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Commit	Line	Data
	1	/*-
	2	* Copyright (c) 2002-2004 Tim J. Robbins. All rights reserved.
	3	* Copyright (c) 1993
	4	* The Regents of the University of California. All rights reserved.
	5	*
	6	* This code is derived from software contributed to Berkeley by
	7	* Paul Borman at Krystal Technologies.
	8	*
	9	* Redistribution and use in source and binary forms, with or without
	10	* modification, are permitted provided that the following conditions
	11	* are met:
	12	* 1. Redistributions of source code must retain the above copyright
	13	* notice, this list of conditions and the following disclaimer.
	14	* 2. Redistributions in binary form must reproduce the above copyright
	15	* notice, this list of conditions and the following disclaimer in the
	16	* documentation and/or other materials provided with the distribution.
	17	* 3. All advertising materials mentioning features or use of this software
	18	* must display the following acknowledgement:
	19	* This product includes software developed by the University of
	20	* California, Berkeley and its contributors.
	21	* 4. Neither the name of the University nor the names of its contributors
	22	* may be used to endorse or promote products derived from this software
	23	* without specific prior written permission.
	24	*
	25	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	26	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	27	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	28	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	29	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	30	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	31	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	32	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	33	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	34	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	35	* SUCH DAMAGE.
	36	*/
	37
	38	#include <sys/param.h>
	39	__FBSDID("$FreeBSD: src/lib/libc/locale/gbk.c,v 1.11 2004/05/17 11:16:14 tjr Exp $");
	40
	41	#include <errno.h>
	42	#include <runetype.h>
	43	#include <stdlib.h>
	44	#include <string.h>
	45	#include <wchar.h>
	46	#include "mblocal.h"
	47
	48	int _GBK_init(_RuneLocale *);
	49	size_t _GBK_mbrtowc(wchar_t * __restrict, const char * __restrict, size_t,
	50	mbstate_t * __restrict);
	51	int _GBK_mbsinit(const mbstate_t *);
	52	size_t _GBK_wcrtomb(char * __restrict, wchar_t, mbstate_t * __restrict);
	53
	54	typedef struct {
	55	wchar_t ch;
	56	} _GBKState;
	57
	58	int
	59	_GBK_init(_RuneLocale *rl)
	60	{
	61
	62	__mbrtowc = _GBK_mbrtowc;
	63	__wcrtomb = _GBK_wcrtomb;
	64	__mbsinit = _GBK_mbsinit;
	65	_CurrentRuneLocale = rl;
	66	__mb_cur_max = 2;
	67	return (0);
	68	}
	69
	70	int
	71	_GBK_mbsinit(const mbstate_t *ps)
	72	{
	73
	74	return (ps == NULL \|\| ((const _GBKState *)ps)->ch == 0);
	75	}
	76
	77	static __inline int
	78	_gbk_check(u_int c)
	79	{
	80
	81	c &= 0xff;
	82	return ((c >= 0x81 && c <= 0xfe) ? 2 : 1);
	83	}
	84
	85	size_t
	86	_GBK_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s, size_t n,
	87	mbstate_t * __restrict ps)
	88	{
	89	_GBKState *gs;
	90	wchar_t wc;
	91	size_t len;
	92
	93	gs = (_GBKState *)ps;
	94
	95	if ((gs->ch & ~0xFF) != 0) {
	96	/* Bad conversion state. */
	97	errno = EINVAL;
	98	return ((size_t)-1);
	99	}
	100
	101	if (s == NULL) {
	102	s = "";
	103	n = 1;
	104	pwc = NULL;
	105	}
	106
	107	if (n == 0)
	108	/* Incomplete multibyte sequence */
	109	return ((size_t)-2);
	110
	111	if (gs->ch != 0) {
	112	if (*s == '\0') {
	113	errno = EILSEQ;
	114	return ((size_t)-1);
	115	}
	116	wc = (gs->ch << 8) \| (*s & 0xFF);
	117	if (pwc != NULL)
	118	*pwc = wc;
	119	gs->ch = 0;
	120	return (1);
	121	}
	122
	123	len = (size_t)_gbk_check(*s);
	124	wc = *s++ & 0xff;
	125	if (len == 2) {
	126	if (n < 2) {
	127	/* Incomplete multibyte sequence */
	128	gs->ch = wc;
	129	return ((size_t)-2);
	130	}
	131	if (*s == '\0') {
	132	errno = EILSEQ;
	133	return ((size_t)-1);
	134	}
	135	wc = (wc << 8) \| (*s++ & 0xff);
	136	if (pwc != NULL)
	137	*pwc = wc;
	138	return (2);
	139	} else {
	140	if (pwc != NULL)
	141	*pwc = wc;
	142	return (wc == L'\0' ? 0 : 1);
	143	}
	144	}
	145
	146	size_t
	147	_GBK_wcrtomb(char * __restrict s, wchar_t wc, mbstate_t * __restrict ps)
	148	{
	149	_GBKState *gs;
	150
	151	gs = (_GBKState *)ps;
	152
	153	if (gs->ch != 0) {
	154	errno = EINVAL;
	155	return ((size_t)-1);
	156	}
	157
	158	if (s == NULL)
	159	/* Reset to initial shift state (no-op) */
	160	return (1);
	161	if (wc & 0x8000) {
	162	*s++ = (wc >> 8) & 0xff;
	163	*s = wc & 0xff;
	164	return (2);
	165	}
	166	*s = wc & 0xff;
	167	return (1);
	168	}