iconvdata/jisx0213.h

   1 /* Functions for JISX0213 conversion.
   2    Copyright (C) 2002-2020 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, see
  18    <https://www.gnu.org/licenses/>.  */
  19
  20 #ifndef _JISX0213_H
  21 #define _JISX0213_H     1
  22
  23 #include <stdint.h>
  24
  25 extern const uint16_t __jisx0213_to_ucs_combining[][2];
  26 extern const uint16_t __jisx0213_to_ucs_main[120 * 94];
  27 extern const uint32_t __jisx0213_to_ucs_pagestart[];
  28 extern const int16_t __jisx0213_from_ucs_level1[2715];
  29 extern const uint16_t __jisx0213_from_ucs_level2[];
  30
  31 #define NELEMS(arr) (sizeof (arr) / sizeof (arr[0]))
  32
  33 static inline uint32_t
  34 __attribute ((always_inline))
  35 jisx0213_to_ucs4 (unsigned int row, unsigned int col)
  36 {
  37   uint32_t val;
  38
  39   if (row >= 0x121 && row <= 0x17e)
  40     row -= 289;
  41   else if (row == 0x221)
  42     row -= 451;
  43   else if (row >= 0x223 && row <= 0x225)
  44     row -= 452;
  45   else if (row == 0x228)
  46     row -= 454;
  47   else if (row >= 0x22c && row <= 0x22f)
  48     row -= 457;
  49   else if (row >= 0x26e && row <= 0x27e)
  50     row -= 519;
  51   else
  52     return 0x0000;
  53
  54   if (col >= 0x21 && col <= 0x7e)
  55     col -= 0x21;
  56   else
  57     return 0x0000;
  58
  59   val = __jisx0213_to_ucs_main[row * 94 + col];
  60   val = __jisx0213_to_ucs_pagestart[val >> 8] + (val & 0xff);
  61   if (val == 0xfffd)
  62     val = 0x0000;
  63   return val;
  64 }
  65
  66 static inline uint16_t
  67 __attribute ((always_inline))
  68 ucs4_to_jisx0213 (uint32_t ucs)
  69 {
  70   if (ucs < NELEMS (__jisx0213_from_ucs_level1) << 6)
  71     {
  72       int index1 = __jisx0213_from_ucs_level1[ucs >> 6];
  73       if (index1 >= 0)
  74         return __jisx0213_from_ucs_level2[(index1 << 6) + (ucs & 0x3f)];
  75     }
  76   return 0x0000;
  77 }
  78
  79 static inline int
  80 __attribute ((always_inline))
  81 jisx0213_added_in_2004_p (uint16_t val)
  82 {
  83   /* From JISX 0213:2000 to JISX 0213:2004, 10 characters were added to
  84      plane 1, and plane 2 was left unchanged.  See ISO-IR-233.  */
  85   switch (val >> 8)
  86     {
  87     case 0x2e:
  88       return val == 0x2e21;
  89     case 0x2f:
  90       return val == 0x2f7e;
  91     case 0x4f:
  92       return val == 0x4f54 || val == 0x4f7e;
  93     case 0x74:
  94       return val == 0x7427;
  95     case 0x7e:
  96       return val >= 0x7e7a && val <= 0x7e7e;
  97     default:
  98       return 0;
  99     }
 100 }
 101
 102 #endif /* _JISX0213_H */