tools/zipalign/ZipEntry.h - platform/build - Git at Google

 /*
  * Copyright (C) 2006 The Android Open Source Project
  *
  * 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.
  */

 //
 // Zip archive entries.
 //
 // The ZipEntry class is tightly meshed with the ZipFile class.
 //
 #ifndef __LIBS_ZIPENTRY_H
 #define __LIBS_ZIPENTRY_H

 #include <utils/Errors.h>

 #include <stdlib.h>
 #include <stdio.h>

 namespace android {

 class ZipFile;

 /*
  * ZipEntry objects represent a single entry in a Zip archive.
  *
  * You can use one of these to get or set information about an entry, but
  * there are no functions here for accessing the data itself.  (We could
  * tuck a pointer to the ZipFile in here for convenience, but that raises
  * the likelihood of using ZipEntry objects after discarding the ZipFile.)
  *
  * File information is stored in two places: next to the file data (the Local
  * File Header, and possibly a Data Descriptor), and at the end of the file
  * (the Central Directory Entry).  The two must be kept in sync.
  */
 class ZipEntry {
 public:
     friend class ZipFile;

     ZipEntry(void)
         : mDeleted(false), mMarked(false)
         {}
     ~ZipEntry(void) {}

     /*
      * Returns "true" if the data is compressed.
      */
     bool isCompressed(void) const {
         return mCDE.mCompressionMethod != kCompressStored;
     }
     int getCompressionMethod(void) const { return mCDE.mCompressionMethod; }

     /*
      * Return the uncompressed length.
      */
     off_t getUncompressedLen(void) const { return mCDE.mUncompressedSize; }

     /*
      * Return the compressed length.  For uncompressed data, this returns
      * the same thing as getUncompresesdLen().
      */
     off_t getCompressedLen(void) const { return mCDE.mCompressedSize; }

     /*
      * Return the absolute file offset of the start of the compressed or
      * uncompressed data.
      */
     off_t getFileOffset(void) const {
         return mCDE.mLocalHeaderRelOffset +
                 LocalFileHeader::kLFHLen +
                 mLFH.mFileNameLength +
                 mLFH.mExtraFieldLength;
     }

     /*
      * Return the data CRC.
      */
     unsigned long getCRC32(void) const { return mCDE.mCRC32; }

     /*
      * Return file modification time in UNIX seconds-since-epoch.
      */
     time_t getModWhen(void) const;

     /*
      * Return the archived file name.
      */
     const char* getFileName(void) const { return (const char*) mCDE.mFileName; }

     /*
      * Application-defined "mark".  Can be useful when synchronizing the
      * contents of an archive with contents on disk.
      */
     bool getMarked(void) const { return mMarked; }
     void setMarked(bool val) { mMarked = val; }

     /*
      * Some basic functions for raw data manipulation.  "LE" means
      * Little Endian.
      */
     static inline unsigned short getShortLE(const unsigned char* buf) {
         return buf[0] | (buf[1] << 8);
     }
     static inline unsigned long getLongLE(const unsigned char* buf) {
         return buf[0] | (buf[1] << 8) | (buf[2] << 16) | (buf[3] << 24);
     }
     static inline void putShortLE(unsigned char* buf, short val) {
         buf[0] = (unsigned char) val;
         buf[1] = (unsigned char) (val >> 8);
     }
     static inline void putLongLE(unsigned char* buf, long val) {
         buf[0] = (unsigned char) val;
         buf[1] = (unsigned char) (val >> 8);
         buf[2] = (unsigned char) (val >> 16);
         buf[3] = (unsigned char) (val >> 24);
     }

     /* defined for Zip archives */
     enum {
         kCompressStored     = 0,        // no compression
         // shrunk           = 1,
         // reduced 1        = 2,
         // reduced 2        = 3,
         // reduced 3        = 4,
         // reduced 4        = 5,
         // imploded         = 6,
         // tokenized        = 7,
         kCompressDeflated   = 8,        // standard deflate
         // Deflate64        = 9,
         // lib imploded     = 10,
         // reserved         = 11,
         // bzip2            = 12,
     };

     /*
      * Deletion flag.  If set, the entry will be removed on the next
      * call to "flush".
      */
     bool getDeleted(void) const { return mDeleted; }

 protected:
     /*
      * Initialize the structure from the file, which is pointing at
      * our Central Directory entry.
      */
     status_t initFromCDE(FILE* fp);

     /*
      * Initialize the structure for a new file.  We need the filename
      * and comment so that we can properly size the LFH area.  The
      * filename is mandatory, the comment is optional.
      */
     void initNew(const char* fileName, const char* comment);

     /*
      * Initialize the structure with the contents of a ZipEntry from
      * another file.
      */
     status_t initFromExternal(const ZipFile* pZipFile, const ZipEntry* pEntry);

     /*
      * Add some pad bytes to the LFH.  We do this by adding or resizing
      * the "extra" field.
      */
     status_t addPadding(int padding);

     /*
      * Set information about the data for this entry.
      */
     void setDataInfo(long uncompLen, long compLen, unsigned long crc32,
         int compressionMethod);

     /*
      * Set the modification date.
      */
     void setModWhen(time_t when);

     /*
      * Return the offset of the local file header.
      */
     off_t getLFHOffset(void) const { return mCDE.mLocalHeaderRelOffset; }

     /*
      * Set the offset of the local file header, relative to the start of
      * the current file.
      */
     void setLFHOffset(off_t offset) {
         mCDE.mLocalHeaderRelOffset = (long) offset;
     }

     /* mark for deletion; used by ZipFile::remove() */
     void setDeleted(void) { mDeleted = true; }

 private:
     /* these are private and not defined */
     ZipEntry(const ZipEntry& src);
     ZipEntry& operator=(const ZipEntry& src);

     /* returns "true" if the CDE and the LFH agree */
     bool compareHeaders(void) const;
     void copyCDEtoLFH(void);

     bool        mDeleted;       // set if entry is pending deletion
     bool        mMarked;        // app-defined marker

     /*
      * Every entry in the Zip archive starts off with one of these.
      */
     class LocalFileHeader {
     public:
         LocalFileHeader(void) :
             mVersionToExtract(0),
             mGPBitFlag(0),
             mCompressionMethod(0),
             mLastModFileTime(0),
             mLastModFileDate(0),
             mCRC32(0),
             mCompressedSize(0),
             mUncompressedSize(0),
             mFileNameLength(0),
             mExtraFieldLength(0),
             mFileName(NULL),
             mExtraField(NULL)
         {}
         virtual ~LocalFileHeader(void) {
             delete[] mFileName;
             delete[] mExtraField;
         }

         status_t read(FILE* fp);
         status_t write(FILE* fp);

         // unsigned long mSignature;
         unsigned short  mVersionToExtract;
         unsigned short  mGPBitFlag;
         unsigned short  mCompressionMethod;
         unsigned short  mLastModFileTime;
         unsigned short  mLastModFileDate;
         unsigned long   mCRC32;
         unsigned long   mCompressedSize;
         unsigned long   mUncompressedSize;
         unsigned short  mFileNameLength;
         unsigned short  mExtraFieldLength;
         unsigned char*  mFileName;
         unsigned char*  mExtraField;

         enum {
             kSignature      = 0x04034b50,
             kLFHLen         = 30,       // LocalFileHdr len, excl. var fields
         };

         void dump(void) const;
     };

     /*
      * Every entry in the Zip archive has one of these in the "central
      * directory" at the end of the file.
      */
     class CentralDirEntry {
     public:
         CentralDirEntry(void) :
             mVersionMadeBy(0),
             mVersionToExtract(0),
             mGPBitFlag(0),
             mCompressionMethod(0),
             mLastModFileTime(0),
             mLastModFileDate(0),
             mCRC32(0),
             mCompressedSize(0),
             mUncompressedSize(0),
             mFileNameLength(0),
             mExtraFieldLength(0),
             mFileCommentLength(0),
             mDiskNumberStart(0),
             mInternalAttrs(0),
             mExternalAttrs(0),
             mLocalHeaderRelOffset(0),
             mFileName(NULL),
             mExtraField(NULL),
             mFileComment(NULL)
         {}
         virtual ~CentralDirEntry(void) {
             delete[] mFileName;
             delete[] mExtraField;
             delete[] mFileComment;
         }

         status_t read(FILE* fp);
         status_t write(FILE* fp);

         // unsigned long mSignature;
         unsigned short  mVersionMadeBy;
         unsigned short  mVersionToExtract;
         unsigned short  mGPBitFlag;
         unsigned short  mCompressionMethod;
         unsigned short  mLastModFileTime;
         unsigned short  mLastModFileDate;
         unsigned long   mCRC32;
         unsigned long   mCompressedSize;
         unsigned long   mUncompressedSize;
         unsigned short  mFileNameLength;
         unsigned short  mExtraFieldLength;
         unsigned short  mFileCommentLength;
         unsigned short  mDiskNumberStart;
         unsigned short  mInternalAttrs;
         unsigned long   mExternalAttrs;
         unsigned long   mLocalHeaderRelOffset;
         unsigned char*  mFileName;
         unsigned char*  mExtraField;
         unsigned char*  mFileComment;

         void dump(void) const;

         enum {
             kSignature      = 0x02014b50,
             kCDELen         = 46,       // CentralDirEnt len, excl. var fields
         };
     };

     enum {
         //kDataDescriptorSignature  = 0x08074b50,   // currently unused
         kDataDescriptorLen  = 16,           // four 32-bit fields

         kDefaultVersion     = 20,           // need deflate, nothing much else
         kDefaultMadeBy      = 0x0317,       // 03=UNIX, 17=spec v2.3
         kUsesDataDescr      = 0x0008,       // GPBitFlag bit 3
     };

     LocalFileHeader     mLFH;
     CentralDirEntry     mCDE;
 };

 }; // namespace android

 #endif // __LIBS_ZIPENTRY_H
	/*
	* Copyright (C) 2006 The Android Open Source Project
	*
	* 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.
	*/

	//
	// Zip archive entries.
	//
	// The ZipEntry class is tightly meshed with the ZipFile class.
	//
	#ifndef __LIBS_ZIPENTRY_H
	#define __LIBS_ZIPENTRY_H

	#include <utils/Errors.h>

	#include <stdlib.h>
	#include <stdio.h>

	namespace android {

	class ZipFile;

	/*
	* ZipEntry objects represent a single entry in a Zip archive.
	*
	* You can use one of these to get or set information about an entry, but
	* there are no functions here for accessing the data itself. (We could
	* tuck a pointer to the ZipFile in here for convenience, but that raises
	* the likelihood of using ZipEntry objects after discarding the ZipFile.)
	*
	* File information is stored in two places: next to the file data (the Local
	* File Header, and possibly a Data Descriptor), and at the end of the file
	* (the Central Directory Entry). The two must be kept in sync.
	*/
	class ZipEntry {
	public:
	friend class ZipFile;

	ZipEntry(void)
	: mDeleted(false), mMarked(false)
	{}
	~ZipEntry(void) {}

	/*
	* Returns "true" if the data is compressed.
	*/
	bool isCompressed(void) const {
	return mCDE.mCompressionMethod != kCompressStored;
	}
	int getCompressionMethod(void) const { return mCDE.mCompressionMethod; }

	/*
	* Return the uncompressed length.
	*/
	off_t getUncompressedLen(void) const { return mCDE.mUncompressedSize; }

	/*
	* Return the compressed length. For uncompressed data, this returns
	* the same thing as getUncompresesdLen().
	*/
	off_t getCompressedLen(void) const { return mCDE.mCompressedSize; }

	/*
	* Return the absolute file offset of the start of the compressed or
	* uncompressed data.
	*/
	off_t getFileOffset(void) const {
	return mCDE.mLocalHeaderRelOffset +
	LocalFileHeader::kLFHLen +
	mLFH.mFileNameLength +
	mLFH.mExtraFieldLength;
	}

	/*
	* Return the data CRC.
	*/
	unsigned long getCRC32(void) const { return mCDE.mCRC32; }

	/*
	* Return file modification time in UNIX seconds-since-epoch.
	*/
	time_t getModWhen(void) const;

	/*
	* Return the archived file name.
	*/
	const char* getFileName(void) const { return (const char*) mCDE.mFileName; }

	/*
	* Application-defined "mark". Can be useful when synchronizing the
	* contents of an archive with contents on disk.
	*/
	bool getMarked(void) const { return mMarked; }
	void setMarked(bool val) { mMarked = val; }

	/*
	* Some basic functions for raw data manipulation. "LE" means
	* Little Endian.
	*/
	static inline unsigned short getShortLE(const unsigned char* buf) {
	return buf[0] \| (buf[1] << 8);
	}
	static inline unsigned long getLongLE(const unsigned char* buf) {
	return buf[0] \| (buf[1] << 8) \| (buf[2] << 16) \| (buf[3] << 24);
	}
	static inline void putShortLE(unsigned char* buf, short val) {
	buf[0] = (unsigned char) val;
	buf[1] = (unsigned char) (val >> 8);
	}
	static inline void putLongLE(unsigned char* buf, long val) {
	buf[0] = (unsigned char) val;
	buf[1] = (unsigned char) (val >> 8);
	buf[2] = (unsigned char) (val >> 16);
	buf[3] = (unsigned char) (val >> 24);
	}

	/* defined for Zip archives */
	enum {
	kCompressStored = 0, // no compression
	// shrunk = 1,
	// reduced 1 = 2,
	// reduced 2 = 3,
	// reduced 3 = 4,
	// reduced 4 = 5,
	// imploded = 6,
	// tokenized = 7,
	kCompressDeflated = 8, // standard deflate
	// Deflate64 = 9,
	// lib imploded = 10,
	// reserved = 11,
	// bzip2 = 12,
	};

	/*
	* Deletion flag. If set, the entry will be removed on the next
	* call to "flush".
	*/
	bool getDeleted(void) const { return mDeleted; }

	protected:
	/*
	* Initialize the structure from the file, which is pointing at
	* our Central Directory entry.
	*/
	status_t initFromCDE(FILE* fp);

	/*
	* Initialize the structure for a new file. We need the filename
	* and comment so that we can properly size the LFH area. The
	* filename is mandatory, the comment is optional.
	*/
	void initNew(const char* fileName, const char* comment);

	/*
	* Initialize the structure with the contents of a ZipEntry from
	* another file.
	*/
	status_t initFromExternal(const ZipFile* pZipFile, const ZipEntry* pEntry);

	/*
	* Add some pad bytes to the LFH. We do this by adding or resizing
	* the "extra" field.
	*/
	status_t addPadding(int padding);

	/*
	* Set information about the data for this entry.
	*/
	void setDataInfo(long uncompLen, long compLen, unsigned long crc32,
	int compressionMethod);

	/*
	* Set the modification date.
	*/
	void setModWhen(time_t when);

	/*
	* Return the offset of the local file header.
	*/
	off_t getLFHOffset(void) const { return mCDE.mLocalHeaderRelOffset; }

	/*
	* Set the offset of the local file header, relative to the start of
	* the current file.
	*/
	void setLFHOffset(off_t offset) {
	mCDE.mLocalHeaderRelOffset = (long) offset;
	}

	/* mark for deletion; used by ZipFile::remove() */
	void setDeleted(void) { mDeleted = true; }

	private:
	/* these are private and not defined */
	ZipEntry(const ZipEntry& src);
	ZipEntry& operator=(const ZipEntry& src);

	/* returns "true" if the CDE and the LFH agree */
	bool compareHeaders(void) const;
	void copyCDEtoLFH(void);

	bool mDeleted; // set if entry is pending deletion
	bool mMarked; // app-defined marker

	/*
	* Every entry in the Zip archive starts off with one of these.
	*/
	class LocalFileHeader {
	public:
	LocalFileHeader(void) :
	mVersionToExtract(0),
	mGPBitFlag(0),
	mCompressionMethod(0),
	mLastModFileTime(0),
	mLastModFileDate(0),
	mCRC32(0),
	mCompressedSize(0),
	mUncompressedSize(0),
	mFileNameLength(0),
	mExtraFieldLength(0),
	mFileName(NULL),
	mExtraField(NULL)
	{}
	virtual ~LocalFileHeader(void) {
	delete[] mFileName;
	delete[] mExtraField;
	}

	status_t read(FILE* fp);
	status_t write(FILE* fp);

	// unsigned long mSignature;
	unsigned short mVersionToExtract;
	unsigned short mGPBitFlag;
	unsigned short mCompressionMethod;
	unsigned short mLastModFileTime;
	unsigned short mLastModFileDate;
	unsigned long mCRC32;
	unsigned long mCompressedSize;
	unsigned long mUncompressedSize;
	unsigned short mFileNameLength;
	unsigned short mExtraFieldLength;
	unsigned char* mFileName;
	unsigned char* mExtraField;

	enum {
	kSignature = 0x04034b50,
	kLFHLen = 30, // LocalFileHdr len, excl. var fields
	};

	void dump(void) const;
	};

	/*
	* Every entry in the Zip archive has one of these in the "central
	* directory" at the end of the file.
	*/
	class CentralDirEntry {
	public:
	CentralDirEntry(void) :
	mVersionMadeBy(0),
	mVersionToExtract(0),
	mGPBitFlag(0),
	mCompressionMethod(0),
	mLastModFileTime(0),
	mLastModFileDate(0),
	mCRC32(0),
	mCompressedSize(0),
	mUncompressedSize(0),
	mFileNameLength(0),
	mExtraFieldLength(0),
	mFileCommentLength(0),
	mDiskNumberStart(0),
	mInternalAttrs(0),
	mExternalAttrs(0),
	mLocalHeaderRelOffset(0),
	mFileName(NULL),
	mExtraField(NULL),
	mFileComment(NULL)
	{}
	virtual ~CentralDirEntry(void) {
	delete[] mFileName;
	delete[] mExtraField;
	delete[] mFileComment;
	}

	status_t read(FILE* fp);
	status_t write(FILE* fp);

	// unsigned long mSignature;
	unsigned short mVersionMadeBy;
	unsigned short mVersionToExtract;
	unsigned short mGPBitFlag;
	unsigned short mCompressionMethod;
	unsigned short mLastModFileTime;
	unsigned short mLastModFileDate;
	unsigned long mCRC32;
	unsigned long mCompressedSize;
	unsigned long mUncompressedSize;
	unsigned short mFileNameLength;
	unsigned short mExtraFieldLength;
	unsigned short mFileCommentLength;
	unsigned short mDiskNumberStart;
	unsigned short mInternalAttrs;
	unsigned long mExternalAttrs;
	unsigned long mLocalHeaderRelOffset;
	unsigned char* mFileName;
	unsigned char* mExtraField;
	unsigned char* mFileComment;

	void dump(void) const;

	enum {
	kSignature = 0x02014b50,
	kCDELen = 46, // CentralDirEnt len, excl. var fields
	};
	};

	enum {
	//kDataDescriptorSignature = 0x08074b50, // currently unused
	kDataDescriptorLen = 16, // four 32-bit fields

	kDefaultVersion = 20, // need deflate, nothing much else
	kDefaultMadeBy = 0x0317, // 03=UNIX, 17=spec v2.3
	kUsesDataDescr = 0x0008, // GPBitFlag bit 3
	};

	LocalFileHeader mLFH;
	CentralDirEntry mCDE;
	};

	}; // namespace android

	#endif // __LIBS_ZIPENTRY_H