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-rw-r--r--shell/source/win32/zipfile/zipexcptn.cxx104
-rw-r--r--shell/source/win32/zipfile/zipexcptn.hxx85
-rw-r--r--shell/source/win32/zipfile/zipfile.cxx574
3 files changed, 763 insertions, 0 deletions
diff --git a/shell/source/win32/zipfile/zipexcptn.cxx b/shell/source/win32/zipfile/zipexcptn.cxx
new file mode 100644
index 000000000..623d511fb
--- /dev/null
+++ b/shell/source/win32/zipfile/zipexcptn.cxx
@@ -0,0 +1,104 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed
+ * with this work for additional information regarding copyright
+ * ownership. The ASF licenses this file to you 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 .
+ */
+
+#include <global.hxx>
+#include "zipexcptn.hxx"
+
+
+RuntimeException::RuntimeException(int Error) :
+ m_Error(Error)
+{
+}
+
+
+RuntimeException::~RuntimeException() throw()
+{
+}
+
+
+int RuntimeException::GetErrorCode() const
+{
+ return m_Error;
+}
+
+
+ZipException::ZipException(int Error) :
+ RuntimeException(Error)
+{
+}
+
+
+const char* ZipException::what() const throw()
+{
+ return nullptr;
+}
+
+
+Win32Exception::Win32Exception(int Error) :
+ RuntimeException(Error),
+ m_MsgBuff(nullptr)
+{
+}
+
+
+Win32Exception::~Win32Exception() throw()
+{
+ if (m_MsgBuff)
+ LocalFree(m_MsgBuff);
+}
+
+
+const char* Win32Exception::what() const throw()
+{
+ if (m_MsgBuff == nullptr)
+ {
+ FormatMessageA(
+ FORMAT_MESSAGE_ALLOCATE_BUFFER |
+ FORMAT_MESSAGE_FROM_SYSTEM |
+ FORMAT_MESSAGE_IGNORE_INSERTS,
+ nullptr,
+ GetErrorCode(),
+ MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
+ reinterpret_cast<LPSTR>(&m_MsgBuff),
+ 0,
+ nullptr);
+ }
+
+ return m_MsgBuff;
+}
+
+
+ZipContentMissException::ZipContentMissException(int Error) :
+ ZipException(Error)
+{
+}
+
+
+AccessViolationException::AccessViolationException(int Error) :
+ Win32Exception(Error)
+{
+}
+
+
+IOException::IOException(int Error) :
+ Win32Exception(Error)
+{
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/shell/source/win32/zipfile/zipexcptn.hxx b/shell/source/win32/zipfile/zipexcptn.hxx
new file mode 100644
index 000000000..6fb7c0d97
--- /dev/null
+++ b/shell/source/win32/zipfile/zipexcptn.hxx
@@ -0,0 +1,85 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed
+ * with this work for additional information regarding copyright
+ * ownership. The ASF licenses this file to you 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 .
+ */
+
+// ZipException.h: interface for the ZipException class.
+
+#ifndef INCLUDED_SHELL_SOURCE_WIN32_ZIPFILE_ZIPEXCPTN_HXX
+#define INCLUDED_SHELL_SOURCE_WIN32_ZIPFILE_ZIPEXCPTN_HXX
+
+#include <stdexcept>
+
+
+class RuntimeException : public std::exception
+{
+public:
+ explicit RuntimeException(int Error);
+ virtual ~RuntimeException() throw() override;
+
+ int GetErrorCode() const;
+
+private:
+ int m_Error;
+};
+
+
+class ZipException : public RuntimeException
+{
+public:
+ explicit ZipException(int Error);
+
+ virtual const char* what() const throw() override;
+};
+
+
+class Win32Exception : public RuntimeException
+{
+public:
+ explicit Win32Exception(int Error);
+ virtual ~Win32Exception() throw() override;
+
+ virtual const char* what() const throw() override;
+
+private:
+ mutable char* m_MsgBuff;
+};
+
+
+class ZipContentMissException : public ZipException
+{
+public:
+ explicit ZipContentMissException(int Error);
+};
+
+
+class AccessViolationException : public Win32Exception
+{
+public:
+ explicit AccessViolationException(int Error);
+};
+
+
+class IOException : public Win32Exception
+{
+public:
+ explicit IOException(int Error);
+};
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/shell/source/win32/zipfile/zipfile.cxx b/shell/source/win32/zipfile/zipfile.cxx
new file mode 100644
index 000000000..a1b2b40e6
--- /dev/null
+++ b/shell/source/win32/zipfile/zipfile.cxx
@@ -0,0 +1,574 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed
+ * with this work for additional information regarding copyright
+ * ownership. The ASF licenses this file to you 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 .
+ */
+
+#include "zipexcptn.hxx"
+#include <zipfile.hxx>
+#include <global.hxx>
+#include <types.hxx>
+#include <stream_helper.hxx>
+
+#include <malloc.h>
+#include <algorithm>
+#include <memory>
+
+#include <string.h>
+
+#include <o3tl/safeint.hxx>
+
+namespace
+{
+
+struct LocalFileHeader
+{
+ unsigned short min_version;
+ unsigned short general_flag;
+ unsigned short compression;
+ unsigned short lastmod_time;
+ unsigned short lastmod_date;
+ unsigned crc32;
+ unsigned compressed_size;
+ unsigned uncompressed_size;
+ unsigned short filename_size;
+ unsigned short extra_field_size;
+ std::string filename;
+ std::string extra_field;
+ LocalFileHeader()
+ : min_version(0), general_flag(0), compression(0), lastmod_time(0), lastmod_date(0),
+ crc32(0), compressed_size(0), uncompressed_size(0), filename_size(0), extra_field_size(0),
+ filename(), extra_field() {}
+};
+
+struct CentralDirectoryEntry
+{
+ unsigned short creator_version;
+ unsigned short min_version;
+ unsigned short general_flag;
+ unsigned short compression;
+ unsigned short lastmod_time;
+ unsigned short lastmod_date;
+ unsigned crc32;
+ unsigned compressed_size;
+ unsigned uncompressed_size;
+ unsigned short filename_size;
+ unsigned short extra_field_size;
+ unsigned short file_comment_size;
+ unsigned short disk_num;
+ unsigned short internal_attr;
+ unsigned external_attr;
+ unsigned offset;
+ std::string filename;
+ std::string extra_field;
+ std::string file_comment;
+ CentralDirectoryEntry()
+ : creator_version(0), min_version(0), general_flag(0), compression(0), lastmod_time(0),
+ lastmod_date(0), crc32(0), compressed_size(0), uncompressed_size(0), filename_size(0),
+ extra_field_size(0), file_comment_size(0), disk_num(0), internal_attr(0),
+ external_attr(0), offset(0), filename(), extra_field(), file_comment() {}
+};
+
+struct CentralDirectoryEnd
+{
+ unsigned short disk_num;
+ unsigned short cdir_disk;
+ unsigned short disk_entries;
+ unsigned short cdir_entries;
+ unsigned cdir_size;
+ unsigned cdir_offset;
+ unsigned short comment_size;
+ std::string comment;
+ CentralDirectoryEnd()
+ : disk_num(0), cdir_disk(0), disk_entries(0), cdir_entries(0),
+ cdir_size(0), cdir_offset(0), comment_size(0), comment() {}
+};
+
+#define CDIR_ENTRY_SIG 0x02014b50
+#define LOC_FILE_HEADER_SIG 0x04034b50
+#define CDIR_END_SIG 0x06054b50
+
+// This little lot performs in a truly appalling way without
+// buffering eg. on an IStream.
+
+unsigned short readShort(StreamInterface *stream)
+{
+ if (!stream || stream->stell() == -1)
+ throw IOException(-1);
+ unsigned short tmpBuf;
+ unsigned long numBytesRead = stream->sread(
+ reinterpret_cast<unsigned char *>( &tmpBuf ), 2);
+ if (numBytesRead != 2)
+ throw IOException(-1);
+ return tmpBuf;
+}
+
+unsigned readInt(StreamInterface *stream)
+{
+ if (!stream || stream->stell() == -1)
+ throw IOException(-1);
+ unsigned tmpBuf;
+ unsigned long numBytesRead = stream->sread(
+ reinterpret_cast<unsigned char *>( &tmpBuf ), 4);
+ if (numBytesRead != 4)
+ throw IOException(-1);
+ return tmpBuf;
+}
+
+std::string readString(StreamInterface *stream, unsigned long size)
+{
+ if (!stream || stream->stell() == -1)
+ throw IOException(-1);
+ auto tmp = std::make_unique<unsigned char[]>(size);
+ unsigned long numBytesRead = stream->sread(tmp.get(), size);
+ if (numBytesRead != size)
+ {
+ throw IOException(-1);
+ }
+
+ std::string aStr(reinterpret_cast<char *>(tmp.get()), size);
+ return aStr;
+}
+
+bool readCentralDirectoryEnd(StreamInterface *stream, CentralDirectoryEnd &end)
+{
+ try
+ {
+ unsigned signature = readInt(stream);
+ if (signature != CDIR_END_SIG)
+ return false;
+
+ end.disk_num = readShort(stream);
+ end.cdir_disk = readShort(stream);
+ end.disk_entries = readShort(stream);
+ end.cdir_entries = readShort(stream);
+ end.cdir_size = readInt(stream);
+ end.cdir_offset = readInt(stream);
+ end.comment_size = readShort(stream);
+ end.comment.assign(readString(stream, end.comment_size));
+ }
+ catch (...)
+ {
+ return false;
+ }
+ return true;
+}
+
+bool readCentralDirectoryEntry(StreamInterface *stream, CentralDirectoryEntry &entry)
+{
+ try
+ {
+ unsigned signature = readInt(stream);
+ if (signature != CDIR_ENTRY_SIG)
+ return false;
+
+ entry.creator_version = readShort(stream);
+ entry.min_version = readShort(stream);
+ entry.general_flag = readShort(stream);
+ entry.compression = readShort(stream);
+ entry.lastmod_time = readShort(stream);
+ entry.lastmod_date = readShort(stream);
+ entry.crc32 = readInt(stream);
+ entry.compressed_size = readInt(stream);
+ entry.uncompressed_size = readInt(stream);
+ entry.filename_size = readShort(stream);
+ entry.extra_field_size = readShort(stream);
+ entry.file_comment_size = readShort(stream);
+ entry.disk_num = readShort(stream);
+ entry.internal_attr = readShort(stream);
+ entry.external_attr = readInt(stream);
+ entry.offset = readInt(stream);
+ entry.filename.assign(readString(stream, entry.filename_size));
+ entry.extra_field.assign(readString(stream, entry.extra_field_size));
+ entry.file_comment.assign(readString(stream, entry.file_comment_size));
+ }
+ catch (...)
+ {
+ return false;
+ }
+ return true;
+}
+
+bool readLocalFileHeader(StreamInterface *stream, LocalFileHeader &header)
+{
+ try
+ {
+ unsigned signature = readInt(stream);
+ if (signature != LOC_FILE_HEADER_SIG)
+ return false;
+
+ header.min_version = readShort(stream);
+ header.general_flag = readShort(stream);
+ header.compression = readShort(stream);
+ header.lastmod_time = readShort(stream);
+ header.lastmod_date = readShort(stream);
+ header.crc32 = readInt(stream);
+ header.compressed_size = readInt(stream);
+ header.uncompressed_size = readInt(stream);
+ header.filename_size = readShort(stream);
+ header.extra_field_size = readShort(stream);
+ header.filename.assign(readString(stream, header.filename_size));
+ header.extra_field.assign(readString(stream, header.extra_field_size));
+ }
+ catch (...)
+ {
+ return false;
+ }
+ return true;
+}
+
+bool areHeadersConsistent(const LocalFileHeader &header, const CentralDirectoryEntry &entry)
+{
+ if (header.min_version != entry.min_version)
+ return false;
+ if (header.general_flag != entry.general_flag)
+ return false;
+ if (header.compression != entry.compression)
+ return false;
+ if (!(header.general_flag & 0x08))
+ {
+ if (header.crc32 != entry.crc32)
+ return false;
+ if (header.compressed_size != entry.compressed_size)
+ return false;
+ if (header.uncompressed_size != entry.uncompressed_size)
+ return false;
+ }
+ return true;
+}
+
+#define BLOCK_SIZE 0x800
+
+bool findSignatureAtOffset(StreamInterface *stream, unsigned long nOffset)
+{
+ // read in reasonably sized chunk, and read more, to get overlapping sigs
+ unsigned char aBuffer[ BLOCK_SIZE + 4 ];
+
+ stream->sseek(nOffset, SEEK_SET);
+
+ unsigned long nBytesRead = stream->sread(aBuffer, sizeof(aBuffer));
+
+ for (long n = nBytesRead - 4; n >= 0; n--)
+ {
+ if (aBuffer[n ] == 0x50 && aBuffer[n+1] == 0x4b &&
+ aBuffer[n+2] == 0x05 && aBuffer[n+3] == 0x06)
+ { // a palpable hit ...
+ stream->sseek(nOffset + n, SEEK_SET);
+ return true;
+ }
+ }
+
+ return false;
+}
+
+bool findCentralDirectoryEnd(StreamInterface *stream)
+{
+ if (!stream)
+ return false;
+
+ stream->sseek(0,SEEK_END);
+
+ long nLength = stream->stell();
+ if (nLength == -1)
+ return false;
+
+ try
+ {
+ for (long nOffset = nLength - BLOCK_SIZE - 4;
+ nOffset > 0; nOffset -= BLOCK_SIZE)
+ {
+ if (findSignatureAtOffset(stream, nOffset))
+ return true;
+ }
+ return findSignatureAtOffset(stream, 0);
+ }
+ catch (...)
+ {
+ return false;
+ }
+}
+
+bool isZipStream(StreamInterface *stream)
+{
+ if (!findCentralDirectoryEnd(stream))
+ return false;
+ CentralDirectoryEnd end;
+ if (!readCentralDirectoryEnd(stream, end))
+ return false;
+ stream->sseek(end.cdir_offset, SEEK_SET);
+ CentralDirectoryEntry entry;
+ if (!readCentralDirectoryEntry(stream, entry))
+ return false;
+ stream->sseek(entry.offset, SEEK_SET);
+ LocalFileHeader header;
+ if (!readLocalFileHeader(stream, header))
+ return false;
+ if (!areHeadersConsistent(header, entry))
+ return false;
+ return true;
+}
+
+} // anonymous namespace
+
+namespace internal
+{
+
+namespace {
+
+/* for case in-sensitive string comparison */
+struct stricmp
+{
+ explicit stricmp(const std::string &str) : str_(str)
+ {}
+
+ bool operator() (const std::string &other)
+ {
+ return (0 == _stricmp(str_.c_str(), other.c_str()));
+ }
+
+ std::string str_;
+};
+
+}
+
+} // namespace internal
+
+/** Checks whether a file is a zip file or not
+
+ @precond The given parameter must be a string with length > 0
+ The file must exist
+ The file must be readable for the current user
+
+ @returns true if the file is a zip file
+ false if the file is not a zip file
+
+ @throws ParameterException if the given file name is empty
+ IOException if the specified file doesn't exist
+ AccessViolationException if read access to the file is denied
+*/
+bool ZipFile::IsZipFile(const Filepath_t& /*FileName*/)
+{
+ return true;
+}
+
+bool ZipFile::IsZipFile(void* /*stream*/)
+{
+ return true;
+}
+
+
+/** Returns whether the version of the specified zip file may be uncompressed with the
+ currently used zlib version or not
+
+ @precond The given parameter must be a string with length > 0
+ The file must exist
+ The file must be readable for the current user
+ The file must be a valid zip file
+
+ @returns true if the file may be uncompressed with the currently used zlib
+ false if the file may not be uncompressed with the currently used zlib
+
+ @throws ParameterException if the given file name is empty
+ IOException if the specified file doesn't exist or is no zip file
+ AccessViolationException if read access to the file is denied
+*/
+bool ZipFile::IsValidZipFileVersionNumber(const Filepath_t& /*FileName*/)
+{
+ return true;
+}
+
+bool ZipFile::IsValidZipFileVersionNumber(void* /* stream*/)
+{
+ return true;
+}
+
+
+/** Constructs a zip file from a zip file
+
+ @precond The given parameter must be a string with length > 0
+ The file must exist
+ The file must be readable for the current user
+
+ @throws ParameterException if the given file name is empty
+ IOException if the specified file doesn't exist or is no valid zip file
+ AccessViolationException if read access to the file is denied
+ WrongZipVersionException if the zip file cannot be uncompressed
+ with the used zlib version
+*/
+ZipFile::ZipFile(const Filepath_t &FileName) :
+ m_pStream(nullptr),
+ m_bShouldFree(true)
+{
+ m_pStream = new FileStream(FileName.c_str());
+ if (!isZipStream(m_pStream))
+ {
+ delete m_pStream;
+ m_pStream = nullptr;
+ }
+}
+
+ZipFile::ZipFile(StreamInterface *stream) :
+ m_pStream(stream),
+ m_bShouldFree(false)
+{
+ if (!isZipStream(stream))
+ m_pStream = nullptr;
+}
+
+
+/** Destroys a zip file
+*/
+ZipFile::~ZipFile()
+{
+ if (m_pStream && m_bShouldFree)
+ delete m_pStream;
+}
+
+/** Provides an interface to read the uncompressed data of a content of the zip file
+
+ @precond The specified content must exist in this file
+ ppstm must not be NULL
+*/
+void ZipFile::GetUncompressedContent(
+ const std::string &ContentName, /*inout*/ ZipContentBuffer_t &ContentBuffer)
+{
+ if (!findCentralDirectoryEnd(m_pStream))
+ return;
+ CentralDirectoryEnd end;
+ if (!readCentralDirectoryEnd(m_pStream, end))
+ return;
+ m_pStream->sseek(end.cdir_offset, SEEK_SET);
+ CentralDirectoryEntry entry;
+ while (m_pStream->stell() != -1 && o3tl::make_unsigned(m_pStream->stell()) < end.cdir_offset + end.cdir_size)
+ {
+ if (!readCentralDirectoryEntry(m_pStream, entry))
+ return;
+ if (ContentName.length() == entry.filename_size && !_stricmp(entry.filename.c_str(), ContentName.c_str()))
+ break;
+ }
+ if (ContentName.length() != entry.filename_size)
+ return;
+ if (_stricmp(entry.filename.c_str(), ContentName.c_str()))
+ return;
+ m_pStream->sseek(entry.offset, SEEK_SET);
+ LocalFileHeader header;
+ if (!readLocalFileHeader(m_pStream, header))
+ return;
+ if (!areHeadersConsistent(header, entry))
+ return;
+ ContentBuffer.clear();
+ ContentBuffer = ZipContentBuffer_t(entry.uncompressed_size);
+ if (!entry.compression)
+ m_pStream->sread(reinterpret_cast<unsigned char *>(ContentBuffer.data()), entry.uncompressed_size);
+ else
+ {
+ int ret;
+ z_stream strm;
+
+ /* allocate inflate state */
+ strm.zalloc = Z_NULL;
+ strm.zfree = Z_NULL;
+ strm.opaque = Z_NULL;
+ strm.avail_in = 0;
+ strm.next_in = Z_NULL;
+ ret = inflateInit2(&strm,-MAX_WBITS);
+ if (ret != Z_OK)
+ return;
+
+ std::vector<unsigned char> tmpBuffer(entry.compressed_size);
+ if (entry.compressed_size != m_pStream->sread(tmpBuffer.data(), entry.compressed_size))
+ return;
+
+ strm.avail_in = entry.compressed_size;
+ strm.next_in = reinterpret_cast<Bytef *>(tmpBuffer.data());
+
+ strm.avail_out = entry.uncompressed_size;
+ strm.next_out = reinterpret_cast<Bytef *>(ContentBuffer.data());
+ ret = inflate(&strm, Z_FINISH);
+ switch (ret)
+ {
+ case Z_NEED_DICT:
+ case Z_DATA_ERROR:
+ case Z_MEM_ERROR:
+ (void)inflateEnd(&strm);
+ ContentBuffer.clear();
+ return;
+ }
+ (void)inflateEnd(&strm);
+ }
+}
+
+/** Returns a list with the content names contained within this file
+
+*/
+ZipFile::DirectoryPtr_t ZipFile::GetDirectory() const
+{
+ DirectoryPtr_t dir(new Directory_t());
+ if (!findCentralDirectoryEnd(m_pStream))
+ return dir;
+ CentralDirectoryEnd end;
+ if (!readCentralDirectoryEnd(m_pStream, end))
+ return dir;
+ m_pStream->sseek(end.cdir_offset, SEEK_SET);
+ CentralDirectoryEntry entry;
+ while (m_pStream->stell() != -1 && o3tl::make_unsigned(m_pStream->stell()) < end.cdir_offset + end.cdir_size)
+ {
+ if (!readCentralDirectoryEntry(m_pStream, entry))
+ return dir;
+ if (entry.filename_size)
+ dir->push_back(entry.filename);
+ }
+ return dir;
+}
+
+/** Convenience query function may even realized with
+ iterating over a ZipFileDirectory returned by
+ GetDirectory */
+bool ZipFile::HasContent(const std::string &ContentName) const
+{
+ //#i34314# we need to compare package content names
+ //case in-sensitive as it is not defined that such
+ //names must be handled case sensitive
+ DirectoryPtr_t dir = GetDirectory();
+
+ return std::any_of(dir->begin(), dir->end(), internal::stricmp(ContentName));
+}
+
+
+/** Returns the length of the longest file name
+ in the current zip file
+*/
+long ZipFile::GetFileLongestFileNameLength() const
+{
+ long lmax = 0;
+ if (!findCentralDirectoryEnd(m_pStream))
+ return lmax;
+ CentralDirectoryEnd end;
+ if (!readCentralDirectoryEnd(m_pStream, end))
+ return lmax;
+ m_pStream->sseek(end.cdir_offset, SEEK_SET);
+ CentralDirectoryEntry entry;
+ while (m_pStream->stell() != -1 && o3tl::make_unsigned(m_pStream->stell()) < end.cdir_offset + end.cdir_size)
+ {
+ if (!readCentralDirectoryEntry(m_pStream, entry))
+ return lmax;
+ if (entry.filename_size > lmax)
+ lmax = entry.filename_size;
+ }
+ return lmax;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */