}
struct data_in_s {
- unsigned char *start; /* 0 */
- unsigned char *stop; /* 4 */
- unsigned char bit; /* 8 */
- unsigned char x; /* 9 */
+ unsigned char *start;
+ unsigned char *stop;
+ unsigned char bitpos;
+ unsigned char byte;
};
struct data_out_s {
unsigned char *end;
};
-unsigned char fn_597c8(struct data_in_s *r6_data)
+unsigned char get_next_in_byte(struct data_in_s *data_in)
{
- unsigned char *r0;
- unsigned char *r1;
- unsigned char r5;
+ unsigned char byte;
- r5 = 0;
-
- r0 = r6_data->start;
- r1 = r6_data->stop;
-
- if (r1 < r0)
+ if (data_in->stop < data_in->start)
err_exit(__func__);
- r5 = *r0;
- r0++;
- r6_data->start = r0;
+ byte = *(data_in->start);
+ data_in->start++;
- return r5;
+ return byte;
}
-unsigned int fn_59848(struct data_in_s *r6_data)
+unsigned char get_next_bit(struct data_in_s *data_in)
{
- unsigned char r1;
- unsigned char r2;
- unsigned int r5;
+ unsigned char bitval;
- r1 = r6_data->bit;
- if (r1 == 0x80) {
- r6_data->x = fn_597c8(r6_data);
+ if (data_in->bitpos == 0x80) {
+ data_in->byte = get_next_in_byte(data_in);
}
- r1 = r6_data->bit;
- r2 = r6_data->x;
- r1 = r1 & r2;
- r5 = r1 & 0xff;
-
- r1 = r6_data->bit;
- r1 = r1 >> 1;
- r6_data->bit = r1;
- if (r1 == 0) {
- r1 = 0x80;
- r6_data->bit = r1;
+
+ bitval = data_in->bitpos & data_in->byte;
+
+ data_in->bitpos >>= 1;
+ if (data_in->bitpos == 0) {
+ data_in->bitpos = 0x80;
}
- if (r5 == 0)
+ if (bitval == 0)
return 0;
return 1;
}
-unsigned int fn_598b4(struct data_in_s *r11_data, unsigned int r10_arg2)
+unsigned int get_next_bits(struct data_in_s *data_in, unsigned int bits)
{
- unsigned int r1;
- unsigned int r2;
- unsigned int r6;
- unsigned int r7;
-
- r1 = r10_arg2 - 1;
- r6 = 1 << r1;
-
- r7 = 0;
- while (r6 != 0) {
- r1 = r11_data->bit;
- if (r1 == 0x80) {
- r1 = fn_597c8(r11_data);
- r11_data->x = r1;
+ 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);
}
- r1 = r11_data->bit;
- r2 = r11_data->x;
- r1 = r1 & r2;
- if (r1 != 0)
- r7 = r7 | r6;
- r6 = r6 >> 1;
+ if ((data_in->bitpos & data_in->byte) != 0)
+ next_bits = next_bits | bit;
- r2 = r11_data->bit;
- r2 = r2 >> 1;
- r11_data->bit = r2;
+ bit = bit >> 1;
- r1 = r11_data->bit;
- if(r1 == 0) {
- r11_data->bit = 0x80;
+ data_in->bitpos >>= 1;
+
+ if(data_in->bitpos == 0) {
+ data_in->bitpos = 0x80;
}
}
- return r7;
+ return next_bits;
}
-void fn_5980c(unsigned int arg1, struct data_out_s *data_out)
+void write_byte(unsigned char byte, struct data_out_s *data_out)
{
- unsigned char *r1;
- unsigned char *r2;
-
- r1 = data_out->pos;
- r2 = data_out->end;
-
- if (r1 > r2) {
- printf("r1: 0x%08x, r2: 0x%08x\n", (unsigned int)r1, (unsigned int)r2);
+ if (data_out->pos > data_out->end) {
err_exit(__func__);
}
- *r1 = arg1 & 0xff;
-
- r1++;
- data_out->pos = r1;
+ *(data_out->pos) = byte;
+ data_out->pos++;
}
-void lz_expand(struct data_in_s *r10_data, struct data_out_s *data_out)
+void lz_expand(struct data_in_s *data_in, struct data_out_s *data_out)
{
- unsigned int r5;
- unsigned int r2;
- unsigned char r4;
- unsigned int r6;
- unsigned int r7;
- unsigned int r11;
- unsigned char arr_59b64[2048];
+ unsigned int pos;
+ unsigned int offset;
+ unsigned int i;
+ unsigned char byte;
+ unsigned int num;
+ unsigned char buf[1024];
- r5 = 1;
+ pos = 1;
while (1) {
while (1) {
- r2 = fn_59848(r10_data);
- if (r2 == 0)
+ if (get_next_bit(data_in) == 0)
break;
- r2 = fn_598b4(r10_data, 8) & 0xff;
- r4 = r2;
+ byte = get_next_bits(data_in, 8);
- fn_5980c(r4, data_out);
- arr_59b64[r5] = r4 & 0xff;
- r2 = r5 + 1;
- r2 = r2 << 22;
- r2 = r2 >> 22;
- r5 = r2;
+ write_byte(byte, data_out);
+ buf[pos] = byte;
+ pos = (pos + 1) & 0x3ff;
}
- r11 = fn_598b4(r10_data, 0x0a);
- if(r11 == 0)
+ offset = get_next_bits(data_in, 0x0a);
+ if(offset == 0)
return;
- r2 = fn_598b4(r10_data, 0x04);
- r7 = r2 + 1;
- r6 = 0;
- while (r6 <= r7) {
- r2 = r6 + r11;
- r2 = r2 << 22;
- r2 = r2 >> 22;
- r4 = arr_59b64[r2];
- fn_5980c(r4, data_out);
- arr_59b64[r5] = r4;
- r2 = r5 + 1;
- r2 = r2 << 22;
- r2 = r2 >> 22;
- r5 = r2;
- r6++;
+ num = get_next_bits(data_in, 0x04) + 1;
+ for (i = 0; i <= num; i++) {
+ byte = buf[(offset + i) & 0x3ff];
+ write_byte(byte, data_out);
+ buf[pos] = byte;
+ pos = (pos + 1) & 0x3ff;
}
}
}
+/* Checksum is only used for the compressed firmware in 'firmware' */
+#if 0
unsigned int crc_check_59684(unsigned char *arg1, unsigned int arg2, unsigned int magic)
{
unsigned int r3;
return 4;
}
+#endif
void extract_lz_file(unsigned char *inbuf, unsigned char *name)
{
data_in.start = inbuf + 8;
data_in.stop = inbuf + len;
- data_in.x = 0;
- data_in.bit = 0x80;
+ data_in.byte = 0x00;
+ data_in.bitpos = 0x80;
data_out.pos = outbuf;
data_out.end = outbuf + len;
lz_expand(&data_in, &data_out);
#if 0
- /* This seems to still be completely broken */
+ /* Checksum is only used for the compressed firmware in 'firmware' */
r3 = r7 + 0x20;
r5 = *((unsigned int*)r3);
projects / rsbs2 / blobdiff