#include <u.h>#include <libc.h> static char *nextmem = 0;static long sizemem = 0; #define	HUNK	16384#define	STRSIZE	4096 voidstaticgetmem(void){	char *h; 	h = (char *) sbrk(HUNK);	if(h == (char *)-1){		fprint(2, "getmem didn't\n");		abort();	}	if(nextmem == 0)		nextmem = h;	sizemem += HUNK;} char *lmalloc(long n){	char *addr; 	n = (n+3)&~3;	while(sizemem < n)		getmem();	addr = nextmem;	nextmem += n;	sizemem -= n;	return(addr); } char *f_strdup(char *s){	char *ss, *sss;	long n; 	if(sizemem < STRSIZE)		getmem();	n = (char *) memchr(s, 0, STRSIZE)-s+1;	memcpy(nextmem, s, (int)n);	s = nextmem;	n = (n+3)&~3;	nextmem += n;	sizemem -= n;	if(sizemem < 0){		fprint(2, "strdup screwed up %ld\n", n);		abort();	}	return(s);} voidFree(char *s){} char *Realloc(char *ptr, long n){	char *ss; 	ss = lmalloc((long)n);	if(ss)		memcpy(ss, ptr, n);	/* this shouldn't screw up (ptr may not be n) */	return(ss);}