strw_instrrevany.c

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/* instrrevanyw function */

#include "fb.h"

FBCALL ssize_t fb_WstrInstrRevAny( const FB_WCHAR *src, const FB_WCHAR *patt, ssize_t start )
{
        if( (src != NULL) && (patt != NULL) ) 
        {
                ssize_t size_src = fb_wstr_Len(src);
                ssize_t size_patt = fb_wstr_Len(patt);
                ssize_t i;

                if( (size_src != 0) && (size_patt != 0) && (start != 0))
                {
                        if( start < 0 )
                                start = size_src;
                        else if( start > size_src )
                                start = 0;

                        while( start-- )
                        {
                                for( i = 0; i != size_patt; ++i )
                                        if( src[start] == patt[i] )
                                                return start + 1;
                        }
                }
        }

        return 0;
}