Source:Hack 1.0/hack.whatis.c

Below is the full text to hack.whatis.c from the source code of Hack 1.0. To link to a particular line, write [[Hack 1.0/hack.whatis.c#line123]], for example.

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1.    /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1984. */
2.    
3.    #include	<stdio.h>
4.    #include "hack.h"
5.    
6.    dowhatis(str)
7.    register char *str;
8.    {
9.    	FILE *fp;
10.   	char bufr[BUFSZ];
11.   	register char *ep, q;
12.   
13.   	pline("Specify what? ");
14.   	getlin(bufr);
15.   	str = bufr;
16.   	while(*str == ' ') str++;
17.   	q = *str;
18.   	if(*(str+1)) pline("One character please.");
19.   	else if(!(fp = fopen("data","r"))) pline("Cannot open data file!");
20.   	else {
21.   		while(fgets(bufr,BUFSZ,fp))
22.   			if(*bufr == q) {
23.   				ep = index(bufr, '\n');
24.   				if(ep) *ep = 0;
25.   				else impossible();
26.   				pline(bufr);
27.   				if(ep[-1] == ';') morewhat(fp);
28.   				goto fnd;
29.   			}
30.   		pline("Unknown symbol.");
31.   	fnd:
32.   		(void) fclose(fp);
33.   	}
34.   }
35.   
36.   morewhat(fp) FILE *fp; {
37.   char bufr[BUFSZ];
38.   register char *ep;
39.   	pline("More info? ");
40.   	if(readchar() != 'y') return;
41.   	cls();
42.   	while(fgets(bufr,BUFSZ,fp) && *bufr == '\t'){
43.   		ep = index(bufr, '\n');
44.   		if(!ep) break;
45.   		*ep = 0;
46.   		puts(bufr+1);
47.   	}
48.   	more();
49.   	docrt();
50.   }