1 /*- 2 * Copyright (c) 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Paul Borman at Krystal Technologies. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * $DragonFly: src/lib/libc/locale/Attic/gbk.c,v 1.2 2003/12/02 14:56:28 eirikn Exp $ 36 */ 37 38 #include <sys/cdefs.h> 39 40 #include <rune.h> 41 #include <stdlib.h> 42 #include <sys/types.h> 43 44 rune_t _GBK_sgetrune(const char *, size_t, char const **); 45 int _GBK_sputrune(rune_t, char *, size_t, char **); 46 47 int 48 _GBK_init(rl) 49 _RuneLocale *rl; 50 { 51 rl->sgetrune = _GBK_sgetrune; 52 rl->sputrune = _GBK_sputrune; 53 _CurrentRuneLocale = rl; 54 __mb_cur_max = 2; 55 return (0); 56 } 57 58 static inline int 59 _gbk_check(c) 60 u_int c; 61 { 62 c &= 0xff; 63 return ((c >= 0x80 && c <= 0xfe) ? 2 : 1); 64 } 65 66 rune_t 67 _GBK_sgetrune(string, n, result) 68 const char *string; 69 size_t n; 70 char const **result; 71 { 72 rune_t rune = 0; 73 int len; 74 75 if (n < 1 || (len = _gbk_check(*string)) > n) { 76 if (result) 77 *result = string; 78 return (_INVALID_RUNE); 79 } 80 while (--len >= 0) 81 rune = (rune << 8) | ((u_int)(*string++) & 0xff); 82 if (result) 83 *result = string; 84 return rune; 85 } 86 87 int 88 _GBK_sputrune(c, string, n, result) 89 rune_t c; 90 char *string, **result; 91 size_t n; 92 { 93 if (c & 0x8000) { 94 if (n >= 2) { 95 string[0] = (c >> 8) & 0xff; 96 string[1] = c & 0xff; 97 if (result) 98 *result = string + 2; 99 return (2); 100 } 101 } 102 else { 103 if (n >= 1) { 104 *string = c & 0xff; 105 if (result) 106 *result = string + 1; 107 return (1); 108 } 109 } 110 if (result) 111 *result = string; 112 return (0); 113 114 } 115 116