From: Michael McMaster Date: Thu, 10 Feb 2011 05:30:27 +0000 (+1000) Subject: Unzip works! X-Git-Tag: v1.0.0~5 X-Git-Url: http://git.codesrc.com/gitweb.cgi?a=commitdiff_plain;h=f497b6f600b0d9138a4de7dabef3d63716484071;p=libzipper.git Unzip works! --- f497b6f600b0d9138a4de7dabef3d63716484071 diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..e425104 --- /dev/null +++ b/.gitignore @@ -0,0 +1,12 @@ +Makefile.in +aclocal.m4 +autoconfig.h.in +autoconfig.h.in~ +autom4te.cache/ +config.guess +config.sub +configure +depcomp +install-sh +ltmain.sh +missing diff --git a/COPYING b/COPYING new file mode 100644 index 0000000..94a9ed0 --- /dev/null +++ b/COPYING @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + Copyright (C) + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. diff --git a/CompressedFile.cc b/CompressedFile.cc new file mode 100644 index 0000000..6f03c6b --- /dev/null +++ b/CompressedFile.cc @@ -0,0 +1,26 @@ +// Copyright (C) 2011 Michael McMaster +// +// This file is part of libzipper. +// +// libzipper is free software: you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. +// +// libzipper is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with libzipper. If not, see . + +#include "zipper.hh" + +using namespace zipper; + +CompressedFile::~CompressedFile() +{ +} + + diff --git a/Consumer.cc b/Consumer.cc new file mode 100644 index 0000000..fd102b8 --- /dev/null +++ b/Consumer.cc @@ -0,0 +1,25 @@ +// Copyright (C) 2011 Michael McMaster +// +// This file is part of libzipper. +// +// libzipper is free software: you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. +// +// libzipper is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with libzipper. If not, see . + +#include "zipper.hh" + +using namespace zipper; + +Consumer::~Consumer() +{ +} + diff --git a/Exception.cc b/Exception.cc new file mode 100644 index 0000000..0d82600 --- /dev/null +++ b/Exception.cc @@ -0,0 +1,36 @@ +// Copyright (C) 2011 Michael McMaster +// +// This file is part of libzipper. +// +// libzipper is free software: you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. +// +// libzipper is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with libzipper. If not, see . + +#include "zipper.hh" + +using namespace zipper; + +ZipException::ZipException(const std::string& what) : + std::runtime_error(what) +{ +} + +ZipFormatException::ZipFormatException(const std::string& what) : + ZipException(what) +{ +} + +ZipUnsupportedException::ZipUnsupportedException(const std::string& what) : + ZipException(what) +{ +} + diff --git a/Makefile.am b/Makefile.am new file mode 100644 index 0000000..aa6d4ec --- /dev/null +++ b/Makefile.am @@ -0,0 +1,48 @@ +# Copyright (C) 2011 Michael McMaster +# +# This file is part of libzipper. +# +# libzipper is free software: you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. +# +# libzipper is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with libzipper. If not, see . + +dist_noinst_SCRIPTS = autogen.sh + +EXTRA_DIST = \ + configure.ac \ + Makefile.am \ + COPYING \ + NEWS \ + README \ + VERSION + +lib_LTLIBRARIES = libzipper.la +libzipper_la_SOURCES = \ + CompressedFile.cc \ + Consumer.cc \ + Exception.cc \ + Provider.cc \ + Unzip.cc \ + zipper.hh + +libzipper_la_LDFLAGS = ${ZLIB_LIBS} +libzipper_la_CFLAGS = ${ZLIB_CFLAGS} + +bin_PROGRAMS = zipper + +zipper_SOURCES = \ + zipper.cc + +zipper_LDADD = libzipper.la + +CXXFLAGS=-g -O2 -W -Wall -Werror -std=c++0x + diff --git a/NEWS b/NEWS new file mode 100644 index 0000000..2faeb53 --- /dev/null +++ b/NEWS @@ -0,0 +1,3 @@ +2011-01-31 Version 1.0.0 + - Initial release + diff --git a/Provider.cc b/Provider.cc new file mode 100644 index 0000000..474ad71 --- /dev/null +++ b/Provider.cc @@ -0,0 +1,25 @@ +// Copyright (C) 2011 Michael McMaster +// +// This file is part of libzipper. +// +// libzipper is free software: you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. +// +// libzipper is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with libzipper. If not, see . + +#include "zipper.hh" + +using namespace zipper; + +Provider::~Provider() +{ +} + diff --git a/README b/README new file mode 100644 index 0000000..bbdb593 --- /dev/null +++ b/README @@ -0,0 +1,17 @@ +libzipper +Michael McMaster + +Flexible C++ interface for reading compressed files in +multiple formats. + +Supported Formats + - raw (ie. not compressed) + - ZIP + +Missing Features + - zip64 support + - compression + +Requirements + - zlib + diff --git a/Unzip.cc b/Unzip.cc new file mode 100644 index 0000000..6e2253c --- /dev/null +++ b/Unzip.cc @@ -0,0 +1,448 @@ +// Copyright (C) 2011 Michael McMaster +// +// This file is part of libzipper. +// +// libzipper is free software: you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. +// +// libzipper is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with libzipper. If not, see . + +#include "zipper.hh" + +#include + +#include +#include +#include + +using namespace zipper; + +namespace +{ + uint32_t + read32(const std::vector& zipData, size_t pos) + { + // Read 4 bytes in little-endian order. + // Return results in host-endian. + return uint32_t( + zipData[pos] | + (uint32_t(zipData[pos+1]) << 8) | + (uint32_t(zipData[pos+2]) << 16) | + (uint32_t(zipData[pos+3]) << 24) + ); + } + + uint16_t + read16(const std::vector& zipData, size_t pos) + { + // Read 2 bytes in little-endian order. + // Return results in host-endian. + return uint16_t( + zipData[pos] | + (uint16_t(zipData[pos+1]) << 8) + ); + } + + struct InflateDeleter + { + public: + InflateDeleter(z_stream* stream) : m_stream(stream) {} + ~InflateDeleter() + { + inflateEnd(m_stream); + + } + private: + z_stream* m_stream; + }; + + class FileEntry : public CompressedFile + { + public: + FileEntry( + ProviderPtr provider, + uint16_t versionNeeded, + uint16_t gpFlag, + uint16_t compressionMethod, + uint16_t lastModTime, + uint16_t lastModDate, + uint32_t crc32, + uint32_t compressedSize, + uint32_t uncompressedSize, + uint32_t localHeaderOffset, + std::string fileName, + std::string extra, + std::string comment + ) : + m_provider(provider), + m_versionNeeded(versionNeeded), + m_gpFlag(gpFlag), + m_compressionMethod(compressionMethod), + m_lastModTime(lastModTime), + m_lastModDate(lastModDate), + m_crc32(crc32), + m_compressedSize(compressedSize), + m_uncompressedSize(uncompressedSize), + m_localHeaderOffset(localHeaderOffset), + m_fileName(fileName), + m_extra(extra), + m_comment(comment) + { + } + + virtual bool isValid() const + { + return ((m_versionNeeded & 0xf) <= 20) && + ((m_gpFlag & 0x1) == 0) && // Not encrypted + (m_compressionMethod <= 8); + } + + virtual void uncompress(Consumer& consumer) + { + enum + { + Signature = 0x04034b50, + MinRecordBytes = 30, + ChunkSize = 64*1024, + WindowBits = 15 + }; + + std::vector localRecord(MinRecordBytes); + m_provider->zip_readData( + m_localHeaderOffset, MinRecordBytes, &localRecord[0] + ); + if (read32(localRecord, 0) != Signature) + { + throw ZipFormatException("Invalid local ZIP record"); + } + + // Don't trust the lengths for filename and extra content read from + // the central records. At least for extra, these DO differ for + // unknown reasons + size_t filenameLength(read16(localRecord, 26)); + size_t extraLength(read16(localRecord, 28)); + + zoff64_t startCompressedBytes( + m_localHeaderOffset + + MinRecordBytes + + filenameLength + + extraLength + ); + + zoff64_t endCompressedBytes( + startCompressedBytes + m_compressedSize + ); + + if (endCompressedBytes > m_provider->zip_getSize()) + { + throw ZipFormatException("Compressed file size is too long"); + } + + switch (m_compressionMethod) + { + case 0: // No compression + { + for (zoff64_t pos(startCompressedBytes); + pos < endCompressedBytes; + pos += ChunkSize + ) + { + uint8_t buf[ChunkSize]; + size_t bytes( + std::min(zoff64_t(ChunkSize), endCompressedBytes - pos) + ); + m_provider->zip_readData(pos, bytes, &buf[0]); + consumer.zip_writeData(bytes, &buf[0]); + } + }; break; + + case 8: // Deflate + { + uint8_t inChunk[ChunkSize]; + uint8_t outChunk[ChunkSize]; + + z_stream stream; + stream.zalloc = NULL; + stream.zfree = NULL; + stream.opaque = NULL; + int zlibErr(inflateInit2(&stream, -WindowBits)); + assert(zlibErr == Z_OK); + InflateDeleter deleter(&stream); + stream.next_in = NULL; + stream.avail_in = 0; + + for (zoff64_t pos(startCompressedBytes); + pos < endCompressedBytes; + pos += ChunkSize + ) + { + if (stream.avail_in == 0) + { + stream.avail_in = + std::min( + zoff64_t(ChunkSize), + endCompressedBytes - pos + ); + m_provider->zip_readData( + pos, stream.avail_in, &inChunk[0] + ); + stream.next_in = reinterpret_cast(&inChunk); + } + + stream.next_out = reinterpret_cast(&outChunk); + stream.avail_out = sizeof(outChunk); + + zlibErr = inflate(&stream, Z_SYNC_FLUSH); + + bool finished(false); + if (zlibErr == Z_STREAM_END) + { + finished = true; + } + else if (zlibErr != Z_OK) + { + throw ZipFormatException("Corrupt Data"); + } + + consumer.zip_writeData( + sizeof(outChunk) - stream.avail_out, + &outChunk[0] + ); + + if (finished) break; + } + }; break; + + default: + throw ZipUnsupportedException("Unsupported compression scheme"); + }; + } + + private: + ProviderPtr m_provider; + uint16_t m_versionNeeded; + uint16_t m_gpFlag; + uint16_t m_compressionMethod; + uint16_t m_lastModTime; + uint16_t m_lastModDate; + uint32_t m_crc32; + uint32_t m_compressedSize; + uint32_t m_uncompressedSize; + uint32_t m_localHeaderOffset; + std::string m_fileName; + std::string m_extra; + std::string m_comment; + }; +} + +class Unzip::UnzipImpl +{ +public: + UnzipImpl(const ProviderPtr& provider) : + m_provider(provider) + { + readCentralDirectory(); + } + + std::vector + getEntries() const + { + return m_entries; + } + +private: + ProviderPtr m_provider; + std::vector m_entries; + + struct EndCentralDirectory + { + size_t centralDirectoryBytes; + size_t centralDirectoryOffset; + size_t centralDirectoryEntries; + std::string zipFileComment; + }; + EndCentralDirectory m_endCentralDirectory; + + void readCentralDirectory() + { + enum + { + MinRecordBytes = 46, + Signature = 0x02014b50 + }; + + readEndCentralDirectory(); + + std::vector buffer( + m_endCentralDirectory.centralDirectoryBytes + ); + m_provider->zip_readData( + m_endCentralDirectory.centralDirectoryOffset, + m_endCentralDirectory.centralDirectoryBytes, + &buffer[0] + ); + + size_t pos(0); + while ((pos + MinRecordBytes) < buffer.size()) + { + if (read32(buffer, pos) != Signature) + { + // Unknown record type. + pos += 1; + continue; + } + + uint16_t versionNeeded(read16(buffer, pos + 6)); + uint16_t gpFlag(read16(buffer, pos + 8)); + uint16_t compressionMethod(read16(buffer, pos + 10)); + uint16_t lastModTime(read16(buffer, pos + 12)); + uint16_t lastModDate(read16(buffer, pos + 14)); + uint32_t crc32(read32(buffer, pos + 16)); + uint32_t compressedSize(read32(buffer, pos + 20)); + uint32_t uncompressedSize(read32(buffer, pos + 24)); + size_t fileNameLen(read16(buffer, pos + 28)); + size_t extraLen(read16(buffer, pos + 30)); + size_t commentLen(read16(buffer, pos + 32)); + uint32_t localHeaderOffset(read32(buffer, pos + 42)); + + if ((fileNameLen + extraLen + commentLen + MinRecordBytes + pos) > + buffer.size() + ) + { + throw ZipFormatException("File comments are too long"); + } + + std::string fileName( + &buffer[pos + MinRecordBytes], + &buffer[pos + MinRecordBytes + fileNameLen] + ); + + std::string extra( + &buffer[pos+MinRecordBytes+fileNameLen], + &buffer[pos+MinRecordBytes+fileNameLen+extraLen] + ); + + std::string comment( + &buffer[pos+MinRecordBytes+fileNameLen+extraLen], + &buffer[pos+MinRecordBytes+fileNameLen+extraLen+commentLen] + ); + + m_entries.push_back( + CompressedFilePtr( + new FileEntry( + m_provider, + versionNeeded, + gpFlag, + compressionMethod, + lastModTime, + lastModDate, + crc32, + compressedSize, + uncompressedSize, + localHeaderOffset, + fileName, + extra, + comment + ) + ) + ); + + pos += MinRecordBytes + fileNameLen + extraLen + commentLen; + } + } + + void readEndCentralDirectory() + { + // Read the end of central directory record. This + // record enables us to find the remainding + // records without searching for record signatures. + + // TODO does not consider the Zip64 entries. + + enum + { + MinRecordBytes = 22, // Minimum size with no comment + MaxCommentBytes = 65535, // 2 bytes to store comment length + Signature = 0x06054b50 + }; + + zoff64_t providerSize(m_provider->zip_getSize()); + if (providerSize < MinRecordBytes) + { + throw ZipFormatException("Too small"); + } + + size_t bufSize( + std::min(zoff64_t(MinRecordBytes + MaxCommentBytes), providerSize) + ); + std::vector buffer(bufSize); + m_provider->zip_readData(providerSize - bufSize, bufSize, &buffer[0]); + + // Need to search for this record, as it ends in a variable-length + // comment field. Search backwards, with the assumption that the + // comment doesn't exist, or is much smaller than the maximum + // length + + bool recordFound(false); + ssize_t pos(bufSize - MinRecordBytes); + for (; pos >= 0; --pos) + { + recordFound = (read32(buffer, pos) == Signature); + break; + } + + if (!recordFound) + { + throw ZipFormatException("ZIP directory records not found"); + } + + if (read16(buffer, pos + 4) != 0) + { + throw ZipUnsupportedException("Spanned disks not supported"); + } + + m_endCentralDirectory.centralDirectoryBytes = read32(buffer, pos + 12); + m_endCentralDirectory.centralDirectoryOffset = + read32(buffer, pos + 16); + m_endCentralDirectory.centralDirectoryEntries = + read16(buffer, pos + 10); + + size_t commentLength(read16(buffer, pos + 20)); + size_t commentStart(pos + MinRecordBytes); + if (commentStart + commentLength > bufSize) + { + throw ZipFormatException("ZIP comment is too long"); + } + m_endCentralDirectory.zipFileComment = + std::string( + &buffer[commentStart], + &buffer[commentStart + commentLength] + ); + } + +}; + +Unzip::Unzip(const ProviderPtr& provider) : + m_unzipper(new UnzipImpl(provider)) +{ +} + +Unzip::~Unzip() +{ + delete m_unzipper; +} + +std::vector +Unzip::getEntries() const +{ + return m_unzipper->getEntries(); +} + diff --git a/VERSION b/VERSION new file mode 100644 index 0000000..3eefcb9 --- /dev/null +++ b/VERSION @@ -0,0 +1 @@ +1.0.0 diff --git a/autogen.sh b/autogen.sh new file mode 100755 index 0000000..3f026c4 --- /dev/null +++ b/autogen.sh @@ -0,0 +1,2 @@ +#!/bin/sh +autoreconf --force --install diff --git a/configure.ac b/configure.ac new file mode 100644 index 0000000..69c6c96 --- /dev/null +++ b/configure.ac @@ -0,0 +1,33 @@ +# Copyright (C) 2011 Michael McMaster +# +# This file is part of libzipper. +# +# libzipper is free software: you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. +# +# libzipper is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with libzipper. If not, see . + +AC_INIT([libzipper], [1.0.0], [michael@codesrc.com]) +AC_CANONICAL_HOST +AC_CANONICAL_TARGET +AM_INIT_AUTOMAKE([foreign]) +AC_CONFIG_HEADERS([autoconfig.h]) +AC_CONFIG_FILES([Makefile]) + +AC_PROG_CXX +AC_PROG_LIBTOOL + +PKG_CHECK_MODULES([ZLIB], [zlib >= 1.2.3],, + AC_MSG_ERROR([zlib 1.2.3 or newer not found.]) +) + +AC_OUTPUT + diff --git a/zipper.cc b/zipper.cc new file mode 100644 index 0000000..323aee8 --- /dev/null +++ b/zipper.cc @@ -0,0 +1,89 @@ +// Copyright (C) 2011 Michael McMaster +// +// This file is part of libzipper. +// +// libzipper is free software: you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. +// +// libzipper is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with libzipper. If not, see . + +#include "zipper.hh" + +#include + +#include +#include +#include + +using namespace zipper; + +class BasicBuffer : public Provider, public Consumer +{ +public: + BasicBuffer() + { + } + + BasicBuffer(const std::vector& buffer) : + m_buffer(buffer) + { + } + + const std::vector& getBuffer() const { return m_buffer; } + + virtual zoff64_t zip_getSize() const { return m_buffer.size(); } + + virtual void zip_readData( + zoff64_t offset, size_t bytes, uint8_t* dest + ) const + { + assert(offset + bytes <= m_buffer.size()); + for (size_t i(0); i < bytes; ++i) + { + dest[i] = m_buffer[offset + i]; + } + } + + virtual void zip_writeData( + size_t bytes, const uint8_t* data + ) + { + m_buffer.insert(m_buffer.begin(), data, data + bytes); + } +private: + std::vector m_buffer; +}; + + +int main() +{ + int fd(open("test.zip", O_RDONLY)); + + std::vector buf(256*1024); + size_t bytes(::read(fd, &buf[0], buf.size())); + buf.resize(bytes); + + std::shared_ptr basicBuffer( + new BasicBuffer(buf) + ); + + Unzip unzip(basicBuffer); + std::vector entries(unzip.getEntries()); + for (size_t f = 0; f < entries.size(); ++f) + { + BasicBuffer out; + entries[f]->uncompress(out); + + int fout(open("zipOutput", O_WRONLY | O_CREAT | O_TRUNC, 0660)); + ::write(fout, &out.getBuffer()[0], out.getBuffer().size()); + close(fout); + } +} diff --git a/zipper.hh b/zipper.hh new file mode 100644 index 0000000..9cd68a6 --- /dev/null +++ b/zipper.hh @@ -0,0 +1,96 @@ +// Copyright (C) 2011 Michael McMaster +// +// This file is part of libzipper. +// +// libzipper is free software: you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. +// +// libzipper is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with libzipper. If not, see . + +#include +#include +#include +#include + +#include // size_t +#include + + +namespace zipper +{ + typedef uint64_t zoff64_t; + + class ZipException : public std::runtime_error + { + public: + ZipException(const std::string& what); + }; + + class ZipFormatException : public ZipException + { + public: + ZipFormatException(const std::string& what); + }; + + class ZipUnsupportedException : public ZipException + { + public: + ZipUnsupportedException(const std::string& what); + }; + + class Provider + { + public: + virtual ~Provider(); + + virtual zoff64_t zip_getSize() const = 0; + + virtual void zip_readData( + zoff64_t offset, size_t bytes, uint8_t* dest + ) const = 0; + }; + typedef std::shared_ptr ProviderPtr; + + class Consumer + { + public: + virtual ~Consumer(); + + virtual void zip_writeData( + size_t bytes, const uint8_t* data + ) = 0; + }; + + class CompressedFile + { + public: + virtual ~CompressedFile(); + virtual bool isValid() const = 0; + virtual void uncompress(Consumer& consumer) = 0; + }; + typedef std::shared_ptr CompressedFilePtr; + +// NO! Rename to Decompress. We want this to work for -any- container! +// bz2, tar, iso, gz, rar +// Similarly, rename the exceptions. + class Unzip + { + public: + Unzip(const ProviderPtr& provider); + ~Unzip(); + + std::vector getEntries() const; + private: + class UnzipImpl; + UnzipImpl* m_unzipper; + }; +} +