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/* Functions for JISX0213 conversion.
Copyright (C) 2002-2020 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Bruno Haible <bruno@clisp.org>, 2002.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#ifndef _JISX0213_H
#define _JISX0213_H 1
#include <stdint.h>
extern const uint16_t __jisx0213_to_ucs_combining[][2];
extern const uint16_t __jisx0213_to_ucs_main[120 * 94];
extern const uint32_t __jisx0213_to_ucs_pagestart[];
extern const int16_t __jisx0213_from_ucs_level1[2715];
extern const uint16_t __jisx0213_from_ucs_level2[];
#define NELEMS(arr) (sizeof (arr) / sizeof (arr[0]))
static inline uint32_t
__attribute ((always_inline))
jisx0213_to_ucs4 (unsigned int row, unsigned int col)
{
uint32_t val;
if (row >= 0x121 && row <= 0x17e)
row -= 289;
else if (row == 0x221)
row -= 451;
else if (row >= 0x223 && row <= 0x225)
row -= 452;
else if (row == 0x228)
row -= 454;
else if (row >= 0x22c && row <= 0x22f)
row -= 457;
else if (row >= 0x26e && row <= 0x27e)
row -= 519;
else
return 0x0000;
if (col >= 0x21 && col <= 0x7e)
col -= 0x21;
else
return 0x0000;
val = __jisx0213_to_ucs_main[row * 94 + col];
val = __jisx0213_to_ucs_pagestart[val >> 8] + (val & 0xff);
if (val == 0xfffd)
val = 0x0000;
return val;
}
static inline uint16_t
__attribute ((always_inline))
ucs4_to_jisx0213 (uint32_t ucs)
{
if (ucs < NELEMS (__jisx0213_from_ucs_level1) << 6)
{
int index1 = __jisx0213_from_ucs_level1[ucs >> 6];
if (index1 >= 0)
return __jisx0213_from_ucs_level2[(index1 << 6) + (ucs & 0x3f)];
}
return 0x0000;
}
static inline int
__attribute ((always_inline))
jisx0213_added_in_2004_p (uint16_t val)
{
/* From JISX 0213:2000 to JISX 0213:2004, 10 characters were added to
plane 1, and plane 2 was left unchanged. See ISO-IR-233. */
switch (val >> 8)
{
case 0x2e:
return val == 0x2e21;
case 0x2f:
return val == 0x2f7e;
case 0x4f:
return val == 0x4f54 || val == 0x4f7e;
case 0x74:
return val == 0x7427;
case 0x7e:
return val >= 0x7e7a && val <= 0x7e7e;
default:
return 0;
}
}
#endif /* _JISX0213_H */
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