1  /* FriBidi
       2   * fribidi-char-sets-cp1255.c - CP1255 character set conversion routines
       3   *
       4   * Authors:
       5   *   Behdad Esfahbod, 2001, 2002, 2004
       6   *   Dov Grobgeld, 1999, 2000
       7   *
       8   * Copyright (C) 2004 Sharif FarsiWeb, Inc
       9   * Copyright (C) 2001,2002 Behdad Esfahbod
      10   * Copyright (C) 1999,2000 Dov Grobgeld
      11   * 
      12   * This library is free software; you can redistribute it and/or
      13   * modify it under the terms of the GNU Lesser General Public
      14   * License as published by the Free Software Foundation; either
      15   * version 2.1 of the License, or (at your option) any later version.
      16   * 
      17   * This library is distributed in the hope that it will be useful,
      18   * but WITHOUT ANY WARRANTY; without even the implied warranty of
      19   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      20   * Lesser General Public License for more details.
      21   * 
      22   * You should have received a copy of the GNU Lesser General Public License
      23   * along with this library, in a file named COPYING; if not, write to the
      24   * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
      25   * Boston, MA 02110-1301, USA
      26   * 
      27   * For licensing issues, contact <fribidi.license@gmail.com>.
      28   */
      29  
      30  #include <common.h>
      31  
      32  #include <fribidi-char-sets-cp1255.h>
      33  
      34  #define ISO_ALEF		0xE0
      35  #define ISO_TAV			0xFA
      36  #define CP1255_SHEVA		0xC0
      37  #define CP1255_SOF_PASUQ	0xD3
      38  #define CP1255_DOUBLE_VAV	0xD4
      39  #define CP1255_GERSHAYIM	0xD8
      40  #define CP1255_LRM		0xFD
      41  #define CP1255_RLM		0xFE
      42  
      43  #define UNI_ALEF		0x05D0
      44  #define UNI_TAV			0x05EA
      45  #define UNI_SHEVA		0x05B0
      46  #define UNI_SOF_PASUQ		0x05C3
      47  #define UNI_DOUBLE_VAV		0x05F0
      48  #define UNI_GERSHAYIM		0x05F4
      49  #define UNI_LRM			0x200E
      50  #define UNI_RLM			0x200F
      51  
      52  static FriBidiChar fribidi_cp1255_to_unicode_tab[] = {	/* 0x80-0xBF */
      53    0x20AC, 0x0081, 0x201A, 0x0192, 0x201E, 0x2026, 0x2020, 0x2021,
      54    0x02C6, 0x2030, 0x008a, 0x2039, 0x008c, 0x008d, 0x008e, 0x008f,
      55    0x0090, 0x2018, 0x2019, 0x201C, 0x201D, 0x2022, 0x2013, 0x2014,
      56    0x02DC, 0x2122, 0x009a, 0x203A, 0x009c, 0x009d, 0x009e, 0x009f,
      57    0x00A0, 0x00A1, 0x00A2, 0x00A3, 0x20AA, 0x00A5, 0x00A6, 0x00A7,
      58    0x00A8, 0x00A9, 0x00D7, 0x00AB, 0x00AC, 0x00AD, 0x00AE, 0x00AF,
      59    0x00B0, 0x00B1, 0x00B2, 0x00B3, 0x00B4, 0x00B5, 0x00B6, 0x00B7,
      60    0x00B8, 0x00B9, 0x00F7, 0x00BB, 0x00BC, 0x00BD, 0x00BE, 0x00BF
      61  };
      62  
      63  FriBidiChar
      64  fribidi_cp1255_to_unicode_c (
      65    /* input */
      66    char sch
      67  )
      68  {
      69    register unsigned char ch = (unsigned char) sch;
      70    if (ch >= ISO_ALEF && ch <= ISO_TAV)
      71      return ch - ISO_ALEF + UNI_ALEF;
      72    else if (ch >= CP1255_SHEVA && ch <= CP1255_SOF_PASUQ)
      73      return ch - CP1255_SHEVA + UNI_SHEVA;
      74    else if (ch >= CP1255_DOUBLE_VAV && ch <= CP1255_GERSHAYIM)
      75      return ch - CP1255_DOUBLE_VAV + UNI_DOUBLE_VAV;
      76    /* cp1256 specific chars */
      77    else if (ch >= 0x80 && ch <= 0xbf)
      78      return fribidi_cp1255_to_unicode_tab[ch - 0x80];
      79    else if (ch == CP1255_LRM || ch == CP1255_RLM) 
      80      return ch - CP1255_LRM + UNI_LRM;
      81      /* treat LRM/LRM charrectes correctly */
      82    else 
      83      return ch;
      84  }
      85  
      86  char
      87  fribidi_unicode_to_cp1255_c (
      88    /* input */
      89    FriBidiChar uch
      90  )
      91  {
      92    if (uch >= UNI_ALEF && uch <= UNI_TAV)
      93      return (char) (uch - UNI_ALEF + ISO_ALEF);
      94    if (uch >= UNI_SHEVA && uch <= UNI_SOF_PASUQ)
      95      return (char) (uch - UNI_SHEVA + CP1255_SHEVA);
      96    if (uch >= UNI_DOUBLE_VAV && uch <= UNI_GERSHAYIM)
      97      return (char) (uch - UNI_DOUBLE_VAV + CP1255_DOUBLE_VAV);
      98    /* TODO: handle pre-composed and presentation chars */
      99    if (uch == UNI_LRM || uch==UNI_RLM)
     100      return (char) (uch - UNI_LRM + CP1255_LRM);
     101      /* Treat LRM/RLM charrecters correctly */
     102    else if (uch < 256)
     103      return (char) uch;
     104    else
     105      return '?';
     106  }
     107  
     108  /* Editor directions:
     109   * vim:textwidth=78:tabstop=8:shiftwidth=2:autoindent:cindent
     110   */