/*  * 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 <draw.h>#include <html.h>#include "dat.h" void*emalloc(ulong n){	void *p; 	p = malloc(n);	if(p == nil)		error("can't malloc: %r");	memset(p, 0, n);	return p;} void*erealloc(void *p, ulong n){	p = realloc(p, n);	if(p == nil)		error("can't malloc: %r");	return p;} char*estrdup(char *s){	char *t; 	t = emalloc(strlen(s)+1);	strcpy(t, s);	return t;} char*estrstrdup(char *s, char *t){	long ns, nt;	char *u; 	ns = strlen(s);	nt = strlen(t);	/* use malloc to avoid memset */	u = malloc(ns+nt+1);	if(u == nil)		error("can't malloc: %r");	memmove(u, s, ns);	memmove(u+ns, t, nt);	u[ns+nt] = '\0';	return u;} char*eappend(char *s, char *sep, char *t){	long ns, nsep, nt;	char *u; 	if(t == nil)		u = estrstrdup(s, sep);	else{		ns = strlen(s);		nsep = strlen(sep);		nt = strlen(t);		/* use malloc to avoid memset */		u = malloc(ns+nsep+nt+1);		if(u == nil)			error("can't malloc: %r");		memmove(u, s, ns);		memmove(u+ns, sep, nsep);		memmove(u+ns+nsep, t, nt);		u[ns+nsep+nt] = '\0';	}	free(s);	return u;} char*egrow(char *s, char *sep, char *t){	s = eappend(s, sep, t);	free(t);	return s;} voiderror(char *fmt, ...){	va_list arg;	char buf[256];	Fmt f; 	fmtfdinit(&f, 2, buf, sizeof buf);	fmtprint(&f, "Mail: ");	va_start(arg, fmt);	fmtvprint(&f, fmt, arg);	va_end(arg);	fmtprint(&f, "\n");	fmtfdflush(&f);	exits(fmt);} voidgrowbytes(Bytes *b, char *s, long ns){	if(b->nalloc < b->n + ns + 1){		b->nalloc = b->n + ns + 8000;		/* use realloc to avoid memset */		b->b = realloc(b->b, b->nalloc);		if(b->b == nil)			error("growbytes: can't realloc: %r");	}	memmove(b->b+b->n, s, ns);	b->n += ns;	b->b[b->n] = '\0';}