strxfrm.cpp File Reference

#include <corecrt_internal.h>
#include <ctype.h>
#include <locale.h>
#include <string.h>

Include dependency graph for strxfrm.cpp:

Go to the source code of this file.

Functions
size_t __cdecl	_strxfrm_l (char *_string1, const char *_string2, size_t _count, _locale_t plocinfo)
size_t __cdecl	strxfrm (char *_string1, const char *_string2, size_t _count)

Function Documentation

_strxfrm_l()

size_t __cdecl _strxfrm_l	(	char *	_string1,
		const char *	_string2,
		size_t	_count,
		_locale_t	plocinfo
	)

Definition at line 55 of file strxfrm.cpp.

{
    int dstlen;
    size_t retval = INT_MAX;   /* NON-ANSI: default if OM or API error */
    _LocaleUpdate _loc_update(plocinfo);
 
    /* validation section */
    _VALIDATE_RETURN(_count <= INT_MAX, EINVAL, INT_MAX);
    _VALIDATE_RETURN(_string1 != nullptr || _count == 0, EINVAL, INT_MAX);
    _VALIDATE_RETURN(_string2 != nullptr, EINVAL, INT_MAX);
 
    /* pre-init output in case of error */
    if(_string1!=nullptr && _count>0)
    {
        *_string1='\0';
    }
 
    if ( (_loc_update.GetLocaleT()->locinfo->locale_name[LC_COLLATE] == nullptr) &&
            (_loc_update.GetLocaleT()->locinfo->lc_collate_cp == CP_ACP) )
    {
_BEGIN_SECURE_CRT_DEPRECATION_DISABLE
        strncpy(_string1, _string2, _count);
_END_SECURE_CRT_DEPRECATION_DISABLE
        return strlen(_string2);
    }
 
    /* Inquire size of dst string in BYTES */
    if ( 0 == (dstlen = __acrt_LCMapStringA(
                    _loc_update.GetLocaleT(),
                    _loc_update.GetLocaleT()->locinfo->locale_name[LC_COLLATE],
                    LCMAP_SORTKEY,
                    _string2,
                    -1,
                    nullptr,
                    0,
                    _loc_update.GetLocaleT()->locinfo->lc_collate_cp,
                    TRUE )) )
    {
        errno = EILSEQ;
        return INT_MAX;
    }
 
    retval = (size_t)dstlen;
 
    /* if not enough room, return amount needed */
    if ( retval > _count )
    {
        if (_string1 != nullptr && _count > 0)
        {
            *_string1 = '\0';
            errno = ERANGE;
        }
        /* the return value is the string length (without the terminating 0) */
        retval--;
        return retval;
    }
 
    /* Map src string to dst string */
    if ( 0 == __acrt_LCMapStringA(
                _loc_update.GetLocaleT(),
                _loc_update.GetLocaleT()->locinfo->locale_name[LC_COLLATE],
                LCMAP_SORTKEY,
                _string2,
                -1,
                _string1,
                (int)_count,
                _loc_update.GetLocaleT()->locinfo->lc_collate_cp,
                TRUE ) )
    {
        errno = EILSEQ;
        return INT_MAX;
    }
    /* the return value is the string length (without the terminating 0) */
    retval--;
 
    return retval;
}

Referenced by strxfrm().

strxfrm()

size_t __cdecl strxfrm	(	char *	_string1,
		const char *	_string2,
		size_t	_count
	)

Definition at line 138 of file strxfrm.cpp.

{
 
    return _strxfrm_l(_string1, _string2, _count, nullptr);
 
}