diff options
Diffstat (limited to 'lib/libiconv_modules/DECHanyu/citrus_dechanyu.c')
-rw-r--r-- | lib/libiconv_modules/DECHanyu/citrus_dechanyu.c | 392 |
1 files changed, 392 insertions, 0 deletions
diff --git a/lib/libiconv_modules/DECHanyu/citrus_dechanyu.c b/lib/libiconv_modules/DECHanyu/citrus_dechanyu.c new file mode 100644 index 0000000..0801ac9 --- /dev/null +++ b/lib/libiconv_modules/DECHanyu/citrus_dechanyu.c @@ -0,0 +1,392 @@ +/* $FreeBSD$ */ +/* $NetBSD: citrus_dechanyu.c,v 1.3 2008/06/14 16:01:07 tnozaki Exp $ */ + +/*- + * Copyright (c)2007 Citrus Project, + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ +#include <sys/cdefs.h> +#include <sys/types.h> + +#include <assert.h> +#include <errno.h> +#include <limits.h> +#include <stddef.h> +#include <stdint.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <wchar.h> + +#include "citrus_namespace.h" +#include "citrus_types.h" +#include "citrus_bcs.h" +#include "citrus_module.h" +#include "citrus_stdenc.h" +#include "citrus_dechanyu.h" + +/* ---------------------------------------------------------------------- + * private stuffs used by templates + */ + +typedef struct { + size_t chlen; + char ch[4]; +} _DECHanyuState; + +typedef struct { + int dummy; +} _DECHanyuEncodingInfo; + +#define _CEI_TO_EI(_cei_) (&(_cei_)->ei) +#define _CEI_TO_STATE(_cei_, _func_) (_cei_)->states.__CONCAT(s_,_func_) + +#define _FUNCNAME(m) __CONCAT(_citrus_DECHanyu_,m) +#define _ENCODING_INFO _DECHanyuEncodingInfo +#define _ENCODING_STATE _DECHanyuState +#define _ENCODING_MB_CUR_MAX(_ei_) 4 +#define _ENCODING_IS_STATE_DEPENDENT 0 +#define _STATE_NEEDS_EXPLICIT_INIT(_ps_) 0 + +static __inline void +/*ARGSUSED*/ +_citrus_DECHanyu_init_state(_DECHanyuEncodingInfo * __restrict ei __unused, + _DECHanyuState * __restrict psenc) +{ + + psenc->chlen = 0; +} + +static __inline void +/*ARGSUSED*/ +_citrus_DECHanyu_pack_state(_DECHanyuEncodingInfo * __restrict ei __unused, + void * __restrict pspriv, const _DECHanyuState * __restrict psenc) +{ + + memcpy(pspriv, (const void *)psenc, sizeof(*psenc)); +} + +static __inline void +/*ARGSUSED*/ +_citrus_DECHanyu_unpack_state(_DECHanyuEncodingInfo * __restrict ei __unused, + _DECHanyuState * __restrict psenc, + const void * __restrict pspriv) +{ + + memcpy((void *)psenc, pspriv, sizeof(*psenc)); +} + +static void +/*ARGSUSED*/ +_citrus_DECHanyu_encoding_module_uninit(_DECHanyuEncodingInfo *ei __unused) +{ + + /* ei may be null */ +} + +static int +/*ARGSUSED*/ +_citrus_DECHanyu_encoding_module_init(_DECHanyuEncodingInfo * __restrict ei __unused, + const void * __restrict var __unused, size_t lenvar __unused) +{ + + /* ei may be null */ + return (0); +} + +static __inline bool +is_singlebyte(int c) +{ + + return (c <= 0x7F); +} + +static __inline bool +is_leadbyte(int c) +{ + + return (c >= 0xA1 && c <= 0xFE); +} + +static __inline bool +is_trailbyte(int c) +{ + + c &= ~0x80; + return (c >= 0x21 && c <= 0x7E); +} + +static __inline bool +is_hanyu1(int c) +{ + + return (c == 0xC2); +} + +static __inline bool +is_hanyu2(int c) +{ + + return (c == 0xCB); +} + +#define HANYUBIT 0xC2CB0000 + +static __inline bool +is_94charset(int c) +{ + + return (c >= 0x21 && c <= 0x7E); +} + +static int +/*ARGSUSED*/ +_citrus_DECHanyu_mbrtowc_priv(_DECHanyuEncodingInfo * __restrict ei, + wchar_t * __restrict pwc, char ** __restrict s, size_t n, + _DECHanyuState * __restrict psenc, size_t * __restrict nresult) +{ + char *s0; + wchar_t wc; + int ch; + + if (*s == NULL) { + _citrus_DECHanyu_init_state(ei, psenc); + *nresult = _ENCODING_IS_STATE_DEPENDENT; + return (0); + } + s0 = *s; + + wc = (wchar_t)0; + switch (psenc->chlen) { + case 0: + if (n-- < 1) + goto restart; + ch = *s0++ & 0xFF; + if (is_singlebyte(ch)) { + if (pwc != NULL) + *pwc = (wchar_t)ch; + *nresult = (size_t)((ch == 0) ? 0 : 1); + *s = s0; + return (0); + } + if (!is_leadbyte(ch)) + goto ilseq; + psenc->ch[psenc->chlen++] = ch; + break; + case 1: + ch = psenc->ch[0] & 0xFF; + if (!is_leadbyte(ch)) + return (EINVAL); + break; + case 2: case 3: + ch = psenc->ch[0] & 0xFF; + if (is_hanyu1(ch)) { + ch = psenc->ch[1] & 0xFF; + if (is_hanyu2(ch)) { + wc |= (wchar_t)HANYUBIT; + break; + } + } + /*FALLTHROUGH*/ + default: + return (EINVAL); + } + + switch (psenc->chlen) { + case 1: + if (is_hanyu1(ch)) { + if (n-- < 1) + goto restart; + ch = *s0++ & 0xFF; + if (!is_hanyu2(ch)) + goto ilseq; + psenc->ch[psenc->chlen++] = ch; + wc |= (wchar_t)HANYUBIT; + if (n-- < 1) + goto restart; + ch = *s0++ & 0xFF; + if (!is_leadbyte(ch)) + goto ilseq; + psenc->ch[psenc->chlen++] = ch; + } + break; + case 2: + if (n-- < 1) + goto restart; + ch = *s0++ & 0xFF; + if (!is_leadbyte(ch)) + goto ilseq; + psenc->ch[psenc->chlen++] = ch; + break; + case 3: + ch = psenc->ch[2] & 0xFF; + if (!is_leadbyte(ch)) + return (EINVAL); + } + if (n-- < 1) + goto restart; + wc |= (wchar_t)(ch << 8); + ch = *s0++ & 0xFF; + if (!is_trailbyte(ch)) + goto ilseq; + wc |= (wchar_t)ch; + if (pwc != NULL) + *pwc = wc; + *nresult = (size_t)(s0 - *s); + *s = s0; + psenc->chlen = 0; + + return (0); + +restart: + *nresult = (size_t)-2; + *s = s0; + return (0); + +ilseq: + *nresult = (size_t)-1; + return (EILSEQ); +} + +static int +/*ARGSUSED*/ +_citrus_DECHanyu_wcrtomb_priv(_DECHanyuEncodingInfo * __restrict ei __unused, + char * __restrict s, size_t n, wchar_t wc, + _DECHanyuState * __restrict psenc, size_t * __restrict nresult) +{ + int ch; + + if (psenc->chlen != 0) + return (EINVAL); + + /* XXX: assume wchar_t as int */ + if ((uint32_t)wc <= 0x7F) { + ch = wc & 0xFF; + } else { + if ((uint32_t)wc > 0xFFFF) { + if ((wc & ~0xFFFF) != (wchar_t)HANYUBIT) + goto ilseq; + psenc->ch[psenc->chlen++] = (wc >> 24) & 0xFF; + psenc->ch[psenc->chlen++] = (wc >> 16) & 0xFF; + wc &= 0xFFFF; + } + ch = (wc >> 8) & 0xFF; + if (!is_leadbyte(ch)) + goto ilseq; + psenc->ch[psenc->chlen++] = ch; + ch = wc & 0xFF; + if (!is_trailbyte(ch)) + goto ilseq; + } + psenc->ch[psenc->chlen++] = ch; + if (n < psenc->chlen) { + *nresult = (size_t)-1; + return (E2BIG); + } + memcpy(s, psenc->ch, psenc->chlen); + *nresult = psenc->chlen; + psenc->chlen = 0; + + return (0); + +ilseq: + *nresult = (size_t)-1; + return (EILSEQ); +} + +static __inline int +/*ARGSUSED*/ +_citrus_DECHanyu_stdenc_wctocs(_DECHanyuEncodingInfo * __restrict ei __unused, + _csid_t * __restrict csid, _index_t * __restrict idx, wchar_t wc) +{ + wchar_t mask; + int plane; + + plane = 0; + mask = 0x7F; + /* XXX: assume wchar_t as int */ + if ((uint32_t)wc > 0x7F) { + if ((uint32_t)wc > 0xFFFF) { + if ((wc & ~0xFFFF) != (wchar_t)HANYUBIT) + return (EILSEQ); + plane += 2; + } + if (!is_leadbyte((wc >> 8) & 0xFF) || + !is_trailbyte(wc & 0xFF)) + return (EILSEQ); + plane += (wc & 0x80) ? 1 : 2; + mask |= 0x7F00; + } + *csid = plane; + *idx = (_index_t)(wc & mask); + + return (0); +} + +static __inline int +/*ARGSUSED*/ +_citrus_DECHanyu_stdenc_cstowc(_DECHanyuEncodingInfo * __restrict ei __unused, + wchar_t * __restrict wc, _csid_t csid, _index_t idx) +{ + + if (csid == 0) { + if (idx > 0x7F) + return (EILSEQ); + } else if (csid <= 4) { + if (!is_94charset(idx >> 8)) + return (EILSEQ); + if (!is_94charset(idx & 0xFF)) + return (EILSEQ); + if (csid % 2) + idx |= 0x80; + idx |= 0x8000; + if (csid > 2) + idx |= HANYUBIT; + } else + return (EILSEQ); + *wc = (wchar_t)idx; + return (0); +} + +static __inline int +/*ARGSUSED*/ +_citrus_DECHanyu_stdenc_get_state_desc_generic( + _DECHanyuEncodingInfo * __restrict ei __unused, + _DECHanyuState * __restrict psenc, int * __restrict rstate) +{ + + *rstate = (psenc->chlen == 0) + ? _STDENC_SDGEN_INITIAL + : _STDENC_SDGEN_INCOMPLETE_CHAR; + return (0); +} + +/* ---------------------------------------------------------------------- + * public interface for stdenc + */ + +_CITRUS_STDENC_DECLS(DECHanyu); +_CITRUS_STDENC_DEF_OPS(DECHanyu); + +#include "citrus_stdenc_template.h" |