1 /* $NetBSD: citrus_ues.c,v 1.1 2006/11/13 15:16:31 tnozaki Exp $ */
4 * Copyright (c)2006 Citrus Project,
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 #include "citrus_namespace.h"
39 #include "citrus_types.h"
40 #include "citrus_bcs.h"
41 #include "citrus_module.h"
42 #include "citrus_ctype.h"
43 #include "citrus_stdenc.h"
44 #include "citrus_ues.h"
60 /* for future multi-locale facility */
65 _UESState s_mbsrtowcs;
67 _UESState s_wcsrtombs;
72 #define _CEI_TO_EI(_cei_) (&(_cei_)->ei)
73 #define _CEI_TO_STATE(_cei_, _func_) (_cei_)->states.s_##_func_
75 #define _FUNCNAME(m) _citrus_UES_##m
76 #define _ENCODING_INFO _UESEncodingInfo
77 #define _CTYPE_INFO _UESCTypeInfo
78 #define _ENCODING_STATE _UESState
79 #define _ENCODING_MB_CUR_MAX(_ei_) (_ei_)->mb_cur_max
80 #define _ENCODING_IS_STATE_DEPENDENT 0
81 #define _STATE_NEEDS_EXPLICIT_INIT(_ps_) 0
85 _citrus_UES_init_state(_UESEncodingInfo * __restrict ei,
86 _UESState * __restrict psenc)
93 _citrus_UES_pack_state(_UESEncodingInfo * __restrict ei,
94 void *__restrict pspriv, const _UESState * __restrict psenc)
96 /* ei seem to be unused */
97 _DIAGASSERT(pspriv != NULL);
98 _DIAGASSERT(psenc != NULL);
100 memcpy(pspriv, (const void *)psenc, sizeof(*psenc));
105 _citrus_UES_unpack_state(_UESEncodingInfo * __restrict ei,
106 _UESState * __restrict psenc, const void * __restrict pspriv)
108 /* ei seem to be unused */
109 _DIAGASSERT(psenc != NULL);
110 _DIAGASSERT(pspriv != NULL);
112 memcpy((void *)psenc, pspriv, sizeof(*psenc));
118 if (ch >= '0' && ch <= '9')
120 else if (ch >= 'A' && ch <= 'F')
121 return (ch - 'A') + 10;
122 else if (ch >= 'a' && ch <= 'f')
123 return (ch - 'a') + 10;
133 #define BMP_MAX UINT32_C(0xFFFF)
134 #define UCS2_MAX UINT32_C(0x10FFFF)
135 #define UCS4_MAX UINT32_C(0x7FFFFFFF)
137 static const char *xdig = "0123456789abcdef";
140 to_str(char *s, wchar_t wc, int bit)
157 *p++ = xdig[(wc >> (bit -= 4)) & 0xF];
163 is_hi_surrogate(wchar_t wc)
165 return wc >= 0xD800 && wc <= 0xDBFF;
169 is_lo_surrogate(wchar_t wc)
171 return wc >= 0xDC00 && wc <= 0xDFFF;
174 static __inline wchar_t
175 surrogate_to_ucs(wchar_t hi, wchar_t lo)
177 _DIAGASSERT(is_hi_surrogate(hi));
178 _DIAGASSERT(is_lo_surrogate(lo));
182 return (hi << 10 | lo) + 0x10000;
186 ucs_to_surrogate(wchar_t wc, wchar_t * __restrict hi, wchar_t * __restrict lo)
188 _DIAGASSERT(hi != NULL);
189 _DIAGASSERT(lo != NULL);
190 _DIAGASSERT(wc >= 0x10000);
193 *hi = (wc >> 10) + 0xD800;
194 *lo = (wc & 0x3FF) + 0xDC00;
200 return (uint32_t)wc <= 0x9F &&
201 wc != 0x24 && wc != 0x40 && wc != 0x60;
205 _citrus_UES_mbrtowc_priv(_UESEncodingInfo * __restrict ei,
206 wchar_t * __restrict pwc, const char ** __restrict s, size_t n,
207 _UESState * __restrict psenc, size_t * __restrict nresult)
210 int ch, head, tail, i, num;
213 _DIAGASSERT(ei != NULL);
214 /* pwc may be null */
215 _DIAGASSERT(s != NULL);
216 _DIAGASSERT(psenc != NULL);
217 _DIAGASSERT(nresult != NULL);
220 _citrus_UES_init_state(ei, psenc);
232 if (psenc->chlen == head) {
235 psenc->ch[psenc->chlen++] = *s0++;
237 ch = (unsigned char)psenc->ch[head++];
239 if (psenc->chlen == head) {
242 psenc->ch[psenc->chlen++] = *s0++;
244 switch (psenc->ch[head]) {
249 if (ei->mode & MODE_C99) {
259 for (; head < tail; ++head) {
260 if (psenc->chlen == head) {
264 *nresult = (size_t)-2;
267 psenc->ch[psenc->chlen++] = *s0++;
269 num = to_int((int)(unsigned char)psenc->ch[head]);
274 wc = (wc << 4) | num;
281 if (hi != (wchar_t)0)
283 if ((ei->mode & MODE_C99) == 0) {
284 if (is_hi_surrogate(wc) != 0) {
288 if ((uint32_t)wc <= 0x7F /* XXX */ ||
289 is_lo_surrogate(wc) != 0)
295 if (is_basic(wc) == 0 && (uint32_t)wc <= UCS4_MAX &&
296 is_hi_surrogate(wc) == 0 && is_lo_surrogate(wc) == 0)
298 *nresult = (size_t)-1;
301 if (is_lo_surrogate(wc) == 0)
303 wc = surrogate_to_ucs(hi, wc);
306 ch = (unsigned char)psenc->ch[0];
309 memmove(&psenc->ch[0], &psenc->ch[1], head);
315 *nresult = (size_t)((wc == 0) ? 0 : (s0 - *s));
322 _citrus_UES_wcrtomb_priv(_UESEncodingInfo * __restrict ei,
323 char * __restrict s, size_t n, wchar_t wc,
324 _UESState * __restrict psenc, size_t * __restrict nresult)
328 if (psenc->chlen != 0)
331 if ((ei->mode & MODE_C99) ? is_basic(wc) : (uint32_t)wc <= 0x7F) {
334 psenc->ch[psenc->chlen++] = (char)wc;
335 } else if ((uint32_t)wc <= BMP_MAX) {
338 psenc->chlen = to_str(&psenc->ch[0], wc, UCS2_BIT);
339 } else if ((ei->mode & MODE_C99) == 0 && (uint32_t)wc <= UCS2_MAX) {
342 ucs_to_surrogate(wc, &hi, &lo);
343 psenc->chlen += to_str(&psenc->ch[0], hi, UCS2_BIT);
344 psenc->chlen += to_str(&psenc->ch[6], lo, UCS2_BIT);
345 } else if ((ei->mode & MODE_C99) && (uint32_t)wc <= UCS4_MAX) {
348 psenc->chlen = to_str(&psenc->ch[0], wc, UCS4_BIT);
350 *nresult = (size_t)-1;
353 memcpy(s, psenc->ch, psenc->chlen);
354 *nresult = psenc->chlen;
360 *nresult = (size_t)-1;
366 _citrus_UES_stdenc_wctocs(_UESEncodingInfo * __restrict ei,
367 _csid_t * __restrict csid, _index_t * __restrict idx, wchar_t wc)
369 /* ei seem to be unused */
370 _DIAGASSERT(csid != NULL);
371 _DIAGASSERT(idx != NULL);
381 _citrus_UES_stdenc_cstowc(_UESEncodingInfo * __restrict ei,
382 wchar_t * __restrict wc, _csid_t csid, _index_t idx)
384 /* ei seem to be unused */
385 _DIAGASSERT(wc != NULL);
396 _citrus_UES_stdenc_get_state_desc_generic(_UESEncodingInfo * __restrict ei,
397 _UESState * __restrict psenc, int * __restrict rstate)
399 _DIAGASSERT(psenc != NULL);
400 _DIAGASSERT(rstate != NULL);
402 if (psenc->chlen == 0)
403 *rstate = _STDENC_SDGEN_INITIAL;
405 *rstate = _STDENC_SDGEN_INCOMPLETE_CHAR; /* XXX */
412 _citrus_UES_encoding_module_uninit(_UESEncodingInfo *ei)
414 /* ei seems to be unused */
419 _citrus_UES_encoding_module_init(_UESEncodingInfo * __restrict ei,
420 const void * __restrict var, size_t lenvar)
424 _DIAGASSERT(ei != NULL);
427 #define MATCH(x, act) \
429 if (lenvar >= (sizeof(#x)-1) && \
430 _bcs_strncasecmp(p, #x, sizeof(#x)-1) == 0) { \
432 lenvar -= sizeof(#x)-1; \
435 } while (/*CONSTCOND*/0)
436 memset((void *)ei, 0, sizeof(*ei));
438 switch (_bcs_toupper(*p)) {
440 MATCH(C99, ei->mode |= MODE_C99);
446 ei->mb_cur_max = (ei->mode & MODE_C99) ? 10 : 12;
451 /* ----------------------------------------------------------------------
452 * public interface for ctype
455 _CITRUS_CTYPE_DECLS(UES);
456 _CITRUS_CTYPE_DEF_OPS(UES);
458 #include "citrus_ctype_template.h"
460 /* ----------------------------------------------------------------------
461 * public interface for stdenc
464 _CITRUS_STDENC_DECLS(UES);
465 _CITRUS_STDENC_DEF_OPS(UES);
467 #include "citrus_stdenc_template.h"