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BitArchiveReader
The BitArchiveReader class allows reading metadata of archives, as well as extracting them.
#include <bit7z/bitarchivereader.hpp>inherits from BitAbstractArchiveOpener, BitInputArchive.
| Return type | Name |
|---|---|
| BitArchiveReader( const Bit7zLibrary& lib, const std::vector< byte_t >& inArchive, const BitInFormat& format = BitFormat::Auto, const tstring& password = {} ) | |
| BitArchiveReader( const Bit7zLibrary& lib, const tstring& inArchive, const BitInFormat& format = BitFormat::Auto, const tstring& password = {} ) | |
| BitArchiveReader( const Bit7zLibrary& lib, std::istream& inArchive, const BitInFormat& format = BitFormat::Auto, const tstring& password = {} ) | |
| ~BitArchiveReader() override = default | |
| const tstring & | archivePath() const noexcept |
| map< BitProperty, BitPropVariant > | archiveProperties() const |
| BitPropVariant | archiveProperty( BitProperty property ) const |
| BitInputArchive::ConstIterator | begin() const noexcept |
| BitInputArchive::ConstIterator | cbegin() const noexcept |
| BitInputArchive::ConstIterator | cend() const noexcept |
| void | clearPassword() noexcept |
| bool | contains( const tstring& path ) const noexcept |
| const BitInFormat & | detectedFormat() const noexcept |
| BitInputArchive::ConstIterator | end() const noexcept |
| const BitInFormat & | extractionFormat() const noexcept |
| void | extractTo( byte_t* buffer, std::size_t size, uint32_t index = 0 ) const |
| void | extractTo( byte_t( &buffer )[N], uint32_t index = 0 ) const |
| void | extractTo( const tstring& outDir ) const |
| void | extractTo( const tstring& outDir, const std::vector< uint32_t >& indices ) const |
| void | extractTo( std::array< byte_t, N >& buffer, uint32_t index = 0 ) const |
| void | extractTo( std::map< tstring, std::vector< byte_t > >& outMap ) const |
| void | extractTo( std::ostream& outStream, uint32_t index = 0 ) const |
| void | extractTo( std::vector< byte_t >& outBuffer, uint32_t index = 0 ) const |
| FileCallback | fileCallback() const |
| uint32_t | filesCount() const |
| BitInputArchive::ConstIterator | find( const tstring& path ) const noexcept |
| uint32_t | foldersCount() const |
| const BitInFormat &override | format() const noexcept |
| const BitAbstractArchiveHandler & | handler() const noexcept |
| bool | hasEncryptedItems() const |
| bool | isEncrypted() const |
| bool | isItemEncrypted( uint32_t index ) const |
| bool | isItemFolder( uint32_t index ) const |
| bool | isMultiVolume() const |
| bool | isPasswordDefined() const noexcept |
| bool | isSolid() const |
| BitArchiveItemOffset | itemAt( uint32_t index ) const |
| BitPropVariant | itemProperty( uint32_t index, BitProperty property ) const |
| vector< BitArchiveItemInfo > | items() const |
| uint32_t | itemsCount() const |
| const Bit7zLibrary & | library() const noexcept |
| OverwriteMode | overwriteMode() const |
| uint64_t | packSize() const |
| tstring | password() const |
| PasswordCallback | passwordCallback() const |
| ProgressCallback | progressCallback() const |
| RatioCallback | ratioCallback() const |
| bool | retainDirectories() const noexcept |
| void | setFileCallback( const FileCallback& callback ) |
| void | setOverwriteMode( OverwriteMode mode ) |
| void | setPassword( const tstring& password ) |
| void | setPasswordCallback( const PasswordCallback& callback ) |
| void | setProgressCallback( const ProgressCallback& callback ) |
| void | setRatioCallback( const RatioCallback& callback ) |
| void | setRetainDirectories( bool retain ) noexcept |
| void | setTotalCallback( const TotalCallback& callback ) |
| uint64_t | size() const |
| void | test() const |
| void | testItem( uint32_t index ) const |
| TotalCallback | totalCallback() const |
| uint32_t | volumesCount() const |
| Return type | Name |
|---|---|
| bool | isEncrypted( const Bit7zLibrary& lib, T&& inArchive, const BitInFormat& format = BitFormat::Auto ) |
| bool | isHeaderEncrypted( const Bit7zLibrary& lib, T&& inArchive, const BitInFormat& format = BitFormat::Auto ) |
BitArchiveReader( const Bit7zLibrary& lib, const std::vector< byte_t >& inArchive, const BitInFormat& format = BitFormat::Auto, const tstring& password = {} )
Constructs a BitArchiveReader object, opening the archive in the input buffer.
Note
When bit7z is compiled using the BIT7Z_AUTO_FORMAT option, the format argument has the default value BitFormat::Auto (automatic format detection of the input archive). On the contrary, when BIT7Z_AUTO_FORMAT is not defined (i.e., no auto format detection available), the format argument must be specified.
Parameters:
- lib: the 7z library used.
- inArchive: the input buffer containing the archive to be read.
- format: the format of the input archive.
- password: the password needed for opening the input archive.
BitArchiveReader( const Bit7zLibrary& lib, const tstring& inArchive, const BitInFormat& format = BitFormat::Auto, const tstring& password = {} )
Constructs a BitArchiveReader object, opening the input file archive.
Note
When bit7z is compiled using the BIT7Z_AUTO_FORMAT option, the format argument has the default value BitFormat::Auto (automatic format detection of the input archive). On the contrary, when BIT7Z_AUTO_FORMAT is not defined (i.e., no auto format detection available), the format argument must be specified.
Parameters:
- lib: the 7z library used.
- inArchive: the path to the archive to be read.
- format: the format of the input archive.
- password: the password needed for opening the input archive.
BitArchiveReader( const Bit7zLibrary& lib, std::istream& inArchive, const BitInFormat& format = BitFormat::Auto, const tstring& password = {} )
Constructs a BitArchiveReader object, opening the archive from the standard input stream.
Note
When bit7z is compiled using the BIT7Z_AUTO_FORMAT option, the format argument has the default value BitFormat::Auto (automatic format detection of the input archive). On the contrary, when BIT7Z_AUTO_FORMAT is not defined (i.e., no auto format detection available), the format argument must be specified.
Parameters:
- lib: the 7z library used.
- inArchive: the standard input stream of the archive to be read.
- format: the format of the input archive.
- password: the password needed for opening the input archive.
BitArchiveReader destructor.
Note
It releases the input archive file.
const tstring & archivePath() const noexcept
Returns the path to the archive (the empty string for buffer/stream archives).
map< BitProperty, BitPropVariant > archiveProperties() const
Returns a map of all the available (i.e., non-empty) archive properties and their respective values.
BitPropVariant archiveProperty( BitProperty property ) const
Gets the specified archive property.
Parameters:
- property: the property to be retrieved.
Returns the current value of the archive property or an empty BitPropVariant if no value is specified.
BitInputArchive::ConstIterator begin() const noexcept
Returns an iterator to the first element of the archive; if the archive is empty, the returned iterator will be equal to the end() iterator.
BitInputArchive::ConstIterator cbegin() const noexcept
Returns an iterator to the first element of the archive; if the archive is empty, the returned iterator will be equal to the end() iterator.
BitInputArchive::ConstIterator cend() const noexcept
Returns an iterator to the element following the last element of the archive; this element acts as a placeholder: attempting to access it results in undefined behavior.
Clear the current password used by the handler. Calling clearPassword() will disable the encryption/decryption of archives.
Note
This is equivalent to calling setPassword(L"").
bool contains( const tstring& path ) const noexcept
Find if there is an item in the archive that has the given path.
Parameters:
- path: the path to be searched in the archive.
Returns true if and only if an item with the given path exists in the archive.
const BitInFormat & detectedFormat() const noexcept
Returns the detected format of the file.
BitInputArchive::ConstIterator end() const noexcept
Returns an iterator to the element following the last element of the archive; this element acts as a placeholder: attempting to access it results in undefined behavior.
const BitInFormat & extractionFormat() const noexcept
Returns the archive format used by the archive opener.
void extractTo( byte_t* buffer, std::size_t size, uint32_t index = 0 ) const
Extracts a file to the pre-allocated output buffer.
Parameters:
- buffer: the pre-allocated output buffer.
- size: the size of the output buffer (it must be equal to the unpacked size of the item to be extracted).
- index: the index of the file to be extracted.
void extractTo( byte_t(&) buffer, uint32_t index = 0 ) const
Extracts a file to the pre-allocated output buffer.
Parameters:
- buffer: the pre-allocated output buffer.
- index: the index of the file to be extracted.
void extractTo( const tstring& outDir ) const
Extracts the archive to the chosen directory.
Parameters:
- outDir: the output directory where the extracted files will be put.
void extractTo( const tstring& outDir, const std::vector< uint32_t >& indices ) const
Extracts the specified items to the chosen directory.
Parameters:
- outDir: the output directory where the extracted files will be put.
- indices: the array of indices of the files in the archive that must be extracted.
void extractTo( std::array< byte_t, N >& buffer, uint32_t index = 0 ) const
Extracts a file to the pre-allocated output buffer.
Parameters:
- buffer: the pre-allocated output buffer.
- index: the index of the file to be extracted.
void extractTo( std::map< tstring, std::vector< byte_t > >& outMap ) const
Extracts the content of the archive to a map of memory buffers, where the keys are the paths of the files (inside the archive), and the values are their decompressed contents.
Parameters:
- outMap: the output map.
void extractTo( std::ostream& outStream, uint32_t index = 0 ) const
Extracts a file to the output stream.
Parameters:
- outStream: the (binary) stream where the content of the archive will be put.
- index: the index of the file to be extracted.
void extractTo( std::vector< byte_t >& outBuffer, uint32_t index = 0 ) const
Extracts a file to the output buffer.
Parameters:
- outBuffer: the output buffer where the content of the archive will be put.
- index: the index of the file to be extracted.
FileCallback fileCallback() const
Returns the current file callback.
Returns the number of files contained in the archive.
BitInputArchive::ConstIterator find( const tstring& path ) const noexcept
Find an item in the archive that has the given path.
Parameters:
- path: the path to be searched in the archive.
Returns an iterator to the item with the given path, or an iterator equal to the end() iterator if no item is found.
Returns the number of folders contained in the archive.
[virtual] const BitInFormat &override format() const noexcept
Returns the archive format used by the archive opener.
const BitAbstractArchiveHandler & handler() const noexcept
Returns the BitAbstractArchiveHandler object containing the settings for reading the archive.
Returns true if and only if the archive has at least one encrypted item.
Returns true if and only if the archive has only encrypted items.
Parameters:
- index: the index of an item in the archive.
Returns true if and only if the item at the given index is encrypted.
Parameters:
- index: the index of an item in the archive.
Returns true if and only if the item at the given index is a folder.
Returns true if and only if the archive is composed by multiple volumes.
Returns a boolean value indicating whether a password is defined or not.
Returns true if and only if the archive was created using solid compression.
BitArchiveItemOffset itemAt( uint32_t index ) const
Retrieve the item at the given index.
Parameters:
- index: the index of the item to be retrieved.
Returns the item at the given index within the archive.
BitPropVariant itemProperty( uint32_t index, BitProperty property ) const
Gets the specified property of an item in the archive.
Parameters:
- index: the index (in the archive) of the item.
- property: the property to be retrieved.
Returns the current value of the item property or an empty BitPropVariant if the item has no value for the property.
vector< BitArchiveItemInfo > items() const
Returns a vector of all the archive items as BitArchiveItem objects.
Returns the number of items contained in the archive.
const Bit7zLibrary & library() const noexcept
Returns the Bit7zLibrary object used by the handler.
OverwriteMode overwriteMode() const
Returns the current OverwriteMode.
Returns the total compressed size of the archive content.
tstring password() const
Returns the password used to open, extract, or encrypt the archive.
PasswordCallback passwordCallback() const
Returns the current password callback.
ProgressCallback progressCallback() const
Returns the current progress callback.
RatioCallback ratioCallback() const
Returns the current ratio callback.
Returns a boolean value indicating whether the directory structure must be preserved while extracting or compressing the archive.
void setFileCallback( const FileCallback& callback )
Sets the function to be called when the current file being processed changes.
Parameters:
- callback: the file callback to be used.
void setOverwriteMode( OverwriteMode mode )
Sets how the handler should behave when it tries to output to an existing file or buffer.
Parameters:
- mode: the OverwriteMode to be used by the handler.
[virtual] void setPassword( const tstring& password )
Sets up a password to be used by the archive handler. The password will be used to encrypt/decrypt archives by using the default cryptographic method of the archive format.
Note
Calling setPassword when the input archive is not encrypted does not have any effect on the extraction process.
Note
Calling setPassword when the output format doesn't support archive encryption (e.g., GZip, BZip2, etc...) does not have any effects (in other words, it doesn't throw exceptions, and it has no effects on compression operations).
Note
After a password has been set, it will be used for every subsequent operation. To disable the use of the password, you need to call the clearPassword method, which is equivalent to calling setPassword(L"").
Parameters:
- password: the password to be used.
void setPasswordCallback( const PasswordCallback& callback )
Sets the function to be called when a password is needed to complete the ongoing operation.
Parameters:
- callback: the password callback to be used.
void setProgressCallback( const ProgressCallback& callback )
Sets the function to be called when the processed size of the ongoing operation is updated.
Note
The completion percentage of the current operation can be obtained by calculating static_cast<int>((100.0 * processed_size) / total_size).
Parameters:
- callback: the progress callback to be used.
void setRatioCallback( const RatioCallback& callback )
Sets the function to be called when the input processed size and current output size of the ongoing operation are known.
Note
The ratio percentage of a compression operation can be obtained by calculating static_cast<int>((100.0 * output_size) / input_size).
Parameters:
- callback: the ratio callback to be used.
Sets whether the operations' output will preserve the input's directory structure or not.
Parameters:
- retain: the setting for preserving or not the input directory structure
void setTotalCallback( const TotalCallback& callback )
Sets the function to be called when the total size of an operation is available.
Parameters:
- callback: the total callback to be used.
Returns the total uncompressed size of the archive content.
Tests the archive without extracting its content. If the archive is not valid, a BitException is thrown!
Tests the item at the given index inside the archive without extracting it. If the archive is not valid, or there's no item at the given index, a BitException is thrown!
Parameters:
- index: the index of the file to be tested.
TotalCallback totalCallback() const
Returns the current total callback.
Returns the number of volumes composing the archive.
[static] bool isEncrypted( const Bit7zLibrary& lib, T&& inArchive, const BitInFormat& format = BitFormat::Auto )
Checks if the given archive contains only encrypted items.
Note
A header-encrypted archive is also encrypted, but the contrary is not generally true.
Note
An archive might contain both plain and encrypted files; in this case, this function will return false.
Parameters:
- lib: the 7z library used.
- inArchive: the archive to be read.
- format: the format of the input archive.
Returns true if and only if the archive has only encrypted items.
[static] bool isHeaderEncrypted( const Bit7zLibrary& lib, T&& inArchive, const BitInFormat& format = BitFormat::Auto )
Checks if the given archive is header-encrypted or not.
Parameters:
- lib: the 7z library used.
- inArchive: the archive to be read.
- format: the format of the input archive.
Returns true if and only if the archive has at least one encrypted item.
Copyright © 2014 - 2024 Riccardo Ostani (@rikyoz)
- Bit7zLibrary
- BitArchiveEditor
- BitArchiveReader
- BitArchiveWriter
- BitException
- BitFileCompressor
- BitFileExtractor
- BitMemCompressor
- BitMemExtractor
- BitStreamCompressor
- BitStreamExtractor
- BitInFormat