ad30f8e79b
setting. It can be built by setting the WITH_ICONV knob. While this knob is unset, the library part, the binaries, the header file and the metadata files will not be built or installed so it makes no impact on the system if left turned off. This work is based on the iconv implementation in NetBSD but a great number of improvements and feature additions have been included: - Some utilities have been added. There is a conversion table generator, which can compare conversion tables to reference data generated by GNU libiconv. This helps ensuring conversion compatibility. - UTF-16 surrogate support and some endianness issues have been fixed. - The rather chaotic Makefiles to build metadata have been refactored and cleaned up, now it is easy to read and it is also easier to add support for new encodings. - A bunch of new encodings and encoding aliases have been added. - Support for 1->2, 1->3 and 1->4 mappings, which is needed for transliterating with flying accents as GNU does, like "u. - Lots of warnings have been fixed, the major part of the code is now WARNS=6 clean. - New section 1 and section 5 manual pages have been added. - Some GNU-specific calls have been implemented: iconvlist(), iconvctl(), iconv_canonicalize(), iconv_open_into() - Support for GNU's //IGNORE suffix has been added. - The "-" argument for stdin is now recognized in iconv(1) as per POSIX. - The Big5 conversion module has been fixed. - The iconv.h header files is supposed to be compatible with the GNU version, i.e. sources should build with base iconv.h and GNU libiconv. It also includes a macro magic to deal with the char ** and const char ** incompatibility. - GNU compatibility: "" or "char" means the current local encoding in use - Various cleanups and style(9) fixes. Approved by: delphij (mentor) Obtained from: The NetBSD Project Sponsored by: Google Summer of Code 2009
418 lines
8.4 KiB
C
418 lines
8.4 KiB
C
/* $FreeBSD$ */
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/* $NetBSD: citrus_gbk2k.c,v 1.7 2008/06/14 16:01:07 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/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 <stdbool.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_bcs.h"
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#include "citrus_module.h"
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#include "citrus_stdenc.h"
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#include "citrus_gbk2k.h"
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/* ----------------------------------------------------------------------
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* private stuffs used by templates
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*/
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typedef struct _GBK2KState {
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int chlen;
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char ch[4];
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} _GBK2KState;
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typedef struct {
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int mb_cur_max;
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} _GBK2KEncodingInfo;
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#define _CEI_TO_EI(_cei_) (&(_cei_)->ei)
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#define _CEI_TO_STATE(_cei_, _func_) (_cei_)->states.s_##_func_
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#define _FUNCNAME(m) _citrus_GBK2K_##m
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#define _ENCODING_INFO _GBK2KEncodingInfo
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#define _ENCODING_STATE _GBK2KState
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#define _ENCODING_MB_CUR_MAX(_ei_) (_ei_)->mb_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_GBK2K_init_state(_GBK2KEncodingInfo * __restrict ei __unused,
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_GBK2KState * __restrict s)
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{
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memset(s, 0, sizeof(*s));
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}
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static __inline void
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/*ARGSUSED*/
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_citrus_GBK2K_pack_state(_GBK2KEncodingInfo * __restrict ei __unused,
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void * __restrict pspriv, const _GBK2KState * __restrict s)
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{
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memcpy(pspriv, (const void *)s, sizeof(*s));
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}
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static __inline void
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/*ARGSUSED*/
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_citrus_GBK2K_unpack_state(_GBK2KEncodingInfo * __restrict ei __unused,
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_GBK2KState * __restrict s, const void * __restrict pspriv)
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{
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memcpy((void *)s, pspriv, sizeof(*s));
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}
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static __inline bool
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_mb_singlebyte(int c)
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{
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return ((c & 0xff) <= 0x7f);
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}
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static __inline bool
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_mb_leadbyte(int c)
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{
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c &= 0xff;
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return (0x81 <= c && c <= 0xfe);
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}
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static __inline bool
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_mb_trailbyte(int c)
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{
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c &= 0xff;
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return ((0x40 <= c && c <= 0x7e) || (0x80 <= c && c <= 0xfe));
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}
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static __inline bool
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_mb_surrogate(int c)
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{
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c &= 0xff;
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return (0x30 <= c && c <= 0x39);
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}
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static __inline int
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_mb_count(wchar_t v)
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{
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uint32_t c;
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c = (uint32_t)v; /* XXX */
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if (!(c & 0xffffff00))
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return (1);
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if (!(c & 0xffff0000))
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return (2);
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return (4);
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}
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#define _PSENC (psenc->ch[psenc->chlen - 1])
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#define _PUSH_PSENC(c) (psenc->ch[psenc->chlen++] = (c))
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static int
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_citrus_GBK2K_mbrtowc_priv(_GBK2KEncodingInfo * __restrict ei,
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wchar_t * __restrict pwc, char ** __restrict s, size_t n,
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_GBK2KState * __restrict psenc, size_t * __restrict nresult)
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{
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char *s0, *s1;
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wchar_t wc;
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int chlenbak, len;
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s0 = *s;
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if (s0 == NULL) {
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/* _citrus_GBK2K_init_state(ei, psenc); */
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psenc->chlen = 0;
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*nresult = 0;
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return (0);
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}
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chlenbak = psenc->chlen;
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switch (psenc->chlen) {
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case 3:
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if (!_mb_leadbyte (_PSENC))
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goto invalid;
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/* FALLTHROUGH */
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case 2:
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if (!_mb_surrogate(_PSENC) || _mb_trailbyte(_PSENC))
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goto invalid;
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/* FALLTHROUGH */
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case 1:
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if (!_mb_leadbyte (_PSENC))
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goto invalid;
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/* FALLTHOROUGH */
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case 0:
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break;
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default:
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goto invalid;
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}
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for (;;) {
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if (n-- < 1)
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goto restart;
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_PUSH_PSENC(*s0++);
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switch (psenc->chlen) {
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case 1:
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if (_mb_singlebyte(_PSENC))
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goto convert;
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if (_mb_leadbyte (_PSENC))
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continue;
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goto ilseq;
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case 2:
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if (_mb_trailbyte (_PSENC))
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goto convert;
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if (ei->mb_cur_max == 4 &&
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_mb_surrogate (_PSENC))
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continue;
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goto ilseq;
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case 3:
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if (_mb_leadbyte (_PSENC))
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continue;
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goto ilseq;
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case 4:
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if (_mb_surrogate (_PSENC))
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goto convert;
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goto ilseq;
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}
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}
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convert:
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len = psenc->chlen;
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s1 = &psenc->ch[0];
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wc = 0;
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while (len-- > 0)
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wc = (wc << 8) | (*s1++ & 0xff);
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if (pwc != NULL)
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*pwc = wc;
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*s = s0;
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*nresult = (wc == 0) ? 0 : psenc->chlen - chlenbak;
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/* _citrus_GBK2K_init_state(ei, psenc); */
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psenc->chlen = 0;
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return (0);
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restart:
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*s = s0;
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*nresult = (size_t)-2;
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return (0);
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invalid:
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return (EINVAL);
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ilseq:
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*nresult = (size_t)-1;
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return (EILSEQ);
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}
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static int
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_citrus_GBK2K_wcrtomb_priv(_GBK2KEncodingInfo * __restrict ei,
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char * __restrict s, size_t n, wchar_t wc, _GBK2KState * __restrict psenc,
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size_t * __restrict nresult)
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{
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size_t len;
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int ret;
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if (psenc->chlen != 0) {
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ret = EINVAL;
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goto err;
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}
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len = _mb_count(wc);
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if (n < len) {
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ret = E2BIG;
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goto err;
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}
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switch (len) {
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case 1:
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if (!_mb_singlebyte(_PUSH_PSENC(wc ))) {
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ret = EILSEQ;
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goto err;
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}
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break;
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case 2:
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if (!_mb_leadbyte (_PUSH_PSENC(wc >> 8)) ||
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!_mb_trailbyte (_PUSH_PSENC(wc))) {
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ret = EILSEQ;
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goto err;
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}
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break;
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case 4:
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if (ei->mb_cur_max != 4 ||
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!_mb_leadbyte (_PUSH_PSENC(wc >> 24)) ||
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!_mb_surrogate (_PUSH_PSENC(wc >> 16)) ||
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!_mb_leadbyte (_PUSH_PSENC(wc >> 8)) ||
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!_mb_surrogate (_PUSH_PSENC(wc))) {
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ret = EILSEQ;
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goto err;
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}
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break;
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}
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memcpy(s, psenc->ch, psenc->chlen);
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*nresult = psenc->chlen;
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/* _citrus_GBK2K_init_state(ei, psenc); */
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psenc->chlen = 0;
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return (0);
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err:
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*nresult = (size_t)-1;
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return (ret);
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}
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static __inline int
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/*ARGSUSED*/
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_citrus_GBK2K_stdenc_wctocs(_GBK2KEncodingInfo * __restrict ei __unused,
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_csid_t * __restrict csid, _index_t * __restrict idx, wchar_t wc)
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{
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uint8_t ch, cl;
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if ((uint32_t)wc < 0x80) {
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/* ISO646 */
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*csid = 0;
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*idx = (_index_t)wc;
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} else if ((uint32_t)wc >= 0x10000) {
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/* GBKUCS : XXX */
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*csid = 3;
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*idx = (_index_t)wc;
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} else {
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ch = (uint8_t)(wc >> 8);
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cl = (uint8_t)wc;
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if (ch >= 0xA1 && cl >= 0xA1) {
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/* EUC G1 */
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*csid = 1;
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*idx = (_index_t)wc & 0x7F7FU;
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} else {
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/* extended area (0x8140-) */
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*csid = 2;
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*idx = (_index_t)wc;
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}
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}
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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_GBK2K_stdenc_cstowc(_GBK2KEncodingInfo * __restrict ei,
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wchar_t * __restrict wc, _csid_t csid, _index_t idx)
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{
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switch (csid) {
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case 0:
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/* ISO646 */
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*wc = (wchar_t)idx;
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break;
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case 1:
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/* EUC G1 */
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*wc = (wchar_t)idx | 0x8080U;
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break;
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case 2:
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/* extended area */
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*wc = (wchar_t)idx;
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break;
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case 3:
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/* GBKUCS : XXX */
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if (ei->mb_cur_max != 4)
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return (EINVAL);
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*wc = (wchar_t)idx;
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break;
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default:
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return (EILSEQ);
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}
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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_GBK2K_stdenc_get_state_desc_generic(_GBK2KEncodingInfo * __restrict ei __unused,
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_GBK2KState * __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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static int
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/*ARGSUSED*/
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_citrus_GBK2K_encoding_module_init(_GBK2KEncodingInfo * __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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memset((void *)ei, 0, sizeof(*ei));
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ei->mb_cur_max = 4;
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while (lenvar > 0) {
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switch (_bcs_tolower(*p)) {
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case '2':
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MATCH("2byte", ei->mb_cur_max = 2);
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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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return (0);
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}
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static void
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/*ARGSUSED*/
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_citrus_GBK2K_encoding_module_uninit(_GBK2KEncodingInfo *ei __unused)
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{
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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(GBK2K);
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_CITRUS_STDENC_DEF_OPS(GBK2K);
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#include "citrus_stdenc_template.h"
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