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Copy patharray.cs
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3083 lines (2691 loc) · 131 KB
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// ==++==
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// ==--==
/*============================================================
**
** Class: Array
**
** Purpose: Base class which can be used to access any array
**
===========================================================*/
namespace System {
using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Runtime.InteropServices;
using System.Runtime.CompilerServices;
using System.Runtime.ConstrainedExecution;
using System.Runtime.Versioning;
using System.Security;
using System.Security.Permissions;
using System.Diagnostics.Contracts;
// Note that we make a T[] (single-dimensional w/ zero as the lower bound) implement both
// IList<U> and IReadOnlyList<U>, where T : U dynamically. See the SZArrayHelper class for details.
[Serializable]
[ComVisible(true)]
#if CONTRACTS_FULL
[ContractClass(typeof(ArrayContracts))]
#endif
public abstract class Array : ICloneable, IList, IStructuralComparable, IStructuralEquatable
{
/// <internalonly/>
internal Array() {} // Don't call this. Internal for ArrayContracts type.
public static ReadOnlyCollection<T> AsReadOnly<T>(T[] array) {
if (array == null) {
throw new ArgumentNullException("array");
}
Contract.Ensures(Contract.Result<ReadOnlyCollection<T>>() != null);
// T[] implements IList<T>.
return new ReadOnlyCollection<T>(array);
}
[ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)]
public static void Resize<T>(ref T[] array, int newSize) {
if (newSize < 0)
throw new ArgumentOutOfRangeException("newSize", Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum"));
Contract.Ensures(Contract.ValueAtReturn(out array) != null);
Contract.Ensures(Contract.ValueAtReturn(out array).Length == newSize);
Contract.EndContractBlock();
T[] larray = array;
if (larray == null) {
array = new T[newSize];
return;
}
if (larray.Length != newSize) {
T[] newArray = new T[newSize];
Array.Copy(larray, 0, newArray, 0, larray.Length > newSize? newSize : larray.Length);
array = newArray;
}
}
// Create instance will create an array
[System.Security.SecuritySafeCritical] // auto-generated
public unsafe static Array CreateInstance(Type elementType, int length)
{
if ((object)elementType == null)
throw new ArgumentNullException("elementType");
if (length < 0)
throw new ArgumentOutOfRangeException("length", Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum"));
Contract.Ensures(Contract.Result<Array>() != null);
Contract.Ensures(Contract.Result<Array>().Length == length);
Contract.Ensures(Contract.Result<Array>().Rank == 1);
Contract.EndContractBlock();
RuntimeType t = elementType.UnderlyingSystemType as RuntimeType;
if (t == null)
throw new ArgumentException(Environment.GetResourceString("Arg_MustBeType"),"elementType");
return InternalCreate((void*)t.TypeHandle.Value,1,&length,null);
}
[System.Security.SecuritySafeCritical] // auto-generated
public unsafe static Array CreateInstance(Type elementType, int length1, int length2)
{
if ((object)elementType == null)
throw new ArgumentNullException("elementType");
if (length1 < 0 || length2 < 0)
throw new ArgumentOutOfRangeException((length1 < 0 ? "length1" : "length2"), Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum"));
Contract.Ensures(Contract.Result<Array>() != null);
Contract.Ensures(Contract.Result<Array>().Rank == 2);
Contract.Ensures(Contract.Result<Array>().GetLength(0) == length1);
Contract.Ensures(Contract.Result<Array>().GetLength(1) == length2);
RuntimeType t = elementType.UnderlyingSystemType as RuntimeType;
if (t == null)
throw new ArgumentException(Environment.GetResourceString("Arg_MustBeType"),"elementType");
int* pLengths = stackalloc int[2];
pLengths[0] = length1;
pLengths[1] = length2;
return InternalCreate((void*)t.TypeHandle.Value,2,pLengths,null);
}
[System.Security.SecuritySafeCritical] // auto-generated
public unsafe static Array CreateInstance(Type elementType, int length1, int length2, int length3)
{
if ((object)elementType == null)
throw new ArgumentNullException("elementType");
if (length1 < 0)
throw new ArgumentOutOfRangeException("length1", Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum"));
if (length2 < 0)
throw new ArgumentOutOfRangeException("length2", Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum"));
if (length3 < 0)
throw new ArgumentOutOfRangeException("length3", Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum"));
Contract.Ensures(Contract.Result<Array>() != null);
Contract.Ensures(Contract.Result<Array>().Rank == 3);
Contract.Ensures(Contract.Result<Array>().GetLength(0) == length1);
Contract.Ensures(Contract.Result<Array>().GetLength(1) == length2);
Contract.Ensures(Contract.Result<Array>().GetLength(2) == length3);
RuntimeType t = elementType.UnderlyingSystemType as RuntimeType;
if (t == null)
throw new ArgumentException(Environment.GetResourceString("Arg_MustBeType"), "elementType");
int* pLengths = stackalloc int[3];
pLengths[0] = length1;
pLengths[1] = length2;
pLengths[2] = length3;
return InternalCreate((void*)t.TypeHandle.Value,3,pLengths,null);
}
[System.Security.SecuritySafeCritical] // auto-generated
public unsafe static Array CreateInstance(Type elementType, params int[] lengths)
{
if ((object)elementType == null)
throw new ArgumentNullException("elementType");
if (lengths == null)
throw new ArgumentNullException("lengths");
if (lengths.Length == 0)
throw new ArgumentException(Environment.GetResourceString("Arg_NeedAtLeast1Rank"));
Contract.Ensures(Contract.Result<Array>() != null);
Contract.Ensures(Contract.Result<Array>().Rank == lengths.Length);
Contract.EndContractBlock();
RuntimeType t = elementType.UnderlyingSystemType as RuntimeType;
if (t == null)
throw new ArgumentException(Environment.GetResourceString("Arg_MustBeType"), "elementType");
// Check to make sure the lenghts are all positive. Note that we check this here to give
// a good exception message if they are not; however we check this again inside the execution
// engine's low level allocation function after having made a copy of the array to prevent a
// malicious caller from mutating the array after this check.
for (int i=0;i<lengths.Length;i++)
if (lengths[i] < 0)
throw new ArgumentOutOfRangeException("lengths["+i+']', Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum"));
fixed(int* pLengths = lengths)
return InternalCreate((void*)t.TypeHandle.Value,lengths.Length,pLengths,null);
}
public static Array CreateInstance(Type elementType, params long[] lengths)
{
if( lengths == null) {
throw new ArgumentNullException("lengths");
}
if (lengths.Length == 0)
throw new ArgumentException(Environment.GetResourceString("Arg_NeedAtLeast1Rank"));
Contract.Ensures(Contract.Result<Array>() != null);
Contract.Ensures(Contract.Result<Array>().Rank == lengths.Length);
Contract.EndContractBlock();
int[] intLengths = new int[lengths.Length];
for (int i = 0; i < lengths.Length; ++i)
{
long len = lengths[i];
if (len > Int32.MaxValue || len < Int32.MinValue)
throw new ArgumentOutOfRangeException("len", Environment.GetResourceString("ArgumentOutOfRange_HugeArrayNotSupported"));
intLengths[i] = (int) len;
}
return Array.CreateInstance(elementType, intLengths);
}
[System.Security.SecuritySafeCritical] // auto-generated
public unsafe static Array CreateInstance(Type elementType, int[] lengths,int[] lowerBounds)
{
if (elementType == null)
throw new ArgumentNullException("elementType");
if (lengths == null)
throw new ArgumentNullException("lengths");
if (lowerBounds == null)
throw new ArgumentNullException("lowerBounds");
if (lengths.Length != lowerBounds.Length)
throw new ArgumentException(Environment.GetResourceString("Arg_RanksAndBounds"));
if (lengths.Length == 0)
throw new ArgumentException(Environment.GetResourceString("Arg_NeedAtLeast1Rank"));
Contract.Ensures(Contract.Result<Array>() != null);
Contract.Ensures(Contract.Result<Array>().Rank == lengths.Length);
Contract.EndContractBlock();
RuntimeType t = elementType.UnderlyingSystemType as RuntimeType;
if (t == null)
throw new ArgumentException(Environment.GetResourceString("Arg_MustBeType"), "elementType");
// Check to make sure the lenghts are all positive. Note that we check this here to give
// a good exception message if they are not; however we check this again inside the execution
// engine's low level allocation function after having made a copy of the array to prevent a
// malicious caller from mutating the array after this check.
for (int i=0;i<lengths.Length;i++)
if (lengths[i] < 0)
throw new ArgumentOutOfRangeException("lengths["+i+']', Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum"));
fixed(int* pLengths = lengths)
fixed(int* pLowerBounds = lowerBounds)
return InternalCreate((void*)t.TypeHandle.Value,lengths.Length,pLengths,pLowerBounds);
}
[System.Security.SecurityCritical] // auto-generated
[ResourceExposure(ResourceScope.None)]
[MethodImplAttribute(MethodImplOptions.InternalCall)]
private unsafe static extern Array InternalCreate(void* elementType,int rank,int *pLengths,int *pLowerBounds);
[SecurityCritical]
#if !FEATURE_CORECLR
[PermissionSet(SecurityAction.Assert, Unrestricted = true)]
#endif
internal static Array UnsafeCreateInstance(Type elementType, int length)
{
return CreateInstance(elementType, length);
}
[SecurityCritical]
#if !FEATURE_CORECLR
[PermissionSet(SecurityAction.Assert, Unrestricted = true)]
#endif
internal static Array UnsafeCreateInstance(Type elementType, int length1, int length2)
{
return CreateInstance(elementType, length1, length2);
}
[SecurityCritical]
#if !FEATURE_CORECLR
[PermissionSet(SecurityAction.Assert, Unrestricted = true)]
#endif
internal static Array UnsafeCreateInstance(Type elementType, params int[] lengths)
{
return CreateInstance(elementType, lengths);
}
[SecurityCritical]
#if !FEATURE_CORECLR
[PermissionSet(SecurityAction.Assert, Unrestricted = true)]
#endif
internal static Array UnsafeCreateInstance(Type elementType, int[] lengths, int[] lowerBounds)
{
return CreateInstance(elementType, lengths, lowerBounds);
}
// Copies length elements from sourceArray, starting at index 0, to
// destinationArray, starting at index 0.
//
[System.Security.SecuritySafeCritical] // auto-generated
[ReliabilityContract(Consistency.MayCorruptInstance, Cer.MayFail)]
public static void Copy(Array sourceArray, Array destinationArray, int length)
{
if (sourceArray == null)
throw new ArgumentNullException("sourceArray");
if (destinationArray == null)
throw new ArgumentNullException("destinationArray");
/*
Contract.Requires(sourceArray.Rank == destinationArray.Rank);
Contract.Requires(length >= 0);
Contract.Requires(length <= sourceArray.GetLowerBound(0) + sourceArray.Length);
Contract.Requires(length <= destinationArray.GetLowerBound(0) + destinationArray.Length);
*/
Contract.EndContractBlock();
Copy(sourceArray, sourceArray.GetLowerBound(0), destinationArray, destinationArray.GetLowerBound(0), length, false);
}
// Copies length elements from sourceArray, starting at sourceIndex, to
// destinationArray, starting at destinationIndex.
//
[System.Security.SecuritySafeCritical] // auto-generated
[ReliabilityContract(Consistency.MayCorruptInstance, Cer.MayFail)]
public static void Copy(Array sourceArray, int sourceIndex, Array destinationArray, int destinationIndex, int length)
{
Copy(sourceArray, sourceIndex, destinationArray, destinationIndex, length, false);
}
// Reliability-wise, this method will either possibly corrupt your
// instance & might fail when called from within a CER, or if the
// reliable flag is true, it will either always succeed or always
// throw an exception with no side effects.
[System.Security.SecurityCritical] // auto-generated
[ReliabilityContract(Consistency.MayCorruptInstance, Cer.MayFail)]
[ResourceExposure(ResourceScope.None)]
[MethodImplAttribute(MethodImplOptions.InternalCall)]
internal static extern void Copy(Array sourceArray, int sourceIndex, Array destinationArray, int destinationIndex, int length, bool reliable);
// Provides a strong exception guarantee - either it succeeds, or
// it throws an exception with no side effects. The arrays must be
// compatible array types based on the array element type - this
// method does not support casting, boxing, or primitive widening.
// It will up-cast, assuming the array types are correct.
[System.Security.SecuritySafeCritical] // auto-generated
[ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
public static void ConstrainedCopy(Array sourceArray, int sourceIndex, Array destinationArray, int destinationIndex, int length)
{
Copy(sourceArray, sourceIndex, destinationArray, destinationIndex, length, true);
}
[ReliabilityContract(Consistency.MayCorruptInstance, Cer.MayFail)]
public static void Copy(Array sourceArray, Array destinationArray, long length)
{
if (length > Int32.MaxValue || length < Int32.MinValue)
throw new ArgumentOutOfRangeException("length", Environment.GetResourceString("ArgumentOutOfRange_HugeArrayNotSupported"));
Array.Copy(sourceArray, destinationArray, (int) length);
}
[ReliabilityContract(Consistency.MayCorruptInstance, Cer.MayFail)]
public static void Copy(Array sourceArray, long sourceIndex, Array destinationArray, long destinationIndex, long length)
{
if (sourceIndex > Int32.MaxValue || sourceIndex < Int32.MinValue)
throw new ArgumentOutOfRangeException("sourceIndex", Environment.GetResourceString("ArgumentOutOfRange_HugeArrayNotSupported"));
if (destinationIndex > Int32.MaxValue || destinationIndex < Int32.MinValue)
throw new ArgumentOutOfRangeException("destinationIndex", Environment.GetResourceString("ArgumentOutOfRange_HugeArrayNotSupported"));
if (length > Int32.MaxValue || length < Int32.MinValue)
throw new ArgumentOutOfRangeException("length", Environment.GetResourceString("ArgumentOutOfRange_HugeArrayNotSupported"));
Array.Copy(sourceArray, (int) sourceIndex, destinationArray, (int) destinationIndex, (int) length);
}
// Sets length elements in array to 0 (or null for Object arrays), starting
// at index.
//
[System.Security.SecuritySafeCritical] // auto-generated
[ResourceExposure(ResourceScope.None)]
[MethodImplAttribute(MethodImplOptions.InternalCall)]
[ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
public static extern void Clear(Array array, int index, int length);
// The various Get values...
[System.Security.SecuritySafeCritical] // auto-generated
public unsafe Object GetValue(params int[] indices)
{
if (indices == null)
throw new ArgumentNullException("indices");
if (Rank != indices.Length)
throw new ArgumentException(Environment.GetResourceString("Arg_RankIndices"));
Contract.EndContractBlock();
TypedReference elemref = new TypedReference();
fixed(int* pIndices = indices)
InternalGetReference(&elemref, indices.Length, pIndices);
return TypedReference.InternalToObject(&elemref);
}
[System.Security.SecuritySafeCritical] // auto-generated
public unsafe Object GetValue(int index)
{
if (Rank != 1)
throw new ArgumentException(Environment.GetResourceString("Arg_Need1DArray"));
Contract.EndContractBlock();
TypedReference elemref = new TypedReference();
InternalGetReference(&elemref, 1, &index);
return TypedReference.InternalToObject(&elemref);
}
[System.Security.SecuritySafeCritical] // auto-generated
public unsafe Object GetValue(int index1, int index2)
{
if (Rank != 2)
throw new ArgumentException(Environment.GetResourceString("Arg_Need2DArray"));
Contract.EndContractBlock();
int* pIndices = stackalloc int[2];
pIndices[0] = index1;
pIndices[1] = index2;
TypedReference elemref = new TypedReference();
InternalGetReference(&elemref, 2, pIndices);
return TypedReference.InternalToObject(&elemref);
}
[System.Security.SecuritySafeCritical] // auto-generated
public unsafe Object GetValue(int index1, int index2, int index3)
{
if (Rank != 3)
throw new ArgumentException(Environment.GetResourceString("Arg_Need3DArray"));
Contract.EndContractBlock();
int* pIndices = stackalloc int[3];
pIndices[0] = index1;
pIndices[1] = index2;
pIndices[2] = index3;
TypedReference elemref = new TypedReference();
InternalGetReference(&elemref, 3, pIndices);
return TypedReference.InternalToObject(&elemref);
}
[ComVisible(false)]
public Object GetValue(long index)
{
if (index > Int32.MaxValue || index < Int32.MinValue)
throw new ArgumentOutOfRangeException("index", Environment.GetResourceString("ArgumentOutOfRange_HugeArrayNotSupported"));
Contract.EndContractBlock();
return this.GetValue((int) index);
}
[ComVisible(false)]
public Object GetValue(long index1, long index2)
{
if (index1 > Int32.MaxValue || index1 < Int32.MinValue)
throw new ArgumentOutOfRangeException("index1", Environment.GetResourceString("ArgumentOutOfRange_HugeArrayNotSupported"));
if (index2 > Int32.MaxValue || index2 < Int32.MinValue)
throw new ArgumentOutOfRangeException("index2", Environment.GetResourceString("ArgumentOutOfRange_HugeArrayNotSupported"));
Contract.EndContractBlock();
return this.GetValue((int) index1, (int) index2);
}
[ComVisible(false)]
public Object GetValue(long index1, long index2, long index3)
{
if (index1 > Int32.MaxValue || index1 < Int32.MinValue)
throw new ArgumentOutOfRangeException("index1", Environment.GetResourceString("ArgumentOutOfRange_HugeArrayNotSupported"));
if (index2 > Int32.MaxValue || index2 < Int32.MinValue)
throw new ArgumentOutOfRangeException("index2", Environment.GetResourceString("ArgumentOutOfRange_HugeArrayNotSupported"));
if (index3 > Int32.MaxValue || index3 < Int32.MinValue)
throw new ArgumentOutOfRangeException("index3", Environment.GetResourceString("ArgumentOutOfRange_HugeArrayNotSupported"));
Contract.EndContractBlock();
return this.GetValue((int) index1, (int) index2, (int) index3);
}
[ComVisible(false)]
public Object GetValue(params long[] indices)
{
if (indices == null)
throw new ArgumentNullException("indices");
if (Rank != indices.Length)
throw new ArgumentException(Environment.GetResourceString("Arg_RankIndices"));
Contract.EndContractBlock();
int[] intIndices = new int[indices.Length];
for (int i = 0; i < indices.Length; ++i)
{
long index = indices[i];
if (index > Int32.MaxValue || index < Int32.MinValue)
throw new ArgumentOutOfRangeException("index", Environment.GetResourceString("ArgumentOutOfRange_HugeArrayNotSupported"));
intIndices[i] = (int) index;
}
return this.GetValue(intIndices);
}
[System.Security.SecuritySafeCritical] // auto-generated
public unsafe void SetValue(Object value,int index)
{
if (Rank != 1)
throw new ArgumentException(Environment.GetResourceString("Arg_Need1DArray"));
Contract.EndContractBlock();
TypedReference elemref = new TypedReference();
InternalGetReference(&elemref, 1, &index);
InternalSetValue(&elemref,value);
}
[System.Security.SecuritySafeCritical] // auto-generated
public unsafe void SetValue(Object value,int index1, int index2)
{
if (Rank != 2)
throw new ArgumentException(Environment.GetResourceString("Arg_Need2DArray"));
Contract.EndContractBlock();
int* pIndices = stackalloc int[2];
pIndices[0] = index1;
pIndices[1] = index2;
TypedReference elemref = new TypedReference();
InternalGetReference(&elemref, 2, pIndices);
InternalSetValue(&elemref,value);
}
[System.Security.SecuritySafeCritical] // auto-generated
public unsafe void SetValue(Object value,int index1, int index2, int index3)
{
if (Rank != 3)
throw new ArgumentException(Environment.GetResourceString("Arg_Need3DArray"));
Contract.EndContractBlock();
int* pIndices = stackalloc int[3];
pIndices[0] = index1;
pIndices[1] = index2;
pIndices[2] = index3;
TypedReference elemref = new TypedReference();
InternalGetReference(&elemref, 3, pIndices);
InternalSetValue(&elemref,value);
}
[System.Security.SecuritySafeCritical] // auto-generated
public unsafe void SetValue(Object value,params int[] indices)
{
if (indices == null)
throw new ArgumentNullException("indices");
if (Rank != indices.Length)
throw new ArgumentException(Environment.GetResourceString("Arg_RankIndices"));
Contract.EndContractBlock();
TypedReference elemref = new TypedReference();
fixed(int* pIndices = indices)
InternalGetReference(&elemref, indices.Length, pIndices);
InternalSetValue(&elemref,value);
}
[ComVisible(false)]
public void SetValue(Object value, long index)
{
if (index > Int32.MaxValue || index < Int32.MinValue)
throw new ArgumentOutOfRangeException("index", Environment.GetResourceString("ArgumentOutOfRange_HugeArrayNotSupported"));
Contract.EndContractBlock();
this.SetValue(value, (int) index);
}
[ComVisible(false)]
public void SetValue(Object value, long index1, long index2)
{
if (index1 > Int32.MaxValue || index1 < Int32.MinValue)
throw new ArgumentOutOfRangeException("index1", Environment.GetResourceString("ArgumentOutOfRange_HugeArrayNotSupported"));
if (index2 > Int32.MaxValue || index2 < Int32.MinValue)
throw new ArgumentOutOfRangeException("index2", Environment.GetResourceString("ArgumentOutOfRange_HugeArrayNotSupported"));
Contract.EndContractBlock();
this.SetValue(value, (int) index1, (int) index2);
}
[ComVisible(false)]
public void SetValue(Object value, long index1, long index2, long index3)
{
if (index1 > Int32.MaxValue || index1 < Int32.MinValue)
throw new ArgumentOutOfRangeException("index1", Environment.GetResourceString("ArgumentOutOfRange_HugeArrayNotSupported"));
if (index2 > Int32.MaxValue || index2 < Int32.MinValue)
throw new ArgumentOutOfRangeException("index2", Environment.GetResourceString("ArgumentOutOfRange_HugeArrayNotSupported"));
if (index3 > Int32.MaxValue || index3 < Int32.MinValue)
throw new ArgumentOutOfRangeException("index3", Environment.GetResourceString("ArgumentOutOfRange_HugeArrayNotSupported"));
Contract.EndContractBlock();
this.SetValue(value, (int) index1, (int) index2, (int) index3);
}
[ComVisible(false)]
public void SetValue(Object value, params long[] indices)
{
if (indices == null)
throw new ArgumentNullException("indices");
if (Rank != indices.Length)
throw new ArgumentException(Environment.GetResourceString("Arg_RankIndices"));
Contract.EndContractBlock();
int[] intIndices = new int[indices.Length];
for (int i = 0; i < indices.Length; ++i)
{
long index = indices[i];
if (index > Int32.MaxValue || index < Int32.MinValue)
throw new ArgumentOutOfRangeException("index", Environment.GetResourceString("ArgumentOutOfRange_HugeArrayNotSupported"));
intIndices[i] = (int) index;
}
this.SetValue(value, intIndices);
}
[System.Security.SecurityCritical] // auto-generated
[ResourceExposure(ResourceScope.None)]
[MethodImplAttribute(MethodImplOptions.InternalCall)]
// reference to TypedReference is banned, so have to pass result as pointer
private unsafe extern void InternalGetReference(void * elemRef, int rank, int * pIndices);
// Ideally, we would like to use TypedReference.SetValue instead. Unfortunately, TypedReference.SetValue
// always throws not-supported exception
[System.Security.SecurityCritical] // auto-generated
[ResourceExposure(ResourceScope.None)]
[MethodImplAttribute(MethodImplOptions.InternalCall)]
private unsafe extern static void InternalSetValue(void * target, Object value);
public extern int Length {
[Pure]
[System.Security.SecuritySafeCritical] // auto-generated
[ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
[ResourceExposure(ResourceScope.None)]
[MethodImpl(MethodImplOptions.InternalCall)]
get;
}
[ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
private static int GetMedian(int low, int hi) {
// Note both may be negative, if we are dealing with arrays w/ negative lower bounds.
Contract.Requires(low <= hi);
Contract.Assert( hi - low >= 0, "Length overflow!");
return low + ((hi - low) >> 1);
}
// We impose limits on maximum array lenght in each dimension to allow efficient
// implementation of advanced range check elimination in future.
// Keep in sync with vm\gcscan.cpp and HashHelpers.MaxPrimeArrayLength.
// The constants are defined in this method: inline SIZE_T MaxArrayLength(SIZE_T componentSize) from gcscan
// We have different max sizes for arrays with elements of size 1 for backwards compatibility
internal const int MaxArrayLength = 0X7FEFFFFF;
internal const int MaxByteArrayLength = 0x7FFFFFC7;
[ComVisible(false)]
public extern long LongLength {
[Pure]
[System.Security.SecuritySafeCritical] // auto-generated
[ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
[ResourceExposure(ResourceScope.None)]
[MethodImpl(MethodImplOptions.InternalCall)]
get;
}
[Pure]
[System.Security.SecuritySafeCritical] // auto-generated
[ResourceExposure(ResourceScope.None)]
[MethodImplAttribute(MethodImplOptions.InternalCall)]
public extern int GetLength(int dimension);
[Pure]
[ComVisible(false)]
public long GetLongLength(int dimension) {
//This method should throw an IndexOufOfRangeException for compat if dimension < 0 or >= Rank
return GetLength(dimension);
}
public extern int Rank {
[Pure]
[System.Security.SecuritySafeCritical] // auto-generated
[ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
[ResourceExposure(ResourceScope.None)]
[MethodImplAttribute(MethodImplOptions.InternalCall)]
get;
}
[System.Security.SecuritySafeCritical] // auto-generated
[Pure]
[ResourceExposure(ResourceScope.None)]
[MethodImplAttribute(MethodImplOptions.InternalCall)]
[ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
public extern int GetUpperBound(int dimension);
[System.Security.SecuritySafeCritical] // auto-generated
[Pure]
[ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
[ResourceExposure(ResourceScope.None)]
[MethodImplAttribute(MethodImplOptions.InternalCall)]
public extern int GetLowerBound(int dimension);
[System.Security.SecurityCritical] // auto-generated
[ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
[ResourceExposure(ResourceScope.None)]
[MethodImplAttribute(MethodImplOptions.InternalCall)]
internal extern int GetDataPtrOffsetInternal();
// Number of elements in the Array.
int ICollection.Count
{ get { return Length; } }
// Returns an object appropriate for synchronizing access to this
// Array.
public Object SyncRoot
{ get { return this; } }
// Is this Array read-only?
public bool IsReadOnly
{ get { return false; } }
public bool IsFixedSize {
get { return true; }
}
// Is this Array synchronized (i.e., thread-safe)? If you want a synchronized
// collection, you can use SyncRoot as an object to synchronize your
// collection with. You could also call GetSynchronized()
// to get a synchronized wrapper around the Array.
public bool IsSynchronized
{ get { return false; } }
Object IList.this[int index] {
get { return GetValue(index); }
set { SetValue(value, index); }
}
int IList.Add(Object value)
{
throw new NotSupportedException(Environment.GetResourceString("NotSupported_FixedSizeCollection"));
}
bool IList.Contains(Object value)
{
return Array.IndexOf(this, value) >= this.GetLowerBound(0);
}
void IList.Clear()
{
Array.Clear(this, this.GetLowerBound(0), this.Length);
}
int IList.IndexOf(Object value)
{
return Array.IndexOf(this, value);
}
void IList.Insert(int index, Object value)
{
throw new NotSupportedException(Environment.GetResourceString("NotSupported_FixedSizeCollection"));
}
void IList.Remove(Object value)
{
throw new NotSupportedException(Environment.GetResourceString("NotSupported_FixedSizeCollection"));
}
void IList.RemoveAt(int index)
{
throw new NotSupportedException(Environment.GetResourceString("NotSupported_FixedSizeCollection"));
}
// Make a new array which is a shallow copy of the original array.
//
public Object Clone()
{
return MemberwiseClone();
}
Int32 IStructuralComparable.CompareTo(Object other, IComparer comparer) {
if (other == null) {
return 1;
}
Array o = other as Array;
if (o == null || this.Length != o.Length) {
throw new ArgumentException(Environment.GetResourceString("ArgumentException_OtherNotArrayOfCorrectLength"), "other");
}
int i = 0;
int c = 0;
while (i < o.Length && c == 0) {
object left = GetValue(i);
object right = o.GetValue(i);
c = comparer.Compare(left, right);
i++;
}
return c;
}
Boolean IStructuralEquatable.Equals(Object other, IEqualityComparer comparer) {
if (other == null) {
return false;
}
if (Object.ReferenceEquals(this, other)) {
return true;
}
Array o = other as Array;
if (o == null || o.Length != this.Length) {
return false;
}
int i = 0;
while (i < o.Length) {
object left = GetValue(i);
object right = o.GetValue(i);
if (!comparer.Equals(left, right)) {
return false;
}
i++;
}
return true;
}
// From System.Web.Util.HashCodeCombiner
internal static int CombineHashCodes(int h1, int h2) {
return (((h1 << 5) + h1) ^ h2);
}
int IStructuralEquatable.GetHashCode(IEqualityComparer comparer) {
if (comparer == null)
throw new ArgumentNullException("comparer");
Contract.EndContractBlock();
int ret = 0;
for (int i = (this.Length >= 8 ? this.Length - 8 : 0); i < this.Length; i++) {
ret = CombineHashCodes(ret, comparer.GetHashCode(GetValue(i)));
}
return ret;
}
// Searches an array for a given element using a binary search algorithm.
// Elements of the array are compared to the search value using the
// IComparable interface, which must be implemented by all elements
// of the array and the given search value. This method assumes that the
// array is already sorted according to the IComparable interface;
// if this is not the case, the result will be incorrect.
//
// The method returns the index of the given value in the array. If the
// array does not contain the given value, the method returns a negative
// integer. The bitwise complement operator (~) can be applied to a
// negative result to produce the index of the first element (if any) that
// is larger than the given search value.
//
[Pure]
[ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)]
public static int BinarySearch(Array array, Object value) {
if (array==null)
throw new ArgumentNullException("array");
Contract.Ensures((Contract.Result<int>() >= array.GetLowerBound(0) && Contract.Result<int>() <= array.GetUpperBound(0)) || (Contract.Result<int>() < array.GetLowerBound(0) && ~Contract.Result<int>() <= array.GetUpperBound(0) + 1));
Contract.EndContractBlock();
int lb = array.GetLowerBound(0);
return BinarySearch(array, lb, array.Length, value, null);
}
// Searches a section of an array for a given element using a binary search
// algorithm. Elements of the array are compared to the search value using
// the IComparable interface, which must be implemented by all
// elements of the array and the given search value. This method assumes
// that the array is already sorted according to the IComparable
// interface; if this is not the case, the result will be incorrect.
//
// The method returns the index of the given value in the array. If the
// array does not contain the given value, the method returns a negative
// integer. The bitwise complement operator (~) can be applied to a
// negative result to produce the index of the first element (if any) that
// is larger than the given search value.
//
[Pure]
[ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)]
public static int BinarySearch(Array array, int index, int length, Object value) {
return BinarySearch(array, index, length, value, null);
}
// Searches an array for a given element using a binary search algorithm.
// Elements of the array are compared to the search value using the given
// IComparer interface. If comparer is null, elements of the
// array are compared to the search value using the IComparable
// interface, which in that case must be implemented by all elements of the
// array and the given search value. This method assumes that the array is
// already sorted; if this is not the case, the result will be incorrect.
//
// The method returns the index of the given value in the array. If the
// array does not contain the given value, the method returns a negative
// integer. The bitwise complement operator (~) can be applied to a
// negative result to produce the index of the first element (if any) that
// is larger than the given search value.
//
[Pure]
[ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)]
public static int BinarySearch(Array array, Object value, IComparer comparer) {
if (array==null)
throw new ArgumentNullException("array");
Contract.EndContractBlock();
int lb = array.GetLowerBound(0);
return BinarySearch(array, lb, array.Length, value, comparer);
}
// Searches a section of an array for a given element using a binary search
// algorithm. Elements of the array are compared to the search value using
// the given IComparer interface. If comparer is null,
// elements of the array are compared to the search value using the
// IComparable interface, which in that case must be implemented by
// all elements of the array and the given search value. This method
// assumes that the array is already sorted; if this is not the case, the
// result will be incorrect.
//
// The method returns the index of the given value in the array. If the
// array does not contain the given value, the method returns a negative
// integer. The bitwise complement operator (~) can be applied to a
// negative result to produce the index of the first element (if any) that
// is larger than the given search value.
//
[Pure]
[System.Security.SecuritySafeCritical] // auto-generated
[ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)]
public static int BinarySearch(Array array, int index, int length, Object value, IComparer comparer) {
if (array==null)
throw new ArgumentNullException("array");
Contract.EndContractBlock();
int lb = array.GetLowerBound(0);
if (index < lb || length < 0)
throw new ArgumentOutOfRangeException((index<lb ? "index" : "length"), Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum"));
if (array.Length - (index - lb) < length)
throw new ArgumentException(Environment.GetResourceString("Argument_InvalidOffLen"));
if (array.Rank != 1)
throw new RankException(Environment.GetResourceString("Rank_MultiDimNotSupported"));
if (comparer == null) comparer = Comparer.Default;
if (comparer == Comparer.Default) {
int retval;
bool r = TrySZBinarySearch(array, index, length, value, out retval);
if (r)
return retval;
}
int lo = index;
int hi = index + length - 1;
Object[] objArray = array as Object[];
if(objArray != null) {
while (lo <= hi) {
// i might overflow if lo and hi are both large positive numbers.
int i = GetMedian(lo, hi);
int c;
try {
c = comparer.Compare(objArray[i], value);
}
catch (Exception e) {
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_IComparerFailed"), e);
}
if (c == 0) return i;
if (c < 0) {
lo = i + 1;
}
else {
hi = i - 1;
}
}
}
else {
while (lo <= hi) {
int i = GetMedian(lo, hi);
int c;
try {
c = comparer.Compare(array.GetValue(i), value);
}
catch (Exception e) {
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_IComparerFailed"), e);
}
if (c == 0) return i;
if (c < 0) {
lo = i + 1;
}
else {
hi = i - 1;
}
}
}
return ~lo;
}
[System.Security.SecurityCritical] // auto-generated
[ResourceExposure(ResourceScope.None)]
[MethodImplAttribute(MethodImplOptions.InternalCall)]
[ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)]
private static extern bool TrySZBinarySearch(Array sourceArray, int sourceIndex, int count, Object value, out int retVal);
#if ARRAY_GENERIC_METHODS
[Pure]
[ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)]
public static int BinarySearch<T>(T[] array, T value) {
if (array==null)
throw new ArgumentNullException("array");
Contract.EndContractBlock();
return BinarySearch<T>(array, 0, array.Length, value, null);
}
[Pure]
[ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)]
public static int BinarySearch<T>(T[] array, T value, System.Collections.Generic.IComparer<T> comparer) {
if (array==null)
throw new ArgumentNullException("array");
Contract.EndContractBlock();
return BinarySearch<T>(array, 0, array.Length, value, comparer);