diff options
Diffstat (limited to 'lib/libiconv_modules/UTF1632/citrus_utf1632.c')
| -rw-r--r-- | lib/libiconv_modules/UTF1632/citrus_utf1632.c | 453 |
1 files changed, 453 insertions, 0 deletions
diff --git a/lib/libiconv_modules/UTF1632/citrus_utf1632.c b/lib/libiconv_modules/UTF1632/citrus_utf1632.c new file mode 100644 index 0000000..6682ab2 --- /dev/null +++ b/lib/libiconv_modules/UTF1632/citrus_utf1632.c @@ -0,0 +1,453 @@ +/* $FreeBSD$ */ +/* $NetBSD: citrus_utf1632.c,v 1.9 2008/06/14 16:01:08 tnozaki Exp $ */ + +/*- + * Copyright (c)2003 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/endian.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_types.h" +#include "citrus_module.h" +#include "citrus_stdenc.h" +#include "citrus_bcs.h" + +#include "citrus_utf1632.h" + + +/* ---------------------------------------------------------------------- + * private stuffs used by templates + */ + +typedef struct { + int chlen; + int current_endian; + uint8_t ch[4]; +} _UTF1632State; + +#define _ENDIAN_UNKNOWN 0 +#define _ENDIAN_BIG 1 +#define _ENDIAN_LITTLE 2 +#if BYTE_ORDER == BIG_ENDIAN +#define _ENDIAN_INTERNAL _ENDIAN_BIG +#define _ENDIAN_SWAPPED _ENDIAN_LITTLE +#else +#define _ENDIAN_INTERNAL _ENDIAN_LITTLE +#define _ENDIAN_SWAPPED _ENDIAN_BIG +#endif +#define _MODE_UTF32 0x00000001U +#define _MODE_FORCE_ENDIAN 0x00000002U + +typedef struct { + int preffered_endian; + unsigned int cur_max; + uint32_t mode; +} _UTF1632EncodingInfo; + +#define _FUNCNAME(m) _citrus_UTF1632_##m +#define _ENCODING_INFO _UTF1632EncodingInfo +#define _ENCODING_STATE _UTF1632State +#define _ENCODING_MB_CUR_MAX(_ei_) ((_ei_)->cur_max) +#define _ENCODING_IS_STATE_DEPENDENT 0 +#define _STATE_NEEDS_EXPLICIT_INIT(_ps_) 0 + + +static __inline void +/*ARGSUSED*/ +_citrus_UTF1632_init_state(_UTF1632EncodingInfo *ei __unused, + _UTF1632State *s) +{ + + memset(s, 0, sizeof(*s)); +} + +static int +_citrus_UTF1632_mbrtowc_priv(_UTF1632EncodingInfo *ei, wchar_t *pwc, + char **s, size_t n, _UTF1632State *psenc, size_t *nresult) +{ + char *s0; + size_t result; + wchar_t wc = L'\0'; + int chlenbak, endian, needlen; + + s0 = *s; + + if (s0 == NULL) { + _citrus_UTF1632_init_state(ei, psenc); + *nresult = 0; /* state independent */ + return (0); + } + + result = 0; + chlenbak = psenc->chlen; + +refetch: + needlen = ((ei->mode & _MODE_UTF32) != 0 || chlenbak >= 2) ? 4 : 2; + + while (chlenbak < needlen) { + if (n == 0) + goto restart; + psenc->ch[chlenbak++] = *s0++; + n--; + result++; + } + + /* judge endian marker */ + if ((ei->mode & _MODE_UTF32) == 0) { + /* UTF16 */ + if (psenc->ch[0] == 0xFE && psenc->ch[1] == 0xFF) { + psenc->current_endian = _ENDIAN_BIG; + chlenbak = 0; + goto refetch; + } else if (psenc->ch[0] == 0xFF && psenc->ch[1] == 0xFE) { + psenc->current_endian = _ENDIAN_LITTLE; + chlenbak = 0; + goto refetch; + } + } else { + /* UTF32 */ + if (psenc->ch[0] == 0x00 && psenc->ch[1] == 0x00 && + psenc->ch[2] == 0xFE && psenc->ch[3] == 0xFF) { + psenc->current_endian = _ENDIAN_BIG; + chlenbak = 0; + goto refetch; + } else if (psenc->ch[0] == 0xFF && psenc->ch[1] == 0xFE && + psenc->ch[2] == 0x00 && psenc->ch[3] == 0x00) { + psenc->current_endian = _ENDIAN_LITTLE; + chlenbak = 0; + goto refetch; + } + } + endian = ((ei->mode & _MODE_FORCE_ENDIAN) != 0 || + psenc->current_endian == _ENDIAN_UNKNOWN) ? ei->preffered_endian : + psenc->current_endian; + + /* get wc */ + if ((ei->mode & _MODE_UTF32) == 0) { + /* UTF16 */ + if (needlen == 2) { + switch (endian) { + case _ENDIAN_LITTLE: + wc = (psenc->ch[0] | + ((wchar_t)psenc->ch[1] << 8)); + break; + case _ENDIAN_BIG: + wc = (psenc->ch[1] | + ((wchar_t)psenc->ch[0] << 8)); + break; + default: + goto ilseq; + } + if (wc >= 0xD800 && wc <= 0xDBFF) { + /* surrogate high */ + needlen = 4; + goto refetch; + } + } else { + /* surrogate low */ + wc -= 0xD800; /* wc : surrogate high (see above) */ + wc <<= 10; + switch (endian) { + case _ENDIAN_LITTLE: + if (psenc->ch[3] < 0xDC || psenc->ch[3] > 0xDF) + goto ilseq; + wc |= psenc->ch[2]; + wc |= (wchar_t)(psenc->ch[3] & 3) << 8; + break; + case _ENDIAN_BIG: + if (psenc->ch[2]<0xDC || psenc->ch[2]>0xDF) + goto ilseq; + wc |= psenc->ch[3]; + wc |= (wchar_t)(psenc->ch[2] & 3) << 8; + break; + default: + goto ilseq; + } + wc += 0x10000; + } + } else { + /* UTF32 */ + switch (endian) { + case _ENDIAN_LITTLE: + wc = (psenc->ch[0] | + ((wchar_t)psenc->ch[1] << 8) | + ((wchar_t)psenc->ch[2] << 16) | + ((wchar_t)psenc->ch[3] << 24)); + break; + case _ENDIAN_BIG: + wc = (psenc->ch[3] | + ((wchar_t)psenc->ch[2] << 8) | + ((wchar_t)psenc->ch[1] << 16) | + ((wchar_t)psenc->ch[0] << 24)); + break; + default: + goto ilseq; + } + if (wc >= 0xD800 && wc <= 0xDFFF) + goto ilseq; + } + + + *pwc = wc; + psenc->chlen = 0; + *nresult = result; + *s = s0; + + return (0); + +ilseq: + *nresult = (size_t)-1; + psenc->chlen = 0; + return (EILSEQ); + +restart: + *nresult = (size_t)-2; + psenc->chlen = chlenbak; + *s = s0; + return (0); +} + +static int +_citrus_UTF1632_wcrtomb_priv(_UTF1632EncodingInfo *ei, char *s, size_t n, + wchar_t wc, _UTF1632State *psenc, size_t *nresult) +{ + wchar_t wc2; + static const char _bom[4] = { + 0x00, 0x00, 0xFE, 0xFF, + }; + const char *bom = &_bom[0]; + size_t cnt; + + cnt = (size_t)0; + if (psenc->current_endian == _ENDIAN_UNKNOWN) { + if ((ei->mode & _MODE_FORCE_ENDIAN) == 0) { + if (ei->mode & _MODE_UTF32) + cnt = 4; + else { + cnt = 2; + bom += 2; + } + if (n < cnt) + goto e2big; + memcpy(s, bom, cnt); + s += cnt, n -= cnt; + } + psenc->current_endian = ei->preffered_endian; + } + + wc2 = 0; + if ((ei->mode & _MODE_UTF32)==0) { + /* UTF16 */ + if (wc > 0xFFFF) { + /* surrogate */ + if (wc > 0x10FFFF) + goto ilseq; + if (n < 4) + goto e2big; + cnt += 4; + wc -= 0x10000; + wc2 = (wc & 0x3FF) | 0xDC00; + wc = (wc>>10) | 0xD800; + } else { + if (n < 2) + goto e2big; + cnt += 2; + } + +surrogate: + switch (psenc->current_endian) { + case _ENDIAN_BIG: + s[1] = wc; + s[0] = (wc >>= 8); + break; + case _ENDIAN_LITTLE: + s[0] = wc; + s[1] = (wc >>= 8); + break; + } + if (wc2 != 0) { + wc = wc2; + wc2 = 0; + s += 2; + goto surrogate; + } + } else { + /* UTF32 */ + if (wc >= 0xD800 && wc <= 0xDFFF) + goto ilseq; + if (n < 4) + goto e2big; + cnt += 4; + switch (psenc->current_endian) { + case _ENDIAN_BIG: + s[3] = wc; + s[2] = (wc >>= 8); + s[1] = (wc >>= 8); + s[0] = (wc >>= 8); + break; + case _ENDIAN_LITTLE: + s[0] = wc; + s[1] = (wc >>= 8); + s[2] = (wc >>= 8); + s[3] = (wc >>= 8); + break; + } + } + *nresult = cnt; + + return (0); + +ilseq: + *nresult = (size_t)-1; + return (EILSEQ); +e2big: + *nresult = (size_t)-1; + return (E2BIG); +} + +static void +parse_variable(_UTF1632EncodingInfo * __restrict ei, + const void * __restrict var, size_t lenvar) +{ + const char *p; + + p = var; + while (lenvar > 0) { + switch (*p) { + case 'B': + case 'b': + MATCH(big, ei->preffered_endian = _ENDIAN_BIG); + break; + case 'L': + case 'l': + MATCH(little, ei->preffered_endian = _ENDIAN_LITTLE); + break; + case 'i': + case 'I': + MATCH(internal, ei->preffered_endian = _ENDIAN_INTERNAL); + break; + case 's': + case 'S': + MATCH(swapped, ei->preffered_endian = _ENDIAN_SWAPPED); + break; + case 'F': + case 'f': + MATCH(force, ei->mode |= _MODE_FORCE_ENDIAN); + break; + case 'U': + case 'u': + MATCH(utf32, ei->mode |= _MODE_UTF32); + break; + } + p++; + lenvar--; + } +} + +static int +/*ARGSUSED*/ +_citrus_UTF1632_encoding_module_init(_UTF1632EncodingInfo * __restrict ei, + const void * __restrict var, size_t lenvar) +{ + + memset((void *)ei, 0, sizeof(*ei)); + + parse_variable(ei, var, lenvar); + + ei->cur_max = ((ei->mode&_MODE_UTF32) == 0) ? 6 : 8; + /* 6: endian + surrogate */ + /* 8: endian + normal */ + + if (ei->preffered_endian == _ENDIAN_UNKNOWN) { + ei->preffered_endian = _ENDIAN_BIG; + } + + return (0); +} + +static void +/*ARGSUSED*/ +_citrus_UTF1632_encoding_module_uninit(_UTF1632EncodingInfo *ei __unused) +{ + +} + +static __inline int +/*ARGSUSED*/ +_citrus_UTF1632_stdenc_wctocs(_UTF1632EncodingInfo * __restrict ei __unused, + _csid_t * __restrict csid, _index_t * __restrict idx, _wc_t wc) +{ + + *csid = 0; + *idx = (_index_t)wc; + + return (0); +} + +static __inline int +/*ARGSUSED*/ +_citrus_UTF1632_stdenc_cstowc(_UTF1632EncodingInfo * __restrict ei __unused, + _wc_t * __restrict wc, _csid_t csid, _index_t idx) +{ + + if (csid != 0) + return (EILSEQ); + + *wc = (_wc_t)idx; + + return (0); +} + +static __inline int +/*ARGSUSED*/ +_citrus_UTF1632_stdenc_get_state_desc_generic(_UTF1632EncodingInfo * __restrict ei __unused, + _UTF1632State * __restrict psenc, int * __restrict rstate) +{ + + *rstate = (psenc->chlen == 0) ? _STDENC_SDGEN_INITIAL : + _STDENC_SDGEN_INCOMPLETE_CHAR; + return (0); +} + +/* ---------------------------------------------------------------------- + * public interface for stdenc + */ + +_CITRUS_STDENC_DECLS(UTF1632); +_CITRUS_STDENC_DEF_OPS(UTF1632); + +#include "citrus_stdenc_template.h" |
