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Merge pull request #1208 from DioEgizio/fix-unused-libs

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Removes `classparser` and `xz-embedded`
This commit is contained in:
flow 2022-10-16 10:41:43 -03:00 committed by GitHub
commit aecd158d3c
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GPG Key ID: 4AEE18F83AFDEB23
26 changed files with 1 additions and 4891 deletions
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2
CMakeLists.txt
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@ -305,7 +305,6 @@ add_subdirectory(libraries/systeminfo) # system information library
add_subdirectory(libraries/hoedown) # markdown parser add_subdirectory(libraries/hoedown) # markdown parser
add_subdirectory(libraries/launcher) # java based launcher part for Minecraft add_subdirectory(libraries/launcher) # java based launcher part for Minecraft
add_subdirectory(libraries/javacheck) # java compatibility checker add_subdirectory(libraries/javacheck) # java compatibility checker
add_subdirectory(libraries/xz-embedded) # xz compression
if (FORCE_BUNDLED_QUAZIP) if (FORCE_BUNDLED_QUAZIP)
message(STATUS "Using bundled QuaZip") message(STATUS "Using bundled QuaZip")
set(BUILD_SHARED_LIBS 0) # link statically to avoid conflicts. set(BUILD_SHARED_LIBS 0) # link statically to avoid conflicts.
@ -316,7 +315,6 @@ else()
endif() endif()
add_subdirectory(libraries/rainbow) # Qt extension for colors add_subdirectory(libraries/rainbow) # Qt extension for colors
add_subdirectory(libraries/LocalPeer) # fork of a library from Qt solutions add_subdirectory(libraries/LocalPeer) # fork of a library from Qt solutions
add_subdirectory(libraries/classparser) # class parser library
if(NOT tomlplusplus_FOUND) if(NOT tomlplusplus_FOUND)
message(STATUS "Using bundled tomlplusplus") message(STATUS "Using bundled tomlplusplus")
add_subdirectory(libraries/tomlplusplus) # toml parser add_subdirectory(libraries/tomlplusplus) # toml parser

1
launcher/CMakeLists.txt
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@ -968,7 +968,6 @@ add_library(Launcher_logic STATIC ${LOGIC_SOURCES} ${LAUNCHER_SOURCES} ${LAUNCHE
target_include_directories(Launcher_logic PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}) target_include_directories(Launcher_logic PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})
target_link_libraries(Launcher_logic target_link_libraries(Launcher_logic
systeminfo systeminfo
Launcher_classparser
Launcher_murmur2 Launcher_murmur2
nbt++ nbt++
${ZLIB_LIBRARIES} ${ZLIB_LIBRARIES}

14
libraries/README.md
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@ -2,14 +2,6 @@
This folder has third-party or otherwise external libraries needed for other parts to work. This folder has third-party or otherwise external libraries needed for other parts to work.
## classparser
A simplistic parser for Java class files.
This library has served as a base for some (much more full-featured and advanced) work under NDA for AVG. It, however, should NOT be confused with that work.
Copyright belongs to Petr Mrázek, unless explicitly stated otherwise in the source files. Available under the Apache 2.0 license.
## filesystem ## filesystem
Gulrak's implementation of C++17 std::filesystem for C++11 /C++14/C++17/C++20 on Windows, macOS, Linux and FreeBSD. Gulrak's implementation of C++17 std::filesystem for C++11 /C++14/C++17/C++20 on Windows, macOS, Linux and FreeBSD.
@ -192,9 +184,3 @@ A TOML language parser. Used by Forge 1.14+ to store mod metadata.
See [github repo](https://github.com/marzer/tomlplusplus). See [github repo](https://github.com/marzer/tomlplusplus).
Licenced under the MIT licence. Licenced under the MIT licence.
## xz-embedded
Tiny implementation of LZMA2 de/compression. This format was only used by Forge to save bandwidth.
Public domain.

42
libraries/classparser/CMakeLists.txt
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@ -1,42 +0,0 @@
project(classparser)
set(CMAKE_AUTOMOC ON)
######## Check endianness ########
include(TestBigEndian)
test_big_endian(BIGENDIAN)
if(${BIGENDIAN})
add_definitions(-DMULTIMC_BIG_ENDIAN)
endif(${BIGENDIAN})
# Find Qt
if(QT_VERSION_MAJOR EQUAL 5)
find_package(Qt5 COMPONENTS Core REQUIRED)
elseif(Launcher_QT_VERSION_MAJOR EQUAL 6)
find_package(Qt6 COMPONENTS Core REQUIRED)
endif()
set(CLASSPARSER_HEADERS
# Public headers
include/classparser_config.h
include/classparser.h
# Private headers
src/annotations.h
src/classfile.h
src/constants.h
src/errors.h
src/javaendian.h
src/membuffer.h
)
set(CLASSPARSER_SOURCES
src/classparser.cpp
src/annotations.cpp
)
add_definitions(-DCLASSPARSER_LIBRARY)
add_library(Launcher_classparser STATIC ${CLASSPARSER_SOURCES} ${CLASSPARSER_HEADERS})
target_include_directories(Launcher_classparser PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}/include")
target_link_libraries(Launcher_classparser QuaZip::QuaZip Qt${QT_VERSION_MAJOR}::Core)

27
libraries/classparser/include/classparser.h
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@ -1,27 +0,0 @@
/* Copyright 2013-2021 MultiMC Contributors
*
* Authors: Orochimarufan <orochimarufan.x3@gmail.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <QString>
#include "classparser_config.h"
namespace classparser
{
/**
* @brief Get the version from a minecraft.jar by parsing its class files. Expensive!
*/
QString GetMinecraftJarVersion(QString jar);
}

22
libraries/classparser/include/classparser_config.h
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@ -1,22 +0,0 @@
/* Copyright 2013-2021 MultiMC Contributors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <QtCore/QtGlobal>
#ifdef CLASSPARSER_LIBRARY
#define CLASSPARSER_EXPORT Q_DECL_EXPORT
#else
#define CLASSPARSER_EXPORT Q_DECL_IMPORT
#endif

85
libraries/classparser/src/annotations.cpp
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@ -1,85 +0,0 @@
#include "classfile.h"
#include "annotations.h"
#include <sstream>
namespace java
{
std::string annotation::toString()
{
std::ostringstream ss;
ss << "Annotation type : " << type_index << " - " << pool[type_index].str_data << std::endl;
ss << "Contains " << name_val_pairs.size() << " pairs:" << std::endl;
for (unsigned i = 0; i < name_val_pairs.size(); i++)
{
std::pair<uint16_t, element_value *> &val = name_val_pairs[i];
auto name_idx = val.first;
ss << pool[name_idx].str_data << "(" << name_idx << ")"
<< " = " << val.second->toString() << std::endl;
}
return ss.str();
}
annotation *annotation::read(util::membuffer &input, constant_pool &pool)
{
uint16_t type_index = 0;
input.read_be(type_index);
annotation *ann = new annotation(type_index, pool);
uint16_t num_pairs = 0;
input.read_be(num_pairs);
while (num_pairs)
{
uint16_t name_idx = 0;
// read name index
input.read_be(name_idx);
auto elem = element_value::readElementValue(input, pool);
// read value
ann->add_pair(name_idx, elem);
num_pairs--;
}
return ann;
}
element_value *element_value::readElementValue(util::membuffer &input,
java::constant_pool &pool)
{
element_value_type type = INVALID;
input.read(type);
uint16_t index = 0;
uint16_t index2 = 0;
std::vector<element_value *> vals;
switch (type)
{
case PRIMITIVE_BYTE:
case PRIMITIVE_CHAR:
case PRIMITIVE_DOUBLE:
case PRIMITIVE_FLOAT:
case PRIMITIVE_INT:
case PRIMITIVE_LONG:
case PRIMITIVE_SHORT:
case PRIMITIVE_BOOLEAN:
case STRING:
input.read_be(index);
return new element_value_simple(type, index, pool);
case ENUM_CONSTANT:
input.read_be(index);
input.read_be(index2);
return new element_value_enum(type, index, index2, pool);
case CLASS: // Class
input.read_be(index);
return new element_value_class(type, index, pool);
case ANNOTATION: // Annotation
// FIXME: runtime visibility info needs to be passed from parent
return new element_value_annotation(ANNOTATION, annotation::read(input, pool), pool);
case ARRAY: // Array
input.read_be(index);
for (int i = 0; i < index; i++)
{
vals.push_back(element_value::readElementValue(input, pool));
}
return new element_value_array(ARRAY, vals, pool);
default:
throw java::classfile_exception();
}
}
}

278
libraries/classparser/src/annotations.h
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@ -1,278 +0,0 @@
#pragma once
#include "classfile.h"
#include <map>
#include <vector>
namespace java
{
enum element_value_type : uint8_t
{
INVALID = 0,
STRING = 's',
ENUM_CONSTANT = 'e',
CLASS = 'c',
ANNOTATION = '@',
ARRAY = '[', // one array dimension
PRIMITIVE_INT = 'I', // integer
PRIMITIVE_BYTE = 'B', // signed byte
PRIMITIVE_CHAR = 'C', // Unicode character code point in the Basic Multilingual Plane,
// encoded with UTF-16
PRIMITIVE_DOUBLE = 'D', // double-precision floating-point value
PRIMITIVE_FLOAT = 'F', // single-precision floating-point value
PRIMITIVE_LONG = 'J', // long integer
PRIMITIVE_SHORT = 'S', // signed short
PRIMITIVE_BOOLEAN = 'Z' // true or false
};
/**
* The element_value structure is a discriminated union representing the value of an
*element-value pair.
* It is used to represent element values in all attributes that describe annotations
* - RuntimeVisibleAnnotations
* - RuntimeInvisibleAnnotations
* - RuntimeVisibleParameterAnnotations
* - RuntimeInvisibleParameterAnnotations).
*
* The element_value structure has the following format:
*/
class element_value
{
protected:
element_value_type type;
constant_pool &pool;
public:
element_value(element_value_type type, constant_pool &pool) : type(type), pool(pool) {};
virtual ~element_value() {}
element_value_type getElementValueType()
{
return type;
}
virtual std::string toString() = 0;
static element_value *readElementValue(util::membuffer &input, constant_pool &pool);
};
/**
* Each value of the annotations table represents a single runtime-visible annotation on a
* program element.
* The annotation structure has the following format:
*/
class annotation
{
public:
typedef std::vector<std::pair<uint16_t, element_value *>> value_list;
protected:
/**
* The value of the type_index item must be a valid index into the constant_pool table.
* The constant_pool entry at that index must be a CONSTANT_Utf8_info (§4.4.7) structure
* representing a field descriptor representing the annotation type corresponding
* to the annotation represented by this annotation structure.
*/
uint16_t type_index;
/**
* map between element_name_index and value.
*
* The value of the element_name_index item must be a valid index into the constant_pool
*table.
* The constant_pool entry at that index must be a CONSTANT_Utf8_info (§4.4.7) structure
*representing
* a valid field descriptor (§4.3.2) that denotes the name of the annotation type element
*represented
* by this element_value_pairs entry.
*/
value_list name_val_pairs;
/**
* Reference to the parent constant pool
*/
constant_pool &pool;
public:
annotation(uint16_t type_index, constant_pool &pool)
: type_index(type_index), pool(pool) {};
~annotation()
{
for (unsigned i = 0; i < name_val_pairs.size(); i++)
{
delete name_val_pairs[i].second;
}
}
void add_pair(uint16_t key, element_value *value)
{
name_val_pairs.push_back(std::make_pair(key, value));
}
;
value_list::const_iterator begin()
{
return name_val_pairs.cbegin();
}
value_list::const_iterator end()
{
return name_val_pairs.cend();
}
std::string toString();
static annotation *read(util::membuffer &input, constant_pool &pool);
};
typedef std::vector<annotation *> annotation_table;
/// type for simple value annotation elements
class element_value_simple : public element_value
{
protected:
/// index of the constant in the constant pool
uint16_t index;
public:
element_value_simple(element_value_type type, uint16_t index, constant_pool &pool)
: element_value(type, pool), index(index) {
// TODO: verify consistency
};
uint16_t getIndex()
{
return index;
}
virtual std::string toString()
{
return pool[index].toString();
}
;
};
/// The enum_const_value item is used if the tag item is 'e'.
class element_value_enum : public element_value
{
protected:
/**
* The value of the type_name_index item must be a valid index into the constant_pool table.
* The constant_pool entry at that index must be a CONSTANT_Utf8_info (§4.4.7) structure
* representing a valid field descriptor (§4.3.2) that denotes the internal form of the
* binary
* name (§4.2.1) of the type of the enum constant represented by this element_value
* structure.
*/
uint16_t typeIndex;
/**
* The value of the const_name_index item must be a valid index into the constant_pool
* table.
* The constant_pool entry at that index must be a CONSTANT_Utf8_info (§4.4.7) structure
* representing the simple name of the enum constant represented by this element_value
* structure.
*/
uint16_t valueIndex;
public:
element_value_enum(element_value_type type, uint16_t typeIndex, uint16_t valueIndex,
constant_pool &pool)
: element_value(type, pool), typeIndex(typeIndex), valueIndex(valueIndex)
{
// TODO: verify consistency
}
uint16_t getValueIndex()
{
return valueIndex;
}
uint16_t getTypeIndex()
{
return typeIndex;
}
virtual std::string toString()
{
return "enum value";
}
;
};
class element_value_class : public element_value
{
protected:
/**
* The class_info_index item must be a valid index into the constant_pool table.
* The constant_pool entry at that index must be a CONSTANT_Utf8_info (§4.4.7) structure
* representing the return descriptor (§4.3.3) of the type that is reified by the class
* represented by this element_value structure.
*
* For example, 'V' for Void.class, 'Ljava/lang/Object;' for Object, etc.
*
* Or in plain english, you can store type information in annotations. Yay.
*/
uint16_t classIndex;
public:
element_value_class(element_value_type type, uint16_t classIndex, constant_pool &pool)
: element_value(type, pool), classIndex(classIndex)
{
// TODO: verify consistency
}
uint16_t getIndex()
{
return classIndex;
}
virtual std::string toString()
{
return "class";
}
;
};
/// nested annotations... yay
class element_value_annotation : public element_value
{
private:
annotation *nestedAnnotation;
public:
element_value_annotation(element_value_type type, annotation *nestedAnnotation,
constant_pool &pool)
: element_value(type, pool), nestedAnnotation(nestedAnnotation) {};
~element_value_annotation()
{
if (nestedAnnotation)
{
delete nestedAnnotation;
nestedAnnotation = nullptr;
}
}
virtual std::string toString()
{
return "nested annotation";
}
;
};
/// and arrays!
class element_value_array : public element_value
{
public:
typedef std::vector<element_value *> elem_vec;
protected:
elem_vec values;
public:
element_value_array(element_value_type type, std::vector<element_value *> &values,
constant_pool &pool)
: element_value(type, pool), values(values) {};
~element_value_array()
{
for (unsigned i = 0; i < values.size(); i++)
{
delete values[i];
}
}
;
elem_vec::const_iterator begin()
{
return values.cbegin();
}
elem_vec::const_iterator end()
{
return values.cend();
}
virtual std::string toString()
{
return "array";
}
;
};
}

156
libraries/classparser/src/classfile.h
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@ -1,156 +0,0 @@
#pragma once
#include "membuffer.h"
#include "constants.h"
#include "annotations.h"
#include <map>
namespace java
{
/**
* Class representing a Java .class file
*/
class classfile : public util::membuffer
{
public:
classfile(char *data, std::size_t size) : membuffer(data, size)
{
valid = false;
is_synthetic = false;
read_be(magic);
if (magic != 0xCAFEBABE)
throw classfile_exception();
read_be(minor_version);
read_be(major_version);
constants.load(*this);
read_be(access_flags);
read_be(this_class);
read_be(super_class);
// Interfaces
uint16_t iface_count = 0;
read_be(iface_count);
while (iface_count)
{
uint16_t iface;
read_be(iface);
interfaces.push_back(iface);
iface_count--;
}
// Fields
// read fields (and attributes from inside fields) (and possible inner classes. yay for
// recursion!)
// for now though, we will ignore all attributes
/*
* field_info
* {
* u2 access_flags;
* u2 name_index;
* u2 descriptor_index;
* u2 attributes_count;
* attribute_info attributes[attributes_count];
* }
*/
uint16_t field_count = 0;
read_be(field_count);
while (field_count)
{
// skip field stuff
skip(6);
// and skip field attributes
uint16_t attr_count = 0;
read_be(attr_count);
while (attr_count)
{
skip(2);
uint32_t attr_length = 0;
read_be(attr_length);
skip(attr_length);
attr_count--;
}
field_count--;
}
// class methods
/*
* method_info
* {
* u2 access_flags;
* u2 name_index;
* u2 descriptor_index;
* u2 attributes_count;
* attribute_info attributes[attributes_count];
* }
*/
uint16_t method_count = 0;
read_be(method_count);
while (method_count)
{
skip(6);
// and skip method attributes
uint16_t attr_count = 0;
read_be(attr_count);
while (attr_count)
{
skip(2);
uint32_t attr_length = 0;
read_be(attr_length);
skip(attr_length);
attr_count--;
}
method_count--;
}
// class attributes
// there are many kinds of attributes. this is just the generic wrapper structure.
// type is decided by attribute name. extensions to the standard are *possible*
// class annotations are one kind of a attribute (one per class)
/*
* attribute_info
* {
* u2 attribute_name_index;
* u4 attribute_length;
* u1 info[attribute_length];
* }
*/
uint16_t class_attr_count = 0;
read_be(class_attr_count);
while (class_attr_count)
{
uint16_t name_idx = 0;
read_be(name_idx);
uint32_t attr_length = 0;
read_be(attr_length);
auto name = constants[name_idx];
if (name.str_data == "RuntimeVisibleAnnotations")
{
uint16_t num_annotations = 0;
read_be(num_annotations);
while (num_annotations)
{
visible_class_annotations.push_back(annotation::read(*this, constants));
num_annotations--;
}
}
else
skip(attr_length);
class_attr_count--;
}
valid = true;
}
;
bool valid;
bool is_synthetic;
uint32_t magic;
uint16_t minor_version;
uint16_t major_version;
constant_pool constants;
uint16_t access_flags;
uint16_t this_class;
uint16_t super_class;
// interfaces this class implements ? must be. investigate.
std::vector<uint16_t> interfaces;
// FIXME: doesn't free up memory on delete
java::annotation_table visible_class_annotations;
};
}

83
libraries/classparser/src/classparser.cpp
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@ -1,83 +0,0 @@
/* Copyright 2013-2021 MultiMC Contributors
*
* Authors: Orochimarufan <orochimarufan.x3@gmail.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "classfile.h"
#include "classparser.h"
#include <QFile>
#include <quazip/quazipfile.h>
#include <QDebug>
namespace classparser
{
QString GetMinecraftJarVersion(QString jarName)
{
QString version;
// check if minecraft.jar exists
QFile jar(jarName);
if (!jar.exists())
return version;
// open minecraft.jar
QuaZip zip(&jar);
if (!zip.open(QuaZip::mdUnzip))
return version;
// open Minecraft.class
zip.setCurrentFile("net/minecraft/client/Minecraft.class", QuaZip::csSensitive);
QuaZipFile Minecraft(&zip);
if (!Minecraft.open(QuaZipFile::ReadOnly))
return version;
// read Minecraft.class
qint64 size = Minecraft.size();
char *classfile = new char[size];
Minecraft.read(classfile, size);
// parse Minecraft.class
try
{
char *temp = classfile;
java::classfile MinecraftClass(temp, size);
java::constant_pool constants = MinecraftClass.constants;
for (java::constant_pool::container_type::const_iterator iter = constants.begin();
iter != constants.end(); iter++)
{
const java::constant &constant = *iter;
if (constant.type != java::constant_type_t::j_string_data)
continue;
const std::string &str = constant.str_data;
qDebug() << QString::fromStdString(str);
if (str.compare(0, 20, "Minecraft Minecraft ") == 0)
{
version = str.substr(20).data();
break;
}
}
}
catch (const java::classfile_exception &) { }
// clean up
delete[] classfile;
Minecraft.close();
zip.close();
jar.close();
return version;
}
}

232
libraries/classparser/src/constants.h
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@ -1,232 +0,0 @@
#pragma once
#include "errors.h"
#include "membuffer.h"
#include <sstream>
namespace java
{
enum class constant_type_t : uint8_t
{
j_hole = 0, // HACK: this is a hole in the array, because java is crazy
j_string_data = 1,
j_int = 3,
j_float = 4,
j_long = 5,
j_double = 6,
j_class = 7,
j_string = 8,
j_fieldref = 9,
j_methodref = 10,
j_interface_methodref = 11,
j_nameandtype = 12
// FIXME: missing some constant types, see https://docs.oracle.com/javase/specs/jvms/se7/html/jvms-4.html#jvms-4.4
};
struct ref_type_t
{
/**
* Class reference:
* an index within the constant pool to a UTF-8 string containing
* the fully qualified class name (in internal format)
* Used for j_class, j_fieldref, j_methodref and j_interface_methodref
*/
uint16_t class_idx;
// used for j_fieldref, j_methodref and j_interface_methodref
uint16_t name_and_type_idx;
};
struct name_and_type_t
{
uint16_t name_index;
uint16_t descriptor_index;
};
class constant
{
public:
constant_type_t type = constant_type_t::j_hole;
constant(util::membuffer &buf)
{
buf.read(type);
// load data depending on type
switch (type)
{
case constant_type_t::j_float:
buf.read_be(data.int_data);
break;
case constant_type_t::j_int:
buf.read_be(data.int_data); // same as float data really
break;
case constant_type_t::j_double:
buf.read_be(data.long_data);
break;
case constant_type_t::j_long:
buf.read_be(data.long_data); // same as double
break;
case constant_type_t::j_class:
buf.read_be(data.ref_type.class_idx);
break;
case constant_type_t::j_fieldref:
case constant_type_t::j_methodref:
case constant_type_t::j_interface_methodref:
buf.read_be(data.ref_type.class_idx);
buf.read_be(data.ref_type.name_and_type_idx);
break;
case constant_type_t::j_string:
buf.read_be(data.index);
break;
case constant_type_t::j_string_data:
// HACK HACK: for now, we call these UTF-8 and do no further processing.
// Later, we should do some decoding. It's really modified UTF-8
// * U+0000 is represented as 0xC0,0x80 invalid character
// * any single zero byte ends the string
// * characters above U+10000 are encoded like in CESU-8
buf.read_jstr(str_data);
break;
case constant_type_t::j_nameandtype:
buf.read_be(data.name_and_type.name_index);
buf.read_be(data.name_and_type.descriptor_index);
break;
default:
// invalid constant type!
throw classfile_exception();
}
}
constant(int)
{
}
std::string toString()
{
std::ostringstream ss;
switch (type)
{
case constant_type_t::j_hole:
ss << "Fake legacy entry";
break;
case constant_type_t::j_float:
ss << "Float: " << data.float_data;
break;
case constant_type_t::j_double:
ss << "Double: " << data.double_data;
break;
case constant_type_t::j_int:
ss << "Int: " << data.int_data;
break;
case constant_type_t::j_long:
ss << "Long: " << data.long_data;
break;
case constant_type_t::j_string_data:
ss << "StrData: " << str_data;
break;
case constant_type_t::j_string:
ss << "Str: " << data.index;
break;
case constant_type_t::j_fieldref:
ss << "FieldRef: " << data.ref_type.class_idx << " " << data.ref_type.name_and_type_idx;
break;
case constant_type_t::j_methodref:
ss << "MethodRef: " << data.ref_type.class_idx << " " << data.ref_type.name_and_type_idx;
break;
case constant_type_t::j_interface_methodref:
ss << "IfMethodRef: " << data.ref_type.class_idx << " " << data.ref_type.name_and_type_idx;
break;
case constant_type_t::j_class:
ss << "Class: " << data.ref_type.class_idx;
break;
case constant_type_t::j_nameandtype:
ss << "NameAndType: " << data.name_and_type.name_index << " "
<< data.name_and_type.descriptor_index;
break;
default:
ss << "Invalid entry (" << int(type) << ")";
break;
}
return ss.str();
}
std::string str_data; /** String data in 'modified utf-8'.*/
// store everything here.
union
{
int32_t int_data;
int64_t long_data;
float float_data;
double double_data;
uint16_t index;
ref_type_t ref_type;
name_and_type_t name_and_type;
} data = {0};
};
/**
* A helper class that represents the custom container used in Java class file for storage of
* constants
*/
class constant_pool
{
public:
/**
* Create a pool of constants
*/
constant_pool()
{
}
/**
* Load a java constant pool
*/
void load(util::membuffer &buf)
{
// FIXME: @SANITY this should check for the end of buffer.
uint16_t length = 0;
buf.read_be(length);
length--;
const constant *last_constant = nullptr;
while (length)
{
const constant &cnst = constant(buf);
constants.push_back(cnst);
last_constant = &constants[constants.size() - 1];
if (last_constant->type == constant_type_t::j_double ||
last_constant->type == constant_type_t::j_long)
{
// push in a fake constant to preserve indexing
constants.push_back(constant(0));
length -= 2;
}
else
{
length--;
}
}
}
typedef std::vector<java::constant> container_type;
/**
* Access constants based on jar file index numbers (index of the first element is 1)
*/
java::constant &operator[](std::size_t constant_index)
{
if (constant_index == 0 || constant_index > constants.size())
{
throw classfile_exception();
}
return constants[constant_index - 1];
}
;
container_type::const_iterator begin() const
{
return constants.begin();
}
;
container_type::const_iterator end() const
{
return constants.end();
}
private:
container_type constants;
};
}

8
libraries/classparser/src/errors.h
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@ -1,8 +0,0 @@
#pragma once
#include <exception>
namespace java
{
class classfile_exception : public std::exception
{
};
}

59
libraries/classparser/src/javaendian.h
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@ -1,59 +0,0 @@
#pragma once
#include <stdint.h>
/**
* Swap bytes between big endian and local number representation
*/
namespace util
{
#ifdef MULTIMC_BIG_ENDIAN
inline uint64_t bigswap(uint64_t x)
{
return x;
}
inline uint32_t bigswap(uint32_t x)
{
return x;
}
inline uint16_t bigswap(uint16_t x)
{
return x;
}
#else
inline uint64_t bigswap(uint64_t x)
{
return (x >> 56) | ((x << 40) & 0x00FF000000000000) | ((x << 24) & 0x0000FF0000000000) |
((x << 8) & 0x000000FF00000000) | ((x >> 8) & 0x00000000FF000000) |
((x >> 24) & 0x0000000000FF0000) | ((x >> 40) & 0x000000000000FF00) | (x << 56);
}
inline uint32_t bigswap(uint32_t x)
{
return (x >> 24) | ((x << 8) & 0x00FF0000) | ((x >> 8) & 0x0000FF00) | (x << 24);
}
inline uint16_t bigswap(uint16_t x)
{
return (x >> 8) | (x << 8);
}
#endif
inline int64_t bigswap(int64_t x)
{
return static_cast<int64_t>(bigswap(static_cast<uint64_t>(x)));
}
inline int32_t bigswap(int32_t x)
{
return static_cast<int32_t>(bigswap(static_cast<uint32_t>(x)));
}
inline int16_t bigswap(int16_t x)
{
return static_cast<int16_t>(bigswap(static_cast<uint16_t>(x)));
}
}

63
libraries/classparser/src/membuffer.h
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#pragma once
#include <stdint.h>
#include <string>
#include <vector>
#include <exception>
#include "javaendian.h"
namespace util
{
class membuffer
{
public:
membuffer(char *buffer, std::size_t size)
{
current = start = buffer;
end = start + size;
}
~membuffer()
{
// maybe? possibly? left out to avoid confusion. for now.
// delete start;
}
/**
* Read some value. That's all ;)
*/
template <class T> void read(T &val)
{
val = *(T *)current;
current += sizeof(T);
}
/**
* Read a big-endian number
* valid for 2-byte, 4-byte and 8-byte variables
*/
template <class T> void read_be(T &val)
{
val = util::bigswap(*(T *)current);
current += sizeof(T);
}
/**
* Read a string in the format:
* 2B length (big endian, unsigned)
* length bytes data
*/
void read_jstr(std::string &str)
{
uint16_t length = 0;
read_be(length);
str.append(current, length);
current += length;
}
/**
* Skip N bytes
*/
void skip(std::size_t N)
{
current += N;
}
private:
char *start, *end, *current;
};
}

26
libraries/xz-embedded/CMakeLists.txt
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cmake_minimum_required(VERSION 3.9.4)
project(xz-embedded LANGUAGES C)
option(XZ_BUILD_BCJ "Build xz-embedded with BCJ support (native binary optimization)" OFF)
option(XZ_BUILD_CRC64 "Build xz-embedded with CRC64 checksum support" ON)
option(XZ_BUILD_MINIDEC "Build a tiny utility that decompresses xz streams" OFF)
# See include/xz.h for manual feature configuration
# tweak this list and xz.h to fit your needs
set(XZ_SOURCES
src/xz_crc32.c
src/xz_crc64.c
src/xz_dec_lzma2.c
src/xz_dec_stream.c
# src/xz_dec_bcj.c
)
add_library(xz-embedded STATIC ${XZ_SOURCES})
target_include_directories(xz-embedded PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}/include")
set_property(TARGET xz-embedded PROPERTY C_STANDARD 99)
if(${XZ_BUILD_MINIDEC})
add_executable(xzminidec xzminidec.c)
target_link_libraries(xzminidec xz-embedded)
set_property(TARGET xzminidec PROPERTY C_STANDARD 99)
endif()

321
libraries/xz-embedded/include/xz.h
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/*
* XZ decompressor
*
* Authors: Lasse Collin <lasse.collin@tukaani.org>
* Igor Pavlov <http://7-zip.org/>
*
* This file has been put into the public domain.
* You can do whatever you want with this file.
*/
#ifndef XZ_H
#define XZ_H
#ifdef __KERNEL__
#include <linux/stddef.h>
#include <linux/types.h>
#else
#include <stddef.h>
#include <stdint.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
/* Definitions that determine available features */
#define XZ_DEC_ANY_CHECK 1
#define XZ_USE_CRC64 1
// native machine code compression stuff
/*
#define XZ_DEC_X86
#define XZ_DEC_POWERPC
#define XZ_DEC_IA64
#define XZ_DEC_ARM
#define XZ_DEC_ARMTHUMB
#define XZ_DEC_SPARC
*/
/* In Linux, this is used to make extern functions static when needed. */
#ifndef XZ_EXTERN
#define XZ_EXTERN extern
#endif
/**
* enum xz_mode - Operation mode
*
* @XZ_SINGLE: Single-call mode. This uses less RAM than
* than multi-call modes, because the LZMA2
* dictionary doesn't need to be allocated as
* part of the decoder state. All required data
* structures are allocated at initialization,
* so xz_dec_run() cannot return XZ_MEM_ERROR.
* @XZ_PREALLOC: Multi-call mode with preallocated LZMA2
* dictionary buffer. All data structures are
* allocated at initialization, so xz_dec_run()
* cannot return XZ_MEM_ERROR.
* @XZ_DYNALLOC: Multi-call mode. The LZMA2 dictionary is
* allocated once the required size has been
* parsed from the stream headers. If the
* allocation fails, xz_dec_run() will return
* XZ_MEM_ERROR.
*
* It is possible to enable support only for a subset of the above
* modes at compile time by defining XZ_DEC_SINGLE, XZ_DEC_PREALLOC,
* or XZ_DEC_DYNALLOC. The xz_dec kernel module is always compiled
* with support for all operation modes, but the preboot code may
* be built with fewer features to minimize code size.
*/
enum xz_mode
{
XZ_SINGLE,
XZ_PREALLOC,
XZ_DYNALLOC
};
/**
* enum xz_ret - Return codes
* @XZ_OK: Everything is OK so far. More input or more
* output space is required to continue. This
* return code is possible only in multi-call mode
* (XZ_PREALLOC or XZ_DYNALLOC).
* @XZ_STREAM_END: Operation finished successfully.
* @XZ_UNSUPPORTED_CHECK: Integrity check type is not supported. Decoding
* is still possible in multi-call mode by simply
* calling xz_dec_run() again.
* Note that this return value is used only if
* XZ_DEC_ANY_CHECK was defined at build time,
* which is not used in the kernel. Unsupported
* check types return XZ_OPTIONS_ERROR if
* XZ_DEC_ANY_CHECK was not defined at build time.
* @XZ_MEM_ERROR: Allocating memory failed. This return code is
* possible only if the decoder was initialized
* with XZ_DYNALLOC. The amount of memory that was
* tried to be allocated was no more than the
* dict_max argument given to xz_dec_init().
* @XZ_MEMLIMIT_ERROR: A bigger LZMA2 dictionary would be needed than
* allowed by the dict_max argument given to
* xz_dec_init(). This return value is possible
* only in multi-call mode (XZ_PREALLOC or
* XZ_DYNALLOC); the single-call mode (XZ_SINGLE)
* ignores the dict_max argument.
* @XZ_FORMAT_ERROR: File format was not recognized (wrong magic
* bytes).
* @XZ_OPTIONS_ERROR: This implementation doesn't support the requested
* compression options. In the decoder this means
* that the header CRC32 matches, but the header
* itself specifies something that we don't support.
* @XZ_DATA_ERROR: Compressed data is corrupt.
* @XZ_BUF_ERROR: Cannot make any progress. Details are slightly
* different between multi-call and single-call
* mode; more information below.
*
* In multi-call mode, XZ_BUF_ERROR is returned when two consecutive calls
* to XZ code cannot consume any input and cannot produce any new output.
* This happens when there is no new input available, or the output buffer
* is full while at least one output byte is still pending. Assuming your
* code is not buggy, you can get this error only when decoding a compressed
* stream that is truncated or otherwise corrupt.
*
* In single-call mode, XZ_BUF_ERROR is returned only when the output buffer
* is too small or the compressed input is corrupt in a way that makes the
* decoder produce more output than the caller expected. When it is
* (relatively) clear that the compressed input is truncated, XZ_DATA_ERROR
* is used instead of XZ_BUF_ERROR.
*/
enum xz_ret
{
XZ_OK,
XZ_STREAM_END,
XZ_UNSUPPORTED_CHECK,
XZ_MEM_ERROR,
XZ_MEMLIMIT_ERROR,
XZ_FORMAT_ERROR,
XZ_OPTIONS_ERROR,
XZ_DATA_ERROR,
XZ_BUF_ERROR
};
/**
* struct xz_buf - Passing input and output buffers to XZ code
* @in: Beginning of the input buffer. This may be NULL if and only
* if in_pos is equal to in_size.
* @in_pos: Current position in the input buffer. This must not exceed
* in_size.
* @in_size: Size of the input buffer
* @out: Beginning of the output buffer. This may be NULL if and only
* if out_pos is equal to out_size.
* @out_pos: Current position in the output buffer. This must not exceed
* out_size.
* @out_size: Size of the output buffer
*
* Only the contents of the output buffer from out[out_pos] onward, and
* the variables in_pos and out_pos are modified by the XZ code.
*/
struct xz_buf
{
const uint8_t *in;
size_t in_pos;
size_t in_size;
uint8_t *out;
size_t out_pos;
size_t out_size;
};
/**
* struct xz_dec - Opaque type to hold the XZ decoder state
*/
struct xz_dec;
/**
* xz_dec_init() - Allocate and initialize a XZ decoder state
* @mode: Operation mode
* @dict_max: Maximum size of the LZMA2 dictionary (history buffer) for
* multi-call decoding. This is ignored in single-call mode
* (mode == XZ_SINGLE). LZMA2 dictionary is always 2^n bytes
* or 2^n + 2^(n-1) bytes (the latter sizes are less common
* in practice), so other values for dict_max don't make sense.
* In the kernel, dictionary sizes of 64 KiB, 128 KiB, 256 KiB,
* 512 KiB, and 1 MiB are probably the only reasonable values,
* except for kernel and initramfs images where a bigger
* dictionary can be fine and useful.
*
* Single-call mode (XZ_SINGLE): xz_dec_run() decodes the whole stream at
* once. The caller must provide enough output space or the decoding will
* fail. The output space is used as the dictionary buffer, which is why
* there is no need to allocate the dictionary as part of the decoder's
* internal state.
*
* Because the output buffer is used as the workspace, streams encoded using
* a big dictionary are not a problem in single-call mode. It is enough that
* the output buffer is big enough to hold the actual uncompressed data; it
* can be smaller than the dictionary size stored in the stream headers.
*
* Multi-call mode with preallocated dictionary (XZ_PREALLOC): dict_max bytes
* of memory is preallocated for the LZMA2 dictionary. This way there is no
* risk that xz_dec_run() could run out of memory, since xz_dec_run() will
* never allocate any memory. Instead, if the preallocated dictionary is too
* small for decoding the given input stream, xz_dec_run() will return
* XZ_MEMLIMIT_ERROR. Thus, it is important to know what kind of data will be
* decoded to avoid allocating excessive amount of memory for the dictionary.
*
* Multi-call mode with dynamically allocated dictionary (XZ_DYNALLOC):
* dict_max specifies the maximum allowed dictionary size that xz_dec_run()
* may allocate once it has parsed the dictionary size from the stream
* headers. This way excessive allocations can be avoided while still
* limiting the maximum memory usage to a sane value to prevent running the
* system out of memory when decompressing streams from untrusted sources.
*
* On success, xz_dec_init() returns a pointer to struct xz_dec, which is
* ready to be used with xz_dec_run(). If memory allocation fails,
* xz_dec_init() returns NULL.
*/
XZ_EXTERN struct xz_dec *xz_dec_init(enum xz_mode mode, uint32_t dict_max);
/**
* xz_dec_run() - Run the XZ decoder
* @s: Decoder state allocated using xz_dec_init()
* @b: Input and output buffers
*
* The possible return values depend on build options and operation mode.
* See enum xz_ret for details.
*
* Note that if an error occurs in single-call mode (return value is not
* XZ_STREAM_END), b->in_pos and b->out_pos are not modified and the
* contents of the output buffer from b->out[b->out_pos] onward are
* undefined. This is true even after XZ_BUF_ERROR, because with some filter
* chains, there may be a second pass over the output buffer, and this pass
* cannot be properly done if the output buffer is truncated. Thus, you
* cannot give the single-call decoder a too small buffer and then expect to
* get that amount valid data from the beginning of the stream. You must use
* the multi-call decoder if you don't want to uncompress the whole stream.
*/
XZ_EXTERN enum xz_ret xz_dec_run(struct xz_dec *s, struct xz_buf *b);
/**
* xz_dec_reset() - Reset an already allocated decoder state
* @s: Decoder state allocated using xz_dec_init()
*
* This function can be used to reset the multi-call decoder state without
* freeing and reallocating memory with xz_dec_end() and xz_dec_init().
*
* In single-call mode, xz_dec_reset() is always called in the beginning of
* xz_dec_run(). Thus, explicit call to xz_dec_reset() is useful only in
* multi-call mode.
*/
XZ_EXTERN void xz_dec_reset(struct xz_dec *s);
/**
* xz_dec_end() - Free the memory allocated for the decoder state
* @s: Decoder state allocated using xz_dec_init(). If s is NULL,
* this function does nothing.
*/
XZ_EXTERN void xz_dec_end(struct xz_dec *s);
/*
* Standalone build (userspace build or in-kernel build for boot time use)
* needs a CRC32 implementation. For normal in-kernel use, kernel's own
* CRC32 module is used instead, and users of this module don't need to
* care about the functions below.
*/
#ifndef XZ_INTERNAL_CRC32
#ifdef __KERNEL__
#define XZ_INTERNAL_CRC32 0
#else
#define XZ_INTERNAL_CRC32 1
#endif
#endif
/*
* If CRC64 support has been enabled with XZ_USE_CRC64, a CRC64
* implementation is needed too.
*/
#ifndef XZ_USE_CRC64
#undef XZ_INTERNAL_CRC64
#define XZ_INTERNAL_CRC64 0
#endif
#ifndef XZ_INTERNAL_CRC64
#ifdef __KERNEL__
#error Using CRC64 in the kernel has not been implemented.
#else
#define XZ_INTERNAL_CRC64 1
#endif
#endif
#if XZ_INTERNAL_CRC32
/*
* This must be called before any other xz_* function to initialize
* the CRC32 lookup table.
*/
XZ_EXTERN void xz_crc32_init(void);
/*
* Update CRC32 value using the polynomial from IEEE-802.3. To start a new
* calculation, the third argument must be zero. To continue the calculation,
* the previously returned value is passed as the third argument.
*/
XZ_EXTERN uint32_t xz_crc32(const uint8_t *buf, size_t size, uint32_t crc);
#endif
#if XZ_INTERNAL_CRC64
/*
* This must be called before any other xz_* function (except xz_crc32_init())
* to initialize the CRC64 lookup table.
*/
XZ_EXTERN void xz_crc64_init(void);
/*
* Update CRC64 value using the polynomial from ECMA-182. To start a new
* calculation, the third argument must be zero. To continue the calculation,
* the previously returned value is passed as the third argument.
*/
XZ_EXTERN uint64_t xz_crc64(const uint8_t *buf, size_t size, uint64_t crc);
#endif
#ifdef __cplusplus
}
#endif
#endif

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libraries/xz-embedded/src/xz_config.h
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/*
* Private includes and definitions for userspace use of XZ Embedded
*
* Author: Lasse Collin <lasse.collin@tukaani.org>
*
* This file has been put into the public domain.
* You can do whatever you want with this file.
*/
#ifndef XZ_CONFIG_H
#define XZ_CONFIG_H
/* Uncomment to enable CRC64 support. */
/* #define XZ_USE_CRC64 */
/* Uncomment as needed to enable BCJ filter decoders. */
/* #define XZ_DEC_X86 */
/* #define XZ_DEC_POWERPC */
/* #define XZ_DEC_IA64 */
/* #define XZ_DEC_ARM */
/* #define XZ_DEC_ARMTHUMB */
/* #define XZ_DEC_SPARC */
/*
* MSVC doesn't support modern C but XZ Embedded is mostly C89
* so these are enough.
*/
#ifdef _MSC_VER
typedef unsigned char bool;
#define true 1
#define false 0
#define inline __inline
#else
#include <stdbool.h>
#endif
#include <stdlib.h>
#include <string.h>
#include "xz.h"
#define kmalloc(size, flags) malloc(size)
#define kfree(ptr) free(ptr)
#define vmalloc(size) malloc(size)
#define vfree(ptr) free(ptr)
#define memeq(a, b, size) (memcmp(a, b, size) == 0)
#define memzero(buf, size) memset(buf, 0, size)
#ifndef min
#define min(x, y) ((x) < (y) ? (x) : (y))
#endif
#define min_t(type, x, y) min(x, y)
/*
* Some functions have been marked with __always_inline to keep the
* performance reasonable even when the compiler is optimizing for
* small code size. You may be able to save a few bytes by #defining
* __always_inline to plain inline, but don't complain if the code
* becomes slow.
*
* NOTE: System headers on GNU/Linux may #define this macro already,
* so if you want to change it, you need to #undef it first.
*/
#ifndef __always_inline
#ifdef __GNUC__
#define __always_inline inline __attribute__((__always_inline__))
#else
#define __always_inline inline
#endif
#endif
/* Inline functions to access unaligned unsigned 32-bit integers */
#ifndef get_unaligned_le32
static inline uint32_t get_unaligned_le32(const uint8_t *buf)
{
return (uint32_t)buf[0] | ((uint32_t)buf[1] << 8) | ((uint32_t)buf[2] << 16) |
((uint32_t)buf[3] << 24);
}
#endif
#ifndef get_unaligned_be32
static inline uint32_t get_unaligned_be32(const uint8_t *buf)
{
return (uint32_t)(buf[0] << 24) | ((uint32_t)buf[1] << 16) | ((uint32_t)buf[2] << 8) |
(uint32_t)buf[3];
}
#endif
#ifndef put_unaligned_le32
static inline void put_unaligned_le32(uint32_t val, uint8_t *buf)
{
buf[0] = (uint8_t)val;
buf[1] = (uint8_t)(val >> 8);
buf[2] = (uint8_t)(val >> 16);
buf[3] = (uint8_t)(val >> 24);
}
#endif
#ifndef put_unaligned_be32
static inline void put_unaligned_be32(uint32_t val, uint8_t *buf)
{
buf[0] = (uint8_t)(val >> 24);
buf[1] = (uint8_t)(val >> 16);
buf[2] = (uint8_t)(val >> 8);
buf[3] = (uint8_t)val;
}
#endif
/*
* Use get_unaligned_le32() also for aligned access for simplicity. On
* little endian systems, #define get_le32(ptr) (*(const uint32_t *)(ptr))
* could save a few bytes in code size.
*/
#ifndef get_le32
#define get_le32 get_unaligned_le32
#endif
#endif

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libraries/xz-embedded/src/xz_crc32.c
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/*
* CRC32 using the polynomial from IEEE-802.3
*
* Authors: Lasse Collin <lasse.collin@tukaani.org>
* Igor Pavlov <http://7-zip.org/>
*
* This file has been put into the public domain.
* You can do whatever you want with this file.
*/
/*
* This is not the fastest implementation, but it is pretty compact.
* The fastest versions of xz_crc32() on modern CPUs without hardware
* accelerated CRC instruction are 3-5 times as fast as this version,
* but they are bigger and use more memory for the lookup table.
*/
#include "xz_private.h"
/*
* STATIC_RW_DATA is used in the pre-boot environment on some architectures.
* See <linux/decompress/mm.h> for details.
*/
#ifndef STATIC_RW_DATA
#define STATIC_RW_DATA static
#endif
STATIC_RW_DATA uint32_t xz_crc32_table[256];
XZ_EXTERN void xz_crc32_init(void)
{
const uint32_t poly = 0xEDB88320;
uint32_t i;
uint32_t j;
uint32_t r;
for (i = 0; i < 256; ++i)
{
r = i;
for (j = 0; j < 8; ++j)
r = (r >> 1) ^ (poly & ~((r & 1) - 1));
xz_crc32_table[i] = r;
}
return;
}
XZ_EXTERN uint32_t xz_crc32(const uint8_t *buf, size_t size, uint32_t crc)
{
crc = ~crc;
while (size != 0)
{
crc = xz_crc32_table[*buf++ ^ (crc & 0xFF)] ^ (crc >> 8);
--size;
}
return ~crc;
}

52
libraries/xz-embedded/src/xz_crc64.c
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@ -1,52 +0,0 @@
/*
* CRC64 using the polynomial from ECMA-182
*
* This file is similar to xz_crc32.c. See the comments there.
*
* Authors: Lasse Collin <lasse.collin@tukaani.org>
* Igor Pavlov <http://7-zip.org/>
*
* This file has been put into the public domain.
* You can do whatever you want with this file.
*/
#include "xz_private.h"
#ifndef STATIC_RW_DATA
#define STATIC_RW_DATA static
#endif
STATIC_RW_DATA uint64_t xz_crc64_table[256];
XZ_EXTERN void xz_crc64_init(void)
{
const uint64_t poly = 0xC96C5795D7870F42;
uint32_t i;
uint32_t j;
uint64_t r;
for (i = 0; i < 256; ++i)
{
r = i;
for (j = 0; j < 8; ++j)
r = (r >> 1) ^ (poly & ~((r & 1) - 1));
xz_crc64_table[i] = r;
}
return;
}
XZ_EXTERN uint64_t xz_crc64(const uint8_t *buf, size_t size, uint64_t crc)
{
crc = ~crc;
while (size != 0)
{
crc = xz_crc64_table[*buf++ ^ (crc & 0xFF)] ^ (crc >> 8);
--size;
}
return ~crc;
}

588
libraries/xz-embedded/src/xz_dec_bcj.c
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@ -1,588 +0,0 @@
/*
* Branch/Call/Jump (BCJ) filter decoders
*
* Authors: Lasse Collin <lasse.collin@tukaani.org>
* Igor Pavlov <http://7-zip.org/>
*
* This file has been put into the public domain.
* You can do whatever you want with this file.
*/
#include "xz_private.h"
/*
* The rest of the file is inside this ifdef. It makes things a little more
* convenient when building without support for any BCJ filters.
*/
#ifdef XZ_DEC_BCJ
struct xz_dec_bcj
{
/* Type of the BCJ filter being used */
enum
{
BCJ_X86 = 4, /* x86 or x86-64 */
BCJ_POWERPC = 5, /* Big endian only */
BCJ_IA64 = 6, /* Big or little endian */
BCJ_ARM = 7, /* Little endian only */
BCJ_ARMTHUMB = 8, /* Little endian only */
BCJ_SPARC = 9 /* Big or little endian */
} type;
/*
* Return value of the next filter in the chain. We need to preserve
* this information across calls, because we must not call the next
* filter anymore once it has returned XZ_STREAM_END.
*/
enum xz_ret ret;
/* True if we are operating in single-call mode. */
bool single_call;
/*
* Absolute position relative to the beginning of the uncompressed
* data (in a single .xz Block). We care only about the lowest 32
* bits so this doesn't need to be uint64_t even with big files.
*/
uint32_t pos;
/* x86 filter state */
uint32_t x86_prev_mask;
/* Temporary space to hold the variables from struct xz_buf */
uint8_t *out;
size_t out_pos;
size_t out_size;
struct
{
/* Amount of already filtered data in the beginning of buf */
size_t filtered;
/* Total amount of data currently stored in buf */
size_t size;
/*
* Buffer to hold a mix of filtered and unfiltered data. This
* needs to be big enough to hold Alignment + 2 * Look-ahead:
*
* Type Alignment Look-ahead
* x86 1 4
* PowerPC 4 0
* IA-64 16 0
* ARM 4 0
* ARM-Thumb 2 2
* SPARC 4 0
*/
uint8_t buf[16];
} temp;
};
#ifdef XZ_DEC_X86
/*
* This is used to test the most significant byte of a memory address
* in an x86 instruction.
*/
static inline int bcj_x86_test_msbyte(uint8_t b)
{
return b == 0x00 || b == 0xFF;
}
static size_t bcj_x86(struct xz_dec_bcj *s, uint8_t *buf, size_t size)
{
static const bool mask_to_allowed_status[8] = {true, true, true, false,
true, false, false, false};
static const uint8_t mask_to_bit_num[8] = {0, 1, 2, 2, 3, 3, 3, 3};
size_t i;
size_t prev_pos = (size_t) - 1;
uint32_t prev_mask = s->x86_prev_mask;
uint32_t src;
uint32_t dest;
uint32_t j;
uint8_t b;
if (size <= 4)
return 0;
size -= 4;
for (i = 0; i < size; ++i)
{
if ((buf[i] & 0xFE) != 0xE8)
continue;
prev_pos = i - prev_pos;
if (prev_pos > 3)
{
prev_mask = 0;
}
else
{
prev_mask = (prev_mask << (prev_pos - 1)) & 7;
if (prev_mask != 0)
{
b = buf[i + 4 - mask_to_bit_num[prev_mask]];
if (!mask_to_allowed_status[prev_mask] || bcj_x86_test_msbyte(b))
{
prev_pos = i;
prev_mask = (prev_mask << 1) | 1;
continue;
}
}
}
prev_pos = i;
if (bcj_x86_test_msbyte(buf[i + 4]))
{
src = get_unaligned_le32(buf + i + 1);
while (true)
{
dest = src - (s->pos + (uint32_t)i + 5);
if (prev_mask == 0)
break;
j = mask_to_bit_num[prev_mask] * 8;
b = (uint8_t)(dest >> (24 - j));
if (!bcj_x86_test_msbyte(b))
break;
src = dest ^ (((uint32_t)1 << (32 - j)) - 1);
}
dest &= 0x01FFFFFF;
dest |= (uint32_t)0 - (dest & 0x01000000);
put_unaligned_le32(dest, buf + i + 1);
i += 4;
}
else
{
prev_mask = (prev_mask << 1) | 1;
}
}
prev_pos = i - prev_pos;
s->x86_prev_mask = prev_pos > 3 ? 0 : prev_mask << (prev_pos - 1);
return i;
}
#endif
#ifdef XZ_DEC_POWERPC
static size_t bcj_powerpc(struct xz_dec_bcj *s, uint8_t *buf, size_t size)
{
size_t i;
uint32_t instr;
for (i = 0; i + 4 <= size; i += 4)
{
instr = get_unaligned_be32(buf + i);
if ((instr & 0xFC000003) == 0x48000001)
{
instr &= 0x03FFFFFC;
instr -= s->pos + (uint32_t)i;
instr &= 0x03FFFFFC;
instr |= 0x48000001;
put_unaligned_be32(instr, buf + i);
}
}
return i;
}
#endif
#ifdef XZ_DEC_IA64
static size_t bcj_ia64(struct xz_dec_bcj *s, uint8_t *buf, size_t size)
{
static const uint8_t branch_table[32] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
4, 4, 6, 6, 0, 0, 7, 7, 4, 4, 0, 0, 4, 4, 0, 0};
/*
* The local variables take a little bit stack space, but it's less
* than what LZMA2 decoder takes, so it doesn't make sense to reduce
* stack usage here without doing that for the LZMA2 decoder too.
*/
/* Loop counters */
size_t i;
size_t j;
/* Instruction slot (0, 1, or 2) in the 128-bit instruction word */
uint32_t slot;
/* Bitwise offset of the instruction indicated by slot */
uint32_t bit_pos;
/* bit_pos split into byte and bit parts */
uint32_t byte_pos;
uint32_t bit_res;
/* Address part of an instruction */
uint32_t addr;
/* Mask used to detect which instructions to convert */
uint32_t mask;
/* 41-bit instruction stored somewhere in the lowest 48 bits */
uint64_t instr;
/* Instruction normalized with bit_res for easier manipulation */
uint64_t norm;
for (i = 0; i + 16 <= size; i += 16)
{
mask = branch_table[buf[i] & 0x1F];
for (slot = 0, bit_pos = 5; slot < 3; ++slot, bit_pos += 41)
{
if (((mask >> slot) & 1) == 0)
continue;
byte_pos = bit_pos >> 3;
bit_res = bit_pos & 7;
instr = 0;
for (j = 0; j < 6; ++j)
instr |= (uint64_t)(buf[i + j + byte_pos]) << (8 * j);
norm = instr >> bit_res;
if (((norm >> 37) & 0x0F) == 0x05 && ((norm >> 9) & 0x07) == 0)
{
addr = (norm >> 13) & 0x0FFFFF;
addr |= ((uint32_t)(norm >> 36) & 1) << 20;
addr <<= 4;
addr -= s->pos + (uint32_t)i;
addr >>= 4;
norm &= ~((uint64_t)0x8FFFFF << 13);
norm |= (uint64_t)(addr & 0x0FFFFF) << 13;
norm |= (uint64_t)(addr & 0x100000) << (36 - 20);
instr &= (1 << bit_res) - 1;
instr |= norm << bit_res;
for (j = 0; j < 6; j++)
buf[i + j + byte_pos] = (uint8_t)(instr >> (8 * j));
}
}
}
return i;
}
#endif
#ifdef XZ_DEC_ARM
static size_t bcj_arm(struct xz_dec_bcj *s, uint8_t *buf, size_t size)
{
size_t i;
uint32_t addr;
for (i = 0; i + 4 <= size; i += 4)
{
if (buf[i + 3] == 0xEB)
{
addr =
(uint32_t)buf[i] | ((uint32_t)buf[i + 1] << 8) | ((uint32_t)buf[i + 2] << 16);
addr <<= 2;
addr -= s->pos + (uint32_t)i + 8;
addr >>= 2;
buf[i] = (uint8_t)addr;
buf[i + 1] = (uint8_t)(addr >> 8);
buf[i + 2] = (uint8_t)(addr >> 16);
}
}
return i;
}
#endif
#ifdef XZ_DEC_ARMTHUMB
static size_t bcj_armthumb(struct xz_dec_bcj *s, uint8_t *buf, size_t size)
{
size_t i;
uint32_t addr;
for (i = 0; i + 4 <= size; i += 2)
{
if ((buf[i + 1] & 0xF8) == 0xF0 && (buf[i + 3] & 0xF8) == 0xF8)
{
addr = (((uint32_t)buf[i + 1] & 0x07) << 19) | ((uint32_t)buf[i] << 11) |
(((uint32_t)buf[i + 3] & 0x07) << 8) | (uint32_t)buf[i + 2];
addr <<= 1;
addr -= s->pos + (uint32_t)i + 4;
addr >>= 1;
buf[i + 1] = (uint8_t)(0xF0 | ((addr >> 19) & 0x07));
buf[i] = (uint8_t)(addr >> 11);
buf[i + 3] = (uint8_t)(0xF8 | ((addr >> 8) & 0x07));
buf[i + 2] = (uint8_t)addr;
i += 2;
}
}
return i;
}
#endif
#ifdef XZ_DEC_SPARC
static size_t bcj_sparc(struct xz_dec_bcj *s, uint8_t *buf, size_t size)
{
size_t i;
uint32_t instr;
for (i = 0; i + 4 <= size; i += 4)
{
instr = get_unaligned_be32(buf + i);
if ((instr >> 22) == 0x100 || (instr >> 22) == 0x1FF)
{
instr <<= 2;
instr -= s->pos + (uint32_t)i;
instr >>= 2;
instr =
((uint32_t)0x40000000 - (instr & 0x400000)) | 0x40000000 | (instr & 0x3FFFFF);
put_unaligned_be32(instr, buf + i);
}
}
return i;
}
#endif
/*
* Apply the selected BCJ filter. Update *pos and s->pos to match the amount
* of data that got filtered.
*
* NOTE: This is implemented as a switch statement to avoid using function
* pointers, which could be problematic in the kernel boot code, which must
* avoid pointers to static data (at least on x86).
*/
static void bcj_apply(struct xz_dec_bcj *s, uint8_t *buf, size_t *pos, size_t size)
{
size_t filtered;
buf += *pos;
size -= *pos;
switch (s->type)
{
#ifdef XZ_DEC_X86
case BCJ_X86:
filtered = bcj_x86(s, buf, size);
break;
#endif
#ifdef XZ_DEC_POWERPC
case BCJ_POWERPC:
filtered = bcj_powerpc(s, buf, size);
break;
#endif
#ifdef XZ_DEC_IA64
case BCJ_IA64:
filtered = bcj_ia64(s, buf, size);
break;
#endif
#ifdef XZ_DEC_ARM
case BCJ_ARM:
filtered = bcj_arm(s, buf, size);
break;
#endif
#ifdef XZ_DEC_ARMTHUMB
case BCJ_ARMTHUMB:
filtered = bcj_armthumb(s, buf, size);
break;
#endif
#ifdef XZ_DEC_SPARC
case BCJ_SPARC:
filtered = bcj_sparc(s, buf, size);
break;
#endif
default:
/* Never reached but silence compiler warnings. */
filtered = 0;
break;
}
*pos += filtered;
s->pos += filtered;
}
/*
* Flush pending filtered data from temp to the output buffer.
* Move the remaining mixture of possibly filtered and unfiltered
* data to the beginning of temp.
*/
static void bcj_flush(struct xz_dec_bcj *s, struct xz_buf *b)
{
size_t copy_size;
copy_size = min_t(size_t, s->temp.filtered, b->out_size - b->out_pos);
memcpy(b->out + b->out_pos, s->temp.buf, copy_size);
b->out_pos += copy_size;
s->temp.filtered -= copy_size;
s->temp.size -= copy_size;
memmove(s->temp.buf, s->temp.buf + copy_size, s->temp.size);
}
/*
* The BCJ filter functions are primitive in sense that they process the
* data in chunks of 1-16 bytes. To hide this issue, this function does
* some buffering.
*/
XZ_EXTERN enum xz_ret xz_dec_bcj_run(struct xz_dec_bcj *s, struct xz_dec_lzma2 *lzma2,
struct xz_buf *b)
{
size_t out_start;
/*
* Flush pending already filtered data to the output buffer. Return
* immediatelly if we couldn't flush everything, or if the next
* filter in the chain had already returned XZ_STREAM_END.
*/
if (s->temp.filtered > 0)
{
bcj_flush(s, b);
if (s->temp.filtered > 0)
return XZ_OK;
if (s->ret == XZ_STREAM_END)
return XZ_STREAM_END;
}
/*
* If we have more output space than what is currently pending in
* temp, copy the unfiltered data from temp to the output buffer
* and try to fill the output buffer by decoding more data from the
* next filter in the chain. Apply the BCJ filter on the new data
* in the output buffer. If everything cannot be filtered, copy it
* to temp and rewind the output buffer position accordingly.
*
* This needs to be always run when temp.size == 0 to handle a special
* case where the output buffer is full and the next filter has no
* more output coming but hasn't returned XZ_STREAM_END yet.
*/
if (s->temp.size < b->out_size - b->out_pos || s->temp.size == 0)
{
out_start = b->out_pos;
memcpy(b->out + b->out_pos, s->temp.buf, s->temp.size);
b->out_pos += s->temp.size;
s->ret = xz_dec_lzma2_run(lzma2, b);
if (s->ret != XZ_STREAM_END && (s->ret != XZ_OK || s->single_call))
return s->ret;
bcj_apply(s, b->out, &out_start, b->out_pos);
/*
* As an exception, if the next filter returned XZ_STREAM_END,
* we can do that too, since the last few bytes that remain
* unfiltered are meant to remain unfiltered.
*/
if (s->ret == XZ_STREAM_END)
return XZ_STREAM_END;
s->temp.size = b->out_pos - out_start;
b->out_pos -= s->temp.size;
memcpy(s->temp.buf, b->out + b->out_pos, s->temp.size);
/*
* If there wasn't enough input to the next filter to fill
* the output buffer with unfiltered data, there's no point
* to try decoding more data to temp.
*/
if (b->out_pos + s->temp.size < b->out_size)
return XZ_OK;
}
/*
* We have unfiltered data in temp. If the output buffer isn't full
* yet, try to fill the temp buffer by decoding more data from the
* next filter. Apply the BCJ filter on temp. Then we hopefully can
* fill the actual output buffer by copying filtered data from temp.
* A mix of filtered and unfiltered data may be left in temp; it will
* be taken care on the next call to this function.
*/
if (b->out_pos < b->out_size)
{
/* Make b->out{,_pos,_size} temporarily point to s->temp. */
s->out = b->out;
s->out_pos = b->out_pos;
s->out_size = b->out_size;
b->out = s->temp.buf;
b->out_pos = s->temp.size;
b->out_size = sizeof(s->temp.buf);
s->ret = xz_dec_lzma2_run(lzma2, b);
s->temp.size = b->out_pos;
b->out = s->out;
b->out_pos = s->out_pos;
b->out_size = s->out_size;
if (s->ret != XZ_OK && s->ret != XZ_STREAM_END)
return s->ret;
bcj_apply(s, s->temp.buf, &s->temp.filtered, s->temp.size);
/*
* If the next filter returned XZ_STREAM_END, we mark that
* everything is filtered, since the last unfiltered bytes
* of the stream are meant to be left as is.
*/
if (s->ret == XZ_STREAM_END)
s->temp.filtered = s->temp.size;
bcj_flush(s, b);
if (s->temp.filtered > 0)
return XZ_OK;
}
return s->ret;
}
XZ_EXTERN struct xz_dec_bcj *xz_dec_bcj_create(bool single_call)
{
struct xz_dec_bcj *s = kmalloc(sizeof(*s), GFP_KERNEL);
if (s != NULL)
s->single_call = single_call;
return s;
}
XZ_EXTERN enum xz_ret xz_dec_bcj_reset(struct xz_dec_bcj *s, uint8_t id)
{
switch (id)
{
#ifdef XZ_DEC_X86
case BCJ_X86:
#endif
#ifdef XZ_DEC_POWERPC
case BCJ_POWERPC:
#endif
#ifdef XZ_DEC_IA64
case BCJ_IA64:
#endif
#ifdef XZ_DEC_ARM
case BCJ_ARM:
#endif
#ifdef XZ_DEC_ARMTHUMB
case BCJ_ARMTHUMB:
#endif
#ifdef XZ_DEC_SPARC
case BCJ_SPARC:
#endif
break;
default:
/* Unsupported Filter ID */
return XZ_OPTIONS_ERROR;
}
s->type = id;
s->ret = XZ_OK;
s->pos = 0;
s->x86_prev_mask = 0;
s->temp.filtered = 0;
s->temp.size = 0;
return XZ_OK;
}
#endif

1231
libraries/xz-embedded/src/xz_dec_lzma2.c
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File diff suppressed because it is too large Load Diff

860
libraries/xz-embedded/src/xz_dec_stream.c
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@ -1,860 +0,0 @@
/*
* .xz Stream decoder
*
* Author: Lasse Collin <lasse.collin@tukaani.org>
*
* This file has been put into the public domain.
* You can do whatever you want with this file.
*/
#include "xz_private.h"
#include "xz_stream.h"
#ifdef XZ_USE_CRC64
#define IS_CRC64(check_type) ((check_type) == XZ_CHECK_CRC64)
#else
#define IS_CRC64(check_type) false
#endif
/* Hash used to validate the Index field */
struct xz_dec_hash
{
vli_type unpadded;
vli_type uncompressed;
uint32_t crc32;
};
struct xz_dec
{
/* Position in dec_main() */
enum
{
SEQ_STREAM_HEADER,
SEQ_BLOCK_START,
SEQ_BLOCK_HEADER,
SEQ_BLOCK_UNCOMPRESS,
SEQ_BLOCK_PADDING,
SEQ_BLOCK_CHECK,
SEQ_INDEX,
SEQ_INDEX_PADDING,
SEQ_INDEX_CRC32,
SEQ_STREAM_FOOTER
} sequence;
/* Position in variable-length integers and Check fields */
uint32_t pos;
/* Variable-length integer decoded by dec_vli() */
vli_type vli;
/* Saved in_pos and out_pos */
size_t in_start;
size_t out_start;
#ifdef XZ_USE_CRC64
/* CRC32 or CRC64 value in Block or CRC32 value in Index */
uint64_t crc;
#else
/* CRC32 value in Block or Index */
uint32_t crc;
#endif
/* Type of the integrity check calculated from uncompressed data */
enum xz_check check_type;
/* Operation mode */
enum xz_mode mode;
/*
* True if the next call to xz_dec_run() is allowed to return
* XZ_BUF_ERROR.
*/
bool allow_buf_error;
/* Information stored in Block Header */
struct
{
/*
* Value stored in the Compressed Size field, or
* VLI_UNKNOWN if Compressed Size is not present.
*/
vli_type compressed;
/*
* Value stored in the Uncompressed Size field, or
* VLI_UNKNOWN if Uncompressed Size is not present.
*/
vli_type uncompressed;
/* Size of the Block Header field */
uint32_t size;
} block_header;
/* Information collected when decoding Blocks */
struct
{
/* Observed compressed size of the current Block */
vli_type compressed;
/* Observed uncompressed size of the current Block */
vli_type uncompressed;
/* Number of Blocks decoded so far */
vli_type count;
/*
* Hash calculated from the Block sizes. This is used to
* validate the Index field.
*/
struct xz_dec_hash hash;
} block;
/* Variables needed when verifying the Index field */
struct
{
/* Position in dec_index() */
enum
{
SEQ_INDEX_COUNT,
SEQ_INDEX_UNPADDED,
SEQ_INDEX_UNCOMPRESSED
} sequence;
/* Size of the Index in bytes */
vli_type size;
/* Number of Records (matches block.count in valid files) */
vli_type count;
/*
* Hash calculated from the Records (matches block.hash in
* valid files).
*/
struct xz_dec_hash hash;
} index;
/*
* Temporary buffer needed to hold Stream Header, Block Header,
* and Stream Footer. The Block Header is the biggest (1 KiB)
* so we reserve space according to that. buf[] has to be aligned
* to a multiple of four bytes; the size_t variables before it
* should guarantee this.
*/
struct
{
size_t pos;
size_t size;
uint8_t buf[1024];
} temp;
struct xz_dec_lzma2 *lzma2;
#ifdef XZ_DEC_BCJ
struct xz_dec_bcj *bcj;
bool bcj_active;
#endif
};
#ifdef XZ_DEC_ANY_CHECK
/* Sizes of the Check field with different Check IDs */
static const uint8_t check_sizes[16] = {0, 4, 4, 4, 8, 8, 8, 16,
16, 16, 32, 32, 32, 64, 64, 64};
#endif
/*
* Fill s->temp by copying data starting from b->in[b->in_pos]. Caller
* must have set s->temp.pos to indicate how much data we are supposed
* to copy into s->temp.buf. Return true once s->temp.pos has reached
* s->temp.size.
*/
static bool fill_temp(struct xz_dec *s, struct xz_buf *b)
{
size_t copy_size = min_t(size_t, b->in_size - b->in_pos, s->temp.size - s->temp.pos);
memcpy(s->temp.buf + s->temp.pos, b->in + b->in_pos, copy_size);
b->in_pos += copy_size;
s->temp.pos += copy_size;
if (s->temp.pos == s->temp.size)
{
s->temp.pos = 0;
return true;
}
return false;
}
/* Decode a variable-length integer (little-endian base-128 encoding) */
static enum xz_ret dec_vli(struct xz_dec *s, const uint8_t *in, size_t *in_pos, size_t in_size)
{
uint8_t byte;
if (s->pos == 0)
s->vli = 0;
while (*in_pos < in_size)
{
byte = in[*in_pos];
++*in_pos;
s->vli |= (vli_type)(byte & 0x7F) << s->pos;
if ((byte & 0x80) == 0)
{
/* Don't allow non-minimal encodings. */
if (byte == 0 && s->pos != 0)
return XZ_DATA_ERROR;
s->pos = 0;
return XZ_STREAM_END;
}
s->pos += 7;
if (s->pos == 7 * VLI_BYTES_MAX)
return XZ_DATA_ERROR;
}
return XZ_OK;
}
/*
* Decode the Compressed Data field from a Block. Update and validate
* the observed compressed and uncompressed sizes of the Block so that
* they don't exceed the values possibly stored in the Block Header
* (validation assumes that no integer overflow occurs, since vli_type
* is normally uint64_t). Update the CRC32 or CRC64 value if presence of
* the CRC32 or CRC64 field was indicated in Stream Header.
*
* Once the decoding is finished, validate that the observed sizes match
* the sizes possibly stored in the Block Header. Update the hash and
* Block count, which are later used to validate the Index field.
*/
static enum xz_ret dec_block(struct xz_dec *s, struct xz_buf *b)
{
enum xz_ret ret;
s->in_start = b->in_pos;
s->out_start = b->out_pos;
#ifdef XZ_DEC_BCJ
if (s->bcj_active)
ret = xz_dec_bcj_run(s->bcj, s->lzma2, b);
else
#endif
ret = xz_dec_lzma2_run(s->lzma2, b);
s->block.compressed += b->in_pos - s->in_start;
s->block.uncompressed += b->out_pos - s->out_start;
/*
* There is no need to separately check for VLI_UNKNOWN, since
* the observed sizes are always smaller than VLI_UNKNOWN.
*/
if (s->block.compressed > s->block_header.compressed ||
s->block.uncompressed > s->block_header.uncompressed)
return XZ_DATA_ERROR;
if (s->check_type == XZ_CHECK_CRC32)
s->crc = xz_crc32(b->out + s->out_start, b->out_pos - s->out_start, s->crc);
#ifdef XZ_USE_CRC64
else if (s->check_type == XZ_CHECK_CRC64)
s->crc = xz_crc64(b->out + s->out_start, b->out_pos - s->out_start, s->crc);
#endif
if (ret == XZ_STREAM_END)
{
if (s->block_header.compressed != VLI_UNKNOWN &&
s->block_header.compressed != s->block.compressed)
return XZ_DATA_ERROR;
if (s->block_header.uncompressed != VLI_UNKNOWN &&
s->block_header.uncompressed != s->block.uncompressed)
return XZ_DATA_ERROR;
s->block.hash.unpadded += s->block_header.size + s->block.compressed;
#ifdef XZ_DEC_ANY_CHECK
s->block.hash.unpadded += check_sizes[s->check_type];
#else
if (s->check_type == XZ_CHECK_CRC32)
s->block.hash.unpadded += 4;
else if (IS_CRC64(s->check_type))
s->block.hash.unpadded += 8;
#endif
s->block.hash.uncompressed += s->block.uncompressed;
s->block.hash.crc32 = xz_crc32((const uint8_t *)&s->block.hash, sizeof(s->block.hash),
s->block.hash.crc32);
++s->block.count;
}
return ret;
}
/* Update the Index size and the CRC32 value. */
static void index_update(struct xz_dec *s, const struct xz_buf *b)
{
size_t in_used = b->in_pos - s->in_start;
s->index.size += in_used;
s->crc = xz_crc32(b->in + s->in_start, in_used, s->crc);
}
/*
* Decode the Number of Records, Unpadded Size, and Uncompressed Size
* fields from the Index field. That is, Index Padding and CRC32 are not
* decoded by this function.
*
* This can return XZ_OK (more input needed), XZ_STREAM_END (everything
* successfully decoded), or XZ_DATA_ERROR (input is corrupt).
*/
static enum xz_ret dec_index(struct xz_dec *s, struct xz_buf *b)
{
enum xz_ret ret;
do
{
ret = dec_vli(s, b->in, &b->in_pos, b->in_size);
if (ret != XZ_STREAM_END)
{
index_update(s, b);
return ret;
}
switch (s->index.sequence)
{
case SEQ_INDEX_COUNT:
s->index.count = s->vli;
/*
* Validate that the Number of Records field
* indicates the same number of Records as
* there were Blocks in the Stream.
*/
if (s->index.count != s->block.count)
return XZ_DATA_ERROR;
s->index.sequence = SEQ_INDEX_UNPADDED;
break;
case SEQ_INDEX_UNPADDED:
s->index.hash.unpadded += s->vli;
s->index.sequence = SEQ_INDEX_UNCOMPRESSED;
break;
case SEQ_INDEX_UNCOMPRESSED:
s->index.hash.uncompressed += s->vli;
s->index.hash.crc32 = xz_crc32((const uint8_t *)&s->index.hash,
sizeof(s->index.hash), s->index.hash.crc32);
--s->index.count;
s->index.sequence = SEQ_INDEX_UNPADDED;
break;
}
} while (s->index.count > 0);
return XZ_STREAM_END;
}
/*
* Validate that the next four or eight input bytes match the value
* of s->crc. s->pos must be zero when starting to validate the first byte.
* The "bits" argument allows using the same code for both CRC32 and CRC64.
*/
static enum xz_ret crc_validate(struct xz_dec *s, struct xz_buf *b, uint32_t bits)
{
do
{
if (b->in_pos == b->in_size)
return XZ_OK;
if (((s->crc >> s->pos) & 0xFF) != b->in[b->in_pos++])
return XZ_DATA_ERROR;
s->pos += 8;
} while (s->pos < bits);
s->crc = 0;
s->pos = 0;
return XZ_STREAM_END;
}
#ifdef XZ_DEC_ANY_CHECK
/*
* Skip over the Check field when the Check ID is not supported.
* Returns true once the whole Check field has been skipped over.
*/
static bool check_skip(struct xz_dec *s, struct xz_buf *b)
{
while (s->pos < check_sizes[s->check_type])
{
if (b->in_pos == b->in_size)
return false;
++b->in_pos;
++s->pos;
}
s->pos = 0;
return true;
}
#endif
/* Decode the Stream Header field (the first 12 bytes of the .xz Stream). */
static enum xz_ret dec_stream_header(struct xz_dec *s)
{
if (!memeq(s->temp.buf, HEADER_MAGIC, HEADER_MAGIC_SIZE))
return XZ_FORMAT_ERROR;
if (xz_crc32(s->temp.buf + HEADER_MAGIC_SIZE, 2, 0) !=
get_le32(s->temp.buf + HEADER_MAGIC_SIZE + 2))
return XZ_DATA_ERROR;
if (s->temp.buf[HEADER_MAGIC_SIZE] != 0)
return XZ_OPTIONS_ERROR;
/*
* Of integrity checks, we support none (Check ID = 0),
* CRC32 (Check ID = 1), and optionally CRC64 (Check ID = 4).
* However, if XZ_DEC_ANY_CHECK is defined, we will accept other
* check types too, but then the check won't be verified and
* a warning (XZ_UNSUPPORTED_CHECK) will be given.
*/
s->check_type = s->temp.buf[HEADER_MAGIC_SIZE + 1];
#ifdef XZ_DEC_ANY_CHECK
if (s->check_type > XZ_CHECK_MAX)
return XZ_OPTIONS_ERROR;
if (s->check_type > XZ_CHECK_CRC32 && !IS_CRC64(s->check_type))
return XZ_UNSUPPORTED_CHECK;
#else
if (s->check_type > XZ_CHECK_CRC32 && !IS_CRC64(s->check_type))
return XZ_OPTIONS_ERROR;
#endif
return XZ_OK;
}
/* Decode the Stream Footer field (the last 12 bytes of the .xz Stream) */
static enum xz_ret dec_stream_footer(struct xz_dec *s)
{
if (!memeq(s->temp.buf + 10, FOOTER_MAGIC, FOOTER_MAGIC_SIZE))
return XZ_DATA_ERROR;
if (xz_crc32(s->temp.buf + 4, 6, 0) != get_le32(s->temp.buf))
return XZ_DATA_ERROR;
/*
* Validate Backward Size. Note that we never added the size of the
* Index CRC32 field to s->index.size, thus we use s->index.size / 4
* instead of s->index.size / 4 - 1.
*/
if ((s->index.size >> 2) != get_le32(s->temp.buf + 4))
return XZ_DATA_ERROR;
if (s->temp.buf[8] != 0 || s->temp.buf[9] != s->check_type)
return XZ_DATA_ERROR;
/*
* Use XZ_STREAM_END instead of XZ_OK to be more convenient
* for the caller.
*/
return XZ_STREAM_END;
}
/* Decode the Block Header and initialize the filter chain. */
static enum xz_ret dec_block_header(struct xz_dec *s)
{
enum xz_ret ret;
/*
* Validate the CRC32. We know that the temp buffer is at least
* eight bytes so this is safe.
*/
s->temp.size -= 4;
if (xz_crc32(s->temp.buf, s->temp.size, 0) != get_le32(s->temp.buf + s->temp.size))
return XZ_DATA_ERROR;
s->temp.pos = 2;
/*
* Catch unsupported Block Flags. We support only one or two filters
* in the chain, so we catch that with the same test.
*/
#ifdef XZ_DEC_BCJ
if (s->temp.buf[1] & 0x3E)
#else
if (s->temp.buf[1] & 0x3F)
#endif
return XZ_OPTIONS_ERROR;
/* Compressed Size */
if (s->temp.buf[1] & 0x40)
{
if (dec_vli(s, s->temp.buf, &s->temp.pos, s->temp.size) != XZ_STREAM_END)
return XZ_DATA_ERROR;
s->block_header.compressed = s->vli;
}
else
{
s->block_header.compressed = VLI_UNKNOWN;
}
/* Uncompressed Size */
if (s->temp.buf[1] & 0x80)
{
if (dec_vli(s, s->temp.buf, &s->temp.pos, s->temp.size) != XZ_STREAM_END)
return XZ_DATA_ERROR;
s->block_header.uncompressed = s->vli;
}
else
{
s->block_header.uncompressed = VLI_UNKNOWN;
}
#ifdef XZ_DEC_BCJ
/* If there are two filters, the first one must be a BCJ filter. */
s->bcj_active = s->temp.buf[1] & 0x01;
if (s->bcj_active)
{
if (s->temp.size - s->temp.pos < 2)
return XZ_OPTIONS_ERROR;
ret = xz_dec_bcj_reset(s->bcj, s->temp.buf[s->temp.pos++]);
if (ret != XZ_OK)
return ret;
/*
* We don't support custom start offset,
* so Size of Properties must be zero.
*/
if (s->temp.buf[s->temp.pos++] != 0x00)
return XZ_OPTIONS_ERROR;
}
#endif
/* Valid Filter Flags always take at least two bytes. */
if (s->temp.size - s->temp.pos < 2)
return XZ_DATA_ERROR;
/* Filter ID = LZMA2 */
if (s->temp.buf[s->temp.pos++] != 0x21)
return XZ_OPTIONS_ERROR;
/* Size of Properties = 1-byte Filter Properties */
if (s->temp.buf[s->temp.pos++] != 0x01)
return XZ_OPTIONS_ERROR;
/* Filter Properties contains LZMA2 dictionary size. */
if (s->temp.size - s->temp.pos < 1)
return XZ_DATA_ERROR;
ret = xz_dec_lzma2_reset(s->lzma2, s->temp.buf[s->temp.pos++]);
if (ret != XZ_OK)
return ret;
/* The rest must be Header Padding. */
while (s->temp.pos < s->temp.size)
if (s->temp.buf[s->temp.pos++] != 0x00)
return XZ_OPTIONS_ERROR;
s->temp.pos = 0;
s->block.compressed = 0;
s->block.uncompressed = 0;
return XZ_OK;
}
static enum xz_ret dec_main(struct xz_dec *s, struct xz_buf *b)
{
enum xz_ret ret;
/*
* Store the start position for the case when we are in the middle
* of the Index field.
*/
s->in_start = b->in_pos;
while (true)
{
switch (s->sequence)
{
case SEQ_STREAM_HEADER:
/*
* Stream Header is copied to s->temp, and then
* decoded from there. This way if the caller
* gives us only little input at a time, we can
* still keep the Stream Header decoding code
* simple. Similar approach is used in many places
* in this file.
*/
if (!fill_temp(s, b))
return XZ_OK;
/*
* If dec_stream_header() returns
* XZ_UNSUPPORTED_CHECK, it is still possible
* to continue decoding if working in multi-call
* mode. Thus, update s->sequence before calling
* dec_stream_header().
*/
s->sequence = SEQ_BLOCK_START;
ret = dec_stream_header(s);
if (ret != XZ_OK)
return ret;
case SEQ_BLOCK_START:
/* We need one byte of input to continue. */
if (b->in_pos == b->in_size)
return XZ_OK;
/* See if this is the beginning of the Index field. */
if (b->in[b->in_pos] == 0)
{
s->in_start = b->in_pos++;
s->sequence = SEQ_INDEX;
break;
}
/*
* Calculate the size of the Block Header and
* prepare to decode it.
*/
s->block_header.size = ((uint32_t)b->in[b->in_pos] + 1) * 4;
s->temp.size = s->block_header.size;
s->temp.pos = 0;
s->sequence = SEQ_BLOCK_HEADER;
case SEQ_BLOCK_HEADER:
if (!fill_temp(s, b))
return XZ_OK;
ret = dec_block_header(s);
if (ret != XZ_OK)
return ret;
s->sequence = SEQ_BLOCK_UNCOMPRESS;
case SEQ_BLOCK_UNCOMPRESS:
ret = dec_block(s, b);
if (ret != XZ_STREAM_END)
return ret;
s->sequence = SEQ_BLOCK_PADDING;
case SEQ_BLOCK_PADDING:
/*
* Size of Compressed Data + Block Padding
* must be a multiple of four. We don't need
* s->block.compressed for anything else
* anymore, so we use it here to test the size
* of the Block Padding field.
*/
while (s->block.compressed & 3)
{
if (b->in_pos == b->in_size)
return XZ_OK;
if (b->in[b->in_pos++] != 0)
return XZ_DATA_ERROR;
++s->block.compressed;
}
s->sequence = SEQ_BLOCK_CHECK;
case SEQ_BLOCK_CHECK:
if (s->check_type == XZ_CHECK_CRC32)
{
ret = crc_validate(s, b, 32);
if (ret != XZ_STREAM_END)
return ret;
}
else if (IS_CRC64(s->check_type))
{
ret = crc_validate(s, b, 64);
if (ret != XZ_STREAM_END)
return ret;
}
#ifdef XZ_DEC_ANY_CHECK
else if (!check_skip(s, b))
{
return XZ_OK;
}
#endif
s->sequence = SEQ_BLOCK_START;
break;
case SEQ_INDEX:
ret = dec_index(s, b);
if (ret != XZ_STREAM_END)
return ret;
s->sequence = SEQ_INDEX_PADDING;
case SEQ_INDEX_PADDING:
while ((s->index.size + (b->in_pos - s->in_start)) & 3)
{
if (b->in_pos == b->in_size)
{
index_update(s, b);
return XZ_OK;
}
if (b->in[b->in_pos++] != 0)
return XZ_DATA_ERROR;
}
/* Finish the CRC32 value and Index size. */
index_update(s, b);
/* Compare the hashes to validate the Index field. */
if (!memeq(&s->block.hash, &s->index.hash, sizeof(s->block.hash)))
return XZ_DATA_ERROR;
s->sequence = SEQ_INDEX_CRC32;
case SEQ_INDEX_CRC32:
ret = crc_validate(s, b, 32);
if (ret != XZ_STREAM_END)
return ret;
s->temp.size = STREAM_HEADER_SIZE;
s->sequence = SEQ_STREAM_FOOTER;
case SEQ_STREAM_FOOTER:
if (!fill_temp(s, b))
return XZ_OK;
return dec_stream_footer(s);
}
}
/* Never reached */
}
/*
* xz_dec_run() is a wrapper for dec_main() to handle some special cases in
* multi-call and single-call decoding.
*
* In multi-call mode, we must return XZ_BUF_ERROR when it seems clear that we
* are not going to make any progress anymore. This is to prevent the caller
* from calling us infinitely when the input file is truncated or otherwise
* corrupt. Since zlib-style API allows that the caller fills the input buffer
* only when the decoder doesn't produce any new output, we have to be careful
* to avoid returning XZ_BUF_ERROR too easily: XZ_BUF_ERROR is returned only
* after the second consecutive call to xz_dec_run() that makes no progress.
*
* In single-call mode, if we couldn't decode everything and no error
* occurred, either the input is truncated or the output buffer is too small.
* Since we know that the last input byte never produces any output, we know
* that if all the input was consumed and decoding wasn't finished, the file
* must be corrupt. Otherwise the output buffer has to be too small or the
* file is corrupt in a way that decoding it produces too big output.
*
* If single-call decoding fails, we reset b->in_pos and b->out_pos back to
* their original values. This is because with some filter chains there won't
* be any valid uncompressed data in the output buffer unless the decoding
* actually succeeds (that's the price to pay of using the output buffer as
* the workspace).
*/
XZ_EXTERN enum xz_ret xz_dec_run(struct xz_dec *s, struct xz_buf *b)
{
size_t in_start;
size_t out_start;
enum xz_ret ret;
if (DEC_IS_SINGLE(s->mode))
xz_dec_reset(s);
in_start = b->in_pos;
out_start = b->out_pos;
ret = dec_main(s, b);
if (DEC_IS_SINGLE(s->mode))
{
if (ret == XZ_OK)
ret = b->in_pos == b->in_size ? XZ_DATA_ERROR : XZ_BUF_ERROR;
if (ret != XZ_STREAM_END)
{
b->in_pos = in_start;
b->out_pos = out_start;
}
}
else if (ret == XZ_OK && in_start == b->in_pos && out_start == b->out_pos)
{
if (s->allow_buf_error)
ret = XZ_BUF_ERROR;
s->allow_buf_error = true;
}
else
{
s->allow_buf_error = false;
}
return ret;
}
XZ_EXTERN struct xz_dec *xz_dec_init(enum xz_mode mode, uint32_t dict_max)
{
struct xz_dec *s = kmalloc(sizeof(*s), GFP_KERNEL);
if (s == NULL)
return NULL;
s->mode = mode;
#ifdef XZ_DEC_BCJ
s->bcj = xz_dec_bcj_create(DEC_IS_SINGLE(mode));
if (s->bcj == NULL)
goto error_bcj;
#endif
s->lzma2 = xz_dec_lzma2_create(mode, dict_max);
if (s->lzma2 == NULL)
goto error_lzma2;
xz_dec_reset(s);
return s;
error_lzma2:
#ifdef XZ_DEC_BCJ
xz_dec_bcj_end(s->bcj);
error_bcj:
#endif
kfree(s);
return NULL;
}
XZ_EXTERN void xz_dec_reset(struct xz_dec *s)
{
s->sequence = SEQ_STREAM_HEADER;
s->allow_buf_error = false;
s->pos = 0;
s->crc = 0;
memzero(&s->block, sizeof(s->block));
memzero(&s->index, sizeof(s->index));
s->temp.pos = 0;
s->temp.size = STREAM_HEADER_SIZE;
}
XZ_EXTERN void xz_dec_end(struct xz_dec *s)
{
if (s != NULL)
{
xz_dec_lzma2_end(s->lzma2);
#ifdef XZ_DEC_BCJ
xz_dec_bcj_end(s->bcj);
#endif
kfree(s);
}
}

204
libraries/xz-embedded/src/xz_lzma2.h
View File

@ -1,204 +0,0 @@
/*
* LZMA2 definitions
*
* Authors: Lasse Collin <lasse.collin@tukaani.org>
* Igor Pavlov <http://7-zip.org/>
*
* This file has been put into the public domain.
* You can do whatever you want with this file.
*/
#ifndef XZ_LZMA2_H
#define XZ_LZMA2_H
/* Range coder constants */
#define RC_SHIFT_BITS 8
#define RC_TOP_BITS 24
#define RC_TOP_VALUE (1 << RC_TOP_BITS)
#define RC_BIT_MODEL_TOTAL_BITS 11
#define RC_BIT_MODEL_TOTAL (1 << RC_BIT_MODEL_TOTAL_BITS)
#define RC_MOVE_BITS 5
/*
* Maximum number of position states. A position state is the lowest pb
* number of bits of the current uncompressed offset. In some places there
* are different sets of probabilities for different position states.
*/
#define POS_STATES_MAX (1 << 4)
/*
* This enum is used to track which LZMA symbols have occurred most recently
* and in which order. This information is used to predict the next symbol.
*
* Symbols:
* - Literal: One 8-bit byte
* - Match: Repeat a chunk of data at some distance
* - Long repeat: Multi-byte match at a recently seen distance
* - Short repeat: One-byte repeat at a recently seen distance
*
* The symbol names are in from STATE_oldest_older_previous. REP means
* either short or long repeated match, and NONLIT means any non-literal.
*/
enum lzma_state
{
STATE_LIT_LIT,
STATE_MATCH_LIT_LIT,
STATE_REP_LIT_LIT,
STATE_SHORTREP_LIT_LIT,
STATE_MATCH_LIT,
STATE_REP_LIT,
STATE_SHORTREP_LIT,
STATE_LIT_MATCH,
STATE_LIT_LONGREP,
STATE_LIT_SHORTREP,
STATE_NONLIT_MATCH,
STATE_NONLIT_REP
};
/* Total number of states */
#define STATES 12
/* The lowest 7 states indicate that the previous state was a literal. */
#define LIT_STATES 7
/* Indicate that the latest symbol was a literal. */
static inline void lzma_state_literal(enum lzma_state *state)
{
if (*state <= STATE_SHORTREP_LIT_LIT)
*state = STATE_LIT_LIT;
else if (*state <= STATE_LIT_SHORTREP)
*state -= 3;
else
*state -= 6;
}
/* Indicate that the latest symbol was a match. */
static inline void lzma_state_match(enum lzma_state *state)
{
*state = *state < LIT_STATES ? STATE_LIT_MATCH : STATE_NONLIT_MATCH;
}
/* Indicate that the latest state was a long repeated match. */
static inline void lzma_state_long_rep(enum lzma_state *state)
{
*state = *state < LIT_STATES ? STATE_LIT_LONGREP : STATE_NONLIT_REP;
}
/* Indicate that the latest symbol was a short match. */
static inline void lzma_state_short_rep(enum lzma_state *state)
{
*state = *state < LIT_STATES ? STATE_LIT_SHORTREP : STATE_NONLIT_REP;
}
/* Test if the previous symbol was a literal. */
static inline bool lzma_state_is_literal(enum lzma_state state)
{
return state < LIT_STATES;
}
/* Each literal coder is divided in three sections:
* - 0x001-0x0FF: Without match byte
* - 0x101-0x1FF: With match byte; match bit is 0
* - 0x201-0x2FF: With match byte; match bit is 1
*
* Match byte is used when the previous LZMA symbol was something else than
* a literal (that is, it was some kind of match).
*/
#define LITERAL_CODER_SIZE 0x300
/* Maximum number of literal coders */
#define LITERAL_CODERS_MAX (1 << 4)
/* Minimum length of a match is two bytes. */
#define MATCH_LEN_MIN 2
/* Match length is encoded with 4, 5, or 10 bits.
*
* Length Bits
* 2-9 4 = Choice=0 + 3 bits
* 10-17 5 = Choice=1 + Choice2=0 + 3 bits
* 18-273 10 = Choice=1 + Choice2=1 + 8 bits
*/
#define LEN_LOW_BITS 3
#define LEN_LOW_SYMBOLS (1 << LEN_LOW_BITS)
#define LEN_MID_BITS 3
#define LEN_MID_SYMBOLS (1 << LEN_MID_BITS)
#define LEN_HIGH_BITS 8
#define LEN_HIGH_SYMBOLS (1 << LEN_HIGH_BITS)
#define LEN_SYMBOLS (LEN_LOW_SYMBOLS + LEN_MID_SYMBOLS + LEN_HIGH_SYMBOLS)
/*
* Maximum length of a match is 273 which is a result of the encoding
* described above.
*/
#define MATCH_LEN_MAX (MATCH_LEN_MIN + LEN_SYMBOLS - 1)
/*
* Different sets of probabilities are used for match distances that have
* very short match length: Lengths of 2, 3, and 4 bytes have a separate
* set of probabilities for each length. The matches with longer length
* use a shared set of probabilities.
*/
#define DIST_STATES 4
/*
* Get the index of the appropriate probability array for decoding
* the distance slot.
*/
static inline uint32_t lzma_get_dist_state(uint32_t len)
{
return len < DIST_STATES + MATCH_LEN_MIN ? len - MATCH_LEN_MIN : DIST_STATES - 1;
}
/*
* The highest two bits of a 32-bit match distance are encoded using six bits.
* This six-bit value is called a distance slot. This way encoding a 32-bit
* value takes 6-36 bits, larger values taking more bits.
*/
#define DIST_SLOT_BITS 6
#define DIST_SLOTS (1 << DIST_SLOT_BITS)
/* Match distances up to 127 are fully encoded using probabilities. Since
* the highest two bits (distance slot) are always encoded using six bits,
* the distances 0-3 don't need any additional bits to encode, since the
* distance slot itself is the same as the actual distance. DIST_MODEL_START
* indicates the first distance slot where at least one additional bit is
* needed.
*/
#define DIST_MODEL_START 4
/*
* Match distances greater than 127 are encoded in three pieces:
* - distance slot: the highest two bits
* - direct bits: 2-26 bits below the highest two bits
* - alignment bits: four lowest bits
*
* Direct bits don't use any probabilities.
*
* The distance slot value of 14 is for distances 128-191.
*/
#define DIST_MODEL_END 14
/* Distance slots that indicate a distance <= 127. */
#define FULL_DISTANCES_BITS (DIST_MODEL_END / 2)
#define FULL_DISTANCES (1 << FULL_DISTANCES_BITS)
/*
* For match distances greater than 127, only the highest two bits and the
* lowest four bits (alignment) is encoded using probabilities.
*/
#define ALIGN_BITS 4
#define ALIGN_SIZE (1 << ALIGN_BITS)
#define ALIGN_MASK (ALIGN_SIZE - 1)
/* Total number of all probability variables */
#define PROBS_TOTAL (1846 + LITERAL_CODERS_MAX *LITERAL_CODER_SIZE)
/*
* LZMA remembers the four most recent match distances. Reusing these
* distances tends to take less space than re-encoding the actual
* distance value.
*/
#define REPS 4
#endif

150
libraries/xz-embedded/src/xz_private.h
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@ -1,150 +0,0 @@
/*
* Private includes and definitions
*
* Author: Lasse Collin <lasse.collin@tukaani.org>
*
* This file has been put into the public domain.
* You can do whatever you want with this file.
*/
#ifndef XZ_PRIVATE_H
#define XZ_PRIVATE_H
#ifdef __KERNEL__
#include <linux/xz.h>
#include <linux/kernel.h>
#include <asm/unaligned.h>
/* XZ_PREBOOT may be defined only via decompress_unxz.c. */
#ifndef XZ_PREBOOT
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/string.h>
#ifdef CONFIG_XZ_DEC_X86
#define XZ_DEC_X86
#endif
#ifdef CONFIG_XZ_DEC_POWERPC
#define XZ_DEC_POWERPC
#endif
#ifdef CONFIG_XZ_DEC_IA64
#define XZ_DEC_IA64
#endif
#ifdef CONFIG_XZ_DEC_ARM
#define XZ_DEC_ARM
#endif
#ifdef CONFIG_XZ_DEC_ARMTHUMB
#define XZ_DEC_ARMTHUMB
#endif
#ifdef CONFIG_XZ_DEC_SPARC
#define XZ_DEC_SPARC
#endif
#define memeq(a, b, size) (memcmp(a, b, size) == 0)
#define memzero(buf, size) memset(buf, 0, size)
#endif
#define get_le32(p) le32_to_cpup((const uint32_t *)(p))
#else
/*
* For userspace builds, use a separate header to define the required
* macros and functions. This makes it easier to adapt the code into
* different environments and avoids clutter in the Linux kernel tree.
*/
#include "xz_config.h"
#endif
/* If no specific decoding mode is requested, enable support for all modes. */
#if !defined(XZ_DEC_SINGLE) && !defined(XZ_DEC_PREALLOC) && !defined(XZ_DEC_DYNALLOC)
#define XZ_DEC_SINGLE
#define XZ_DEC_PREALLOC
#define XZ_DEC_DYNALLOC
#endif
/*
* The DEC_IS_foo(mode) macros are used in "if" statements. If only some
* of the supported modes are enabled, these macros will evaluate to true or
* false at compile time and thus allow the compiler to omit unneeded code.
*/
#ifdef XZ_DEC_SINGLE
#define DEC_IS_SINGLE(mode) ((mode) == XZ_SINGLE)
#else
#define DEC_IS_SINGLE(mode) (false)
#endif
#ifdef XZ_DEC_PREALLOC
#define DEC_IS_PREALLOC(mode) ((mode) == XZ_PREALLOC)
#else
#define DEC_IS_PREALLOC(mode) (false)
#endif
#ifdef XZ_DEC_DYNALLOC
#define DEC_IS_DYNALLOC(mode) ((mode) == XZ_DYNALLOC)
#else
#define DEC_IS_DYNALLOC(mode) (false)
#endif
#if !defined(XZ_DEC_SINGLE)
#define DEC_IS_MULTI(mode) (true)
#elif defined(XZ_DEC_PREALLOC) || defined(XZ_DEC_DYNALLOC)
#define DEC_IS_MULTI(mode) ((mode) != XZ_SINGLE)
#else
#define DEC_IS_MULTI(mode) (false)
#endif
/*
* If any of the BCJ filter decoders are wanted, define XZ_DEC_BCJ.
* XZ_DEC_BCJ is used to enable generic support for BCJ decoders.
*/
#ifndef XZ_DEC_BCJ
#if defined(XZ_DEC_X86) || defined(XZ_DEC_POWERPC) || defined(XZ_DEC_IA64) || \
defined(XZ_DEC_ARM) || defined(XZ_DEC_ARM) || defined(XZ_DEC_ARMTHUMB) || \
defined(XZ_DEC_SPARC)
#define XZ_DEC_BCJ
#endif
#endif
/*
* Allocate memory for LZMA2 decoder. xz_dec_lzma2_reset() must be used
* before calling xz_dec_lzma2_run().
*/
XZ_EXTERN struct xz_dec_lzma2 *xz_dec_lzma2_create(enum xz_mode mode, uint32_t dict_max);
/*
* Decode the LZMA2 properties (one byte) and reset the decoder. Return
* XZ_OK on success, XZ_MEMLIMIT_ERROR if the preallocated dictionary is not
* big enough, and XZ_OPTIONS_ERROR if props indicates something that this
* decoder doesn't support.
*/
XZ_EXTERN enum xz_ret xz_dec_lzma2_reset(struct xz_dec_lzma2 *s, uint8_t props);
/* Decode raw LZMA2 stream from b->in to b->out. */
XZ_EXTERN enum xz_ret xz_dec_lzma2_run(struct xz_dec_lzma2 *s, struct xz_buf *b);
/* Free the memory allocated for the LZMA2 decoder. */
XZ_EXTERN void xz_dec_lzma2_end(struct xz_dec_lzma2 *s);
#ifdef XZ_DEC_BCJ
/*
* Allocate memory for BCJ decoders. xz_dec_bcj_reset() must be used before
* calling xz_dec_bcj_run().
*/
XZ_EXTERN struct xz_dec_bcj *xz_dec_bcj_create(bool single_call);
/*
* Decode the Filter ID of a BCJ filter. This implementation doesn't
* support custom start offsets, so no decoding of Filter Properties
* is needed. Returns XZ_OK if the given Filter ID is supported.
* Otherwise XZ_OPTIONS_ERROR is returned.
*/
XZ_EXTERN enum xz_ret xz_dec_bcj_reset(struct xz_dec_bcj *s, uint8_t id);
/*
* Decode raw BCJ + LZMA2 stream. This must be used only if there actually is
* a BCJ filter in the chain. If the chain has only LZMA2, xz_dec_lzma2_run()
* must be called directly.
*/
XZ_EXTERN enum xz_ret xz_dec_bcj_run(struct xz_dec_bcj *s, struct xz_dec_lzma2 *lzma2,
struct xz_buf *b);
/* Free the memory allocated for the BCJ filters. */
#define xz_dec_bcj_end(s) kfree(s)
#endif
#endif

62
libraries/xz-embedded/src/xz_stream.h
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@ -1,62 +0,0 @@
/*
* Definitions for handling the .xz file format
*
* Author: Lasse Collin <lasse.collin@tukaani.org>
*
* This file has been put into the public domain.
* You can do whatever you want with this file.
*/
#ifndef XZ_STREAM_H
#define XZ_STREAM_H
#if defined(__KERNEL__) && !XZ_INTERNAL_CRC32
#include <linux/crc32.h>
#undef crc32
#define xz_crc32(buf, size, crc) (~crc32_le(~(uint32_t)(crc), buf, size))
#endif
/*
* See the .xz file format specification at
* http://tukaani.org/xz/xz-file-format.txt
* to understand the container format.
*/
#define STREAM_HEADER_SIZE 12
#define HEADER_MAGIC "\3757zXZ"
#define HEADER_MAGIC_SIZE 6
#define FOOTER_MAGIC "YZ"
#define FOOTER_MAGIC_SIZE 2
/*
* Variable-length integer can hold a 63-bit unsigned integer or a special
* value indicating that the value is unknown.
*
* Experimental: vli_type can be defined to uint32_t to save a few bytes
* in code size (no effect on speed). Doing so limits the uncompressed and
* compressed size of the file to less than 256 MiB and may also weaken
* error detection slightly.
*/
typedef uint64_t vli_type;
#define VLI_MAX ((vli_type) - 1 / 2)
#define VLI_UNKNOWN ((vli_type) - 1)
/* Maximum encoded size of a VLI */
#define VLI_BYTES_MAX (sizeof(vli_type) * 8 / 7)
/* Integrity Check types */
enum xz_check
{
XZ_CHECK_NONE = 0,
XZ_CHECK_CRC32 = 1,
XZ_CHECK_CRC64 = 4,
XZ_CHECK_SHA256 = 10
};
/* Maximum possible Check ID */
#define XZ_CHECK_MAX 15
#endif

144
libraries/xz-embedded/xzminidec.c
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@ -1,144 +0,0 @@
/*
* Simple XZ decoder command line tool
*
* Author: Lasse Collin <lasse.collin@tukaani.org>
*
* This file has been put into the public domain.
* You can do whatever you want with this file.
*/
/*
* This is really limited: Not all filters from .xz format are supported,
* only CRC32 is supported as the integrity check, and decoding of
* concatenated .xz streams is not supported. Thus, you may want to look
* at xzdec from XZ Utils if a few KiB bigger tool is not a problem.
*/
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include "xz.h"
static uint8_t in[BUFSIZ];
static uint8_t out[BUFSIZ];
int main(int argc, char **argv)
{
struct xz_buf b;
struct xz_dec *s;
enum xz_ret ret;
const char *msg;
if (argc >= 2 && strcmp(argv[1], "--help") == 0)
{
fputs("Uncompress a .xz file from stdin to stdout.\n"
"Arguments other than `--help' are ignored.\n",
stdout);
return 0;
}
xz_crc32_init();
#ifdef XZ_USE_CRC64
xz_crc64_init();
#endif
/*
* Support up to 64 MiB dictionary. The actually needed memory
* is allocated once the headers have been parsed.
*/
s = xz_dec_init(XZ_DYNALLOC, 1 << 26);
if (s == NULL)
{
msg = "Memory allocation failed\n";
goto error;
}
b.in = in;
b.in_pos = 0;
b.in_size = 0;
b.out = out;
b.out_pos = 0;
b.out_size = BUFSIZ;
while (true)
{
if (b.in_pos == b.in_size)
{
b.in_size = fread(in, 1, sizeof(in), stdin);
b.in_pos = 0;
}
ret = xz_dec_run(s, &b);
if (b.out_pos == sizeof(out))
{
if (fwrite(out, 1, b.out_pos, stdout) != b.out_pos)
{
msg = "Write error\n";
goto error;
}
b.out_pos = 0;
}
if (ret == XZ_OK)
continue;
#ifdef XZ_DEC_ANY_CHECK
if (ret == XZ_UNSUPPORTED_CHECK)
{
fputs(argv[0], stderr);
fputs(": ", stderr);
fputs("Unsupported check; not verifying "
"file integrity\n",
stderr);
continue;
}
#endif
if (fwrite(out, 1, b.out_pos, stdout) != b.out_pos || fclose(stdout))
{
msg = "Write error\n";
goto error;
}
switch (ret)
{
case XZ_STREAM_END:
xz_dec_end(s);
return 0;
case XZ_MEM_ERROR:
msg = "Memory allocation failed\n";
goto error;
case XZ_MEMLIMIT_ERROR:
msg = "Memory usage limit reached\n";
goto error;
case XZ_FORMAT_ERROR:
msg = "Not a .xz file\n";
goto error;
case XZ_OPTIONS_ERROR:
msg = "Unsupported options in the .xz headers\n";
goto error;
case XZ_DATA_ERROR:
case XZ_BUF_ERROR:
msg = "File is corrupt\n";
goto error;
default:
msg = "Bug!\n";
goto error;
}
}
error:
xz_dec_end(s);
fputs(argv[0], stderr);
fputs(": ", stderr);
fputs(msg, stderr);
return 1;
}