b0813ee288
http://pubs.opengroup.org/onlinepubs/9699919799/functions/iconv.html Adjust all code that calls iconv. PR: 199099 Exp-run by: antoine MFC after: 2 weeks
454 lines
9.8 KiB
C
454 lines
9.8 KiB
C
/* $FreeBSD$ */
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/* $NetBSD: citrus_utf1632.c,v 1.9 2008/06/14 16:01:08 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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#include <sys/endian.h>
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#include <sys/types.h>
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#include <assert.h>
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#include <errno.h>
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#include <limits.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <wchar.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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int chlen;
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int current_endian;
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uint8_t ch[4];
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} _UTF1632State;
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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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#if BYTE_ORDER == BIG_ENDIAN
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#define _ENDIAN_INTERNAL _ENDIAN_BIG
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#define _ENDIAN_SWAPPED _ENDIAN_LITTLE
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#else
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#define _ENDIAN_INTERNAL _ENDIAN_LITTLE
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#define _ENDIAN_SWAPPED _ENDIAN_BIG
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#endif
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#define _MODE_UTF32 0x00000001U
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#define _MODE_FORCE_ENDIAN 0x00000002U
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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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uint32_t mode;
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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 __unused,
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_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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char **s, size_t n, _UTF1632State *psenc, size_t *nresult)
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{
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char *s0;
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size_t result;
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wchar_t wc = L'\0';
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int chlenbak, endian, needlen;
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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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needlen = ((ei->mode & _MODE_UTF32) != 0 || chlenbak >= 2) ? 4 : 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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/* 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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endian = ((ei->mode & _MODE_FORCE_ENDIAN) != 0 ||
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psenc->current_endian == _ENDIAN_UNKNOWN) ? ei->preffered_endian :
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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, size_t *nresult)
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{
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wchar_t wc2;
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static const char _bom[4] = {
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0x00, 0x00, 0xFE, 0xFF,
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};
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const char *bom = &_bom[0];
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size_t cnt;
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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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bom += 2;
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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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const char *p;
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p = var;
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while (lenvar > 0) {
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switch (*p) {
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case 'B':
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case 'b':
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MATCH(big, ei->preffered_endian = _ENDIAN_BIG);
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break;
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case 'L':
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case 'l':
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MATCH(little, ei->preffered_endian = _ENDIAN_LITTLE);
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break;
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case 'i':
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case 'I':
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MATCH(internal, ei->preffered_endian = _ENDIAN_INTERNAL);
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break;
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case 's':
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case 'S':
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MATCH(swapped, ei->preffered_endian = _ENDIAN_SWAPPED);
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break;
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case 'F':
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case 'f':
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MATCH(force, ei->mode |= _MODE_FORCE_ENDIAN);
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break;
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case 'U':
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case 'u':
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MATCH(utf32, ei->mode |= _MODE_UTF32);
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break;
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}
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p++;
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lenvar--;
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}
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}
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static int
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/*ARGSUSED*/
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_citrus_UTF1632_encoding_module_init(_UTF1632EncodingInfo * __restrict ei,
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const void * __restrict var, size_t lenvar)
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{
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memset((void *)ei, 0, sizeof(*ei));
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parse_variable(ei, var, lenvar);
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ei->cur_max = ((ei->mode&_MODE_UTF32) == 0) ? 6 : 8;
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/* 6: endian + surrogate */
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/* 8: endian + normal */
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if (ei->preffered_endian == _ENDIAN_UNKNOWN) {
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ei->preffered_endian = _ENDIAN_BIG;
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}
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return (0);
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}
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static void
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/*ARGSUSED*/
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_citrus_UTF1632_encoding_module_uninit(_UTF1632EncodingInfo *ei __unused)
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{
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}
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static __inline int
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/*ARGSUSED*/
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_citrus_UTF1632_stdenc_wctocs(_UTF1632EncodingInfo * __restrict ei __unused,
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_csid_t * __restrict csid, _index_t * __restrict idx, _wc_t wc)
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{
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*csid = 0;
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*idx = (_index_t)wc;
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return (0);
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}
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static __inline int
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/*ARGSUSED*/
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_citrus_UTF1632_stdenc_cstowc(_UTF1632EncodingInfo * __restrict ei __unused,
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_wc_t * __restrict wc, _csid_t csid, _index_t idx)
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{
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if (csid != 0)
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return (EILSEQ);
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*wc = (_wc_t)idx;
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return (0);
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}
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static __inline int
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/*ARGSUSED*/
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_citrus_UTF1632_stdenc_get_state_desc_generic(_UTF1632EncodingInfo * __restrict ei __unused,
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_UTF1632State * __restrict psenc, int * __restrict rstate)
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{
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*rstate = (psenc->chlen == 0) ? _STDENC_SDGEN_INITIAL :
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_STDENC_SDGEN_INCOMPLETE_CHAR;
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return (0);
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}
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/* ----------------------------------------------------------------------
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* public interface for stdenc
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*/
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_CITRUS_STDENC_DECLS(UTF1632);
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_CITRUS_STDENC_DEF_OPS(UTF1632);
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#include "citrus_stdenc_template.h"
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