[u-boot.git] / common / command.c

/*
 * (C) Copyright 2000-2003
 * Wolfgang Denk, DENX Software Engineering, [email protected].
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * 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; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

/*
 *  Command Processor Table
 */

#include <common.h>
#include <command.h>

int
do_version (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
	extern char version_string[];
	printf ("\n%s\n", version_string);
	return 0;
}

U_BOOT_CMD(
	version,	1,		1,	do_version,
 	"version - print monitor version\n",
	NULL
);

int
do_echo (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
	int i, putnl = 1;

	for (i = 1; i < argc; i++) {
		char *p = argv[i], c;

		if (i > 1)
			putc(' ');
		while ((c = *p++) != '\0') {
			if (c == '\\' && *p == 'c') {
				putnl = 0;
				p++;
			} else {
				putc(c);
			}
		}
	}

	if (putnl)
		putc('\n');
	return 0;
}

U_BOOT_CMD(
	echo,	CFG_MAXARGS,	1,	do_echo,
 	"echo    - echo args to console\n",
 	"[args..]\n"
	"    - echo args to console; \\c suppresses newline\n"
);

/*
 * Use puts() instead of printf() to avoid printf buffer overflow
 * for long help messages
 */
int do_help (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
{
	int i;
	int rcode = 0;

	if (argc == 1) {	/*show list of commands */

		int cmd_items = &__u_boot_cmd_end -
				&__u_boot_cmd_start;	/* pointer arith! */
		cmd_tbl_t *cmd_array[cmd_items];
		int i, j, swaps;

		/* Make array of commands from .uboot_cmd section */
		cmdtp = &__u_boot_cmd_start;
		for (i = 0; i < cmd_items; i++) {
			cmd_array[i] = cmdtp++;
		}

		/* Sort command list (trivial bubble sort) */
		for (i = cmd_items - 1; i > 0; --i) {
			swaps = 0;
			for (j = 0; j < i; ++j) {
				if (strcmp (cmd_array[j]->name,
					    cmd_array[j + 1]->name) > 0) {
					cmd_tbl_t *tmp;
					tmp = cmd_array[j];
					cmd_array[j] = cmd_array[j + 1];
					cmd_array[j + 1] = tmp;
					++swaps;
				}
			}
			if (!swaps)
				break;
		}

		/* print short help (usage) */
		for (i = 0; i < cmd_items; i++) {
			const char *usage = cmd_array[i]->usage;

			/* allow user abort */
			if (ctrlc ())
				return 1;
			if (usage == NULL)
				continue;
			puts (usage);
		}
		return 0;
	}
	/*
	 * command help (long version)
	 */
	for (i = 1; i < argc; ++i) {
		if ((cmdtp = find_cmd (argv[i])) != NULL) {
#ifdef	CFG_LONGHELP
			/* found - print (long) help info */
			puts (cmdtp->name);
			putc (' ');
			if (cmdtp->help) {
				puts (cmdtp->help);
			} else {
				puts ("- No help available.\n");
				rcode = 1;
			}
			putc ('\n');
#else	/* no long help available */
			if (cmdtp->usage)
				puts (cmdtp->usage);
#endif	/* CFG_LONGHELP */
		} else {
			printf ("Unknown command '%s' - try 'help'"
				" without arguments for list of all"
				" known commands\n\n", argv[i]
					);
			rcode = 1;
		}
	}
	return rcode;
}


U_BOOT_CMD(
	help,	CFG_MAXARGS,	1,	do_help,
 	"help    - print online help\n",
 	"[command ...]\n"
 	"    - show help information (for 'command')\n"
 	"'help' prints online help for the monitor commands.\n\n"
 	"Without arguments, it prints a short usage message for all commands.\n\n"
 	"To get detailed help information for specific commands you can type\n"
  "'help' with one or more command names as arguments.\n"
);

/* This do not ust the U_BOOT_CMD macro as ? can't be used in symbol names */
#ifdef  CFG_LONGHELP
cmd_tbl_t __u_boot_cmd_question_mark Struct_Section = {
	"?",	CFG_MAXARGS,	1,	do_help,
 	"?       - alias for 'help'\n",
	NULL
};
#else
cmd_tbl_t __u_boot_cmd_question_mark Struct_Section = {
	"?",	CFG_MAXARGS,	1,	do_help,
 	"?       - alias for 'help'\n"
};
#endif /* CFG_LONGHELP */

/***************************************************************************
 * find command table entry for a command
 */
cmd_tbl_t *find_cmd (const char *cmd)
{
	cmd_tbl_t *cmdtp;
	cmd_tbl_t *cmdtp_temp = &__u_boot_cmd_start;	/*Init value */
	const char *p;
	int len;
	int n_found = 0;

	/*
	 * Some commands allow length modifiers (like "cp.b");
	 * compare command name only until first dot.
	 */
	len = ((p = strchr(cmd, '.')) == NULL) ? strlen (cmd) : (p - cmd);

	for (cmdtp = &__u_boot_cmd_start;
	     cmdtp != &__u_boot_cmd_end;
	     cmdtp++) {
		if (strncmp (cmd, cmdtp->name, len) == 0) {
			if (len == strlen (cmdtp->name))
				return cmdtp;	/* full match */

			cmdtp_temp = cmdtp;	/* abbreviated command ? */
			n_found++;
		}
	}
	if (n_found == 1) {			/* exactly one match */
		return cmdtp_temp;
	}

	return NULL;	/* not found or ambiguous command */
}

#ifdef CONFIG_AUTO_COMPLETE

int var_complete(int argc, char *argv[], char last_char, int maxv, char *cmdv[])
{
	static char tmp_buf[512];
	int space;

	space = last_char == '\0' || last_char == ' ' || last_char == '\t';

	if (space && argc == 1)
		return env_complete("", maxv, cmdv, sizeof(tmp_buf), tmp_buf);

	if (!space && argc == 2)
		return env_complete(argv[1], maxv, cmdv, sizeof(tmp_buf), tmp_buf);

	return 0;
}

static void install_auto_complete_handler(const char *cmd,
		int (*complete)(int argc, char *argv[], char last_char, int maxv, char *cmdv[]))
{
	cmd_tbl_t *cmdtp;

	cmdtp = find_cmd(cmd);
	if (cmdtp == NULL)
		return;

	cmdtp->complete = complete;
}

void install_auto_complete(void)
{
	install_auto_complete_handler("printenv", var_complete);
	install_auto_complete_handler("setenv", var_complete);
#if (CONFIG_COMMANDS & CFG_CMD_RUN)
	install_auto_complete_handler("run", var_complete);
#endif
}

/*************************************************************************************/

static int complete_cmdv(int argc, char *argv[], char last_char, int maxv, char *cmdv[])
{
	cmd_tbl_t *cmdtp;
	const char *p;
	int len, clen;
	int n_found = 0;
	const char *cmd;

	/* sanity? */
	if (maxv < 2)
		return -2;

	cmdv[0] = NULL;

	if (argc == 0) {
		/* output full list of commands */
		for (cmdtp = &__u_boot_cmd_start; cmdtp != &__u_boot_cmd_end; cmdtp++) {
			if (n_found >= maxv - 2) {
				cmdv[n_found++] = "...";
				break;
			}
			cmdv[n_found++] = cmdtp->name;
		}
		cmdv[n_found] = NULL;
		return n_found;
	}

	/* more than one arg or one but the start of the next */
	if (argc > 1 || (last_char == '\0' || last_char == ' ' || last_char == '\t')) {
		cmdtp = find_cmd(argv[0]);
		if (cmdtp == NULL || cmdtp->complete == NULL) {
			cmdv[0] = NULL;
			return 0;
		}
		return (*cmdtp->complete)(argc, argv, last_char, maxv, cmdv);
	}

	cmd = argv[0];
	/*
	 * Some commands allow length modifiers (like "cp.b");
	 * compare command name only until first dot.
	 */
	p = strchr(cmd, '.');
	if (p == NULL)
		len = strlen(cmd);
	else
		len = p - cmd;

	/* return the partial matches */
	for (cmdtp = &__u_boot_cmd_start; cmdtp != &__u_boot_cmd_end; cmdtp++) {

		clen = strlen(cmdtp->name);
		if (clen < len)
			continue;

		if (memcmp(cmd, cmdtp->name, len) != 0)
			continue;

		/* too many! */
		if (n_found >= maxv - 2) {
			cmdv[n_found++] = "...";
			break;
		}

		cmdv[n_found++] = cmdtp->name;
	}

	cmdv[n_found] = NULL;
	return n_found;
}

static int make_argv(char *s, int argvsz, char *argv[])
{
	int argc = 0;

	/* split into argv */
	while (argc < argvsz - 1) {

		/* skip any white space */
		while ((*s == ' ') || (*s == '\t'))
			++s;

		if (*s == '\0') 	/* end of s, no more args	*/
			break;

		argv[argc++] = s;	/* begin of argument string	*/

		/* find end of string */
		while (*s && (*s != ' ') && (*s != '\t'))
			++s;

		if (*s == '\0')		/* end of s, no more args	*/
			break;

		*s++ = '\0';		/* terminate current arg	 */
	}
	argv[argc] = NULL;

	return argc;
}

static void print_argv(const char *banner, const char *leader, const char *sep, int linemax, char *argv[])
{
	int ll = leader != NULL ? strlen(leader) : 0;
	int sl = sep != NULL ? strlen(sep) : 0;
	int len, i;

	if (banner) {
		puts("\n");
		puts(banner);
	}

	i = linemax;	/* force leader and newline */
	while (*argv != NULL) {
		len = strlen(*argv) + sl;
		if (i + len >= linemax) {
			puts("\n");
			if (leader)
				puts(leader);
			i = ll - sl;
		} else if (sep)
			puts(sep);
		puts(*argv++);
		i += len;
	}
	printf("\n");
}

static int find_common_prefix(char *argv[])
{
	int i, len;
	char *anchor, *s, *t;

	if (*argv == NULL)
		return 0;

	/* begin with max */
	anchor = *argv++;
	len = strlen(anchor);
	while ((t = *argv++) != NULL) {
		s = anchor;
		for (i = 0; i < len; i++, t++, s++) {
			if (*t != *s)
				break;
		}
		len = s - anchor;
	}
	return len;
}

static char tmp_buf[CFG_CBSIZE];	/* copy of console I/O buffer	*/

int cmd_auto_complete(const char *const prompt, char *buf, int *np, int *colp)
{
	int n = *np, col = *colp;
	char *argv[CFG_MAXARGS + 1];		/* NULL terminated	*/
	char *cmdv[20];
	char *s, *t;
	const char *sep;
	int i, j, k, len, seplen, argc;
	int cnt;
	char last_char;

	if (strcmp(prompt, CFG_PROMPT) != 0)
		return 0;	/* not in normal console */

	cnt = strlen(buf);
	if (cnt >= 1)
		last_char = buf[cnt - 1];
	else
		last_char = '\0';

	/* copy to secondary buffer which will be affected */
	strcpy(tmp_buf, buf);

	/* separate into argv */
	argc = make_argv(tmp_buf, sizeof(argv)/sizeof(argv[0]), argv);

	/* do the completion and return the possible completions */
	i = complete_cmdv(argc, argv, last_char, sizeof(cmdv)/sizeof(cmdv[0]), cmdv);

	/* no match; bell and out */
	if (i == 0) {
		if (argc > 1)	/* allow tab for non command */
			return 0;
		putc('\a');
		return 1;
	}

	s = NULL;
	len = 0;
	sep = NULL;
	seplen = 0;
	if (i == 1) { /* one match; perfect */
		k = strlen(argv[argc - 1]);
		s = cmdv[0] + k;
		len = strlen(s);
		sep = " ";
		seplen = 1;
	} else if (i > 1 && (j = find_common_prefix(cmdv)) != 0) {	/* more */
		k = strlen(argv[argc - 1]);
		j -= k;
		if (j > 0) {
			s = cmdv[0] + k;
			len = j;
		}
	}

	if (s != NULL) {
		k = len + seplen;
		/* make sure it fits */
		if (n + k >= CFG_CBSIZE - 2) {
			putc('\a');
			return 1;
		}

		t = buf + cnt;
		for (i = 0; i < len; i++)
			*t++ = *s++;
		if (sep != NULL)
			for (i = 0; i < seplen; i++)
				*t++ = sep[i];
		*t = '\0';
		n += k;
		col += k;
		puts(t - k);
		if (sep == NULL)
			putc('\a');
		*np = n;
		*colp = col;
	} else {
		print_argv(NULL, "  ", " ", 78, cmdv);

		puts(prompt);
		puts(buf);
	}
	return 1;
}

#endif
Commit	Line	Data
5dfa25f2	1	/*
8bde7f77	2	* (C) Copyright 2000-2003
5dfa25f2 WD	3	* Wolfgang Denk, DENX Software Engineering, [email protected].
	4	*
	5	* See file CREDITS for list of people who contributed to this
	6	* project.
	7	*
	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License as
	10	* published by the Free Software Foundation; either version 2 of
	11	* the License, or (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	21	* MA 02111-1307 USA
	22	*/
	23
	24	/*
	25	* Command Processor Table
	26	*/
	27
	28	#include <common.h>
	29	#include <command.h>
5dfa25f2 WD	30
	31	int
	32	do_version (cmd_tbl_t cmdtp, int flag, int argc, char argv[])
	33	{
	34	extern char version_string[];
	35	printf ("\n%s\n", version_string);
	36	return 0;
	37	}
	38
0d498393 WD	39	U_BOOT_CMD(
0d498393 WD	40	version, 1, 1, do_version,
b0fce99b WD	41	"version - print monitor version\n",
	42	NULL
	43	);
	44
5dfa25f2 WD	45	int
	46	do_echo (cmd_tbl_t cmdtp, int flag, int argc, char argv[])
	47	{
	48	int i, putnl = 1;
	49
	50	for (i = 1; i < argc; i++) {
	51	char *p = argv[i], c;
	52
	53	if (i > 1)
	54	putc(' ');
71f95118	55	while ((c = *p++) != '\0') {
5dfa25f2 WD	56	if (c == '\\' && *p == 'c') {
	57	putnl = 0;
	58	p++;
71f95118	59	} else {
5dfa25f2	60	putc(c);
71f95118 WD	61	}
71f95118 WD	62	}
5dfa25f2 WD	63	}
	64
	65	if (putnl)
	66	putc('\n');
	67	return 0;
	68	}
	69
0d498393 WD	70	U_BOOT_CMD(
0d498393 WD	71	echo, CFG_MAXARGS, 1, do_echo,
b0fce99b WD	72	"echo - echo args to console\n",
	73	"[args..]\n"
	74	" - echo args to console; \\c suppresses newline\n"
	75	);
	76
5dfa25f2 WD	77	/*
	78	* Use puts() instead of printf() to avoid printf buffer overflow
	79	* for long help messages
	80	*/
8bde7f77	81	int do_help (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
5dfa25f2 WD	82	{
	83	int i;
	84	int rcode = 0;
	85
8bde7f77 WD	86	if (argc == 1) { /show list of commands /
8bde7f77 WD	87
9d2b18a0 WD	88	int cmd_items = &__u_boot_cmd_end -
	89	&__u_boot_cmd_start; /* pointer arith! */
	90	cmd_tbl_t *cmd_array[cmd_items];
	91	int i, j, swaps;
	92
	93	/* Make array of commands from .uboot_cmd section */
	94	cmdtp = &__u_boot_cmd_start;
	95	for (i = 0; i < cmd_items; i++) {
	96	cmd_array[i] = cmdtp++;
8bde7f77	97	}
8bde7f77	98
9d2b18a0 WD	99	/* Sort command list (trivial bubble sort) */
	100	for (i = cmd_items - 1; i > 0; --i) {
	101	swaps = 0;
	102	for (j = 0; j < i; ++j) {
	103	if (strcmp (cmd_array[j]->name,
	104	cmd_array[j + 1]->name) > 0) {
	105	cmd_tbl_t *tmp;
	106	tmp = cmd_array[j];
	107	cmd_array[j] = cmd_array[j + 1];
	108	cmd_array[j + 1] = tmp;
	109	++swaps;
	110	}
8bde7f77	111	}
9d2b18a0 WD	112	if (!swaps)
9d2b18a0 WD	113	break;
8bde7f77	114	}
5dfa25f2	115
8bde7f77	116	/* print short help (usage) */
9d2b18a0 WD	117	for (i = 0; i < cmd_items; i++) {
	118	const char *usage = cmd_array[i]->usage;
	119
5dfa25f2	120	/* allow user abort */
8bde7f77	121	if (ctrlc ())
5dfa25f2	122	return 1;
9d2b18a0	123	if (usage == NULL)
5dfa25f2	124	continue;
9d2b18a0	125	puts (usage);
5dfa25f2	126	}
5dfa25f2 WD	127	return 0;
5dfa25f2 WD	128	}
5dfa25f2 WD	129	/*
	130	* command help (long version)
	131	*/
8bde7f77 WD	132	for (i = 1; i < argc; ++i) {
8bde7f77 WD	133	if ((cmdtp = find_cmd (argv[i])) != NULL) {
5dfa25f2 WD	134	#ifdef CFG_LONGHELP
	135	/* found - print (long) help info */
	136	puts (cmdtp->name);
	137	putc (' ');
	138	if (cmdtp->help) {
	139	puts (cmdtp->help);
	140	} else {
	141	puts ("- No help available.\n");
	142	rcode = 1;
	143	}
	144	putc ('\n');
	145	#else /* no long help available */
	146	if (cmdtp->usage)
	147	puts (cmdtp->usage);
	148	#endif /* CFG_LONGHELP */
71f95118	149	} else {
5dfa25f2 WD	150	printf ("Unknown command '%s' - try 'help'"
5dfa25f2 WD	151	" without arguments for list of all"
8bde7f77 WD	152	" known commands\n\n", argv[i]
8bde7f77 WD	153	);
5dfa25f2 WD	154	rcode = 1;
	155	}
	156	}
	157	return rcode;
	158	}
	159
8bde7f77	160
0d498393 WD	161	U_BOOT_CMD(
0d498393 WD	162	help, CFG_MAXARGS, 1, do_help,
8bde7f77 WD	163	"help - print online help\n",
	164	"[command ...]\n"
	165	" - show help information (for 'command')\n"
	166	"'help' prints online help for the monitor commands.\n\n"
	167	"Without arguments, it prints a short usage message for all commands.\n\n"
	168	"To get detailed help information for specific commands you can type\n"
	169	"'help' with one or more command names as arguments.\n"
	170	);
	171
0d498393 WD	172	/* This do not ust the U_BOOT_CMD macro as ? can't be used in symbol names */
	173	#ifdef CFG_LONGHELP
	174	cmd_tbl_t __u_boot_cmd_question_mark Struct_Section = {
8bde7f77 WD	175	"?", CFG_MAXARGS, 1, do_help,
	176	"? - alias for 'help'\n",
	177	NULL
0d498393 WD	178	};
	179	#else
	180	cmd_tbl_t __u_boot_cmd_question_mark Struct_Section = {
	181	"?", CFG_MAXARGS, 1, do_help,
	182	"? - alias for 'help'\n"
	183	};
	184	#endif /* CFG_LONGHELP */
8bde7f77	185
5dfa25f2 WD	186	/***************************************************************************
	187	* find command table entry for a command
	188	*/
8bde7f77	189	cmd_tbl_t find_cmd (const char cmd)
5dfa25f2 WD	190	{
5dfa25f2 WD	191	cmd_tbl_t *cmdtp;
8bde7f77	192	cmd_tbl_t cmdtp_temp = &__u_boot_cmd_start; /Init value */
9d2b18a0 WD	193	const char *p;
	194	int len;
	195	int n_found = 0;
	196
	197	/*
	198	* Some commands allow length modifiers (like "cp.b");
	199	* compare command name only until first dot.
	200	*/
	201	len = ((p = strchr(cmd, '.')) == NULL) ? strlen (cmd) : (p - cmd);
	202
	203	for (cmdtp = &__u_boot_cmd_start;
	204	cmdtp != &__u_boot_cmd_end;
	205	cmdtp++) {
	206	if (strncmp (cmd, cmdtp->name, len) == 0) {
	207	if (len == strlen (cmdtp->name))
	208	return cmdtp; /* full match */
	209
	210	cmdtp_temp = cmdtp; /* abbreviated command ? */
	211	n_found++;
	212	}
5dfa25f2	213	}
9d2b18a0	214	if (n_found == 1) { /* exactly one match */
8bde7f77	215	return cmdtp_temp;
9d2b18a0	216	}
5dfa25f2	217
9d2b18a0	218	return NULL; /* not found or ambiguous command */
8bde7f77	219	}
04a85b3b WD	220
	221	#ifdef CONFIG_AUTO_COMPLETE
	222
	223	int var_complete(int argc, char argv[], char last_char, int maxv, char cmdv[])
	224	{
	225	static char tmp_buf[512];
	226	int space;
	227
	228	space = last_char == '\0' \|\| last_char == ' ' \|\| last_char == '\t';
	229
	230	if (space && argc == 1)
	231	return env_complete("", maxv, cmdv, sizeof(tmp_buf), tmp_buf);
	232
	233	if (!space && argc == 2)
	234	return env_complete(argv[1], maxv, cmdv, sizeof(tmp_buf), tmp_buf);
	235
	236	return 0;
	237	}
	238
	239	static void install_auto_complete_handler(const char *cmd,
	240	int (complete)(int argc, char argv[], char last_char, int maxv, char *cmdv[]))
	241	{
	242	cmd_tbl_t *cmdtp;
	243
	244	cmdtp = find_cmd(cmd);
	245	if (cmdtp == NULL)
	246	return;
	247
	248	cmdtp->complete = complete;
	249	}
	250
	251	void install_auto_complete(void)
	252	{
	253	install_auto_complete_handler("printenv", var_complete);
	254	install_auto_complete_handler("setenv", var_complete);
	255	#if (CONFIG_COMMANDS & CFG_CMD_RUN)
	256	install_auto_complete_handler("run", var_complete);
	257	#endif
	258	}
	259
	260	/*************************************************************************************/
	261
	262	static int complete_cmdv(int argc, char argv[], char last_char, int maxv, char cmdv[])
	263	{
	264	cmd_tbl_t *cmdtp;
	265	const char *p;
	266	int len, clen;
	267	int n_found = 0;
	268	const char *cmd;
	269
	270	/* sanity? */
	271	if (maxv < 2)
	272	return -2;
	273
	274	cmdv[0] = NULL;
	275
	276	if (argc == 0) {
	277	/* output full list of commands */
	278	for (cmdtp = &__u_boot_cmd_start; cmdtp != &__u_boot_cmd_end; cmdtp++) {
	279	if (n_found >= maxv - 2) {
	280	cmdv[n_found++] = "...";
	281	break;
	282	}
	283	cmdv[n_found++] = cmdtp->name;
284	}
285	cmdv[n_found] = NULL;
286	return n_found;
287	}
288
289	/* more than one arg or one but the start of the next */
290	if (argc > 1 \|\| (last_char == '\0' \|\| last_char == ' ' \|\| last_char == '\t')) {
291	cmdtp = find_cmd(argv[0]);
292	if (cmdtp == NULL \|\| cmdtp->complete == NULL) {
293	cmdv[0] = NULL;
294	return 0;
295	}
296	return (*cmdtp->complete)(argc, argv, last_char, maxv, cmdv);
297	}
298
299	cmd = argv[0];
300	/*
301	* Some commands allow length modifiers (like "cp.b");
302	* compare command name only until first dot.
303	*/
304	p = strchr(cmd, '.');
305	if (p == NULL)
306	len = strlen(cmd);
307	else
308	len = p - cmd;
309
310	/* return the partial matches */
311	for (cmdtp = &__u_boot_cmd_start; cmdtp != &__u_boot_cmd_end; cmdtp++) {
312
313	clen = strlen(cmdtp->name);
314	if (clen < len)
315	continue;
316
317	if (memcmp(cmd, cmdtp->name, len) != 0)
318	continue;
319
320	/* too many! */
321	if (n_found >= maxv - 2) {
322	cmdv[n_found++] = "...";
323	break;
324	}
325
326	cmdv[n_found++] = cmdtp->name;
327	}
328
329	cmdv[n_found] = NULL;
330	return n_found;
331	}
332
333	static int make_argv(char s, int argvsz, char argv[])
334	{
335	int argc = 0;
336
337	/* split into argv */
338	while (argc < argvsz - 1) {
339
340	/* skip any white space */
341	while ((s == ' ') \|\| (s == '\t'))
342	++s;
343
344	if (s == '\0') / end of s, no more args */
345	break;
346
347	argv[argc++] = s; /* begin of argument string */
348
349	/* find end of string */
350	while (s && (s != ' ') && (*s != '\t'))
351	++s;
352
353	if (s == '\0') / end of s, no more args */
354	break;
355
356	s++ = '\0'; / terminate current arg */
357	}
358	argv[argc] = NULL;
359
360	return argc;
361	}
362
363	static void print_argv(const char banner, const char leader, const char sep, int linemax, char argv[])
364	{
365	int ll = leader != NULL ? strlen(leader) : 0;
366	int sl = sep != NULL ? strlen(sep) : 0;
367	int len, i;
368
369	if (banner) {
370	puts("\n");
371	puts(banner);
372	}
373
374	i = linemax; /* force leader and newline */
375	while (*argv != NULL) {
376	len = strlen(*argv) + sl;
377	if (i + len >= linemax) {
378	puts("\n");
379	if (leader)
380	puts(leader);
381	i = ll - sl;
382	} else if (sep)
383	puts(sep);
384	puts(*argv++);
385	i += len;
386	}
387	printf("\n");
388	}
389
390	static int find_common_prefix(char *argv[])
391	{
392	int i, len;
393	char anchor, s, *t;
394
395	if (*argv == NULL)
396	return 0;
397
398	/* begin with max */
399	anchor = *argv++;
400	len = strlen(anchor);
401	while ((t = *argv++) != NULL) {
402	s = anchor;
403	for (i = 0; i < len; i++, t++, s++) {
404	if (t != s)
405	break;
406	}
407	len = s - anchor;
408	}
409	return len;
410	}
411
412	static char tmp_buf[CFG_CBSIZE]; /* copy of console I/O buffer */
413
414	int cmd_auto_complete(const char const prompt, char buf, int np, int colp)
415	{
416	int n = np, col = colp;
417	char argv[CFG_MAXARGS + 1]; / NULL terminated */
418	char *cmdv[20];
419	char s, t;
420	const char *sep;
421	int i, j, k, len, seplen, argc;
422	int cnt;
423	char last_char;
424
425	if (strcmp(prompt, CFG_PROMPT) != 0)
426	return 0; /* not in normal console */
427
428	cnt = strlen(buf);
429	if (cnt >= 1)
430	last_char = buf[cnt - 1];
431	else
432	last_char = '\0';
433
434	/* copy to secondary buffer which will be affected */
435	strcpy(tmp_buf, buf);
436
437	/* separate into argv */
438	argc = make_argv(tmp_buf, sizeof(argv)/sizeof(argv[0]), argv);
439
440	/* do the completion and return the possible completions */
441	i = complete_cmdv(argc, argv, last_char, sizeof(cmdv)/sizeof(cmdv[0]), cmdv);
442
443	/* no match; bell and out */
444	if (i == 0) {
445	if (argc > 1) /* allow tab for non command */
446	return 0;
447	putc('\a');
448	return 1;
449	}
450
451	s = NULL;
452	len = 0;
453	sep = NULL;
454	seplen = 0;
455	if (i == 1) { /* one match; perfect */
456	k = strlen(argv[argc - 1]);
457	s = cmdv[0] + k;
458	len = strlen(s);
459	sep = " ";
460	seplen = 1;
461	} else if (i > 1 && (j = find_common_prefix(cmdv)) != 0) { /* more */
462	k = strlen(argv[argc - 1]);
463	j -= k;
464	if (j > 0) {
465	s = cmdv[0] + k;
466	len = j;
467	}
468	}
469
470	if (s != NULL) {
471	k = len + seplen;
472	/* make sure it fits */
473	if (n + k >= CFG_CBSIZE - 2) {
474	putc('\a');
475	return 1;
476	}
477
478	t = buf + cnt;
479	for (i = 0; i < len; i++)
480	t++ = s++;
481	if (sep != NULL)
482	for (i = 0; i < seplen; i++)
483	*t++ = sep[i];
484	*t = '\0';
485	n += k;
486	col += k;
487	puts(t - k);
488	if (sep == NULL)
489	putc('\a');
490	*np = n;
491	*colp = col;
492	} else {
493	print_argv(NULL, " ", " ", 78, cmdv);
494
495	puts(prompt);
496	puts(buf);
497	}
498	return 1;
499	}
500
501	#endif