iconvdata/jisx0213.h

   1 /* Functions for JISX0213 conversion.
   2    Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Bruno Haible <bruno@clisp.org>, 2002.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #ifndef _JISX0213_H
  22 #define _JISX0213_H     1
  23
  24 #include <stdint.h>
  25
  26 extern const uint16_t __jisx0213_to_ucs_combining[][2];
  27 extern const uint16_t __jisx0213_to_ucs_main[120 * 94];
  28 extern const uint32_t __jisx0213_to_ucs_pagestart[];
  29 extern const int16_t __jisx0213_from_ucs_level1[2715];
  30 extern const uint16_t __jisx0213_from_ucs_level2[];
  31
  32 #define NELEMS(arr) (sizeof (arr) / sizeof (arr[0]))
  33
  34 static inline uint32_t
  35 __attribute ((always_inline))
  36 jisx0213_to_ucs4 (unsigned int row, unsigned int col)
  37 {
  38   uint32_t val;
  39
  40   if (row >= 0x121 && row <= 0x17e)
  41     row -= 289;
  42   else if (row == 0x221)
  43     row -= 451;
  44   else if (row >= 0x223 && row <= 0x225)
  45     row -= 452;
  46   else if (row == 0x228)
  47     row -= 454;
  48   else if (row >= 0x22c && row <= 0x22f)
  49     row -= 457;
  50   else if (row >= 0x26e && row <= 0x27e)
  51     row -= 519;
  52   else
  53     return 0x0000;
  54
  55   if (col >= 0x21 && col <= 0x7e)
  56     col -= 0x21;
  57   else
  58     return 0x0000;
  59
  60   val = __jisx0213_to_ucs_main[row * 94 + col];
  61   val = __jisx0213_to_ucs_pagestart[val >> 8] + (val & 0xff);
  62   if (val == 0xfffd)
  63     val = 0x0000;
  64   return val;
  65 }
  66
  67 static inline uint16_t
  68 __attribute ((always_inline))
  69 ucs4_to_jisx0213 (uint32_t ucs)
  70 {
  71   if (ucs < NELEMS (__jisx0213_from_ucs_level1) << 6)
  72     {
  73       int index1 = __jisx0213_from_ucs_level1[ucs >> 6];
  74       if (index1 >= 0)
  75         return __jisx0213_from_ucs_level2[(index1 << 6) + (ucs & 0x3f)];
  76     }
  77   return 0x0000;
  78 }
  79
  80 static inline int
  81 __attribute ((always_inline))
  82 jisx0213_added_in_2004_p (uint16_t val)
  83 {
  84   /* From JISX 0213:2000 to JISX 0213:2004, 10 characters were added to
  85      plane 1, and plane 2 was left unchanged.  See ISO-IR-233.  */
  86   switch (val >> 8)
  87     {
  88     case 0x2e:
  89       return val == 0x2e21;
  90     case 0x2f:
  91       return val == 0x2f7e;
  92     case 0x4f:
  93       return val == 0x4f54 || val == 0x4f7e;
  94     case 0x74:
  95       return val == 0x7427;
  96     case 0x7e:
  97       return val >= 0x7e7a && val <= 0x7e7e;
  98     default:
  99       return 0;
 100     }
 101 }
 102
 103 #endif /* _JISX0213_H */