ruby--ruby/enc/windows_1253.c

/**********************************************************************
  windows_1253.c -  Oniguruma (regular expression library)
**********************************************************************/
/*-
 * Copyright (c) 2002-2007  K.Kosako  <sndgk393 AT ybb DOT ne DOT jp>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

/*
 * Name: windows-1253
 * MIBenum: 2253
 * Link: http://www.iana.org/assignments/character-sets
 * Link: http://www.microsoft.com/globaldev/reference/sbcs/1253.mspx
 * Link: http://en.wikipedia.org/wiki/Windows-1253
 */

#include "regenc.h"

#define ENC_CP1253_TO_LOWER_CASE(c) EncCP1253_ToLowerCaseTable[c]
#define ENC_IS_CP1253_CTYPE(code,ctype) \
  ((EncCP1253_CtypeTable[code] & CTYPE_TO_BIT(ctype)) != 0)

static const UChar EncCP1253_ToLowerCaseTable[256] = {
  '\000', '\001', '\002', '\003', '\004', '\005', '\006', '\007',
  '\010', '\011', '\012', '\013', '\014', '\015', '\016', '\017',
  '\020', '\021', '\022', '\023', '\024', '\025', '\026', '\027',
  '\030', '\031', '\032', '\033', '\034', '\035', '\036', '\037',
  '\040', '\041', '\042', '\043', '\044', '\045', '\046', '\047',
  '\050', '\051', '\052', '\053', '\054', '\055', '\056', '\057',
  '\060', '\061', '\062', '\063', '\064', '\065', '\066', '\067',
  '\070', '\071', '\072', '\073', '\074', '\075', '\076', '\077',
  '\100', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
  '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
  '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
  '\170', '\171', '\172', '\133', '\134', '\135', '\136', '\137',
  '\140', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
  '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
  '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
  '\170', '\171', '\172', '\173', '\174', '\175', '\176', '\177',
  '\200', '\201', '\202', '\203', '\204', '\205', '\206', '\207',
  '\210', '\211', '\212', '\213', '\214', '\215', '\216', '\217',
  '\220', '\221', '\222', '\223', '\224', '\225', '\226', '\227',
  '\230', '\231', '\232', '\233', '\234', '\235', '\236', '\237',
  '\240', '\241', '\334', '\243', '\244', '\245', '\246', '\247',
  '\250', '\251', '\252', '\253', '\254', '\255', '\256', '\257',
  '\260', '\261', '\262', '\263', '\264', '\354', '\334', '\267',
  '\335', '\336', '\337', '\273', '\374', '\275', '\375', '\376',
  '\300', '\341', '\342', '\343', '\344', '\345', '\346', '\347',
  '\350', '\351', '\352', '\353', '\354', '\355', '\356', '\357',
  '\360', '\361', '\322', '\363', '\364', '\365', '\366', '\367',
  '\370', '\371', '\372', '\373', '\334', '\335', '\336', '\337',
  '\340', '\341', '\342', '\343', '\344', '\345', '\346', '\347',
  '\350', '\351', '\352', '\353', '\354', '\355', '\356', '\357',
  '\360', '\361', '\362', '\363', '\364', '\365', '\366', '\367',
  '\370', '\371', '\372', '\373', '\374', '\375', '\376', '\377'
};

static const unsigned short EncCP1253_CtypeTable[256] = {
  0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008,
  0x4008, 0x420c, 0x4209, 0x4208, 0x4208, 0x4208, 0x4008, 0x4008,
  0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008,
  0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008,
  0x4284, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0,
  0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0,
  0x78b0, 0x78b0, 0x78b0, 0x78b0, 0x78b0, 0x78b0, 0x78b0, 0x78b0,
  0x78b0, 0x78b0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0,
  0x41a0, 0x7ca2, 0x7ca2, 0x7ca2, 0x7ca2, 0x7ca2, 0x7ca2, 0x74a2,
  0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2,
  0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2,
  0x74a2, 0x74a2, 0x74a2, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x51a0,
  0x41a0, 0x78e2, 0x78e2, 0x78e2, 0x78e2, 0x78e2, 0x78e2, 0x70e2,
  0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2,
  0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2,
  0x70e2, 0x70e2, 0x70e2, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x4008,
  0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008,
  0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008,
  0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008,
  0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008,
  0x0284, 0x01a0, 0x34a2, 0x00a0, 0x0000, 0x0000, 0x00a0, 0x00a0,
  0x00a0, 0x00a0, 0x0000, 0x01a0, 0x00a0, 0x01a0, 0x0000, 0x01a0,
  0x00a0, 0x00a0, 0x10a0, 0x10a0, 0x00a0, 0x30e2, 0x34a2, 0x01a0,
  0x34a2, 0x34a2, 0x34a2, 0x01a0, 0x34a2, 0x10a0, 0x34a2, 0x34a2,
  0x30e2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2,
  0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2,
  0x34a2, 0x34a2, 0x0000, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2,
  0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x30e2, 0x30e2, 0x30e2, 0x30e2,
  0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2,
  0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2,
  0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2,
  0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x0000
};

static int
mbc_case_fold(OnigCaseFoldType flag,
	      const UChar** pp, const UChar* end ARG_UNUSED, UChar* lower,
	      OnigEncoding enc ARG_UNUSED)
{
  const UChar* p = *pp;

  *lower = ENC_CP1253_TO_LOWER_CASE(*p);
  (*pp)++;
  return 1;
}

#if 0
static int
is_mbc_ambiguous(OnigCaseFoldType flag,
		 const UChar** pp, const UChar* end)
{
  int v;
  const UChar* p = *pp;

  (*pp)++;
  v = (EncCP1253_CtypeTable[*p] & (BIT_CTYPE_UPPER | BIT_CTYPE_LOWER));
  if ((v | BIT_CTYPE_LOWER) != 0) {
    if (*p == 0xc0 || *p == 0xe0)
      return FALSE;
    else
      return TRUE;
  }

  return (v != 0 ? TRUE : FALSE);
}
#endif

static int
is_code_ctype(OnigCodePoint code, unsigned int ctype, OnigEncoding enc ARG_UNUSED)
{
  if (code < 256)
    return ENC_IS_CP1253_CTYPE(code, ctype);
  else
    return FALSE;
}

static const OnigPairCaseFoldCodes CaseFoldMap[] = {
 { 0xb6, 0xdc },
 { 0xb8, 0xdd },
 { 0xb9, 0xde },
 { 0xba, 0xdf },
 { 0xbc, 0xfc },
 { 0xbe, 0xfd },
 { 0xbf, 0xfe },

 { 0xc1, 0xe1 },
 { 0xc2, 0xe2 },
 { 0xc3, 0xe3 },
 { 0xc4, 0xe4 },
 { 0xc5, 0xe5 },
 { 0xc6, 0xe6 },
 { 0xc7, 0xe7 },
 { 0xc8, 0xe8 },
 { 0xc9, 0xe9 },
 { 0xca, 0xea },
 { 0xcb, 0xeb },
 { 0xcc, 0xec },
 { 0xcd, 0xed },
 { 0xce, 0xee },
 { 0xcf, 0xef },

 { 0xd0, 0xf0 },
 { 0xd1, 0xf1 },
 { 0xd2, 0xf2 },
 { 0xd3, 0xf3 },
 { 0xd4, 0xf4 },
 { 0xd5, 0xf5 },
 { 0xd6, 0xf6 },
 { 0xd7, 0xf7 },
 { 0xd8, 0xf8 },
 { 0xd9, 0xf9 },
 { 0xda, 0xfa },
 { 0xdb, 0xfb }
};

static int
apply_all_case_fold(OnigCaseFoldType flag,
		    OnigApplyAllCaseFoldFunc f, void* arg,
		    OnigEncoding enc ARG_UNUSED)
{
  return onigenc_apply_all_case_fold_with_map(
	     numberof(CaseFoldMap), CaseFoldMap, 0,
	     flag, f, arg);
}

static int
get_case_fold_codes_by_str(OnigCaseFoldType flag,
			   const OnigUChar* p, const OnigUChar* end,
			   OnigCaseFoldCodeItem items[],
			   OnigEncoding enc ARG_UNUSED)
{
  return onigenc_get_case_fold_codes_by_str_with_map(
	     numberof(CaseFoldMap), CaseFoldMap, 0,
	     flag, p, end, items);
}

static int
case_map (OnigCaseFoldType* flagP, const OnigUChar** pp,
	   const OnigUChar* end, OnigUChar* to, OnigUChar* to_end,
	   const struct OnigEncodingTypeST* enc)
{
  OnigCodePoint code;
  OnigUChar *to_start = to;
  OnigCaseFoldType flags = *flagP;

  while (*pp<end && to<to_end) {
    code = *(*pp)++;
    if (code==0xF2) {
      if (flags&ONIGENC_CASE_UPCASE) {
	flags |= ONIGENC_CASE_MODIFIED;
	code = 0xD3;
      }
      else if (flags&ONIGENC_CASE_FOLD) {
	flags |= ONIGENC_CASE_MODIFIED;
	code = 0xF3;
      }
    }
    else if (code==0xB5) {
      if (flags&ONIGENC_CASE_UPCASE) {
	flags |= ONIGENC_CASE_MODIFIED;
	code = 0xCC;
      }
      else if (flags&ONIGENC_CASE_FOLD) {
	flags |= ONIGENC_CASE_MODIFIED;
	code = 0xEC;
      }
    }
    else if (code==0xC0 || code==0xE0 || code==0xB6)  ;
    else if ((EncCP1253_CtypeTable[code] & BIT_CTYPE_UPPER)
	     && (flags & (ONIGENC_CASE_DOWNCASE|ONIGENC_CASE_FOLD))) {
      flags |= ONIGENC_CASE_MODIFIED;
      code = ENC_CP1253_TO_LOWER_CASE(code);
    }
    else if ((EncCP1253_CtypeTable[code] & BIT_CTYPE_LOWER)
	     && (flags&ONIGENC_CASE_UPCASE)) {
      flags |= ONIGENC_CASE_MODIFIED;
      if (code==0xB5)
	code = 0xCC;
      else if (code==0xDC)
	code = 0xA2;
      else if (code>=0xDD && code<=0xDF)
	code -= 0x25;
      else if (code==0xFC)
	code = 0xBC;
      else if (code==0xFD || code==0xFE)
	code -= 0x3F;
      else
	code -= 0x20;
    }
    *to++ = code;
    if (flags&ONIGENC_CASE_TITLECASE)  /* switch from titlecase to lowercase for capitalize */
      flags ^= (ONIGENC_CASE_UPCASE|ONIGENC_CASE_DOWNCASE|ONIGENC_CASE_TITLECASE);
  }
  *flagP = flags;
  return (int)(to-to_start);
}

OnigEncodingDefine(windows_1253, Windows_1253) = {
  onigenc_single_byte_mbc_enc_len,
  "Windows-1253",  /* name */
  1,             /* max enc length */
  1,             /* min enc length */
  onigenc_is_mbc_newline_0x0a,
  onigenc_single_byte_mbc_to_code,
  onigenc_single_byte_code_to_mbclen,
  onigenc_single_byte_code_to_mbc,
  mbc_case_fold,
  apply_all_case_fold,
  get_case_fold_codes_by_str,
  onigenc_minimum_property_name_to_ctype,
  is_code_ctype,
  onigenc_not_support_get_ctype_code_range,
  onigenc_single_byte_left_adjust_char_head,
  onigenc_always_true_is_allowed_reverse_match,
  0,
  ONIGENC_FLAG_NONE,
  case_map,
};
ENC_ALIAS("CP1253", "Windows-1253")