/*
 * This C module implements the "basics" of TIFFS image analysis.
 */

#include <sys/types.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.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};

extern char *imgfile;
extern u32 eraseblk_size;
extern int total_blocks;
extern u32 total_ffs_size;
extern int index_blk_num, root_node_no;
extern int verbose;

u_char *image;

read_ffs_image()
{
	int fd;
	struct stat st;

	fd = open(imgfile, O_RDONLY);
	if (fd < 0) {
		perror(imgfile);
		exit(1);
	}
	fstat(fd, &st);
	if (!S_ISREG(st.st_mode)) {
		fprintf(stderr, "error: %s is not a regular file\n", imgfile);
		exit(1);
	}
	if (st.st_size < total_ffs_size) {
		fprintf(stderr,
			"error: %s is shorter than FFS size of 0x%lx bytes\n",
			imgfile, (u_long)total_ffs_size);
		exit(1);
	}
	image = mmap(NULL, total_ffs_size, PROT_READ, MAP_PRIVATE, fd, 0);
	if (image == MAP_FAILED) {
		perror("mmap");
		exit(1);
	}
}

cmd_blkhdr()
{
	int blk;
	u8 *blkhdr;

	read_ffs_image();
	for (blk = 0; blk < total_blocks; blk++) {
		printf("Block %3d: ", blk);
		blkhdr = image + blk * eraseblk_size;
		if (bcmp(blkhdr, tiffs_header, sizeof tiffs_header)) {
			printf("No TIFFS header\n");
			continue;
		}
		printf("age %02X%02X, type/status %02X\n",
			blkhdr[7], blkhdr[6], blkhdr[8]);
	}
	exit(0);
}