116 lines
3.7 KiB
C++
116 lines
3.7 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#ifndef _ZIP_ARCHIVE_H_
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#define _ZIP_ARCHIVE_H_
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#include "Fundamentals.h"
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#include "prio.h"
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/*
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* Central zip directory entry
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*/
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typedef struct {
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char *fn; /* file name */
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Uint32 len; /* file size */
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Uint32 size; /* file compressed size */
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Int32 method; /* Compression method */
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Int32 mod; /* file modification time */
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Int32 off; /* file contents offset */
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} DirectoryEntry;
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/* An object that represents a zip archive */
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class ZipArchive {
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public:
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/* Create a zip archive reader from a zip archive whose
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* canonical pathname is archiveName. Pool is used to allocate
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* memory for data structures. Sets status to true if it was
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* able to successfully open the archive; returns false if
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* it could not.
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*/
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ZipArchive(const char *archiveName, Pool &pool, bool &status);
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~ZipArchive();
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/* Read a file given by fileName from the zip archive into
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* buf, allocating as much memory as necessary. This memory
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* is allocated using the pool passed into the constructor
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* and will go away when the pool is destroyed. On success,
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* returns true and sets len to the length of the file read.
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* Returns false if the file was not found in the archive, or
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* if there was an error.
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*/
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bool get(const char *fileName, char *&buf, Int32 &len) {
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const DirectoryEntry *entry = lookup(fileName);
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if (!entry)
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return false;
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return get(entry, buf, len);
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}
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/* Exactly like get() above, but works with a directory entry
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* obtained via lookup().
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*/
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bool get(const DirectoryEntry *entry, char *&buf, Int32 &len);
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/* returns true if the given file exists in the archive, false
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* otherwise.
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*/
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bool exists(const char *fileName) {
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return (lookup(fileName) != 0);
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}
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/* lookup a file and return it's directory entry if it exists.
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* If not, return false.
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*/
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const DirectoryEntry *lookup(const char *fileName);
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/* Return number of elements in the zip archive whose filenames
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* have the suffix indicated by fileNameSuffix.
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*/
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Uint32 getNumElements(const char *fileNameSuffix);
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/* Gets the names of all elements in the zip archive whose filenames
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* have the suffix indicated by fileNameSuffix. Returns the number
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* of matching elements. Memory for buf is allocated using the
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* pool passed into the constructor and is destroyed when the
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* pool is destroyed.
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*/
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Uint32 listElements(const char *fileNameSuffix, char **&buf);
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private:
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Pool &pool; /* Pool used to allocate internal memory */
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/* File descriptor */
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PRFileDesc *fp;
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DirectoryEntry *dir; /* zip file directory */
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Uint32 nel; /* number of directory entries */
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Uint32 cenoff; /* Offset of central directory (CEN) */
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Uint32 endoff; /* Offset of end-of-central-directory record */
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bool initReader();
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bool findEnd();
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bool readFully(void *buf, Int32 len);
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bool inflateFully(Uint32 size, void *buf, Uint32 len);
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};
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#endif /* _ZIP_ARCHIVE_H_ */
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