Skip to main content
aboutsummaryrefslogtreecommitdiffstats
blob: f8d2606a635ee08626f998273279b722f0083322 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
/*******************************************************************************
 * Copyright (c) 2000, 2008 QNX Software Systems and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     QNX Software Systems - Initial API and implementation
 *******************************************************************************/
package org.eclipse.cdt.utils.coff;


import java.io.File;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.util.Vector;

import org.eclipse.cdt.core.CCorePlugin;

/**
 *  The <code>AR</code> class is used for parsing standard ELF archive (ar) files.
 *
 *  Each object within the archive is represented by an ARHeader class.  Each of
 *  of these objects can then be turned into an PE object for performing PE
 *  class operations.
 *  @deprecated - use org.eclipse.cdt.ui.utils.AR
 *  @see ARHeader
 */
@Deprecated
public class PEArchive {

	protected String filename;
	protected RandomAccessFile rfile;
	protected long strtbl_pos = -1;
	private ARHeader[] headers;

	public void dispose() {
		try {
			if (rfile != null) {
				rfile.close();
				rfile = null;
			}
		} catch (IOException e) {
		}
	}

	/**
	 * Do not leak fds.
	 */
	@Override
	protected void finalize() throws Throwable {
		try {
			dispose();
		} finally {
			super.finalize();
		}
	}

	/**
	 * The <code>ARHeader</code> class is used to store the per-object file 
	 *  archive headers.  It can also create an PE object for inspecting
	 *  the object file data.
	 */
	public class ARHeader {

		private String object_name;
//		private String modification_time;
//		private String uid;
//		private String gid;
//		private String mode;
		private long size;
		private long elf_offset;

		/**
		 * Remove the padding from the archive header strings.
		 */
		private String removeBlanks(String str) {
			while (str.charAt(str.length() - 1) == ' ')
				str = str.substring(0, str.length() - 1);
			return str;
		}

		/**
		 * Look up the name stored in the archive's string table based
		 * on the offset given. 
		 *
		 * Maintains <code>rfile</code> file location.
		 *
		 * @param offset 
		 *    Offset into the string table for first character of the name.
		 * @throws IOException 
		 *    <code>offset</code> not in string table bounds.
		 */
		private String nameFromStringTable(long offset) throws IOException {
			StringBuffer name = new StringBuffer(0);
			long pos = rfile.getFilePointer();

			try {
				if (strtbl_pos != -1) {
					byte temp;
					rfile.seek(strtbl_pos + offset);
					while ((temp = rfile.readByte()) != '\n')
						name.append((char) temp);
				}
			} finally {
				rfile.seek(pos);
			}

			return name.toString();
		}

		/**
		 * Creates a new archive header object.  
		 *
		 * Assumes that rfile is already at the correct location in the file.
		 *
		 * @throws IOException 
		 *    There was an error processing the header data from the file.
		 */
		public ARHeader() throws IOException {
			byte[] object_name = new byte[16];
			byte[] modification_time = new byte[12];
			byte[] uid = new byte[6];
			byte[] gid = new byte[6];
			byte[] mode = new byte[8];
			byte[] size = new byte[10];
			byte[] trailer = new byte[2];

			//
			// Read in the archive header data. Fixed sizes.
			//
			rfile.read(object_name);
			rfile.read(modification_time);
			rfile.read(uid);
			rfile.read(gid);
			rfile.read(mode);
			rfile.read(size);
			rfile.read(trailer);

			//
			// Save this location so we can create the PE object later.
			//
			elf_offset = rfile.getFilePointer();

			//
			// Convert the raw bytes into strings and numbers.
			//
			this.object_name = removeBlanks(new String(object_name));
//			this.modification_time = new String(modification_time);
//			this.uid = new String(uid);
//			this.gid = new String(gid);
//			this.mode = new String(mode);
			this.size = Long.parseLong(removeBlanks(new String(size)));

			//
			// If the name is of the format "/<number>", get name from the
			// string table.
			//
			if (strtbl_pos != -1
				&& this.object_name.length() > 1
				&& this.object_name.charAt(0) == '/') {
				try {
					long offset = Long.parseLong(this.object_name.substring(1));
					this.object_name = nameFromStringTable(offset);
				} catch (java.lang.Exception e) {
				}
			}

			//
			// Strip the trailing / from the object name.
			//
			int len = this.object_name.length();
			if (len > 2 && this.object_name.charAt(len - 1) == '/') {
				this.object_name = this.object_name.substring(0, len - 1);
			}

		}

		/** Get the name of the object file */
		public String getObjectName() {
			return object_name;
		}

		/** Get the size of the object file . */
		public long getSize() {
			return size;
		}

		/**
		 *  Create an new PE object for the object file.
		 *
		 * @throws IOException 
		 *    Not a valid PE object file.
		 * @return A new PE object.  
		 * @see PE#PE( String, long )
		 */
		public PE getPE() throws IOException {
			return new PE(filename, elf_offset);
		}

		public PE getPE(boolean filter_on) throws IOException {
			return new PE(filename, elf_offset, filter_on);
		}

		public byte[] getObjectData() throws IOException {
			byte[] temp = new byte[(int) size];
			rfile.seek(elf_offset);
			rfile.read(temp);
			return temp;
		}
	}

	public static boolean isARHeader(byte[] ident) {
		if (ident == null || ident.length < 7
			|| ident[0] != '!'
			|| ident[1] != '<'
			|| ident[2] != 'a'
			|| ident[3] != 'r'
			|| ident[4] != 'c'
			|| ident[5] != 'h'
			|| ident[6] != '>')
			return false;
		return true;
	}

	/**
	 *  Creates a new <code>AR</code> object from the contents of 
	 *  the given file.
	 *
	 *  @param filename The file to process.
	 *  @throws IOException The file is not a valid archive.
	 */
	public PEArchive(String filename) throws IOException {
		this.filename = filename;
		rfile = new RandomAccessFile(filename, "r"); //$NON-NLS-1$
		String hdr = rfile.readLine();
		if (hdr == null || hdr.compareTo("!<arch>") != 0) { //$NON-NLS-1$
			rfile.close();
			throw new IOException(CCorePlugin.getResourceString("Util.exception.invalidArchive")); //$NON-NLS-1$
		}
	}

	/** Load the headers from the file (if required).  */
	private void loadHeaders() throws IOException {
		if (headers != null)
			return;

		Vector<ARHeader> v = new Vector<ARHeader>();
		try {
			//
			// Check for EOF condition
			//
			while (rfile.getFilePointer() < rfile.length()) {
				ARHeader header = new ARHeader();
				String name = header.getObjectName();

				long pos = rfile.getFilePointer();

				//
				// If the name starts with a / it is specical.
				//
				if (name.charAt(0) != '/')
					v.add(header);

				//
				// If the name is "//" then this is the string table section.
				//
				if (name.compareTo("//") == 0) //$NON-NLS-1$
					strtbl_pos = pos;

				//
				// Compute the location of the next header in the archive.
				//
				pos += header.getSize();
				if ((pos % 2) != 0)
					pos++;

				rfile.seek(pos);
			}
		} catch (IOException e) {
		}
		headers = v.toArray(new ARHeader[0]);
	}

	/**
	 *  Get an array of all the object file headers for this archive.
	 * 
	 * @throws IOException 
	 *    Unable to process the archive file.
	 * @return An array of headers, one for each object within the archive.
	 * @see ARHeader
	 */
	public ARHeader[] getHeaders() throws IOException {
		loadHeaders();
		return headers;
	}

	private boolean stringInStrings(String str, String[] set) {
		for (String element : set)
			if (str.compareTo(element) == 0)
				return true;
		return false;
	}

	public String[] extractFiles(String outdir, String[] names)
		throws IOException {
		Vector<String> names_used = new Vector<String>();
		String object_name;
		int count;

		loadHeaders();

		count = 0;
		for (ARHeader header : headers) {
			object_name = header.getObjectName();
			if (names != null && !stringInStrings(object_name, names))
				continue;

			object_name = "" + count + "_" + object_name; //$NON-NLS-1$ //$NON-NLS-2$
			count++;

			byte[] data = header.getObjectData();
			File output = new File(outdir, object_name);
			names_used.add(object_name);

			RandomAccessFile rfile = new RandomAccessFile(output, "rw"); //$NON-NLS-1$
			rfile.write(data);
			rfile.close();
		}

		return names_used.toArray(new String[0]);
	}

	public String[] extractFiles(String outdir) throws IOException {
		return extractFiles(outdir, null);
	}

}

Back to the top