diff options
Diffstat (limited to 'lib/libiconv_modules/EUC/citrus_euc.c')
-rw-r--r-- | lib/libiconv_modules/EUC/citrus_euc.c | 385 |
1 files changed, 385 insertions, 0 deletions
diff --git a/lib/libiconv_modules/EUC/citrus_euc.c b/lib/libiconv_modules/EUC/citrus_euc.c new file mode 100644 index 000000000000..708473bf7641 --- /dev/null +++ b/lib/libiconv_modules/EUC/citrus_euc.c @@ -0,0 +1,385 @@ +/* $FreeBSD$ */ +/* $NetBSD: citrus_euc.c,v 1.14 2009/01/11 02:46:24 christos Exp $ */ + +/*- + * Copyright (c)2002 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. + */ + +/*- + * Copyright (c) 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Paul Borman at Krystal Technologies. + * + * 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. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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 <stdlib.h> +#include <string.h> +#include <wchar.h> + +#include "citrus_namespace.h" +#include "citrus_bcs.h" +#include "citrus_types.h" +#include "citrus_module.h" +#include "citrus_stdenc.h" +#include "citrus_euc.h" + + +/* ---------------------------------------------------------------------- + * private stuffs used by templates + */ + +typedef struct { + int chlen; + char ch[3]; +} _EUCState; + +typedef struct { + wchar_t bits[4]; + wchar_t mask; + unsigned count[4]; + unsigned mb_cur_max; +} _EUCEncodingInfo; + +#define _SS2 0x008e +#define _SS3 0x008f + +#define _CEI_TO_EI(_cei_) (&(_cei_)->ei) +#define _CEI_TO_STATE(_cei_, _func_) (_cei_)->states.s_##_func_ + +#define _FUNCNAME(m) _citrus_EUC_##m +#define _ENCODING_INFO _EUCEncodingInfo +#define _ENCODING_STATE _EUCState +#define _ENCODING_MB_CUR_MAX(_ei_) (_ei_)->mb_cur_max +#define _ENCODING_IS_STATE_DEPENDENT 0 +#define _STATE_NEEDS_EXPLICIT_INIT(_ps_) 0 + + +static __inline int +_citrus_EUC_cs(unsigned int c) +{ + + c &= 0xff; + + return ((c & 0x80) ? c == _SS3 ? 3 : c == _SS2 ? 2 : 1 : 0); +} + +static __inline int +_citrus_EUC_parse_variable(_EUCEncodingInfo *ei, const void *var, + size_t lenvar __unused) +{ + char *e; + const char *v; + int x; + + /* parse variable string */ + if (!var) + return (EFTYPE); + + v = (const char *)var; + + while (*v == ' ' || *v == '\t') + ++v; + + ei->mb_cur_max = 1; + for (x = 0; x < 4; ++x) { + ei->count[x] = (int)_bcs_strtol(v, (char **)&e, 0); + if (v == e || !(v = e) || ei->count[x] < 1 || ei->count[x] > 4) { + return (EFTYPE); + } + if (ei->mb_cur_max < ei->count[x]) + ei->mb_cur_max = ei->count[x]; + while (*v == ' ' || *v == '\t') + ++v; + ei->bits[x] = (int)_bcs_strtol(v, (char **)&e, 0); + if (v == e || !(v = e)) { + return (EFTYPE); + } + while (*v == ' ' || *v == '\t') + ++v; + } + ei->mask = (int)_bcs_strtol(v, (char **)&e, 0); + if (v == e || !(v = e)) { + return (EFTYPE); + } + + return (0); +} + + +static __inline void +/*ARGSUSED*/ +_citrus_EUC_init_state(_EUCEncodingInfo *ei __unused, _EUCState *s) +{ + + memset(s, 0, sizeof(*s)); +} + +static __inline void +/*ARGSUSED*/ +_citrus_EUC_pack_state(_EUCEncodingInfo *ei __unused, void *pspriv, + const _EUCState *s) +{ + + memcpy(pspriv, (const void *)s, sizeof(*s)); +} + +static __inline void +/*ARGSUSED*/ +_citrus_EUC_unpack_state(_EUCEncodingInfo *ei __unused, _EUCState *s, + const void *pspriv) +{ + + memcpy((void *)s, pspriv, sizeof(*s)); +} + +static int +_citrus_EUC_mbrtowc_priv(_EUCEncodingInfo *ei, wchar_t *pwc, char **s, + size_t n, _EUCState *psenc, size_t *nresult) +{ + wchar_t wchar; + int c, chlenbak, cs, len; + char *s0, *s1 = NULL; + + s0 = *s; + + if (s0 == NULL) { + _citrus_EUC_init_state(ei, psenc); + *nresult = 0; /* state independent */ + return (0); + } + + chlenbak = psenc->chlen; + + /* make sure we have the first byte in the buffer */ + switch (psenc->chlen) { + case 0: + if (n < 1) + goto restart; + psenc->ch[0] = *s0++; + psenc->chlen = 1; + n--; + break; + case 1: + case 2: + break; + default: + /* illgeal state */ + goto encoding_error; + } + + c = ei->count[cs = _citrus_EUC_cs(psenc->ch[0] & 0xff)]; + if (c == 0) + goto encoding_error; + while (psenc->chlen < c) { + if (n < 1) + goto restart; + psenc->ch[psenc->chlen] = *s0++; + psenc->chlen++; + n--; + } + *s = s0; + + switch (cs) { + case 3: + case 2: + /* skip SS2/SS3 */ + len = c - 1; + s1 = &psenc->ch[1]; + break; + case 1: + case 0: + len = c; + s1 = &psenc->ch[0]; + break; + default: + goto encoding_error; + } + wchar = 0; + while (len-- > 0) + wchar = (wchar << 8) | (*s1++ & 0xff); + wchar = (wchar & ~ei->mask) | ei->bits[cs]; + + psenc->chlen = 0; + if (pwc) + *pwc = wchar; + *nresult = wchar ? (size_t)(c - chlenbak) : 0; + return (0); + +encoding_error: + psenc->chlen = 0; + *nresult = (size_t)-1; + return (EILSEQ); + +restart: + *nresult = (size_t)-2; + *s = s0; + return (0); +} + +static int +_citrus_EUC_wcrtomb_priv(_EUCEncodingInfo *ei, char *s, size_t n, wchar_t wc, + _EUCState *psenc __unused, size_t *nresult) +{ + wchar_t m, nm; + unsigned int cs; + int ret; + short i; + + m = wc & ei->mask; + nm = wc & ~m; + + for (cs = 0; cs < sizeof(ei->count) / sizeof(ei->count[0]); cs++) + if (m == ei->bits[cs]) + break; + /* fallback case - not sure if it is necessary */ + if (cs == sizeof(ei->count) / sizeof(ei->count[0])) + cs = 1; + + i = ei->count[cs]; + if (n < (unsigned)i) { + ret = E2BIG; + goto err; + } + m = (cs) ? 0x80 : 0x00; + switch (cs) { + case 2: + *s++ = _SS2; + i--; + break; + case 3: + *s++ = _SS3; + i--; + break; + } + + while (i-- > 0) + *s++ = ((nm >> (i << 3)) & 0xff) | m; + + *nresult = (size_t)ei->count[cs]; + return (0); + +err: + *nresult = (size_t)-1; + return (ret); +} + +static __inline int +/*ARGSUSED*/ +_citrus_EUC_stdenc_wctocs(_EUCEncodingInfo * __restrict ei, + _csid_t * __restrict csid, _index_t * __restrict idx, wchar_t wc) +{ + wchar_t m, nm; + + m = wc & ei->mask; + nm = wc & ~m; + + *csid = (_citrus_csid_t)m; + *idx = (_citrus_index_t)nm; + + return (0); +} + +static __inline int +/*ARGSUSED*/ +_citrus_EUC_stdenc_cstowc(_EUCEncodingInfo * __restrict ei, + wchar_t * __restrict wc, _csid_t csid, _index_t idx) +{ + + if ((csid & ~ei->mask) != 0 || (idx & ei->mask) != 0) + return (EINVAL); + + *wc = (wchar_t)csid | (wchar_t)idx; + + return (0); +} + +static __inline int +/*ARGSUSED*/ +_citrus_EUC_stdenc_get_state_desc_generic(_EUCEncodingInfo * __restrict ei __unused, + _EUCState * __restrict psenc, int * __restrict rstate) +{ + + *rstate = (psenc->chlen == 0) ? _STDENC_SDGEN_INITIAL : + _STDENC_SDGEN_INCOMPLETE_CHAR; + return (0); +} + +static int +/*ARGSUSED*/ +_citrus_EUC_encoding_module_init(_EUCEncodingInfo * __restrict ei, + const void * __restrict var, size_t lenvar) +{ + + return (_citrus_EUC_parse_variable(ei, var, lenvar)); +} + +static void +/*ARGSUSED*/ +_citrus_EUC_encoding_module_uninit(_EUCEncodingInfo * __restrict ei __unused) +{ + +} + +/* ---------------------------------------------------------------------- + * public interface for stdenc + */ + +_CITRUS_STDENC_DECLS(EUC); +_CITRUS_STDENC_DEF_OPS(EUC); + +#include "citrus_stdenc_template.h" |