# include "stdio.h"
hash (s)
	char *s;
{
int c, n;
for(n=0; c= *s; s++)
	n += (c*n+ c << (n%4));
return(n>0 ? n : -n);
}
err (s, a)
	char *s;
{
fprintf(stderr, "Error: ");
fprintf(stderr, s, a);
putc('\n', stderr);
exit(1);
}
prefix(t, s)
	char *t, *s;
{
int c, d;
while ( (c= *t++) == *s++)
	if (c==0) return(1);
return(c==0 ? 1: 0);
}
mindex(s, c)
	char *s;
{
register char *p;
for( p=s; *p; p++)
	if (*p ==c)
		return(p);
return(0);
}
zalloc(m,n)
{
	int t;
# if D1
fprintf(stderr, "calling calloc for %d*%d bytes\n",m,n);
# endif
t = calloc(m,n);
# if D1
fprintf(stderr, "calloc returned %o\n", t);
# endif
return(t);
}