374 lines
9.8 KiB
C
374 lines
9.8 KiB
C
|
/***
|
||
|
|
*xmbtowc.c - Convert multibyte char to wide char.
|
||
|
|
*
|
||
|
|
* Copyright (c) 1995-2001, Microsoft Corporation. All rights reserved.
|
||
|
|
*
|
||
|
|
*Purpose:
|
||
|
|
* Convert a multibyte character into the equivalent wide character.
|
||
|
|
*
|
||
|
|
*Revision History:
|
||
|
|
* 12-XX-95 PJP Created from mbtowc.c December 1995 by P.J. Plauger
|
||
|
|
* 04-17-96 GJF Updated for current locale locking. Also, reformatted
|
||
|
|
* and made several cosmetic changes.
|
||
|
|
* 09-25-96 GJF Made mbrlen, mbrtowc and mbsrtowcs multithread safe.
|
||
|
|
* 09-17-97 JWM Added "return MB_CUR_MAX" to "if (*pst != 0)" branch.
|
||
|
|
* 05-17-99 PML Remove all Macintosh support.
|
||
|
|
* 01-29-01 GB Added _func function version of data variable used in msvcprt.lib
|
||
|
|
* to work with STATIC_CPPLIB
|
||
|
|
*
|
||
|
|
*******************************************************************************/
|
||
|
|
|
||
|
|
#include <cruntime.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <mtdll.h>
|
||
|
|
#include <errno.h>
|
||
|
|
#include <dbgint.h>
|
||
|
|
#include <ctype.h>
|
||
|
|
#include <limits.h> /* for INT_MAX */
|
||
|
|
#include <stdio.h> /* for EOF */
|
||
|
|
#include <xlocinfo.h> /* for _Cvtvec, _Mbrtowc */
|
||
|
|
#include <internal.h>
|
||
|
|
#include <locale.h>
|
||
|
|
#include <setlocal.h>
|
||
|
|
|
||
|
|
#ifndef _MT
|
||
|
|
#define _Mbrtowc_lk _Mbrtowc
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/***
|
||
|
|
*int _Mbrtowc() - Convert multibyte char to wide character.
|
||
|
|
*
|
||
|
|
*Purpose:
|
||
|
|
* Convert a multi-byte character into the equivalent wide character,
|
||
|
|
* according to the specified LC_CTYPE category, or the current locale.
|
||
|
|
* [ANSI].
|
||
|
|
*
|
||
|
|
* NOTE: Currently, the C libraries support the "C" locale only.
|
||
|
|
* Non-C locale support now available under _INTL switch.
|
||
|
|
*Entry:
|
||
|
|
* wchar_t *pwc = pointer to destination wide character
|
||
|
|
* const char *s = pointer to multibyte character
|
||
|
|
* size_t n = maximum length of multibyte character to consider
|
||
|
|
* mbstate_t *pst = pointer to state
|
||
|
|
* const _Cvtvec * = pointer to locale info
|
||
|
|
*
|
||
|
|
*Exit:
|
||
|
|
* If s = NULL, returns 0, indicating we only use state-independent
|
||
|
|
* character encodings.
|
||
|
|
* If s != NULL, returns: 0 (if *s = null char)
|
||
|
|
* -1 (if the next n or fewer bytes not valid mbc)
|
||
|
|
* number of bytes comprising converted mbc
|
||
|
|
*
|
||
|
|
*Exceptions:
|
||
|
|
*
|
||
|
|
*******************************************************************************/
|
||
|
|
|
||
|
|
#ifdef _MT
|
||
|
|
static int __cdecl _Mbrtowc_lk
|
||
|
|
(
|
||
|
|
wchar_t *pwc,
|
||
|
|
const char *s,
|
||
|
|
size_t n,
|
||
|
|
mbstate_t *pst,
|
||
|
|
const _Cvtvec *ploc
|
||
|
|
);
|
||
|
|
|
||
|
|
int _CRTIMP2 __cdecl _Mbrtowc(
|
||
|
|
wchar_t *pwc,
|
||
|
|
const char *s,
|
||
|
|
size_t n,
|
||
|
|
mbstate_t *pst,
|
||
|
|
const _Cvtvec *ploc
|
||
|
|
)
|
||
|
|
{
|
||
|
|
int retval;
|
||
|
|
#ifdef _MT
|
||
|
|
int local_lock_flag;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
_lock_locale( local_lock_flag )
|
||
|
|
retval = _Mbrtowc_lk(pwc, s, n, pst, ploc);
|
||
|
|
_unlock_locale( local_lock_flag )
|
||
|
|
return retval;
|
||
|
|
}
|
||
|
|
#endif /* _MT */
|
||
|
|
#ifdef _MT
|
||
|
|
static int __cdecl _Mbrtowc_lk
|
||
|
|
#else /* _MT */
|
||
|
|
int _CRTIMP2 __cdecl _Mbrtowc
|
||
|
|
#endif /* _MT */
|
||
|
|
(
|
||
|
|
wchar_t *pwc,
|
||
|
|
const char *s,
|
||
|
|
size_t n,
|
||
|
|
mbstate_t *pst,
|
||
|
|
const _Cvtvec *ploc
|
||
|
|
)
|
||
|
|
{
|
||
|
|
_ASSERTE (___mb_cur_max_func() == 1 || ___mb_cur_max_func() == 2);
|
||
|
|
|
||
|
|
if ( !s || n == 0 )
|
||
|
|
/* indicate do not have state-dependent encodings,
|
||
|
|
handle zero length string */
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
if ( !*s )
|
||
|
|
{
|
||
|
|
/* handle NULL char */
|
||
|
|
if (pwc)
|
||
|
|
*pwc = 0;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
{ /* perform locale-dependent parse */
|
||
|
|
LCID handle;
|
||
|
|
UINT codepage;
|
||
|
|
|
||
|
|
if (ploc == 0)
|
||
|
|
{
|
||
|
|
handle = ___lc_handle_func()[LC_CTYPE];
|
||
|
|
codepage = ___lc_codepage_func();
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
handle = ploc->_Hand;
|
||
|
|
codepage = ploc->_Page;
|
||
|
|
}
|
||
|
|
|
||
|
|
if ( handle == _CLOCALEHANDLE )
|
||
|
|
{
|
||
|
|
if (pwc)
|
||
|
|
*pwc = (wchar_t)(unsigned char)*s;
|
||
|
|
return sizeof(char);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (*pst != 0)
|
||
|
|
{ /* complete two-byte multibyte character */
|
||
|
|
((char *)pst)[1] = *s;
|
||
|
|
if (___mb_cur_max_func() <= 1 || (MultiByteToWideChar(codepage,
|
||
|
|
MB_PRECOMPOSED|MB_ERR_INVALID_CHARS,
|
||
|
|
(char *)pst, 2, pwc, (pwc) ? 1 : 0) == 0))
|
||
|
|
{ /* translation failed */
|
||
|
|
*pst = 0;
|
||
|
|
errno = EILSEQ;
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
*pst = 0;
|
||
|
|
return ___mb_cur_max_func();
|
||
|
|
}
|
||
|
|
else if ( _cpp_isleadbyte((unsigned char)*s) )
|
||
|
|
{
|
||
|
|
/* multi-byte char */
|
||
|
|
if (n < (size_t)___mb_cur_max_func())
|
||
|
|
{ /* save partial multibyte character */
|
||
|
|
((char *)pst)[0] = *s;
|
||
|
|
return (-2);
|
||
|
|
}
|
||
|
|
else if ( ___mb_cur_max_func() <= 1 ||
|
||
|
|
(MultiByteToWideChar( codepage,
|
||
|
|
MB_PRECOMPOSED |
|
||
|
|
MB_ERR_INVALID_CHARS,
|
||
|
|
s,
|
||
|
|
___mb_cur_max_func(),
|
||
|
|
pwc,
|
||
|
|
(pwc) ? 1 : 0) == 0) )
|
||
|
|
{
|
||
|
|
/* validate high byte of mbcs char */
|
||
|
|
if (!*(s+1))
|
||
|
|
{
|
||
|
|
*pst = 0;
|
||
|
|
errno = EILSEQ;
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
/* else translation failed with no complaint? [pjp] */
|
||
|
|
}
|
||
|
|
return ___mb_cur_max_func();
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
/* single byte char */
|
||
|
|
|
||
|
|
if ( MultiByteToWideChar( codepage,
|
||
|
|
MB_PRECOMPOSED|MB_ERR_INVALID_CHARS,
|
||
|
|
s,
|
||
|
|
1,
|
||
|
|
pwc,
|
||
|
|
(pwc) ? 1 : 0) == 0 )
|
||
|
|
{
|
||
|
|
errno = EILSEQ;
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
return sizeof(char);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/***
|
||
|
|
*wint_t btowc(c) - translate single byte to wide char
|
||
|
|
*
|
||
|
|
*Purpose:
|
||
|
|
*
|
||
|
|
*Entry:
|
||
|
|
*
|
||
|
|
*Exit:
|
||
|
|
*
|
||
|
|
*Exceptions:
|
||
|
|
*
|
||
|
|
*******************************************************************************/
|
||
|
|
|
||
|
|
wint_t _CRTIMP2 __cdecl btowc (
|
||
|
|
int c
|
||
|
|
)
|
||
|
|
{
|
||
|
|
if (c == EOF)
|
||
|
|
return (WEOF);
|
||
|
|
else
|
||
|
|
{ /* convert as one-byte string */
|
||
|
|
char ch = (char)c;
|
||
|
|
mbstate_t mbst = 0;
|
||
|
|
wchar_t wc;
|
||
|
|
return (_Mbrtowc(&wc, &ch, 1, &mbst, 0) < 0 ? WEOF : wc);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/***
|
||
|
|
*size_t mbrlen(s, n, pst) - determine next multibyte code, restartably
|
||
|
|
*
|
||
|
|
*Purpose:
|
||
|
|
*
|
||
|
|
*Entry:
|
||
|
|
*
|
||
|
|
*Exit:
|
||
|
|
*
|
||
|
|
*Exceptions:
|
||
|
|
*
|
||
|
|
*******************************************************************************/
|
||
|
|
|
||
|
|
size_t _CRTIMP2 __cdecl mbrlen (
|
||
|
|
const char *s,
|
||
|
|
size_t n,
|
||
|
|
mbstate_t *pst
|
||
|
|
)
|
||
|
|
{
|
||
|
|
#ifdef _MT
|
||
|
|
int local_lock_flag;
|
||
|
|
#endif
|
||
|
|
size_t retval;
|
||
|
|
|
||
|
|
static mbstate_t mbst = {0};
|
||
|
|
|
||
|
|
_lock_locale( local_lock_flag )
|
||
|
|
retval = _Mbrtowc_lk(0, s != 0 ? s : 0, n, pst ? pst : &mbst, 0);
|
||
|
|
_unlock_locale( local_lock_flag )
|
||
|
|
|
||
|
|
return retval;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/***
|
||
|
|
*size_t mbrtowc(pwc, s, n, pst) - translate multibyte to wchar_t, restartably
|
||
|
|
*
|
||
|
|
*Purpose:
|
||
|
|
*
|
||
|
|
*Entry:
|
||
|
|
*
|
||
|
|
*Exit:
|
||
|
|
*
|
||
|
|
*Exceptions:
|
||
|
|
*
|
||
|
|
*******************************************************************************/
|
||
|
|
|
||
|
|
size_t _CRTIMP2 __cdecl mbrtowc (
|
||
|
|
wchar_t *pwc,
|
||
|
|
const char *s,
|
||
|
|
size_t n,
|
||
|
|
mbstate_t *pst
|
||
|
|
)
|
||
|
|
{
|
||
|
|
#ifdef _MT
|
||
|
|
int local_lock_flag;
|
||
|
|
#endif
|
||
|
|
size_t retval;
|
||
|
|
|
||
|
|
static mbstate_t mbst = {0};
|
||
|
|
|
||
|
|
_lock_locale( local_lock_flag )
|
||
|
|
retval = (s != 0) ? _Mbrtowc_lk(pwc, s, n, pst ? pst : &mbst, 0)
|
||
|
|
: _Mbrtowc_lk(0, "", n, pst ? pst : &mbst, 0);
|
||
|
|
_unlock_locale( local_lock_flag )
|
||
|
|
|
||
|
|
return retval;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/***
|
||
|
|
*size_t mbsrtowcs(wcs, ps, n, pst) - translate multibyte string to wide,
|
||
|
|
* restartably
|
||
|
|
*
|
||
|
|
*Purpose:
|
||
|
|
*
|
||
|
|
*Entry:
|
||
|
|
*
|
||
|
|
*Exit:
|
||
|
|
*
|
||
|
|
*Exceptions:
|
||
|
|
*
|
||
|
|
*******************************************************************************/
|
||
|
|
|
||
|
|
size_t _CRTIMP2 __cdecl mbsrtowcs (
|
||
|
|
wchar_t *wcs,
|
||
|
|
const char **ps,
|
||
|
|
size_t n,
|
||
|
|
mbstate_t *pst
|
||
|
|
)
|
||
|
|
{
|
||
|
|
const char *s = *ps;
|
||
|
|
int i;
|
||
|
|
size_t nwc = 0;
|
||
|
|
#ifdef _MT
|
||
|
|
int local_lock_flag;
|
||
|
|
#endif
|
||
|
|
static mbstate_t mbst = {0};
|
||
|
|
|
||
|
|
if (pst == 0)
|
||
|
|
pst = &mbst;
|
||
|
|
|
||
|
|
_lock_locale( local_lock_flag )
|
||
|
|
|
||
|
|
if (wcs == 0)
|
||
|
|
for (; ; ++nwc, s += i)
|
||
|
|
{ /* translate but don't store */
|
||
|
|
wchar_t wc;
|
||
|
|
if ((i = _Mbrtowc_lk(&wc, s, INT_MAX, pst, 0)) < 0) {
|
||
|
|
_unlock_locale( local_lock_flag )
|
||
|
|
return ((size_t)-1);
|
||
|
|
}
|
||
|
|
else if (i == 0) {
|
||
|
|
_unlock_locale( local_lock_flag )
|
||
|
|
return (nwc);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
for (; 0 < n; ++nwc, s += i, ++wcs, --n)
|
||
|
|
{ /* translate and store */
|
||
|
|
if ((i = _Mbrtowc_lk(wcs, s, INT_MAX, pst, 0)) < 0)
|
||
|
|
{ /* encountered invalid sequence */
|
||
|
|
nwc = (size_t)-1;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
else if (i == 0)
|
||
|
|
{ /* encountered terminating null */
|
||
|
|
s = 0;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
*ps = s;
|
||
|
|
|
||
|
|
_unlock_locale( local_lock_flag )
|
||
|
|
|
||
|
|
return (nwc);
|
||
|
|
}
|