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/*
* System.Reflection-like API for access to .NET assemblies (DLL & EXE)
*/
package ch.epfl.lamp.compiler.msil;
/**
* Specifies type attributes.
*
* @author Nikolay Mihaylov
* @version 1.0
*/
public final class TypeAttributes {
//##########################################################################
// Visibilty attributes
/** Bitmask used to retrieve visibility information. */
public static final int VisibilityMask = 0x00000007;
/** Class has no public scope. */
public static final int NotPublic = 0x00000000;
/** Class has public scope. */
public static final int Public = 0x00000001;
/** Class is nested with public visibility. */
public static final int NestedPublic = 0x00000002;
/** Class is nested with private visibility. */
public static final int NestedPrivate = 0x00000003;
/** Class is nested with family visibility, and is thus accessible
* only by methods within its own type and any subtypes. */
public static final int NestedFamily = 0x00000004;
/** Class is nested with assembly visibility, and is thus accessible
* only by methods within its assembly. */
public static final int NestedAssembly = 0x00000005;
/** Class is nested with assembly and family visibility, and is thus accessible
* only by methods lying in the intersection of its family and assembly. */
public static final int NestedFamANDAssem = 0x00000006;
/** Class is nested with family or assembly visibility, and is thus accessible
* only by methods lying in the union of its family and assembly. */
public static final int NestedFamORAssem = 0x00000007;
//##########################################################################
// Class layout attributes
/** Bitmask used to retrieve class layout information. */
public static final int LayoutMask = 0x00000018;
/** Class fields are automatically laid out by the CLR. */
public static final int AutoLayout = 0x00000000;
/** Class fields are laid out sequentially, in the order that the fields
* were emitted to the metadata. */
public static final int SequentialLayout = 0x00000008;
/** Class fields are laid out at the specified offsets. */
public static final int ExplicitLayout = 0x00000010;
//##########################################################################
// Class semantics attributes
/** Bitmask used to retrieve class semantics information. */
public static final int ClassSemanticsMask = 0x00000020;
/** Type is a class. */
public static final int Class = 0x00000000;
/** Type is an interface. */
public static final int Interface = 0x00000020;
//##########################################################################
// Special semantics in addition to class semantics
/** Class is abstract. */
public static final int Abstract = 0x00000080;
/** Class is cannot be extended. */
public static final int Sealed = 0x00000100;
/** Class is special in a way denoted by the name. */
public static final int SpecialName = 0x00000400;
//##########################################################################
// Implementation attributes
/** Class/interface is imported from another module. */
public static final int Import = 0x00001000;
/** Class can be serialized. */
public static final int Serializable = 0x00002000;
//##########################################################################
// String formatting attributes
/** Bitmask used to retrieve string information for native interop. */
public static final int StringFormatMask = 0x00030000;
/** LPTSTR is interpreted as ANSI. */
public static final int AnsiClass = 0x00000000;
/** LPTSTR is interpreted as UNICODE. */
public static final int UnicodeClass = 0x00010000;
/** LPTSTR is interpreted automatically. */
public static final int AutoClass = 0x00020000;
//##########################################################################
// Class initialization attributes
/** Initialize the class before first static field access. */
public static final int BeforeFieldInit = 0x00100000;
//##########################################################################
// Additional flags
/** CLI provides 'special' behavior, depending upon the name of the type. */
public static final int RTSpecialName = 0x00000800;
/** Type has security associate with it. */
public static final int HasSecurity = 0x00040000;
//##########################################################################
public static String accessModsToString(int attrs) {
switch (attrs & VisibilityMask) {
case NotPublic: return "private";
case Public: return "public";
case NestedPublic: return "nested public";
case NestedPrivate: return "nested private";
case NestedFamily: return "nested family";
case NestedAssembly: return "nested assembly";
case NestedFamANDAssem: return "nested famandassem";
case NestedFamORAssem: return "nested famorassem";
default:
throw new RuntimeException();
}
}
/** Returns a string representation of the given attributes. */
public static String toString(int attrs) {
StringBuffer str = new StringBuffer(accessModsToString(attrs));
switch (attrs & LayoutMask) {
case AutoLayout: str.append(" auto"); break;
case SequentialLayout: str.append(" sequential"); break;
case ExplicitLayout: str.append(" explicit"); break;
}
switch (attrs & StringFormatMask) {
case AnsiClass: str.append(" ansi"); break;
case UnicodeClass: str.append(" unicode"); break;
case AutoClass: str.append(" autochar"); break;
}
if ((attrs & Interface) != 0) str.append(" interface");
if ((attrs & Abstract) != 0) str.append(" abstract");
if ((attrs & Sealed) != 0) str.append(" sealed");
if ((attrs & BeforeFieldInit) != 0) str.append(" beforefieldinit");
if ((attrs & Serializable) != 0) str.append(" serializable");
if ((attrs & SpecialName) != 0) str.append(" specialname");
if ((attrs & RTSpecialName) != 0) str.append(" rtspecialname");
return str.toString();
}
/***/
public static final boolean isNested(int attrs) {
switch (attrs & VisibilityMask) {
case NestedPublic:
case NestedPrivate:
case NestedFamily:
case NestedAssembly:
case NestedFamANDAssem:
case NestedFamORAssem:
return true;
default: return false;
}
}
//##########################################################################
// makes the class uninstantiable
private TypeAttributes() {}
//##########################################################################
} // class TypeAttributes
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