#include "compose.h"#include <ctype.h> enum {	Or	= -1,	Bad	= ~0,}; struct {	char	*s;	ulong	op;} tab[] = {	"Clear",		Clear,	"SinD",		SinD,	"DinS",		DinS,	"SoutD",		SoutD,	"DoutS",		DoutS, 	"S",		SinD|SoutD,	"SoverD",	SinD|SoutD|DoutS,	"SatopD",	SinD|DoutS,	"SxorD",		SoutD|DoutS, 	"D",		DinS|DoutS,	"DoverS",	DinS|DoutS|SoutD,	"DatopS",	DinS|SoutD,	"DxorS",		DoutS|SoutD,	/* == SxorD */}; ulongstrtoop(char *s){	char *s0;	int i, l;	ulong op; 	op = 0;	s0 = s;	for(;;){		while(*s && isspace(*s))			s++;		if((l = strcspn(s, " |")) == 0)			break;		for(i = 0; i < nelem(tab); i++)			if(cistrncmp(tab[i].s, s, l) == 0)				break;		if(i == nelem(tab))			return Bad;		op |= tab[i].op;		s += l;		while(*s && isspace(*s))			s++;		if(*s != '|')			break;		s++;	}	if(*s != 0 || s0 == s)		return Bad;	return op;}