[qemu.git] / cmd.c

/*
 * Copyright (c) 2003-2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it would be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>

#include "cmd.h"

#define _(x)	x	/* not gettext support yet */

extern int optind;

/* from libxcmd/command.c */

cmdinfo_t	*cmdtab;
int		ncmds;

static argsfunc_t	args_func;
static checkfunc_t	check_func;
static int		ncmdline;
static char		**cmdline;

static int
compare(const void *a, const void *b)
{
	return strcmp(((const cmdinfo_t *)a)->name,
		      ((const cmdinfo_t *)b)->name);
}

void
add_command(
	const cmdinfo_t	*ci)
{
	cmdtab = realloc((void *)cmdtab, ++ncmds * sizeof(*cmdtab));
	cmdtab[ncmds - 1] = *ci;
	qsort(cmdtab, ncmds, sizeof(*cmdtab), compare);
}

static int
check_command(
	const cmdinfo_t	*ci)
{
	if (check_func)
		return check_func(ci);
	return 1;
}

void
add_check_command(
	checkfunc_t	cf)
{
	check_func = cf;
}

int
command_usage(
	const cmdinfo_t *ci)
{
	printf("%s %s -- %s\n", ci->name, ci->args, ci->oneline);
	return 0;
}

int
command(
	const cmdinfo_t	*ct,
	int		argc,
	char		**argv)
{
	char		*cmd = argv[0];

	if (!check_command(ct))
		return 0;

	if (argc-1 < ct->argmin || (ct->argmax != -1 && argc-1 > ct->argmax)) {
		if (ct->argmax == -1)
			fprintf(stderr,
	_("bad argument count %d to %s, expected at least %d arguments\n"),
				argc-1, cmd, ct->argmin);
		else if (ct->argmin == ct->argmax)
			fprintf(stderr,
	_("bad argument count %d to %s, expected %d arguments\n"),
				argc-1, cmd, ct->argmin);
		else
			fprintf(stderr,
	_("bad argument count %d to %s, expected between %d and %d arguments\n"),
			argc-1, cmd, ct->argmin, ct->argmax);
		return 0;
	}
	optind = 0;
	return ct->cfunc(argc, argv);
}

const cmdinfo_t *
find_command(
	const char	*cmd)
{
	cmdinfo_t	*ct;

	for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++) {
		if (strcmp(ct->name, cmd) == 0 ||
		    (ct->altname && strcmp(ct->altname, cmd) == 0))
			return (const cmdinfo_t *)ct;
	}
	return NULL;
}

void
add_user_command(char *optarg)
{
	ncmdline++;
	cmdline = realloc(cmdline, sizeof(char*) * (ncmdline));
	if (!cmdline) {
		perror("realloc");
		exit(1);
	}
	cmdline[ncmdline-1] = optarg;
}

static int
args_command(
	int	index)
{
	if (args_func)
		return args_func(index);
	return 0;
}

void
add_args_command(
	argsfunc_t	af)
{
	args_func = af;
}

void
command_loop(void)
{
	int		c, i, j = 0, done = 0;
	char		*input;
	char		**v;
	const cmdinfo_t	*ct;

	for (i = 0; !done && i < ncmdline; i++) {
		input = strdup(cmdline[i]);
		if (!input) {
			fprintf(stderr,
				_("cannot strdup command '%s': %s\n"),
				cmdline[i], strerror(errno));
			exit(1);
		}
		v = breakline(input, &c);
		if (c) {
			ct = find_command(v[0]);
			if (ct) {
				if (ct->flags & CMD_FLAG_GLOBAL)
					done = command(ct, c, v);
				else {
					j = 0;
					while (!done && (j = args_command(j)))
						done = command(ct, c, v);
				}
			} else
				fprintf(stderr, _("command \"%s\" not found\n"),
					v[0]);
		}
		doneline(input, v);
	}
	if (cmdline) {
		free(cmdline);
		return;
	}
	while (!done) {
		if ((input = fetchline()) == NULL)
			break;
		v = breakline(input, &c);
		if (c) {
			ct = find_command(v[0]);
			if (ct)
				done = command(ct, c, v);
			else
				fprintf(stderr, _("command \"%s\" not found\n"),
					v[0]);
		}
		doneline(input, v);
	}
}

/* from libxcmd/input.c */

#if defined(ENABLE_READLINE)
# include <readline/history.h>
# include <readline/readline.h>
#elif defined(ENABLE_EDITLINE)
# include <histedit.h>
#endif

static char *
get_prompt(void)
{
	static char	prompt[FILENAME_MAX + 2 /*"> "*/ + 1 /*"\0"*/ ];

	if (!prompt[0])
		snprintf(prompt, sizeof(prompt), "%s> ", progname);
	return prompt;
}

#if defined(ENABLE_READLINE)
char *
fetchline(void)
{
	char	*line;

	line = readline(get_prompt());
	if (line && *line)
		add_history(line);
	return line;
}
#elif defined(ENABLE_EDITLINE)
static char *el_get_prompt(EditLine *e) { return get_prompt(); }
char *
fetchline(void)
{
	static EditLine	*el;
	static History	*hist;
	HistEvent	hevent;
	char		*line;
	int		count;

	if (!el) {
		hist = history_init();
		history(hist, &hevent, H_SETSIZE, 100);
		el = el_init(progname, stdin, stdout, stderr);
		el_source(el, NULL);
		el_set(el, EL_SIGNAL, 1);
		el_set(el, EL_PROMPT, el_get_prompt);
		el_set(el, EL_HIST, history, (const char *)hist);
	}
	line = strdup(el_gets(el, &count));
	if (line) {
		if (count > 0)
			line[count-1] = '\0';
		if (*line)
			history(hist, &hevent, H_ENTER, line);
	}
	return line;
}
#else
# define MAXREADLINESZ	1024
char *
fetchline(void)
{
	char	*p, *line = malloc(MAXREADLINESZ);

	if (!line)
		return NULL;
	printf("%s", get_prompt());
	fflush(stdout);
	if (!fgets(line, MAXREADLINESZ, stdin)) {
		free(line);
		return NULL;
	}
	p = line + strlen(line);
	if (p != line && p[-1] == '\n')
		p[-1] = '\0';
	return line;
}
#endif

char **
breakline(
	char	*input,
	int	*count)
{
	int	c = 0;
	char	*p;
	char	**rval = calloc(sizeof(char *), 1);

	while (rval && (p = strsep(&input, " ")) != NULL) {
		if (!*p)
			continue;
		c++;
		rval = realloc(rval, sizeof(*rval) * (c + 1));
		if (!rval) {
			c = 0;
			break;
		}
		rval[c - 1] = p;
		rval[c] = NULL;
	}
	*count = c;
	return rval;
}

void
doneline(
	char	*input,
	char	**vec)
{
	free(input);
	free(vec);
}

#define EXABYTES(x)	((long long)(x) << 60)
#define PETABYTES(x)	((long long)(x) << 50)
#define TERABYTES(x)	((long long)(x) << 40)
#define GIGABYTES(x)	((long long)(x) << 30)
#define MEGABYTES(x)	((long long)(x) << 20)
#define KILOBYTES(x)	((long long)(x) << 10)

long long
cvtnum(
	char		*s)
{
	long long	i;
	char		*sp;
	int		c;

	i = strtoll(s, &sp, 0);
	if (i == 0 && sp == s)
		return -1LL;
	if (*sp == '\0')
		return i;

	if (sp[1] != '\0')
		return -1LL;

	c = tolower(*sp);
	switch (c) {
	default:
		return i;
	case 'k':
		return KILOBYTES(i);
	case 'm':
		return MEGABYTES(i);
	case 'g':
		return GIGABYTES(i);
	case 't':
		return TERABYTES(i);
	case 'p':
		return PETABYTES(i);
	case 'e':
		return  EXABYTES(i);
	}
	return -1LL;
}

#define TO_EXABYTES(x)	((x) / EXABYTES(1))
#define TO_PETABYTES(x)	((x) / PETABYTES(1))
#define TO_TERABYTES(x)	((x) / TERABYTES(1))
#define TO_GIGABYTES(x)	((x) / GIGABYTES(1))
#define TO_MEGABYTES(x)	((x) / MEGABYTES(1))
#define TO_KILOBYTES(x)	((x) / KILOBYTES(1))

void
cvtstr(
	double		value,
	char		*str,
	size_t		size)
{
	const char	*fmt;
	int		precise;

	precise = ((double)value * 1000 == (double)(int)value * 1000);

	if (value >= EXABYTES(1)) {
		fmt = precise ? "%.f EiB" : "%.3f EiB";
		snprintf(str, size, fmt, TO_EXABYTES(value));
	} else if (value >= PETABYTES(1)) {
		fmt = precise ? "%.f PiB" : "%.3f PiB";
		snprintf(str, size, fmt, TO_PETABYTES(value));
	} else if (value >= TERABYTES(1)) {
		fmt = precise ? "%.f TiB" : "%.3f TiB";
		snprintf(str, size, fmt, TO_TERABYTES(value));
	} else if (value >= GIGABYTES(1)) {
		fmt = precise ? "%.f GiB" : "%.3f GiB";
		snprintf(str, size, fmt, TO_GIGABYTES(value));
	} else if (value >= MEGABYTES(1)) {
		fmt = precise ? "%.f MiB" : "%.3f MiB";
		snprintf(str, size, fmt, TO_MEGABYTES(value));
	} else if (value >= KILOBYTES(1)) {
		fmt = precise ? "%.f KiB" : "%.3f KiB";
		snprintf(str, size, fmt, TO_KILOBYTES(value));
	} else {
		snprintf(str, size, "%f bytes", value);
	}
}

struct timeval
tsub(struct timeval t1, struct timeval t2)
{
	t1.tv_usec -= t2.tv_usec;
	if (t1.tv_usec < 0) {
		t1.tv_usec += 1000000;
		t1.tv_sec--;
	}
	t1.tv_sec -= t2.tv_sec;
	return t1;
}

double
tdiv(double value, struct timeval tv)
{
	return value / ((double)tv.tv_sec + ((double)tv.tv_usec / 1000000.0));
}

#define HOURS(sec)	((sec) / (60 * 60))
#define MINUTES(sec)	(((sec) % (60 * 60)) / 60)
#define SECONDS(sec)	((sec) % 60)

void
timestr(
	struct timeval	*tv,
	char		*ts,
	size_t		size,
	int		format)
{
	double		usec = (double)tv->tv_usec / 1000000.0;

	if (format & TERSE_FIXED_TIME) {
		if (!HOURS(tv->tv_sec)) {
			snprintf(ts, size, "%u:%02u.%02u",
				(unsigned int) MINUTES(tv->tv_sec),
				(unsigned int) SECONDS(tv->tv_sec),
				(unsigned int) usec * 100);
			return;
		}
		format |= VERBOSE_FIXED_TIME;	/* fallback if hours needed */
	}

	if ((format & VERBOSE_FIXED_TIME) || tv->tv_sec) {
		snprintf(ts, size, "%u:%02u:%02u.%02u",
			(unsigned int) HOURS(tv->tv_sec),
			(unsigned int) MINUTES(tv->tv_sec),
			(unsigned int) SECONDS(tv->tv_sec),
			(unsigned int) usec * 100);
	} else {
		snprintf(ts, size, "0.%04u sec", (unsigned int) usec * 10000);
	}
}


/* from libxcmd/quit.c */

static cmdinfo_t quit_cmd;

/* ARGSUSED */
static int
quit_f(
	int	argc,
	char	**argv)
{
	return 1;
}

void
quit_init(void)
{
	quit_cmd.name = _("quit");
	quit_cmd.altname = _("q");
	quit_cmd.cfunc = quit_f;
	quit_cmd.argmin = -1;
	quit_cmd.argmax = -1;
	quit_cmd.flags = CMD_FLAG_GLOBAL;
	quit_cmd.oneline = _("exit the program");

	add_command(&quit_cmd);
}

/* from libxcmd/help.c */

static cmdinfo_t help_cmd;
static void help_onecmd(const char *cmd, const cmdinfo_t *ct);
static void help_oneline(const char *cmd, const cmdinfo_t *ct);

static void
help_all(void)
{
	const cmdinfo_t	*ct;

	for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++)
		help_oneline(ct->name, ct);
	printf(_("\nUse 'help commandname' for extended help.\n"));
}

static int
help_f(
	int		argc,
	char		**argv)
{
	const cmdinfo_t	*ct;

	if (argc == 1) {
		help_all();
		return 0;
	}
	ct = find_command(argv[1]);
	if (ct == NULL) {
		printf(_("command %s not found\n"), argv[1]);
		return 0;
	}
	help_onecmd(argv[1], ct);
	return 0;
}

static void
help_onecmd(
	const char	*cmd,
	const cmdinfo_t	*ct)
{
	help_oneline(cmd, ct);
	if (ct->help)
		ct->help();
}

static void
help_oneline(
	const char	*cmd,
	const cmdinfo_t	*ct)
{
	if (cmd)
		printf("%s ", cmd);
	else {
		printf("%s ", ct->name);
		if (ct->altname)
			printf("(or %s) ", ct->altname);
	}
	if (ct->args)
		printf("%s ", ct->args);
	printf("-- %s\n", ct->oneline);
}

void
help_init(void)
{
	help_cmd.name = _("help");
	help_cmd.altname = _("?");
	help_cmd.cfunc = help_f;
	help_cmd.argmin = 0;
	help_cmd.argmax = 1;
	help_cmd.flags = CMD_FLAG_GLOBAL;
	help_cmd.args = _("[command]");
	help_cmd.oneline = _("help for one or all commands");

	add_command(&help_cmd);
}
Commit	Line	Data
e3aff4f6 AL	1	/*
	2	* Copyright (c) 2003-2005 Silicon Graphics, Inc.
	3	* All Rights Reserved.
	4	*
	5	* This program is free software; you can redistribute it and/or
	6	* modify it under the terms of the GNU General Public License as
	7	* published by the Free Software Foundation.
	8	*
	9	* This program is distributed in the hope that it would be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
	13	*
	14	* You should have received a copy of the GNU General Public License
8167ee88	15	* along with this program; if not, see <http://www.gnu.org/licenses/>.
e3aff4f6 AL	16	*/
	17
	18	#include <stdio.h>
	19	#include <stdlib.h>
	20	#include <string.h>
	21	#include <ctype.h>
	22	#include <errno.h>
	23
	24	#include "cmd.h"
	25
	26	#define _(x) x /* not gettext support yet */
	27
	28	extern int optind;
	29
	30	/* from libxcmd/command.c */
	31
	32	cmdinfo_t *cmdtab;
	33	int ncmds;
	34
	35	static argsfunc_t args_func;
	36	static checkfunc_t check_func;
	37	static int ncmdline;
	38	static char **cmdline;
	39
	40	static int
	41	compare(const void a, const void b)
	42	{
	43	return strcmp(((const cmdinfo_t *)a)->name,
	44	((const cmdinfo_t *)b)->name);
	45	}
	46
	47	void
	48	add_command(
	49	const cmdinfo_t *ci)
	50	{
	51	cmdtab = realloc((void )cmdtab, ++ncmds sizeof(*cmdtab));
	52	cmdtab[ncmds - 1] = *ci;
	53	qsort(cmdtab, ncmds, sizeof(*cmdtab), compare);
	54	}
	55
	56	static int
	57	check_command(
	58	const cmdinfo_t *ci)
	59	{
	60	if (check_func)
	61	return check_func(ci);
	62	return 1;
	63	}
	64
	65	void
	66	add_check_command(
	67	checkfunc_t cf)
	68	{
	69	check_func = cf;
	70	}
	71
	72	int
	73	command_usage(
	74	const cmdinfo_t *ci)
	75	{
	76	printf("%s %s -- %s\n", ci->name, ci->args, ci->oneline);
	77	return 0;
	78	}
	79
80	int
81	command(
82	const cmdinfo_t *ct,
83	int argc,
84	char **argv)
85	{
86	char *cmd = argv[0];
87
88	if (!check_command(ct))
89	return 0;
90
91	if (argc-1 < ct->argmin \|\| (ct->argmax != -1 && argc-1 > ct->argmax)) {
92	if (ct->argmax == -1)
93	fprintf(stderr,
94	_("bad argument count %d to %s, expected at least %d arguments\n"),
95	argc-1, cmd, ct->argmin);
96	else if (ct->argmin == ct->argmax)
97	fprintf(stderr,
98	_("bad argument count %d to %s, expected %d arguments\n"),
99	argc-1, cmd, ct->argmin);
100	else
101	fprintf(stderr,
102	_("bad argument count %d to %s, expected between %d and %d arguments\n"),
103	argc-1, cmd, ct->argmin, ct->argmax);
104	return 0;
105	}
106	optind = 0;
107	return ct->cfunc(argc, argv);
108	}
109
110	const cmdinfo_t *
111	find_command(
112	const char *cmd)
113	{
114	cmdinfo_t *ct;
115
116	for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++) {
117	if (strcmp(ct->name, cmd) == 0 \|\|
118	(ct->altname && strcmp(ct->altname, cmd) == 0))
119	return (const cmdinfo_t *)ct;
120	}
121	return NULL;
122	}
123
124	void
125	add_user_command(char *optarg)
126	{
127	ncmdline++;
128	cmdline = realloc(cmdline, sizeof(char) (ncmdline));
129	if (!cmdline) {
130	perror("realloc");
131	exit(1);
132	}
133	cmdline[ncmdline-1] = optarg;
134	}
135
136	static int
137	args_command(
138	int index)
139	{
140	if (args_func)
141	return args_func(index);
142	return 0;
143	}
144
145	void
146	add_args_command(
147	argsfunc_t af)
148	{
149	args_func = af;
150	}
151
152	void
153	command_loop(void)
154	{
155	int c, i, j = 0, done = 0;
156	char *input;
157	char **v;
158	const cmdinfo_t *ct;
159
160	for (i = 0; !done && i < ncmdline; i++) {
161	input = strdup(cmdline[i]);
162	if (!input) {
163	fprintf(stderr,
164	_("cannot strdup command '%s': %s\n"),
165	cmdline[i], strerror(errno));
166	exit(1);
167	}
168	v = breakline(input, &c);
169	if (c) {
170	ct = find_command(v[0]);
171	if (ct) {
172	if (ct->flags & CMD_FLAG_GLOBAL)
173	done = command(ct, c, v);
174	else {
175	j = 0;
176	while (!done && (j = args_command(j)))
177	done = command(ct, c, v);
178	}
179	} else
180	fprintf(stderr, _("command \"%s\" not found\n"),
181	v[0]);
182	}
183	doneline(input, v);
184	}
185	if (cmdline) {
186	free(cmdline);
187	return;
188	}
189	while (!done) {
190	if ((input = fetchline()) == NULL)
191	break;
192	v = breakline(input, &c);
193	if (c) {
194	ct = find_command(v[0]);
195	if (ct)
196	done = command(ct, c, v);
197	else
198	fprintf(stderr, _("command \"%s\" not found\n"),
199	v[0]);
200	}
201	doneline(input, v);
202	}
203	}
204
205	/* from libxcmd/input.c */
206
207	#if defined(ENABLE_READLINE)
208	# include <readline/history.h>
209	# include <readline/readline.h>
210	#elif defined(ENABLE_EDITLINE)
211	# include <histedit.h>
212	#endif
213
e3aff4f6 AL	214	static char *
	215	get_prompt(void)
	216	{
	217	static char prompt[FILENAME_MAX + 2 /"> "/ + 1 /"\0"/ ];
	218
	219	if (!prompt[0])
	220	snprintf(prompt, sizeof(prompt), "%s> ", progname);
	221	return prompt;
	222	}
	223
	224	#if defined(ENABLE_READLINE)
	225	char *
	226	fetchline(void)
	227	{
	228	char *line;
	229
	230	line = readline(get_prompt());
	231	if (line && *line)
	232	add_history(line);
	233	return line;
	234	}
	235	#elif defined(ENABLE_EDITLINE)
	236	static char el_get_prompt(EditLine e) { return get_prompt(); }
	237	char *
	238	fetchline(void)
	239	{
	240	static EditLine *el;
	241	static History *hist;
	242	HistEvent hevent;
	243	char *line;
	244	int count;
	245
	246	if (!el) {
	247	hist = history_init();
	248	history(hist, &hevent, H_SETSIZE, 100);
	249	el = el_init(progname, stdin, stdout, stderr);
	250	el_source(el, NULL);
	251	el_set(el, EL_SIGNAL, 1);
	252	el_set(el, EL_PROMPT, el_get_prompt);
	253	el_set(el, EL_HIST, history, (const char *)hist);
	254	}
	255	line = strdup(el_gets(el, &count));
	256	if (line) {
	257	if (count > 0)
	258	line[count-1] = '\0';
	259	if (*line)
	260	history(hist, &hevent, H_ENTER, line);
	261	}
	262	return line;
	263	}
	264	#else
	265	# define MAXREADLINESZ 1024
	266	char *
	267	fetchline(void)
	268	{
	269	char p, line = malloc(MAXREADLINESZ);
	270
	271	if (!line)
	272	return NULL;
	273	printf("%s", get_prompt());
	274	fflush(stdout);
	275	if (!fgets(line, MAXREADLINESZ, stdin)) {
	276	free(line);
	277	return NULL;
278	}
279	p = line + strlen(line);
280	if (p != line && p[-1] == '\n')
281	p[-1] = '\0';
282	return line;
283	}
284	#endif
285
286	char **
287	breakline(
288	char *input,
289	int *count)
290	{
291	int c = 0;
292	char *p;
293	char *rval = calloc(sizeof(char ), 1);
294
295	while (rval && (p = strsep(&input, " ")) != NULL) {
296	if (!*p)
297	continue;
298	c++;
299	rval = realloc(rval, sizeof(rval) (c + 1));
300	if (!rval) {
301	c = 0;
302	break;
303	}
304	rval[c - 1] = p;
305	rval[c] = NULL;
306	}
307	*count = c;
308	return rval;
309	}
310
311	void
312	doneline(
313	char *input,
314	char **vec)
315	{
316	free(input);
317	free(vec);
318	}
319
320	#define EXABYTES(x) ((long long)(x) << 60)
321	#define PETABYTES(x) ((long long)(x) << 50)
322	#define TERABYTES(x) ((long long)(x) << 40)
323	#define GIGABYTES(x) ((long long)(x) << 30)
324	#define MEGABYTES(x) ((long long)(x) << 20)
325	#define KILOBYTES(x) ((long long)(x) << 10)
326
327	long long
328	cvtnum(
329	char *s)
330	{
331	long long i;
332	char *sp;
333	int c;
334
335	i = strtoll(s, &sp, 0);
336	if (i == 0 && sp == s)
337	return -1LL;
338	if (*sp == '\0')
339	return i;
340
341	if (sp[1] != '\0')
342	return -1LL;
343
344	c = tolower(*sp);
345	switch (c) {
346	default:
347	return i;
348	case 'k':
349	return KILOBYTES(i);
350	case 'm':
351	return MEGABYTES(i);
352	case 'g':
353	return GIGABYTES(i);
354	case 't':
355	return TERABYTES(i);
356	case 'p':
357	return PETABYTES(i);
358	case 'e':
359	return EXABYTES(i);
360	}
361	return -1LL;
362	}
363
364	#define TO_EXABYTES(x) ((x) / EXABYTES(1))
365	#define TO_PETABYTES(x) ((x) / PETABYTES(1))
366	#define TO_TERABYTES(x) ((x) / TERABYTES(1))
367	#define TO_GIGABYTES(x) ((x) / GIGABYTES(1))
368	#define TO_MEGABYTES(x) ((x) / MEGABYTES(1))
369	#define TO_KILOBYTES(x) ((x) / KILOBYTES(1))
370
371	void
372	cvtstr(
373	double value,
374	char *str,
375	size_t size)
376	{
377	const char *fmt;
378	int precise;
379
380	precise = ((double)value * 1000 == (double)(int)value * 1000);
381
382	if (value >= EXABYTES(1)) {
383	fmt = precise ? "%.f EiB" : "%.3f EiB";
384	snprintf(str, size, fmt, TO_EXABYTES(value));
385	} else if (value >= PETABYTES(1)) {
386	fmt = precise ? "%.f PiB" : "%.3f PiB";
387	snprintf(str, size, fmt, TO_PETABYTES(value));
388	} else if (value >= TERABYTES(1)) {
389	fmt = precise ? "%.f TiB" : "%.3f TiB";
390	snprintf(str, size, fmt, TO_TERABYTES(value));
391	} else if (value >= GIGABYTES(1)) {
392	fmt = precise ? "%.f GiB" : "%.3f GiB";
393	snprintf(str, size, fmt, TO_GIGABYTES(value));
394	} else if (value >= MEGABYTES(1)) {
395	fmt = precise ? "%.f MiB" : "%.3f MiB";
396	snprintf(str, size, fmt, TO_MEGABYTES(value));
397	} else if (value >= KILOBYTES(1)) {
398	fmt = precise ? "%.f KiB" : "%.3f KiB";
399	snprintf(str, size, fmt, TO_KILOBYTES(value));
400	} else {
401	snprintf(str, size, "%f bytes", value);
402	}
403	}
404
405	struct timeval
406	tsub(struct timeval t1, struct timeval t2)
407	{
408	t1.tv_usec -= t2.tv_usec;
409	if (t1.tv_usec < 0) {
410	t1.tv_usec += 1000000;
411	t1.tv_sec--;
412	}
413	t1.tv_sec -= t2.tv_sec;
414	return t1;
415	}
416
417	double
418	tdiv(double value, struct timeval tv)
419	{
420	return value / ((double)tv.tv_sec + ((double)tv.tv_usec / 1000000.0));
421	}
422
423	#define HOURS(sec) ((sec) / (60 * 60))
424	#define MINUTES(sec) (((sec) % (60 * 60)) / 60)
425	#define SECONDS(sec) ((sec) % 60)
426
427	void
428	timestr(
429	struct timeval *tv,
430	char *ts,
431	size_t size,
432	int format)
433	{
434	double usec = (double)tv->tv_usec / 1000000.0;
435
436	if (format & TERSE_FIXED_TIME) {
437	if (!HOURS(tv->tv_sec)) {
438	snprintf(ts, size, "%u:%02u.%02u",
439	(unsigned int) MINUTES(tv->tv_sec),
440	(unsigned int) SECONDS(tv->tv_sec),
441	(unsigned int) usec * 100);
442	return;
443	}
444	format \|= VERBOSE_FIXED_TIME; /* fallback if hours needed */
445	}
446
447	if ((format & VERBOSE_FIXED_TIME) \|\| tv->tv_sec) {
448	snprintf(ts, size, "%u:%02u:%02u.%02u",
449	(unsigned int) HOURS(tv->tv_sec),
450	(unsigned int) MINUTES(tv->tv_sec),
451	(unsigned int) SECONDS(tv->tv_sec),
452	(unsigned int) usec * 100);
453	} else {
454	snprintf(ts, size, "0.%04u sec", (unsigned int) usec * 10000);
455	}
456	}
457
458
459	/* from libxcmd/quit.c */
460
461	static cmdinfo_t quit_cmd;
462
463	/* ARGSUSED */
464	static int
465	quit_f(
466	int argc,
467	char **argv)
468	{
469	return 1;
470	}
471
472	void
473	quit_init(void)
474	{
475	quit_cmd.name = _("quit");
476	quit_cmd.altname = _("q");
477	quit_cmd.cfunc = quit_f;
478	quit_cmd.argmin = -1;
479	quit_cmd.argmax = -1;
480	quit_cmd.flags = CMD_FLAG_GLOBAL;
481	quit_cmd.oneline = _("exit the program");
482
483	add_command(&quit_cmd);
484	}
485
486	/* from libxcmd/help.c */
487
488	static cmdinfo_t help_cmd;
489	static void help_onecmd(const char cmd, const cmdinfo_t ct);
490	static void help_oneline(const char cmd, const cmdinfo_t ct);
491
492	static void
493	help_all(void)
494	{
495	const cmdinfo_t *ct;
496
497	for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++)
498	help_oneline(ct->name, ct);
499	printf(_("\nUse 'help commandname' for extended help.\n"));
500	}
501
502	static int
503	help_f(
504	int argc,
505	char **argv)
506	{
507	const cmdinfo_t *ct;
508
509	if (argc == 1) {
510	help_all();
511	return 0;
512	}
513	ct = find_command(argv[1]);
514	if (ct == NULL) {
515	printf(_("command %s not found\n"), argv[1]);
516	return 0;
517	}
518	help_onecmd(argv[1], ct);
519	return 0;
520	}
521
522	static void
523	help_onecmd(
524	const char *cmd,
525	const cmdinfo_t *ct)
526	{
527	help_oneline(cmd, ct);
528	if (ct->help)
529	ct->help();
530	}
531
532	static void
533	help_oneline(
534	const char *cmd,
535	const cmdinfo_t *ct)
536	{
537	if (cmd)
538	printf("%s ", cmd);
539	else {
540	printf("%s ", ct->name);
541	if (ct->altname)
542	printf("(or %s) ", ct->altname);
543	}
544	if (ct->args)
545	printf("%s ", ct->args);
546	printf("-- %s\n", ct->oneline);
547	}
548
549	void
550	help_init(void)
551	{
552	help_cmd.name = _("help");
553	help_cmd.altname = _("?");
554	help_cmd.cfunc = help_f;
555	help_cmd.argmin = 0;
556	help_cmd.argmax = 1;
557	help_cmd.flags = CMD_FLAG_GLOBAL;
558	help_cmd.args = _("[command]");
559	help_cmd.oneline = _("help for one or all commands");
560
561	add_command(&help_cmd);
562	}