+
+static char sccsid[] = " quiz.c 4.1 82/10/24 ";
+
+#include <stdio.h>
+#include <signal.h>
+#define NF 10
+#define NL 300
+#define NC 200
+#define SL 100
+#define NA 10
+
+int tflag;
+int xx[NL];
+char score[NL];
+int rights;
+int wrongs;
+int guesses;
+FILE *input;
+int nl = 0;
+int na = NA;
+int inc;
+int ptr = 0;
+int nc = 0;
+char line[150];
+char response[100];
+char *tmp[NF];
+int select[NF];
+
+readline()
+{
+ char *t;
+loop:
+ for(t=line;(*t=getc(input))!=-1;t++) {
+ nc++;
+ if(*t==' '&&(t==line||t[-1]==' '))
+ t--;
+ if(*t=='\n') {
+ if(t[-1]=='\\') /*inexact test*/
+ continue;
+ while(t>line&&t[-1]==' ')
+ *--t = '\n';
+ *++t = 0;
+ return(1);
+ }
+ if(t-line>=NC) {
+ printf("Too hard for me\n");
+ do {
+ *line = getc(input);
+ if(*line==0377)
+ return(0);
+ } while(*line!='\n');
+ goto loop;
+ }
+ }
+ return(0);
+}
+
+char *eu;
+char *ev;
+cmp(u,v)
+char *u,*v;
+{
+ int x;
+ eu = u;
+ ev = v;
+ x = disj(1);
+ if(x!=1)
+ return(x);
+ return(eat(1,0));
+}
+
+disj(s)
+{
+ int t, x;
+ char *u;
+ u = eu;
+ t = 0;
+ for(;;) {
+ x = string(s);
+ if(x>1)
+ return(x);
+ switch(*ev) {
+ case 0:
+ case ']':
+ case '}':
+ return(t|x&s);
+ case '|':
+ ev++;
+ t |= s;
+ s = 0;
+ continue;
+ }
+ if(s) eu = u;
+ if(string(0)>1)
+ return(2);
+ switch(*ev) {
+ case 0:
+ case ']':
+ return(0);
+ case '}':
+ return(1);
+ case '|':
+ ev++;
+ continue;
+ default:
+ return(2);
+ }
+ }
+}
+
+string(s)
+{
+ int x;
+ for(;;) {
+ switch(*ev) {
+ case 0:
+ case '|':
+ case ']':
+ case '}':
+ return(1);
+ case '\\':
+ ev++;
+ if(*ev==0)
+ return(2);
+ if(*ev=='\n') {
+ ev++;
+ continue;
+ }
+ default:
+ if(eat(s,*ev)==1)
+ continue;
+ return(0);
+ case '[':
+ ev++;
+ x = disj(s);
+ if(*ev!=']' || x>1)
+ return(2);
+ ev++;
+ if(s==0)
+ continue;
+ if(x==0)
+ return(0);
+ continue;
+ case '{':
+ ev++;
+ x = disj(s);
+ if(*ev!='}'||x>1)
+ return(2);
+ ev++;
+ continue;
+ }
+ }
+}
+
+eat(s,c)
+char c;
+{
+ if(*ev!=c)
+ return(2);
+ if(s==0) {
+ ev++;
+ return(1);
+ }
+ if(fold(*eu)!=fold(c))
+ return(0);
+ eu++;
+ ev++;
+ return(1);
+}
+
+fold(c)
+char c;
+{
+ if(c<'A'||c>'Z')
+ return(c);
+ return(c|040);
+}
+
+publish(t)
+char *t;
+{
+ ev = t;
+ pub1(1);
+}
+
+pub1(s)
+{
+ for(;;ev++){
+ switch(*ev) {
+ case '|':
+ s = 0;
+ ev;
+ continue;
+ case ']':
+ case '}':
+ case 0:
+ return;
+ case '[':
+ case '{':
+ ev++;
+ pub1(s);
+ ev;
+ continue;
+ case '\\':
+ if(*++ev=='\n')
+ continue;
+ default:
+ if(s)
+ putchar(*ev);
+ }
+ }
+}
+
+segment(u,w)
+char *u, *w[];
+{
+ char *s;
+ int i;
+ char *t;
+ s = u;
+ for(i=0;i<NF;i++) {
+ u = s;
+ t = w[i];
+ while(*s!=':'&&*s!='\n'&&s-u<SL) {
+ if(*s=='\\') {
+ if(s[1] == '\n') {
+ s += 2;
+ continue;
+ }
+ *t++ = *s++;
+ }
+ *t++ = *s++;
+ }
+
+ while(*s!=':'&&*s!='\n')
+ s++;
+ *t = 0;
+ if(*s++=='\n') {
+ return(i+1);
+ }
+ }
+ printf("Too many facts about one thing\n");
+}
+
+perm(u,m,v,n,p)
+int p[];
+char *u[], *v[];
+{
+ int i, j;
+ int x;
+ for(i=0;i<m;i++) {
+ for(j=0;j<n;j++) {
+ x = cmp(u[i],v[j]);
+ if(x>1) badinfo();
+ if(x==0)
+ continue;
+ p[i] = j;
+ goto uloop;
+ }
+ return(0);
+uloop: ;
+ }
+ return(1);
+}
+
+find(u,m)
+char *u[];
+{
+ int n;
+ while(readline()){
+ n = segment(line,tmp);
+ if(perm(u,m,tmp+1,n-1,select))
+ return(1);
+ }
+ return(0);
+}
+
+readindex()
+{
+ xx[0] = nc = 0;
+ while(readline()) {
+ xx[++nl] = nc;
+ if(nl>=NL) {
+ printf("I've forgotten some of it;\n");
+ printf("I remember %d items.\n", nl);
+ break;
+ }
+ }
+}
+
+talloc()
+{
+ int i;
+ for(i=0;i<NF;i++)
+ tmp[i] = malloc(SL);
+}
+
+main(argc,argv)
+char *argv[];
+{
+ register j;
+ int i;
+ int x;
+ int z;
+ char *info;
+ int tvec[2];
+ char *t;
+ extern done();
+ int count;
+ info = "/usr/games/lib/quiz.k/index";
+ time(tvec);
+ inc = tvec[1]&077774|01;
+loop:
+ if(argc>1&&*argv[1]=='-') {
+ switch(argv[1][1]) {
+ case 'i':
+ if(argc>2)
+ info = argv[2];
+ argc -= 2;
+ argv += 2;
+ goto loop;
+ case 't':
+ tflag = 1;
+ argc--;
+ argv++;
+ goto loop;
+ }
+ }
+ input = fopen(info,"r");
+ if(input==NULL) {
+ printf("No info\n");
+ exit(0);
+ }
+ talloc();
+ if(argc<=2)
+ instruct(info);
+ signal(SIGINT,done);
+ argv[argc] = 0;
+ if(find(&argv[1],argc-1)==0)
+ dunno();
+ fclose(input);
+ input = fopen(tmp[0],"r");
+ if(input==NULL)
+ dunno();
+ readindex();
+ if(!tflag || na>nl)
+ na = nl;
+ stdout->_flag |= _IONBF;
+ for(;;) {
+ i = next();
+ fseek(input,xx[i]+0L,0);
+ z = xx[i+1]-xx[i];
+ for(j=0;j<z;j++)
+ line[j] = getc(input);
+ segment(line,tmp);
+ if(*tmp[select[0]] == '\0' || *tmp[select[1]] == '\0') {
+ score[i] = 1;
+ continue;
+ }
+ publish(tmp[select[0]]);
+ printf("\n");
+ for(count=0;;count++) {
+ if(query(response)==0) {
+ publish(tmp[select[1]]);
+ printf("\n");
+ if(count==0) wrongs++;
+ score[i] = tflag?-1:1;
+ break;
+ }
+ x = cmp(response,tmp[select[1]]);
+ if(x>1) badinfo();
+ if(x==1) {
+ printf("Right!\n");
+ if(count==0) rights++;
+ if(++score[i]>=1 && na<nl)
+ na++;
+ break;
+ }
+ printf("What?\n");
+ if(count==0) wrongs++;
+ score[i] = tflag?-1:1;
+ }
+ guesses += count;
+ }
+}
+
+query(r)
+char *r;
+{
+ char *t;
+ for(t=r;;t++) {
+ if(read(0,t,1)==0)
+ done();
+ if(*t==' '&&(t==r||t[-1]==' '))
+ t--;
+ if(*t=='\n') {
+ while(t>r&&t[-1]==' ')
+ *--t = '\n';
+ break;
+ }
+ }
+ *t = 0;
+ return(t-r);
+}
+
+next()
+{
+ int flag;
+ inc = inc*3125&077777;
+ ptr = (inc>>2)%na;
+ flag = 0;
+ while(score[ptr]>0)
+ if(++ptr>=na) {
+ ptr = 0;
+ if(flag) done();
+ flag = 1;
+ }
+ return(ptr);
+}
+
+done()
+{
+ printf("\nRights %d, wrongs %d, ", rights, wrongs);
+ if(guesses)
+ printf("extra guesses %d, ", guesses);
+ printf("score %d%%\n",100*rights/(rights+wrongs));
+ exit(0);
+}
+instruct(info)
+{
+ char *t;
+ int i, n;
+ printf("Subjects:\n\n");
+ while(readline()) {
+ printf("-");
+ n = segment(line,tmp);
+ for(i=1;i<n;i++) {
+ printf(" ");
+ publish(tmp[i]);
+ }
+ printf("\n");
+ }
+ printf("\n");
+ input = fopen(info,"r");
+ if(input==NULL)
+ abort();
+ readline();
+ segment(line,tmp);
+ printf("For example,\n");
+ printf(" quiz ");
+ publish(tmp[1]);
+ printf(" ");
+ publish(tmp[2]);
+ printf("\nasks you a ");
+ publish(tmp[1]);
+ printf(" and you answer the ");
+ publish(tmp[2]);
+ printf("\n quiz ");
+ publish(tmp[2]);
+ printf(" ");
+ publish(tmp[1]);
+ printf("\nworks the other way around\n");
+ printf("\nType empty line to get correct answer.\n");
+ exit(0);
+}
+
+badinfo(){
+ printf("Bad info %s\n",line);
+}
+
+dunno()
+{
+ printf("I don't know about that\n");
+ exit(0);
+}
projects / unix-history / commitdiff