ckolivas/lrzip
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Update magic header info. It turns out I can't add.

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Fix fileinfo to be able to read version 0.6x files.
This commit is contained in:
Con Kolivas 2011-03-12 11:40:51 +11:00
parent fe68b9a3f7
commit 6642955375
2 changed files with 23 additions and 4 deletions
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4
doc/magic.header.txt
View file

@ -5,8 +5,8 @@ Con Kolivas
Byte Content
0-38 Magic
---
39->107 Rzip chunk data
108+ Data blocks
39->98 Rzip chunk data
99+ Data blocks
--- repeat
(end-MD5_DIGEST_SIZE)->(end) md5 hash

23
lrzip.c
View file

@ -439,7 +439,7 @@ void get_header_info(rzip_control *control, int fd_in, uchar *ctype, i64 *c_len,
void get_fileinfo(rzip_control *control)
{
i64 expected_size, infile_size;
i64 expected_size, infile_size, chunk_size;
int seekspot, fd_in;
char chunk_byte = 0;
long double cratio;
@ -480,6 +480,12 @@ void get_fileinfo(rzip_control *control)
if (control->major_version == 0 && control->minor_version > 4) {
if (unlikely(read(fd_in, &chunk_byte, 1) != 1))
fatal("Failed to read chunk_byte in get_fileinfo\n");
if (control->major_version == 0 && control->minor_version > 5) {
if (unlikely(read(fd_in, &control->eof, 1) != 1))
fatal("Failed to read eof in get_fileinfo\n");
if (unlikely(read(fd_in, &chunk_size, 8) != 8))
fatal("Failed to read chunk_size in get_fileinfo\n");
}
}
/* Version < 0.4 had different file format */
@ -489,6 +495,8 @@ void get_fileinfo(rzip_control *control)
seekspot = 74;
else if (control->major_version == 0 && control->minor_version == 5)
seekspot = 75;
else
seekspot = 99;
if (unlikely(lseek(fd_in, seekspot, SEEK_SET) == -1))
fatal("Failed to lseek in get_fileinfo\n");
@ -537,7 +545,7 @@ void get_fileinfo(rzip_control *control)
print_output("CRC32 used for integrity testing\n");
if (VERBOSE || MAX_VERBOSE) {
i64 u_len, c_len, last_head, utotal = 0, ctotal = 0, ofs = 25,
i64 u_len, c_len, last_head, utotal = 0, ctotal = 0, ofs = 49,
stream_head[2];
int header_length = 25, stream = 0, chunk = 0;
@ -547,6 +555,8 @@ void get_fileinfo(rzip_control *control)
}
if (control->major_version == 0 && control->minor_version == 4)
ofs = 24;
if (control->major_version == 0 && control->minor_version == 5)
ofs = 25;
next_chunk:
stream = 0;
stream_head[0] = 0;
@ -555,6 +565,8 @@ next_chunk:
print_output("Rzip chunk %d:\n", ++chunk);
if (chunk_byte)
print_verbose("Chunk byte width: %d\n", chunk_byte);
if (chunk_size)
print_verbose("Chunk size: %lld\n", chunk_size);
while (stream < NUM_STREAMS) {
int block = 1;
@ -606,6 +618,13 @@ next_chunk:
if (unlikely(read(fd_in, &chunk_byte, 1) != 1))
fatal("Failed to read chunk_byte in get_fileinfo\n");
ofs++;
if (control->major_version == 0 && control->minor_version > 5) {
if (unlikely(read(fd_in, &control->eof, 1) != 1))
fatal("Failed to read eof in get_fileinfo\n");
if (unlikely(read(fd_in, &chunk_size, 8) != 8))
fatal("Failed to read chunk_size in get_fileinfo\n");
ofs += 9;
}
}
if (ofs < infile_size - (HAS_MD5 ? MD5_DIGEST_SIZE : 0))
goto next_chunk;