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Editing: citrus_euc.c
/* $FreeBSD$ */ /* $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. */ /*- * SPDX-License-Identifier: BSD-3-Clause * * 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)); } #if 0 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)); } #endif 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"
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