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/* Access functions for JISX0208 conversion. Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. 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 _JIS0208_H #define _JIS0208_H 1 #include <gconv.h> #include <stdint.h> /* Struct for table with indeces in UCS mapping table. */ struct jisx0208_ucs_idx { uint16_t start; uint16_t end; uint16_t idx; }; /* Conversion table. */ extern const uint16_t __jis0208_to_ucs[]; extern const char __jisx0208_from_ucs4_lat1[256][2]; extern const char __jisx0208_from_ucs4_greek[0xc1][2]; extern const struct jisx0208_ucs_idx __jisx0208_from_ucs_idx[]; extern const char __jisx0208_from_ucs_tab[][2]; static inline uint32_t jisx0208_to_ucs4 (const unsigned char **s, size_t avail, unsigned char offset) { unsigned char ch = *(*s); unsigned char ch2; int idx; if (ch < offset || (ch - offset) <= 0x20) 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 - 0x21 - offset) * 94 + (ch2 - 0x21 - offset); if (idx >= 0x1e80) return __UNKNOWN_10646_CHAR; (*s) += 2; return __jis0208_to_ucs[idx] ?: ((*s) -= 2, __UNKNOWN_10646_CHAR); } static inline size_t ucs4_to_jisx0208 (uint32_t wch, char *s, size_t avail) { unsigned int ch = (unsigned int) wch; const char *cp; if (avail < 2) return 0; if (ch < 0x100) cp = __jisx0208_from_ucs4_lat1[ch]; else if (ch >= 0x391 && ch <= 0x451) cp = __jisx0208_from_ucs4_greek[ch - 0x391]; else { const struct jisx0208_ucs_idx *rp = __jisx0208_from_ucs_idx; if (ch >= 0xffff) return __UNKNOWN_10646_CHAR; while (ch > rp->end) ++rp; if (ch >= rp->start) cp = __jisx0208_from_ucs_tab[rp->idx + ch - rp->start]; else return __UNKNOWN_10646_CHAR; } if (cp[0] == '\0') return __UNKNOWN_10646_CHAR; s[0] = cp[0]; s[1] = cp[1]; return 2; } #endif /* jis0208.h */