/* Access functions for GB2312 conversion. 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 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 _GB2312_H #define _GB2312_H 1 #include <gconv.h> #include <stdint.h> #include <assert.h> /* Conversion table. */ extern const uint16_t __gb2312_to_ucs[]; static inline uint32_t gb2312_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) > 0x77) 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 > 0x1ff1) return __UNKNOWN_10646_CHAR; (*s) += 2; return __gb2312_to_ucs[idx] ?: ((*s) -= 2, __UNKNOWN_10646_CHAR); } extern const char __gb2312_from_ucs4_tab1[][2]; extern const char __gb2312_from_ucs4_tab2[][2]; extern const char __gb2312_from_ucs4_tab3[][2]; extern const char __gb2312_from_ucs4_tab4[][2]; extern const char __gb2312_from_ucs4_tab5[][2]; extern const char __gb2312_from_ucs4_tab6[][2]; extern const char __gb2312_from_ucs4_tab7[][2]; extern const char __gb2312_from_ucs4_tab8[][2]; extern const char __gb2312_from_ucs4_tab9[][2]; static inline size_t ucs4_to_gb2312 (uint32_t wch, unsigned char *s, size_t avail) { unsigned int ch = (unsigned int) wch; char buf[2]; const char *cp = buf; switch (ch) { case 0xa4 ... 0x101: cp = __gb2312_from_ucs4_tab1[ch - 0xa4]; break; case 0x113: cp = "\x28\x25"; break; case 0x11b: cp = "\x28\x27"; break; case 0x12b: cp = "\x28\x29"; break; case 0x14d: cp = "\x28\x2d"; break; case 0x16b: cp = "\x28\x31"; break; case 0x1ce: cp = "\x28\x23"; break; case 0x1d0: cp = "\x28\x2b"; break; case 0x1d2: cp = "\x28\x2f"; break; case 0x1d4: cp = "\x28\x33"; break; case 0x1d6: cp = "\x28\x35"; break; case 0x1d8: cp = "\x28\x36"; break; case 0x1da: cp = "\x28\x37"; break; case 0x1dc: cp = "\x28\x38"; break; case 0x2c7: cp = "\x21\x26"; break; case 0x2c9: cp = "\x21\x25"; break; case 0x391 ... 0x3c9: cp = __gb2312_from_ucs4_tab2[ch - 0x391]; break; case 0x401 ... 0x451: cp = __gb2312_from_ucs4_tab3[ch - 0x401]; break; case 0x2015 ... 0x203b: cp = __gb2312_from_ucs4_tab4[ch - 0x2015]; break; case 0x2103 ... 0x22a5: cp = __gb2312_from_ucs4_tab5[ch - 0x2103]; break; case 0x2312: cp = "\x21\x50"; break; case 0x2460 ... 0x249b: cp = __gb2312_from_ucs4_tab6[ch - 0x2460]; break; case 0x2500 ... 0x254b: buf[0] = '\x29'; buf[1] = '\x24' + (ch % 256); break; case 0x25a0: cp = "\x21\x76"; break; case 0x25a1: cp = "\x21\x75"; break; case 0x25b2: cp = "\x21\x78"; break; case 0x25b3: cp = "\x21\x77"; break; case 0x25c6: cp = "\x21\x74"; break; case 0x25c7: cp = "\x21\x73"; break; case 0x25cb: cp = "\x21\x70"; break; case 0x25ce: cp = "\x21\x72"; break; case 0x25cf: cp = "\x21\x71"; break; case 0x2605: cp = "\x21\x6f"; break; case 0x2606: cp = "\x21\x6e"; break; case 0x2640: cp = "\x21\x62"; break; case 0x2642: cp = "\x21\x61"; break; case 0x3000 ... 0x3129: cp = __gb2312_from_ucs4_tab7[ch - 0x3000]; break; case 0x3220 ... 0x3229: buf[0] = '\x22'; buf[1] = '\x65' + (ch - 0x3220); break; case 0x4e00 ... 0x9fa0: cp = __gb2312_from_ucs4_tab8[ch - 0x4e00]; break; case 0xff01 ... 0xff5e: cp = __gb2312_from_ucs4_tab9[ch - 0xff01]; break; case 0xffe0: cp = "\x21\x69"; break; case 0xffe1: cp = "\x21\x6a"; break; case 0xffe3: cp = "\x23\x7e"; break; case 0xffe5: cp = "\x23\x24"; break; default: return __UNKNOWN_10646_CHAR; } if (cp[0] == '\0') return __UNKNOWN_10646_CHAR; assert (cp[1] != '\0'); if (avail < 2) return 0; s[0] = cp[0]; s[1] = cp[1]; return 2; } #endif /* gb2312.h */