mbschr.cpp File Reference

#include <corecrt_internal_mbstring.h>
#include <locale.h>
#include <stddef.h>
#include <string.h>

Include dependency graph for mbschr.cpp:

Go to the source code of this file.

Functions
_CONST_RETURN unsigned char *__cdecl	_mbschr_l (const unsigned char *string, unsigned int c, _locale_t plocinfo)
_CONST_RETURN unsigned char *__cdecl	_mbschr (const unsigned char *string, unsigned int c)

Function Documentation

_mbschr()

_CONST_RETURN unsigned char *__cdecl _mbschr	(	const unsigned char *	string,
		unsigned int	c
	)

Definition at line 78 of file mbschr.cpp.

{
    return _mbschr_l(string, c, nullptr);
}

_mbschr_l()

_CONST_RETURN unsigned char *__cdecl _mbschr_l	(	const unsigned char *	string,
		unsigned int	c,
		_locale_t	plocinfo
	)

Definition at line 44 of file mbschr.cpp.

{
        unsigned short cc = '\0';
        _LocaleUpdate _loc_update(plocinfo);
 
        /* validation section */
        _VALIDATE_RETURN(string != nullptr, EINVAL, nullptr);
 
        if (_loc_update.GetLocaleT()->mbcinfo->ismbcodepage == 0)
            return (_CONST_RETURN unsigned char *)strchr((const char *)string, (int)c);
 
        for (; (cc = *string) != '\0'; string++)
        {
            if ( _ismbblead_l(cc, _loc_update.GetLocaleT()) )
            {
                if (*++string == '\0')
                    return nullptr;        /* error */
                if ( c == (unsigned int)((cc << 8) | *string) ) /* DBCS match */
                    return (unsigned char *)(string - 1);
            }
            else if (c == (unsigned int)cc)
                break;  /* SBCS match */
        }
 
        if (c == (unsigned int)cc)      /* check for SBCS match--handles NUL char */
            return (unsigned char *)(string);
 
        return nullptr;
}

Referenced by _mbschr().