103 lines
2.8 KiB
C
103 lines
2.8 KiB
C
/* Functions for JISX0213 conversion.
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Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Bruno Haible <bruno@clisp.org>, 2002.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef _JISX0213_H
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#define _JISX0213_H 1
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#include <stdint.h>
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extern const uint16_t __jisx0213_to_ucs_combining[][2];
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extern const uint16_t __jisx0213_to_ucs_main[120 * 94];
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extern const uint32_t __jisx0213_to_ucs_pagestart[];
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extern const int16_t __jisx0213_from_ucs_level1[2715];
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extern const uint16_t __jisx0213_from_ucs_level2[];
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#define NELEMS(arr) (sizeof (arr) / sizeof (arr[0]))
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static inline uint32_t
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__attribute ((always_inline))
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jisx0213_to_ucs4 (unsigned int row, unsigned int col)
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{
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uint32_t val;
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if (row >= 0x121 && row <= 0x17e)
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row -= 289;
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else if (row == 0x221)
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row -= 451;
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else if (row >= 0x223 && row <= 0x225)
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row -= 452;
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else if (row == 0x228)
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row -= 454;
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else if (row >= 0x22c && row <= 0x22f)
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row -= 457;
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else if (row >= 0x26e && row <= 0x27e)
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row -= 519;
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else
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return 0x0000;
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if (col >= 0x21 && col <= 0x7e)
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col -= 0x21;
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else
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return 0x0000;
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val = __jisx0213_to_ucs_main[row * 94 + col];
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val = __jisx0213_to_ucs_pagestart[val >> 8] + (val & 0xff);
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if (val == 0xfffd)
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val = 0x0000;
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return val;
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}
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static inline uint16_t
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__attribute ((always_inline))
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ucs4_to_jisx0213 (uint32_t ucs)
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{
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if (ucs < NELEMS (__jisx0213_from_ucs_level1) << 6)
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{
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int index1 = __jisx0213_from_ucs_level1[ucs >> 6];
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if (index1 >= 0)
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return __jisx0213_from_ucs_level2[(index1 << 6) + (ucs & 0x3f)];
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}
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return 0x0000;
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}
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static inline int
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__attribute ((always_inline))
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jisx0213_added_in_2004_p (uint16_t val)
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{
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/* From JISX 0213:2000 to JISX 0213:2004, 10 characters were added to
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plane 1, and plane 2 was left unchanged. See ISO-IR-233. */
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switch (val >> 8)
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{
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case 0x2e:
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return val == 0x2e21;
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case 0x2f:
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return val == 0x2f7e;
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case 0x4f:
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return val == 0x4f54 || val == 0x4f7e;
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case 0x74:
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return val == 0x7427;
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case 0x7e:
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return val >= 0x7e7a && val <= 0x7e7e;
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default:
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return 0;
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}
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}
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#endif /* _JISX0213_H */
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