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source: branches/CodeEditor/HeuristicLab.ExtLibs/HeuristicLab.Cecil/0.9.5/Mono.Cecil-0.9.5/Mono.Cecil/Mono.Cecil.Metadata/Utilities.cs @ 11700

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Last change on this file since 11700 was 11700, checked in by jkarder, 10 years ago
#2077: created branch and added first version
File size: 13.4 KB

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1	//
2	// Utilities.cs
3	//
4	// Author:
5	// Jb Evain (jbevain@gmail.com)
6	//
7	// Copyright (c) 2008 - 2011 Jb Evain
8	//
9	// Permission is hereby granted, free of charge, to any person obtaining
10	// a copy of this software and associated documentation files (the
11	// "Software"), to deal in the Software without restriction, including
12	// without limitation the rights to use, copy, modify, merge, publish,
13	// distribute, sublicense, and/or sell copies of the Software, and to
14	// permit persons to whom the Software is furnished to do so, subject to
15	// the following conditions:
16	//
17	// The above copyright notice and this permission notice shall be
18	// included in all copies or substantial portions of the Software.
19	//
20	// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
21	// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22	// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
23	// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
24	// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
25	// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
26	// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
27	//
28
29	using System;
30
31	using Mono.Cecil.Metadata;
32
33	namespace Mono.Cecil {
34
35	static partial class Mixin {
36
37	public static uint ReadCompressedUInt32 (this byte [] data, ref int position)
38	{
39	uint integer;
40	if ((data [position] & 0x80) == 0) {
41	integer = data [position];
42	position++;
43	} else if ((data [position] & 0x40) == 0) {
44	integer = (uint) (data [position] & ~0x80) << 8;
45	integer \|= data [position + 1];
46	position += 2;
47	} else {
48	integer = (uint) (data [position] & ~0xc0) << 24;
49	integer \|= (uint) data [position + 1] << 16;
50	integer \|= (uint) data [position + 2] << 8;
51	integer \|= (uint) data [position + 3];
52	position += 4;
53	}
54	return integer;
55	}
56
57	public static MetadataToken GetMetadataToken (this CodedIndex self, uint data)
58	{
59	uint rid;
60	TokenType token_type;
61	switch (self) {
62	case CodedIndex.TypeDefOrRef:
63	rid = data >> 2;
64	switch (data & 3) {
65	case 0:
66	token_type = TokenType.TypeDef; goto ret;
67	case 1:
68	token_type = TokenType.TypeRef; goto ret;
69	case 2:
70	token_type = TokenType.TypeSpec; goto ret;
71	default:
72	goto exit;
73	}
74	case CodedIndex.HasConstant:
75	rid = data >> 2;
76	switch (data & 3) {
77	case 0:
78	token_type = TokenType.Field; goto ret;
79	case 1:
80	token_type = TokenType.Param; goto ret;
81	case 2:
82	token_type = TokenType.Property; goto ret;
83	default:
84	goto exit;
85	}
86	case CodedIndex.HasCustomAttribute:
87	rid = data >> 5;
88	switch (data & 31) {
89	case 0:
90	token_type = TokenType.Method; goto ret;
91	case 1:
92	token_type = TokenType.Field; goto ret;
93	case 2:
94	token_type = TokenType.TypeRef; goto ret;
95	case 3:
96	token_type = TokenType.TypeDef; goto ret;
97	case 4:
98	token_type = TokenType.Param; goto ret;
99	case 5:
100	token_type = TokenType.InterfaceImpl; goto ret;
101	case 6:
102	token_type = TokenType.MemberRef; goto ret;
103	case 7:
104	token_type = TokenType.Module; goto ret;
105	case 8:
106	token_type = TokenType.Permission; goto ret;
107	case 9:
108	token_type = TokenType.Property; goto ret;
109	case 10:
110	token_type = TokenType.Event; goto ret;
111	case 11:
112	token_type = TokenType.Signature; goto ret;
113	case 12:
114	token_type = TokenType.ModuleRef; goto ret;
115	case 13:
116	token_type = TokenType.TypeSpec; goto ret;
117	case 14:
118	token_type = TokenType.Assembly; goto ret;
119	case 15:
120	token_type = TokenType.AssemblyRef; goto ret;
121	case 16:
122	token_type = TokenType.File; goto ret;
123	case 17:
124	token_type = TokenType.ExportedType; goto ret;
125	case 18:
126	token_type = TokenType.ManifestResource; goto ret;
127	case 19:
128	token_type = TokenType.GenericParam; goto ret;
129	default:
130	goto exit;
131	}
132	case CodedIndex.HasFieldMarshal:
133	rid = data >> 1;
134	switch (data & 1) {
135	case 0:
136	token_type = TokenType.Field; goto ret;
137	case 1:
138	token_type = TokenType.Param; goto ret;
139	default:
140	goto exit;
141	}
142	case CodedIndex.HasDeclSecurity:
143	rid = data >> 2;
144	switch (data & 3) {
145	case 0:
146	token_type = TokenType.TypeDef; goto ret;
147	case 1:
148	token_type = TokenType.Method; goto ret;
149	case 2:
150	token_type = TokenType.Assembly; goto ret;
151	default:
152	goto exit;
153	}
154	case CodedIndex.MemberRefParent:
155	rid = data >> 3;
156	switch (data & 7) {
157	case 0:
158	token_type = TokenType.TypeDef; goto ret;
159	case 1:
160	token_type = TokenType.TypeRef; goto ret;
161	case 2:
162	token_type = TokenType.ModuleRef; goto ret;
163	case 3:
164	token_type = TokenType.Method; goto ret;
165	case 4:
166	token_type = TokenType.TypeSpec; goto ret;
167	default:
168	goto exit;
169	}
170	case CodedIndex.HasSemantics:
171	rid = data >> 1;
172	switch (data & 1) {
173	case 0:
174	token_type = TokenType.Event; goto ret;
175	case 1:
176	token_type = TokenType.Property; goto ret;
177	default:
178	goto exit;
179	}
180	case CodedIndex.MethodDefOrRef:
181	rid = data >> 1;
182	switch (data & 1) {
183	case 0:
184	token_type = TokenType.Method; goto ret;
185	case 1:
186	token_type = TokenType.MemberRef; goto ret;
187	default:
188	goto exit;
189	}
190	case CodedIndex.MemberForwarded:
191	rid = data >> 1;
192	switch (data & 1) {
193	case 0:
194	token_type = TokenType.Field; goto ret;
195	case 1:
196	token_type = TokenType.Method; goto ret;
197	default:
198	goto exit;
199	}
200	case CodedIndex.Implementation:
201	rid = data >> 2;
202	switch (data & 3) {
203	case 0:
204	token_type = TokenType.File; goto ret;
205	case 1:
206	token_type = TokenType.AssemblyRef; goto ret;
207	case 2:
208	token_type = TokenType.ExportedType; goto ret;
209	default:
210	goto exit;
211	}
212	case CodedIndex.CustomAttributeType:
213	rid = data >> 3;
214	switch (data & 7) {
215	case 2:
216	token_type = TokenType.Method; goto ret;
217	case 3:
218	token_type = TokenType.MemberRef; goto ret;
219	default:
220	goto exit;
221	}
222	case CodedIndex.ResolutionScope:
223	rid = data >> 2;
224	switch (data & 3) {
225	case 0:
226	token_type = TokenType.Module; goto ret;
227	case 1:
228	token_type = TokenType.ModuleRef; goto ret;
229	case 2:
230	token_type = TokenType.AssemblyRef; goto ret;
231	case 3:
232	token_type = TokenType.TypeRef; goto ret;
233	default:
234	goto exit;
235	}
236	case CodedIndex.TypeOrMethodDef:
237	rid = data >> 1;
238	switch (data & 1) {
239	case 0:
240	token_type = TokenType.TypeDef; goto ret;
241	case 1:
242	token_type = TokenType.Method; goto ret;
243	default: goto exit;
244	}
245	default:
246	goto exit;
247	}
248	ret:
249	return new MetadataToken (token_type, rid);
250	exit:
251	return MetadataToken.Zero;
252	}
253
254	#if !READ_ONLY
255	public static uint CompressMetadataToken (this CodedIndex self, MetadataToken token)
256	{
257	uint ret = 0;
258	if (token.RID == 0)
259	return ret;
260	switch (self) {
261	case CodedIndex.TypeDefOrRef:
262	ret = token.RID << 2;
263	switch (token.TokenType) {
264	case TokenType.TypeDef:
265	return ret \| 0;
266	case TokenType.TypeRef:
267	return ret \| 1;
268	case TokenType.TypeSpec:
269	return ret \| 2;
270	default:
271	goto exit;
272	}
273	case CodedIndex.HasConstant:
274	ret = token.RID << 2;
275	switch (token.TokenType) {
276	case TokenType.Field:
277	return ret \| 0;
278	case TokenType.Param:
279	return ret \| 1;
280	case TokenType.Property:
281	return ret \| 2;
282	default:
283	goto exit;
284	}
285	case CodedIndex.HasCustomAttribute:
286	ret = token.RID << 5;
287	switch (token.TokenType) {
288	case TokenType.Method:
289	return ret \| 0;
290	case TokenType.Field:
291	return ret \| 1;
292	case TokenType.TypeRef:
293	return ret \| 2;
294	case TokenType.TypeDef:
295	return ret \| 3;
296	case TokenType.Param:
297	return ret \| 4;
298	case TokenType.InterfaceImpl:
299	return ret \| 5;
300	case TokenType.MemberRef:
301	return ret \| 6;
302	case TokenType.Module:
303	return ret \| 7;
304	case TokenType.Permission:
305	return ret \| 8;
306	case TokenType.Property:
307	return ret \| 9;
308	case TokenType.Event:
309	return ret \| 10;
310	case TokenType.Signature:
311	return ret \| 11;
312	case TokenType.ModuleRef:
313	return ret \| 12;
314	case TokenType.TypeSpec:
315	return ret \| 13;
316	case TokenType.Assembly:
317	return ret \| 14;
318	case TokenType.AssemblyRef:
319	return ret \| 15;
320	case TokenType.File:
321	return ret \| 16;
322	case TokenType.ExportedType:
323	return ret \| 17;
324	case TokenType.ManifestResource:
325	return ret \| 18;
326	case TokenType.GenericParam:
327	return ret \| 19;
328	default:
329	goto exit;
330	}
331	case CodedIndex.HasFieldMarshal:
332	ret = token.RID << 1;
333	switch (token.TokenType) {
334	case TokenType.Field:
335	return ret \| 0;
336	case TokenType.Param:
337	return ret \| 1;
338	default:
339	goto exit;
340	}
341	case CodedIndex.HasDeclSecurity:
342	ret = token.RID << 2;
343	switch (token.TokenType) {
344	case TokenType.TypeDef:
345	return ret \| 0;
346	case TokenType.Method:
347	return ret \| 1;
348	case TokenType.Assembly:
349	return ret \| 2;
350	default:
351	goto exit;
352	}
353	case CodedIndex.MemberRefParent:
354	ret = token.RID << 3;
355	switch (token.TokenType) {
356	case TokenType.TypeDef:
357	return ret \| 0;
358	case TokenType.TypeRef:
359	return ret \| 1;
360	case TokenType.ModuleRef:
361	return ret \| 2;
362	case TokenType.Method:
363	return ret \| 3;
364	case TokenType.TypeSpec:
365	return ret \| 4;
366	default:
367	goto exit;
368	}
369	case CodedIndex.HasSemantics:
370	ret = token.RID << 1;
371	switch (token.TokenType) {
372	case TokenType.Event:
373	return ret \| 0;
374	case TokenType.Property:
375	return ret \| 1;
376	default:
377	goto exit;
378	}
379	case CodedIndex.MethodDefOrRef:
380	ret = token.RID << 1;
381	switch (token.TokenType) {
382	case TokenType.Method:
383	return ret \| 0;
384	case TokenType.MemberRef:
385	return ret \| 1;
386	default:
387	goto exit;
388	}
389	case CodedIndex.MemberForwarded:
390	ret = token.RID << 1;
391	switch (token.TokenType) {
392	case TokenType.Field:
393	return ret \| 0;
394	case TokenType.Method:
395	return ret \| 1;
396	default:
397	goto exit;
398	}
399	case CodedIndex.Implementation:
400	ret = token.RID << 2;
401	switch (token.TokenType) {
402	case TokenType.File:
403	return ret \| 0;
404	case TokenType.AssemblyRef:
405	return ret \| 1;
406	case TokenType.ExportedType:
407	return ret \| 2;
408	default:
409	goto exit;
410	}
411	case CodedIndex.CustomAttributeType:
412	ret = token.RID << 3;
413	switch (token.TokenType) {
414	case TokenType.Method:
415	return ret \| 2;
416	case TokenType.MemberRef:
417	return ret \| 3;
418	default:
419	goto exit;
420	}
421	case CodedIndex.ResolutionScope:
422	ret = token.RID << 2;
423	switch (token.TokenType) {
424	case TokenType.Module:
425	return ret \| 0;
426	case TokenType.ModuleRef:
427	return ret \| 1;
428	case TokenType.AssemblyRef:
429	return ret \| 2;
430	case TokenType.TypeRef:
431	return ret \| 3;
432	default:
433	goto exit;
434	}
435	case CodedIndex.TypeOrMethodDef:
436	ret = token.RID << 1;
437	switch (token.TokenType) {
438	case TokenType.TypeDef:
439	return ret \| 0;
440	case TokenType.Method:
441	return ret \| 1;
442	default:
443	goto exit;
444	}
445	default:
446	goto exit;
447	}
448	exit:
449	throw new ArgumentException ();
450	}
451	#endif
452
453	public static int GetSize (this CodedIndex self, Func<Table, int> counter)
454	{
455	int bits;
456	Table [] tables;
457
458	switch (self) {
459	case CodedIndex.TypeDefOrRef:
460	bits = 2;
461	tables = new [] { Table.TypeDef, Table.TypeRef, Table.TypeSpec };
462	break;
463	case CodedIndex.HasConstant:
464	bits = 2;
465	tables = new [] { Table.Field, Table.Param, Table.Property };
466	break;
467	case CodedIndex.HasCustomAttribute:
468	bits = 5;
469	tables = new [] {
470	Table.Method, Table.Field, Table.TypeRef, Table.TypeDef, Table.Param, Table.InterfaceImpl, Table.MemberRef,
471	Table.Module, Table.DeclSecurity, Table.Property, Table.Event, Table.StandAloneSig, Table.ModuleRef,
472	Table.TypeSpec, Table.Assembly, Table.AssemblyRef, Table.File, Table.ExportedType,
473	Table.ManifestResource, Table.GenericParam
474	};
475	break;
476	case CodedIndex.HasFieldMarshal:
477	bits = 1;
478	tables = new [] { Table.Field, Table.Param };
479	break;
480	case CodedIndex.HasDeclSecurity:
481	bits = 2;
482	tables = new [] { Table.TypeDef, Table.Method, Table.Assembly };
483	break;
484	case CodedIndex.MemberRefParent:
485	bits = 3;
486	tables = new [] { Table.TypeDef, Table.TypeRef, Table.ModuleRef, Table.Method, Table.TypeSpec };
487	break;
488	case CodedIndex.HasSemantics:
489	bits = 1;
490	tables = new [] { Table.Event, Table.Property };
491	break;
492	case CodedIndex.MethodDefOrRef:
493	bits = 1;
494	tables = new [] { Table.Method, Table.MemberRef };
495	break;
496	case CodedIndex.MemberForwarded:
497	bits = 1;
498	tables = new [] { Table.Field, Table.Method };
499	break;
500	case CodedIndex.Implementation:
501	bits = 2;
502	tables = new [] { Table.File, Table.AssemblyRef, Table.ExportedType };
503	break;
504	case CodedIndex.CustomAttributeType:
505	bits = 3;
506	tables = new [] { Table.Method, Table.MemberRef };
507	break;
508	case CodedIndex.ResolutionScope:
509	bits = 2;
510	tables = new [] { Table.Module, Table.ModuleRef, Table.AssemblyRef, Table.TypeRef };
511	break;
512	case CodedIndex.TypeOrMethodDef:
513	bits = 1;
514	tables = new [] { Table.TypeDef, Table.Method };
515	break;
516	default:
517	throw new ArgumentException ();
518	}
519
520	int max = 0;
521
522	for (int i = 0; i < tables.Length; i++) {
523	max = System.Math.Max (counter (tables [i]), max);
524	}
525
526	return max < (1 << (16 - bits)) ? 2 : 4;
527	}
528	}
529	}

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