/*  * 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 "stdinc.h" #include "9.h" typedef struct {	char*	argv0;	int	(*cmd)(int, char*[]);} Cmd; static struct {	VtLock*	lock;	Cmd*	cmd;	int	ncmd;	int	hi;} cbox; enum {	NCmdIncr	= 20,}; intcliError(char* fmt, ...){	char *p;	va_list arg; 	va_start(arg, fmt);	p = vsmprint(fmt, arg);	vtSetError("%s", p);	free(p);	va_end(arg); 	return 0;} intcliExec(char* buf){	int argc, i, r;	char *argv[20], *p; 	p = vtStrDup(buf);	if((argc = tokenize(p, argv, nelem(argv)-1)) == 0){		vtMemFree(p);		return 1;	}	argv[argc] = 0; 	if(argv[0][0] == '#'){		vtMemFree(p);		return 1;	} 	vtLock(cbox.lock);	for(i = 0; i < cbox.hi; i++){		if(strcmp(cbox.cmd[i].argv0, argv[0]) == 0){			vtUnlock(cbox.lock);			if(!(r = cbox.cmd[i].cmd(argc, argv)))				consPrint("%s\n", vtGetError());			vtMemFree(p);			return r;		}	}	vtUnlock(cbox.lock); 	consPrint("%s: - eh?\n", argv[0]);	vtMemFree(p); 	return 0;} intcliAddCmd(char* argv0, int (*cmd)(int, char*[])){	int i;	Cmd *opt; 	vtLock(cbox.lock);	for(i = 0; i < cbox.hi; i++){		if(strcmp(argv0, cbox.cmd[i].argv0) == 0){			vtUnlock(cbox.lock);			return 0;		}	}	if(i >= cbox.hi){		if(cbox.hi >= cbox.ncmd){			cbox.cmd = vtMemRealloc(cbox.cmd,					(cbox.ncmd+NCmdIncr)*sizeof(Cmd));			memset(&cbox.cmd[cbox.ncmd], 0, NCmdIncr*sizeof(Cmd));			cbox.ncmd += NCmdIncr;		}	} 	opt = &cbox.cmd[cbox.hi];	opt->argv0 = argv0;	opt->cmd = cmd;	cbox.hi++;	vtUnlock(cbox.lock); 	return 1;} intcliInit(void){	cbox.lock = vtLockAlloc();	cbox.cmd = vtMemAllocZ(NCmdIncr*sizeof(Cmd));	cbox.ncmd = NCmdIncr;	cbox.hi = 0; 	return 1;}