/* Access functions for KS C 5601-1992 based encoding conversion. Copyright (C) 1998, 1999, 2000 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, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ #ifndef _KSC5601_H #define _KSC5601_H 1 #define KSC5601_HANGUL 2350 #define KSC5601_HANJA 4888 #define KSC5601_SYMBOL 988 #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 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 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 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 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 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 */