1 /**************************************************************
2 *
3 * Licensed to the Apache Software Foundation (ASF) under one
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8 * "License"); you may not use this file except in compliance
9 * with the License. You may obtain a copy of the License at
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11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing,
14 * software distributed under the License is distributed on an
15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16 * KIND, either express or implied. See the License for the
17 * specific language governing permissions and limitations
18 * under the License.
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21
22
23
24 // MARKER(update_precomp.py): autogen include statement, do not remove
25 #include "precompiled_shell.hxx"
26 #include "zipexcptn.hxx"
27 #include "internal/zipfile.hxx"
28 #include "internal/global.hxx"
29
30 #include <malloc.h>
31 #include <algorithm>
32 #include <functional>
33
34 #include <string.h>
35
36 #ifdef OS2
37 #include <alloca.h>
38 #define _alloca alloca
39 #define ERROR_NOT_ENOUGH_MEMORY 8
40 #endif
41
42 namespace internal
43 {
44 /* for case in-sensitive string comparison */
45 struct stricmp : public std::unary_function<std::string, bool>
46 {
stricmpinternal::stricmp47 stricmp(const std::string& str) : str_(str)
48 {}
49
operator ()internal::stricmp50 bool operator() (const std::string& other)
51 { return (0 == _stricmp(str_.c_str(), other.c_str())); }
52
53 std::string str_;
54 };
55 } // namespace internal
56
57 /** Checks whether a file is a zip file or not
58
59 @precond The given parameter must be a string with length > 0
60 The file must exist
61 The file must be readable for the current user
62
63 @returns true if the file is a zip file
64 false if the file is not a zip file
65
66 @throws ParameterException if the given file name is empty
67 IOException if the specified file doesn't exist
68 AccessViolationException if read access to the file is denied
69 */
IsZipFile(const std::string &)70 bool ZipFile::IsZipFile(const std::string& /*FileName*/)
71 {
72 return true;
73 }
74
IsZipFile(void *)75 bool ZipFile::IsZipFile(void* /*stream*/)
76 {
77 return true;
78 }
79
80
81 /** Returns wheter the version of the specified zip file may be uncompressed with the
82 currently used zlib version or not
83
84 @precond The given parameter must be a string with length > 0
85 The file must exist
86 The file must be readable for the current user
87 The file must be a valid zip file
88
89 @returns true if the file may be uncompressed with the currently used zlib
90 false if the file may not be uncompressed with the currently used zlib
91
92 @throws ParameterException if the given file name is empty
93 IOException if the specified file doesn't exist or is no zip file
94 AccessViolationException if read access to the file is denied
95 */
IsValidZipFileVersionNumber(const std::string &)96 bool ZipFile::IsValidZipFileVersionNumber(const std::string& /*FileName*/)
97 {
98 return true;
99 }
100
IsValidZipFileVersionNumber(void *)101 bool ZipFile::IsValidZipFileVersionNumber(void* /* stream*/)
102 {
103 return true;
104 }
105
106
107 /** Constructs a zip file from a zip file
108
109 @precond The given parameter must be a string with length > 0
110 The file must exist
111 The file must be readable for the current user
112
113 @throws ParameterException if the given file name is empty
114 IOException if the specified file doesn't exist or is no valid zip file
115 AccessViolationException if read access to the file is denied
116 WrongZipVersionException if the zip file cannot be uncompressed
117 with the used zlib version
118 */
ZipFile(const std::string & FileName)119 ZipFile::ZipFile(const std::string& FileName)
120 {
121 m_uzFile = unzOpen(FileName.c_str());
122
123 if (0 == m_uzFile)
124 throw IOException(-1);
125 }
126
ZipFile(void * stream,zlib_filefunc_def * fa)127 ZipFile::ZipFile(void* stream, zlib_filefunc_def* fa)
128 {
129 fa->opaque = stream;
130 m_uzFile = unzOpen2((const char *)NULL, fa);
131
132 if (0 == m_uzFile)
133 throw IOException(-1);
134 }
135
136
137 /** Destroys a zip file
138 */
~ZipFile()139 ZipFile::~ZipFile()
140 {
141 unzClose(m_uzFile);
142 }
143
144 /** Provides an interface to read the uncompressed data of a content of the zip file
145
146 @precond The specified content must exist in this file
147 ppstm must not be NULL
148 */
GetUncompressedContent(const std::string & ContentName,ZipContentBuffer_t & ContentBuffer)149 void ZipFile::GetUncompressedContent(
150 const std::string& ContentName, /*inout*/ ZipContentBuffer_t& ContentBuffer)
151 {
152 int rc = unzLocateFile(m_uzFile, ContentName.c_str(), 0);
153
154 if (UNZ_END_OF_LIST_OF_FILE == rc)
155 throw ZipContentMissException(rc);
156
157 unz_file_info finfo;
158 unzGetCurrentFileInfo(m_uzFile, &finfo, 0, 0, 0, 0, 0, 0);
159
160 ContentBuffer.resize(finfo.uncompressed_size);
161
162 rc = unzOpenCurrentFile(m_uzFile);
163
164 if (UNZ_OK != rc)
165 throw ZipException(rc);
166
167 rc = unzReadCurrentFile(m_uzFile, &ContentBuffer[0], finfo.uncompressed_size);
168
169 if (rc < 0)
170 throw ZipException(rc);
171
172 rc = unzCloseCurrentFile(m_uzFile);
173
174 if (rc < 0)
175 throw ZipException(rc);
176 }
177
178 /** Returns a list with the content names contained within this file
179
180 */
GetDirectory() const181 ZipFile::DirectoryPtr_t ZipFile::GetDirectory() const
182 {
183 DirectoryPtr_t dir(new Directory_t());
184
185 long lmax = GetFileLongestFileNameLength() + 1;
186 char* szFileName = reinterpret_cast<char*>(_alloca(lmax));
187
188 if (!szFileName)
189 throw ZipException(ERROR_NOT_ENOUGH_MEMORY);
190
191 int rc = unzGoToFirstFile(m_uzFile);
192
193 while (UNZ_OK == rc && UNZ_END_OF_LIST_OF_FILE != rc)
194 {
195 unz_file_info finfo;
196 unzGetCurrentFileInfo(
197 m_uzFile, &finfo, szFileName, lmax, 0, 0, 0, 0);
198
199 dir->push_back(szFileName);
200
201 rc = unzGoToNextFile(m_uzFile);
202 }
203
204 if (UNZ_OK != rc && UNZ_END_OF_LIST_OF_FILE != rc)
205 throw ZipException(rc);
206
207 return dir;
208 }
209
210 /** Convinience query function may even realized with
211 iterating over a ZipFileDirectory returned by
212 GetDirectory */
HasContent(const std::string & ContentName) const213 bool ZipFile::HasContent(const std::string& ContentName) const
214 {
215 //#i34314# we need to compare package content names
216 //case in-sensitive as it is not defined that such
217 //names must be handled case sensitive
218 DirectoryPtr_t dir = GetDirectory();
219 Directory_t::iterator iter =
220 std::find_if(dir->begin(), dir->end(), internal::stricmp(ContentName));
221
222 return (iter != dir->end());
223 }
224
225
226 /** Returns the length of the longest file name
227 in the current zip file
228 */
GetFileLongestFileNameLength() const229 long ZipFile::GetFileLongestFileNameLength() const
230 {
231 long lmax = 0;
232 unz_file_info finfo;
233
234 int rc = unzGoToFirstFile(m_uzFile);
235
236 while (UNZ_OK == rc && UNZ_END_OF_LIST_OF_FILE != rc)
237 {
238 unzGetCurrentFileInfo(m_uzFile, &finfo, 0, 0, 0, 0, 0, 0);
239 lmax = std::max<long>(lmax, finfo.size_filename);
240 rc = unzGoToNextFile(m_uzFile);
241 }
242
243 if (UNZ_OK != rc && UNZ_END_OF_LIST_OF_FILE != rc)
244 throw ZipException(rc);
245
246 return lmax;
247 }
248
249