mirror of
https://github.com/exoticorn/upkr.git
synced 2026-01-20 11:36:42 +01:00
Compare commits
20 Commits
v0.2.0
...
0c5ba4e32c
| Author | SHA1 | Date | |
|---|---|---|---|
| 0c5ba4e32c | |||
|
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| 88cbda559c | |||
| f647449497 | |||
| 7186188118 | |||
| 588c1452b9 | |||
| 1e0c8bb5a7 | |||
| e11622202b | |||
| 795e6c3090 | |||
| 080db40d00 | |||
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f502bf4e28 | ||
| 2eb8f230ba | |||
| 4eab36b9d9 | |||
| 7cec54f62b | |||
| 7fa6be6ff4 | |||
| cab51e06ff | |||
| c4fce626da | |||
| 0d7cda06bb | |||
|
|
140678ae20 |
255
Cargo.lock
generated
255
Cargo.lock
generated
@@ -10,9 +10,15 @@ checksum = "38d9ff5d688f1c13395289f67db01d4826b46dd694e7580accdc3e8430f2d98e"
|
||||
|
||||
[[package]]
|
||||
name = "autocfg"
|
||||
version = "1.0.1"
|
||||
version = "1.1.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "cdb031dd78e28731d87d56cc8ffef4a8f36ca26c38fe2de700543e627f8a464a"
|
||||
checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
|
||||
|
||||
[[package]]
|
||||
name = "bitflags"
|
||||
version = "1.3.2"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
|
||||
|
||||
[[package]]
|
||||
name = "cc"
|
||||
@@ -56,6 +62,31 @@ dependencies = [
|
||||
"lazy_static",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "crossterm"
|
||||
version = "0.25.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "e64e6c0fbe2c17357405f7c758c1ef960fce08bdfb2c03d88d2a18d7e09c4b67"
|
||||
dependencies = [
|
||||
"bitflags",
|
||||
"crossterm_winapi",
|
||||
"libc",
|
||||
"mio",
|
||||
"parking_lot",
|
||||
"signal-hook",
|
||||
"signal-hook-mio",
|
||||
"winapi",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "crossterm_winapi"
|
||||
version = "0.9.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "2ae1b35a484aa10e07fe0638d02301c5ad24de82d310ccbd2f3693da5f09bf1c"
|
||||
dependencies = [
|
||||
"winapi",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "lazy_static"
|
||||
version = "1.4.0"
|
||||
@@ -70,9 +101,40 @@ checksum = "478ee9e62aaeaf5b140bd4138753d1f109765488581444218d3ddda43234f3e8"
|
||||
|
||||
[[package]]
|
||||
name = "libc"
|
||||
version = "0.2.108"
|
||||
version = "0.2.135"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "8521a1b57e76b1ec69af7599e75e38e7b7fad6610f037db8c79b127201b5d119"
|
||||
checksum = "68783febc7782c6c5cb401fbda4de5a9898be1762314da0bb2c10ced61f18b0c"
|
||||
|
||||
[[package]]
|
||||
name = "lock_api"
|
||||
version = "0.4.9"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "435011366fe56583b16cf956f9df0095b405b82d76425bc8981c0e22e60ec4df"
|
||||
dependencies = [
|
||||
"autocfg",
|
||||
"scopeguard",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "log"
|
||||
version = "0.4.17"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "abb12e687cfb44aa40f41fc3978ef76448f9b6038cad6aef4259d3c095a2382e"
|
||||
dependencies = [
|
||||
"cfg-if",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "mio"
|
||||
version = "0.8.4"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "57ee1c23c7c63b0c9250c339ffdc69255f110b298b901b9f6c82547b7b87caaf"
|
||||
dependencies = [
|
||||
"libc",
|
||||
"log",
|
||||
"wasi 0.11.0+wasi-snapshot-preview1",
|
||||
"windows-sys 0.36.1",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "num-traits"
|
||||
@@ -83,6 +145,29 @@ dependencies = [
|
||||
"autocfg",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "parking_lot"
|
||||
version = "0.12.1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "3742b2c103b9f06bc9fff0a37ff4912935851bee6d36f3c02bcc755bcfec228f"
|
||||
dependencies = [
|
||||
"lock_api",
|
||||
"parking_lot_core",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "parking_lot_core"
|
||||
version = "0.9.4"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "4dc9e0dc2adc1c69d09143aff38d3d30c5c3f0df0dad82e6d25547af174ebec0"
|
||||
dependencies = [
|
||||
"cfg-if",
|
||||
"libc",
|
||||
"redox_syscall",
|
||||
"smallvec",
|
||||
"windows-sys 0.42.0",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "pbr"
|
||||
version = "1.0.4"
|
||||
@@ -113,6 +198,15 @@ dependencies = [
|
||||
"proc-macro2",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "redox_syscall"
|
||||
version = "0.2.16"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "fb5a58c1855b4b6819d59012155603f0b22ad30cad752600aadfcb695265519a"
|
||||
dependencies = [
|
||||
"bitflags",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "sacabase"
|
||||
version = "2.0.0"
|
||||
@@ -122,6 +216,48 @@ dependencies = [
|
||||
"num-traits",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "scopeguard"
|
||||
version = "1.1.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"
|
||||
|
||||
[[package]]
|
||||
name = "signal-hook"
|
||||
version = "0.3.14"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "a253b5e89e2698464fc26b545c9edceb338e18a89effeeecfea192c3025be29d"
|
||||
dependencies = [
|
||||
"libc",
|
||||
"signal-hook-registry",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "signal-hook-mio"
|
||||
version = "0.2.3"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "29ad2e15f37ec9a6cc544097b78a1ec90001e9f71b81338ca39f430adaca99af"
|
||||
dependencies = [
|
||||
"libc",
|
||||
"mio",
|
||||
"signal-hook",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "signal-hook-registry"
|
||||
version = "1.4.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "e51e73328dc4ac0c7ccbda3a494dfa03df1de2f46018127f60c693f2648455b0"
|
||||
dependencies = [
|
||||
"libc",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "smallvec"
|
||||
version = "1.10.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "a507befe795404456341dfab10cef66ead4c041f62b8b11bbb92bffe5d0953e0"
|
||||
|
||||
[[package]]
|
||||
name = "syn"
|
||||
version = "1.0.101"
|
||||
@@ -160,7 +296,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "6db9e6914ab8b1ae1c260a4ae7a49b6c5611b40328a735b21862567685e73255"
|
||||
dependencies = [
|
||||
"libc",
|
||||
"wasi",
|
||||
"wasi 0.10.0+wasi-snapshot-preview1",
|
||||
"winapi",
|
||||
]
|
||||
|
||||
@@ -172,10 +308,11 @@ checksum = "dcc811dc4066ac62f84f11307873c4850cb653bfa9b1719cee2bd2204a4bc5dd"
|
||||
|
||||
[[package]]
|
||||
name = "upkr"
|
||||
version = "0.2.0"
|
||||
version = "0.2.2"
|
||||
dependencies = [
|
||||
"anyhow",
|
||||
"cdivsufsort",
|
||||
"crossterm",
|
||||
"lexopt",
|
||||
"pbr",
|
||||
"thiserror",
|
||||
@@ -187,6 +324,12 @@ version = "0.10.0+wasi-snapshot-preview1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "1a143597ca7c7793eff794def352d41792a93c481eb1042423ff7ff72ba2c31f"
|
||||
|
||||
[[package]]
|
||||
name = "wasi"
|
||||
version = "0.11.0+wasi-snapshot-preview1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
|
||||
|
||||
[[package]]
|
||||
name = "winapi"
|
||||
version = "0.3.9"
|
||||
@@ -208,3 +351,103 @@ name = "winapi-x86_64-pc-windows-gnu"
|
||||
version = "0.4.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
|
||||
|
||||
[[package]]
|
||||
name = "windows-sys"
|
||||
version = "0.36.1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "ea04155a16a59f9eab786fe12a4a450e75cdb175f9e0d80da1e17db09f55b8d2"
|
||||
dependencies = [
|
||||
"windows_aarch64_msvc 0.36.1",
|
||||
"windows_i686_gnu 0.36.1",
|
||||
"windows_i686_msvc 0.36.1",
|
||||
"windows_x86_64_gnu 0.36.1",
|
||||
"windows_x86_64_msvc 0.36.1",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "windows-sys"
|
||||
version = "0.42.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "5a3e1820f08b8513f676f7ab6c1f99ff312fb97b553d30ff4dd86f9f15728aa7"
|
||||
dependencies = [
|
||||
"windows_aarch64_gnullvm",
|
||||
"windows_aarch64_msvc 0.42.0",
|
||||
"windows_i686_gnu 0.42.0",
|
||||
"windows_i686_msvc 0.42.0",
|
||||
"windows_x86_64_gnu 0.42.0",
|
||||
"windows_x86_64_gnullvm",
|
||||
"windows_x86_64_msvc 0.42.0",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "windows_aarch64_gnullvm"
|
||||
version = "0.42.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "41d2aa71f6f0cbe00ae5167d90ef3cfe66527d6f613ca78ac8024c3ccab9a19e"
|
||||
|
||||
[[package]]
|
||||
name = "windows_aarch64_msvc"
|
||||
version = "0.36.1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "9bb8c3fd39ade2d67e9874ac4f3db21f0d710bee00fe7cab16949ec184eeaa47"
|
||||
|
||||
[[package]]
|
||||
name = "windows_aarch64_msvc"
|
||||
version = "0.42.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "dd0f252f5a35cac83d6311b2e795981f5ee6e67eb1f9a7f64eb4500fbc4dcdb4"
|
||||
|
||||
[[package]]
|
||||
name = "windows_i686_gnu"
|
||||
version = "0.36.1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "180e6ccf01daf4c426b846dfc66db1fc518f074baa793aa7d9b9aaeffad6a3b6"
|
||||
|
||||
[[package]]
|
||||
name = "windows_i686_gnu"
|
||||
version = "0.42.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "fbeae19f6716841636c28d695375df17562ca208b2b7d0dc47635a50ae6c5de7"
|
||||
|
||||
[[package]]
|
||||
name = "windows_i686_msvc"
|
||||
version = "0.36.1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "e2e7917148b2812d1eeafaeb22a97e4813dfa60a3f8f78ebe204bcc88f12f024"
|
||||
|
||||
[[package]]
|
||||
name = "windows_i686_msvc"
|
||||
version = "0.42.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "84c12f65daa39dd2babe6e442988fc329d6243fdce47d7d2d155b8d874862246"
|
||||
|
||||
[[package]]
|
||||
name = "windows_x86_64_gnu"
|
||||
version = "0.36.1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "4dcd171b8776c41b97521e5da127a2d86ad280114807d0b2ab1e462bc764d9e1"
|
||||
|
||||
[[package]]
|
||||
name = "windows_x86_64_gnu"
|
||||
version = "0.42.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "bf7b1b21b5362cbc318f686150e5bcea75ecedc74dd157d874d754a2ca44b0ed"
|
||||
|
||||
[[package]]
|
||||
name = "windows_x86_64_gnullvm"
|
||||
version = "0.42.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "09d525d2ba30eeb3297665bd434a54297e4170c7f1a44cad4ef58095b4cd2028"
|
||||
|
||||
[[package]]
|
||||
name = "windows_x86_64_msvc"
|
||||
version = "0.36.1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "c811ca4a8c853ef420abd8592ba53ddbbac90410fab6903b3e79972a631f7680"
|
||||
|
||||
[[package]]
|
||||
name = "windows_x86_64_msvc"
|
||||
version = "0.42.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "f40009d85759725a34da6d89a94e63d7bdc50a862acf0dbc7c8e488f1edcb6f5"
|
||||
|
||||
@@ -1,14 +1,18 @@
|
||||
[package]
|
||||
name = "upkr"
|
||||
version = "0.2.0"
|
||||
version = "0.2.2"
|
||||
edition = "2021"
|
||||
|
||||
[profile.release]
|
||||
strip = "debuginfo"
|
||||
|
||||
[features]
|
||||
terminal = ["crossterm", "pbr"]
|
||||
|
||||
[dependencies]
|
||||
cdivsufsort = "2"
|
||||
lexopt = "0.2.1"
|
||||
anyhow = "1"
|
||||
thiserror = "1.0.36"
|
||||
pbr = "1"
|
||||
pbr = { version = "1", optional = true }
|
||||
crossterm = { version = "0.25.0", default-features = false, optional = true }
|
||||
|
||||
30
README.md
30
README.md
@@ -20,20 +20,36 @@ is both about twice as fast and smaller than the Shrinkler unpacker.
|
||||
The release includes a reference c unpacker, as well as some optimized asm unpackers (arm and riscv). The unpckers in
|
||||
c_unpacker and asm_unpackers unpack the default upkr compressed format. The z80_unpacker
|
||||
is based on some variations to the compressed format. (Use `upkr --z80` to select those variations.)
|
||||
An optimized x86 (DOS) unpacker is currently being worked on out of tree.
|
||||
The 16 bit dos unpacker also uses some variations. (`upkr --x86`)
|
||||
|
||||
### More unpackers outside this repository
|
||||
|
||||
* [Atari Lynx](https://github.com/42Bastian/new_bll/blob/master/demos/depacker/unupkr.asm)
|
||||
* [Atari Jaguar](https://github.com/42Bastian/new_bjl/blob/main/exp/depacker/unupkr.js)
|
||||
* [8080, R800](https://github.com/ivagorRetrocomp/DeUpkr)
|
||||
* [6502](https://github.com/pfusik/upkr6502)
|
||||
|
||||
## Usage
|
||||
|
||||
```
|
||||
upkr [-l level(0-9)] [config options] <infile> [<outfile>]
|
||||
upkr -u [config options] <infile> [<outfile>]
|
||||
upkr --heatmap [config options] <infile> [<outfile>]
|
||||
upkr --margin [config options] <infile>
|
||||
|
||||
-l, --level N compression level 0-9
|
||||
-0, ..., -9 short form for setting compression level
|
||||
-u, --unpack unpack infile
|
||||
-d, --decompress decompress infile
|
||||
--heatmap calculate heatmap from compressed file
|
||||
--raw-cost report raw cost of literals in heatmap
|
||||
(the cost of literals is spread across all matches
|
||||
that reference the literal by default.)
|
||||
--hexdump print heatmap as colored hexdump
|
||||
--margin calculate margin for overlapped unpacking of a packed file
|
||||
|
||||
When no infile is given, or the infile is '-', read from stdin.
|
||||
When no outfile is given and reading from stdin, or when outfile is '-', write to stdout.
|
||||
|
||||
Config presets for specific unpackers:
|
||||
--z80 --big-endian-bitstream --invert-bit-encoding --simplified-prob-update -9
|
||||
--x86 --bitstream --invert-is-match-bit --invert-continue-value-bit --invert-new-offset-bit
|
||||
@@ -56,3 +72,13 @@ Config options to tailor output to specific optimized unpackers:
|
||||
--max-offset N
|
||||
--max-length N
|
||||
```
|
||||
|
||||
## Heatmap
|
||||
|
||||
By default, the `--heatmap` flag writes out the heatmap data as a binary file. The heatmap file is
|
||||
the same size as the unpacked data. Each byte can be interpreted like this:
|
||||
|
||||
```
|
||||
is_literal = byte & 1; // whether the byte was encoded as a literal (as opposed to a match)
|
||||
size_in_bits = 2.0 ** (((byte >> 1) - 64) / 8.0); // the size this byte takes up in the compressed data
|
||||
```
|
||||
|
||||
@@ -17,7 +17,7 @@
|
||||
upkr_unpack:
|
||||
push { r3-r11, lr }
|
||||
|
||||
mov r2, #384
|
||||
mov r2, #384
|
||||
mov r3, #128
|
||||
.Lclear:
|
||||
subs r2, r2, #1
|
||||
@@ -29,7 +29,7 @@ upkr_unpack:
|
||||
bl upkr_decode_bit
|
||||
bcc .Ldata
|
||||
.Lmatch:
|
||||
mov r5, #256
|
||||
mov r5, #256
|
||||
rsbs r6, r4, #0
|
||||
blcc upkr_decode_bit
|
||||
bcc .Lskip_offset
|
||||
@@ -39,7 +39,7 @@ upkr_unpack:
|
||||
popeq { r3-r11, pc }
|
||||
.Lskip_offset:
|
||||
|
||||
mov r5, #256+64
|
||||
mov r5, #256+64
|
||||
bl upkr_decode_length
|
||||
.Lcopy_loop:
|
||||
ldrb r5, [r0, r3]
|
||||
@@ -55,46 +55,46 @@ upkr_unpack:
|
||||
.Ldata_loop:
|
||||
bl upkr_decode_bit
|
||||
adc r5, r5, r5
|
||||
movs r4, r5, lsr #8
|
||||
movs r4, r5, lsr #8
|
||||
beq .Ldata_loop
|
||||
b .Lstore
|
||||
b .Lstore
|
||||
|
||||
.type upkr_decode_length, %function
|
||||
upkr_decode_length:
|
||||
mov r12, lr
|
||||
mov r12, lr
|
||||
|
||||
mov r4, #0
|
||||
mvn r6, #0
|
||||
mvn r6, #0
|
||||
.Lbit_loop:
|
||||
bl upkr_decode_bit_inc
|
||||
addcc r4, r4, r6
|
||||
movcc pc, r12
|
||||
addcc r4, r4, r6
|
||||
movcc pc, r12
|
||||
|
||||
bl upkr_decode_bit_inc
|
||||
addcs r4, r4, r6
|
||||
mov r6, r6, lsl #1
|
||||
mov r6, r6, lsl #1
|
||||
b .Lbit_loop
|
||||
|
||||
.type upkr_decode_bit, %function
|
||||
upkr_decode_bit_inc:
|
||||
add r5, r5, #1
|
||||
add r5, r5, #1
|
||||
upkr_decode_bit:
|
||||
cmp r2, #4096
|
||||
ldrltb r8, [r1], #1
|
||||
orrlt r2, r8, r2, lsl#8
|
||||
blt upkr_decode_bit
|
||||
cmp r2, #4096
|
||||
ldrltb r8, [r1], #1
|
||||
orrlt r2, r8, r2, lsl#8
|
||||
blt upkr_decode_bit
|
||||
|
||||
ldrb r8, [sp, -r5]
|
||||
and r9, r2, #255
|
||||
add r9, r9, #1
|
||||
cmp r8, r9
|
||||
rsbcs r8, r8, #256
|
||||
mvn r9, r2, lsr#8
|
||||
addcs r9, r9, #1
|
||||
mla r2, r8, r9, r2
|
||||
add r9, r8, #8
|
||||
sub r8, r8, r9, lsr#4
|
||||
rsbcs r8, r8, #256
|
||||
strb r8, [sp, -r5]
|
||||
mov pc, r14
|
||||
and r9, r2, #255
|
||||
add r9, r9, #1
|
||||
cmp r8, r9
|
||||
rsbcs r8, r8, #256
|
||||
mvn r9, r2, lsr#8
|
||||
addcs r9, r9, #1
|
||||
mla r2, r8, r9, r2
|
||||
add r9, r8, #8
|
||||
sub r8, r8, r9, lsr#4
|
||||
rsbcs r8, r8, #256
|
||||
strb r8, [sp, -r5]
|
||||
mov pc, r14
|
||||
|
||||
|
||||
190
asm_unpackers/unpack_jagrisc.js
Normal file
190
asm_unpackers/unpack_jagrisc.js
Normal file
@@ -0,0 +1,190 @@
|
||||
;;; -*-asm-*-
|
||||
;;; ukpr unpacker for Atari Jaguar RISC.
|
||||
|
||||
;;; lyxass syntax
|
||||
|
||||
|
||||
; input:
|
||||
;;; R20 : packed buffer
|
||||
;;; R21 : output buffer
|
||||
;;; r30 : return address
|
||||
;;;
|
||||
;;; Register usage (destroyed!)
|
||||
;;; r0-r17,r20,r21
|
||||
;;;
|
||||
|
||||
DST REG 21
|
||||
SRC REG 20
|
||||
|
||||
REGTOP 16
|
||||
LR_save REG 99
|
||||
LR_save2 REG 99
|
||||
GETBIT REG 99
|
||||
GETLENGTH REG 99
|
||||
LITERAL REG 99
|
||||
LOOP REG 99
|
||||
index REG 99
|
||||
bit_pos REG 99
|
||||
state REG 99
|
||||
prev_was_match REG 99
|
||||
offset REG 99
|
||||
prob reg 99
|
||||
byte REG 99
|
||||
PROBS reg 99
|
||||
tmp2 reg 2
|
||||
tmp1 REG 1
|
||||
tmp0 REG 0
|
||||
|
||||
REGMAP
|
||||
|
||||
upkr_probs equ $200
|
||||
|
||||
SIZEOF_PROBS EQU 1+255+1+2*32+2*32
|
||||
|
||||
unupkr::
|
||||
move LR,LR_save
|
||||
moveq #0,tmp0
|
||||
movei #upkr_probs,PROBS
|
||||
bset #7,tmp0
|
||||
movei #SIZEOF_PROBS,tmp2
|
||||
move PROBS,tmp1
|
||||
.init storeb tmp0,(tmp1)
|
||||
subq #1,tmp2
|
||||
jr pl,.init
|
||||
addq #1,tmp1
|
||||
|
||||
moveq #0,offset
|
||||
moveq #0,state
|
||||
movei #getlength,GETLENGTH
|
||||
movei #getbit,GETBIT
|
||||
.looppc move PC,LOOP
|
||||
addq #.loop-.looppc,LOOP
|
||||
move pc,LITERAL
|
||||
jr .start
|
||||
addq #6,LITERAL
|
||||
|
||||
.literal
|
||||
moveq #1,byte
|
||||
move pc,LR
|
||||
jr .into
|
||||
addq #6,LR ; LR = .getbit
|
||||
.getbit
|
||||
addc byte,byte
|
||||
.into
|
||||
btst #8,byte
|
||||
jump eq,(GETBIT)
|
||||
move byte,index
|
||||
|
||||
storeb byte,(DST)
|
||||
addq #1,DST
|
||||
.start
|
||||
moveq #0,prev_was_match
|
||||
|
||||
.loop
|
||||
moveq #0,index
|
||||
BL (GETBIT)
|
||||
jump cc,(LITERAL)
|
||||
addq #14,LR
|
||||
cmpq #1,prev_was_match
|
||||
jr eq,.newoff
|
||||
shlq #8,r0
|
||||
jump (GETBIT)
|
||||
move r0,index
|
||||
jr cc,.oldoff
|
||||
shlq #8,r0
|
||||
.newoff
|
||||
addq #1,r0 ; r0 = 257
|
||||
BL (GETLENGTH)
|
||||
subq #1,r0
|
||||
jump eq,(LR_save)
|
||||
move r0,offset
|
||||
|
||||
.oldoff
|
||||
movei #257+64,r0
|
||||
BL (GETLENGTH)
|
||||
|
||||
move DST,r1
|
||||
sub offset,r1
|
||||
.cpymatch1
|
||||
loadb (r1),r2
|
||||
subq #1,r0
|
||||
addqt #1,r1
|
||||
storeb r2,(DST)
|
||||
jr ne,.cpymatch1
|
||||
addq #1,DST
|
||||
|
||||
jump (LOOP)
|
||||
moveq #1,prev_was_match
|
||||
|
||||
getlength:
|
||||
move LR,LR_save2
|
||||
moveq #0,byte
|
||||
move r0,index
|
||||
moveq #0,bit_pos
|
||||
move pc,LR
|
||||
jump (GETBIT)
|
||||
addq #6,LR
|
||||
.gl
|
||||
jr cc,.exit
|
||||
addq #8,LR ; => return to "sh ..."
|
||||
jump (GETBIT)
|
||||
nop
|
||||
sh bit_pos,r0
|
||||
subq #1,bit_pos ; sh < 0 => shift left!
|
||||
or r0,byte
|
||||
jump (GETBIT)
|
||||
subq #8,LR
|
||||
.exit
|
||||
moveq #1,r0
|
||||
sh bit_pos,r0
|
||||
jump (LR_save2)
|
||||
or byte,r0
|
||||
|
||||
.newbyte:
|
||||
loadb (SRC),r2
|
||||
shlq #8,state
|
||||
addq #1,SRC
|
||||
or r2,state
|
||||
getbit
|
||||
move state,r2
|
||||
move PROBS,r1
|
||||
add index,r1 ; r1 = &probs[index]
|
||||
shrq #12,r2
|
||||
loadb (r1),prob
|
||||
jr eq,.newbyte
|
||||
move state,r2
|
||||
move state,r0
|
||||
shlq #24,r2
|
||||
shrq #8,r0 ; sh
|
||||
shrq #24,r2 ; sl
|
||||
cmp prob,r2
|
||||
addqt #1,index
|
||||
jr cs,.one
|
||||
mult prob,r0
|
||||
|
||||
;; state -= ((state >> 8) + 1)*prob
|
||||
;; prob -= (prob+8)>>4
|
||||
move prob,r2
|
||||
add prob,r0
|
||||
addq #8,r2
|
||||
sub r0,state
|
||||
shrq #4,r2
|
||||
moveq #0,r0
|
||||
jr .ret
|
||||
sub r2,prob
|
||||
|
||||
.one
|
||||
;; state = (state >> 8)*prob+(state & 0xff)
|
||||
;; prob += (256 + 8 - prob) >> 4
|
||||
move r2,state
|
||||
movei #256+8,r2
|
||||
add r0,state
|
||||
sub prob,r2 ; 256-prob+8
|
||||
shrq #4,r2
|
||||
add r2,prob
|
||||
|
||||
moveq #3,r0
|
||||
.ret
|
||||
storeb prob,(r1)
|
||||
jump (LR)
|
||||
shrq #1,r0 ; C = 0, r0 = 1
|
||||
217
asm_unpackers/unpack_jagrisc_fast.js
Normal file
217
asm_unpackers/unpack_jagrisc_fast.js
Normal file
@@ -0,0 +1,217 @@
|
||||
;;; -*-asm-*-
|
||||
;;; ukpr unpacker for Atari Jaguar RISC. (quick version)
|
||||
|
||||
;;; lyxass syntax
|
||||
|
||||
|
||||
; input:
|
||||
;;; R20 : packed buffer
|
||||
;;; R21 : output buffer
|
||||
;;; r30 : return address
|
||||
;;;
|
||||
;;; Register usage (destroyed!)
|
||||
;;; r0-r17,r20,r21
|
||||
;;;
|
||||
|
||||
DST REG 21
|
||||
SRC REG 20
|
||||
|
||||
REGTOP 17
|
||||
LR_save REG 99
|
||||
LR_save2 REG 99
|
||||
GETBIT REG 99
|
||||
GETLENGTH REG 99
|
||||
LITERAL REG 99
|
||||
LOOP REG 99
|
||||
index REG 99
|
||||
bit_pos REG 99
|
||||
state REG 99
|
||||
prev_was_match REG 99
|
||||
offset REG 99
|
||||
prob reg 99
|
||||
byte REG 99
|
||||
ndata reg 99
|
||||
PROBS reg 99
|
||||
tmp2 reg 2
|
||||
tmp1 REG 1
|
||||
tmp0 REG 0
|
||||
|
||||
REGMAP
|
||||
|
||||
upkr_probs equ $200
|
||||
|
||||
SIZEOF_PROBS EQU 1+255+1+2*32+2*32
|
||||
|
||||
unupkr::
|
||||
move LR,LR_save
|
||||
movei #$80808080,tmp0
|
||||
movei #upkr_probs,PROBS
|
||||
movei #SIZEOF_PROBS,tmp2
|
||||
move PROBS,tmp1
|
||||
.init store tmp0,(tmp1)
|
||||
subq #4,tmp2
|
||||
jr pl,.init
|
||||
addq #4,tmp1
|
||||
|
||||
loadb (SRC),ndata
|
||||
addq #1,SRC
|
||||
moveq #0,offset
|
||||
moveq #0,state
|
||||
movei #getlength,GETLENGTH
|
||||
movei #getbit,GETBIT
|
||||
.looppc move PC,LOOP
|
||||
addq #.loop-.looppc,LOOP
|
||||
move pc,LITERAL
|
||||
jr .start
|
||||
addq #6,LITERAL
|
||||
|
||||
.literal
|
||||
moveq #1,byte
|
||||
move pc,LR
|
||||
jr .into
|
||||
addq #6,LR ; LR = .getbit
|
||||
.getbit
|
||||
addc byte,byte
|
||||
.into
|
||||
btst #8,byte
|
||||
jump eq,(GETBIT)
|
||||
move byte,index
|
||||
|
||||
storeb byte,(DST)
|
||||
addq #1,DST
|
||||
.start
|
||||
moveq #0,prev_was_match
|
||||
|
||||
.loop
|
||||
moveq #0,index
|
||||
BL (GETBIT)
|
||||
jump cc,(LITERAL)
|
||||
addq #14,LR
|
||||
cmpq #1,prev_was_match
|
||||
jr eq,.newoff
|
||||
shlq #8,r0
|
||||
jump (GETBIT)
|
||||
move r0,index
|
||||
jr cc,.oldoff
|
||||
shlq #8,r0
|
||||
.newoff
|
||||
addq #1,r0 ; r0 = 257
|
||||
BL (GETLENGTH)
|
||||
subq #1,r0
|
||||
move r0,offset
|
||||
jump eq,(LR_save)
|
||||
nop
|
||||
.oldoff
|
||||
movei #257+64,r0
|
||||
BL (GETLENGTH)
|
||||
|
||||
move DST,r2
|
||||
move DST,r1
|
||||
or offset,r2
|
||||
btst #0,r2
|
||||
moveq #1,prev_was_match
|
||||
jr ne,.cpymatch1
|
||||
sub offset,r1
|
||||
.cpymatch2
|
||||
loadw (r1),r2
|
||||
addqt #2,r1
|
||||
subq #2,r0
|
||||
storew r2,(DST)
|
||||
jump eq,(LOOP)
|
||||
addqt #2,DST
|
||||
jr pl,.cpymatch2
|
||||
nop
|
||||
jump (LOOP)
|
||||
subq #1,DST
|
||||
|
||||
.cpymatch1
|
||||
loadb (r1),r2
|
||||
subq #1,r0
|
||||
addqt #1,r1
|
||||
storeb r2,(DST)
|
||||
jr ne,.cpymatch1
|
||||
addq #1,DST
|
||||
|
||||
jump (LOOP)
|
||||
//-> nop
|
||||
|
||||
getlength:
|
||||
move LR,LR_save2
|
||||
moveq #0,byte
|
||||
move r0,index
|
||||
moveq #0,bit_pos
|
||||
move pc,LR
|
||||
jump (GETBIT)
|
||||
addq #6,LR
|
||||
.gl
|
||||
jr cc,.exit
|
||||
addq #8,LR ; => return to "sh ..."
|
||||
jump (GETBIT)
|
||||
nop
|
||||
sh bit_pos,r0
|
||||
subq #1,bit_pos ; sh < 0 => shift left!
|
||||
or r0,byte
|
||||
jump (GETBIT)
|
||||
subq #8,LR
|
||||
.exit
|
||||
moveq #1,r0
|
||||
sh bit_pos,r0
|
||||
jump (LR_save2)
|
||||
or byte,r0
|
||||
|
||||
.newbyte:
|
||||
move ndata,r2
|
||||
shlq #8,state
|
||||
loadb (SRC),ndata
|
||||
or r2,state
|
||||
addq #1,SRC
|
||||
move state,r2
|
||||
shrq #12,r2
|
||||
jr ne,.done
|
||||
move state,r2
|
||||
jr .newbyte
|
||||
getbit
|
||||
move state,r2
|
||||
move PROBS,r1
|
||||
add index,r1 ; r1 = &probs[index]
|
||||
shrq #12,r2
|
||||
loadb (r1),prob
|
||||
jr eq,.newbyte
|
||||
move state,r2
|
||||
.done
|
||||
move state,r0
|
||||
shlq #24,r2
|
||||
shrq #8,r0 ; sh
|
||||
shrq #24,r2 ; sl
|
||||
cmp prob,r2
|
||||
addqt #1,index
|
||||
jr cs,.one
|
||||
mult prob,r0
|
||||
|
||||
;; state -= ((state >> 8) + 1)*prob
|
||||
;; prob -= (prob+8)>>4
|
||||
move prob,r2
|
||||
add prob,r0
|
||||
addq #8,r2
|
||||
sub r0,state
|
||||
shrq #4,r2
|
||||
moveq #0,r0
|
||||
sub r2,prob
|
||||
shrq #1,r0 ; C = 0, r0 = 0
|
||||
jump (LR)
|
||||
storeb prob,(r1)
|
||||
|
||||
.one
|
||||
;; state = (state >> 8)*prob+(state & 0xff)
|
||||
;; prob += (256 + 8 - prob) >> 4
|
||||
move r2,state
|
||||
movei #256+8,r2
|
||||
add r0,state
|
||||
sub prob,r2 ; 256-prob+8
|
||||
shrq #4,r2
|
||||
add r2,prob
|
||||
|
||||
moveq #3,r0
|
||||
storeb prob,(r1)
|
||||
jump (LR)
|
||||
shrq #1,r0 ; C = 0, r0 = 1
|
||||
2
c_library/.gitignore
vendored
Normal file
2
c_library/.gitignore
vendored
Normal file
@@ -0,0 +1,2 @@
|
||||
/target/
|
||||
/upkr
|
||||
127
c_library/Cargo.lock
generated
Normal file
127
c_library/Cargo.lock
generated
Normal file
@@ -0,0 +1,127 @@
|
||||
# This file is automatically @generated by Cargo.
|
||||
# It is not intended for manual editing.
|
||||
version = 3
|
||||
|
||||
[[package]]
|
||||
name = "anyhow"
|
||||
version = "1.0.69"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "224afbd727c3d6e4b90103ece64b8d1b67fbb1973b1046c2281eed3f3803f800"
|
||||
|
||||
[[package]]
|
||||
name = "autocfg"
|
||||
version = "1.1.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
|
||||
|
||||
[[package]]
|
||||
name = "cc"
|
||||
version = "1.0.79"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "50d30906286121d95be3d479533b458f87493b30a4b5f79a607db8f5d11aa91f"
|
||||
|
||||
[[package]]
|
||||
name = "cdivsufsort"
|
||||
version = "2.0.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "edefce019197609da416762da75bb000bbd2224b2d89a7e722c2296cbff79b8c"
|
||||
dependencies = [
|
||||
"cc",
|
||||
"sacabase",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "lexopt"
|
||||
version = "0.2.1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "478ee9e62aaeaf5b140bd4138753d1f109765488581444218d3ddda43234f3e8"
|
||||
|
||||
[[package]]
|
||||
name = "num-traits"
|
||||
version = "0.2.15"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "578ede34cf02f8924ab9447f50c28075b4d3e5b269972345e7e0372b38c6cdcd"
|
||||
dependencies = [
|
||||
"autocfg",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "proc-macro2"
|
||||
version = "1.0.51"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "5d727cae5b39d21da60fa540906919ad737832fe0b1c165da3a34d6548c849d6"
|
||||
dependencies = [
|
||||
"unicode-ident",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "quote"
|
||||
version = "1.0.23"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "8856d8364d252a14d474036ea1358d63c9e6965c8e5c1885c18f73d70bff9c7b"
|
||||
dependencies = [
|
||||
"proc-macro2",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "sacabase"
|
||||
version = "2.0.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "9883fc3d6ce3d78bb54d908602f8bc1f7b5f983afe601dabe083009d86267a84"
|
||||
dependencies = [
|
||||
"num-traits",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "syn"
|
||||
version = "1.0.109"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "72b64191b275b66ffe2469e8af2c1cfe3bafa67b529ead792a6d0160888b4237"
|
||||
dependencies = [
|
||||
"proc-macro2",
|
||||
"quote",
|
||||
"unicode-ident",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "thiserror"
|
||||
version = "1.0.39"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "a5ab016db510546d856297882807df8da66a16fb8c4101cb8b30054b0d5b2d9c"
|
||||
dependencies = [
|
||||
"thiserror-impl",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "thiserror-impl"
|
||||
version = "1.0.39"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "5420d42e90af0c38c3290abcca25b9b3bdf379fc9f55c528f53a269d9c9a267e"
|
||||
dependencies = [
|
||||
"proc-macro2",
|
||||
"quote",
|
||||
"syn",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "unicode-ident"
|
||||
version = "1.0.8"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "e5464a87b239f13a63a501f2701565754bae92d243d4bb7eb12f6d57d2269bf4"
|
||||
|
||||
[[package]]
|
||||
name = "upkr"
|
||||
version = "0.2.1"
|
||||
dependencies = [
|
||||
"anyhow",
|
||||
"cdivsufsort",
|
||||
"lexopt",
|
||||
"thiserror",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "upkr_c"
|
||||
version = "0.0.1"
|
||||
dependencies = [
|
||||
"upkr",
|
||||
]
|
||||
17
c_library/Cargo.toml
Normal file
17
c_library/Cargo.toml
Normal file
@@ -0,0 +1,17 @@
|
||||
[package]
|
||||
name = "upkr_c"
|
||||
version = "0.0.1"
|
||||
edition = "2021"
|
||||
|
||||
[lib]
|
||||
name = "upkr"
|
||||
crate-type = ["staticlib"]
|
||||
|
||||
[profile.release]
|
||||
opt-level = "s"
|
||||
strip = "debuginfo"
|
||||
lto = true
|
||||
panic = "abort"
|
||||
|
||||
[dependencies]
|
||||
upkr = { path="..", default-features=false }
|
||||
8
c_library/Makefile
Normal file
8
c_library/Makefile
Normal file
@@ -0,0 +1,8 @@
|
||||
upkr: upkr.c upkr.h target/release/libupkr.a
|
||||
gcc -O2 -Ltarget/release -o upkr upkr.c -lupkr -lm
|
||||
strip upkr
|
||||
|
||||
target/release/libupkr.a: cargo
|
||||
cargo build --release
|
||||
|
||||
.PHONY: cargo
|
||||
11
c_library/Readme.md
Normal file
11
c_library/Readme.md
Normal file
@@ -0,0 +1,11 @@
|
||||
This is a simple example of compiling upkr to a library that can be linked in a
|
||||
c program. It consists of a small rust crate which implements the c api and
|
||||
compiles to a static library and a matching c header file. As is, the rust
|
||||
crate offers two simple functions to compress/uncompress data with the default
|
||||
upkr config.
|
||||
|
||||
The provided makefile will only work on linux. Building the example upkr.c on
|
||||
other platforms is left as an exercise for the reader ;)
|
||||
|
||||
On Windows you might have to make sure to install and use the correct rust
|
||||
toolchain version (mingw vs. msvc) to match your c compiler.
|
||||
42
c_library/src/lib.rs
Normal file
42
c_library/src/lib.rs
Normal file
@@ -0,0 +1,42 @@
|
||||
use std::ffi::c_int;
|
||||
|
||||
// the upkr config to use, this can be modified to use other configs
|
||||
fn config() -> upkr::Config {
|
||||
upkr::Config::default()
|
||||
}
|
||||
|
||||
#[no_mangle]
|
||||
pub extern "C" fn upkr_compress(
|
||||
output_buffer: *mut u8,
|
||||
output_buffer_size: usize,
|
||||
input_buffer: *const u8,
|
||||
input_size: usize,
|
||||
compression_level: c_int,
|
||||
) -> usize {
|
||||
let output_buffer = unsafe { std::slice::from_raw_parts_mut(output_buffer, output_buffer_size) };
|
||||
let input_buffer = unsafe { std::slice::from_raw_parts(input_buffer, input_size) };
|
||||
|
||||
let packed_data = upkr::pack(input_buffer, compression_level.max(0).min(9) as u8, &config(), None);
|
||||
let copy_size = packed_data.len().min(output_buffer.len());
|
||||
output_buffer[..copy_size].copy_from_slice(&packed_data[..copy_size]);
|
||||
|
||||
packed_data.len()
|
||||
}
|
||||
|
||||
#[no_mangle]
|
||||
pub extern "C" fn upkr_uncompress(output_buffer: *mut u8, output_buffer_size: usize, input_buffer: *const u8, input_size: usize) -> isize {
|
||||
let output_buffer = unsafe { std::slice::from_raw_parts_mut(output_buffer, output_buffer_size)};
|
||||
let input_buffer = unsafe { std::slice::from_raw_parts(input_buffer, input_size)};
|
||||
|
||||
match upkr::unpack(input_buffer, &config(), output_buffer.len()) {
|
||||
Ok(unpacked_data) => {
|
||||
output_buffer[..unpacked_data.len()].copy_from_slice(&unpacked_data);
|
||||
unpacked_data.len() as isize
|
||||
}
|
||||
Err(upkr::UnpackError::OverSize { size, .. }) => size as isize,
|
||||
Err(other) => {
|
||||
eprintln!("[upkr] compressed data corrupt: {}", other);
|
||||
-1
|
||||
}
|
||||
}
|
||||
}
|
||||
99
c_library/upkr.c
Normal file
99
c_library/upkr.c
Normal file
@@ -0,0 +1,99 @@
|
||||
#include "upkr.h"
|
||||
#include <stdio.h>
|
||||
#include <string.h>
|
||||
#include <stdlib.h>
|
||||
|
||||
int main(int argc, char** argv) {
|
||||
if(argc < 2) {
|
||||
fprintf(stdout, "Usage:\n upkr [compress] [-0 .. -9] <file> [<out-file>]\n upkr [uncompress] <file> [<out-file>]\n");
|
||||
return 1;
|
||||
}
|
||||
|
||||
int argi = 1;
|
||||
int uncompress = 0;
|
||||
int compression_level = 4;
|
||||
if(strcmp(argv[argi], "compress") == 0) {
|
||||
++argi;
|
||||
} else if(strcmp(argv[argi], "uncompress") == 0) {
|
||||
uncompress = 1;
|
||||
++argi;
|
||||
}
|
||||
|
||||
if(argi < argc && argv[argi][0] == '-') {
|
||||
compression_level = atoi(argv[argi] + 1);
|
||||
++argi;
|
||||
}
|
||||
|
||||
if(argi == argc) {
|
||||
fprintf(stdout, "intput filename missing\n");
|
||||
return 1;
|
||||
}
|
||||
|
||||
const char* input_name = argv[argi++];
|
||||
char* output_name;
|
||||
if(argi < argc) {
|
||||
output_name = argv[argi];
|
||||
} else {
|
||||
output_name = malloc(strlen(input_name) + 5);
|
||||
strcpy(output_name, input_name);
|
||||
strcat(output_name, uncompress ? ".unp" : ".upk");
|
||||
}
|
||||
|
||||
FILE* file = fopen(input_name, "rb");
|
||||
if(file == 0) {
|
||||
fprintf(stdout, "failed to open input file '%s'\n", file);
|
||||
return 1;
|
||||
}
|
||||
fseek(file, 0, SEEK_END);
|
||||
long input_size = ftell(file);
|
||||
rewind(file);
|
||||
|
||||
char* input_buffer = (char*)malloc(input_size);
|
||||
long offset = 0;
|
||||
while(offset < input_size) {
|
||||
long read_size = fread(input_buffer + offset, 1, input_size - offset, file);
|
||||
if(read_size <= 0) {
|
||||
fprintf(stdout, "error reading input file\n");
|
||||
return 1;
|
||||
}
|
||||
offset += read_size;
|
||||
}
|
||||
fclose(file);
|
||||
|
||||
long output_buffer_size = input_size * 8;
|
||||
long output_size;
|
||||
char* output_buffer = (char*)malloc(output_buffer_size);
|
||||
for(;;) {
|
||||
if(uncompress) {
|
||||
output_size = upkr_uncompress(output_buffer, output_buffer_size, input_buffer, input_size);
|
||||
} else {
|
||||
output_size = upkr_compress(output_buffer, output_buffer_size, input_buffer, input_size, compression_level);
|
||||
}
|
||||
if(output_size < 0) {
|
||||
return 1;
|
||||
}
|
||||
if(output_size <= output_buffer_size) {
|
||||
break;
|
||||
}
|
||||
output_buffer = (char*)realloc(output_buffer, output_size);
|
||||
output_buffer_size = output_size;
|
||||
}
|
||||
|
||||
file = fopen(output_name, "wb");
|
||||
if(file == 0) {
|
||||
fprintf(stdout, "failed to open output file '%s'\n", output_name);
|
||||
return 1;
|
||||
}
|
||||
offset = 0;
|
||||
while(offset < output_size) {
|
||||
long written_size = fwrite(output_buffer + offset, 1, output_size - offset, file);
|
||||
if(written_size <= 0) {
|
||||
fprintf(stdout, "error writing output file\n");
|
||||
return 1;
|
||||
}
|
||||
offset += written_size;
|
||||
}
|
||||
fclose(file);
|
||||
|
||||
return 0;
|
||||
}
|
||||
25
c_library/upkr.h
Normal file
25
c_library/upkr.h
Normal file
@@ -0,0 +1,25 @@
|
||||
#ifndef UPKR_H_INCLUDED
|
||||
|
||||
#include <stddef.h>
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
// input_buffer/input_size: input data to compress
|
||||
// output_buffer/output_buffer_size: buffer to compress into
|
||||
// compression_level: 0-9
|
||||
// returns the size of the compressed data, even if it didn't fit into the output buffer
|
||||
size_t upkr_compress(void* output_buffer, size_t output_buffer_size, void* input_buffer, size_t input_size, int compression_level);
|
||||
|
||||
// input_buffer/input_size: compressed data
|
||||
// output_buffer/output_buffer_size: buffer to uncompress into
|
||||
// return value:
|
||||
// >= 0 : size of uncompressed data, even if it didn't fit into the output buffer
|
||||
// < 0 : input data corrupt, unable to decompress
|
||||
ptrdiff_t upkr_uncompress(void* output_buffer, size_t output_buffer_size, void* input_buffer, size_t input_size);
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
#endif
|
||||
@@ -1,3 +1,56 @@
|
||||
/*
|
||||
A simple C unpacker for upkr compressed data.
|
||||
|
||||
This implements two variants, selected by the UPKR_BITSTREAM define:
|
||||
- normal: faster and smaller on modern hardware as whole bytes are shifted into
|
||||
the rANS state at a time, but requires 20bits for the state
|
||||
- bitstream: only single bits are shifted into the rANS state at a time
|
||||
which allows the state to always fit in 16bits which is a boon
|
||||
on very old CPUs.
|
||||
The encoder and decoder need to be configured to use the same varianet.
|
||||
|
||||
upkr compressed data is a rANS byte-/bit-stream encoding a series of literal
|
||||
byte values and back-references as probability encoded bits.
|
||||
|
||||
upkr_decode_bit reads one bit from the rANS stream, taking a probability context
|
||||
as parameter. The probability context is a byte estimating the probability of
|
||||
a bit encoded in this context being set. It is updated by upkr_decode_bit
|
||||
after each decoded bit to reflect the observed past frequencies of on/off bits.
|
||||
|
||||
There are a number of different contexts used in the compressed format. The order in the
|
||||
upkr_probs array is arbitrary, the only requirement for the unpacker is that all bits
|
||||
that shared the same context while encoding also share the same context while decoding.
|
||||
The contexts are:
|
||||
- is match
|
||||
- has offset
|
||||
- literal bit N (0-7) with already decoded highest bits of literal == M (255 total)
|
||||
- offset bit N (one less than max offset bits)
|
||||
- has offset bit N (max offset bits)
|
||||
- length bit N (one less then max length bits)
|
||||
- has length bit N (max length bits)
|
||||
|
||||
Literal bytes are encoded from highest to lowest bit, with the bit position and
|
||||
the already decoded bits as context.
|
||||
|
||||
Offst and Length are encoded in an interlaced variant of elias gamma coding. They
|
||||
are encoded from lowest to highest bits. For each bit, first one bit is read in the
|
||||
"has offset/length bit N)". If this is set, offset/length bit N is read in it's context
|
||||
and the decoding continues with the next bit. If the "has bit N" is read as false, a
|
||||
fixed 1 bit is added as the top bit at this position.
|
||||
|
||||
The highlevel decode loop then looks like this:
|
||||
loop:
|
||||
if read_bit(IS_MATCH):
|
||||
if prev_was_match || read_bit(HAS_OFFSET):
|
||||
offset = read_length_or_offset(OFFSET) - 1
|
||||
if offset == 0:
|
||||
break
|
||||
length = read_length_or_offset(LENGTH)
|
||||
copy_bytes_from_offset(length, offset)
|
||||
else:
|
||||
read_and_push(literal)
|
||||
*/
|
||||
|
||||
typedef unsigned char u8;
|
||||
typedef unsigned short u16;
|
||||
typedef unsigned long u32;
|
||||
@@ -14,6 +67,7 @@ u32 upkr_state;
|
||||
|
||||
int upkr_decode_bit(int context_index) {
|
||||
#ifdef UPKR_BITSTREAM
|
||||
// shift in single bits until rANS state is >= 32768
|
||||
while(upkr_state < 32768) {
|
||||
if(upkr_bits_left == 0) {
|
||||
upkr_current_byte = *upkr_data_ptr++;
|
||||
@@ -24,6 +78,7 @@ int upkr_decode_bit(int context_index) {
|
||||
--upkr_bits_left;
|
||||
}
|
||||
#else
|
||||
// shift in a full byte until rANS state is >= 4096
|
||||
while(upkr_state < 4096) {
|
||||
upkr_state = (upkr_state << 8) | *upkr_data_ptr++;
|
||||
}
|
||||
@@ -32,6 +87,8 @@ int upkr_decode_bit(int context_index) {
|
||||
int prob = upkr_probs[context_index];
|
||||
int bit = (upkr_state & 255) < prob ? 1 : 0;
|
||||
|
||||
// rANS state and context probability update
|
||||
// for the later, add 1/16th (rounded) of difference from either 0 or 256
|
||||
if(bit) {
|
||||
upkr_state = prob * (upkr_state >> 8) + (upkr_state & 255);
|
||||
prob += (256 - prob + 8) >> 4;
|
||||
@@ -60,6 +117,7 @@ void* upkr_unpack(void* destination, void* compressed_data) {
|
||||
#ifdef UPKR_BITSTREAM
|
||||
upkr_bits_left = 0;
|
||||
#endif
|
||||
// all contexts are initialized to 128 = equal probability of 0 and 1
|
||||
for(int i = 0; i < sizeof(upkr_probs); ++i)
|
||||
upkr_probs[i] = 128;
|
||||
|
||||
@@ -68,10 +126,13 @@ void* upkr_unpack(void* destination, void* compressed_data) {
|
||||
int prev_was_match = 0;
|
||||
int offset = 0;
|
||||
for(;;) {
|
||||
// is match
|
||||
if(upkr_decode_bit(0)) {
|
||||
// has offset
|
||||
if(prev_was_match || upkr_decode_bit(256)) {
|
||||
offset = upkr_decode_length(257) - 1;
|
||||
if(offset == 0) {
|
||||
// a 0 offset signals the end of the compressed data
|
||||
break;
|
||||
}
|
||||
}
|
||||
@@ -82,6 +143,9 @@ void* upkr_unpack(void* destination, void* compressed_data) {
|
||||
}
|
||||
prev_was_match = 1;
|
||||
} else {
|
||||
// byte contains the previously read bits and indicates the number of
|
||||
// read bits by the set top bit. Therefore it can be directly used as the
|
||||
// context index. The set top bit ends up at bit position 8 and is not stored.
|
||||
int byte = 1;
|
||||
while(byte < 256) {
|
||||
int bit = upkr_decode_bit(byte);
|
||||
|
||||
13
dos_unpacker/readme.txt
Normal file
13
dos_unpacker/readme.txt
Normal file
@@ -0,0 +1,13 @@
|
||||
16 bit DOS executable stubs
|
||||
---------------------------
|
||||
|
||||
by pestis and TomCat
|
||||
|
||||
unpack_x86_16_DOS.asm:
|
||||
maximum compatibility, relocates unpacked code to normal start address
|
||||
unpack_x86_16_DOS_no_relocation.asm:
|
||||
saves some bytes by not relocating, unpacked code needs to be assembled to
|
||||
start at 0x3FFE
|
||||
unpack_x86_16_DOS_no_repeated_offset.asm:
|
||||
removes support for repeated offsets, potentially at the cost of some compression ratio.
|
||||
most likely only a win in very narrow circumstances around the 1kb mark
|
||||
160
dos_unpacker/unpack_x86_16_DOS.asm
Normal file
160
dos_unpacker/unpack_x86_16_DOS.asm
Normal file
@@ -0,0 +1,160 @@
|
||||
; Contributions from pestis, TomCat and exoticorn
|
||||
;
|
||||
; This is the 16-bit DOS x86 decompression stub for upkr, which is designed for
|
||||
; maximum compatibility: it relocates the compressed data so it can be
|
||||
; decompressed starting at the normal .COM starting address. In other words,
|
||||
; many of the already existing .COM files should be compressable using this
|
||||
; stub.
|
||||
;
|
||||
; How to use:
|
||||
; 1) Pack your intro using upkr into data.bin with the --x86 command line
|
||||
; argument:
|
||||
;
|
||||
; $ upkr --x86 intro.com data.bin
|
||||
;
|
||||
; 2) Compile this .asm file using nasm (or any compatible assembler):
|
||||
;
|
||||
; $ nasm unpack_x86_16_DOS.asm -fbin -o intropck.com
|
||||
;
|
||||
; The packed size of the intro+stub is limited by max_len (see below) bytes.
|
||||
;
|
||||
; In specific cases, the unpacker stub can be further optimized to save a byte
|
||||
; or two:
|
||||
; 1) You can remove CLC before RET, if you don't mind carry being set upon
|
||||
; program entry
|
||||
; 2) You can also move PUSHA before PUSH SI and put POPA as the first
|
||||
; operation of the compressed code.
|
||||
max_len equ 16384
|
||||
prog_start equ (0x100+max_len+510+relocation-upkr_unpack)
|
||||
probs equ (((prog_start+max_len+510)+255)/256)*256
|
||||
|
||||
org 0x100
|
||||
|
||||
; This is will be loaded at 0x100, but relocates the code and data to prog_start
|
||||
relocation:
|
||||
push si ; si = 0x100 at DOS start, so save it for later ret
|
||||
pusha ; pusha to recall all registers before starting intro
|
||||
push si ; for pop di to start writing the output
|
||||
mov di, prog_start ; the depacker & data are relocated from 0x100 to prog_start
|
||||
mov ch, max_len/512
|
||||
rep movsw
|
||||
jmp si ; jump to relocated upkr_unpack
|
||||
|
||||
|
||||
; upkr_unpack unpacks the code to 0x100 and runs it when done.
|
||||
upkr_unpack:
|
||||
xchg ax, bp ; position in input bitstream (bp) = 0
|
||||
cwd ; upkr_state (dx) = 0;
|
||||
xchg ax, cx ; cx = 0x9XX
|
||||
mov al, 128 ; for(int i = 0; i < sizeof(upkr_probs); ++i) upkr_probs[i] = 128;
|
||||
rep stosb
|
||||
pop di ; u8* write_ptr = (u8*)destination;
|
||||
.mainloop:
|
||||
mov bx, probs
|
||||
call upkr_decode_bit
|
||||
jc .else ; if(upkr_decode_bit(0)) {
|
||||
mov bh, (probs+256)/256
|
||||
jcxz .skip_call
|
||||
call upkr_decode_bit
|
||||
jc .skipoffset
|
||||
.skip_call:
|
||||
stc
|
||||
call upkr_decode_number ; offset = upkr_decode_length(258) - 1;
|
||||
loop .notdone ; if(offset == 0)
|
||||
popa
|
||||
clc
|
||||
ret
|
||||
.notdone:
|
||||
mov si, di
|
||||
.sub:
|
||||
dec si
|
||||
loop .sub
|
||||
.skipoffset:
|
||||
mov bl, 128 ; int length = upkr_decode_length(384);
|
||||
call upkr_decode_number
|
||||
rep movsb ; *write_ptr = write_ptr[-offset];
|
||||
jmp .mainloop
|
||||
.byteloop:
|
||||
call upkr_decode_bit ; int bit = upkr_decode_bit(byte);
|
||||
.else:
|
||||
adc bl, bl ; byte = (byte << 1) + bit;
|
||||
jnc .byteloop
|
||||
xchg ax, bx
|
||||
stosb
|
||||
inc si
|
||||
mov cl, 1
|
||||
jmp .mainloop ; prev_was_match = 0;
|
||||
|
||||
|
||||
; upkr_decode_bit decodes one bit from the rANS entropy encoded bit stream.
|
||||
; parameters:
|
||||
; bx = memory address of the context probability
|
||||
; dx = decoder state
|
||||
; bp = bit position in input stream
|
||||
; returns:
|
||||
; dx = new decoder state
|
||||
; bp = new bit position in input stream
|
||||
; carry = bit
|
||||
; trashes ax
|
||||
upkr_load_bit:
|
||||
bt [compressed_data-relocation+prog_start], bp
|
||||
inc bp
|
||||
adc dx, dx
|
||||
upkr_decode_bit:
|
||||
inc dx ; inc dx, dec dx is used to test the top (sign) bit of dx
|
||||
dec dx
|
||||
jns upkr_load_bit
|
||||
movzx ax, byte [bx] ; u16 prob = upkr_probs[context_index]
|
||||
neg byte [bx]
|
||||
push ax ; save prob, tmp = prob
|
||||
cmp dl, al ; int bit = (upkr_state & 255) < prob ? 1 : 0; (carry = bit)
|
||||
pushf ; save bit flags
|
||||
jc .bit ; (skip if bit)
|
||||
xchg [bx], al ; tmp = 256 - tmp;
|
||||
.bit:
|
||||
shr byte [bx], 4 ; upkr_probs[context_index] = tmp + (256 - tmp + 8) >> 4;
|
||||
adc [bx], al
|
||||
mul dh ; upkr_state = tmp * (upkr_state >> 8) + (upkr_state & 255);
|
||||
mov dh, 0
|
||||
add dx, ax
|
||||
popf
|
||||
pop ax
|
||||
jc .bit2 ; (skip if bit)
|
||||
neg byte [bx] ; tmp = 256 - tmp;
|
||||
sub dx, ax ; upkr_state -= prob; note that this will also leave carry always unset, which is what we want
|
||||
.bit2:
|
||||
ret ; return the bit in carry
|
||||
|
||||
|
||||
; upkr_decode_number loads a variable length encoded number (up to 16 bits) from
|
||||
; the compressed stream. Only numbers 1..65535 can be encoded. If the encoded
|
||||
; number has 4 bits and is 1ABC, it is encoded using a kind of an "interleaved
|
||||
; elias code": 0A0B0C1. The 1 in the end implies that no more bits are coming.
|
||||
; parameters:
|
||||
; cx = must be 0
|
||||
; bx = memory address of the context probability
|
||||
; dx = decoder state
|
||||
; bp = bit position in input stream
|
||||
; carry = must be 1
|
||||
; returns:
|
||||
; cx = length
|
||||
; dx = new decoder state
|
||||
; bp = new bit position in input stream
|
||||
; carry = 1
|
||||
; trashes bl, ax
|
||||
upkr_decode_number_loop:
|
||||
inc bx
|
||||
call upkr_decode_bit
|
||||
upkr_decode_number:
|
||||
rcr cx, 1
|
||||
inc bx
|
||||
call upkr_decode_bit
|
||||
jnc upkr_decode_number_loop ; 0 = there's more bits coming, 1 = no more bits
|
||||
.loop2:
|
||||
rcr cx, 1
|
||||
jnc .loop2
|
||||
ret
|
||||
|
||||
|
||||
compressed_data:
|
||||
incbin "data.bin"
|
||||
151
dos_unpacker/unpack_x86_16_DOS_no_relocation.asm
Normal file
151
dos_unpacker/unpack_x86_16_DOS_no_relocation.asm
Normal file
@@ -0,0 +1,151 @@
|
||||
; Contributions from pestis, TomCat and exoticorn
|
||||
;
|
||||
; This is the 16-bit DOS x86 decompression stub for upkr, which decompresses the
|
||||
; code starting at address 0x3FFE (or whatever is defined by the entrypoint
|
||||
; below). Thus, the packed code needs to be assembled with org 0x3FFE to work.
|
||||
;
|
||||
; How to use:
|
||||
; 1) Put POPA as the first instruction of your compiled code and use org
|
||||
; 0x3FFE
|
||||
; 2) Pack your intro using upkr into data.bin with the --x86 command line
|
||||
; argument:
|
||||
;
|
||||
; $ upkr --x86 intro.com data.bin
|
||||
;
|
||||
; 2) Compile this .asm file using nasm (or any compatible assembler) e.g.
|
||||
;
|
||||
; $ nasm unpack_x86_16_DOS_no_relocation.asm -fbin -o intropck.com
|
||||
;
|
||||
; In specific cases, the unpacker stub can be further optimized to save a byte
|
||||
; or two:
|
||||
; 1) If your stub+compressed code is 2k or smaller, you can save 1 byte by
|
||||
; putting probs at 0x900 and initializing DI with SALC; XCHG AX, DI instead
|
||||
; of MOV DI, probs
|
||||
; 2) If you remove the PUSHA (and POPA in the compressed code), then you can
|
||||
; assume the registers as follows: AX = 0x00XX, BX = probs + 0x1XX, CX = 0
|
||||
; DX = (trash), SI = DI = right after your program, SP = as it was when the
|
||||
; program started, flags = carry set
|
||||
;
|
||||
; Note that even with the PUSHA / POPA, carry will be set (!) unlike normal dos
|
||||
; program.
|
||||
entry equ 0x3FFE
|
||||
probs equ entry - 0x1FE ; must be aligned to 256
|
||||
|
||||
org 0x100
|
||||
|
||||
|
||||
; This is will be loaded at 0x100, but relocates the code and data to prog_start
|
||||
upkr_unpack:
|
||||
pusha
|
||||
xchg ax, bp ; position in bitstream = 0
|
||||
cwd ; upkr_state = 0;
|
||||
mov di, probs
|
||||
mov ax, 0x8080 ; for(int i = 0; i < sizeof(upkr_probs); ++i) upkr_probs[i] = 128;
|
||||
rep stosw
|
||||
push di
|
||||
.mainloop:
|
||||
mov bx, probs
|
||||
call upkr_decode_bit
|
||||
jc .else ; if(upkr_decode_bit(0)) {
|
||||
mov bh, (probs+256)/256
|
||||
jcxz .skip_call ; if(prev_was_match || upkr_decode_bit(257)) {
|
||||
call upkr_decode_bit
|
||||
jc .skipoffset
|
||||
.skip_call:
|
||||
stc
|
||||
call upkr_decode_number ; offset = upkr_decode_number(258) - 1;
|
||||
mov si, di
|
||||
loop .sub ; if(offset == 0)
|
||||
ret
|
||||
.sub:
|
||||
dec si
|
||||
loop .sub
|
||||
.skipoffset:
|
||||
mov bl, 128 ; int length = upkr_decode_number(384);
|
||||
call upkr_decode_number
|
||||
rep movsb ; *write_ptr = write_ptr[-offset];
|
||||
jmp .mainloop
|
||||
.byteloop:
|
||||
call upkr_decode_bit ; int bit = upkr_decode_bit(byte);
|
||||
.else:
|
||||
adc bl, bl ; byte = (byte << 1) + bit;
|
||||
jnc .byteloop
|
||||
xchg ax, bx
|
||||
stosb
|
||||
inc si
|
||||
mov cl, 1
|
||||
jmp .mainloop ; prev_was_match = 0;
|
||||
|
||||
|
||||
; upkr_decode_bit decodes one bit from the rANS entropy encoded bit stream.
|
||||
; parameters:
|
||||
; bx = memory address of the context probability
|
||||
; dx = decoder state
|
||||
; bp = bit position in input stream
|
||||
; returns:
|
||||
; dx = new decoder state
|
||||
; bp = new bit position in input stream
|
||||
; carry = bit
|
||||
; trashes ax
|
||||
upkr_load_bit:
|
||||
bt [compressed_data], bp
|
||||
inc bp
|
||||
adc dx, dx
|
||||
upkr_decode_bit:
|
||||
inc dx
|
||||
dec dx ; inc dx, dec dx is used to test the top (sign) bit of dx
|
||||
jns upkr_load_bit
|
||||
movzx ax, byte [bx] ; u16 prob = upkr_probs[context_index]
|
||||
neg byte [bx]
|
||||
push ax ; save prob, tmp = prob
|
||||
cmp dl, al ; int bit = (upkr_state & 255) < prob ? 1 : 0; (carry = bit)
|
||||
pushf ; save bit flags
|
||||
jc .bit ; (skip if bit)
|
||||
xchg [bx], al ; tmp = 256 - tmp;
|
||||
.bit:
|
||||
shr byte [bx], 4 ; upkr_probs[context_index] = tmp + (256 - tmp + 8) >> 4;
|
||||
adc [bx], al
|
||||
mul dh ; upkr_state = tmp * (upkr_state >> 8) + (upkr_state & 255);
|
||||
mov dh, 0
|
||||
add dx, ax
|
||||
popf
|
||||
pop ax
|
||||
jc .bit2 ; (skip if bit)
|
||||
neg byte [bx] ; tmp = 256 - tmp;
|
||||
sub dx, ax ; upkr_state -= prob; note that this will also leave carry always unset, which is what we want
|
||||
.bit2:
|
||||
ret ; flags = bit
|
||||
|
||||
|
||||
; upkr_decode_number loads a variable length encoded number (up to 16 bits) from
|
||||
; the compressed stream. Only numbers 1..65535 can be encoded. If the encoded
|
||||
; number has 4 bits and is 1ABC, it is encoded using a kind of an "interleaved
|
||||
; elias code": 0A0B0C1. The 1 in the end implies that no more bits are coming.
|
||||
; parameters:
|
||||
; cx = must be 0
|
||||
; bx = memory address of the context probability
|
||||
; dx = decoder state
|
||||
; bp = bit position in input stream
|
||||
; carry = must be 1
|
||||
; returns:
|
||||
; cx = length
|
||||
; dx = new decoder state
|
||||
; bp = new bit position in input stream
|
||||
; carry = 1
|
||||
; trashes bl, ax
|
||||
upkr_decode_number_loop:
|
||||
inc bx
|
||||
call upkr_decode_bit
|
||||
upkr_decode_number:
|
||||
rcr cx, 1
|
||||
inc bx
|
||||
call upkr_decode_bit
|
||||
jnc upkr_decode_number_loop ; while(upkr_decode_bit(context_index)) {
|
||||
.loop2:
|
||||
rcr cx, 1
|
||||
jnc .loop2
|
||||
ret
|
||||
|
||||
|
||||
compressed_data:
|
||||
incbin "data.bin"
|
||||
154
dos_unpacker/unpack_x86_16_DOS_no_repeated_offset.asm
Normal file
154
dos_unpacker/unpack_x86_16_DOS_no_repeated_offset.asm
Normal file
@@ -0,0 +1,154 @@
|
||||
; Contributions from pestis, TomCat and exoticorn
|
||||
;
|
||||
; This is the 16-bit DOS x86 decompression stub for upkr, which is designed for
|
||||
; the --no-repeated-offsets option of upkr. The decompression stub is slightly
|
||||
; smaller, but the compressed data might be bigger, so you have to test if
|
||||
; --no-repeated-offsets pays off in the end. This stub relocates the compressed
|
||||
; data so it can be decompressed starting at the normal .COM starting address.
|
||||
;
|
||||
; How to use:
|
||||
; 1) Pack your intro using upkr into data.bin with the --x86b command line
|
||||
; argument: (notice the --x86b, not --x86!)
|
||||
;
|
||||
; $ upkr --x86b intro.com data.bin
|
||||
;
|
||||
; 2) Compile this .asm file using nasm (or any compatible assembler):
|
||||
;
|
||||
; $ nasm unpack_x86_16_DOS_no_repeated_offsets.asm -fbin -o intropck.com
|
||||
;
|
||||
; The packed size of the intro+stub is limited by max_len (see below) bytes.
|
||||
;
|
||||
; In specific cases, the unpacker stub can be further optimized to save a byte
|
||||
; or two:
|
||||
; 1) You can remove CLC before RET, if you don't mind carry being set upon
|
||||
; program entry
|
||||
; 2) You can also move PUSHA before PUSH SI and put POPA as the first
|
||||
; operation of the compressed code.
|
||||
max_len equ 16384
|
||||
prog_start equ (0x100+max_len+510+relocation-upkr_unpack)
|
||||
probs equ (((prog_start+max_len+510)+255)/256)*256
|
||||
|
||||
org 0x100
|
||||
|
||||
|
||||
; This is will be loaded at 0x100, but relocates the code and data to prog_start
|
||||
relocation:
|
||||
push si ; si = 0x100 at DOS start, so save it for later ret
|
||||
pusha ; pusha to recall all registers before starting intro
|
||||
push si ; for pop di to start writing the output
|
||||
mov di, prog_start ; the depacker & data are relocated from 0x100 to prog_start
|
||||
mov ch, max_len/512
|
||||
rep movsw
|
||||
jmp si ; jump to relocated upkr_unpack
|
||||
|
||||
|
||||
; upkr_unpack unpacks the code to 0x100 and runs it when done.
|
||||
upkr_unpack:
|
||||
xchg ax, bp ; position in bitstream = 0
|
||||
cwd ; upkr_state = 0;
|
||||
xchg cx, ax ; cx > 0x0200
|
||||
mov al, 128 ; for(int i = 0; i < sizeof(upkr_probs); ++i) upkr_probs[i] = 128;
|
||||
rep stosb
|
||||
pop di ; u8* write_ptr = (u8*)destination;
|
||||
.mainloop:
|
||||
mov bx, probs
|
||||
call upkr_decode_bit
|
||||
jnc .else ; if(upkr_decode_bit(0)) {
|
||||
inc bh
|
||||
call upkr_decode_number ; offset = upkr_decode_number(258) - 1;
|
||||
loop .notdone ; if(offset == 0)
|
||||
popa
|
||||
clc
|
||||
ret
|
||||
.notdone:
|
||||
mov si, di
|
||||
.sub:
|
||||
dec si
|
||||
loop .sub
|
||||
mov bl, 128 ; int length = upkr_decode_number(384);
|
||||
call upkr_decode_number
|
||||
rep movsb ; *write_ptr = write_ptr[-offset];
|
||||
jmp .mainloop
|
||||
.else:
|
||||
inc bx
|
||||
.byteloop:
|
||||
call upkr_decode_bit ; int bit = upkr_decode_bit(byte);
|
||||
adc bl, bl ; byte = (byte << 1) + bit;
|
||||
jnc .byteloop
|
||||
xchg ax, bx
|
||||
stosb
|
||||
jmp .mainloop ; prev_was_match = 0;
|
||||
|
||||
|
||||
; upkr_decode_bit decodes one bit from the rANS entropy encoded bit stream.
|
||||
; parameters:
|
||||
; bx = memory address of the context probability
|
||||
; dx = decoder state
|
||||
; bp = bit position in input stream
|
||||
; returns:
|
||||
; dx = new decoder state
|
||||
; bp = new bit position in input stream
|
||||
; carry = bit
|
||||
; trashes ax
|
||||
upkr_load_bit:
|
||||
bt [compressed_data-relocation+prog_start], bp
|
||||
inc bp
|
||||
adc dx, dx
|
||||
upkr_decode_bit:
|
||||
inc dx
|
||||
dec dx ; or whatever other test for the top bit there is
|
||||
jns upkr_load_bit
|
||||
movzx ax, byte [bx] ; u16 prob = upkr_probs[context_index]
|
||||
neg byte [bx]
|
||||
push ax ; save prob, tmp = prob
|
||||
cmp dl, al ; int bit = (upkr_state & 255) < prob ? 1 : 0; (carry = bit)
|
||||
pushf ; save bit flags
|
||||
jc .bit ; (skip if bit)
|
||||
xchg [bx], al ; tmp = 256 - tmp;
|
||||
.bit:
|
||||
shr byte [bx], 4 ; upkr_probs[context_index] = tmp + (256 - tmp + 8) >> 4;
|
||||
adc [bx], al ; upkr_probs[context_index] = tmp;
|
||||
mul dh ; upkr_state = tmp * (upkr_state >> 8) + (upkr_state & 255);
|
||||
mov dh, 0
|
||||
add dx, ax
|
||||
popf
|
||||
pop ax
|
||||
jc .bit2 ; (skip if bit)
|
||||
neg byte [bx] ; tmp = 256 - tmp;
|
||||
sub dx, ax ; upkr_state -= prob; note that this will also leave carry always unset, which is what we want
|
||||
.bit2:
|
||||
ret ; flags = bit
|
||||
|
||||
|
||||
; upkr_decode_number loads a variable length encoded number (up to 16 bits) from
|
||||
; the compressed stream. Only numbers 1..65535 can be encoded. If the encoded
|
||||
; number has 4 bits and is 1ABC, it is encoded using a kind of an "interleaved
|
||||
; elias code": 0A0B0C1. The 1 in the end implies that no more bits are coming.
|
||||
; parameters:
|
||||
; cx = must be 0
|
||||
; bx = memory address of the context probability
|
||||
; dx = decoder state
|
||||
; bp = bit position in input stream
|
||||
; carry = must be 1
|
||||
; returns:
|
||||
; cx = length
|
||||
; dx = new decoder state
|
||||
; bp = new bit position in input stream
|
||||
; carry = 1
|
||||
; trashes bl, ax
|
||||
upkr_decode_number_loop:
|
||||
inc bx
|
||||
call upkr_decode_bit
|
||||
upkr_decode_number:
|
||||
rcr cx, 1
|
||||
inc bx
|
||||
call upkr_decode_bit
|
||||
jnc upkr_decode_number_loop ; 0 = there's more bits coming, 1 = no more bits
|
||||
.loop2:
|
||||
rcr cx, 1
|
||||
jnc .loop2
|
||||
ret
|
||||
|
||||
|
||||
compressed_data:
|
||||
incbin "data.bin"
|
||||
1
release/.gitignore
vendored
1
release/.gitignore
vendored
@@ -2,3 +2,4 @@
|
||||
*.tgz
|
||||
upkr-linux/
|
||||
upkr-windows/
|
||||
upkr-windows-32/
|
||||
|
||||
@@ -1,11 +1,12 @@
|
||||
VERSION := $(shell cargo run --release -- --version)
|
||||
|
||||
all: clean upkr-linux-$(VERSION).tgz upkr-windows-$(VERSION).zip
|
||||
all: clean upkr-linux-$(VERSION).tgz upkr-windows-$(VERSION).zip upkr-windows-32-$(VERSION).zip
|
||||
|
||||
clean:
|
||||
rm -rf upkr-linux
|
||||
rm -f upkr-linux*.tgz
|
||||
rm -rf upkr-windows
|
||||
rm -rf upkr-windows-32
|
||||
rm -f upkr-windows*.zip
|
||||
|
||||
upkr-linux-$(VERSION).tgz: upkr-linux/upkr PHONY
|
||||
@@ -22,14 +23,29 @@ upkr-windows-$(VERSION).zip: upkr-windows/upkr.exe PHONY
|
||||
cd .. && git archive HEAD asm_unpackers | tar -xC release/upkr-windows
|
||||
zip -r -9 $@ upkr-windows
|
||||
|
||||
upkr-windows-32-$(VERSION).zip: upkr-windows-32/upkr.exe PHONY
|
||||
cp ../README.md upkr-windows-32/
|
||||
cd .. && git archive HEAD c_unpacker | tar -xC release/upkr-windows-32
|
||||
cd .. && git archive HEAD z80_unpacker | tar -xC release/upkr-windows-32
|
||||
cd .. && git archive HEAD asm_unpackers | tar -xC release/upkr-windows-32
|
||||
zip -r -9 $@ upkr-windows-32
|
||||
|
||||
upkr-linux/upkr:
|
||||
cargo build --target x86_64-unknown-linux-musl --release
|
||||
cargo build --target x86_64-unknown-linux-musl --release -F terminal
|
||||
mkdir -p upkr-linux
|
||||
cp ../target/x86_64-unknown-linux-musl/release/upkr upkr-linux/
|
||||
strip upkr-linux/upkr
|
||||
|
||||
upkr-windows/upkr.exe:
|
||||
cargo build --target x86_64-pc-windows-gnu --release
|
||||
cargo build --target x86_64-pc-windows-gnu --release -F terminal
|
||||
mkdir -p upkr-windows
|
||||
cp ../target/x86_64-pc-windows-gnu/release/upkr.exe upkr-windows/
|
||||
x86_64-w64-mingw32-strip upkr-windows/upkr.exe
|
||||
|
||||
upkr-windows-32/upkr.exe:
|
||||
cargo build --target i686-pc-windows-gnu --release -F terminal
|
||||
mkdir -p upkr-windows-32
|
||||
cp ../target/i686-pc-windows-gnu/release/upkr.exe upkr-windows-32/
|
||||
i686-w64-mingw32-strip upkr-windows-32/upkr.exe
|
||||
|
||||
PHONY:
|
||||
PHONY:
|
||||
|
||||
208
src/heatmap.rs
Normal file
208
src/heatmap.rs
Normal file
@@ -0,0 +1,208 @@
|
||||
/// Heatmap information about a compressed block of data.
|
||||
///
|
||||
/// For each byte in the uncompressed data, the heatmap provides two pieces of intormation:
|
||||
/// 1. whether this byte was encoded as a literal or as part of a match
|
||||
/// 2. how many (fractional) bits where spend on encoding this byte
|
||||
///
|
||||
/// For the sake of the heatmap, the cost of literals are spread out across all matches
|
||||
/// that reference the literal.
|
||||
///
|
||||
/// If the `terminal` feature is enabled, there is a function to write out the
|
||||
/// heatmap as a colored hexdump.
|
||||
pub struct Heatmap {
|
||||
data: Vec<u8>,
|
||||
cost: Vec<f32>,
|
||||
raw_cost: Vec<f32>,
|
||||
literal_index: Vec<usize>,
|
||||
}
|
||||
|
||||
impl Heatmap {
|
||||
pub(crate) fn new() -> Heatmap {
|
||||
Heatmap {
|
||||
data: Vec::new(),
|
||||
cost: Vec::new(),
|
||||
raw_cost: Vec::new(),
|
||||
literal_index: Vec::new(),
|
||||
}
|
||||
}
|
||||
|
||||
pub(crate) fn add_literal(&mut self, byte: u8, cost: f32) {
|
||||
self.data.push(byte);
|
||||
self.cost.push(cost);
|
||||
self.literal_index.push(self.literal_index.len());
|
||||
}
|
||||
|
||||
pub(crate) fn add_match(&mut self, offset: usize, length: usize, mut cost: f32) {
|
||||
cost /= length as f32;
|
||||
for _ in 0..length {
|
||||
self.data.push(self.data[self.data.len() - offset]);
|
||||
self.literal_index
|
||||
.push(self.literal_index[self.literal_index.len() - offset]);
|
||||
self.cost.push(cost);
|
||||
}
|
||||
}
|
||||
|
||||
pub(crate) fn finish(&mut self) {
|
||||
self.raw_cost = self.cost.clone();
|
||||
|
||||
let mut ref_count = vec![0usize; self.literal_index.len()];
|
||||
for &index in &self.literal_index {
|
||||
ref_count[index] += 1;
|
||||
}
|
||||
|
||||
let mut shifted = vec![];
|
||||
for (&index, &cost) in self.literal_index.iter().zip(self.cost.iter()) {
|
||||
let delta = (self.cost[index] - cost) / ref_count[index] as f32;
|
||||
shifted.push(delta);
|
||||
shifted[index] -= delta;
|
||||
}
|
||||
|
||||
for (cost, delta) in self.cost.iter_mut().zip(shifted.into_iter()) {
|
||||
*cost += delta;
|
||||
}
|
||||
}
|
||||
|
||||
/// Reverses the heatmap
|
||||
pub fn reverse(&mut self) {
|
||||
self.data.reverse();
|
||||
self.cost.reverse();
|
||||
self.literal_index.reverse();
|
||||
for index in self.literal_index.iter_mut() {
|
||||
*index = self.data.len() - *index;
|
||||
}
|
||||
}
|
||||
|
||||
/// The number of (uncompressed) bytes of data in this heatmap
|
||||
pub fn len(&self) -> usize {
|
||||
self.cost.len()
|
||||
}
|
||||
|
||||
/// Returns whether the byte at `index` was encoded as a literal
|
||||
pub fn is_literal(&self, index: usize) -> bool {
|
||||
self.literal_index[index] == index
|
||||
}
|
||||
|
||||
/// Returns the cost of encoding the byte at `index` in (fractional) bits.
|
||||
/// The cost of literal bytes is spread across the matches that reference it.
|
||||
/// See `raw_cost` for the raw encoding cost of each byte.
|
||||
pub fn cost(&self, index: usize) -> f32 {
|
||||
self.cost[index]
|
||||
}
|
||||
|
||||
/// Returns the raw cost of encoding the byte at `index` in (fractional) bits
|
||||
pub fn raw_cost(&self, index: usize) -> f32 {
|
||||
self.raw_cost[index]
|
||||
}
|
||||
|
||||
/// Returns the uncompressed data byte at `index`
|
||||
pub fn byte(&self, index: usize) -> u8 {
|
||||
self.data[index]
|
||||
}
|
||||
|
||||
#[cfg(feature = "crossterm")]
|
||||
/// Print the heatmap as a colored hexdump
|
||||
pub fn print_as_hex(&self) -> std::io::Result<()> {
|
||||
self.print_as_hex_internal(false)
|
||||
}
|
||||
|
||||
#[cfg(feature = "crossterm")]
|
||||
/// Print the heatmap as a colored hexdump, based on `raw_cost`.
|
||||
pub fn print_as_hex_raw_cost(&self) -> std::io::Result<()> {
|
||||
self.print_as_hex_internal(true)
|
||||
}
|
||||
|
||||
#[cfg(feature = "crossterm")]
|
||||
fn print_as_hex_internal(&self, report_raw_cost: bool) -> std::io::Result<()> {
|
||||
use crossterm::{
|
||||
style::{Attribute, Color, Print, SetAttribute, SetBackgroundColor},
|
||||
QueueableCommand,
|
||||
};
|
||||
use std::io::{stdout, Write};
|
||||
|
||||
fn set_color(
|
||||
mut out: impl QueueableCommand,
|
||||
heatmap: &Heatmap,
|
||||
index: usize,
|
||||
num_colors: u16,
|
||||
report_raw_cost: bool,
|
||||
) -> std::io::Result<()> {
|
||||
let cost = if report_raw_cost {
|
||||
heatmap.raw_cost(index)
|
||||
} else {
|
||||
heatmap.cost(index)
|
||||
};
|
||||
if num_colors < 256 {
|
||||
let colors = [
|
||||
Color::Red,
|
||||
Color::Yellow,
|
||||
Color::Green,
|
||||
Color::Cyan,
|
||||
Color::Blue,
|
||||
Color::DarkBlue,
|
||||
Color::Black,
|
||||
];
|
||||
let color_index = (3. - cost.log2())
|
||||
.round()
|
||||
.max(0.)
|
||||
.min((colors.len() - 1) as f32) as usize;
|
||||
out.queue(SetBackgroundColor(colors[color_index]))?;
|
||||
} else {
|
||||
let colors = [
|
||||
196, 166, 136, 106, 76, 46, 41, 36, 31, 26, 21, 20, 19, 18, 17, 16,
|
||||
];
|
||||
let color_index = ((3. - cost.log2()) * 2.5)
|
||||
.round()
|
||||
.max(0.)
|
||||
.min((colors.len() - 1) as f32) as usize;
|
||||
out.queue(SetBackgroundColor(Color::AnsiValue(colors[color_index])))?;
|
||||
}
|
||||
out.queue(SetAttribute(if heatmap.is_literal(index) {
|
||||
Attribute::Underlined
|
||||
} else {
|
||||
Attribute::NoUnderline
|
||||
}))?;
|
||||
Ok(())
|
||||
}
|
||||
|
||||
let num_colors = crossterm::style::available_color_count();
|
||||
|
||||
let term_width = crossterm::terminal::size()?.0.min(120) as usize;
|
||||
let bytes_per_row = (term_width - 8) / 4;
|
||||
|
||||
for row_start in (0..self.data.len()).step_by(bytes_per_row) {
|
||||
let row_range = row_start..self.data.len().min(row_start + bytes_per_row);
|
||||
let mut stdout = stdout();
|
||||
|
||||
stdout.queue(Print(&format!("{:04x} ", row_start)))?;
|
||||
|
||||
for i in row_range.clone() {
|
||||
set_color(&mut stdout, self, i, num_colors, report_raw_cost)?;
|
||||
stdout.queue(Print(&format!("{:02x} ", self.data[i])))?;
|
||||
}
|
||||
|
||||
let num_spaces = 1 + (bytes_per_row - (row_range.end - row_range.start)) * 3;
|
||||
let gap: String = std::iter::repeat(' ').take(num_spaces).collect();
|
||||
stdout
|
||||
.queue(SetAttribute(Attribute::Reset))?
|
||||
.queue(Print(&gap))?;
|
||||
|
||||
for i in row_range.clone() {
|
||||
set_color(&mut stdout, self, i, num_colors, report_raw_cost)?;
|
||||
let byte = self.data[i];
|
||||
if byte >= 32 && byte < 127 {
|
||||
stdout.queue(Print(format!("{}", byte as char)))?;
|
||||
} else {
|
||||
stdout.queue(Print("."))?;
|
||||
}
|
||||
}
|
||||
|
||||
stdout
|
||||
.queue(SetAttribute(Attribute::Reset))?
|
||||
.queue(Print("\n"))?;
|
||||
|
||||
stdout.flush()?;
|
||||
}
|
||||
|
||||
Ok(())
|
||||
}
|
||||
}
|
||||
66
src/lib.rs
66
src/lib.rs
@@ -1,31 +1,75 @@
|
||||
#![deny(missing_docs)]
|
||||
|
||||
//! Compression and decompression of the upkr format and variants.
|
||||
//!
|
||||
//! Upkr is a compression format initially designed for the MicroW8 fantasy console,
|
||||
//! with design goals being a competitive compression ratio, reasonable fast
|
||||
//! decompression, low memory overhead and very small decompression code
|
||||
//! when handoptimized in assembler. (An optimized DOS execuable decompressor is <140 bytes.)
|
||||
|
||||
mod context_state;
|
||||
mod greedy_packer;
|
||||
mod heatmap;
|
||||
mod lz;
|
||||
mod match_finder;
|
||||
mod parsing_packer;
|
||||
mod rans;
|
||||
|
||||
pub use lz::{calculate_margin, unpack, UnpackError};
|
||||
pub use heatmap::Heatmap;
|
||||
pub use lz::{calculate_margin, create_heatmap, unpack, UnpackError};
|
||||
|
||||
/// The type of a callback function to be given to the `pack` function.
|
||||
///
|
||||
/// It will be periodically called with the number of bytes of the input already processed.
|
||||
pub type ProgressCallback<'a> = &'a mut dyn FnMut(usize);
|
||||
|
||||
/// A configuration of which compression format variation to use.
|
||||
///
|
||||
/// Use `Config::default()` for the standard upkr format.
|
||||
///
|
||||
/// Compression format variants exist to help with micro-optimizations in uncompression
|
||||
/// code on specific platforms.
|
||||
|
||||
#[derive(Debug)]
|
||||
pub struct Config {
|
||||
/// Shift in bits from a bitstream into the rANS state, rather than whole bytes.
|
||||
/// This decreases the size of the rNAS state to 16 bits which is very useful on
|
||||
/// 8 bit platforms.
|
||||
pub use_bitstream: bool,
|
||||
/// The number of parity contexts (usually 1, 2 or 4). This can improve compression
|
||||
/// on data that consists of regular groups of 2 or 4 bytes. One example is 32bit ARM
|
||||
/// code, where each instruction is 4 bytes, so `parity_contexts = 4` improves compression
|
||||
/// quite a bit. Defaults to `1`.
|
||||
pub parity_contexts: usize,
|
||||
|
||||
/// Invert the encoding of bits in the rANS coder. `bit = state_lo >= prob` instead of
|
||||
/// `bit = state_lo < prob`.
|
||||
pub invert_bit_encoding: bool,
|
||||
/// The boolean value which encodes a match. Defaults to `true`.
|
||||
pub is_match_bit: bool,
|
||||
/// The boolean value which encodes a new offset (rather than re-using the previous offset).
|
||||
/// Defaults to `true`.
|
||||
pub new_offset_bit: bool,
|
||||
/// The boolean value which encodes that there are more bits comming for length/offset values.
|
||||
/// Defaults to `true`.
|
||||
pub continue_value_bit: bool,
|
||||
|
||||
/// Reverses the bits in the bitstream.
|
||||
pub bitstream_is_big_endian: bool,
|
||||
/// A slightly less accurate, but slightly simpler variation of the prob update in the
|
||||
/// rANS coder, Used for the z80 uncompressor.
|
||||
pub simplified_prob_update: bool,
|
||||
|
||||
/// Disables support for re-using the last offset in the compression format.
|
||||
/// This might save a few bytes when working with very small data.
|
||||
pub no_repeated_offsets: bool,
|
||||
/// Standard upkr encodes the EOF marker in the offset. This encodes it in the match length
|
||||
/// instead.
|
||||
pub eof_in_length: bool,
|
||||
|
||||
/// The maximum match offset value to encode when compressing.
|
||||
pub max_offset: usize,
|
||||
/// The maximum match length value to encode when compressing.
|
||||
pub max_length: usize,
|
||||
}
|
||||
|
||||
@@ -53,7 +97,7 @@ impl Default for Config {
|
||||
}
|
||||
|
||||
impl Config {
|
||||
pub fn min_length(&self) -> usize {
|
||||
fn min_length(&self) -> usize {
|
||||
if self.eof_in_length {
|
||||
2
|
||||
} else {
|
||||
@@ -62,6 +106,21 @@ impl Config {
|
||||
}
|
||||
}
|
||||
|
||||
/// Compresses the given data.
|
||||
///
|
||||
/// # Arguments
|
||||
/// - `data`: The data to compress
|
||||
/// - `level`: The compression level (0-9). Increasing the level by one roughly halves the
|
||||
/// compression speed.
|
||||
/// - `config`: The compression format variant to use.
|
||||
/// - `progress_callback`: An optional callback which will periodically be called with
|
||||
/// the number of bytes already processed.
|
||||
///
|
||||
/// # Example
|
||||
/// ```rust
|
||||
/// let compressed_data = upkr::pack(b"Hello, World! Yellow world!", 0, &upkr::Config::default(), None);
|
||||
/// assert!(compressed_data.len() < 27);
|
||||
/// ```
|
||||
pub fn pack(
|
||||
data: &[u8],
|
||||
level: u8,
|
||||
@@ -75,6 +134,9 @@ pub fn pack(
|
||||
}
|
||||
}
|
||||
|
||||
/// Estimate the exact (fractional) size of upkr compressed data.
|
||||
///
|
||||
/// Note that this currently does NOT work for the bitstream variant.
|
||||
pub fn compressed_size(mut data: &[u8]) -> f32 {
|
||||
let mut state = 0;
|
||||
while state < 4096 {
|
||||
|
||||
73
src/lz.rs
73
src/lz.rs
@@ -1,4 +1,5 @@
|
||||
use crate::context_state::ContextState;
|
||||
use crate::heatmap::Heatmap;
|
||||
use crate::rans::{EntropyCoder, RansDecoder};
|
||||
use crate::Config;
|
||||
use thiserror::Error;
|
||||
@@ -132,42 +133,91 @@ impl CoderState {
|
||||
}
|
||||
}
|
||||
|
||||
/// The error type for the uncompressing related functions
|
||||
#[derive(Error, Debug)]
|
||||
pub enum UnpackError {
|
||||
/// a match offset pointing beyond the start of the unpacked data was encountered
|
||||
#[error("match offset out of range: {offset} > {position}")]
|
||||
OffsetOutOfRange { offset: usize, position: usize },
|
||||
OffsetOutOfRange {
|
||||
/// the match offset
|
||||
offset: usize,
|
||||
/// the current position in the uncompressed stream
|
||||
position: usize,
|
||||
},
|
||||
/// The passed size limit was exceeded
|
||||
#[error("Unpacked data over size limit: {size} > {limit}")]
|
||||
OverSize { size: usize, limit: usize },
|
||||
OverSize {
|
||||
/// the size of the uncompressed data
|
||||
size: usize,
|
||||
/// the size limit passed into the function
|
||||
limit: usize,
|
||||
},
|
||||
/// The end of the packed data was reached without an encoded EOF marker
|
||||
#[error("Unexpected end of input data")]
|
||||
UnexpectedEOF {
|
||||
#[from]
|
||||
/// the underlying EOF error in the rANS decoder
|
||||
source: crate::rans::UnexpectedEOF,
|
||||
},
|
||||
/// An offset or length value was found that exceeded 32bit
|
||||
#[error("Overflow while reading value")]
|
||||
ValueOverflow,
|
||||
}
|
||||
|
||||
/// Uncompress a piece of compressed data
|
||||
///
|
||||
/// Returns either the uncompressed data, or an `UnpackError`
|
||||
///
|
||||
/// # Parameters
|
||||
///
|
||||
/// - `packed_data`: the compressed data
|
||||
/// - `config`: the exact compression format config used to compress the data
|
||||
/// - `max_size`: the maximum size of uncompressed data to return. When this is exceeded,
|
||||
/// `UnpackError::OverSize` is returned
|
||||
pub fn unpack(
|
||||
packed_data: &[u8],
|
||||
config: &Config,
|
||||
max_size: usize,
|
||||
) -> Result<Vec<u8>, UnpackError> {
|
||||
let mut result = vec![];
|
||||
let _ = unpack_internal(Some(&mut result), packed_data, config, max_size)?;
|
||||
let _ = unpack_internal(Some(&mut result), None, packed_data, config, max_size)?;
|
||||
Ok(result)
|
||||
}
|
||||
|
||||
/// Calculates the minimum margin when overlapping buffers.
|
||||
///
|
||||
/// Returns the minimum margin needed between the end of the compressed data and the
|
||||
/// end of the uncompressed data when overlapping the two buffers to save on RAM.
|
||||
pub fn calculate_margin(packed_data: &[u8], config: &Config) -> Result<isize, UnpackError> {
|
||||
unpack_internal(None, packed_data, config, usize::MAX)
|
||||
unpack_internal(None, None, packed_data, config, usize::MAX)
|
||||
}
|
||||
|
||||
pub fn unpack_internal(
|
||||
/// Calculates a `Heatmap` from compressed data.
|
||||
///
|
||||
/// # Parameters
|
||||
///
|
||||
/// - `packed_data`: the compressed data
|
||||
/// - `config`: the exact compression format config used to compress the data
|
||||
/// - `max_size`: the maximum size of the heatmap to return. When this is exceeded,
|
||||
/// `UnpackError::OverSize` is returned
|
||||
pub fn create_heatmap(
|
||||
packed_data: &[u8],
|
||||
config: &Config,
|
||||
max_size: usize,
|
||||
) -> Result<Heatmap, UnpackError> {
|
||||
let mut heatmap = Heatmap::new();
|
||||
let _ = unpack_internal(None, Some(&mut heatmap), packed_data, config, max_size)?;
|
||||
Ok(heatmap)
|
||||
}
|
||||
|
||||
fn unpack_internal(
|
||||
mut result: Option<&mut Vec<u8>>,
|
||||
mut heatmap: Option<&mut Heatmap>,
|
||||
packed_data: &[u8],
|
||||
config: &Config,
|
||||
max_size: usize,
|
||||
) -> Result<isize, UnpackError> {
|
||||
let mut decoder = RansDecoder::new(packed_data, &config);
|
||||
let mut decoder = RansDecoder::new(packed_data, &config)?;
|
||||
let mut contexts = ContextState::new((1 + 255) * config.parity_contexts + 1 + 64 + 64, &config);
|
||||
let mut offset = usize::MAX;
|
||||
let mut position = 0usize;
|
||||
@@ -198,6 +248,7 @@ pub fn unpack_internal(
|
||||
}
|
||||
|
||||
loop {
|
||||
let prev_decoder = decoder.clone();
|
||||
margin = margin.max(position as isize - decoder.pos() as isize);
|
||||
let literal_base = position % config.parity_contexts * 256;
|
||||
if decoder.decode_with_context(&mut contexts.context_mut(literal_base))?
|
||||
@@ -231,6 +282,9 @@ pub fn unpack_internal(
|
||||
if offset > position {
|
||||
return Err(UnpackError::OffsetOutOfRange { offset, position });
|
||||
}
|
||||
if let Some(ref mut heatmap) = heatmap {
|
||||
heatmap.add_match(offset, length, decoder.cost(&prev_decoder));
|
||||
}
|
||||
if let Some(ref mut result) = result {
|
||||
for _ in 0..length {
|
||||
if result.len() < max_size {
|
||||
@@ -251,6 +305,9 @@ pub fn unpack_internal(
|
||||
context_index = (context_index << 1) | bit as usize;
|
||||
byte |= (bit as u8) << i;
|
||||
}
|
||||
if let Some(ref mut heatmap) = heatmap {
|
||||
heatmap.add_literal(byte, decoder.cost(&prev_decoder));
|
||||
}
|
||||
if let Some(ref mut result) = result {
|
||||
if result.len() < max_size {
|
||||
result.push(byte);
|
||||
@@ -261,6 +318,10 @@ pub fn unpack_internal(
|
||||
}
|
||||
}
|
||||
|
||||
if let Some(heatmap) = heatmap {
|
||||
heatmap.finish();
|
||||
}
|
||||
|
||||
if position > max_size {
|
||||
return Err(UnpackError::OverSize {
|
||||
size: position,
|
||||
|
||||
190
src/main.rs
190
src/main.rs
@@ -9,6 +9,10 @@ fn main() -> Result<()> {
|
||||
let mut reverse = false;
|
||||
let mut unpack = false;
|
||||
let mut calculate_margin = false;
|
||||
let mut create_heatmap = false;
|
||||
let mut report_raw_cost = false;
|
||||
#[allow(unused_mut)]
|
||||
let mut do_hexdump = false;
|
||||
let mut level = 2;
|
||||
let mut infile: Option<PathBuf> = None;
|
||||
let mut outfile: Option<PathBuf> = None;
|
||||
@@ -56,8 +60,12 @@ fn main() -> Result<()> {
|
||||
level = 9;
|
||||
}
|
||||
|
||||
Short('u') | Long("unpack") => unpack = true,
|
||||
Short('u') | Long("unpack") | Short('d') | Long("decompress") => unpack = true,
|
||||
Long("margin") => calculate_margin = true,
|
||||
Long("heatmap") => create_heatmap = true,
|
||||
Long("raw-cost") => report_raw_cost = true,
|
||||
#[cfg(feature = "crossterm")]
|
||||
Long("hexdump") => do_hexdump = true,
|
||||
Short('l') | Long("level") => level = parser.value()?.parse()?,
|
||||
Short(n) if n.is_ascii_digit() => level = n as u8 - b'0',
|
||||
Short('h') | Long("help") => print_help(0),
|
||||
@@ -72,64 +80,52 @@ fn main() -> Result<()> {
|
||||
}
|
||||
}
|
||||
|
||||
let infile = infile.unwrap_or_else(|| print_help(1));
|
||||
let outfile = outfile.unwrap_or_else(|| {
|
||||
let mut name = infile.clone();
|
||||
if unpack {
|
||||
if name.extension().filter(|&e| e == "upk").is_some() {
|
||||
name.set_extension("");
|
||||
} else {
|
||||
name.set_extension("bin");
|
||||
}
|
||||
} else {
|
||||
let mut filename = name
|
||||
.file_name()
|
||||
.unwrap_or_else(|| OsStr::new(""))
|
||||
.to_os_string();
|
||||
filename.push(".upk");
|
||||
name.set_file_name(filename);
|
||||
}
|
||||
name
|
||||
});
|
||||
let infile = IoTarget::from_filename(infile);
|
||||
let outfile = |tpe: OutFileType| infile.output(tpe, &outfile);
|
||||
|
||||
if config.parity_contexts != 1 && config.parity_contexts != 2 && config.parity_contexts != 4 {
|
||||
eprintln!("--parity has to be 1, 2, or 4");
|
||||
process::exit(1);
|
||||
}
|
||||
|
||||
if !unpack && !calculate_margin {
|
||||
let mut data = vec![];
|
||||
File::open(infile)?.read_to_end(&mut data)?;
|
||||
if !unpack && !calculate_margin && !create_heatmap {
|
||||
let mut data = infile.read()?;
|
||||
if reverse {
|
||||
data.reverse();
|
||||
}
|
||||
|
||||
let mut pb = pbr::ProgressBar::new(data.len() as u64);
|
||||
pb.set_units(pbr::Units::Bytes);
|
||||
let mut packed_data = upkr::pack(
|
||||
&data,
|
||||
level,
|
||||
&config,
|
||||
Some(&mut |pos| {
|
||||
pb.set(pos as u64);
|
||||
}),
|
||||
);
|
||||
pb.finish();
|
||||
#[cfg(feature = "terminal")]
|
||||
let mut packed_data = {
|
||||
let mut pb = pbr::ProgressBar::on(std::io::stderr(), data.len() as u64);
|
||||
pb.set_units(pbr::Units::Bytes);
|
||||
let packed_data = upkr::pack(
|
||||
&data,
|
||||
level,
|
||||
&config,
|
||||
Some(&mut |pos| {
|
||||
pb.set(pos as u64);
|
||||
}),
|
||||
);
|
||||
pb.finish();
|
||||
eprintln!();
|
||||
packed_data
|
||||
};
|
||||
#[cfg(not(feature = "terminal"))]
|
||||
let mut packed_data = upkr::pack(&data, level, &config, None);
|
||||
|
||||
if reverse {
|
||||
packed_data.reverse();
|
||||
}
|
||||
|
||||
println!(
|
||||
eprintln!(
|
||||
"Compressed {} bytes to {} bytes ({}%)",
|
||||
data.len(),
|
||||
packed_data.len(),
|
||||
packed_data.len() as f32 * 100. / data.len() as f32
|
||||
);
|
||||
File::create(outfile)?.write_all(&packed_data)?;
|
||||
outfile(OutFileType::Packed).write(&packed_data)?;
|
||||
} else {
|
||||
let mut data = vec![];
|
||||
File::open(infile)?.read_to_end(&mut data)?;
|
||||
let mut data = infile.read()?;
|
||||
if reverse {
|
||||
data.reverse();
|
||||
}
|
||||
@@ -138,7 +134,36 @@ fn main() -> Result<()> {
|
||||
if reverse {
|
||||
unpacked_data.reverse();
|
||||
}
|
||||
File::create(outfile)?.write_all(&unpacked_data)?;
|
||||
outfile(OutFileType::Unpacked).write(&unpacked_data)?;
|
||||
}
|
||||
if create_heatmap {
|
||||
let mut heatmap = upkr::create_heatmap(&data, &config, max_unpacked_size)?;
|
||||
if reverse {
|
||||
heatmap.reverse();
|
||||
}
|
||||
match do_hexdump {
|
||||
#[cfg(feature = "crossterm")]
|
||||
true => {
|
||||
if report_raw_cost {
|
||||
heatmap.print_as_hex_raw_cost()?
|
||||
} else {
|
||||
heatmap.print_as_hex()?
|
||||
}
|
||||
}
|
||||
_ => {
|
||||
let mut heatmap_bin = Vec::with_capacity(heatmap.len());
|
||||
for i in 0..heatmap.len() {
|
||||
let cost = if report_raw_cost {
|
||||
heatmap.raw_cost(i)
|
||||
} else {
|
||||
heatmap.cost(i)
|
||||
};
|
||||
let cost = (cost.log2() * 8. + 64.).round().max(0.).min(127.) as u8;
|
||||
heatmap_bin.push((cost << 1) | heatmap.is_literal(i) as u8);
|
||||
}
|
||||
outfile(OutFileType::Heatmap).write(&heatmap_bin)?;
|
||||
}
|
||||
}
|
||||
}
|
||||
if calculate_margin {
|
||||
println!("{}", upkr::calculate_margin(&data, &config)?);
|
||||
@@ -148,17 +173,102 @@ fn main() -> Result<()> {
|
||||
Ok(())
|
||||
}
|
||||
|
||||
enum OutFileType {
|
||||
Packed,
|
||||
Unpacked,
|
||||
Heatmap,
|
||||
}
|
||||
|
||||
enum IoTarget {
|
||||
StdInOut,
|
||||
File(PathBuf),
|
||||
}
|
||||
|
||||
impl IoTarget {
|
||||
fn from_filename(filename: Option<PathBuf>) -> IoTarget {
|
||||
if let Some(path) = filename {
|
||||
if path.as_os_str() == "-" {
|
||||
IoTarget::StdInOut
|
||||
} else {
|
||||
IoTarget::File(path)
|
||||
}
|
||||
} else {
|
||||
IoTarget::StdInOut
|
||||
}
|
||||
}
|
||||
|
||||
fn read(&self) -> Result<Vec<u8>> {
|
||||
let mut buffer = vec![];
|
||||
match *self {
|
||||
IoTarget::StdInOut => std::io::stdin().read_to_end(&mut buffer)?,
|
||||
IoTarget::File(ref path) => File::open(path)?.read_to_end(&mut buffer)?,
|
||||
};
|
||||
Ok(buffer)
|
||||
}
|
||||
|
||||
fn write(&self, data: &[u8]) -> Result<()> {
|
||||
match *self {
|
||||
IoTarget::StdInOut => std::io::stdout().write_all(data)?,
|
||||
IoTarget::File(ref path) => File::create(path)?.write_all(data)?,
|
||||
};
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fn output(&self, tpe: OutFileType, outname: &Option<PathBuf>) -> IoTarget {
|
||||
if outname.is_some() {
|
||||
return IoTarget::from_filename(outname.clone());
|
||||
}
|
||||
match *self {
|
||||
IoTarget::StdInOut => IoTarget::StdInOut,
|
||||
IoTarget::File(ref path) => {
|
||||
let mut name = path.clone();
|
||||
match tpe {
|
||||
OutFileType::Packed => {
|
||||
let mut filename = name
|
||||
.file_name()
|
||||
.unwrap_or_else(|| OsStr::new(""))
|
||||
.to_os_string();
|
||||
filename.push(".upk");
|
||||
name.set_file_name(filename);
|
||||
}
|
||||
OutFileType::Unpacked => {
|
||||
if name.extension().filter(|&e| e == "upk").is_some() {
|
||||
name.set_extension("");
|
||||
} else {
|
||||
name.set_extension("bin");
|
||||
}
|
||||
}
|
||||
OutFileType::Heatmap => {
|
||||
name.set_extension("heatmap");
|
||||
}
|
||||
}
|
||||
IoTarget::File(name)
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
fn print_help(exit_code: i32) -> ! {
|
||||
eprintln!("Usage:");
|
||||
eprintln!(" upkr [-l level(0-9)] [config options] <infile> [<outfile>]");
|
||||
eprintln!(" upkr -u [config options] <infile> [<outfile>]");
|
||||
eprintln!(" upkr --heatmap [config options] <infile> [<outfile>]");
|
||||
eprintln!(" upkr --margin [config options] <infile>");
|
||||
eprintln!();
|
||||
eprintln!(" -l, --level N compression level 0-9");
|
||||
eprintln!(" -0, ..., -9 short form for setting compression level");
|
||||
eprintln!(" -u, --unpack unpack infile");
|
||||
eprintln!(" -d, --decompress decompress infile");
|
||||
eprintln!(" --heatmap calculate heatmap from compressed file");
|
||||
eprintln!(" --raw-cost report raw cost of literals in heatmap");
|
||||
#[cfg(feature = "crossterm")]
|
||||
eprintln!(" --hexdump print heatmap as colored hexdump");
|
||||
eprintln!(" --margin calculate margin for overlapped unpacking of a packed file");
|
||||
eprintln!();
|
||||
eprintln!("When no infile is given, or the infile is '-', read from stdin.");
|
||||
eprintln!(
|
||||
"When no outfile is given and reading from stdin, or when outfile is '-', write to stdout."
|
||||
);
|
||||
eprintln!();
|
||||
eprintln!("Version: {}", env!("CARGO_PKG_VERSION"));
|
||||
eprintln!();
|
||||
eprintln!("Config presets for specific unpackers:");
|
||||
|
||||
24
src/rans.rs
24
src/rans.rs
@@ -148,6 +148,7 @@ impl EntropyCoder for CostCounter {
|
||||
}
|
||||
}
|
||||
|
||||
#[derive(Clone)]
|
||||
pub struct RansDecoder<'a> {
|
||||
data: &'a [u8],
|
||||
pos: usize,
|
||||
@@ -166,8 +167,8 @@ const PROB_MASK: u32 = ONE_PROB - 1;
|
||||
pub struct UnexpectedEOF;
|
||||
|
||||
impl<'a> RansDecoder<'a> {
|
||||
pub fn new(data: &'a [u8], config: &Config) -> RansDecoder<'a> {
|
||||
RansDecoder {
|
||||
pub fn new(data: &'a [u8], config: &Config) -> Result<RansDecoder<'a>, UnexpectedEOF> {
|
||||
let mut decoder = RansDecoder {
|
||||
data,
|
||||
pos: 0,
|
||||
state: 0,
|
||||
@@ -176,7 +177,9 @@ impl<'a> RansDecoder<'a> {
|
||||
bits_left: 0,
|
||||
invert_bit_encoding: config.invert_bit_encoding,
|
||||
bitstream_is_big_endian: config.bitstream_is_big_endian,
|
||||
}
|
||||
};
|
||||
decoder.refill()?;
|
||||
Ok(decoder)
|
||||
}
|
||||
|
||||
pub fn pos(&self) -> usize {
|
||||
@@ -189,8 +192,7 @@ impl<'a> RansDecoder<'a> {
|
||||
Ok(bit)
|
||||
}
|
||||
|
||||
pub fn decode_bit(&mut self, prob: u16) -> Result<bool, UnexpectedEOF> {
|
||||
let prob = prob as u32;
|
||||
fn refill(&mut self) -> Result<(), UnexpectedEOF> {
|
||||
if self.use_bitstream {
|
||||
while self.state < 32768 {
|
||||
if self.bits_left == 0 {
|
||||
@@ -219,6 +221,13 @@ impl<'a> RansDecoder<'a> {
|
||||
self.pos += 1;
|
||||
}
|
||||
}
|
||||
Ok(())
|
||||
}
|
||||
|
||||
pub fn decode_bit(&mut self, prob: u16) -> Result<bool, UnexpectedEOF> {
|
||||
self.refill()?;
|
||||
|
||||
let prob = prob as u32;
|
||||
|
||||
let bit = (self.state & PROB_MASK) < prob;
|
||||
|
||||
@@ -231,4 +240,9 @@ impl<'a> RansDecoder<'a> {
|
||||
|
||||
Ok(bit ^ self.invert_bit_encoding)
|
||||
}
|
||||
|
||||
pub fn cost(&self, prev: &RansDecoder) -> f32 {
|
||||
f32::log2(prev.state as f32) - f32::log2(self.state as f32)
|
||||
+ (self.pos - prev.pos) as f32 * 8.
|
||||
}
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user