@ -1,5 +1,5 @@
/*
* Copyright ( c ) 2009 - 2011 Thomas Schmitt
* Copyright ( c ) 2009 - 2020 Thomas Schmitt
*
* This file is part of the libisofs project ; you can redistribute it and / or
* modify it under the terms of the GNU General Public License version 2
@ -23,6 +23,7 @@
# include "../fsource.h"
# include "../util.h"
# include "../stream.h"
# include "../messages.h"
# include <sys/types.h>
# include <sys/time.h>
@ -44,6 +45,45 @@
*/
/* The lowest size of a file which shall not be represented by zisofs v1 */
# define ISO_ZISOFS_V1_LIMIT 4294967296
/* zisofs2: Test value for small mixed-version ISOs: 1 million
ISO_ZISOFS_V1_LIMIT 1000000
*/
/* Limit for overall count of allocated block pointers:
2 exp 25 = 256 MiB blocklist buffer = 4 TiB uncompressed at 128 KiB
*/
# define ISO_ZISOFS_MAX_BLOCKS_T 0x2000000
/* Function to account for global block pointers */
static uint64_t ziso_block_pointer_mgt ( uint64_t num , int mode ) ;
/* Limit for single files:
2 exp 25 = 256 MiB blocklist buffer = 4 TiB uncompressed at 128 KiB
*/
# define ISO_ZISOFS_MAX_BLOCKS_F 0x2000000
# ifdef Not_yeT
/* The number of blocks from which on the block pointer list shall be discarded
* on iso_stream_close ( ) of a compressing stream . This means that list and size
* have to be determined again on next ziso_stream_get_size ( ) .
* zisofs v1 with uint32_t pointers could at most have 131072 pointers .
* Since pointers are now uint64_t , the limit tolerates half of this .
*/
# define ISO_ZISOFS_MANY_BLOCKS 65537
# endif /* Not_yeT */
/* Minimum and maximum blocks sizes for version 1 and 2 */
# define ISO_ZISOFS_V1_MIN_LOG2 15
# define ISO_ZISOFS_V1_MAX_LOG2 17
# define ISO_ZISOFS_V2_MIN_LOG2 15
# define ISO_ZISOFS_V2_MAX_LOG2 20
/* --------------------------- ZisofsFilterRuntime ------------------------- */
@ -51,6 +91,13 @@
static uint8_t ziso_block_size_log2 = 15 ;
static int ziso_block_size = 32768 ;
static int ziso_v2_enabled = 0 ;
static int ziso_v2_block_size_log2 = 17 ;
static int ziso_v2_block_size = 1 < < 17 ;
static int64_t ziso_max_total_blocks = ISO_ZISOFS_MAX_BLOCKS_T ;
static int64_t ziso_max_file_blocks = ISO_ZISOFS_MAX_BLOCKS_F ;
/* Individual runtime properties exist only as long as the stream is opened.
*/
@ -58,10 +105,12 @@ typedef struct
{
int state ; /* processing: 0= header, 1= block pointers, 2= data blocks */
int zisofs_version ; /* 1 or 2 */
int block_size ;
int block_pointer_fill ;
int block_pointer_rpos ;
uint32 _t * block_pointers ; /* These are in use only with uncompression.
int64_t block_pointer_fill ;
int64_t block_pointer_rpos ;
uint64 _t * block_pointers ; /* These are in use only with uncompression.
Compression streams hold the pointer in
their persistent data .
*/
@ -87,8 +136,10 @@ int ziso_running_destroy(ZisofsFilterRuntime **running, int flag)
ZisofsFilterRuntime * o = * running ;
if ( o = = NULL )
return 0 ;
if ( o - > block_pointers ! = NULL )
if ( o - > block_pointers ! = NULL ) {
ziso_block_pointer_mgt ( ( uint64_t ) o - > block_pointer_fill , 2 ) ;
free ( o - > block_pointers ) ;
}
if ( o - > read_buffer ! = NULL )
free ( o - > read_buffer ) ;
if ( o - > block_buffer ! = NULL )
@ -101,6 +152,7 @@ int ziso_running_destroy(ZisofsFilterRuntime **running, int flag)
/*
* @ param flag bit0 = do not set block_size , do not allocate buffers
* bit1 = use ziso_v2_block_size
*/
static
int ziso_running_new ( ZisofsFilterRuntime * * running , int flag )
@ -112,6 +164,7 @@ int ziso_running_new(ZisofsFilterRuntime **running, int flag)
}
o - > state = 0 ;
o - > block_size = 0 ;
o - > zisofs_version = 0 ;
o - > block_pointer_fill = 0 ;
o - > block_pointer_rpos = 0 ;
o - > block_pointers = NULL ;
@ -128,11 +181,14 @@ int ziso_running_new(ZisofsFilterRuntime **running, int flag)
if ( flag & 1 )
return 1 ;
o - > block_size = ziso_block_size ;
if ( flag & 2 )
o - > block_size = ziso_v2_block_size ;
else
o - > block_size = ziso_block_size ;
# ifdef Libisofs_with_zliB
o - > buffer_size = compressBound ( ( uLong ) ziso_block_size ) ;
o - > buffer_size = compressBound ( ( uLong ) o - > block_size ) ;
# else
o - > buffer_size = 2 * ziso_ block_size;
o - > buffer_size = 2 * o - > block_size ;
# endif
o - > read_buffer = calloc ( o - > block_size , 1 ) ;
o - > block_buffer = calloc ( o - > buffer_size , 1 ) ;
@ -145,12 +201,52 @@ failed:
}
/* --------------------------- Resource accounting ------------------------- */
/* @param mode 0= inquire whether num block pointers would fit
1 = register num block pointers
2 = unregister num block_pointers
3 = return number of accounted block pointers
@ return if not mode 3 : 0 = does not fit , 1 = fits
*/
static
uint64_t ziso_block_pointer_mgt ( uint64_t num , int mode )
{
static uint64_t global_count = 0 ;
static int underrun = 0 ;
if ( mode = = 2 ) {
if ( global_count < num ) {
if ( underrun < 3 )
iso_msg_submit ( - 1 , ISO_ZISOFS_BPT_UNDERRUN , 0 ,
" Prevented global block pointer counter underrun " ) ;
underrun + + ;
global_count = 0 ;
} else {
global_count - = num ;
}
} else if ( mode = = 3 ) {
return global_count ;
} else {
if ( global_count + num > ( uint64_t ) ziso_max_total_blocks )
return 0 ;
if ( mode = = 1 )
global_count + = num ;
}
return 1 ;
}
/* ---------------------------- ZisofsFilterStreamData --------------------- */
/* The first 8 bytes of a zisofs compressed data file */
static unsigned char zisofs_magic [ 9 ] =
{ 0x37 , 0xE4 , 0x53 , 0x96 , 0xC9 , 0xDB , 0xD6 , 0x07 } ;
/* The first 8 bytes of a zisofs2 compressed data file */
static unsigned char zisofs2_magic [ 9 ] =
{ 0xEF , 0x22 , 0x55 , 0xA1 , 0xBC , 0x1B , 0x95 , 0xA0 } ;
/* Counts the number of active compression filters */
static off_t ziso_ref_count = 0 ;
@ -191,11 +287,13 @@ typedef struct
{
ZisofsFilterStreamData std ;
uint32 _t orig_size ;
uint32 _t * block_pointers ; /* Cache for output block addresses. They get
uint64 _t orig_size ;
uint64 _t * block_pointers ; /* Cache for output block addresses. They get
written before the data and so need 2 passes .
This cache avoids surplus passes .
*/
uint64_t block_pointer_counter ;
uint64_t open_counter ;
} ZisofsComprStreamData ;
@ -207,6 +305,7 @@ typedef struct
{
ZisofsFilterStreamData std ;
uint8_t zisofs_algo_num ;
unsigned char header_size_div4 ;
unsigned char block_size_log2 ;
@ -227,18 +326,61 @@ static ino_t ziso_ino_id = 0;
static
int ziso_stream_uncompress ( IsoStream * stream , void * buf , size_t desired ) ;
static
int ziso_stream_compress ( IsoStream * stream , void * buf , size_t desired ) ;
static
int ziso_decide_v2_usage ( off_t orig_size )
{
if ( ziso_v2_enabled > 1 | |
( ziso_v2_enabled = = 1 & & orig_size > = ( off_t ) ISO_ZISOFS_V1_LIMIT ) )
return 1 ;
return 0 ;
}
/*
* @ param flag bit0 = original stream is not open
* bit1 = do not destroy large
* ZisofsComprStreamData - > block_pointers
*/
static
int ziso_stream_close_flag ( IsoStream * stream , int flag )
{
ZisofsFilterStreamData * data ;
ZisofsComprStreamData * cstd = NULL ;
if ( stream = = NULL ) {
return ISO_NULL_POINTER ;
}
data = stream - > data ;
if ( stream - > class - > read = = & ziso_stream_compress )
cstd = ( ZisofsComprStreamData * ) data ;
# ifdef Not_yeT
/* >>> zisofs2:
research whether zisofs streams get opened and closed often */
if ( cstd ! = NULL ) {
int block_size ;
block_size = ziso_block_size ;
if ( ziso_decide_v2_usage ( cstd - > orig_size ) )
block_size = ziso_v2_block_size ;
if ( ( ! ( flag & 2 ) ) & & cstd - > open_counter = = 1 & &
cstd - > orig_size / block_size > = ISO_ZISOFS_MANY_BLOCKS ) {
if ( cstd - > block_pointers ! = NULL ) {
ziso_block_pointer_mgt ( cstd - > block_pointer_counter , 2 ) ;
free ( ( char * ) cstd - > block_pointers ) ;
}
cstd - > block_pointers = NULL ;
data - > size = - 1 ;
}
}
# endif /* Not_yeT */
if ( data - > running = = NULL ) {
return 1 ;
@ -246,6 +388,9 @@ int ziso_stream_close_flag(IsoStream *stream, int flag)
ziso_running_destroy ( & ( data - > running ) , 0 ) ;
if ( flag & 1 )
return 1 ;
if ( cstd ! = NULL )
if ( cstd - > open_counter > 0 )
cstd - > open_counter - - ;
return iso_stream_close ( data - > orig ) ;
}
@ -264,8 +409,9 @@ static
int ziso_stream_open_flag ( IsoStream * stream , int flag )
{
ZisofsFilterStreamData * data ;
ZisofsComprStreamData * cstd ;
ZisofsFilterRuntime * running = NULL ;
int ret ;
int ret , use_v2 = 0 ;
if ( stream = = NULL ) {
return ISO_NULL_POINTER ;
@ -280,9 +426,15 @@ int ziso_stream_open_flag(IsoStream *stream, int flag)
*/
stream - > class - > get_size ( stream ) ;
}
if ( stream - > class - > read = = & ziso_stream_compress ) {
cstd = ( ZisofsComprStreamData * ) data ;
cstd - > open_counter + + ;
use_v2 = ziso_decide_v2_usage ( ( off_t ) cstd - > orig_size ) ;
}
ret = ziso_running_new ( & running ,
stream - > class - > read = = & ziso_stream_uncompress ) ;
( stream - > class - > read = = & ziso_stream_uncompress ) |
( ( ! ! use_v2 ) < < 1 ) ) ;
if ( ret < 0 ) {
return ret ;
}
@ -316,6 +468,7 @@ int ziso_stream_compress(IsoStream *stream, void *buf, size_t desired)
off_t orig_size , next_pt ;
char * cbuf = buf ;
uLongf buf_len ;
uint64_t * copy_base , num_blocks = 0 ;
if ( stream = = NULL ) {
return ISO_NULL_POINTER ;
@ -334,18 +487,39 @@ int ziso_stream_compress(IsoStream *stream, void *buf, size_t desired)
/* Delivering file header */
if ( rng - > buffer_fill = = 0 ) {
memcpy ( rng - > block_buffer , zisofs_magic , 8 ) ;
orig_size = iso_stream_get_size ( data - > std . orig ) ;
if ( orig_size > 4294967295.0 ) {
num_blocks = orig_size / rng - > block_size +
1 + ! ! ( orig_size % rng - > block_size ) ;
if ( num_blocks > ( uint64_t ) ziso_max_file_blocks )
return ( rng - > error_ret = ISO_ZISOFS_TOO_LARGE ) ;
if ( ziso_block_pointer_mgt ( ( uint64_t ) num_blocks , 0 ) = = 0 )
return ( rng - > error_ret = ISO_ZISOFS_TOO_MANY_PTR ) ;
if ( orig_size ! = ( off_t ) data - > orig_size )
return ( rng - > error_ret = ISO_FILTER_WRONG_INPUT ) ;
if ( ziso_decide_v2_usage ( orig_size ) ) {
rng - > zisofs_version = 2 ;
memcpy ( rng - > block_buffer , zisofs2_magic , 8 ) ;
rng - > block_buffer [ 8 ] = 0 ; /* @hdr_version */
rng - > block_buffer [ 9 ] = 6 ; /* @hdr_size */
rng - > block_buffer [ 10 ] = 1 ; /* @alg_id */
rng - > block_buffer [ 11 ] = ziso_v2_block_size_log2 ;
iso_lsb64 ( ( uint8_t * ) ( rng - > block_buffer + 12 ) ,
( uint64_t ) orig_size ) ;
memset ( rng - > block_buffer + 20 , 0 , 4 ) ;
rng - > buffer_fill = 24 ;
} else {
if ( orig_size > = ( off_t ) ISO_ZISOFS_V1_LIMIT ) {
return ( rng - > error_ret = ISO_ZISOFS_TOO_LARGE ) ;
}
rng - > zisofs_version = 1 ;
memcpy ( rng - > block_buffer , zisofs_magic , 8 ) ;
iso_lsb ( ( unsigned char * ) ( rng - > block_buffer + 8 ) ,
( uint32_t ) orig_size , 4 ) ;
rng - > block_buffer [ 12 ] = 4 ;
rng - > block_buffer [ 13 ] = ziso_block_size_log2 ;
rng - > block_buffer [ 14 ] = rng - > block_buffer [ 15 ] = 0 ;
rng - > buffer_fill = 16 ;
}
data - > orig_size = orig_size ;
iso_lsb ( ( unsigned char * ) ( rng - > block_buffer + 8 ) ,
( uint32_t ) orig_size , 4 ) ;
rng - > block_buffer [ 12 ] = 4 ;
rng - > block_buffer [ 13 ] = ziso_block_size_log2 ;
rng - > block_buffer [ 14 ] = rng - > block_buffer [ 15 ] = 0 ;
rng - > buffer_fill = 16 ;
rng - > buffer_rpos = 0 ;
} else if ( rng - > buffer_rpos > = rng - > buffer_fill ) {
rng - > buffer_fill = rng - > buffer_rpos = 0 ;
@ -358,17 +532,25 @@ int ziso_stream_compress(IsoStream *stream, void *buf, size_t desired)
if ( rng - > block_pointer_fill = = 0 ) {
/* Initialize block pointer writing */
rng - > block_pointer_rpos = 0 ;
rng - > block_pointer_fill = data - > orig_size / rng - > block_size
+ 1 + ! ! ( data - > orig_size % rng - > block_size ) ;
num_blocks = data - > orig_size / rng - > block_size
+ 1 + ! ! ( data - > orig_size % rng - > block_size ) ;
rng - > block_pointer_fill = num_blocks ;
if ( data - > block_pointers = = NULL ) {
/* On the first pass, create pointer array with all 0s */
data - > block_pointers = calloc ( rng - > block_pointer_fill , 4 ) ;
if ( ziso_block_pointer_mgt ( num_blocks , 1 ) = = 0 ) {
rng - > block_pointer_fill = 0 ;
return ( rng - > error_ret = ISO_ZISOFS_TOO_MANY_PTR ) ;
}
data - > block_pointers = calloc ( rng - > block_pointer_fill , 8 ) ;
if ( data - > block_pointers = = NULL ) {
ziso_block_pointer_mgt ( num_blocks , 2 ) ;
rng - > block_pointer_fill = 0 ;
return ( rng - > error_ret = ISO_OUT_OF_MEM ) ;
}
data - > block_pointer_counter = rng - > block_pointer_fill ;
}
}
if ( rng - > buffer_rpos > = rng - > buffer_fill ) {
if ( rng - > block_pointer_rpos > = rng - > block_pointer_fill ) {
rng - > buffer_fill = rng - > buffer_rpos = 0 ;
@ -377,14 +559,26 @@ int ziso_stream_compress(IsoStream *stream, void *buf, size_t desired)
rng - > state = 2 ; /* block pointers are delivered */
} else {
/* Provide a buffer full of block pointers */
/* data->block_pointers was filled by ziso_stream_open() */
todo = rng - > block_pointer_fill - rng - > block_pointer_rpos ;
if ( todo * 4 > rng - > buffer_size )
todo = rng - > buffer_size / 4 ;
memcpy ( rng - > block_buffer ,
data - > block_pointers + rng - > block_pointer_rpos ,
todo * 4 ) ;
copy_base = data - > block_pointers + rng - > block_pointer_rpos ;
if ( rng - > zisofs_version = = 1 ) {
if ( todo * 4 > rng - > buffer_size )
todo = rng - > buffer_size / 4 ;
for ( i = 0 ; i < todo ; i + + )
iso_lsb ( ( unsigned char * ) ( rng - > block_buffer +
4 * i ) ,
( uint32_t ) ( copy_base [ i ] & 0xffffffff ) , 4 ) ;
rng - > buffer_fill = todo * 4 ;
} else {
if ( todo * 8 > rng - > buffer_size )
todo = rng - > buffer_size / 8 ;
for ( i = 0 ; i < todo ; i + + )
iso_lsb64 ( ( uint8_t * ) rng - > block_buffer + 8 * i ,
copy_base [ i ] ) ;
rng - > buffer_fill = todo * 8 ;
}
rng - > buffer_rpos = 0 ;
rng - > buffer_fill = todo * 4 ;
rng - > block_pointer_rpos + = todo ;
}
}
@ -396,7 +590,7 @@ int ziso_stream_compress(IsoStream *stream, void *buf, size_t desired)
rng - > block_size ) ;
if ( ret > 0 ) {
rng - > in_counter + = ret ;
if ( rng - > in_counter > data - > orig_size ) {
if ( ( uint64_t ) rng - > in_counter > data - > orig_size ) {
/* Input size became larger */
return ( rng - > error_ret = ISO_FILTER_WRONG_INPUT ) ;
}
@ -425,10 +619,11 @@ int ziso_stream_compress(IsoStream *stream, void *buf, size_t desired)
return ( rng - > error_ret = ISO_FILTER_WRONG_INPUT ) ;
}
/* Record resp. check block pointer */
/* Check or record check block pointer */
rng - > block_counter + + ;
if ( data - > block_pointers [ rng - > block_counter ] > 0 ) {
if ( next_pt ! = data - > block_pointers [ rng - > block_counter ] ) {
if ( ( uint64_t ) next_pt ! =
data - > block_pointers [ rng - > block_counter ] ) {
/* block pointers mismatch , content has changed */
return ( rng - > error_ret = ISO_FILTER_WRONG_INPUT ) ;
}
@ -438,7 +633,7 @@ int ziso_stream_compress(IsoStream *stream, void *buf, size_t desired)
} else if ( ret = = 0 ) {
rng - > state = 3 ;
if ( rng - > in_counter ! = data - > orig_size ) {
if ( ( uint64_t ) rng - > in_counter ! = data - > orig_size ) {
/* Input size shrunk */
return ( rng - > error_ret = ISO_FILTER_WRONG_INPUT ) ;
}
@ -478,24 +673,91 @@ int ziso_stream_compress(IsoStream *stream, void *buf, size_t desired)
static
int ziso_parse_zisofs_head ( IsoStream * stream , int * header_size_div4 ,
int * block_size_log2 , uint32_t * uncompressed_size ,
int flag )
int ziso_algo_to_num ( uint8_t zisofs_algo [ 2 ] )
{
int ret ;
char zisofs_head [ 16 ] ;
if ( zisofs_algo [ 0 ] = = ' p ' & & zisofs_algo [ 1 ] = = ' z ' )
return 0 ;
if ( zisofs_algo [ 0 ] = = ' P ' & & zisofs_algo [ 1 ] = = ' Z ' )
return 1 ;
return - 1 ;
}
ret = iso_stream_read ( stream , zisofs_head , 16 ) ;
static
int ziso_num_to_algo ( uint8_t num , uint8_t zisofs_algo [ 2 ] )
{
if ( num = = 0 ) {
zisofs_algo [ 0 ] = ' p ' ;
zisofs_algo [ 1 ] = ' z ' ;
return 1 ;
} else if ( num = = 1 ) {
zisofs_algo [ 0 ] = ' P ' ;
zisofs_algo [ 1 ] = ' Z ' ;
return 2 ;
}
return - 1 ;
}
/* @param flag bit0= recognize zisofs2 only if ziso_v2_enabled
*/
static
int ziso_parse_zisofs_head ( IsoStream * stream , uint8_t * ziso_algo_num ,
int * header_size_div4 , int * block_size_log2 ,
uint64_t * uncompressed_size , int flag )
{
int ret , consumed = 0 , i ;
char zisofs_head [ 24 ] ;
char waste_word [ 4 ] ;
ret = iso_stream_read ( stream , zisofs_head , 8 ) ;
if ( ret < 0 )
return ret ;
* header_size_div4 = ( ( unsigned char * ) zisofs_head ) [ 12 ] ;
* block_size_log2 = ( ( unsigned char * ) zisofs_head ) [ 13 ] ;
if ( ret ! = 16 | | memcmp ( zisofs_head , zisofs_magic , 8 ) ! = 0 | |
* header_size_div4 < 4 | |
* block_size_log2 < 15 | | * block_size_log2 > 17 ) {
if ( ret ! = 8 )
return ISO_ZISOFS_WRONG_INPUT ;
consumed = 8 ;
if ( memcmp ( zisofs_head , zisofs_magic , 8 ) = = 0 ) {
* ziso_algo_num = 0 ;
ret = iso_stream_read ( stream , zisofs_head + 8 , 8 ) ;
if ( ret < 0 )
return ret ;
if ( ret ! = 8 )
return ISO_ZISOFS_WRONG_INPUT ;
consumed + = 8 ;
* header_size_div4 = ( ( unsigned char * ) zisofs_head ) [ 12 ] ;
* block_size_log2 = ( ( unsigned char * ) zisofs_head ) [ 13 ] ;
* uncompressed_size = iso_read_lsb ( ( ( uint8_t * ) zisofs_head ) + 8 , 4 ) ;
if ( * header_size_div4 < 4 | |
* block_size_log2 < ISO_ZISOFS_V1_MIN_LOG2 | |
* block_size_log2 > ISO_ZISOFS_V1_MAX_LOG2 )
return ISO_ZISOFS_WRONG_INPUT ;
} else if ( memcmp ( zisofs_head , zisofs2_magic , 8 ) = = 0 & &
! ( ziso_v2_enabled = = 0 & & ( flag & 1 ) ) ) {
ret = iso_stream_read ( stream , zisofs_head + 8 , 16 ) ;
if ( ret < 0 )
return ret ;
if ( ret ! = 16 )
return ISO_ZISOFS_WRONG_INPUT ;
consumed + = 16 ;
* ziso_algo_num = zisofs_head [ 10 ] ;
* header_size_div4 = ( ( unsigned char * ) zisofs_head ) [ 9 ] ;
* block_size_log2 = ( ( unsigned char * ) zisofs_head ) [ 11 ] ;
* uncompressed_size = iso_read_lsb64 ( ( ( uint8_t * ) zisofs_head ) + 12 ) ;
if ( * header_size_div4 < 4 | |
* block_size_log2 < ISO_ZISOFS_V2_MIN_LOG2 | |
* block_size_log2 > ISO_ZISOFS_V2_MAX_LOG2 | | * ziso_algo_num ! = 1 )
return ISO_ZISOFS_WRONG_INPUT ;
} else {
return ISO_ZISOFS_WRONG_INPUT ;
}
* uncompressed_size = iso_read_lsb ( ( ( uint8_t * ) zisofs_head ) + 8 , 4 ) ;
for ( i = consumed ; i < * header_size_div4 ; i + + ) {
/* Skip surplus header words */
ret = iso_stream_read ( stream , waste_word , 4 ) ;
if ( ret < 0 )
return ret ;
if ( ret ! = 4 )
return ISO_ZISOFS_WRONG_INPUT ;
}
return 1 ;
}
@ -509,15 +771,16 @@ int ziso_stream_uncompress(IsoStream *stream, void *buf, size_t desired)
# ifdef Libisofs_with_zliB
int ret , todo , i , header_size , bs_log2 , block_max = 1 ;
int ret , todo , header_size , bs_log2 , block_max = 1 , blpt_size ;
ZisofsFilterStreamData * data ;
ZisofsFilterRuntime * rng ;
ZisofsUncomprStreamData * nstd ;
size_t fill = 0 ;
char * cbuf = buf ;
uLongf buf_len ;
uint32_t uncompressed_size ;
char waste_word [ 4 ] ;
uint64_t uncompressed_size ;
int64_t i ;
uint8_t algo_num , * rpt , * wpt ;
if ( stream = = NULL ) {
return ISO_NULL_POINTER ;
@ -535,46 +798,63 @@ int ziso_stream_uncompress(IsoStream *stream, void *buf, size_t desired)
while ( 1 ) {
if ( rng - > state = = 0 ) {
/* Reading file header */
ret = ziso_parse_zisofs_head ( data - > orig , & header_size , & bs_log2 ,
& uncompressed_size , 0 ) ;
ret = ziso_parse_zisofs_head ( data - > orig , & algo_num , & header_size ,
& bs_log2 , & uncompressed_size , 0 ) ;
if ( ret < 0 )
return ( rng - > error_ret = ret ) ;
if ( algo_num = = 0 )
blpt_size = 4 ;
else
blpt_size = 8 ;
nstd - > header_size_div4 = header_size ;
header_size * = 4 ;
data - > size = uncompressed_size ;
nstd - > block_size_log2 = bs_log2 ;
rng - > block_size = 1 < < bs_log2 ;
for ( i = 16 ; i < header_size ; i + = 4 ) {
/* Skip surplus header words */
ret = iso_stream_read ( data - > orig , waste_word , 4 ) ;
if ( ret < 0 )
return ( rng - > error_ret = ret ) ;
if ( ret ! = 4 )
return ( rng - > error_ret = ISO_ZISOFS_WRONG_INPUT ) ;
}
if ( desired = = 0 ) {
if ( desired = = 0 )
return 0 ;
}
/* Create and read pointer array */
rng - > block_pointer_rpos = 0 ;
rng - > block_pointer_fill = data - > size / rng - > block_size
+ 1 + ! ! ( data - > size % rng - > block_size ) ;
rng - > block_pointers = calloc ( rng - > block_pointer_fill , 4 ) ;
if ( rng - > block_pointer_fill > ziso_max_file_blocks ) {
rng - > block_pointer_fill = 0 ;
return ( rng - > error_ret = ISO_ZISOFS_TOO_LARGE ) ;
}
if ( ziso_block_pointer_mgt ( ( uint64_t ) rng - > block_pointer_fill , 1 )
= = 0 )
return ISO_ZISOFS_TOO_MANY_PTR ;
rng - > block_pointers = calloc ( rng - > block_pointer_fill , 8 ) ;
if ( rng - > block_pointers = = NULL ) {
ziso_block_pointer_mgt ( ( uint64_t ) rng - > block_pointer_fill , 2 ) ;
rng - > block_pointer_fill = 0 ;
return ( rng - > error_ret = ISO_OUT_OF_MEM ) ;
}
ret = iso_stream_read ( data - > orig , rng - > block_pointers ,
rng - > block_pointer_fill * 4 ) ;
rng - > block_pointer_fill * blpt_size ) ;
if ( ret < 0 )
return ( rng - > error_ret = ret ) ;
if ( ret ! = rng - > block_pointer_fill * 4 )
if ( algo_num = = 0 ) {
/* Spread 4 byte little-endian pointer values over 8 byte */
rpt = ( ( uint8_t * ) rng - > block_pointers )
+ rng - > block_pointer_fill * 4 ;
wpt = ( ( uint8_t * ) rng - > block_pointers )
+ rng - > block_pointer_fill * 8 ;
while ( rpt > ( ( uint8_t * ) rng - > block_pointers ) + 4 ) {
rpt - = 4 ;
wpt - = 8 ;
memcpy ( wpt , rpt , 4 ) ;
memset ( wpt + 4 , 0 , 4 ) ;
}
memset ( ( ( uint8_t * ) rng - > block_pointers ) + 4 , 0 , 4 ) ;
}
if ( ret ! = rng - > block_pointer_fill * blpt_size )
return ( rng - > error_ret = ISO_ZISOFS_WRONG_INPUT ) ;
for ( i = 0 ; i < rng - > block_pointer_fill ; i + + ) {
rng - > block_pointers [ i ] =
iso_read_lsb ( ( uint8_t * ) ( rng - > block_pointers + i ) , 4 ) ;
iso_read_lsb64 ( ( uint8_t * ) ( rng - > block_pointers + i ) ) ;
if ( i > 0 )
if ( ( int ) ( rng - > block_pointers [ i ] -
rng - > block_pointers [ i - 1 ] )
@ -704,7 +984,7 @@ off_t ziso_stream_get_size(IsoStream *stream)
count + = ret ;
}
}
ret_close = ziso_stream_close ( stream ) ;
ret_close = ziso_stream_close_flag ( stream , 2 ) ;
if ( ret < 0 )
return ret ;
if ( ret_close < 0 )
@ -754,8 +1034,10 @@ void ziso_stream_free(IsoStream *stream)
ziso_osiz_ref_count = 0 ;
} else {
nstd = stream - > data ;
if ( nstd - > block_pointers ! = NULL )
if ( nstd - > block_pointers ! = NULL ) {
ziso_block_pointer_mgt ( nstd - > block_pointer_counter , 2 ) ;
free ( ( char * ) nstd - > block_pointers ) ;
}
if ( - - ziso_ref_count < 0 )
ziso_ref_count = 0 ;
}
@ -807,6 +1089,7 @@ int ziso_clone_stream(IsoStream *old_stream, IsoStream **new_stream, int flag)
goto no_mem ;
stream_data = ( ZisofsFilterStreamData * ) uncompr ;
old_uncompr = ( ZisofsUncomprStreamData * ) old_stream - > data ;
uncompr - > zisofs_algo_num = old_uncompr - > zisofs_algo_num ;
uncompr - > header_size_div4 = old_uncompr - > header_size_div4 ;
uncompr - > block_size_log2 = old_uncompr - > block_size_log2 ;
} else {
@ -817,6 +1100,8 @@ int ziso_clone_stream(IsoStream *old_stream, IsoStream **new_stream, int flag)
old_compr = ( ZisofsComprStreamData * ) old_stream - > data ;
compr - > orig_size = old_compr - > orig_size ;
compr - > block_pointers = NULL ;
compr - > block_pointer_counter = 0 ;
compr - > open_counter = 0 ;
}
old_stream_data = ( ZisofsFilterStreamData * ) old_stream - > data ;
stream_data - > orig = new_input_stream ;
@ -971,13 +1256,16 @@ int ziso_filter_get_filter(FilterContext *filter, IsoStream *original,
str - > refcount = 1 ;
str - > data = data ;
if ( flag & 2 ) {
unstd - > zisofs_algo_num = 0 ;
unstd - > header_size_div4 = 0 ;
unstd - > block_size_log2 = 0 ;
str - > class = & ziso_stream_uncompress_class ;
ziso_osiz_ref_count + + ;
} else {
cnstd - > orig_size = 0 ;
cnstd - > orig_size = iso_stream_get_size ( original ) ;
cnstd - > block_pointers = NULL ;
cnstd - > block_pointer_counter = 0 ;
cnstd - > open_counter = 0 ;
str - > class = & ziso_stream_compress_class ;
ziso_ref_count + + ;
}
@ -1059,7 +1347,7 @@ int ziso_add_filter(IsoFile *file, int flag)
if ( original_size < = 0 | | ( ( flag & 1 ) & & original_size < = 2048 ) ) {
return 2 ;
}
if ( original_size > 4294967295.0 ) {
if ( original_size > = ( off_t ) ISO_ZISOFS_V1_LIMIT & & ! ziso_v2_enabled ) {
return ISO_ZISOFS_TOO_LARGE ;
}
}
@ -1119,9 +1407,9 @@ int iso_zisofs_get_refcounts(off_t *ziso_count, off_t *osiz_count, int flag)
}
int ziso_add_osiz_filter ( IsoFile * file , uint8_t header_size_div4 ,
uint8_t block_size_log2 , uint32_t uncompressed_size ,
int flag )
int ziso_add_osiz_filter ( IsoFile * file , uint8_t zisofs_algo [ 2 ] ,
uint8_t header_size_div4 , uint8_t block_size_log2 ,
uint64_t uncompressed_size , int flag )
{
# ifdef Libisofs_with_zliB
@ -1133,6 +1421,10 @@ int ziso_add_osiz_filter(IsoFile *file, uint8_t header_size_div4,
if ( ret < 0 )
return ret ;
unstd = iso_file_get_stream ( file ) - > data ;
ret = ziso_algo_to_num ( zisofs_algo ) ;
if ( ret < 0 )
return ISO_ZISOFS_WRONG_INPUT ;
unstd - > zisofs_algo_num = ret ;
unstd - > header_size_div4 = header_size_div4 ;
unstd - > block_size_log2 = block_size_log2 ;
unstd - > std . size = uncompressed_size ;
@ -1152,28 +1444,44 @@ int ziso_add_osiz_filter(IsoFile *file, uint8_t header_size_div4,
and eventual ZF field parameters
@ param flag bit0 = allow ziso_by_content which is based on content reading
bit1 = do not inquire stream - > class for filters
bit2 = recognize zisofs2 by magic only if ziso_v2_enabled
*/
int ziso_is_zisofs_stream ( IsoStream * stream , int * stream_type ,
uint8_t zisofs_algo [ 2 ] ,
int * header_size_div4 , int * block_size_log2 ,
uint32 _t * uncompressed_size , int flag )
uint64 _t * uncompressed_size , int flag )
{
int ret , close_ret ;
int ret , close_ret , algo_ret ;
ZisofsFilterStreamData * data ;
ZisofsComprStreamData * cnstd ;
ZisofsUncomprStreamData * unstd ;
uint8_t algo_num ;
* stream_type = 0 ;
if ( stream - > class = = & ziso_stream_compress_class & & ! ( flag & 2 ) ) {
* stream_type = 1 ;
cnstd = stream - > data ;
* header_size_div4 = 4 ;
* block_size_log2 = ziso_block_size_log2 ;
* uncompressed_size = cnstd - > orig_size ;
if ( ziso_decide_v2_usage ( ( off_t ) * uncompressed_size ) ) {
* block_size_log2 = ziso_v2_block_size_log2 ;
zisofs_algo [ 0 ] = ' P ' ;
zisofs_algo [ 1 ] = ' Z ' ;
} else if ( * uncompressed_size < ( uint64_t ) ISO_ZISOFS_V1_LIMIT ) {
* block_size_log2 = ziso_block_size_log2 ;
zisofs_algo [ 0 ] = ' p ' ;
zisofs_algo [ 1 ] = ' z ' ;
} else {
return 0 ;
}
return 1 ;
} else if ( stream - > class = = & ziso_stream_uncompress_class & & ! ( flag & 2 ) ) {
* stream_type = - 1 ;
data = stream - > data ;
unstd = stream - > data ;
ret = ziso_num_to_algo ( unstd - > zisofs_algo_num , zisofs_algo ) ;
if ( ret < 0 )
return ISO_ZISOFS_WRONG_INPUT ;
* header_size_div4 = unstd - > header_size_div4 ;
* block_size_log2 = unstd - > block_size_log2 ;
* uncompressed_size = data - > size ;
@ -1185,14 +1493,19 @@ int ziso_is_zisofs_stream(IsoStream *stream, int *stream_type,
ret = iso_stream_open ( stream ) ;
if ( ret < 0 )
return ret ;
ret = ziso_parse_zisofs_head ( stream , header_size_div4 ,
block_size_log2 , uncompressed_size , 0 ) ;
ret = ziso_parse_zisofs_head ( stream , & algo_num , header_size_div4 ,
block_size_log2 , uncompressed_size ,
( flag > > 2 ) & 1 ) ;
if ( ret = = 1 ) {
* stream_type = 2 ;
algo_ret = ziso_num_to_algo ( algo_num , zisofs_algo ) ;
} else {
ret = 0 ;
algo_ret = 1 ;
}
close_ret = iso_stream_close ( stream ) ;
if ( algo_ret < 0 )
return ISO_ZISOFS_WRONG_INPUT ;
if ( close_ret < 0 )
return close_ret ;
@ -1200,21 +1513,47 @@ int ziso_is_zisofs_stream(IsoStream *stream, int *stream_type,
}
/* API */
int iso_zisofs_set_params ( struct iso_zisofs_ctrl * params , int flag )
{
# ifdef Libisofs_with_zliB
if ( params - > version < 0 | | params - > version > 1 )
return ISO_WRONG_ARG_VALUE ;
if ( params - > compression_level < 0 | | params - > compression_level > 9 | |
params - > block_size_log2 < 15 | | params - > block_size_log2 > 17 ) {
params - > block_size_log2 < ISO_ZISOFS_V1_MIN_LOG2 | |
params - > block_size_log2 > ISO_ZISOFS_V1_MAX_LOG2 ) {
return ISO_WRONG_ARG_VALUE ;
}
if ( params - > version > = 1 )
if ( params - > v2_enabled < 0 | | params - > v2_enabled > 2 | |
( params - > v2_block_size_log2 ! = 0 & &
( params - > v2_block_size_log2 < ISO_ZISOFS_V2_MIN_LOG2 | |
params - > v2_block_size_log2 > ISO_ZISOFS_V2_MAX_LOG2 ) ) )
return ISO_WRONG_ARG_VALUE ;
if ( ziso_ref_count > 0 ) {
return ISO_ZISOFS_PARAM_LOCK ;
}
ziso_compression_level = params - > compression_level ;
ziso_block_size_log2 = params - > block_size_log2 ;
ziso_block_size = 1 < < ziso_block_size_log2 ;
if ( params - > version = = 0 )
return 1 ;
ziso_v2_enabled = params - > v2_enabled ;
if ( params - > v2_block_size_log2 > 0 )
ziso_v2_block_size_log2 = params - > v2_block_size_log2 ;
ziso_v2_block_size = 1 < < ziso_v2_block_size_log2 ;
if ( params - > max_total_blocks > 0 )
ziso_max_total_blocks = params - > max_total_blocks ;
if ( params - > max_file_blocks > 0 )
ziso_max_file_blocks = params - > max_file_blocks ;
/* >>> zisofs2: more parameters */
return 1 ;
# else
@ -1226,13 +1565,24 @@ int iso_zisofs_set_params(struct iso_zisofs_ctrl *params, int flag)
}
/* API */
int iso_zisofs_get_params ( struct iso_zisofs_ctrl * params , int flag )
{
# ifdef Libisofs_with_zliB
if ( params - > version < 0 | | params - > version > 1 )
return ISO_WRONG_ARG_VALUE ;
params - > compression_level = ziso_compression_level ;
params - > block_size_log2 = ziso_block_size_log2 ;
if ( params - > version = = 1 ) {
params - > v2_enabled = ziso_v2_enabled ;
params - > v2_block_size_log2 = ziso_v2_block_size_log2 ;
params - > max_total_blocks = ziso_max_total_blocks ;
params - > current_total_blocks = ziso_block_pointer_mgt ( ( uint64_t ) 0 , 3 ) ;
params - > max_file_blocks = ziso_max_file_blocks ;
}
return 1 ;
# else
@ -1243,3 +1593,21 @@ int iso_zisofs_get_params(struct iso_zisofs_ctrl *params, int flag)
}
/* API */
int iso_stream_get_zisofs_par ( IsoStream * stream , int * stream_type ,
uint8_t zisofs_algo [ 2 ] , uint8_t * algo_num ,
int * block_size_log2 , int flag )
{
uint64_t uncompressed_size ;
int header_size_div4 , ret ;
ret = ziso_is_zisofs_stream ( stream , stream_type , zisofs_algo ,
& header_size_div4 , block_size_log2 ,
& uncompressed_size , 0 ) ;
if ( ret < = 0 | | ( * stream_type ! = - 1 & & * stream_type ! = 1 ) )
return 0 ;
* algo_num = ziso_algo_to_num ( zisofs_algo ) ;
return 1 ;
}
