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Diffstat (limited to 'REORG.TODO/iconvdata/ksc5601.h')
| -rw-r--r-- | REORG.TODO/iconvdata/ksc5601.h | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/REORG.TODO/iconvdata/ksc5601.h b/REORG.TODO/iconvdata/ksc5601.h new file mode 100644 index 0000000000..9a740bdaee --- /dev/null +++ b/REORG.TODO/iconvdata/ksc5601.h @@ -0,0 +1,195 @@ +/* Access functions for KS C 5601-1992 based encoding conversion. + Copyright (C) 1998-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + 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 + <http://www.gnu.org/licenses/>. */ + +#ifndef _KSC5601_H +#define _KSC5601_H 1 + +#define KSC5601_HANGUL 2350 +#define KSC5601_HANJA 4888 +#define KSC5601_SYMBOL 989 + +#include <gconv.h> +#include <stdint.h> + +/* Structure to map from UCS to KSC. This structure should be packed + on all platforms. */ +struct map +{ + uint16_t ucs; + char val[2]; +}; + +/* Conversion table. */ +extern const uint16_t __ksc5601_hangul_to_ucs[KSC5601_HANGUL]; +extern const uint16_t __ksc5601_sym_to_ucs[]; +extern const struct map __ksc5601_sym_from_ucs[KSC5601_SYMBOL]; +extern const uint16_t __ksc5601_hanja_to_ucs[KSC5601_HANJA]; +extern const struct map __ksc5601_hanja_from_ucs[KSC5601_HANJA]; + + +static inline uint32_t +__attribute ((always_inline)) +ksc5601_to_ucs4 (const unsigned char **s, size_t avail, unsigned char offset) +{ + unsigned char ch = **s; + unsigned char ch2; + int idx; + + /* row 94(0x7e) and row 41(0x49) are user-defined area in KS C 5601 */ + + if (ch < offset || (ch - offset) <= 0x20 || (ch - offset) >= 0x7e + || (ch - offset) == 0x49) + return __UNKNOWN_10646_CHAR; + + if (avail < 2) + return 0; + + ch2 = (*s)[1]; + if (ch2 < offset || (ch2 - offset) <= 0x20 || (ch2 - offset) >= 0x7f) + return __UNKNOWN_10646_CHAR; + + idx = (ch - offset - 0x21) * 94 + (ch2 - offset - 0x21); + + /* 1410 = 15 * 94 , 3760 = 40 * 94 + Hangul in KS C 5601 : row 16 - row 40 */ + + *s += 2; + + if (idx >= 1410 && idx < 1410 + KSC5601_HANGUL) + return (__ksc5601_hangul_to_ucs[idx - 1410] + ?: (*s -= 2, __UNKNOWN_10646_CHAR)); + else if (idx >= 3854) + /* Hanja : row 42 - row 93 : 3854 = 94 * (42-1) */ + return (__ksc5601_hanja_to_ucs[idx - 3854] + ?: (*s -= 2, __UNKNOWN_10646_CHAR)); + else if (idx <= 1114) + return __ksc5601_sym_to_ucs[idx] ?: (*s -= 2, __UNKNOWN_10646_CHAR); + + *s -= 2; + return __UNKNOWN_10646_CHAR; +} + +static inline size_t +__attribute ((always_inline)) +ucs4_to_ksc5601_hangul (uint32_t wch, unsigned char *s, size_t avail) +{ + int l = 0; + int u = KSC5601_HANGUL - 1; + uint32_t try; + + while (l <= u) + { + int m = (l + u) / 2; + try = (uint32_t) __ksc5601_hangul_to_ucs[m]; + if (try > wch) + u = m - 1; + else if (try < wch) + l= m + 1; + else + { + if (avail < 2) + return 0; + + s[0] = (m / 94) + 0x30; + s[1] = (m % 94) + 0x21; + + return 2; + } + } + + return __UNKNOWN_10646_CHAR; +} + + +static inline size_t +__attribute ((always_inline)) +ucs4_to_ksc5601_hanja (uint32_t wch, unsigned char *s, size_t avail) +{ + int l = 0; + int u = KSC5601_HANJA - 1; + uint32_t try; + + while (l <= u) + { + int m = (l + u) / 2; + try = (uint32_t) __ksc5601_hanja_from_ucs[m].ucs; + if (try > wch) + u=m-1; + else if (try < wch) + l = m + 1; + else + { + if (avail < 2) + return 0; + + s[0] = __ksc5601_hanja_from_ucs[m].val[0]; + s[1] = __ksc5601_hanja_from_ucs[m].val[1]; + + return 2; + } + } + + return __UNKNOWN_10646_CHAR; +} + +static inline size_t +__attribute ((always_inline)) +ucs4_to_ksc5601_sym (uint32_t wch, unsigned char *s, size_t avail) +{ + int l = 0; + int u = KSC5601_SYMBOL - 1; + uint32_t try; + + while (l <= u) + { + int m = (l + u) / 2; + try = __ksc5601_sym_from_ucs[m].ucs; + if (try > wch) + u = m - 1; + else if (try < wch) + l = m + 1; + else + { + if (avail < 2) + return 0; + + s[0] = __ksc5601_sym_from_ucs[m].val[0]; + s[1] = __ksc5601_sym_from_ucs[m].val[1]; + + return 2; + } + } + + return __UNKNOWN_10646_CHAR; +} + + +static inline size_t +__attribute ((always_inline)) +ucs4_to_ksc5601 (uint32_t wch, unsigned char *s, size_t avail) +{ + if (wch >= 0xac00 && wch <= 0xd7a3) + return ucs4_to_ksc5601_hangul (wch, s, avail); + else if ((wch >= 0x4e00 && wch <= 0x9fff) + || (wch >= 0xf900 && wch <= 0xfa0b)) + return ucs4_to_ksc5601_hanja (wch, s, avail); + else + return ucs4_to_ksc5601_sym (wch, s, avail); +} + +#endif /* ksc5601.h */ |