You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
136 lines
4.0 KiB
136 lines
4.0 KiB
/***
|
|
*_mbslen.c - Return number of multibyte characters in a multibyte string
|
|
*
|
|
* Copyright (c) 1989-2001, Microsoft Corporation. All rights reserved.
|
|
*
|
|
*Purpose:
|
|
* Return number of multibyte characters in a multibyte string
|
|
* excluding the terminal null. Locale-dependent.
|
|
*
|
|
*Revision History:
|
|
* 10-01-91 ETC Created.
|
|
* 12-08-91 ETC Add multithread lock.
|
|
* 12-18-92 CFW Ported to Cuda tree, changed _CALLTYPE1 to _CRTAPI1.
|
|
* 04-29-93 CFW Change to const char *s.
|
|
* 06-01-93 CFW Test for bad MB chars.
|
|
* 06-02-93 SRW ignore _INTL if _NTSUBSET_ defined.
|
|
* 06-03-93 CFW Change name to avoid conflict with mbstring function.
|
|
* Change return type to size_t.
|
|
* 08-19-93 CFW Disallow skipping LB:NULL combos.
|
|
* 09-15-93 CFW Use ANSI conformant "__" names.
|
|
* 10-22-93 CFW Test for invalid MB chars using global preset flag.
|
|
* 01-14-94 SRW if _NTSUBSET_ defined call Rtl functions
|
|
* 09-06-94 CFW Remove _INTL switch.
|
|
* 12-21-94 CFW Remove invalid MB chars NT 3.1 hack.
|
|
* 02-06-95 CFW assert -> _ASSERTE.
|
|
* 09-26-95 GJF New locking macro, and scheme, for functions which
|
|
* reference the locale.
|
|
* 04-01-96 BWT POSIX work.
|
|
* 06-21-96 GJF Purged DLL_FOR_WIN32S. Polished format a bit.
|
|
* 07-16-96 SKS Added missing call to _unlock_locale()
|
|
* 02-27-98 RKP Added 64 bit support.
|
|
* 07-22-98 GJF Revised multithread support based on threadlocinfo
|
|
* struct.
|
|
*
|
|
*******************************************************************************/
|
|
|
|
#if defined(_NTSUBSET_) || defined(_POSIX_)
|
|
#include <nt.h>
|
|
#include <ntrtl.h>
|
|
#include <nturtl.h>
|
|
#endif
|
|
#include <cruntime.h>
|
|
#include <internal.h>
|
|
#include <stdlib.h>
|
|
#include <ctype.h>
|
|
#include <mtdll.h>
|
|
#include <locale.h>
|
|
#include <setlocal.h>
|
|
#include <dbgint.h>
|
|
|
|
/***
|
|
*_mbstrlen - Return number of multibyte characters in a multibyte string
|
|
*
|
|
*Purpose:
|
|
* Return number of multibyte characters in a multibyte string
|
|
* excluding the terminal null. Locale-dependent.
|
|
*
|
|
*Entry:
|
|
* char *s = string
|
|
*
|
|
*Exit:
|
|
* Returns the number of multibyte characters in the string, or
|
|
* (size_t)-1 if the string contains an invalid multibyte character.
|
|
*
|
|
*Exceptions:
|
|
*
|
|
*******************************************************************************/
|
|
|
|
size_t __cdecl _mbstrlen(
|
|
const char *s
|
|
)
|
|
{
|
|
size_t n;
|
|
#ifdef _MT
|
|
pthreadlocinfo ptloci = _getptd()->ptlocinfo;
|
|
|
|
if ( ptloci != __ptlocinfo )
|
|
ptloci = __updatetlocinfo();
|
|
#endif
|
|
|
|
_ASSERTE (MB_CUR_MAX == 1 || MB_CUR_MAX == 2);
|
|
|
|
#ifdef _MT
|
|
if ( ptloci->mb_cur_max == 1 )
|
|
#else
|
|
if ( MB_CUR_MAX == 1 )
|
|
#endif
|
|
/* handle single byte character sets */
|
|
return (int)strlen(s);
|
|
|
|
#if !defined(_NTSUBSET_) && !defined(_POSIX_)
|
|
|
|
/* verify all valid MB chars */
|
|
#ifdef _MT
|
|
if ( MultiByteToWideChar( ptloci->lc_codepage,
|
|
#else
|
|
if ( MultiByteToWideChar( __lc_codepage,
|
|
#endif
|
|
MB_PRECOMPOSED | MB_ERR_INVALID_CHARS,
|
|
s,
|
|
-1,
|
|
NULL,
|
|
0 ) == 0 )
|
|
{
|
|
/* bad MB char */
|
|
return (size_t)-1;
|
|
}
|
|
|
|
/* count MB chars */
|
|
for (n = 0; *s; n++, s++) {
|
|
#ifdef _MT
|
|
if ( __isleadbyte_mt(ptloci, (unsigned char)*s) ) {
|
|
#else
|
|
if ( isleadbyte((unsigned char)*s) ) {
|
|
#endif
|
|
if (*++s == '\0')
|
|
break;
|
|
}
|
|
}
|
|
|
|
#else
|
|
|
|
{
|
|
char *s1 = (char *)s;
|
|
|
|
|
|
while (RtlAnsiCharToUnicodeChar( &s1 ) != UNICODE_NULL)
|
|
;
|
|
|
|
n = s1 - s;
|
|
}
|
|
|
|
#endif
|
|
|
|
return(n);
|
|
}
|