, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x4008,
00088   0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008,
00089   0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008,
00090   0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008,
00091   0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008,
00092   0x0284, 0x34a2, 0x00a0, 0x34a2, 0x00a0, 0x34a2, 0x34a2, 0x00a0,
00093   0x00a0, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x01a0, 0x34a2, 0x34a2,
00094   0x00a0, 0x30e2, 0x00a0, 0x30e2, 0x00a0, 0x30e2, 0x30e2, 0x00a0,
00095   0x00a0, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x00a0, 0x30e2, 0x30e2,
00096   0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2,
00097   0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2,
00098   0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x00a0,
00099   0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x30e2,
00100   0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2,
00101   0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2,
00102   0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x00a0,
00103   0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x00a0
00104 };
00105 
00106 static int
00107 mbc_case_fold(OnigCaseFoldType flag,
00108               const UChar** pp, const UChar* end ARG_UNUSED, UChar* lower,
00109               OnigEncoding enc ARG_UNUSED)
00110 {
00111   const UChar* p = *pp;
00112 
00113   if (*p == 0xdf && (flag & INTERNAL_ONIGENC_CASE_FOLD_MULTI_CHAR) != 0) {
00114     *lower++ = 's';
00115     *lower   = 's';
00116     (*pp)++;
00117     return 2;
00118   }
00119 
00120   *lower = ENC_ISO_8859_2_TO_LOWER_CASE(*p);
00121   (*pp)++;
00122   return 1; /* return byte length of converted char to lower */
00123 }
00124 
00125 #if 0
00126 static int
00127 is_mbc_ambiguous(OnigCaseFoldType flag, const UChar** pp, const UChar* end)
00128 {
00129   int v;
00130   const UChar* p = *pp;
00131 
00132   if (*p == 0xdf && (flag & INTERNAL_ONIGENC_CASE_FOLD_MULTI_CHAR) != 0) {
00133     (*pp)++;
00134     return TRUE;
00135   }
00136 
00137   (*pp)++;
00138   v = (EncISO_8859_2_CtypeTable[*p] & (BIT_CTYPE_UPPER | BIT_CTYPE_LOWER));
00139   if ((v | BIT_CTYPE_LOWER) != 0) {
00140     return TRUE;
00141   }
00142 
00143   return (v != 0 ? TRUE : FALSE);
00144 }
00145 #endif
00146 
00147 static const OnigPairCaseFoldCodes CaseFoldMap[] = {
00148  { 0xa1, 0xb1 },
00149  { 0xa3, 0xb3 },
00150  { 0xa5, 0xb5 },
00151  { 0xa6, 0xb6 },
00152  { 0xa9, 0xb9 },
00153  { 0xaa, 0xba },
00154  { 0xab, 0xbb },
00155  { 0xac, 0xbc },
00156  { 0xae, 0xbe },
00157  { 0xaf, 0xbf },
00158 
00159  { 0xc0, 0xe0 },
00160  { 0xc1, 0xe1 },
00161  { 0xc2, 0xe2 },
00162  { 0xc3, 0xe3 },
00163  { 0xc4, 0xe4 },
00164  { 0xc5, 0xe5 },
00165  { 0xc6, 0xe6 },
00166  { 0xc7, 0xe7 },
00167  { 0xc8, 0xe8 },
00168  { 0xc9, 0xe9 },
00169  { 0xca, 0xea },
00170  { 0xcb, 0xeb },
00171  { 0xcc, 0xec },
00172  { 0xcd, 0xed },
00173  { 0xce, 0xee },
00174  { 0xcf, 0xef },
00175 
00176  { 0xd0, 0xf0 },
00177  { 0xd1, 0xf1 },
00178  { 0xd2, 0xf2 },
00179  { 0xd3, 0xf3 },
00180  { 0xd4, 0xf4 },
00181  { 0xd5, 0xf5 },
00182  { 0xd6, 0xf6 },
00183  { 0xd8, 0xf8 },
00184  { 0xd9, 0xf9 },
00185  { 0xda, 0xfa },
00186  { 0xdb, 0xfb },
00187  { 0xdc, 0xfc },
00188  { 0xdd, 0xfd },
00189  { 0xde, 0xfe }
00190 };
00191 
00192 static int
00193 apply_all_case_fold(OnigCaseFoldType flag,
00194                     OnigApplyAllCaseFoldFunc f, void* arg,
00195                     OnigEncoding enc ARG_UNUSED)
00196 {
00197   return onigenc_apply_all_case_fold_with_map(
00198             sizeof(CaseFoldMap)/sizeof(OnigPairCaseFoldCodes), CaseFoldMap, 1,
00199             flag, f, arg);
00200 }
00201 
00202 static int
00203 get_case_fold_codes_by_str(OnigCaseFoldType flag,
00204                            const OnigUChar* p, const OnigUChar* end,
00205                            OnigCaseFoldCodeItem items[],
00206                            OnigEncoding enc ARG_UNUSED)
00207 {
00208   return onigenc_get_case_fold_codes_by_str_with_map(
00209              sizeof(CaseFoldMap)/sizeof(OnigPairCaseFoldCodes), CaseFoldMap, 1,
00210              flag, p, end, items);
00211 }
00212 
00213 static int
00214 is_code_ctype(OnigCodePoint code, unsigned int ctype, OnigEncoding enc ARG_UNUSED)
00215 {
00216   if (code < 256)
00217     return ENC_IS_ISO_8859_2_CTYPE(code, ctype);
00218   else
00219     return FALSE;
00220 }
00221 
00222 OnigEncodingDefine(iso_8859_2, ISO_8859_2) = {
00223   onigenc_single_byte_mbc_enc_len,
00224   "ISO-8859-2",  /* name */
00225   1,             /* max enc length */
00226   1,             /* min enc length */
00227   onigenc_is_mbc_newline_0x0a,
00228   onigenc_single_byte_mbc_to_code,
00229   onigenc_single_byte_code_to_mbclen,
00230   onigenc_single_byte_code_to_mbc,
00231   mbc_case_fold,
00232   apply_all_case_fold,
00233   get_case_fold_codes_by_str,
00234   onigenc_minimum_property_name_to_ctype,
00235   is_code_ctype,
00236   onigenc_not_support_get_ctype_code_range,
00237   onigenc_single_byte_left_adjust_char_head,
00238   onigenc_always_true_is_allowed_reverse_match
00239 };
00240 ENC_ALIAS("ISO8859-2", "ISO-8859-2")
00241 
00242 /*
00243  * Name: windows-1250
00244  * MIBenum: 2250
00245  * Link: http://www.iana.org/assignments/character-sets
00246  * Link: http://www.microsoft.com/globaldev/reference/sbcs/1250.mspx
00247  * Link: http://en.wikipedia.org/wiki/Windows-1250
00248  */
00249 ENC_REPLICATE("Windows-1250", "ISO-8859-2")
00250 ENC_ALIAS("CP1250", "Windows-1250")
00251 

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