diff options
Diffstat (limited to '')
| -rw-r--r-- | src/xz/coder.h | 42 |
1 files changed, 35 insertions, 7 deletions
diff --git a/src/xz/coder.h b/src/xz/coder.h index b4f43a2..96755f3 100644 --- a/src/xz/coder.h +++ b/src/xz/coder.h @@ -1,12 +1,12 @@ +// SPDX-License-Identifier: 0BSD + /////////////////////////////////////////////////////////////////////////////// // /// \file coder.h /// \brief Compresses or uncompresses a file // -// Author: Lasse Collin -// -// This file has been put into the public domain. -// You can do whatever you want with this file. +// Authors: Lasse Collin +// Jia Tan // /////////////////////////////////////////////////////////////////////////////// @@ -30,6 +30,16 @@ enum format_type { }; +/// Array of these hold the entries specified with --block-list. +typedef struct { + /// Uncompressed size of the Block + uint64_t size; + + /// Filter chain to use for this Block (chains[chain_num]) + unsigned chain_num; +} block_list_entry; + + /// Operation mode of the command line tool. This is set in args.c and read /// in several files. extern enum operation_mode opt_mode; @@ -50,9 +60,21 @@ extern bool opt_single_stream; /// of input. This has an effect only when compressing to the .xz format. extern uint64_t opt_block_size; -/// This is non-NULL if --block-list was used. This contains the Block sizes -/// as an array that is terminated with 0. -extern uint64_t *opt_block_list; +/// List of block size and filter chain pointer pairs. +extern block_list_entry *opt_block_list; + +/// Size of the largest Block that was specified in --block-list. +/// This is used to limit the block_size option of multithreaded encoder. +/// It's waste of memory to specify a too large block_size and reducing +/// it might even allow using more threads in some cases. +/// +/// NOTE: If the last entry in --block-list is the special value of 0 +/// (which gets converted to UINT64_MAX), it counts here as UINT64_MAX too. +/// This way the multithreaded encoder's Block size won't be reduced. +extern uint64_t block_list_largest; + +/// Bitmask indicating which filter chains we specified in --block-list. +extern uint32_t block_list_chain_mask; /// Set the integrity check type used when compressing extern void coder_set_check(lzma_check check); @@ -77,3 +99,9 @@ extern void coder_run(const char *filename); /// Free the memory allocated for the coder and kill the worker threads. extern void coder_free(void); #endif + +/// Create filter chain from string +extern void coder_add_filters_from_str(const char *filter_str); + +/// Add or overwrite a filter that can be used by the block-list. +extern void coder_add_block_filters(const char *str, size_t slot); |