554 lines
11 KiB
C
554 lines
11 KiB
C
/* $NetBSD: multibyte.c,v 1.13 2001/10/09 10:21:48 yamt Exp $ */
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/*-
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* Copyright (c) 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Paul Borman at Krystal Technologies.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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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#if 0
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static char sccsid[] = "@(#)ansi.c 8.1 (Berkeley) 6/27/93";
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#else
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__RCSID("$NetBSD: multibyte.c,v 1.13 2001/10/09 10:21:48 yamt Exp $");
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#endif
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#endif /* LIBC_SCCS and not lint */
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#include "rune.h"
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#include <assert.h>
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#include <errno.h>
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#include <limits.h>
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#include <stddef.h>
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#include <stdlib.h>
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#include <string.h>
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#include <wchar.h>
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#include "rune_local.h"
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#define INIT0(state, rl, rlsrc) \
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do { \
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if (rl != rlsrc) { \
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if (state) \
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free(state); \
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state = NULL; \
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rl = rlsrc; \
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if (___rune_sizestate(rl)) \
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state = malloc(___rune_sizestate(rl)); \
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if (state && ___rune_initstate(rl)) \
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(*___rune_initstate(rl))(rl, state); \
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if (state) \
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*(_RuneLocale**)state = rl; \
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} \
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} while (/*CONSTCOND*/0)
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#define INIT(rl, state, state0, ps) \
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do { \
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if (___rune_sizestate(rl)) { \
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(state) = malloc(___rune_sizestate(rl)); \
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} else { \
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(state) = NULL; \
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} \
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if (state) { \
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memset((state), 0, ___rune_sizestate(rl)); \
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if (ps) { \
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if (___rune_unpackstate(rl)) { \
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(*___rune_unpackstate(rl))((rl), (state), (ps)); \
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} \
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} else if (state0) { \
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memcpy((state), (state0), ___rune_sizestate(rl)); \
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} else if (___rune_initstate(rl)) { \
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(*___rune_initstate(rl))((rl), (state)); \
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} \
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} \
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} while (/*CONSTCOND*/0)
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#define CLEANUP(rl, state, state0, ps) \
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do { \
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if ((state) && (ps) && ___rune_packstate(rl)) \
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(*___rune_packstate(rl))((rl), (ps), (state)); \
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if ((state) && (state0) && (state) != (state0)) \
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free(state); \
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} while (/*CONSTCOND*/0)
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static _RuneLocale *_mbstate_get_locale __P((const mbstate_t *));
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static void _mbstate_set_locale __P((mbstate_t *, const _RuneLocale *));
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static int _mbstate_init_locale __P((mbstate_t *, const _RuneLocale *));
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static void _mbstate_fixup __P((mbstate_t *));
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/*
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* check if mbstate is initialized or not.
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* if just zero'd, initialize with current locale.
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*
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* XXX should be merged with _mbstate_get_locale?
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*/
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static void
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_mbstate_fixup(ps)
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mbstate_t *ps;
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{
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_RuneLocale *rl;
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_DIAGASSERT(ps != NULL);
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/*LINTED*/
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rl = *(_RuneLocale **)ps;
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if (!rl) { /* XXX assuming null pointer is represented as zero */
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/*
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* perhaps ps is just zero'd.
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*/
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rl = _CurrentRuneLocale;
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if (___rune_initstate(rl)) {
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(*___rune_initstate(rl))((rl), ps);
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}
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_mbstate_set_locale(ps, rl);
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}
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}
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static _RuneLocale *
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_mbstate_get_locale(ps)
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const mbstate_t *ps;
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{
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_RuneLocale *rl;
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_DIAGASSERT(ps != NULL);
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/*LINTED disgusting const castaway can pointer cast */
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rl = *(_RuneLocale **)ps;
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if (!rl)
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rl = _CurrentRuneLocale;
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return rl;
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}
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static void
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_mbstate_set_locale(ps, rl)
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mbstate_t *ps;
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const _RuneLocale *rl;
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{
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_DIAGASSERT(ps != NULL);
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/* XXX: can rl be NULL ? */
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*(const _RuneLocale **)(void *)ps = rl;
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}
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static int
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_mbstate_init_locale(ps, rl)
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mbstate_t *ps;
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const _RuneLocale *rl;
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{
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_DIAGASSERT(ps != NULL);
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/* rl may be NULL */
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if (!rl)
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rl = _CurrentRuneLocale;
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if (*(_RuneLocale **)(void *)ps != rl) {
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memset(ps, 0, sizeof(*ps));
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return 0;
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} else
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return 1;
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}
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int
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mbsinit(ps)
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const mbstate_t *ps;
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{
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_RuneLocale *rl;
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static void *state0 = NULL;
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static _RuneLocale *rl0 = NULL;
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void *state = NULL;
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int r = 1;
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/* ps may be NULL */
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if (!ps)
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return r;
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_mbstate_fixup(*(mbstate_t**)&ps);
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rl = _mbstate_get_locale(ps);
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/* initialize the state */
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INIT0(state0, rl0, rl);
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INIT(rl0, state, state0, ps);
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if (state && state0 && ___rune_sizestate(rl0))
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r = !memcmp(state, state0, ___rune_sizestate(rl0));
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else
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r = 1;
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if (state) /* CLEANUP() cannot be used */
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free(state); /* because ps is const by spec. */
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return r;
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}
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size_t
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mbrlen(s, n, ps)
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const char *s;
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size_t n;
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mbstate_t *ps;
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{
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static mbstate_t ls;
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/* XXX: s may be NULL ? */
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/* ps may be NULL */
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if (!ps) {
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_mbstate_init_locale(&ls, NULL);
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ps = &ls;
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}
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return mbrtowc(NULL, s, n, ps);
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}
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int
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mblen(s, n)
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const char *s;
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size_t n;
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{
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static mbstate_t ls;
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size_t r;
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/* XXX: s may be NULL ? */
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if (___rune_initstate(_CurrentRuneLocale))
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___rune_initstate(_CurrentRuneLocale)(_CurrentRuneLocale, &ls);
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r = mbrlen(s, n, &ls);
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if (r == (size_t)-2) {
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errno = EILSEQ;
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return -1;
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}
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return (int)r;
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}
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size_t
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mbrtowc(pwc, s, n, ps)
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wchar_t *pwc;
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const char *s;
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size_t n;
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mbstate_t *ps;
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{
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static mbstate_t ls;
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_RuneLocale *rl;
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static void *state0 = NULL;
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static _RuneLocale *rl0 = NULL;
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void *state = NULL;
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size_t siz;
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/* pwc may be NULL */
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/* s may be NULL */
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/* ps may be NULL */
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if (!ps) {
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_mbstate_init_locale(&ls, NULL);
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ps = &ls;
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}
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_mbstate_fixup(ps);
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rl = _mbstate_get_locale(ps);
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/* initialize the state */
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INIT0(state0, rl0, rl);
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INIT(rl0, state, state0, ps);
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if (!s) {
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if (state && ___rune_initstate(rl0))
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(*___rune_initstate(rl0))(rl0, state);
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pwc = NULL;
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s = "";
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n = 1;
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}
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siz = (*___mbrtowc(rl0))(rl0, pwc, s, n, state);
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if (!siz) {
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if (state && ___rune_initstate(rl0))
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(*___rune_initstate(rl0))(rl0, state);
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}
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CLEANUP(rl0, state, state0, ps);
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return siz;
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}
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int
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mbtowc(pwc, s, n)
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wchar_t *pwc;
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const char *s;
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size_t n;
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{
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static mbstate_t ls;
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size_t r;
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/* pwc may be NULL */
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/* s may be NULL */
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if (___rune_initstate(_CurrentRuneLocale))
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___rune_initstate(_CurrentRuneLocale)(_CurrentRuneLocale, &ls);
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r = mbrtowc(pwc, s, n, &ls);
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if (r == (size_t)-2) {
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errno = EILSEQ;
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return -1;
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}
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return (int)r;
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}
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size_t
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wcrtomb(s, wchar, ps)
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char *s;
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wchar_t wchar;
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mbstate_t *ps;
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{
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static mbstate_t ls;
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static _RuneLocale *rl;
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static void *state0 = NULL;
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static _RuneLocale *rl0 = NULL;
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void *state = NULL;
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char buf[MB_LEN_MAX];
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size_t siz;
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/* s may be NULL */
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/* ps may be NULL */
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if (!ps) {
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_mbstate_init_locale(&ls, NULL);
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ps = &ls;
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}
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_mbstate_fixup(ps);
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rl = _mbstate_get_locale(ps);
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/* initialize the state */
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INIT0(state0, rl0, rl);
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INIT(rl0, state, state0, ps);
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if (!s) {
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if (state && ___rune_initstate(rl0))
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(*___rune_initstate(rl0))(rl0, state);
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s = buf;
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wchar = 0;
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}
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siz = (*___wcrtomb(rl0))(rl0, s, MB_LEN_MAX, wchar, state);
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CLEANUP(rl0, state, state0, ps);
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return siz;
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}
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int
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wctomb(s, wchar)
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char *s;
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wchar_t wchar;
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{
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static mbstate_t ls;
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/* s may be NULL */
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if (___rune_initstate(_CurrentRuneLocale))
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___rune_initstate(_CurrentRuneLocale)(_CurrentRuneLocale, &ls);
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return wcrtomb(s, wchar, &ls);
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}
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size_t
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mbsrtowcs(pwcs, s, n, ps)
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wchar_t *pwcs;
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const char **s;
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size_t n;
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mbstate_t *ps;
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{
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static mbstate_t ls;
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static _RuneLocale *rl;
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int cnt = 0;
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static void *state0 = NULL;
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static _RuneLocale *rl0 = NULL;
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void *state = NULL;
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size_t siz;
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const char *s0;
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/* pwcs may be NULL */
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/* s may be NULL */
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/* ps may be NULL */
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if (!ps) {
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_mbstate_init_locale(&ls, NULL);
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ps = &ls;
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}
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_mbstate_fixup(ps);
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rl = _mbstate_get_locale(ps);
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/* initialize the state */
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INIT0(state0, rl0, rl);
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INIT(rl0, state, state0, ps);
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if (s == 0 || *s == 0) {
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if (!ps) {
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cnt = -1;
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goto bye;
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}
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if (state && ___rune_initstate(rl0))
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(*___rune_initstate(rl0))(rl0, state);
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}
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if (!pwcs)
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n = 1;
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s0 = *s; /* to keep *s unchanged for now, use copy instead. */
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while (n > 0) {
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siz = (*___mbrtowc(rl0))(rl0, pwcs, s0, MB_CUR_MAX, state);
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switch (siz) {
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case (size_t)-1:
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errno = EILSEQ;
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cnt = -1;
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goto bye0;
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case (size_t)-2:
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/* redundant shift sequences? */
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s0 += MB_CUR_MAX;
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break;
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case 0:
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s0 = 0;
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goto bye0;
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default:
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if (pwcs) {
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pwcs++;
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n--;
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}
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cnt++;
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s0 += siz;
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break;
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}
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}
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bye0:
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if (pwcs)
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*s = s0;
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bye:
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CLEANUP(rl0, state, state0, ps);
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return (cnt);
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}
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size_t
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mbstowcs(pwcs, s, n)
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wchar_t *pwcs;
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const char *s;
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size_t n;
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{
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static mbstate_t ls;
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/* pwcs may be NULL */
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/* s may be NULL */
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if (___rune_initstate(_CurrentRuneLocale))
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___rune_initstate(_CurrentRuneLocale)(_CurrentRuneLocale, &ls);
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return mbsrtowcs(pwcs, &s, n, &ls);
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}
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size_t
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wcsrtombs(s, pwcs, n, ps)
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char *s;
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const wchar_t **pwcs;
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size_t n;
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mbstate_t *ps;
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{
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static mbstate_t ls;
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struct _RuneLocale *rl;
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int cnt = 0;
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static void *state0 = NULL;
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static _RuneLocale *rl0 = NULL;
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void *state = NULL;
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char buf[MB_LEN_MAX];
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size_t siz;
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const wchar_t* pwcs0;
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/* s may be NULL */
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/* pwcs may be NULL */
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/* ps may be NULL */
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if (!ps) {
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_mbstate_init_locale(&ls, NULL);
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ps = &ls;
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}
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_mbstate_fixup(ps);
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rl = _mbstate_get_locale(ps);
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/* initialize the state */
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INIT0(state0, rl0, rl);
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INIT(rl0, state, state0, ps);
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if (pwcs == 0 || *pwcs == 0) {
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if (!ps) {
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cnt = -1;
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goto bye;
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}
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if (state && ___rune_initstate(rl0))
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(*___rune_initstate(rl0))(rl0, state);
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}
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pwcs0 = *pwcs;
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while (1/*CONSTCOND*/) {
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siz = (*___wcrtomb(rl0))(rl0, buf, sizeof(buf), *pwcs0, state);
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if (siz == (size_t)-1) {
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errno = EILSEQ;
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return siz;
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}
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if (s) {
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if (n - cnt < siz)
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break;
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memcpy(s, buf, siz);
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}
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if (!*pwcs0) {
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pwcs0 = 0;
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break;
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}
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if (s)
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s += siz;
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cnt += siz;
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pwcs0++;
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}
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if (s)
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*pwcs = pwcs0;
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bye:
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CLEANUP(rl0, state, state0, ps);
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return (cnt);
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}
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size_t
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wcstombs(s, pwcs, n)
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char *s;
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const wchar_t *pwcs;
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size_t n;
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{
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static mbstate_t ls;
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/* s may be NULL */
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/* pwcs may be NULL */
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if (___rune_initstate(_CurrentRuneLocale))
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___rune_initstate(_CurrentRuneLocale)(_CurrentRuneLocale, &ls);
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return wcsrtombs(s, &pwcs, n, &ls);
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}
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