/*++

Copyright (C) 1999-2001 Microsoft Corporation

Module Name:

    STRUTILS.H

Abstract:

	String utilities

History:

--*/

#ifndef __WBEM_STRING_UTILS__H_
#define __WBEM_STRING_UTILS__H_

#pragma optimize("gt", on)

/*
inline int wbem_towlower(wint_t c)
{
    if(c >= 0 && c <= 127)
    {
        if(c >= 'A' && c <= 'Z')
            return c + ('a' - 'A');
        else
            return c;
    }
    else return towlower(c);
}
*/

#define wbem_towlower(C) \
    (((C) >= 0 && (C) <= 127)?          \
        (((C) >= 'A' && (C) <= 'Z')?          \
            ((C) + ('a' - 'A')):          \
            (C)          \
        ):          \
        towlower(C)          \
    )          

inline wchar_t wbem_towupper(wchar_t c)
{
    if(c >= 0 && c <= 127)
    {
        if(c >= 'a' && c <= 'z')
            return c + ('A' - 'a');
        else
            return c;
    }
    else return towupper(c);
}

inline int wbem_tolower(int c)
{
    if(c >= 0 && c <= 127)
    {
        if(c >= 'A' && c <= 'Z')
            return c + ('a' - 'A');
        else
            return c;
    }
    else return tolower(c);
}

inline int wbem_toupper(int c)
{
    if(c >= 0 && c <= 127)
    {
        if(c >= 'a' && c <= 'z')
            return c + ('A' - 'a');
        else
            return c;
    }
    else return toupper(c);
}

inline int wbem_wcsicmp( const wchar_t* wsz1, const wchar_t* wsz2)
{
    while(*wsz1 || *wsz2)
    {
        int diff = wbem_towlower(*wsz1) - wbem_towlower(*wsz2);
        if(diff) return diff;
        wsz1++; wsz2++;
    }

    return 0;
}

inline int wbem_unaligned_wcsicmp( UNALIGNED const wchar_t* wsz1, UNALIGNED const wchar_t* wsz2)
{
    while(*wsz1 || *wsz2)
    {
        int diff = wbem_towlower(*wsz1) - wbem_towlower(*wsz2);
        if(diff) return diff;
        wsz1++; wsz2++;
    }

    return 0;
}

// just like wcsicmp, but first 0 of unicode chracters have been omitted
inline int wbem_ncsicmp(const char* wsz1, const char* wsz2)
{
    while(*wsz1 || *wsz2)
    {
        int diff = wbem_towlower((unsigned char)*wsz1) - 
                    wbem_towlower((unsigned char)*wsz2);
        if(diff) return diff;
        wsz1++; wsz2++;
    }

    return 0;
}

inline int wbem_wcsnicmp( const wchar_t* wsz1, const wchar_t* wsz2, size_t n )
{
    while(n-- && (*wsz1 || *wsz2))
    {
        int diff = wbem_towlower(*wsz1) - wbem_towlower(*wsz2);
        if(diff) return diff;
        wsz1++; wsz2++;
    }

    return 0;
}

inline int wbem_unaligned_wcsnicmp( UNALIGNED const wchar_t* wsz1, UNALIGNED const wchar_t* wsz2, size_t n )
{
    while(n-- && (*wsz1 || *wsz2))
    {
        int diff = wbem_towlower(*wsz1) - wbem_towlower(*wsz2);
        if(diff) return diff;
        wsz1++; wsz2++;
    }

    return 0;
}

inline int wbem_stricmp(const char* sz1, const char* sz2)
{
    while(*sz1 || *sz2)
    {
        int diff = wbem_tolower(*sz1) - wbem_tolower(*sz2);
        if(diff) return diff;
        sz1++; sz2++;
    }

    return 0;
}

inline int wbem_strnicmp(const char* sz1, const char* sz2, size_t n)
{
    while(n-- && (*sz1 || *sz2))
    {
        int diff = wbem_tolower(*sz1) - wbem_tolower(*sz2);
        if(diff) return diff;
        sz1++; sz2++;
    }

    return 0;
}

#pragma optimize("", on)

#endif