473 lines
10 KiB
C
473 lines
10 KiB
C
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/* $NetBSD: citrus_ues.c,v 1.2 2010/12/07 22:01:22 joerg Exp $ */
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/*-
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* Copyright (c)2006 Citrus Project,
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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__RCSID("$NetBSD: citrus_ues.c,v 1.2 2010/12/07 22:01:22 joerg Exp $");
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#endif /* LIBC_SCCS and not lint */
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#include <assert.h>
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#include <errno.h>
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#include <string.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <limits.h>
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#include <wchar.h>
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#include "citrus_namespace.h"
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#include "citrus_types.h"
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#include "citrus_bcs.h"
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#include "citrus_module.h"
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#include "citrus_ctype.h"
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#include "citrus_stdenc.h"
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#include "citrus_ues.h"
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typedef struct {
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int mode;
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#define MODE_C99 1
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size_t mb_cur_max;
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} _UESEncodingInfo;
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typedef struct {
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int chlen;
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char ch[12];
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} _UESState;
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typedef struct {
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_UESEncodingInfo ei;
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struct {
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/* for future multi-locale facility */
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_UESState s_mblen;
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_UESState s_mbrlen;
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_UESState s_mbrtowc;
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_UESState s_mbtowc;
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_UESState s_mbsrtowcs;
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_UESState s_wcrtomb;
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_UESState s_wcsrtombs;
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_UESState s_wctomb;
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} states;
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} _UESCTypeInfo;
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#define _CEI_TO_EI(_cei_) (&(_cei_)->ei)
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#define _CEI_TO_STATE(_cei_, _func_) (_cei_)->states.s_##_func_
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#define _FUNCNAME(m) _citrus_UES_##m
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#define _ENCODING_INFO _UESEncodingInfo
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#define _CTYPE_INFO _UESCTypeInfo
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#define _ENCODING_STATE _UESState
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#define _ENCODING_MB_CUR_MAX(_ei_) (_ei_)->mb_cur_max
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#define _ENCODING_IS_STATE_DEPENDENT 0
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#define _STATE_NEEDS_EXPLICIT_INIT(_ps_) 0
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static __inline void
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/*ARGSUSED*/
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_citrus_UES_init_state(_UESEncodingInfo * __restrict ei,
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_UESState * __restrict psenc)
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{
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psenc->chlen = 0;
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}
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static __inline void
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/*ARGSUSED*/
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_citrus_UES_pack_state(_UESEncodingInfo * __restrict ei,
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void *__restrict pspriv, const _UESState * __restrict psenc)
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{
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/* ei seem to be unused */
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_DIAGASSERT(pspriv != NULL);
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_DIAGASSERT(psenc != NULL);
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memcpy(pspriv, (const void *)psenc, sizeof(*psenc));
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}
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static __inline void
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/*ARGSUSED*/
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_citrus_UES_unpack_state(_UESEncodingInfo * __restrict ei,
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_UESState * __restrict psenc, const void * __restrict pspriv)
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{
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/* ei seem to be unused */
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_DIAGASSERT(psenc != NULL);
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_DIAGASSERT(pspriv != NULL);
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memcpy((void *)psenc, pspriv, sizeof(*psenc));
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}
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static __inline int
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to_int(int ch)
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{
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if (ch >= '0' && ch <= '9')
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return ch - '0';
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else if (ch >= 'A' && ch <= 'F')
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return (ch - 'A') + 10;
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else if (ch >= 'a' && ch <= 'f')
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return (ch - 'a') + 10;
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return -1;
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}
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#define ESCAPE '\\'
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#define UCS2_ESC 'u'
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#define UCS4_ESC 'U'
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#define UCS2_BIT 16
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#define UCS4_BIT 32
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#define BMP_MAX UINT32_C(0xFFFF)
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#define UCS2_MAX UINT32_C(0x10FFFF)
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#define UCS4_MAX UINT32_C(0x7FFFFFFF)
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static const char *xdig = "0123456789abcdef";
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static __inline int
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to_str(char *s, wchar_t wc, int bit)
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{
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char *p;
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p = s;
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*p++ = ESCAPE;
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switch (bit) {
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case UCS2_BIT:
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*p++ = UCS2_ESC;
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break;
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case UCS4_BIT:
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*p++ = UCS4_ESC;
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break;
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default:
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abort();
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}
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do {
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*p++ = xdig[(wc >> (bit -= 4)) & 0xF];
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} while (bit > 0);
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return p - s;
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}
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static __inline int
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is_hi_surrogate(wchar_t wc)
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{
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return wc >= 0xD800 && wc <= 0xDBFF;
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}
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static __inline int
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is_lo_surrogate(wchar_t wc)
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{
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return wc >= 0xDC00 && wc <= 0xDFFF;
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}
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static __inline wchar_t
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surrogate_to_ucs(wchar_t hi, wchar_t lo)
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{
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_DIAGASSERT(is_hi_surrogate(hi));
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_DIAGASSERT(is_lo_surrogate(lo));
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hi -= 0xD800;
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lo -= 0xDC00;
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return (hi << 10 | lo) + 0x10000;
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}
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static __inline void
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ucs_to_surrogate(wchar_t wc, wchar_t * __restrict hi, wchar_t * __restrict lo)
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{
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_DIAGASSERT(hi != NULL);
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_DIAGASSERT(lo != NULL);
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_DIAGASSERT(wc >= 0x10000);
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wc -= 0x10000;
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*hi = (wc >> 10) + 0xD800;
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*lo = (wc & 0x3FF) + 0xDC00;
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}
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static __inline int
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is_basic(wchar_t wc)
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{
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return (uint32_t)wc <= 0x9F &&
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wc != 0x24 && wc != 0x40 && wc != 0x60;
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}
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static int
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_citrus_UES_mbrtowc_priv(_UESEncodingInfo * __restrict ei,
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wchar_t * __restrict pwc, const char ** __restrict s, size_t n,
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_UESState * __restrict psenc, size_t * __restrict nresult)
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{
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const char *s0;
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int ch, head, tail, i, num;
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wchar_t hi, wc;
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_DIAGASSERT(ei != NULL);
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/* pwc may be null */
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_DIAGASSERT(s != NULL);
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_DIAGASSERT(psenc != NULL);
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_DIAGASSERT(nresult != NULL);
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if (*s == NULL) {
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_citrus_UES_init_state(ei, psenc);
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*nresult = 0;
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return 0;
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}
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s0 = *s;
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hi = (wchar_t)0;
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tail = 0;
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surrogate:
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wc = (wchar_t)0;
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head = tail;
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if (psenc->chlen == head) {
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if (n-- < 1)
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goto restart;
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psenc->ch[psenc->chlen++] = *s0++;
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}
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ch = (unsigned char)psenc->ch[head++];
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if (ch == ESCAPE) {
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if (psenc->chlen == head) {
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if (n-- < 1)
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goto restart;
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psenc->ch[psenc->chlen++] = *s0++;
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}
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switch (psenc->ch[head]) {
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case UCS2_ESC:
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tail += 6;
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break;
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case UCS4_ESC:
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if (ei->mode & MODE_C99) {
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tail = 10;
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break;
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}
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/*FALLTHROUGH*/
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default:
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tail = 0;
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}
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++head;
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}
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for (; head < tail; ++head) {
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if (psenc->chlen == head) {
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if (n-- < 1) {
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restart:
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*s = s0;
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*nresult = (size_t)-2;
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return 0;
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}
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psenc->ch[psenc->chlen++] = *s0++;
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}
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num = to_int((int)(unsigned char)psenc->ch[head]);
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if (num < 0) {
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tail = 0;
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break;
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}
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wc = (wc << 4) | num;
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}
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head = 0;
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switch (tail) {
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case 0:
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break;
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case 6:
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if (hi != (wchar_t)0)
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break;
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if ((ei->mode & MODE_C99) == 0) {
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if (is_hi_surrogate(wc) != 0) {
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hi = wc;
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goto surrogate;
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}
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if ((uint32_t)wc <= 0x7F /* XXX */ ||
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is_lo_surrogate(wc) != 0)
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break;
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goto done;
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}
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/*FALLTHROUGH*/
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case 10:
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if (is_basic(wc) == 0 && (uint32_t)wc <= UCS4_MAX &&
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is_hi_surrogate(wc) == 0 && is_lo_surrogate(wc) == 0)
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goto done;
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*nresult = (size_t)-1;
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return EILSEQ;
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case 12:
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if (is_lo_surrogate(wc) == 0)
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break;
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wc = surrogate_to_ucs(hi, wc);
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goto done;
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}
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ch = (unsigned char)psenc->ch[0];
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head = psenc->chlen;
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if (--head > 0)
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memmove(&psenc->ch[0], &psenc->ch[1], head);
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wc = (wchar_t)ch;
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done:
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psenc->chlen = head;
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if (pwc != NULL)
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*pwc = wc;
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*nresult = (size_t)((wc == 0) ? 0 : (s0 - *s));
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*s = s0;
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return 0;
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}
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static int
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_citrus_UES_wcrtomb_priv(_UESEncodingInfo * __restrict ei,
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char * __restrict s, size_t n, wchar_t wc,
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_UESState * __restrict psenc, size_t * __restrict nresult)
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{
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wchar_t hi, lo;
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if (psenc->chlen != 0)
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return EINVAL;
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if ((ei->mode & MODE_C99) ? is_basic(wc) : (uint32_t)wc <= 0x7F) {
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if (n-- < 1)
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goto e2big;
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psenc->ch[psenc->chlen++] = (char)wc;
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} else if ((uint32_t)wc <= BMP_MAX) {
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if (n < 6)
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goto e2big;
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psenc->chlen = to_str(&psenc->ch[0], wc, UCS2_BIT);
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} else if ((ei->mode & MODE_C99) == 0 && (uint32_t)wc <= UCS2_MAX) {
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if (n < 12)
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goto e2big;
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ucs_to_surrogate(wc, &hi, &lo);
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psenc->chlen += to_str(&psenc->ch[0], hi, UCS2_BIT);
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psenc->chlen += to_str(&psenc->ch[6], lo, UCS2_BIT);
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} else if ((ei->mode & MODE_C99) && (uint32_t)wc <= UCS4_MAX) {
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if (n < 10)
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goto e2big;
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psenc->chlen = to_str(&psenc->ch[0], wc, UCS4_BIT);
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} else {
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*nresult = (size_t)-1;
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return EILSEQ;
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}
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memcpy(s, psenc->ch, psenc->chlen);
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*nresult = psenc->chlen;
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psenc->chlen = 0;
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return 0;
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e2big:
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*nresult = (size_t)-1;
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return E2BIG;
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}
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/*ARGSUSED*/
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static int
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_citrus_UES_stdenc_wctocs(_UESEncodingInfo * __restrict ei,
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||
|
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_csid_t * __restrict csid, _index_t * __restrict idx, wchar_t wc)
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{
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|
|
/* ei seem to be unused */
|
||
|
|
_DIAGASSERT(csid != NULL);
|
||
|
|
_DIAGASSERT(idx != NULL);
|
||
|
|
|
||
|
|
*csid = 0;
|
||
|
|
*idx = (_index_t)wc;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static __inline int
|
||
|
|
/*ARGSUSED*/
|
||
|
|
_citrus_UES_stdenc_cstowc(_UESEncodingInfo * __restrict ei,
|
||
|
|
wchar_t * __restrict wc, _csid_t csid, _index_t idx)
|
||
|
|
{
|
||
|
|
/* ei seem to be unused */
|
||
|
|
_DIAGASSERT(wc != NULL);
|
||
|
|
|
||
|
|
if (csid != 0)
|
||
|
|
return EILSEQ;
|
||
|
|
*wc = (wchar_t)idx;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static __inline int
|
||
|
|
/*ARGSUSED*/
|
||
|
|
_citrus_UES_stdenc_get_state_desc_generic(_UESEncodingInfo * __restrict ei,
|
||
|
|
_UESState * __restrict psenc, int * __restrict rstate)
|
||
|
|
{
|
||
|
|
_DIAGASSERT(psenc != NULL);
|
||
|
|
_DIAGASSERT(rstate != NULL);
|
||
|
|
|
||
|
|
if (psenc->chlen == 0)
|
||
|
|
*rstate = _STDENC_SDGEN_INITIAL;
|
||
|
|
else
|
||
|
|
*rstate = _STDENC_SDGEN_INCOMPLETE_CHAR; /* XXX */
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
/*ARGSUSED*/
|
||
|
|
_citrus_UES_encoding_module_uninit(_UESEncodingInfo *ei)
|
||
|
|
{
|
||
|
|
/* ei seems to be unused */
|
||
|
|
}
|
||
|
|
|
||
|
|
static int
|
||
|
|
/*ARGSUSED*/
|
||
|
|
_citrus_UES_encoding_module_init(_UESEncodingInfo * __restrict ei,
|
||
|
|
const void * __restrict var, size_t lenvar)
|
||
|
|
{
|
||
|
|
const char *p;
|
||
|
|
|
||
|
|
_DIAGASSERT(ei != NULL);
|
||
|
|
|
||
|
|
p = var;
|
||
|
|
#define MATCH(x, act) \
|
||
|
|
do { \
|
||
|
|
if (lenvar >= (sizeof(#x)-1) && \
|
||
|
|
_bcs_strncasecmp(p, #x, sizeof(#x)-1) == 0) { \
|
||
|
|
act; \
|
||
|
|
lenvar -= sizeof(#x)-1; \
|
||
|
|
p += sizeof(#x)-1; \
|
||
|
|
} \
|
||
|
|
} while (/*CONSTCOND*/0)
|
||
|
|
memset((void *)ei, 0, sizeof(*ei));
|
||
|
|
while (lenvar > 0) {
|
||
|
|
switch (_bcs_toupper(*p)) {
|
||
|
|
case 'C':
|
||
|
|
MATCH(C99, ei->mode |= MODE_C99);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
++p;
|
||
|
|
--lenvar;
|
||
|
|
}
|
||
|
|
ei->mb_cur_max = (ei->mode & MODE_C99) ? 10 : 12;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* ----------------------------------------------------------------------
|
||
|
|
* public interface for ctype
|
||
|
|
*/
|
||
|
|
|
||
|
|
_CITRUS_CTYPE_DECLS(UES);
|
||
|
|
_CITRUS_CTYPE_DEF_OPS(UES);
|
||
|
|
|
||
|
|
#include "citrus_ctype_template.h"
|
||
|
|
|
||
|
|
/* ----------------------------------------------------------------------
|
||
|
|
* public interface for stdenc
|
||
|
|
*/
|
||
|
|
|
||
|
|
_CITRUS_STDENC_DECLS(UES);
|
||
|
|
_CITRUS_STDENC_DEF_OPS(UES);
|
||
|
|
|
||
|
|
#include "citrus_stdenc_template.h"
|