487 lines
10 KiB
C
487 lines
10 KiB
C
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/* $NetBSD: citrus_utf1632.c,v 1.11 2010/03/20 18:15:32 tnozaki Exp $ */
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/*-
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* Copyright (c)2003 Citrus Project,
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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__RCSID("$NetBSD: citrus_utf1632.c,v 1.11 2010/03/20 18:15:32 tnozaki Exp $");
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#endif /* LIBC_SCCS and not lint */
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#include <assert.h>
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#include <errno.h>
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stddef.h>
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#include <limits.h>
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#include <wchar.h>
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#include <sys/types.h>
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#include <machine/endian.h>
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#include "citrus_namespace.h"
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#include "citrus_types.h"
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#include "citrus_module.h"
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#include "citrus_stdenc.h"
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#include "citrus_bcs.h"
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#include "citrus_utf1632.h"
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/* ----------------------------------------------------------------------
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* private stuffs used by templates
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*/
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typedef struct {
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u_int8_t ch[4];
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int chlen;
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int current_endian;
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} _UTF1632State;
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typedef struct {
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int preffered_endian;
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unsigned int cur_max;
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#define _ENDIAN_UNKNOWN 0
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#define _ENDIAN_BIG 1
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#define _ENDIAN_LITTLE 2
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u_int32_t mode;
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#define _MODE_UTF32 0x00000001U
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#define _MODE_FORCE_ENDIAN 0x00000002U
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} _UTF1632EncodingInfo;
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#define _FUNCNAME(m) _citrus_UTF1632_##m
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#define _ENCODING_INFO _UTF1632EncodingInfo
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#define _ENCODING_STATE _UTF1632State
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#define _ENCODING_MB_CUR_MAX(_ei_) ((_ei_)->cur_max)
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#define _ENCODING_IS_STATE_DEPENDENT 0
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#define _STATE_NEEDS_EXPLICIT_INIT(_ps_) 0
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static __inline void
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/*ARGSUSED*/
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_citrus_UTF1632_init_state(_UTF1632EncodingInfo *ei, _UTF1632State *s)
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{
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memset(s, 0, sizeof(*s));
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}
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static int
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_citrus_UTF1632_mbrtowc_priv(_UTF1632EncodingInfo *ei, wchar_t *pwc,
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const char **s, size_t n, _UTF1632State *psenc,
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size_t *nresult)
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{
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int chlenbak, endian, needlen;
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wchar_t wc;
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size_t result;
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const char *s0;
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_DIAGASSERT(nresult != 0);
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_DIAGASSERT(ei != NULL);
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_DIAGASSERT(s != NULL);
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_DIAGASSERT(psenc != NULL);
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s0 = *s;
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if (s0 == NULL) {
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_citrus_UTF1632_init_state(ei, psenc);
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*nresult = 0; /* state independent */
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return (0);
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}
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result = 0;
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chlenbak = psenc->chlen;
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refetch:
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if ((ei->mode & _MODE_UTF32) != 0 || chlenbak>=2)
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needlen = 4;
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else
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needlen = 2;
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while (chlenbak < needlen) {
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if (n==0)
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goto restart;
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psenc->ch[chlenbak++] = *s0++;
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n--;
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result++;
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}
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if (psenc->current_endian == _ENDIAN_UNKNOWN) {
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if ((ei->mode & _MODE_FORCE_ENDIAN) == 0) {
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/* judge endian marker */
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if ((ei->mode & _MODE_UTF32) == 0) {
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/* UTF16 */
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if (psenc->ch[0]==0xFE && psenc->ch[1]==0xFF) {
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psenc->current_endian = _ENDIAN_BIG;
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chlenbak = 0;
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goto refetch;
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} else if (psenc->ch[0]==0xFF && psenc->ch[1]==0xFE) {
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psenc->current_endian = _ENDIAN_LITTLE;
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chlenbak = 0;
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goto refetch;
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}
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} else {
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/* UTF32 */
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if (psenc->ch[0]==0x00 && psenc->ch[1]==0x00 &&
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psenc->ch[2]==0xFE && psenc->ch[3]==0xFF) {
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psenc->current_endian = _ENDIAN_BIG;
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chlenbak = 0;
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goto refetch;
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} else if (psenc->ch[0]==0xFF && psenc->ch[1]==0xFE &&
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psenc->ch[2]==0x00 && psenc->ch[3]==0x00) {
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psenc->current_endian = _ENDIAN_LITTLE;
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chlenbak = 0;
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goto refetch;
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}
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}
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}
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psenc->current_endian = ei->preffered_endian;
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}
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endian = psenc->current_endian;
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/* get wc */
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if ((ei->mode & _MODE_UTF32) == 0) {
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/* UTF16 */
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if (needlen==2) {
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switch (endian) {
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case _ENDIAN_LITTLE:
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wc = (psenc->ch[0] |
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((wchar_t)psenc->ch[1] << 8));
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break;
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case _ENDIAN_BIG:
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wc = (psenc->ch[1] |
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((wchar_t)psenc->ch[0] << 8));
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break;
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default:
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goto ilseq;
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}
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if (wc >= 0xD800 && wc <= 0xDBFF) {
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/* surrogate high */
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needlen=4;
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goto refetch;
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}
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} else {
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/* surrogate low */
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wc -= 0xD800; /* wc : surrogate high (see above) */
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wc <<= 10;
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switch (endian) {
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case _ENDIAN_LITTLE:
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if (psenc->ch[3]<0xDC || psenc->ch[3]>0xDF)
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goto ilseq;
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wc |= psenc->ch[2];
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wc |= (wchar_t)(psenc->ch[3] & 3) << 8;
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break;
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case _ENDIAN_BIG:
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if (psenc->ch[2]<0xDC || psenc->ch[2]>0xDF)
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goto ilseq;
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wc |= psenc->ch[3];
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wc |= (wchar_t)(psenc->ch[2] & 3) << 8;
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break;
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default:
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goto ilseq;
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}
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wc += 0x10000;
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}
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} else {
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/* UTF32 */
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switch (endian) {
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case _ENDIAN_LITTLE:
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wc = (psenc->ch[0] |
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((wchar_t)psenc->ch[1] << 8) |
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((wchar_t)psenc->ch[2] << 16) |
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((wchar_t)psenc->ch[3] << 24));
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break;
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case _ENDIAN_BIG:
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wc = (psenc->ch[3] |
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((wchar_t)psenc->ch[2] << 8) |
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((wchar_t)psenc->ch[1] << 16) |
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((wchar_t)psenc->ch[0] << 24));
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break;
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default:
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goto ilseq;
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}
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if (wc >= 0xD800 && wc <= 0xDFFF)
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goto ilseq;
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}
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*pwc = wc;
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psenc->chlen = 0;
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*nresult = result;
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*s = s0;
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return (0);
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ilseq:
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*nresult = (size_t)-1;
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psenc->chlen = 0;
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return (EILSEQ);
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restart:
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*nresult = (size_t)-2;
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psenc->chlen = chlenbak;
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*s = s0;
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return (0);
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}
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static int
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_citrus_UTF1632_wcrtomb_priv(_UTF1632EncodingInfo *ei, char *s, size_t n,
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wchar_t wc, _UTF1632State *psenc,
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size_t *nresult)
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{
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int ret;
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wchar_t wc2;
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static const char _bom[4] = {
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#if BYTE_ORDER == BIG_ENDIAN
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0x00, 0x00, 0xFE, 0xFF,
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#else
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0xFF, 0xFE, 0x00, 0x00,
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#endif
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};
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const char *bom = &_bom[0];
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size_t cnt;
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_DIAGASSERT(ei != NULL);
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_DIAGASSERT(nresult != 0);
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_DIAGASSERT(s != NULL);
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cnt = (size_t)0;
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if (psenc->current_endian == _ENDIAN_UNKNOWN) {
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if ((ei->mode & _MODE_FORCE_ENDIAN) == 0) {
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if (ei->mode & _MODE_UTF32) {
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cnt = 4;
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} else {
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cnt = 2;
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#if BYTE_ORDER == BIG_ENDIAN
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bom += 2;
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#endif
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}
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if (n < cnt)
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goto e2big;
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memcpy(s, bom, cnt);
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s += cnt, n -= cnt;
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}
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psenc->current_endian = ei->preffered_endian;
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}
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wc2 = 0;
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if ((ei->mode & _MODE_UTF32)==0) {
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/* UTF16 */
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if (wc>0xFFFF) {
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/* surrogate */
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if (wc>0x10FFFF)
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goto ilseq;
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if (n < 4)
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goto e2big;
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cnt += 4;
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wc -= 0x10000;
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wc2 = (wc & 0x3FF) | 0xDC00;
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wc = (wc>>10) | 0xD800;
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} else {
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if (n < 2)
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goto e2big;
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cnt += 2;
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}
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surrogate:
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switch (psenc->current_endian) {
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case _ENDIAN_BIG:
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s[1] = wc;
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s[0] = (wc >>= 8);
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break;
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case _ENDIAN_LITTLE:
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s[0] = wc;
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s[1] = (wc >>= 8);
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break;
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}
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if (wc2!=0) {
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wc = wc2;
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wc2 = 0;
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s += 2;
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goto surrogate;
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}
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} else {
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/* UTF32 */
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if (wc >= 0xD800 && wc <= 0xDFFF)
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goto ilseq;
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if (n < 4)
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goto e2big;
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cnt += 4;
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switch (psenc->current_endian) {
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case _ENDIAN_BIG:
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s[3] = wc;
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s[2] = (wc >>= 8);
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s[1] = (wc >>= 8);
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s[0] = (wc >>= 8);
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break;
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case _ENDIAN_LITTLE:
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s[0] = wc;
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s[1] = (wc >>= 8);
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s[2] = (wc >>= 8);
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s[3] = (wc >>= 8);
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break;
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}
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}
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*nresult = cnt;
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return 0;
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ilseq:
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*nresult = (size_t)-1;
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return EILSEQ;
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e2big:
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*nresult = (size_t)-1;
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return E2BIG;
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}
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static void
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parse_variable(_UTF1632EncodingInfo * __restrict ei,
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const void * __restrict var, size_t lenvar)
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{
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#define MATCH(x, act) \
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do { \
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if (lenvar >= (sizeof(#x)-1) && \
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_bcs_strncasecmp(p, #x, sizeof(#x)-1) == 0) { \
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act; \
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lenvar -= sizeof(#x)-1; \
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p += sizeof(#x)-1; \
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} \
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} while (/*CONSTCOND*/0)
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const char *p;
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|
p = var;
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||
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|
while (lenvar>0) {
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||
|
|
switch (*p) {
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||
|
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case 'B':
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||
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case 'b':
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||
|
|
MATCH(big, ei->preffered_endian = _ENDIAN_BIG);
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||
|
|
break;
|
||
|
|
case 'L':
|
||
|
|
case 'l':
|
||
|
|
MATCH(little, ei->preffered_endian = _ENDIAN_LITTLE);
|
||
|
|
break;
|
||
|
|
case 'F':
|
||
|
|
case 'f':
|
||
|
|
MATCH(force, ei->mode |= _MODE_FORCE_ENDIAN);
|
||
|
|
break;
|
||
|
|
case 'U':
|
||
|
|
case 'u':
|
||
|
|
MATCH(utf32, ei->mode |= _MODE_UTF32);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
p++;
|
||
|
|
lenvar--;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static int
|
||
|
|
/*ARGSUSED*/
|
||
|
|
_citrus_UTF1632_encoding_module_init(_UTF1632EncodingInfo * __restrict ei,
|
||
|
|
const void * __restrict var,
|
||
|
|
size_t lenvar)
|
||
|
|
{
|
||
|
|
_DIAGASSERT(ei != NULL);
|
||
|
|
|
||
|
|
memset((void *)ei, 0, sizeof(*ei));
|
||
|
|
|
||
|
|
parse_variable(ei, var, lenvar);
|
||
|
|
|
||
|
|
if ((ei->mode&_MODE_UTF32)==0)
|
||
|
|
ei->cur_max = 6; /* endian + surrogate */
|
||
|
|
else
|
||
|
|
ei->cur_max = 8; /* endian + normal */
|
||
|
|
|
||
|
|
if (ei->preffered_endian == _ENDIAN_UNKNOWN) {
|
||
|
|
#if BYTE_ORDER == BIG_ENDIAN
|
||
|
|
ei->preffered_endian = _ENDIAN_BIG;
|
||
|
|
#else
|
||
|
|
ei->preffered_endian = _ENDIAN_LITTLE;
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
return (0);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
/*ARGSUSED*/
|
||
|
|
_citrus_UTF1632_encoding_module_uninit(_UTF1632EncodingInfo *ei)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
static __inline int
|
||
|
|
/*ARGSUSED*/
|
||
|
|
_citrus_UTF1632_stdenc_wctocs(_UTF1632EncodingInfo * __restrict ei,
|
||
|
|
_csid_t * __restrict csid,
|
||
|
|
_index_t * __restrict idx,
|
||
|
|
_wc_t wc)
|
||
|
|
{
|
||
|
|
|
||
|
|
_DIAGASSERT(csid != NULL && idx != NULL);
|
||
|
|
|
||
|
|
*csid = 0;
|
||
|
|
*idx = (_index_t)wc;
|
||
|
|
|
||
|
|
return (0);
|
||
|
|
}
|
||
|
|
|
||
|
|
static __inline int
|
||
|
|
/*ARGSUSED*/
|
||
|
|
_citrus_UTF1632_stdenc_cstowc(_UTF1632EncodingInfo * __restrict ei,
|
||
|
|
_wc_t * __restrict wc,
|
||
|
|
_csid_t csid, _index_t idx)
|
||
|
|
{
|
||
|
|
|
||
|
|
_DIAGASSERT(wc != NULL);
|
||
|
|
|
||
|
|
if (csid != 0)
|
||
|
|
return (EILSEQ);
|
||
|
|
|
||
|
|
*wc = (_wc_t)idx;
|
||
|
|
|
||
|
|
return (0);
|
||
|
|
}
|
||
|
|
|
||
|
|
static __inline int
|
||
|
|
/*ARGSUSED*/
|
||
|
|
_citrus_UTF1632_stdenc_get_state_desc_generic(_UTF1632EncodingInfo * __restrict ei,
|
||
|
|
_UTF1632State * __restrict psenc,
|
||
|
|
int * __restrict rstate)
|
||
|
|
{
|
||
|
|
|
||
|
|
if (psenc->chlen == 0)
|
||
|
|
*rstate = _STDENC_SDGEN_INITIAL;
|
||
|
|
else
|
||
|
|
*rstate = _STDENC_SDGEN_INCOMPLETE_CHAR;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* ----------------------------------------------------------------------
|
||
|
|
* public interface for stdenc
|
||
|
|
*/
|
||
|
|
|
||
|
|
_CITRUS_STDENC_DECLS(UTF1632);
|
||
|
|
_CITRUS_STDENC_DEF_OPS(UTF1632);
|
||
|
|
|
||
|
|
#include "citrus_stdenc_template.h"
|