/* $NetBSD: citrus_utf8.c,v 1.18 2013/05/28 16:57:56 joerg 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 #if defined(LIBC_SCCS) && !defined(lint) __RCSID("$NetBSD: citrus_utf8.c,v 1.18 2013/05/28 16:57:56 joerg Exp $"); #endif /* LIBC_SCCS and not lint */ #include #include #include #include #include #include #include #include #include #include "citrus_namespace.h" #include "citrus_types.h" #include "citrus_module.h" #include "citrus_ctype.h" #include "citrus_stdenc.h" #include "citrus_utf8.h" /* ---------------------------------------------------------------------- * private stuffs used by templates */ static int _UTF8_count_array[256]; static int const *_UTF8_count = NULL; static const u_int32_t _UTF8_range[] = { 0, /*dummy*/ 0x00000000, 0x00000080, 0x00000800, 0x00010000, 0x00200000, 0x04000000, 0x80000000, }; typedef struct { char ch[6]; int chlen; } _UTF8State; typedef struct { } _UTF8EncodingInfo; typedef struct { _UTF8EncodingInfo ei; struct { /* for future multi-locale facility */ _UTF8State s_mblen; _UTF8State s_mbrlen; _UTF8State s_mbrtowc; _UTF8State s_mbtowc; _UTF8State s_mbsrtowcs; _UTF8State s_mbsnrtowcs; _UTF8State s_wcrtomb; _UTF8State s_wcsrtombs; _UTF8State s_wcsnrtombs; _UTF8State s_wctomb; } states; } _UTF8CTypeInfo; #define _CEI_TO_EI(_cei_) (&(_cei_)->ei) #define _CEI_TO_STATE(_ei_, _func_) (_ei_)->states.s_##_func_ #define _FUNCNAME(m) _citrus_UTF8_##m #define _ENCODING_INFO _UTF8EncodingInfo #define _CTYPE_INFO _UTF8CTypeInfo #define _ENCODING_STATE _UTF8State #define _ENCODING_MB_CUR_MAX(_ei_) 6 #define _ENCODING_IS_STATE_DEPENDENT 0 #define _STATE_NEEDS_EXPLICIT_INIT(_ps_) 0 static __inline void _UTF8_init_count(void) { int i; if (!_UTF8_count) { memset(_UTF8_count_array, 0, sizeof(_UTF8_count_array)); for (i = 0; i <= 0x7f; i++) _UTF8_count_array[i] = 1; for (i = 0xc0; i <= 0xdf; i++) _UTF8_count_array[i] = 2; for (i = 0xe0; i <= 0xef; i++) _UTF8_count_array[i] = 3; for (i = 0xf0; i <= 0xf7; i++) _UTF8_count_array[i] = 4; for (i = 0xf8; i <= 0xfb; i++) _UTF8_count_array[i] = 5; for (i = 0xfc; i <= 0xfd; i++) _UTF8_count_array[i] = 6; _UTF8_count = _UTF8_count_array; } } static int _UTF8_findlen(wchar_t v) { int i; u_int32_t c; c = (u_int32_t)v; /*XXX*/ for (i = 1; i < sizeof(_UTF8_range) / sizeof(_UTF8_range[0]) - 1; i++) if (c >= _UTF8_range[i] && c < _UTF8_range[i + 1]) return i; return -1; /*out of range*/ } static __inline int _UTF8_surrogate(wchar_t wc) { return wc >= 0xd800 && wc <= 0xdfff; } static __inline void /*ARGSUSED*/ _citrus_UTF8_init_state(_UTF8EncodingInfo *ei, _UTF8State *s) { s->chlen = 0; } static __inline void /*ARGSUSED*/ _citrus_UTF8_pack_state(_UTF8EncodingInfo *ei, void *pspriv, const _UTF8State *s) { memcpy(pspriv, (const void *)s, sizeof(*s)); } static __inline void /*ARGSUSED*/ _citrus_UTF8_unpack_state(_UTF8EncodingInfo *ei, _UTF8State *s, const void *pspriv) { memcpy((void *)s, pspriv, sizeof(*s)); } static int _citrus_UTF8_mbrtowc_priv(_UTF8EncodingInfo *ei, wchar_t *pwc, const char **s, size_t n, _UTF8State *psenc, size_t *nresult) { wchar_t wchar; const char *s0; int c; int i; _DIAGASSERT(nresult != 0); _DIAGASSERT(s != NULL); _DIAGASSERT(psenc != NULL); s0 = *s; if (s0 == NULL) { _citrus_UTF8_init_state(ei, psenc); *nresult = 0; /* state independent */ return 0; } /* make sure we have the first byte in the buffer */ if (psenc->chlen == 0) { if (n-- < 1) goto restart; psenc->ch[psenc->chlen++] = *s0++; } c = _UTF8_count[psenc->ch[0] & 0xff]; if (c < 1 || c < psenc->chlen) goto ilseq; if (c == 1) wchar = psenc->ch[0] & 0xff; else { while (psenc->chlen < c) { if (n-- < 1) goto restart; psenc->ch[psenc->chlen++] = *s0++; } wchar = psenc->ch[0] & (0x7f >> c); for (i = 1; i < c; i++) { if ((psenc->ch[i] & 0xc0) != 0x80) goto ilseq; wchar <<= 6; wchar |= (psenc->ch[i] & 0x3f); } if (_UTF8_surrogate(wchar) || _UTF8_findlen(wchar) != c) goto ilseq; } if (pwc != NULL) *pwc = wchar; *nresult = (wchar == 0) ? 0 : s0 - *s; *s = s0; psenc->chlen = 0; return 0; ilseq: *nresult = (size_t)-1; return EILSEQ; restart: *s = s0; *nresult = (size_t)-2; return 0; } static int _citrus_UTF8_wcrtomb_priv(_UTF8EncodingInfo *ei, char *s, size_t n, wchar_t wc, _UTF8State *psenc, size_t *nresult) { int cnt, i, ret; wchar_t c; _DIAGASSERT(nresult != 0); _DIAGASSERT(s != NULL); if (_UTF8_surrogate(wc)) { ret = EILSEQ; goto err; } cnt = _UTF8_findlen(wc); if (cnt <= 0 || cnt > 6) { /* invalid UCS4 value */ ret = EILSEQ; goto err; } if (n < cnt) { /* bound check failure */ ret = E2BIG; goto err; } c = wc; if (s) { for (i = cnt - 1; i > 0; i--) { s[i] = 0x80 | (c & 0x3f); c >>= 6; } s[0] = c; if (cnt == 1) s[0] &= 0x7f; else { s[0] &= (0x7f >> cnt); s[0] |= ((0xff00 >> cnt) & 0xff); } } *nresult = (size_t)cnt; return 0; err: *nresult = (size_t)-1; return ret; } static __inline int /*ARGSUSED*/ _citrus_UTF8_stdenc_wctocs(_UTF8EncodingInfo * __restrict ei, _csid_t * __restrict csid, _index_t * __restrict idx, wchar_t wc) { _DIAGASSERT(csid != NULL && idx != NULL); *csid = 0; *idx = (_citrus_index_t)wc; return (0); } static __inline int /*ARGSUSED*/ _citrus_UTF8_stdenc_cstowc(_UTF8EncodingInfo * __restrict ei, wchar_t * __restrict wc, _csid_t csid, _index_t idx) { _DIAGASSERT(wc != NULL); if (csid != 0) return (EILSEQ); *wc = (wchar_t)idx; return (0); } static __inline int /*ARGSUSED*/ _citrus_UTF8_stdenc_get_state_desc_generic(_UTF8EncodingInfo * __restrict ei, _UTF8State * __restrict psenc, int * __restrict rstate) { if (psenc->chlen == 0) *rstate = _STDENC_SDGEN_INITIAL; else *rstate = _STDENC_SDGEN_INCOMPLETE_CHAR; return 0; } static int /*ARGSUSED*/ _citrus_UTF8_encoding_module_init(_UTF8EncodingInfo * __restrict ei, const void * __restrict var, size_t lenvar) { _UTF8_init_count(); return 0; } static void /*ARGSUSED*/ _citrus_UTF8_encoding_module_uninit(_UTF8EncodingInfo *ei) { } /* ---------------------------------------------------------------------- * public interface for ctype */ _CITRUS_CTYPE_DECLS(UTF8); _CITRUS_CTYPE_DEF_OPS(UTF8); #include "citrus_ctype_template.h" /* ---------------------------------------------------------------------- * public interface for stdenc */ _CITRUS_STDENC_DECLS(UTF8); _CITRUS_STDENC_DEF_OPS(UTF8); #include "citrus_stdenc_template.h"