lzip/lziprecover
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Adding upstream version 1.17~rc2.

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Signed-off-by: Daniel Baumann <daniel@debian.org>
This commit is contained in:
Daniel Baumann 2025-02-21 11:23:59 +01:00
parent 73f740a795
commit 27b84c299b
Signed by: daniel
GPG key ID: FBB4F0E80A80222F
12 changed files with 126 additions and 100 deletions
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24
lzip.h
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@ -40,7 +40,7 @@ public:
enum {
min_dictionary_bits = 12,
min_dictionary_size = 1 << min_dictionary_bits, // >= modeled_distances
min_dictionary_size = 1 << min_dictionary_bits, /* >= modeled_distances */
max_dictionary_bits = 29,
max_dictionary_size = 1 << max_dictionary_bits,
min_member_size = 36,
@ -53,7 +53,7 @@ enum {
dis_slot_bits = 6,
start_dis_model = 4,
end_dis_model = 14,
modeled_distances = 1 << (end_dis_model / 2), // 128
modeled_distances = 1 << (end_dis_model / 2), /* 128 */
dis_align_bits = 4,
dis_align_size = 1 << dis_align_bits,
@ -65,8 +65,8 @@ enum {
len_high_symbols = 1 << len_high_bits,
max_len_symbols = len_low_symbols + len_mid_symbols + len_high_symbols,
min_match_len = 2, // must be 2
max_match_len = min_match_len + max_len_symbols - 1, // 273
min_match_len = 2, /* must be 2 */
max_match_len = min_match_len + max_len_symbols - 1, /* 273 */
min_match_len_limit = 5 };
inline int get_len_state( const int len )
@ -186,9 +186,9 @@ const uint8_t magic_string[4] = { 0x4C, 0x5A, 0x49, 0x50 }; // "LZIP"
struct File_header
{
uint8_t data[6]; // 0-3 magic bytes
// 4 version
// 5 coded_dict_size
uint8_t data[6]; /* 0-3 magic bytes */
/* 4 version */
/* 5 coded_dict_size */
enum { size = 6 };
void set_magic() { std::memcpy( data, magic_string, 4 ); data[4] = 1; }
@ -214,9 +214,9 @@ struct File_header
if( sz > min_dictionary_size )
{
const unsigned base_size = 1 << data[5];
const unsigned wedge = base_size / 16;
const unsigned fraction = base_size / 16;
for( int i = 7; i >= 1; --i )
if( base_size - ( i * wedge ) >= sz )
if( base_size - ( i * fraction ) >= sz )
{ data[5] |= ( i << 5 ); break; }
}
return true;
@ -228,9 +228,9 @@ struct File_header
struct File_trailer
{
uint8_t data[20]; // 0-3 CRC32 of the uncompressed data
// 4-11 size of the uncompressed data
// 12-19 member size including header and trailer
uint8_t data[20]; /* 0-3 CRC32 of the uncompressed data */
/* 4-11 size of the uncompressed data */
/* 12-19 member size including header and trailer */
enum { size = 20 };