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

/*
 * (C) Copyright 2014, 2016 Leo C. <erbl259-lmu@yahoo.de>
 *
 * (C) Copyright 2000-2009
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * SPDX-License-Identifier:	GPL-2.0
 */

/*
 *  Command Processor Table
 */

#include "command.h"
#include "common.h"
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <setjmp.h>

#include "config.h"
#include "print-utils.h"
#include "con-utils.h"
#include "env.h"
#include "debug.h"


jmp_buf cmd_jbuf;


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 cmpstring_PP(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;

	char *optenv = getenv_str(PSTR("cmd"));
	bool opt_debug = optenv && strstr_P(optenv, PSTR("debug")) != NULL;

	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 *), cmpstring_PP);

		/* print short help (usage) */
		for (i = 0; i < cmd_items; i++) {
			if (opt_debug || cmd_array[i]->name[0] != '!') {
				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 &&
					(opt_debug || cmdtp->name[0] != '!')) {
			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;

	char *optenv = getenv_str(PSTR("cmd"));
	bool opt_debug = optenv && strstr_P(optenv, PSTR("debug")) != NULL;

	if (!cmd)
		return NULL;

	len = strlen(cmd);

	for (cmdtp = table;
	     cmdtp != table + table_len;
	     cmdtp++) {
		if (strncmp_P(cmd, cmdtp->name, len) == 0 &&
					(opt_debug || cmdtp->name[0] != '!')) {
			if (len == strlen_P(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 (setjmp(cmd_jbuf) != 0)
		return CMD_RET_FAILURE;

	/* 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
35edb766	1	/*
ccb6ffb9	2	* (C) Copyright 2014, 2016 Leo C. <erbl259-lmu@yahoo.de>
35edb766 L	3	*
	4	* (C) Copyright 2000-2009
	5	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	6	*
ccb6ffb9	7	* SPDX-License-Identifier: GPL-2.0
35edb766 L	8	*/
35edb766 L	9
d684c216 L	10	/*
	11	* Command Processor Table
	12	*/
	13
fcd2239e	14	#include "command.h"
d684c216	15	#include "common.h"
8f23e84c	16	#include <stdlib.h>
d684c216 L	17	#include <string.h>
d684c216 L	18	#include <ctype.h>
fcd2239e	19	#include <setjmp.h>
d684c216 L	20
d684c216 L	21	#include "config.h"
8f23e84c	22	#include "print-utils.h"
d684c216 L	23	#include "con-utils.h"
d684c216 L	24	#include "env.h"
8f23e84c	25	#include "debug.h"
fcd2239e L	26
	27
	28	jmp_buf cmd_jbuf;
d684c216 L	29
d684c216 L	30
deb08cb6 L	31	static void print_usage_line(const FLASH char *name, int width,
deb08cb6 L	32	const FLASH char *usage)
d684c216	33	{
deb08cb6 L	34	width -= strlen_P(name);
	35	if (width < 0)
	36	width = 0;
d684c216	37	my_puts_P(name);
deb08cb6	38	print_blanks(width);
d684c216 L	39	my_puts_P(PSTR(" - "));
	40	my_puts_P(usage);
	41	my_puts_P(PSTR("\n"));
	42	}
	43
	44	int strcmp_PP(const FLASH char s1, const FLASH char s2)
	45	{
	46	unsigned char c1, c2;
	47
c79c80b4	48	while ((c1 = (const FLASH unsigned char )s1++)
d684c216 L	49	== (c2 = (const FLASH unsigned char )s2++))
	50	if (c1 == 0)
	51	return 0;
	52
	53	return c1 - c2;
	54	}
	55
c79c80b4	56	int cmpstring_PP(const void p1, const void p2)
d684c216	57	{
c79c80b4	58	return strcmp_PP(((const FLASH cmd_tbl_t *) p1)->name,
d684c216 L	59	((const FLASH cmd_tbl_t *) p2)->name);
	60	}
	61
	62	int cmd_tbl_item_count(void)
	63	{
	64	cmd_tbl_t * p = cmd_tbl;
	65	int count = 0;
	66
	67	while (p->name != NULL) {
	68	p++; count++;
	69	}
	70	return count;
	71	}
	72
	73	/*
	74	* Use puts() instead of printf() to avoid printf buffer overflow
	75	* for long help messages
	76	*/
	77
d0581f88	78	command_ret_t _do_help(cmd_tbl_t cmd_start, int cmd_items, cmd_tbl_t cmdtp,
d684c216 L	79	int flag, int argc, char * const argv[])
d684c216 L	80	{
deb08cb6	81	uint_fast8_t i, max_len = 0;
d0581f88	82	command_ret_t rcode = CMD_RET_SUCCESS;
d684c216 L	83
	84	(void) flag;
	85
ccb6ffb9 L	86	char *optenv = getenv_str(PSTR("cmd"));
	87	bool opt_debug = optenv && strstr_P(optenv, PSTR("debug")) != NULL;
	88
d684c216 L	89	if (argc == 1) { /show list of commands /
	90	cmd_tbl_t *cmd_array[cmd_items];
	91	int i;
	92
	93	/* Make array of commands from .uboot_cmd section */
	94	cmdtp = cmd_start;
	95	for (i = 0; i < cmd_items; i++) {
	96	cmd_array[i] = cmdtp++;
deb08cb6 L	97	uint_fast8_t l = strlen_P(cmd_array[i]->name);
	98	if (l > max_len)
	99	max_len = l;
d684c216 L	100	}
	101
	102	/* Sort command list */
c79c80b4	103	qsort(cmd_array, cmd_items, sizeof (cmd_tbl_t *), cmpstring_PP);
d684c216 L	104
	105	/* print short help (usage) */
	106	for (i = 0; i < cmd_items; i++) {
ccb6ffb9 L	107	if (opt_debug \|\| cmd_array[i]->name[0] != '!') {
	108	const FLASH char *usage = cmd_array[i]->usage;
	109
	110	/* allow user abort */
	111	if (ctrlc ())
	112	return CMD_RET_FAILURE;
	113	if (usage == NULL)
	114	continue;
c79c80b4	115	#ifdef GCC_BUG_61443
ccb6ffb9	116	print_usage_line(cmd_array[i]->name, max_len, usage);
d684c216	117	#else
ccb6ffb9 L	118	printf_P(PSTR("%-" stringify(8) /FIXME/ "S - %S\n"),
ccb6ffb9 L	119	cmd_array[i]->name, usage);
d684c216	120	#endif
ccb6ffb9	121	}
d684c216	122	}
d0581f88	123	return CMD_RET_SUCCESS;
d684c216 L	124	}
	125	/*
	126	* command help (long version)
	127	*/
	128	for (i = 1; i < argc; ++i) {
ccb6ffb9 L	129	if ((cmdtp = find_cmd_tbl (argv[i], cmd_start, cmd_items )) != NULL &&
ccb6ffb9 L	130	(opt_debug \|\| cmdtp->name[0] != '!')) {
3f858d9f	131	cmd_usage(cmdtp);
d684c216 L	132	} else {
	133	printf_P(PSTR("Unknown command '%s' - try 'help'"
	134	" without arguments.\n\n"), argv[i]
	135	);
d0581f88	136	rcode = CMD_RET_FAILURE;
d684c216 L	137	}
	138	}
	139	return rcode;
	140	}
	141
	142	/***************************************************************************
	143	* find command table entry for a command
	144	*/
	145	cmd_tbl_t find_cmd_tbl (const char cmd, cmd_tbl_t *table, int table_len)
	146	{
	147	cmd_tbl_t *cmdtp;
	148	cmd_tbl_t cmdtp_temp = table; /Init value */
323398b1	149	size_t len;
d684c216 L	150	uint_fast8_t n_found = 0;
d684c216 L	151
ccb6ffb9 L	152	char *optenv = getenv_str(PSTR("cmd"));
	153	bool opt_debug = optenv && strstr_P(optenv, PSTR("debug")) != NULL;
	154
d684c216 L	155	if (!cmd)
	156	return NULL;
	157
	158	len = strlen(cmd);
	159
	160	for (cmdtp = table;
	161	cmdtp != table + table_len;
	162	cmdtp++) {
ccb6ffb9 L	163	if (strncmp_P(cmd, cmdtp->name, len) == 0 &&
ccb6ffb9 L	164	(opt_debug \|\| cmdtp->name[0] != '!')) {
5480dc65	165	if (len == strlen_P(cmdtp->name))
d684c216 L	166	return cmdtp; /* full match */
	167
	168	cmdtp_temp = cmdtp; /* abbreviated command ? */
	169	n_found++;
	170	}
	171	}
ccb6ffb9	172	if (n_found == 1) /* exactly one match */
d684c216	173	return cmdtp_temp;
d684c216 L	174
	175	return NULL; /* not found or ambiguous command */
	176	}
	177
	178
	179	cmd_tbl_t find_cmd (const char cmd)
	180	{
	181	return find_cmd_tbl(cmd, cmd_tbl, cmd_tbl_item_count());
	182	}
	183
	184
d0581f88	185	command_ret_t cmd_usage(const FLASH cmd_tbl_t *cmdtp)
d684c216 L	186	{
d684c216 L	187	// printf("%s - %s\n\n", cmdtp->name, cmdtp->usage);
deb08cb6	188	print_usage_line(cmdtp->name, 0, cmdtp->usage);
d684c216 L	189	#if 0
d684c216 L	190	my_puts_P(cmdtp->name);
deb08cb6	191	print_blanks(/FIXME/ 8 - strlen_P(cmdtp->name));
d684c216 L	192	my_puts_P(PSTR(" - "));
	193	my_puts_P(cmdtp->usage);
	194	my_puts_P(PSTR("\n\n"));
	195	#endif
	196	#ifdef CONFIG_SYS_LONGHELP
	197	// printf("Usage:\n%s ", cmdtp->name);
	198	my_puts_P(PSTR("Usage:\n"));
	199	my_puts_P(cmdtp->name);
f338df2a	200	my_puts_P(PSTR(" "));
d684c216 L	201
	202	if (!cmdtp->help) {
	203	my_puts_P(PSTR(" - No additional help available.\n"));
d0581f88	204	return CMD_RET_FAILURE;
d684c216 L	205	}
	206
	207	my_puts_P(cmdtp->help);
	208	my_puts_P(PSTR("\n"));
	209	#endif /* CONFIG_SYS_LONGHELP */
d0581f88	210	return CMD_RET_FAILURE;
d684c216 L	211	}
	212
	213	#ifdef CONFIG_AUTO_COMPLETE
	214
	215	int var_complete(int argc, char * const argv[], char last_char, int maxv, char *cmdv[])
	216	{
dea9a315	217	static char tmp_buf[CONFIG_SYS_CBSIZE];
d684c216 L	218	int space;
	219
	220	space = last_char == '\0' \|\| isblank(last_char);
	221
	222	if (space && argc == 1)
	223	return env_complete("", maxv, cmdv, sizeof(tmp_buf), tmp_buf);
	224
	225	if (!space && argc == 2)
	226	return env_complete(argv[1], maxv, cmdv, sizeof(tmp_buf), tmp_buf);
	227
	228	return 0;
	229	}
	230
	231	/*************************************************************************************/
	232
dea9a315 L	233	/* TODO: cmdtp points to FLASH */
dea9a315 L	234
d684c216 L	235	static int complete_cmdv(int argc, char * const argv[], char last_char, int maxv, char *cmdv[])
	236	{
	237	cmd_tbl_t *cmdtp = cmd_tbl;
	238	// const int count = ARRAY_SIZE(cmd_tbl);
	239	// const cmd_tbl_t *cmdend = cmdtp + count;
	240	// const char *p;
	241	int len, clen;
	242	int n_found = 0;
	243	const char *cmd;
	244
	245	/* sanity? */
	246	if (maxv < 2)
	247	return -2;
	248
	249	cmdv[0] = NULL;
	250
	251	if (argc == 0) {
	252	/* output full list of commands */
	253	for (; cmdtp->name[0] != '\0'; cmdtp++) {
	254	if (n_found >= maxv - 2) {
	255	cmdv[n_found++] = "...";
	256	break;
	257	}
	258	cmdv[n_found++] = cmdtp->name;
	259	}
	260	cmdv[n_found] = NULL;
	261	return n_found;
	262	}
	263
	264	/* more than one arg or one but the start of the next */
	265	if (argc > 1 \|\| (last_char == '\0' \|\| isblank(last_char))) {
	266	cmdtp = find_cmd(argv[0]);
	267	if (cmdtp == NULL \|\| cmdtp->complete == NULL) {
	268	cmdv[0] = NULL;
	269	return 0;
	270	}
	271	return (*cmdtp->complete)(argc, argv, last_char, maxv, cmdv);
	272	}
	273
	274	cmd = argv[0];
	275
	276	len = strlen(cmd);
	277
	278	/* return the partial matches */
	279	for (; cmdtp->name[0] != '\0'; cmdtp++) {
	280
	281	clen = strlen(cmdtp->name);
	282	if (clen < len)
	283	continue;
	284
	285	if (memcmp(cmd, cmdtp->name, len) != 0)
	286	continue;
	287
	288	/* too many! */
	289	if (n_found >= maxv - 2) {
	290	cmdv[n_found++] = "...";
	291	break;
	292	}
	293
	294	cmdv[n_found++] = cmdtp->name;
	295	}
	296
	297	cmdv[n_found] = NULL;
	298	return n_found;
299	}
300
301	static int make_argv(char s, int argvsz, char argv[])
302	{
303	int argc = 0;
304
305	/* split into argv */
306	while (argc < argvsz - 1) {
307
308	/* skip any white space */
309	while (isblank(*s))
310	++s;
311
312	if (s == '\0') / end of s, no more args */
313	break;
314
315	argv[argc++] = s; /* begin of argument string */
316
317	/* find end of string */
318	while (s && !isblank(s))
319	++s;
320
321	if (s == '\0') / end of s, no more args */
322	break;
323
324	s++ = '\0'; / terminate current arg */
325	}
326	argv[argc] = NULL;
327
328	return argc;
329	}
330
331	static void print_argv(const char banner, const char leader, const char sep, int linemax, char const argv[])
332	{
333	int ll = leader != NULL ? strlen(leader) : 0;
334	int sl = sep != NULL ? strlen(sep) : 0;
335	int len, i;
336
337	if (banner) {
338	my_puts_P(PSTR("\n"));
339	my_puts(banner);
340	}
341
342	i = linemax; /* force leader and newline */
343	while (*argv != NULL) {
344	len = strlen(*argv) + sl;
345	if (i + len >= linemax) {
346	my_puts_P(PSTR("\n"));
347	if (leader)
348	my_puts(leader);
349	i = ll - sl;
350	} else if (sep)
351	my_puts(sep);
352	my_puts(*argv++);
353	i += len;
354	}
355	my_puts_P(PSTR("\n"));
356	}
357
358	static int find_common_prefix(char * const argv[])
359	{
360	int i, len;
361	char anchor, s, *t;
362
363	if (*argv == NULL)
364	return 0;
365
366	/* begin with max */
367	anchor = *argv++;
368	len = strlen(anchor);
369	while ((t = *argv++) != NULL) {
370	s = anchor;
371	for (i = 0; i < len; i++, t++, s++) {
372	if (t != s)
373	break;
374	}
375	len = s - anchor;
376	}
377	return len;
378	}
379
380	static char tmp_buf[CONFIG_SYS_CBSIZE]; /* copy of console I/O buffer */
381
dea9a315	382
d684c216 L	383	int cmd_auto_complete(const FLASH char const prompt, char buf, int np, int colp)
	384	{
	385	int n = np, col = colp;
	386	char argv[CONFIG_SYS_MAXARGS + 1]; / NULL terminated */
	387	char *cmdv[20];
	388	char s, t;
	389	const char *sep;
	390	int i, j, k, len, seplen, argc;
	391	int cnt;
	392	char last_char;
	393
	394	if (strcmp_PP(prompt, CONFIG_SYS_PROMPT) != 0)
	395	return 0; /* not in normal console */
	396
	397	cnt = strlen(buf);
	398	if (cnt >= 1)
	399	last_char = buf[cnt - 1];
	400	else
	401	last_char = '\0';
	402
	403	/* copy to secondary buffer which will be affected */
	404	strcpy(tmp_buf, buf);
	405
	406	/* separate into argv */
	407	argc = make_argv(tmp_buf, sizeof(argv)/sizeof(argv[0]), argv);
	408
	409	/* do the completion and return the possible completions */
	410	i = complete_cmdv(argc, argv, last_char, sizeof(cmdv)/sizeof(cmdv[0]), cmdv);
	411
	412	/* no match; bell and out */
	413	if (i == 0) {
	414	if (argc > 1) /* allow tab for non command */
	415	return 0;
	416	putchar('\a');
	417	return 1;
	418	}
	419
	420	s = NULL;
	421	len = 0;
	422	sep = NULL;
	423	seplen = 0;
	424	if (i == 1) { /* one match; perfect */
	425	k = strlen(argv[argc - 1]);
	426	s = cmdv[0] + k;
	427	len = strlen(s);
	428	sep = " ";
	429	seplen = 1;
	430	} else if (i > 1 && (j = find_common_prefix(cmdv)) != 0) { /* more */
	431	k = strlen(argv[argc - 1]);
	432	j -= k;
	433	if (j > 0) {
	434	s = cmdv[0] + k;
	435	len = j;
	436	}
	437	}
	438
	439	if (s != NULL) {
	440	k = len + seplen;
	441	/* make sure it fits */
	442	if (n + k >= CONFIG_SYS_CBSIZE - 2) {
	443	putchar('\a');
	444	return 1;
	445	}
	446
447	t = buf + cnt;
448	for (i = 0; i < len; i++)
449	t++ = s++;
450	if (sep != NULL)
451	for (i = 0; i < seplen; i++)
452	*t++ = sep[i];
453	*t = '\0';
454	n += k;
455	col += k;
456	my_puts(t - k);
457	if (sep == NULL)
458	putchar('\a');
459	*np = n;
460	*colp = col;
461	} else {
462	print_argv(NULL, " ", " ", 78, cmdv);
463
464	my_puts_P(prompt);
465	my_puts(buf);
466	}
467	return 1;
468	}
469
470	#endif /* CONFIG_AUTO_COMPLETE */
471
472
473
474	/**
475	* Call a command function. This should be the only route in U-Boot to call
476	* a command, so that we can track whether we are waiting for input or
477	* executing a command.
478	*
479	* @param cmdtp Pointer to the command to execute
480	* @param flag Some flags normally 0 (see CMD_FLAG_.. above)
481	* @param argc Number of arguments (arg 0 must be the command text)
482	* @param argv Arguments
483	* @return 0 if command succeeded, else non-zero (CMD_RET_...)
484	*/
d0581f88	485	command_ret_t cmd_call(cmd_tbl_t cmdtp, int flag, int argc, char const argv[])
d684c216	486	{
d0581f88	487	command_ret_t result;
d684c216 L	488
d684c216 L	489	result = (cmdtp->cmd)(cmdtp, flag, argc, argv);
13e88ed5 L	490	// if (result != CMD_RET_SUCCESS)
13e88ed5 L	491	// debug("Command failed, result=%d\n", result);
d684c216 L	492	return result;
	493	}
	494
d0581f88	495	command_ret_t cmd_process(int flag, int argc, char * const argv[],
d684c216 L	496	uint_fast8_t *repeatable)
d684c216 L	497	{
d0581f88	498	command_ret_t rc = CMD_RET_SUCCESS;
d684c216 L	499	cmd_tbl_t *cmdtp;
	500
	501	/* Look up command in command table */
	502	cmdtp = find_cmd(argv[0]);
	503	if (cmdtp == NULL) {
	504	printf_P(PSTR("Unknown command '%s' - try 'help'\n"), argv[0]);
d0581f88	505	return CMD_RET_FAILURE;
d684c216 L	506	}
	507	if (!cmdtp->cmd) {
	508	debug("### Command '%s' found, but ->cmd == NULL \n", argv[0]);
d0581f88	509	return CMD_RET_FAILURE;
d684c216 L	510	}
	511
	512	/* found - check max args */
	513	if (argc > cmdtp->maxargs)
	514	rc = CMD_RET_USAGE;
	515
	516	#if defined(CONFIG_CMD_BOOTD)
	517	/* avoid "bootd" recursion */
	518	else if (cmdtp->cmd == do_bootd) {
	519	if (flag & CMD_FLAG_BOOTD) {
	520	my_puts_P(PSTR("'bootd' recursion detected\n"));
	521	rc = CMD_RET_FAILURE;
	522	} else {
	523	flag \|= CMD_FLAG_BOOTD;
	524	}
	525	}
	526	#endif
	527
fcd2239e L	528	if (setjmp(cmd_jbuf) != 0)
	529	return CMD_RET_FAILURE;
	530
d684c216 L	531	/* If OK so far, then do the command */
	532	if (!rc) {
	533	rc = cmd_call(cmdtp, flag, argc, argv);
	534	*repeatable &= cmdtp->repeatable;
	535	}
	536	if (rc == CMD_RET_USAGE)
	537	rc = cmd_usage(cmdtp);
	538	return rc;
	539	}
	540
	541	int cmd_process_error(cmd_tbl_t *cmdtp, int err)
	542	{
	543	char buf[strlen_P(cmdtp->name) + 1];
	544	strcpy_P(buf, cmdtp->name);
	545
	546	if (err) {
	547	printf_P(PSTR("Command '%s' failed: Error %d\n"), buf, err);
	548	return 1;
	549	}
	550
	551	return 0;
	552	}