diff options
Diffstat (limited to 'lib/libiconv_modules/ZW/citrus_zw.c')
| -rw-r--r-- | lib/libiconv_modules/ZW/citrus_zw.c | 455 |
1 files changed, 455 insertions, 0 deletions
diff --git a/lib/libiconv_modules/ZW/citrus_zw.c b/lib/libiconv_modules/ZW/citrus_zw.c new file mode 100644 index 0000000..d57661f --- /dev/null +++ b/lib/libiconv_modules/ZW/citrus_zw.c @@ -0,0 +1,455 @@ +/* $FreeBSD$ */ +/* $NetBSD: citrus_zw.c,v 1.4 2008/06/14 16:01:08 tnozaki Exp $ */ + +/*- + * Copyright (c)2004, 2006 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 <stdio.h> +#include <stdint.h> +#include <stdlib.h> +#include <string.h> +#include <wchar.h> + +#include "citrus_namespace.h" +#include "citrus_types.h" +#include "citrus_module.h" +#include "citrus_stdenc.h" +#include "citrus_zw.h" + +/* ---------------------------------------------------------------------- + * private stuffs used by templates + */ + +typedef struct { + int dummy; +} _ZWEncodingInfo; + +typedef enum { + NONE, AMBIGIOUS, ASCII, GB2312 +} _ZWCharset; + +typedef struct { + _ZWCharset charset; + int chlen; + char ch[4]; +} _ZWState; + +#define _CEI_TO_EI(_cei_) (&(_cei_)->ei) +#define _CEI_TO_STATE(_cei_, _func_) (_cei_)->states.s_##_func_ + +#define _FUNCNAME(m) _citrus_ZW_##m +#define _ENCODING_INFO _ZWEncodingInfo +#define _ENCODING_STATE _ZWState +#define _ENCODING_MB_CUR_MAX(_ei_) MB_LEN_MAX +#define _ENCODING_IS_STATE_DEPENDENT 1 +#define _STATE_NEEDS_EXPLICIT_INIT(_ps_) ((_ps_)->charset != NONE) + +static __inline void +/*ARGSUSED*/ +_citrus_ZW_init_state(_ZWEncodingInfo * __restrict ei __unused, + _ZWState * __restrict psenc) +{ + + psenc->chlen = 0; + psenc->charset = NONE; +} + +static __inline void +/*ARGSUSED*/ +_citrus_ZW_pack_state(_ZWEncodingInfo * __restrict ei __unused, + void *__restrict pspriv, const _ZWState * __restrict psenc) +{ + + memcpy(pspriv, (const void *)psenc, sizeof(*psenc)); +} + +static __inline void +/*ARGSUSED*/ +_citrus_ZW_unpack_state(_ZWEncodingInfo * __restrict ei __unused, + _ZWState * __restrict psenc, const void * __restrict pspriv) +{ + + memcpy((void *)psenc, pspriv, sizeof(*psenc)); +} + +static int +_citrus_ZW_mbrtowc_priv(_ZWEncodingInfo * __restrict ei, + wchar_t * __restrict pwc, char **__restrict s, size_t n, + _ZWState * __restrict psenc, size_t * __restrict nresult) +{ + char *s0; + wchar_t wc; + int ch, len; + + if (*s == NULL) { + _citrus_ZW_init_state(ei, psenc); + *nresult = (size_t)_ENCODING_IS_STATE_DEPENDENT; + return (0); + } + s0 = *s; + len = 0; + +#define STORE \ +do { \ + if (n-- < 1) { \ + *nresult = (size_t)-2; \ + *s = s0; \ + return (0); \ + } \ + ch = (unsigned char)*s0++; \ + if (len++ > MB_LEN_MAX || ch > 0x7F)\ + goto ilseq; \ + psenc->ch[psenc->chlen++] = ch; \ +} while (/*CONSTCOND*/0) + +loop: + switch (psenc->charset) { + case ASCII: + switch (psenc->chlen) { + case 0: + STORE; + switch (psenc->ch[0]) { + case '\0': case '\n': + psenc->charset = NONE; + } + /*FALLTHROUGH*/ + case 1: + break; + default: + return (EINVAL); + } + ch = (unsigned char)psenc->ch[0]; + if (ch > 0x7F) + goto ilseq; + wc = (wchar_t)ch; + psenc->chlen = 0; + break; + case NONE: + if (psenc->chlen != 0) + return (EINVAL); + STORE; + ch = (unsigned char)psenc->ch[0]; + if (ch != 'z') { + if (ch != '\n' && ch != '\0') + psenc->charset = ASCII; + wc = (wchar_t)ch; + psenc->chlen = 0; + break; + } + psenc->charset = AMBIGIOUS; + psenc->chlen = 0; + /* FALLTHROUGH */ + case AMBIGIOUS: + if (psenc->chlen != 0) + return (EINVAL); + STORE; + if (psenc->ch[0] != 'W') { + psenc->charset = ASCII; + wc = L'z'; + break; + } + psenc->charset = GB2312; + psenc->chlen = 0; + /* FALLTHROUGH */ + case GB2312: + switch (psenc->chlen) { + case 0: + STORE; + ch = (unsigned char)psenc->ch[0]; + if (ch == '\0') { + psenc->charset = NONE; + wc = (wchar_t)ch; + psenc->chlen = 0; + break; + } else if (ch == '\n') { + psenc->charset = NONE; + psenc->chlen = 0; + goto loop; + } + /*FALLTHROUGH*/ + case 1: + STORE; + if (psenc->ch[0] == ' ') { + ch = (unsigned char)psenc->ch[1]; + wc = (wchar_t)ch; + psenc->chlen = 0; + break; + } else if (psenc->ch[0] == '#') { + ch = (unsigned char)psenc->ch[1]; + if (ch == '\n') { + psenc->charset = NONE; + wc = (wchar_t)ch; + psenc->chlen = 0; + break; + } else if (ch == ' ') { + wc = (wchar_t)ch; + psenc->chlen = 0; + break; + } + } + ch = (unsigned char)psenc->ch[0]; + if (ch < 0x21 || ch > 0x7E) + goto ilseq; + wc = (wchar_t)(ch << 8); + ch = (unsigned char)psenc->ch[1]; + if (ch < 0x21 || ch > 0x7E) { +ilseq: + *nresult = (size_t)-1; + return (EILSEQ); + } + wc |= (wchar_t)ch; + psenc->chlen = 0; + break; + default: + return (EINVAL); + } + break; + default: + return (EINVAL); + } + if (pwc != NULL) + *pwc = wc; + + *nresult = (size_t)(wc == 0 ? 0 : len); + *s = s0; + + return (0); +} + +static int +/*ARGSUSED*/ +_citrus_ZW_wcrtomb_priv(_ZWEncodingInfo * __restrict ei __unused, + char *__restrict s, size_t n, wchar_t wc, + _ZWState * __restrict psenc, size_t * __restrict nresult) +{ + int ch; + + if (psenc->chlen != 0) + return (EINVAL); + if ((uint32_t)wc <= 0x7F) { + ch = (unsigned char)wc; + switch (psenc->charset) { + case NONE: + if (ch == '\0' || ch == '\n') + psenc->ch[psenc->chlen++] = ch; + else { + if (n < 4) + return (E2BIG); + n -= 4; + psenc->ch[psenc->chlen++] = 'z'; + psenc->ch[psenc->chlen++] = 'W'; + psenc->ch[psenc->chlen++] = ' '; + psenc->ch[psenc->chlen++] = ch; + psenc->charset = GB2312; + } + break; + case GB2312: + if (n < 2) + return (E2BIG); + n -= 2; + if (ch == '\0') { + psenc->ch[psenc->chlen++] = '\n'; + psenc->ch[psenc->chlen++] = '\0'; + psenc->charset = NONE; + } else if (ch == '\n') { + psenc->ch[psenc->chlen++] = '#'; + psenc->ch[psenc->chlen++] = '\n'; + psenc->charset = NONE; + } else { + psenc->ch[psenc->chlen++] = ' '; + psenc->ch[psenc->chlen++] = ch; + } + break; + default: + return (EINVAL); + } + } else if ((uint32_t)wc <= 0x7E7E) { + switch (psenc->charset) { + case NONE: + if (n < 2) + return (E2BIG); + n -= 2; + psenc->ch[psenc->chlen++] = 'z'; + psenc->ch[psenc->chlen++] = 'W'; + psenc->charset = GB2312; + /* FALLTHROUGH*/ + case GB2312: + if (n < 2) + return (E2BIG); + n -= 2; + ch = (wc >> 8) & 0xFF; + if (ch < 0x21 || ch > 0x7E) + goto ilseq; + psenc->ch[psenc->chlen++] = ch; + ch = wc & 0xFF; + if (ch < 0x21 || ch > 0x7E) + goto ilseq; + psenc->ch[psenc->chlen++] = ch; + break; + default: + return (EINVAL); + } + } else { +ilseq: + *nresult = (size_t)-1; + return (EILSEQ); + } + memcpy(s, psenc->ch, psenc->chlen); + *nresult = psenc->chlen; + psenc->chlen = 0; + + return (0); +} + +static int +/*ARGSUSED*/ +_citrus_ZW_put_state_reset(_ZWEncodingInfo * __restrict ei __unused, + char * __restrict s, size_t n, _ZWState * __restrict psenc, + size_t * __restrict nresult) +{ + + if (psenc->chlen != 0) + return (EINVAL); + switch (psenc->charset) { + case GB2312: + if (n-- < 1) + return (E2BIG); + psenc->ch[psenc->chlen++] = '\n'; + psenc->charset = NONE; + /*FALLTHROUGH*/ + case NONE: + *nresult = psenc->chlen; + if (psenc->chlen > 0) { + memcpy(s, psenc->ch, psenc->chlen); + psenc->chlen = 0; + } + break; + default: + return (EINVAL); + } + + return (0); +} + +static __inline int +/*ARGSUSED*/ +_citrus_ZW_stdenc_get_state_desc_generic(_ZWEncodingInfo * __restrict ei __unused, + _ZWState * __restrict psenc, int * __restrict rstate) +{ + + switch (psenc->charset) { + case NONE: + if (psenc->chlen != 0) + return (EINVAL); + *rstate = _STDENC_SDGEN_INITIAL; + break; + case AMBIGIOUS: + if (psenc->chlen != 0) + return (EINVAL); + *rstate = _STDENC_SDGEN_INCOMPLETE_SHIFT; + break; + case ASCII: + case GB2312: + switch (psenc->chlen) { + case 0: + *rstate = _STDENC_SDGEN_STABLE; + break; + case 1: + *rstate = (psenc->ch[0] == '#') ? + _STDENC_SDGEN_INCOMPLETE_SHIFT : + _STDENC_SDGEN_INCOMPLETE_CHAR; + break; + default: + return (EINVAL); + } + break; + default: + return (EINVAL); + } + return (0); +} + +static __inline int +/*ARGSUSED*/ +_citrus_ZW_stdenc_wctocs(_ZWEncodingInfo * __restrict ei __unused, + _csid_t * __restrict csid, _index_t * __restrict idx, wchar_t wc) +{ + + *csid = (_csid_t)(wc <= (wchar_t)0x7FU) ? 0 : 1; + *idx = (_index_t)wc; + + return (0); +} + +static __inline int +/*ARGSUSED*/ +_citrus_ZW_stdenc_cstowc(_ZWEncodingInfo * __restrict ei __unused, + wchar_t * __restrict wc, _csid_t csid, _index_t idx) +{ + + switch (csid) { + case 0: case 1: + break; + default: + return (EINVAL); + } + *wc = (wchar_t)idx; + + return (0); +} + +static void +/*ARGSUSED*/ +_citrus_ZW_encoding_module_uninit(_ZWEncodingInfo *ei __unused) +{ + +} + +static int +/*ARGSUSED*/ +_citrus_ZW_encoding_module_init(_ZWEncodingInfo * __restrict ei __unused, + const void *__restrict var __unused, size_t lenvar __unused) +{ + + return (0); +} + +/* ---------------------------------------------------------------------- + * public interface for stdenc + */ + +_CITRUS_STDENC_DECLS(ZW); +_CITRUS_STDENC_DEF_OPS(ZW); + +#include "citrus_stdenc_template.h" |
