strw_right.c

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/* rightw$ function */

#include "fb.h"

FBCALL FB_WCHAR *fb_WstrRight( const FB_WCHAR *src, ssize_t chars )
{
        FB_WCHAR *dst;
        ssize_t len, src_len;

        if( src == NULL )
                return NULL;

        src_len = fb_wstr_Len( src );
        if( (chars <= 0) || (src_len == 0) )
                return NULL;

        if( chars > src_len )
                len = src_len;
        else
                len = chars;

        /* alloc temp string */
    dst = fb_wstr_AllocTemp( len );
        if( dst != NULL )
        {
                /* simple rev copy */
                fb_wstr_Copy( dst, &src[src_len - len], len );
        }

        return dst;
}