/* Access functions for CNS 11643, plane 2 handling. Copyright (C) 1998, 1999 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 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 Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with the GNU C Library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include <stdint.h> #include <gconv.h> /* Table for CNS 11643, plane 2 to UCS4 conversion. */ extern const uint16_t __cns11643l2_to_ucs4_tab[]; static inline uint32_t cns11643l2_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 || (ch - offset) > 0x7d) return __UNKNOWN_10646_CHAR; if (avail < 2) return 0; ch2 = (*s)[1]; if ((ch2 - offset) <= 0x20 || (ch2 - offset) >= 0x7f) return __UNKNOWN_10646_CHAR; idx = (ch - 0x21 - offset) * 94 + (ch2 - 0x21 - offset); if (idx > 0x1de1) return __UNKNOWN_10646_CHAR; (*s) += 2; return __cns11643l2_to_ucs4_tab[idx] ?: ((*s) -= 2, __UNKNOWN_10646_CHAR); } /* The table which contains the CNS 11643 level 2 mappings. */ extern const char __cns11643_from_ucs4_tab[][3]; static inline size_t ucs4_to_cns11643l2 (uint32_t wch, unsigned char *s, size_t avail) { unsigned int ch = (unsigned int) wch; const char *cp = NULL; if (ch >= 0x4e07 && ch <= 0x9fa4) { cp = __cns11643_from_ucs4_tab[ch - 0x4e00]; if (cp[0] == '\2') ++cp; else cp = NULL; } if (cp == NULL) return __UNKNOWN_10646_CHAR; if (avail < 2) return 0; s[0] = cp[0]; s[1] = cp[1]; return 2; }