diff options
Diffstat (limited to 'lib/libiconv_modules/UTF8/citrus_utf8.c')
-rw-r--r-- | lib/libiconv_modules/UTF8/citrus_utf8.c | 349 |
1 files changed, 349 insertions, 0 deletions
diff --git a/lib/libiconv_modules/UTF8/citrus_utf8.c b/lib/libiconv_modules/UTF8/citrus_utf8.c new file mode 100644 index 0000000..2bd8d81 --- /dev/null +++ b/lib/libiconv_modules/UTF8/citrus_utf8.c @@ -0,0 +1,349 @@ +/* $FreeBSD$ */ +/* $NetBSD: citrus_utf8.c,v 1.17 2008/06/14 16:01:08 tnozaki 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 <stdbool.h> +#include <stddef.h> +#include <stdio.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_utf8.h" + + +/* ---------------------------------------------------------------------- + * private stuffs used by templates + */ + +static uint8_t _UTF8_count_array[256] = { + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 00 - 0F */ + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 10 - 1F */ + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 20 - 2F */ + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 30 - 3F */ + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 40 - 4F */ + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 50 - 5F */ + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 60 - 6F */ + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 70 - 7F */ + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 80 - 8F */ + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 90 - 9F */ + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* A0 - AF */ + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* B0 - BF */ + 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* C0 - CF */ + 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* D0 - DF */ + 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* E0 - EF */ + 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 0, 0 /* F0 - FF */ +}; + +static uint8_t const *_UTF8_count = _UTF8_count_array; + +static const uint32_t _UTF8_range[] = { + 0, /*dummy*/ + 0x00000000, 0x00000080, 0x00000800, 0x00010000, + 0x00200000, 0x04000000, 0x80000000, +}; + +typedef struct { + int chlen; + char ch[6]; +} _UTF8State; + +typedef void *_UTF8EncodingInfo; + +#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 _ENCODING_STATE _UTF8State +#define _ENCODING_MB_CUR_MAX(_ei_) 6 +#define _ENCODING_IS_STATE_DEPENDENT 0 +#define _STATE_NEEDS_EXPLICIT_INIT(_ps_) 0 + +static size_t +_UTF8_findlen(wchar_t v) +{ + size_t i; + uint32_t c; + + c = (uint32_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 bool +_UTF8_surrogate(wchar_t wc) +{ + + return (wc >= 0xd800 && wc <= 0xdfff); +} + +static __inline void +/*ARGSUSED*/ +_citrus_UTF8_init_state(_UTF8EncodingInfo *ei __unused, _UTF8State *s) +{ + + s->chlen = 0; +} + +static __inline void +/*ARGSUSED*/ +_citrus_UTF8_pack_state(_UTF8EncodingInfo *ei __unused, void *pspriv, + const _UTF8State *s) +{ + + memcpy(pspriv, (const void *)s, sizeof(*s)); +} + +static __inline void +/*ARGSUSED*/ +_citrus_UTF8_unpack_state(_UTF8EncodingInfo *ei __unused, _UTF8State *s, + const void *pspriv) +{ + + memcpy((void *)s, pspriv, sizeof(*s)); +} + +static int +_citrus_UTF8_mbrtowc_priv(_UTF8EncodingInfo *ei, wchar_t *pwc, char **s, + size_t n, _UTF8State *psenc, size_t *nresult) +{ + char *s0; + wchar_t wchar; + int i; + uint8_t c; + + 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 __unused, char *s, size_t n, + wchar_t wc, _UTF8State *psenc __unused, size_t *nresult) +{ + wchar_t c; + size_t cnt; + int i, ret; + + 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 __unused, + _csid_t * __restrict csid, _index_t * __restrict idx, + wchar_t wc) +{ + + *csid = 0; + *idx = (_citrus_index_t)wc; + + return (0); +} + +static __inline int +/*ARGSUSED*/ +_citrus_UTF8_stdenc_cstowc(_UTF8EncodingInfo * __restrict ei __unused, + wchar_t * __restrict wc, _csid_t csid, _index_t idx) +{ + + 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 __unused, + _UTF8State * __restrict psenc, int * __restrict rstate) +{ + + *rstate = (psenc->chlen == 0) ? _STDENC_SDGEN_INITIAL : + _STDENC_SDGEN_INCOMPLETE_CHAR; + return (0); +} + +static int +/*ARGSUSED*/ +_citrus_UTF8_encoding_module_init(_UTF8EncodingInfo * __restrict ei __unused, + const void * __restrict var __unused, size_t lenvar __unused) +{ + + return (0); +} + +static void +/*ARGSUSED*/ +_citrus_UTF8_encoding_module_uninit(_UTF8EncodingInfo *ei __unused) +{ + +} + +/* ---------------------------------------------------------------------- + * public interface for stdenc + */ + +_CITRUS_STDENC_DECLS(UTF8); +_CITRUS_STDENC_DEF_OPS(UTF8); + +#include "citrus_stdenc_template.h" |