530 lines
13 KiB
C#
530 lines
13 KiB
C#
//
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// Utilities.cs
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//
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// Author:
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// Jb Evain (jbevain@gmail.com)
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//
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// Copyright (c) 2008 - 2011 Jb Evain
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System;
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using Mono.Cecil.Metadata;
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namespace Mono.Cecil {
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static partial class Mixin {
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public static uint ReadCompressedUInt32 (this byte [] data, ref int position)
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{
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uint integer;
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if ((data [position] & 0x80) == 0) {
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integer = data [position];
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position++;
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} else if ((data [position] & 0x40) == 0) {
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integer = (uint) (data [position] & ~0x80) << 8;
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integer |= data [position + 1];
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position += 2;
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} else {
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integer = (uint) (data [position] & ~0xc0) << 24;
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integer |= (uint) data [position + 1] << 16;
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integer |= (uint) data [position + 2] << 8;
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integer |= (uint) data [position + 3];
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position += 4;
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}
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return integer;
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}
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public static MetadataToken GetMetadataToken (this CodedIndex self, uint data)
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{
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uint rid;
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TokenType token_type;
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switch (self) {
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case CodedIndex.TypeDefOrRef:
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rid = data >> 2;
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switch (data & 3) {
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case 0:
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token_type = TokenType.TypeDef; goto ret;
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case 1:
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token_type = TokenType.TypeRef; goto ret;
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case 2:
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token_type = TokenType.TypeSpec; goto ret;
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default:
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goto exit;
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}
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case CodedIndex.HasConstant:
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rid = data >> 2;
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switch (data & 3) {
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case 0:
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token_type = TokenType.Field; goto ret;
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case 1:
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token_type = TokenType.Param; goto ret;
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case 2:
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token_type = TokenType.Property; goto ret;
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default:
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goto exit;
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}
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case CodedIndex.HasCustomAttribute:
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rid = data >> 5;
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switch (data & 31) {
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case 0:
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token_type = TokenType.Method; goto ret;
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case 1:
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token_type = TokenType.Field; goto ret;
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case 2:
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token_type = TokenType.TypeRef; goto ret;
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case 3:
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token_type = TokenType.TypeDef; goto ret;
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case 4:
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token_type = TokenType.Param; goto ret;
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case 5:
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token_type = TokenType.InterfaceImpl; goto ret;
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case 6:
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token_type = TokenType.MemberRef; goto ret;
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case 7:
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token_type = TokenType.Module; goto ret;
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case 8:
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token_type = TokenType.Permission; goto ret;
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case 9:
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token_type = TokenType.Property; goto ret;
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case 10:
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token_type = TokenType.Event; goto ret;
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case 11:
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token_type = TokenType.Signature; goto ret;
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case 12:
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token_type = TokenType.ModuleRef; goto ret;
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case 13:
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token_type = TokenType.TypeSpec; goto ret;
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case 14:
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token_type = TokenType.Assembly; goto ret;
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case 15:
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token_type = TokenType.AssemblyRef; goto ret;
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case 16:
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token_type = TokenType.File; goto ret;
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case 17:
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token_type = TokenType.ExportedType; goto ret;
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case 18:
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token_type = TokenType.ManifestResource; goto ret;
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case 19:
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token_type = TokenType.GenericParam; goto ret;
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default:
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goto exit;
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}
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case CodedIndex.HasFieldMarshal:
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rid = data >> 1;
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switch (data & 1) {
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case 0:
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token_type = TokenType.Field; goto ret;
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case 1:
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token_type = TokenType.Param; goto ret;
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default:
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goto exit;
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}
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case CodedIndex.HasDeclSecurity:
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rid = data >> 2;
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switch (data & 3) {
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case 0:
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token_type = TokenType.TypeDef; goto ret;
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case 1:
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token_type = TokenType.Method; goto ret;
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case 2:
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token_type = TokenType.Assembly; goto ret;
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default:
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goto exit;
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}
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case CodedIndex.MemberRefParent:
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rid = data >> 3;
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switch (data & 7) {
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case 0:
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token_type = TokenType.TypeDef; goto ret;
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case 1:
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token_type = TokenType.TypeRef; goto ret;
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case 2:
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token_type = TokenType.ModuleRef; goto ret;
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case 3:
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token_type = TokenType.Method; goto ret;
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case 4:
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token_type = TokenType.TypeSpec; goto ret;
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default:
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goto exit;
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}
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case CodedIndex.HasSemantics:
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rid = data >> 1;
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switch (data & 1) {
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case 0:
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token_type = TokenType.Event; goto ret;
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case 1:
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token_type = TokenType.Property; goto ret;
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default:
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goto exit;
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}
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case CodedIndex.MethodDefOrRef:
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rid = data >> 1;
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switch (data & 1) {
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case 0:
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token_type = TokenType.Method; goto ret;
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case 1:
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token_type = TokenType.MemberRef; goto ret;
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default:
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goto exit;
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}
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case CodedIndex.MemberForwarded:
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rid = data >> 1;
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switch (data & 1) {
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case 0:
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token_type = TokenType.Field; goto ret;
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case 1:
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token_type = TokenType.Method; goto ret;
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default:
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goto exit;
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}
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case CodedIndex.Implementation:
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rid = data >> 2;
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switch (data & 3) {
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case 0:
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token_type = TokenType.File; goto ret;
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case 1:
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token_type = TokenType.AssemblyRef; goto ret;
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case 2:
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token_type = TokenType.ExportedType; goto ret;
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default:
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goto exit;
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}
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case CodedIndex.CustomAttributeType:
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rid = data >> 3;
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switch (data & 7) {
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case 2:
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token_type = TokenType.Method; goto ret;
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case 3:
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token_type = TokenType.MemberRef; goto ret;
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default:
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goto exit;
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}
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case CodedIndex.ResolutionScope:
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rid = data >> 2;
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switch (data & 3) {
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case 0:
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token_type = TokenType.Module; goto ret;
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case 1:
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token_type = TokenType.ModuleRef; goto ret;
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case 2:
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token_type = TokenType.AssemblyRef; goto ret;
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case 3:
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token_type = TokenType.TypeRef; goto ret;
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default:
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goto exit;
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}
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case CodedIndex.TypeOrMethodDef:
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rid = data >> 1;
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switch (data & 1) {
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case 0:
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token_type = TokenType.TypeDef; goto ret;
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case 1:
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token_type = TokenType.Method; goto ret;
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default: goto exit;
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}
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default:
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goto exit;
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}
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ret:
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return new MetadataToken (token_type, rid);
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exit:
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return MetadataToken.Zero;
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}
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#if !READ_ONLY
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public static uint CompressMetadataToken (this CodedIndex self, MetadataToken token)
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{
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uint ret = 0;
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if (token.RID == 0)
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return ret;
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switch (self) {
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case CodedIndex.TypeDefOrRef:
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ret = token.RID << 2;
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switch (token.TokenType) {
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case TokenType.TypeDef:
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return ret | 0;
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case TokenType.TypeRef:
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return ret | 1;
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case TokenType.TypeSpec:
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return ret | 2;
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default:
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goto exit;
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}
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case CodedIndex.HasConstant:
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ret = token.RID << 2;
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switch (token.TokenType) {
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case TokenType.Field:
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return ret | 0;
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case TokenType.Param:
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return ret | 1;
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case TokenType.Property:
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return ret | 2;
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default:
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goto exit;
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}
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case CodedIndex.HasCustomAttribute:
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ret = token.RID << 5;
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switch (token.TokenType) {
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case TokenType.Method:
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return ret | 0;
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case TokenType.Field:
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return ret | 1;
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case TokenType.TypeRef:
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return ret | 2;
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case TokenType.TypeDef:
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return ret | 3;
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case TokenType.Param:
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return ret | 4;
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case TokenType.InterfaceImpl:
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return ret | 5;
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case TokenType.MemberRef:
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return ret | 6;
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case TokenType.Module:
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return ret | 7;
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case TokenType.Permission:
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return ret | 8;
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case TokenType.Property:
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return ret | 9;
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case TokenType.Event:
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return ret | 10;
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case TokenType.Signature:
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return ret | 11;
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case TokenType.ModuleRef:
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return ret | 12;
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case TokenType.TypeSpec:
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return ret | 13;
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case TokenType.Assembly:
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return ret | 14;
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case TokenType.AssemblyRef:
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return ret | 15;
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case TokenType.File:
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return ret | 16;
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case TokenType.ExportedType:
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return ret | 17;
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case TokenType.ManifestResource:
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return ret | 18;
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case TokenType.GenericParam:
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return ret | 19;
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default:
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goto exit;
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}
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case CodedIndex.HasFieldMarshal:
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ret = token.RID << 1;
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switch (token.TokenType) {
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case TokenType.Field:
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return ret | 0;
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case TokenType.Param:
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return ret | 1;
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default:
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goto exit;
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}
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case CodedIndex.HasDeclSecurity:
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ret = token.RID << 2;
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switch (token.TokenType) {
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case TokenType.TypeDef:
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return ret | 0;
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case TokenType.Method:
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return ret | 1;
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case TokenType.Assembly:
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return ret | 2;
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default:
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goto exit;
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}
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case CodedIndex.MemberRefParent:
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ret = token.RID << 3;
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switch (token.TokenType) {
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case TokenType.TypeDef:
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return ret | 0;
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case TokenType.TypeRef:
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return ret | 1;
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case TokenType.ModuleRef:
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return ret | 2;
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case TokenType.Method:
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return ret | 3;
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case TokenType.TypeSpec:
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return ret | 4;
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default:
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goto exit;
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}
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case CodedIndex.HasSemantics:
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ret = token.RID << 1;
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switch (token.TokenType) {
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case TokenType.Event:
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return ret | 0;
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case TokenType.Property:
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return ret | 1;
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default:
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goto exit;
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}
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case CodedIndex.MethodDefOrRef:
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ret = token.RID << 1;
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switch (token.TokenType) {
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case TokenType.Method:
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return ret | 0;
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case TokenType.MemberRef:
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return ret | 1;
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default:
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goto exit;
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}
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case CodedIndex.MemberForwarded:
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ret = token.RID << 1;
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switch (token.TokenType) {
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case TokenType.Field:
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return ret | 0;
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case TokenType.Method:
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return ret | 1;
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default:
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goto exit;
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}
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case CodedIndex.Implementation:
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ret = token.RID << 2;
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switch (token.TokenType) {
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case TokenType.File:
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return ret | 0;
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case TokenType.AssemblyRef:
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return ret | 1;
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case TokenType.ExportedType:
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return ret | 2;
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default:
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goto exit;
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}
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case CodedIndex.CustomAttributeType:
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ret = token.RID << 3;
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switch (token.TokenType) {
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case TokenType.Method:
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return ret | 2;
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case TokenType.MemberRef:
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return ret | 3;
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default:
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goto exit;
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}
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case CodedIndex.ResolutionScope:
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ret = token.RID << 2;
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switch (token.TokenType) {
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case TokenType.Module:
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return ret | 0;
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case TokenType.ModuleRef:
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return ret | 1;
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case TokenType.AssemblyRef:
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return ret | 2;
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case TokenType.TypeRef:
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return ret | 3;
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default:
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goto exit;
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}
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case CodedIndex.TypeOrMethodDef:
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ret = token.RID << 1;
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switch (token.TokenType) {
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case TokenType.TypeDef:
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return ret | 0;
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case TokenType.Method:
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return ret | 1;
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default:
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goto exit;
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}
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default:
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goto exit;
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}
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exit:
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throw new ArgumentException ();
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}
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#endif
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public static int GetSize (this CodedIndex self, Func<Table, int> counter)
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{
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int bits;
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Table [] tables;
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switch (self) {
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case CodedIndex.TypeDefOrRef:
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bits = 2;
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tables = new [] { Table.TypeDef, Table.TypeRef, Table.TypeSpec };
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break;
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case CodedIndex.HasConstant:
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bits = 2;
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tables = new [] { Table.Field, Table.Param, Table.Property };
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break;
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case CodedIndex.HasCustomAttribute:
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bits = 5;
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tables = new [] {
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Table.Method, Table.Field, Table.TypeRef, Table.TypeDef, Table.Param, Table.InterfaceImpl, Table.MemberRef,
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Table.Module, Table.DeclSecurity, Table.Property, Table.Event, Table.StandAloneSig, Table.ModuleRef,
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Table.TypeSpec, Table.Assembly, Table.AssemblyRef, Table.File, Table.ExportedType,
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Table.ManifestResource, Table.GenericParam
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};
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break;
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case CodedIndex.HasFieldMarshal:
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bits = 1;
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tables = new [] { Table.Field, Table.Param };
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break;
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case CodedIndex.HasDeclSecurity:
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bits = 2;
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tables = new [] { Table.TypeDef, Table.Method, Table.Assembly };
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break;
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case CodedIndex.MemberRefParent:
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bits = 3;
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tables = new [] { Table.TypeDef, Table.TypeRef, Table.ModuleRef, Table.Method, Table.TypeSpec };
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break;
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case CodedIndex.HasSemantics:
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bits = 1;
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tables = new [] { Table.Event, Table.Property };
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break;
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case CodedIndex.MethodDefOrRef:
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bits = 1;
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tables = new [] { Table.Method, Table.MemberRef };
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break;
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case CodedIndex.MemberForwarded:
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bits = 1;
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tables = new [] { Table.Field, Table.Method };
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break;
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case CodedIndex.Implementation:
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bits = 2;
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tables = new [] { Table.File, Table.AssemblyRef, Table.ExportedType };
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break;
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case CodedIndex.CustomAttributeType:
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bits = 3;
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tables = new [] { Table.Method, Table.MemberRef };
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break;
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case CodedIndex.ResolutionScope:
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bits = 2;
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tables = new [] { Table.Module, Table.ModuleRef, Table.AssemblyRef, Table.TypeRef };
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break;
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case CodedIndex.TypeOrMethodDef:
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bits = 1;
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tables = new [] { Table.TypeDef, Table.Method };
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break;
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default:
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throw new ArgumentException ();
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}
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int max = 0;
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for (int i = 0; i < tables.Length; i++) {
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max = System.Math.Max (counter (tables [i]), max);
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}
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return max < (1 << (16 - bits)) ? 2 : 4;
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}
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}
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}
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