/*
 * This C module contains the main() function for the tiffs utility,
 * dispatching control to different operation commands.
 */

#include <sys/types.h>
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include "types.h"

u8 tiffs_header[6] = {'F', 'f', 's', '#', 0x10, 0x02};
u8 blank_flash_line[16] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
			   0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};

char *imgfile;
u32 eraseblk_size;
int total_blocks;
u32 total_ffs_size;
int index_blk_num = -1, root_node_no;
int offset_blocks;
int verbose;

parse_org_arg(arg)
	char *arg;
{
	char *cp;

	cp = index(arg, 'x');
	if (!cp || !isdigit(cp[1]) || !isdigit(arg[0])) {
		fprintf(stderr,
		"error: TIFFS organization argument \"%s\" is invalid\n", arg);
		exit(1);
	}
	*cp++ = '\0';
	if (!strcmp(arg, "16"))
		eraseblk_size = 0x4000;
	else if (!strcmp(arg, "32"))
		eraseblk_size = 0x8000;
	else if (!strcmp(arg, "64"))
		eraseblk_size = 0x10000;
	else if (!strcmp(arg, "128"))
		eraseblk_size = 0x20000;
	else if (!strcmp(arg, "256"))
		eraseblk_size = 0x40000;
	else {
		fprintf(stderr,
			"error: \"%s\" is not a recognized flash sector size\n",
			arg);
		exit(1);
	}
	total_blocks = atoi(cp);
	if (total_blocks < 1 || total_blocks > 128) {
		fprintf(stderr,
		"error: \"%s\" is not a reasonable number of FFS sectors\n",
			cp);
		exit(1);
	}
	total_ffs_size = eraseblk_size * total_blocks;
}

static struct cmdtab {
	char *cmd;
	int (*func)();
} cmdtab[] = {
	{"cat", NULL},
	{"fsck", NULL},
	{"ls", NULL},
	{"xtr", NULL},
	{NULL, NULL}
};

main(argc, argv)
	char **argv;
{
	extern int optind;
	extern char *optarg;
	int c;
	char *cmd;
	struct cmdtab *tp;

	while ((c = getopt(argc, argv, "+a:o:r:v")) != EOF)
		switch (c) {
		case 'a':
			index_blk_num = atoi(optarg);
			continue;
		case 'o':
			offset_blocks = atoi(optarg);
			continue;
		case 'r':
			root_node_no = atoi(optarg);
			continue;
		case 'v':
			verbose++;
			continue;
		default:
usage:			fprintf(stderr,
			"usage: %s [global-options] <imgfile> <org> <op> ...\n",
				argv[0]);
			exit(1);
		}
	if (argc - optind < 3)
		goto usage;
	imgfile = argv[optind];
	parse_org_arg(argv[optind+1]);
	cmd = argv[optind+2];

	for (tp = cmdtab; tp->cmd; tp++)
		if (!strcmp(tp->cmd, cmd))
			break;
	if (!tp->func) {
		fprintf(stderr,
			"%s: operation \"%s\" is unknown or unimplemented\n",
			argv[0], cmd);
		exit(1);
	}
	optind += 2;
	return tp->func(argc - optind, argv + optind);
}