minix/lib/libc/citrus/modules/citrus_utf1632.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

486 lines
10 KiB
C

/* $NetBSD: citrus_utf1632.c,v 1.11 2010/03/20 18:15:32 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>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: citrus_utf1632.c,v 1.11 2010/03/20 18:15:32 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 <limits.h>
#include <wchar.h>
#include <sys/types.h>
#include <machine/endian.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 {
u_int8_t ch[4];
int chlen;
int current_endian;
} _UTF1632State;
typedef struct {
int preffered_endian;
unsigned int cur_max;
#define _ENDIAN_UNKNOWN 0
#define _ENDIAN_BIG 1
#define _ENDIAN_LITTLE 2
u_int32_t mode;
#define _MODE_UTF32 0x00000001U
#define _MODE_FORCE_ENDIAN 0x00000002U
} _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, _UTF1632State *s)
{
memset(s, 0, sizeof(*s));
}
static int
_citrus_UTF1632_mbrtowc_priv(_UTF1632EncodingInfo *ei, wchar_t *pwc,
const char **s, size_t n, _UTF1632State *psenc,
size_t *nresult)
{
int chlenbak, endian, needlen;
wchar_t wc;
size_t result;
const char *s0;
_DIAGASSERT(nresult != 0);
_DIAGASSERT(ei != NULL);
_DIAGASSERT(s != NULL);
_DIAGASSERT(psenc != NULL);
s0 = *s;
if (s0 == NULL) {
_citrus_UTF1632_init_state(ei, psenc);
*nresult = 0; /* state independent */
return (0);
}
result = 0;
chlenbak = psenc->chlen;
refetch:
if ((ei->mode & _MODE_UTF32) != 0 || chlenbak>=2)
needlen = 4;
else
needlen = 2;
while (chlenbak < needlen) {
if (n==0)
goto restart;
psenc->ch[chlenbak++] = *s0++;
n--;
result++;
}
if (psenc->current_endian == _ENDIAN_UNKNOWN) {
if ((ei->mode & _MODE_FORCE_ENDIAN) == 0) {
/* 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;
}
}
}
psenc->current_endian = ei->preffered_endian;
}
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)
{
int ret;
wchar_t wc2;
static const char _bom[4] = {
#if BYTE_ORDER == BIG_ENDIAN
0x00, 0x00, 0xFE, 0xFF,
#else
0xFF, 0xFE, 0x00, 0x00,
#endif
};
const char *bom = &_bom[0];
size_t cnt;
_DIAGASSERT(ei != NULL);
_DIAGASSERT(nresult != 0);
_DIAGASSERT(s != NULL);
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;
#if BYTE_ORDER == BIG_ENDIAN
bom += 2;
#endif
}
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)
{
#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)
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 '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)
{
_DIAGASSERT(ei != NULL);
memset((void *)ei, 0, sizeof(*ei));
parse_variable(ei, var, lenvar);
if ((ei->mode&_MODE_UTF32)==0)
ei->cur_max = 6; /* endian + surrogate */
else
ei->cur_max = 8; /* endian + normal */
if (ei->preffered_endian == _ENDIAN_UNKNOWN) {
#if BYTE_ORDER == BIG_ENDIAN
ei->preffered_endian = _ENDIAN_BIG;
#else
ei->preffered_endian = _ENDIAN_LITTLE;
#endif
}
return (0);
}
static void
/*ARGSUSED*/
_citrus_UTF1632_encoding_module_uninit(_UTF1632EncodingInfo *ei)
{
}
static __inline int
/*ARGSUSED*/
_citrus_UTF1632_stdenc_wctocs(_UTF1632EncodingInfo * __restrict ei,
_csid_t * __restrict csid,
_index_t * __restrict idx,
_wc_t wc)
{
_DIAGASSERT(csid != NULL && idx != NULL);
*csid = 0;
*idx = (_index_t)wc;
return (0);
}
static __inline int
/*ARGSUSED*/
_citrus_UTF1632_stdenc_cstowc(_UTF1632EncodingInfo * __restrict ei,
_wc_t * __restrict wc,
_csid_t csid, _index_t idx)
{
_DIAGASSERT(wc != NULL);
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,
_UTF1632State * __restrict psenc,
int * __restrict rstate)
{
if (psenc->chlen == 0)
*rstate = _STDENC_SDGEN_INITIAL;
else
*rstate = _STDENC_SDGEN_INCOMPLETE_CHAR;
return 0;
}
/* ----------------------------------------------------------------------
* public interface for stdenc
*/
_CITRUS_STDENC_DECLS(UTF1632);
_CITRUS_STDENC_DEF_OPS(UTF1632);
#include "citrus_stdenc_template.h"