str_instrrevany.c

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/* instrrev function */

#include "fb.h"

FBCALL ssize_t fb_StrInstrRevAny( FBSTRING *src, FBSTRING *patt, ssize_t start )
{
        ssize_t r = 0;

        if( (src != NULL) && (src->data != NULL) && (patt != NULL) && (patt->data != NULL) ) 
        {
                ssize_t size_src = FB_STRSIZE(src);
                ssize_t size_patt = FB_STRSIZE(patt);

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

                        while( start-- && (r == 0) )
                        {
                                ssize_t i;
                                for( i = 0; i != size_patt; ++i )
                                {
                                        if( src->data[start] == patt->data[i] )
                                        {       
                                                r = start + 1;
                                                break;
                                        }
                                }
                        }
                }
        }

        FB_STRLOCK();

        /* del if temp */
        fb_hStrDelTemp_NoLock( src );
        fb_hStrDelTemp_NoLock( patt );

        FB_STRUNLOCK();

        return r;
}