[z180-stamp.git] / avr / command.c

/*
 *  Command Processor Table
 */

#include "common.h"
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <stdio.h>

#include "config.h"
#include "print-utils.h"
#include "con-utils.h"
#ifdef CONFIG_AUTO_COMPLETE
#include "env.h"
#endif
#include "debug.h"
#include "command.h"


static void print_usage_line(const FLASH char *name, int width,
				const FLASH char *usage)
{
	width -= strlen_P(name);
	if (width < 0)
		width = 0;
	my_puts_P(name);
	print_blanks(width);
	my_puts_P(PSTR(" - "));
	my_puts_P(usage);
	my_puts_P(PSTR("\n"));
}

int strcmp_PP(const FLASH char *s1, const FLASH char *s2)
{
	unsigned char c1, c2;

	while ((c1 = *(const FLASH unsigned char *)s1++) 
			== (c2 = *(const FLASH unsigned char *)s2++))
		if (c1 == 0)
			return 0;

	return c1 - c2;
}

int cmpstringp(const void *p1, const void *p2)
{
	return strcmp_PP((*(const FLASH cmd_tbl_t **) p1)->name, 
		         (*(const FLASH cmd_tbl_t **) p2)->name);
}

int cmd_tbl_item_count(void)
{
	cmd_tbl_t * p = cmd_tbl;
	int count = 0;

	while (p->name != NULL) {
		p++; count++;
	}
	return count;
}

/*
 * Use puts() instead of printf() to avoid printf buffer overflow
 * for long help messages
 */

command_ret_t _do_help(cmd_tbl_t *cmd_start, int cmd_items, cmd_tbl_t * cmdtp,
		int flag, int argc, char * const argv[])
{
	uint_fast8_t i, max_len = 0;
	command_ret_t rcode = CMD_RET_SUCCESS;

	(void) flag;

	if (argc == 1) {	/*show list of commands */
		cmd_tbl_t *cmd_array[cmd_items];
		int i;

		/* Make array of commands from .uboot_cmd section */
		cmdtp = cmd_start;
		for (i = 0; i < cmd_items; i++) {
			cmd_array[i] = cmdtp++;
			uint_fast8_t l = strlen_P(cmd_array[i]->name);
			if (l > max_len)
				max_len = l;
		}

		/* Sort command list */
		qsort(cmd_array, cmd_items, sizeof (cmd_tbl_t *), cmpstringp);

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

			/* allow user abort */
			if (ctrlc ())
				return CMD_RET_FAILURE;
			if (usage == NULL)
				continue;
#ifdef GCC_BUG_61443 
			print_usage_line(cmd_array[i]->name, max_len, usage);
#else
			printf_P(PSTR("%-" stringify(8) /*FIXME*/ "S - %S\n"), 
					cmd_array[i]->name, usage);
#endif
		}
		return CMD_RET_SUCCESS;
	}
	/*
	 * command help (long version)
	 */
	for (i = 1; i < argc; ++i) {
		if ((cmdtp = find_cmd_tbl (argv[i], cmd_start, cmd_items )) != NULL) {
			rcode = cmd_usage(cmdtp);
		} else {
			printf_P(PSTR("Unknown command '%s' - try 'help'"
				" without arguments.\n\n"), argv[i]
				);
			rcode = CMD_RET_FAILURE;
		}
	}
	return rcode;
}

/***************************************************************************
 * find command table entry for a command
 */
cmd_tbl_t *find_cmd_tbl (const char *cmd, cmd_tbl_t *table, int table_len)
{
	cmd_tbl_t *cmdtp;
	cmd_tbl_t *cmdtp_temp = table;	/*Init value */
	size_t len;
	uint_fast8_t n_found = 0;

	if (!cmd)
		return NULL;

	len = strlen(cmd);

	for (cmdtp = table;
	     cmdtp != table + table_len;
	     cmdtp++) {
		if (strncmp_P (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 */
}


cmd_tbl_t *find_cmd (const char *cmd)
{
	return find_cmd_tbl(cmd, cmd_tbl, cmd_tbl_item_count());
}


command_ret_t cmd_usage(const FLASH cmd_tbl_t *cmdtp)
{
//	printf("%s - %s\n\n", cmdtp->name, cmdtp->usage);
	print_usage_line(cmdtp->name, 0, cmdtp->usage);
#if 0
	my_puts_P(cmdtp->name);
	print_blanks(/*FIXME*/ 8 - strlen_P(cmdtp->name));
	my_puts_P(PSTR(" - "));
	my_puts_P(cmdtp->usage);
	my_puts_P(PSTR("\n\n"));
#endif
#ifdef	CONFIG_SYS_LONGHELP
//	printf("Usage:\n%s ", cmdtp->name);
	my_puts_P(PSTR("Usage:\n"));
	my_puts_P(cmdtp->name);
	my_puts_P(PSTR(" "));

	if (!cmdtp->help) {
		my_puts_P(PSTR(" - No additional help available.\n"));
		return CMD_RET_FAILURE;
	}

	my_puts_P(cmdtp->help);
	my_puts_P(PSTR("\n"));
#endif	/* CONFIG_SYS_LONGHELP */
	return CMD_RET_FAILURE;
}

#ifdef CONFIG_AUTO_COMPLETE

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

	space = last_char == '\0' || isblank(last_char);

	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;
}

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

/* TODO: cmdtp points to FLASH */

static int complete_cmdv(int argc, char * const argv[], char last_char, int maxv, char *cmdv[])
{
	cmd_tbl_t *cmdtp = cmd_tbl;
//	const int count = ARRAY_SIZE(cmd_tbl);
//	const cmd_tbl_t *cmdend = cmdtp + count;
//	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->name[0] != '\0'; 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' || isblank(last_char))) {
		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];

	len = strlen(cmd);

	/* return the partial matches */
	for (; cmdtp->name[0] != '\0'; 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 (isblank(*s))
			++s;

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

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

		/* find end of string */
		while (*s && !isblank(*s))
			++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 * const argv[])
{
	int ll = leader != NULL ? strlen(leader) : 0;
	int sl = sep != NULL ? strlen(sep) : 0;
	int len, i;

	if (banner) {
		my_puts_P(PSTR("\n"));
		my_puts(banner);
	}

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

static int find_common_prefix(char * const 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[CONFIG_SYS_CBSIZE];	/* copy of console I/O buffer	*/


int cmd_auto_complete(const FLASH char *const prompt, char *buf, int *np, int *colp)
{
	int n = *np, col = *colp;
	char *argv[CONFIG_SYS_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_PP(prompt, CONFIG_SYS_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;
		putchar('\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 >= CONFIG_SYS_CBSIZE - 2) {
			putchar('\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;
		my_puts(t - k);
		if (sep == NULL)
			putchar('\a');
		*np = n;
		*colp = col;
	} else {
		print_argv(NULL, "  ", " ", 78, cmdv);

		my_puts_P(prompt);
		my_puts(buf);
	}
	return 1;
}

#endif /* CONFIG_AUTO_COMPLETE */


/**
 * Call a command function. This should be the only route in U-Boot to call
 * a command, so that we can track whether we are waiting for input or
 * executing a command.
 *
 * @param cmdtp		Pointer to the command to execute
 * @param flag		Some flags normally 0 (see CMD_FLAG_.. above)
 * @param argc		Number of arguments (arg 0 must be the command text)
 * @param argv		Arguments
 * @return 0 if command succeeded, else non-zero (CMD_RET_...)
 */
command_ret_t cmd_call(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
	command_ret_t result;

	result = (cmdtp->cmd)(cmdtp, flag, argc, argv);
	if (result != CMD_RET_SUCCESS)
		debug("Command failed, result=%d\n", result);
	return result;
}

command_ret_t cmd_process(int flag, int argc, char * const argv[],
			       uint_fast8_t *repeatable)
{
	command_ret_t rc = CMD_RET_SUCCESS;
	cmd_tbl_t *cmdtp;

	/* Look up command in command table */
	cmdtp = find_cmd(argv[0]);
	if (cmdtp == NULL) {
		printf_P(PSTR("Unknown command '%s' - try 'help'\n"), argv[0]);
		return CMD_RET_FAILURE;
	}
	if (!cmdtp->cmd) {
		debug("### Command '%s' found, but ->cmd == NULL \n", argv[0]);
		return CMD_RET_FAILURE;
	}

	/* found - check max args */
	if (argc > cmdtp->maxargs)
		rc = CMD_RET_USAGE;

#if defined(CONFIG_CMD_BOOTD)
	/* avoid "bootd" recursion */
	else if (cmdtp->cmd == do_bootd) {
		if (flag & CMD_FLAG_BOOTD) {
			my_puts_P(PSTR("'bootd' recursion detected\n"));
			rc = CMD_RET_FAILURE;
		} else {
			flag |= CMD_FLAG_BOOTD;
		}
	}
#endif

	/* If OK so far, then do the command */
	if (!rc) {
		rc = cmd_call(cmdtp, flag, argc, argv);
		*repeatable &= cmdtp->repeatable;
	}
	if (rc == CMD_RET_USAGE)
		rc = cmd_usage(cmdtp);
	return rc;
}

int cmd_process_error(cmd_tbl_t *cmdtp, int err)
{
	char buf[strlen_P(cmdtp->name) + 1];
	strcpy_P(buf, cmdtp->name);

	if (err) {
		printf_P(PSTR("Command '%s' failed: Error %d\n"), buf, err);
		return 1;
	}

	return 0;
}
Commit	Line	Data
d684c216 L	1	/*
	2	* Command Processor Table
	3	*/
	4
	5	#include "common.h"
8f23e84c	6	#include <stdlib.h>
d684c216 L	7	#include <string.h>
d684c216 L	8	#include <ctype.h>
d684c216 L	9	#include <stdio.h>
	10
	11	#include "config.h"
8f23e84c	12	#include "print-utils.h"
d684c216	13	#include "con-utils.h"
8f23e84c	14	#ifdef CONFIG_AUTO_COMPLETE
d684c216	15	#include "env.h"
8f23e84c L	16	#endif
8f23e84c L	17	#include "debug.h"
d684c216 L	18	#include "command.h"
	19
	20
deb08cb6 L	21	static void print_usage_line(const FLASH char *name, int width,
deb08cb6 L	22	const FLASH char *usage)
d684c216	23	{
deb08cb6 L	24	width -= strlen_P(name);
	25	if (width < 0)
	26	width = 0;
d684c216	27	my_puts_P(name);
deb08cb6	28	print_blanks(width);
d684c216 L	29	my_puts_P(PSTR(" - "));
	30	my_puts_P(usage);
	31	my_puts_P(PSTR("\n"));
	32	}
	33
	34	int strcmp_PP(const FLASH char s1, const FLASH char s2)
	35	{
	36	unsigned char c1, c2;
	37
	38	while ((c1 = (const FLASH unsigned char )s1++)
	39	== (c2 = (const FLASH unsigned char )s2++))
	40	if (c1 == 0)
	41	return 0;
	42
	43	return c1 - c2;
	44	}
	45
	46	int cmpstringp(const void p1, const void p2)
	47	{
	48	return strcmp_PP(((const FLASH cmd_tbl_t *) p1)->name,
	49	((const FLASH cmd_tbl_t *) p2)->name);
	50	}
	51
	52	int cmd_tbl_item_count(void)
	53	{
	54	cmd_tbl_t * p = cmd_tbl;
	55	int count = 0;
	56
	57	while (p->name != NULL) {
	58	p++; count++;
	59	}
	60	return count;
	61	}
	62
	63	/*
	64	* Use puts() instead of printf() to avoid printf buffer overflow
	65	* for long help messages
	66	*/
	67
d0581f88	68	command_ret_t _do_help(cmd_tbl_t cmd_start, int cmd_items, cmd_tbl_t cmdtp,
d684c216 L	69	int flag, int argc, char * const argv[])
d684c216 L	70	{
deb08cb6	71	uint_fast8_t i, max_len = 0;
d0581f88	72	command_ret_t rcode = CMD_RET_SUCCESS;
d684c216 L	73
	74	(void) flag;
	75
	76	if (argc == 1) { /show list of commands /
	77	cmd_tbl_t *cmd_array[cmd_items];
	78	int i;
	79
	80	/* Make array of commands from .uboot_cmd section */
	81	cmdtp = cmd_start;
	82	for (i = 0; i < cmd_items; i++) {
	83	cmd_array[i] = cmdtp++;
deb08cb6 L	84	uint_fast8_t l = strlen_P(cmd_array[i]->name);
	85	if (l > max_len)
	86	max_len = l;
d684c216 L	87	}
	88
	89	/* Sort command list */
	90	qsort(cmd_array, cmd_items, sizeof (cmd_tbl_t *), cmpstringp);
	91
	92	/* print short help (usage) */
	93	for (i = 0; i < cmd_items; i++) {
	94	const FLASH char *usage = cmd_array[i]->usage;
	95
	96	/* allow user abort */
	97	if (ctrlc ())
d0581f88	98	return CMD_RET_FAILURE;
d684c216 L	99	if (usage == NULL)
	100	continue;
	101	#ifdef GCC_BUG_61443
deb08cb6	102	print_usage_line(cmd_array[i]->name, max_len, usage);
d684c216	103	#else
deb08cb6	104	printf_P(PSTR("%-" stringify(8) /FIXME/ "S - %S\n"),
d684c216 L	105	cmd_array[i]->name, usage);
	106	#endif
	107	}
d0581f88	108	return CMD_RET_SUCCESS;
d684c216 L	109	}
	110	/*
	111	* command help (long version)
	112	*/
	113	for (i = 1; i < argc; ++i) {
	114	if ((cmdtp = find_cmd_tbl (argv[i], cmd_start, cmd_items )) != NULL) {
d0581f88	115	rcode = cmd_usage(cmdtp);
d684c216 L	116	} else {
	117	printf_P(PSTR("Unknown command '%s' - try 'help'"
	118	" without arguments.\n\n"), argv[i]
	119	);
d0581f88	120	rcode = CMD_RET_FAILURE;
d684c216 L	121	}
	122	}
	123	return rcode;
	124	}
	125
	126	/***************************************************************************
	127	* find command table entry for a command
	128	*/
	129	cmd_tbl_t find_cmd_tbl (const char cmd, cmd_tbl_t *table, int table_len)
	130	{
	131	cmd_tbl_t *cmdtp;
	132	cmd_tbl_t cmdtp_temp = table; /Init value */
323398b1	133	size_t len;
d684c216 L	134	uint_fast8_t n_found = 0;
	135
	136	if (!cmd)
	137	return NULL;
	138
	139	len = strlen(cmd);
	140
	141	for (cmdtp = table;
	142	cmdtp != table + table_len;
	143	cmdtp++) {
	144	if (strncmp_P (cmd, cmdtp->name, len) == 0) {
	145	if (len == strlen (cmdtp->name))
	146	return cmdtp; /* full match */
	147
	148	cmdtp_temp = cmdtp; /* abbreviated command ? */
	149	n_found++;
	150	}
	151	}
	152	if (n_found == 1) { /* exactly one match */
	153	return cmdtp_temp;
	154	}
	155
	156	return NULL; /* not found or ambiguous command */
	157	}
	158
	159
	160	cmd_tbl_t find_cmd (const char cmd)
	161	{
	162	return find_cmd_tbl(cmd, cmd_tbl, cmd_tbl_item_count());
	163	}
	164
	165
d0581f88	166	command_ret_t cmd_usage(const FLASH cmd_tbl_t *cmdtp)
d684c216 L	167	{
d684c216 L	168	// printf("%s - %s\n\n", cmdtp->name, cmdtp->usage);
deb08cb6	169	print_usage_line(cmdtp->name, 0, cmdtp->usage);
d684c216 L	170	#if 0
d684c216 L	171	my_puts_P(cmdtp->name);
deb08cb6	172	print_blanks(/FIXME/ 8 - strlen_P(cmdtp->name));
d684c216 L	173	my_puts_P(PSTR(" - "));
	174	my_puts_P(cmdtp->usage);
	175	my_puts_P(PSTR("\n\n"));
	176	#endif
	177	#ifdef CONFIG_SYS_LONGHELP
	178	// printf("Usage:\n%s ", cmdtp->name);
	179	my_puts_P(PSTR("Usage:\n"));
	180	my_puts_P(cmdtp->name);
f338df2a	181	my_puts_P(PSTR(" "));
d684c216 L	182
	183	if (!cmdtp->help) {
	184	my_puts_P(PSTR(" - No additional help available.\n"));
d0581f88	185	return CMD_RET_FAILURE;
d684c216 L	186	}
	187
	188	my_puts_P(cmdtp->help);
	189	my_puts_P(PSTR("\n"));
	190	#endif /* CONFIG_SYS_LONGHELP */
d0581f88	191	return CMD_RET_FAILURE;
d684c216 L	192	}
	193
	194	#ifdef CONFIG_AUTO_COMPLETE
	195
	196	int var_complete(int argc, char * const argv[], char last_char, int maxv, char *cmdv[])
	197	{
dea9a315	198	static char tmp_buf[CONFIG_SYS_CBSIZE];
d684c216 L	199	int space;
	200
	201	space = last_char == '\0' \|\| isblank(last_char);
	202
	203	if (space && argc == 1)
	204	return env_complete("", maxv, cmdv, sizeof(tmp_buf), tmp_buf);
	205
	206	if (!space && argc == 2)
	207	return env_complete(argv[1], maxv, cmdv, sizeof(tmp_buf), tmp_buf);
	208
	209	return 0;
	210	}
	211
	212	/*************************************************************************************/
	213
dea9a315 L	214	/* TODO: cmdtp points to FLASH */
dea9a315 L	215
d684c216 L	216	static int complete_cmdv(int argc, char * const argv[], char last_char, int maxv, char *cmdv[])
	217	{
	218	cmd_tbl_t *cmdtp = cmd_tbl;
	219	// const int count = ARRAY_SIZE(cmd_tbl);
	220	// const cmd_tbl_t *cmdend = cmdtp + count;
	221	// const char *p;
	222	int len, clen;
	223	int n_found = 0;
	224	const char *cmd;
	225
	226	/* sanity? */
	227	if (maxv < 2)
	228	return -2;
	229
	230	cmdv[0] = NULL;
	231
	232	if (argc == 0) {
	233	/* output full list of commands */
	234	for (; cmdtp->name[0] != '\0'; cmdtp++) {
	235	if (n_found >= maxv - 2) {
	236	cmdv[n_found++] = "...";
	237	break;
	238	}
	239	cmdv[n_found++] = cmdtp->name;
	240	}
	241	cmdv[n_found] = NULL;
	242	return n_found;
	243	}
	244
	245	/* more than one arg or one but the start of the next */
	246	if (argc > 1 \|\| (last_char == '\0' \|\| isblank(last_char))) {
	247	cmdtp = find_cmd(argv[0]);
	248	if (cmdtp == NULL \|\| cmdtp->complete == NULL) {
	249	cmdv[0] = NULL;
	250	return 0;
	251	}
	252	return (*cmdtp->complete)(argc, argv, last_char, maxv, cmdv);
	253	}
	254
	255	cmd = argv[0];
	256
	257	len = strlen(cmd);
	258
	259	/* return the partial matches */
	260	for (; cmdtp->name[0] != '\0'; cmdtp++) {
	261
	262	clen = strlen(cmdtp->name);
	263	if (clen < len)
	264	continue;
	265
	266	if (memcmp(cmd, cmdtp->name, len) != 0)
	267	continue;
	268
	269	/* too many! */
	270	if (n_found >= maxv - 2) {
	271	cmdv[n_found++] = "...";
	272	break;
	273	}
	274
	275	cmdv[n_found++] = cmdtp->name;
	276	}
	277
	278	cmdv[n_found] = NULL;
	279	return n_found;
280	}
281
282	static int make_argv(char s, int argvsz, char argv[])
283	{
284	int argc = 0;
285
286	/* split into argv */
287	while (argc < argvsz - 1) {
288
289	/* skip any white space */
290	while (isblank(*s))
291	++s;
292
293	if (s == '\0') / end of s, no more args */
294	break;
295
296	argv[argc++] = s; /* begin of argument string */
297
298	/* find end of string */
299	while (s && !isblank(s))
300	++s;
301
302	if (s == '\0') / end of s, no more args */
303	break;
304
305	s++ = '\0'; / terminate current arg */
306	}
307	argv[argc] = NULL;
308
309	return argc;
310	}
311
312	static void print_argv(const char banner, const char leader, const char sep, int linemax, char const argv[])
313	{
314	int ll = leader != NULL ? strlen(leader) : 0;
315	int sl = sep != NULL ? strlen(sep) : 0;
316	int len, i;
317
318	if (banner) {
319	my_puts_P(PSTR("\n"));
320	my_puts(banner);
321	}
322
323	i = linemax; /* force leader and newline */
324	while (*argv != NULL) {
325	len = strlen(*argv) + sl;
326	if (i + len >= linemax) {
327	my_puts_P(PSTR("\n"));
328	if (leader)
329	my_puts(leader);
330	i = ll - sl;
331	} else if (sep)
332	my_puts(sep);
333	my_puts(*argv++);
334	i += len;
335	}
336	my_puts_P(PSTR("\n"));
337	}
338
339	static int find_common_prefix(char * const argv[])
340	{
341	int i, len;
342	char anchor, s, *t;
343
344	if (*argv == NULL)
345	return 0;
346
347	/* begin with max */
348	anchor = *argv++;
349	len = strlen(anchor);
350	while ((t = *argv++) != NULL) {
351	s = anchor;
352	for (i = 0; i < len; i++, t++, s++) {
353	if (t != s)
354	break;
355	}
356	len = s - anchor;
357	}
358	return len;
359	}
360
361	static char tmp_buf[CONFIG_SYS_CBSIZE]; /* copy of console I/O buffer */
362
dea9a315	363
d684c216 L	364	int cmd_auto_complete(const FLASH char const prompt, char buf, int np, int colp)
	365	{
	366	int n = np, col = colp;
	367	char argv[CONFIG_SYS_MAXARGS + 1]; / NULL terminated */
	368	char *cmdv[20];
	369	char s, t;
	370	const char *sep;
	371	int i, j, k, len, seplen, argc;
	372	int cnt;
	373	char last_char;
	374
	375	if (strcmp_PP(prompt, CONFIG_SYS_PROMPT) != 0)
	376	return 0; /* not in normal console */
	377
	378	cnt = strlen(buf);
	379	if (cnt >= 1)
	380	last_char = buf[cnt - 1];
	381	else
	382	last_char = '\0';
	383
	384	/* copy to secondary buffer which will be affected */
	385	strcpy(tmp_buf, buf);
	386
	387	/* separate into argv */
	388	argc = make_argv(tmp_buf, sizeof(argv)/sizeof(argv[0]), argv);
	389
	390	/* do the completion and return the possible completions */
	391	i = complete_cmdv(argc, argv, last_char, sizeof(cmdv)/sizeof(cmdv[0]), cmdv);
	392
	393	/* no match; bell and out */
	394	if (i == 0) {
	395	if (argc > 1) /* allow tab for non command */
	396	return 0;
	397	putchar('\a');
	398	return 1;
	399	}
	400
	401	s = NULL;
	402	len = 0;
	403	sep = NULL;
	404	seplen = 0;
	405	if (i == 1) { /* one match; perfect */
	406	k = strlen(argv[argc - 1]);
	407	s = cmdv[0] + k;
	408	len = strlen(s);
	409	sep = " ";
	410	seplen = 1;
	411	} else if (i > 1 && (j = find_common_prefix(cmdv)) != 0) { /* more */
	412	k = strlen(argv[argc - 1]);
	413	j -= k;
	414	if (j > 0) {
	415	s = cmdv[0] + k;
	416	len = j;
	417	}
	418	}
	419
	420	if (s != NULL) {
	421	k = len + seplen;
	422	/* make sure it fits */
	423	if (n + k >= CONFIG_SYS_CBSIZE - 2) {
	424	putchar('\a');
	425	return 1;
	426	}
	427
428	t = buf + cnt;
429	for (i = 0; i < len; i++)
430	t++ = s++;
431	if (sep != NULL)
432	for (i = 0; i < seplen; i++)
433	*t++ = sep[i];
434	*t = '\0';
435	n += k;
436	col += k;
437	my_puts(t - k);
438	if (sep == NULL)
439	putchar('\a');
440	*np = n;
441	*colp = col;
442	} else {
443	print_argv(NULL, " ", " ", 78, cmdv);
444
445	my_puts_P(prompt);
446	my_puts(buf);
447	}
448	return 1;
449	}
450
451	#endif /* CONFIG_AUTO_COMPLETE */
452
453
454
455	/**
456	* Call a command function. This should be the only route in U-Boot to call
457	* a command, so that we can track whether we are waiting for input or
458	* executing a command.
459	*
460	* @param cmdtp Pointer to the command to execute
461	* @param flag Some flags normally 0 (see CMD_FLAG_.. above)
462	* @param argc Number of arguments (arg 0 must be the command text)
463	* @param argv Arguments
464	* @return 0 if command succeeded, else non-zero (CMD_RET_...)
465	*/
d0581f88	466	command_ret_t cmd_call(cmd_tbl_t cmdtp, int flag, int argc, char const argv[])
d684c216	467	{
d0581f88	468	command_ret_t result;
d684c216 L	469
d684c216 L	470	result = (cmdtp->cmd)(cmdtp, flag, argc, argv);
d0581f88	471	if (result != CMD_RET_SUCCESS)
d684c216 L	472	debug("Command failed, result=%d\n", result);
	473	return result;
	474	}
	475
d0581f88	476	command_ret_t cmd_process(int flag, int argc, char * const argv[],
d684c216 L	477	uint_fast8_t *repeatable)
d684c216 L	478	{
d0581f88	479	command_ret_t rc = CMD_RET_SUCCESS;
d684c216 L	480	cmd_tbl_t *cmdtp;
	481
	482	/* Look up command in command table */
	483	cmdtp = find_cmd(argv[0]);
	484	if (cmdtp == NULL) {
	485	printf_P(PSTR("Unknown command '%s' - try 'help'\n"), argv[0]);
d0581f88	486	return CMD_RET_FAILURE;
d684c216 L	487	}
	488	if (!cmdtp->cmd) {
	489	debug("### Command '%s' found, but ->cmd == NULL \n", argv[0]);
d0581f88	490	return CMD_RET_FAILURE;
d684c216 L	491	}
	492
	493	/* found - check max args */
	494	if (argc > cmdtp->maxargs)
	495	rc = CMD_RET_USAGE;
	496
	497	#if defined(CONFIG_CMD_BOOTD)
	498	/* avoid "bootd" recursion */
	499	else if (cmdtp->cmd == do_bootd) {
	500	if (flag & CMD_FLAG_BOOTD) {
	501	my_puts_P(PSTR("'bootd' recursion detected\n"));
	502	rc = CMD_RET_FAILURE;
	503	} else {
	504	flag \|= CMD_FLAG_BOOTD;
	505	}
	506	}
	507	#endif
	508
	509	/* If OK so far, then do the command */
	510	if (!rc) {
	511	rc = cmd_call(cmdtp, flag, argc, argv);
	512	*repeatable &= cmdtp->repeatable;
	513	}
	514	if (rc == CMD_RET_USAGE)
	515	rc = cmd_usage(cmdtp);
	516	return rc;
	517	}
	518
	519	int cmd_process_error(cmd_tbl_t *cmdtp, int err)
	520	{
	521	char buf[strlen_P(cmdtp->name) + 1];
	522	strcpy_P(buf, cmdtp->name);
	523
	524	if (err) {
	525	printf_P(PSTR("Command '%s' failed: Error %d\n"), buf, err);
	526	return 1;
	527	}
	528
	529	return 0;
	530	}