minix/lib/libc/citrus/modules/citrus_utf8.c
Ben Gras 2fe8fb192f Full switch to clang/ELF. Drop ack. Simplify.
There is important information about booting non-ack images in
docs/UPDATING. ack/aout-format images can't be built any more, and
booting clang/ELF-format ones is a little different. Updating to the
new boot monitor is recommended.

Changes in this commit:

	. drop boot monitor -> allowing dropping ack support
	. facility to copy ELF boot files to /boot so that old boot monitor
	  can still boot fairly easily, see UPDATING
	. no more ack-format libraries -> single-case libraries
	. some cleanup of OBJECT_FMT, COMPILER_TYPE, etc cases
	. drop several ack toolchain commands, but not all support
	  commands (e.g. aal is gone but acksize is not yet).
	. a few libc files moved to netbsd libc dir
	. new /bin/date as minix date used code in libc/
	. test compile fix
	. harmonize includes
	. /usr/lib is no longer special: without ack, /usr/lib plays no
	  kind of special bootstrapping role any more and bootstrapping
	  is done exclusively through packages, so releases depend even
	  less on the state of the machine making them now.
	. rename nbsd_lib* to lib*
	. reduce mtree
2012-02-14 14:52:02 +01:00

395 lines
9.5 KiB
C

/* $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>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: citrus_utf8.c,v 1.17 2008/06/14 16:01:08 tnozaki Exp $");
#endif /* LIBC_SCCS and not lint */
#include <assert.h>
#include <errno.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <wchar.h>
#include <sys/types.h>
#include <limits.h>
#include "citrus_namespace.h"
#include "citrus_types.h"
#include "citrus_module.h"
#include "citrus_ctype.h"
#include "citrus_stdenc.h"
#include "citrus_utf8.h"
/* ----------------------------------------------------------------------
* private stuffs used by templates
*/
static int _UTF8_count_array[256];
static int const *_UTF8_count = NULL;
static const u_int32_t _UTF8_range[] = {
0, /*dummy*/
0x00000000, 0x00000080, 0x00000800, 0x00010000,
0x00200000, 0x04000000, 0x80000000,
};
typedef struct {
char ch[6];
int chlen;
} _UTF8State;
typedef struct {
} _UTF8EncodingInfo;
typedef struct {
_UTF8EncodingInfo ei;
struct {
/* for future multi-locale facility */
_UTF8State s_mblen;
_UTF8State s_mbrlen;
_UTF8State s_mbrtowc;
_UTF8State s_mbtowc;
_UTF8State s_mbsrtowcs;
_UTF8State s_wcrtomb;
_UTF8State s_wcsrtombs;
_UTF8State s_wctomb;
} states;
} _UTF8CTypeInfo;
#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 _CTYPE_INFO _UTF8CTypeInfo
#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 __inline void
_UTF8_init_count(void)
{
int i;
if (!_UTF8_count) {
memset(_UTF8_count_array, 0, sizeof(_UTF8_count_array));
for (i = 0; i <= 0x7f; i++)
_UTF8_count_array[i] = 1;
for (i = 0xc0; i <= 0xdf; i++)
_UTF8_count_array[i] = 2;
for (i = 0xe0; i <= 0xef; i++)
_UTF8_count_array[i] = 3;
for (i = 0xf0; i <= 0xf7; i++)
_UTF8_count_array[i] = 4;
for (i = 0xf8; i <= 0xfb; i++)
_UTF8_count_array[i] = 5;
for (i = 0xfc; i <= 0xfd; i++)
_UTF8_count_array[i] = 6;
_UTF8_count = _UTF8_count_array;
}
}
static int
_UTF8_findlen(wchar_t v)
{
int i;
u_int32_t c;
c = (u_int32_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 int
_UTF8_surrogate(wchar_t wc)
{
return wc >= 0xd800 && wc <= 0xdfff;
}
static __inline void
/*ARGSUSED*/
_citrus_UTF8_init_state(_UTF8EncodingInfo *ei, _UTF8State *s)
{
s->chlen = 0;
}
static __inline void
/*ARGSUSED*/
_citrus_UTF8_pack_state(_UTF8EncodingInfo *ei, void *pspriv,
const _UTF8State *s)
{
memcpy(pspriv, (const void *)s, sizeof(*s));
}
static __inline void
/*ARGSUSED*/
_citrus_UTF8_unpack_state(_UTF8EncodingInfo *ei, _UTF8State *s,
const void *pspriv)
{
memcpy((void *)s, pspriv, sizeof(*s));
}
static int
_citrus_UTF8_mbrtowc_priv(_UTF8EncodingInfo *ei, wchar_t *pwc, const char **s,
size_t n, _UTF8State *psenc, size_t *nresult)
{
wchar_t wchar;
const char *s0;
int c;
int i;
_DIAGASSERT(nresult != 0);
_DIAGASSERT(s != NULL);
_DIAGASSERT(psenc != NULL);
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, char *s, size_t n, wchar_t wc,
_UTF8State *psenc, size_t *nresult)
{
int cnt, i, ret;
wchar_t c;
_DIAGASSERT(nresult != 0);
_DIAGASSERT(s != NULL);
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,
_csid_t * __restrict csid,
_index_t * __restrict idx,
wchar_t wc)
{
_DIAGASSERT(csid != NULL && idx != NULL);
*csid = 0;
*idx = (_citrus_index_t)wc;
return (0);
}
static __inline int
/*ARGSUSED*/
_citrus_UTF8_stdenc_cstowc(_UTF8EncodingInfo * __restrict ei,
wchar_t * __restrict wc,
_csid_t csid, _index_t idx)
{
_DIAGASSERT(wc != NULL);
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,
_UTF8State * __restrict psenc,
int * __restrict rstate)
{
if (psenc->chlen == 0)
*rstate = _STDENC_SDGEN_INITIAL;
else
*rstate = _STDENC_SDGEN_INCOMPLETE_CHAR;
return 0;
}
static int
/*ARGSUSED*/
_citrus_UTF8_encoding_module_init(_UTF8EncodingInfo * __restrict ei,
const void * __restrict var, size_t lenvar)
{
_UTF8_init_count();
return 0;
}
static void
/*ARGSUSED*/
_citrus_UTF8_encoding_module_uninit(_UTF8EncodingInfo *ei)
{
}
/* ----------------------------------------------------------------------
* public interface for ctype
*/
_CITRUS_CTYPE_DECLS(UTF8);
_CITRUS_CTYPE_DEF_OPS(UTF8);
#include "citrus_ctype_template.h"
/* ----------------------------------------------------------------------
* public interface for stdenc
*/
_CITRUS_STDENC_DECLS(UTF8);
_CITRUS_STDENC_DEF_OPS(UTF8);
#include "citrus_stdenc_template.h"