strw_comp.c

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/* wstring compare function */

#include "fb.h"

FBCALL int fb_WstrCompare( const FB_WCHAR *str1, const FB_WCHAR *str2 )
{
        int res;
        ssize_t str1_len, str2_len;

        /* both not null? */
        if( (str1 != NULL) && (str2 != NULL) )
        {
                str1_len = fb_wstr_Len( str1 );
        str2_len = fb_wstr_Len( str2 );

        res = fb_wstr_Compare( str1, str2, ((str1_len < str2_len) ? str1_len : str2_len) );
        if( (res == 0) && (str1_len != str2_len) )
                res = (( str1_len > str2_len ) ? 1 : -1 );

        return res;
        }

        /* left null? */
        if( str1 == NULL )
        {
                /* right also null? return eq */
                if( (str2 == NULL) || (fb_wstr_Len( str2 ) == 0) )
                        return 0;

                /* return lt */
                return -1;
        }

    /* only right is null. is left empty? return eq */
    if( fb_wstr_Len( str1 ) == 0 )
        return 0;

        /* return gt */
        return 1;
}