/*  * This file is part of the UCB release of Plan 9. It is subject to the license * terms in the LICENSE file found in the top-level directory of this * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No * part of the UCB release of Plan 9, including this file, may be copied, * modified, propagated, or distributed except according to the terms contained * in the LICENSE file. */ #include <u.h>#include <libc.h>#include <bio.h>#include <libsec.h>#include <ctype.h> #include "iso9660.h" typedef struct Stringtab	Stringtab;struct Stringtab {	Stringtab *link;	char *str;}; static Stringtab *stab[1024]; static uinthash(char *s){	uint h;	uchar *p; 	h = 0;	for(p=(uchar*)s; *p; p++)		h = h*37 + *p;	return h;} static char*estrdup(char *s){	if((s = strdup(s)) == nil)		sysfatal("strdup(%.10s): out of memory", s);	return s;} char*atom(char *str){	uint h;	Stringtab *tab;		h = hash(str) % nelem(stab);	for(tab=stab[h]; tab; tab=tab->link)		if(strcmp(str, tab->str) == 0)			return tab->str; 	tab = emalloc(sizeof *tab);	tab->str = estrdup(str);	tab->link = stab[h];	stab[h] = tab;	return tab->str;} void*emalloc(ulong n){	void *p; 	if((p = malloc(n)) == nil)		sysfatal("malloc(%lud): out of memory", n);	memset(p, 0, n);	return p;} void*erealloc(void *v, ulong n){	if((v = realloc(v, n)) == nil)		sysfatal("realloc(%p, %lud): out of memory", v, n);	return v;} char*struprcpy(char *p, char *s){	char *op; 	op = p;	for(; *s; s++)		*p++ = toupper(*s);	*p = '\0'; 	return op;} intchat(char *fmt, ...){	va_list arg; 	if(!chatty)		return 0;	va_start(arg, fmt);	vfprint(2, fmt, arg);	va_end(arg);	return 1;}