+++ /dev/null
-#include <stdio.h>
-#include <stdlib.h>
-#include <strings.h>
-#include <string.h>
-#include <unistd.h>
-#include <errno.h>
-#include "rsb-crc.h"
-#include "rsb-lz.h"
-#include "filesystem.h"
-
-void err_exit(const char *fname)
-{
- fprintf(stderr,"%s: error extracting...\n", fname);
- exit(1);
-}
-
-struct data_in_s {
- unsigned char *start;
- unsigned char *stop;
- unsigned char bitpos;
- unsigned char byte;
-};
-
-struct data_out_s {
- unsigned char *pos;
- unsigned char *end;
-};
-
-unsigned char get_next_in_byte(struct data_in_s *data_in)
-{
- unsigned char byte;
-
- if (data_in->stop < data_in->start)
- err_exit(__func__);
-
- byte = *(data_in->start);
- data_in->start++;
-
- return byte;
-}
-
-unsigned char get_next_bit(struct data_in_s *data_in)
-{
- unsigned char bitval;
-
- if (data_in->bitpos == 0x80) {
- data_in->byte = get_next_in_byte(data_in);
- }
-
- bitval = data_in->bitpos & data_in->byte;
-
- data_in->bitpos >>= 1;
- if (data_in->bitpos == 0) {
- data_in->bitpos = 0x80;
- }
-
- if (bitval == 0)
- return 0;
-
- return 1;
-}
-
-unsigned int get_next_bits(struct data_in_s *data_in, unsigned int bits)
-{
- unsigned int bit;
- unsigned int next_bits;
-
- bit = 1 << (bits - 1);
-
- next_bits = 0;
- while (bit != 0) {
- if (data_in->bitpos == 0x80) {
- data_in->byte = get_next_in_byte(data_in);
- }
-
- if ((data_in->bitpos & data_in->byte) != 0)
- next_bits = next_bits | bit;
-
- bit = bit >> 1;
-
- data_in->bitpos >>= 1;
-
- if(data_in->bitpos == 0) {
- data_in->bitpos = 0x80;
- }
- }
-
- return next_bits;
-}
-
-void write_byte(unsigned char byte, struct data_out_s *data_out)
-{
- if (data_out->pos > data_out->end) {
- err_exit(__func__);
- }
-
- *(data_out->pos) = byte;
- data_out->pos++;
-}
-
-void lz_expand(struct data_in_s *data_in, struct data_out_s *data_out)
-{
- unsigned int pos;
- unsigned int wordoffset;
- unsigned int i;
- unsigned char byte;
- unsigned int wordlen;
- unsigned char buf[1024];
-
- pos = 1;
-
- while (1) {
- while (1) {
- /* Compressed/uncompressed? */
- if (get_next_bit(data_in) == 0)
- break;
-
- /* Uncompressed byte */
- byte = get_next_bits(data_in, 8);
-
- write_byte(byte, data_out);
-
- /* Save byte in buffer, to be reused later */
- buf[pos] = byte;
- pos = (pos + 1) & 0x3ff;
- }
-
- /* offset for start of dictionary word */
- wordoffset = get_next_bits(data_in, 0x0a);
- if(wordoffset == 0)
- return;
-
- /* length of dictionary word used */
- wordlen = get_next_bits(data_in, 0x04) + 1;
- for (i = 0; i <= wordlen ; i++) {
- /* lookup dictionary byte */
- byte = buf[(wordoffset + i) & 0x3ff];
- write_byte(byte, data_out);
- /* Save byte in buffer, to be reused later */
- buf[pos] = byte;
- pos = (pos + 1) & 0x3ff;
- }
- }
-}
-
-void set_next_bit(unsigned char *buf, unsigned int set, unsigned int *currbit) {
- unsigned char *pos;
- unsigned char bitpos;
-
- if (set) {
- pos = buf + ((*currbit) / 8);
- bitpos = 0x80 >> ((*currbit) % 8);
- *pos |= bitpos;
- }
-
- *currbit = *currbit + 1;
-}
-
-void write_bits(unsigned char *buf, unsigned int data, unsigned int bits, unsigned int *currbit) {
- int i;
- unsigned int bitpos;
-
- bitpos = 1 << (bits - 1);
-
- for (i = 0; i < bits; i++) {
- set_next_bit(buf, data & bitpos, currbit);
- bitpos >>= 1;
- }
-}
-
-unsigned char *compress_lz(unsigned char *inbuf, int inlen, int *outlen)
-{
- unsigned char *end = inbuf + inlen;
- unsigned char *outbuf;
- unsigned char window[1024];
- int pos = 0;
- int fill = 0;
- unsigned int currbit = 0;
- int offset;
- int wordlen;
- int found;
- int i;
-
- if ((outbuf = malloc((inlen * 2) + 4)) == NULL) {
- perror("malloc");
- }
-
- *((unsigned int*)outbuf) = LZ_MAGIC;
- currbit = 8 * 8;
-
- while(inbuf < end) {
- found = 0;
- for (wordlen = 17; wordlen > 1; wordlen--) {
- for (offset = 1; offset < ((fill < 1023) ? fill : 1023); offset++) {
- if ((fill < 1023) &&
- (wordlen + offset > fill))
- break;
-
- for (i = 0; i < wordlen; i++) {
- if (inbuf[i] != window[(offset + i) & 0x3ff]) {
- break;
- }
- }
- if (i == wordlen)
- found = 1;
- }
- if (found)
- break;
- }
-
- if (found) {
- write_bits(outbuf, 0x00, 0x01, &currbit);
- write_bits(outbuf, offset, 0x0a, &currbit);
- write_bits(outbuf, wordlen - 1, 0x04, &currbit);
- for (i = 0; i < wordlen; i++) {
- window[pos] = *(inbuf + i);
- pos = (pos + 1) & 0x3ff;
- }
- inbuf += wordlen;
-
- if (fill < sizeof(window))
- fill += wordlen;
- } else {
- write_bits(outbuf, 0x01, 0x01, &currbit);
- write_bits(outbuf, *inbuf, 0x08, &currbit);
- window[pos] = *inbuf;
- pos = (pos + 1) & 0x3ff;
- inbuf++;
- if (fill < sizeof(window))
- fill++;
- }
- }
-
- write_bits(outbuf, 0x00, 0x01, &currbit);
- write_bits(outbuf, 0x00, 0x0a, &currbit);
-
- *outlen = (currbit / 8) + 1;
-
- *((unsigned int*)(outbuf + 4)) = *outlen;
-
- return outbuf;
-}
-
-/* Checksum is only used for the compressed firmware in 'firmware' */
-unsigned int crc_check(unsigned char *buf, unsigned int len, unsigned int magic)
-{
- unsigned int file_crc;
- unsigned int my_len;
- unsigned int crc;
- unsigned int my_magic;
-
- my_len = *((unsigned int*)(buf + 0x20));
- my_magic = *((unsigned int*)(buf + 0x24));
-
- if (my_magic != magic) {
- printf("\nmagic: 0x%08x <-> 0x%08x\n", my_magic, magic);
- return 2;
- }
-
- if (len < my_len)
- return 3;
-
- crc = ~rsb_crc(~0x00, buf, len);
- file_crc = *((unsigned int*)(buf + len));
-
- if (file_crc != crc) {
- printf("\nChecksums: 0x%08x <-> 0x%08x!\n", crc, file_crc);
- return 4;
- }
-
- return 0;
-}
-
-unsigned char *extract_lz_file(unsigned char *inbuf, unsigned int *outlen , unsigned char check_crc)
-{
- unsigned char *outbuf;
- struct data_in_s data_in;
- struct data_out_s data_out;
-
- if (*((unsigned int*)inbuf) != LZ_MAGIC)
- err_exit(__func__);
-
- *outlen = *((unsigned int*)(inbuf + 4));
- printf(", length: %d", *outlen);
-
- if ((outbuf = malloc(*outlen)) == NULL) {
- perror("malloc");
- exit(1);
- }
-
- bzero(outbuf, *outlen);
-
- data_in.start = inbuf + 8;
- data_in.stop = inbuf + *outlen;
- data_in.byte = 0x00;
- data_in.bitpos = 0x80;
-
- data_out.pos = outbuf;
- data_out.end = outbuf + *outlen;
-
- lz_expand(&data_in, &data_out);
-
- if (check_crc) {
- unsigned int crclen;
- int ret;
-
- crclen = *((unsigned int*)(outbuf + 0x20));
-
- if ((ret = crc_check(outbuf, crclen, 0x46335053)) != 0) {
- printf("crc_check return: %d\n", ret);
- err_exit(__func__);
- }
- }
-
- return outbuf;
-}
projects / rsbs2 / blobdiff