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StringFormat.xs  view on Meta::CPAN

static OP*
sf_pp_modulo(pTHX){
	dVAR; dSP;
	SV* lhs = TOPm1s; /* top minus 1 scalar */
	SV* rhs = TOPs;

	if( my_SvPOK(lhs) ){
		dTARGET;
		STRLEN len;
		const char* start = SvPV_const(lhs, len);
		register const char* p     = start;
		register const char* end   = start + len;

		bool maybe_tainted = FALSE; /* maybe not used */

		/* start of formatter */
		while(p < end){
			if(*p == '%'){
				p++;
				if(*p != '%'){
					break;
				}
			}
			p++;
		}
		if(p == end && ckWARN(WARN_PRINTF)){

StringFormat.xs  view on Meta::CPAN

					p++;
				}
				else{
					break;
				}
			}
			p++;
		}

#if 0
		printf("#%s\n#", start);
		{
			int i;
			for(i = 0; i < (p - start); i++){
				printf(" ");
			}
			printf("^\n");
		}
#endif

		sv_vsetpvfn(TARG, start, (STRLEN)(p - start), NULL, &rhs, 1, &maybe_tainted);

		if(end != p) sv_catpvn(TARG, p, (STRLEN)(end - p));

		if(SvTAINTED(lhs)) SvTAINTED_on(TARG);
		if(SvUTF8(lhs))    SvUTF8_on(TARG);

		if(opASSIGN){
			sv_setsv(lhs, TARG);
			TARG = lhs;
		}