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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);
}
[Pure]
[ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)]
public static int BinarySearch<T>(T[] array, int index, int length, T value) {
return BinarySearch<T>(array, index, length, value, null);
}
[Pure]
[ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)]
public static int BinarySearch<T>(T[] array, int index, int length, T value, System.Collections.Generic.IComparer<T> comparer) {
if (array==null)
throw new ArgumentNullException("array");
if (index < 0 || length < 0)
throw new ArgumentOutOfRangeException((index<0 ? "index" : "length"), Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum"));
if (array.Length - index < length)
throw new ArgumentException(Environment.GetResourceString("Argument_InvalidOffLen"));
Contract.EndContractBlock();
#if FEATURE_LEGACYNETCF
if (CompatibilitySwitches.IsAppEarlierThanWindowsPhone8)
return MangoArraySortHelper<T>.Default.BinarySearch(array, index, length, value, comparer);
else
return ArraySortHelper<T>.Default.BinarySearch(array, index, length, value, comparer);
#else
return ArraySortHelper<T>.Default.BinarySearch(array, index, length, value, comparer);
#endif
}
#endif
public static TOutput[] ConvertAll<TInput, TOutput>(TInput[] array, Converter<TInput,TOutput> converter) {
if( array == null) {
throw new ArgumentNullException("array");
}
if( converter == null) {
throw new ArgumentNullException("converter");
}
Contract.Ensures(Contract.Result<TOutput[]>() != null);
Contract.Ensures(Contract.Result<TOutput[]>().Length == array.Length);
Contract.EndContractBlock();
TOutput[] newArray = new TOutput[array.Length];
for( int i = 0; i< array.Length; i++) {
newArray[i] = converter(array[i]);
}
return newArray;
}
// CopyTo copies a collection into an Array, starting at a particular
// index into the array.
//
// This method is to support the ICollection interface, and calls
// Array.Copy internally. If you aren't using ICollection explicitly,
// call Array.Copy to avoid an extra indirection.
//
[Pure]
public void CopyTo(Array array, int index)
{
if (array != null && array.Rank != 1)
throw new ArgumentException(Environment.GetResourceString("Arg_RankMultiDimNotSupported"));
Contract.EndContractBlock();
// Note: Array.Copy throws a RankException and we want a consistent ArgumentException for all the IList CopyTo methods.
Array.Copy(this, GetLowerBound(0), array, index, Length);
}
[Pure]
[ComVisible(false)]
public void CopyTo(Array array, long index)
{
if (index > Int32.MaxValue || index < Int32.MinValue)
throw new ArgumentOutOfRangeException("index", Environment.GetResourceString("ArgumentOutOfRange_HugeArrayNotSupported"));
Contract.EndContractBlock();
this.CopyTo(array, (int) index);
}
[Pure]
[ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)]
public static T[] Empty<T>()
{
Contract.Ensures(Contract.Result<T[]>() != null);
Contract.Ensures(Contract.Result<T[]>().Length == 0);
Contract.EndContractBlock();
return EmptyArray<T>.Value;
}
public static bool Exists<T>(T[] array, Predicate<T> match) {
return Array.FindIndex(array, match) != -1;
}
public static T Find<T>(T[] array, Predicate<T> match) {
if( array == null) {
throw new ArgumentNullException("array");
}
if( match == null) {
throw new ArgumentNullException("match");
}
Contract.EndContractBlock();
for(int i = 0 ; i < array.Length; i++) {
if(match(array[i])) {
return array[i];
}
}
return default(T);
}
public static T[] FindAll<T>(T[] array, Predicate<T> match) {
if( array == null) {
throw new ArgumentNullException("array");
}
if( match == null) {
throw new ArgumentNullException("match");
}
Contract.EndContractBlock();
List<T> list = new List<T>();
for(int i = 0 ; i < array.Length; i++) {
if(match(array[i])) {
list.Add(array[i]);
}
}
return list.ToArray();
}
public static int FindIndex<T>(T[] array, Predicate<T> match) {
if (array==null) {
throw new ArgumentNullException("array");
}
Contract.Ensures(Contract.Result<int>() < array.Length);
Contract.EndContractBlock();
return FindIndex(array, 0, array.Length, match);
}
public static int FindIndex<T>(T[] array, int startIndex, Predicate<T> match) {
if (array==null) {
throw new ArgumentNullException("array");
}
Contract.Ensures(Contract.Result<int>() < array.Length);
Contract.EndContractBlock();
return FindIndex(array, startIndex, array.Length - startIndex, match);
}
public static int FindIndex<T>(T[] array, int startIndex, int count, Predicate<T> match) {
if (array==null) {
throw new ArgumentNullException("array");
}
if( startIndex < 0 || startIndex > array.Length ) {
throw new ArgumentOutOfRangeException("startIndex", Environment.GetResourceString("ArgumentOutOfRange_Index"));
}
if (count < 0 || startIndex > array.Length - count) {
throw new ArgumentOutOfRangeException("count", Environment.GetResourceString("ArgumentOutOfRange_Count"));
}
if( match == null) {
throw new ArgumentNullException("match");
}
Contract.Ensures(Contract.Result<int>() < array.Length);
Contract.EndContractBlock();
int endIndex = startIndex + count;
for( int i = startIndex; i < endIndex; i++) {
if( match(array[i])) return i;
}
return -1;
}
public static T FindLast<T>(T[] array, Predicate<T> match) {
if( array == null) {
throw new ArgumentNullException("array");
}
if( match == null) {
throw new ArgumentNullException("match");
}
Contract.EndContractBlock();
for(int i = array.Length - 1 ; i >= 0; i--) {
if(match(array[i])) {
return array[i];
}
}
return default(T);
}
public static int FindLastIndex<T>(T[] array, Predicate<T> match) {
if( array == null) {
throw new ArgumentNullException("array");
}
Contract.EndContractBlock();
return FindLastIndex(array, array.Length - 1, array.Length, match);
}
public static int FindLastIndex<T>(T[] array, int startIndex, Predicate<T> match) {
if( array == null) {
throw new ArgumentNullException("array");
}
Contract.EndContractBlock();
return FindLastIndex(array, startIndex, startIndex + 1, match);
}
public static int FindLastIndex<T>(T[] array, int startIndex, int count, Predicate<T> match) {
if( array == null) {
throw new ArgumentNullException("array");
}
if( match == null) {
throw new ArgumentNullException("match");
}
Contract.EndContractBlock();
if(array.Length == 0) {
// Special case for 0 length List
if( startIndex != -1) {
throw new ArgumentOutOfRangeException("startIndex", Environment.GetResourceString("ArgumentOutOfRange_Index"));
}
}
else {
// Make sure we're not out of range
if ( startIndex < 0 || startIndex >= array.Length) {
throw new ArgumentOutOfRangeException("startIndex", Environment.GetResourceString("ArgumentOutOfRange_Index"));
}
}
// 2nd have of this also catches when startIndex == MAXINT, so MAXINT - 0 + 1 == -1, which is < 0.
if (count < 0 || startIndex - count + 1 < 0) {
throw new ArgumentOutOfRangeException("count", Environment.GetResourceString("ArgumentOutOfRange_Count"));
}
int endIndex = startIndex - count;
for( int i = startIndex; i > endIndex; i--) {
if( match(array[i])) {
return i;
}
}
return -1;
}
public static void ForEach<T>(T[] array, Action<T> action) {
if( array == null) {
throw new ArgumentNullException("array");
}
if( action == null) {
throw new ArgumentNullException("action");
}
Contract.EndContractBlock();
for(int i = 0 ; i < array.Length; i++) {
action(array[i]);
}
}
// GetEnumerator returns an IEnumerator over this Array.
//
// Currently, only one dimensional arrays are supported.
//
public IEnumerator GetEnumerator()
{
int lowerBound = GetLowerBound(0);
if (Rank == 1 && lowerBound == 0)
return new SZArrayEnumerator(this);
else
return new ArrayEnumerator(this, lowerBound, Length);
}
// Returns the index of the first occurrence of a given value in an array.
// The array is searched forwards, and the elements of the array are
// compared to the given value using the Object.Equals method.
//
[ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)]
public static int IndexOf(Array array, Object value) {
if (array==null)
throw new ArgumentNullException("array");
Contract.Ensures(Contract.Result<int>() < array.GetLowerBound(0) + array.Length);
Contract.EndContractBlock();
int lb = array.GetLowerBound(0);
return IndexOf(array, value, lb, array.Length);
}
// Returns the index of the first occurrence of a given value in a range of
// an array. The array is searched forwards, starting at index
// startIndex and ending at the last element of the array. The
// elements of the array are compared to the given value using the
// Object.Equals method.
//
[ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)]
public static int IndexOf(Array array, Object value, int startIndex) {
if (array==null)
throw new ArgumentNullException("array");
Contract.Ensures(Contract.Result<int>() < array.GetLowerBound(0) + array.Length);
Contract.EndContractBlock();
int lb = array.GetLowerBound(0);
return IndexOf(array, value, startIndex, array.Length - startIndex + lb);
}
// Returns the index of the first occurrence of a given value in a range of
// an array. The array is searched forwards, starting at index
// startIndex and upto count elements. The
// elements of the array are compared to the given value using the
// Object.Equals method.
//
[System.Security.SecuritySafeCritical] // auto-generated
[ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)]
public static int IndexOf(Array array, Object value, int startIndex, int count) {
if (array==null)
throw new ArgumentNullException("array");
if (array.Rank != 1)
throw new RankException(Environment.GetResourceString("Rank_MultiDimNotSupported"));
Contract.Ensures(Contract.Result<int>() < array.GetLowerBound(0) + array.Length);
Contract.EndContractBlock();
int lb = array.GetLowerBound(0);
if (startIndex < lb || startIndex > array.Length + lb)
throw new ArgumentOutOfRangeException("startIndex", Environment.GetResourceString("ArgumentOutOfRange_Index"));
if (count < 0 || count > array.Length - startIndex + lb)
throw new ArgumentOutOfRangeException("count", Environment.GetResourceString("ArgumentOutOfRange_Count"));
// Try calling a quick native method to handle primitive types.
int retVal;
bool r = TrySZIndexOf(array, startIndex, count, value, out retVal);
if (r)
return retVal;
Object[] objArray = array as Object[];
int endIndex = startIndex + count;
if (objArray != null) {
if (value == null) {
for (int i = startIndex; i < endIndex; i++) {
if (objArray[i] == null) return i;
}
}
else {
for (int i = startIndex; i < endIndex; i++) {
Object obj = objArray[i];
if (obj != null && obj.Equals(value)) return i;
}
}
}
else {
for (int i = startIndex; i < endIndex; i++) {
Object obj = array.GetValue(i);
if( obj == null) {
if(value == null) return i;
}
else {
if( obj.Equals(value)) return i;
}
}
}
// Return one less than the lower bound of the array. This way,
// for arrays with a lower bound of -1 we will not return -1 when the
// item was not found. And for SZArrays (the vast majority), -1 still
// works for them.
return lb-1;
}
#if ARRAY_GENERIC_METHODS
[Pure]
public static int IndexOf<T>(T[] array, T value) {
if (array==null) {
throw new ArgumentNullException("array");
}
Contract.Ensures((Contract.Result<int>() < 0) ||
(Contract.Result<int>() >= 0 && Contract.Result<int>() < array.Length && EqualityComparer<T>.Default.Equals(value, array[Contract.Result<int>()])));
Contract.EndContractBlock();
return IndexOf(array, value, 0, array.Length);
}
public static int IndexOf<T>(T[] array, T value, int startIndex) {
if (array==null) {
throw new ArgumentNullException("array");
}
Contract.Ensures(Contract.Result<int>() < array.Length);
Contract.EndContractBlock();
return IndexOf(array, value, startIndex, array.Length - startIndex);
}
public static int IndexOf<T>(T[] array, T value, int startIndex, int count) {
if (array==null) {
throw new ArgumentNullException("array");
}
if (startIndex < 0 || startIndex > array.Length ) {
throw new ArgumentOutOfRangeException("startIndex", Environment.GetResourceString("ArgumentOutOfRange_Index"));
}
if (count < 0 || count > array.Length - startIndex) {
throw new ArgumentOutOfRangeException("count", Environment.GetResourceString("ArgumentOutOfRange_Count"));
}
Contract.Ensures(Contract.Result<int>() < array.Length);
Contract.EndContractBlock();
return EqualityComparer<T>.Default.IndexOf(array, value, startIndex, count);
}
#endif
[System.Security.SecurityCritical] // auto-generated
[ResourceExposure(ResourceScope.None)]
[MethodImplAttribute(MethodImplOptions.InternalCall)]
[ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)]
private static extern bool TrySZIndexOf(Array sourceArray, int sourceIndex, int count, Object value, out int retVal);
// Returns the index of the last occurrence of a given value in an array.
// The array is searched backwards, and the elements of the array are
// compared to the given value using the Object.Equals method.
//
[ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)]
public static int LastIndexOf(Array array, Object value) {
if (array==null)
throw new ArgumentNullException("array");
Contract.Ensures(Contract.Result<int>() < array.GetLowerBound(0) + array.Length);
Contract.EndContractBlock();
int lb = array.GetLowerBound(0);
return LastIndexOf(array, value, array.Length - 1 + lb, array.Length);
}
// Returns the index of the last occurrence of a given value in a range of
// an array. The array is searched backwards, starting at index
// startIndex and ending at index 0. The elements of the array are
// compared to the given value using the Object.Equals method.
//
[ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)]
public static int LastIndexOf(Array array, Object value, int startIndex) {
if (array == null)
throw new ArgumentNullException("array");
Contract.Ensures(Contract.Result<int>() < array.GetLowerBound(0) + array.Length);
Contract.EndContractBlock();
int lb = array.GetLowerBound(0);
return LastIndexOf(array, value, startIndex, startIndex + 1 - lb);
}
// Returns the index of the last occurrence of a given value in a range of
// an array. The array is searched backwards, starting at index
// startIndex and counting uptocount elements. The elements of
// the array are compared to the given value using the Object.Equals
// method.
//
[System.Security.SecuritySafeCritical] // auto-generated
[ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)]
public static int LastIndexOf(Array array, Object value, int startIndex, int count) {
if (array==null)
throw new ArgumentNullException("array");
Contract.Ensures(Contract.Result<int>() < array.GetLowerBound(0) + array.Length);
Contract.EndContractBlock();
int lb = array.GetLowerBound(0);
if (array.Length == 0) {
return lb-1;
}
if (startIndex < lb || startIndex >= array.Length + lb)
throw new ArgumentOutOfRangeException("startIndex", Environment.GetResourceString("ArgumentOutOfRange_Index"));
if (count < 0)
throw new ArgumentOutOfRangeException("count", Environment.GetResourceString("ArgumentOutOfRange_Count"));
if (count > startIndex - lb + 1)
throw new ArgumentOutOfRangeException("endIndex", Environment.GetResourceString("ArgumentOutOfRange_EndIndexStartIndex"));
if (array.Rank != 1)
throw new RankException(Environment.GetResourceString("Rank_MultiDimNotSupported"));
// Try calling a quick native method to handle primitive types.
int retVal;
bool r = TrySZLastIndexOf(array, startIndex, count, value, out retVal);
if (r)
return retVal;
Object[] objArray = array as Object[];
int endIndex = startIndex - count + 1;
if (objArray!=null) {
if (value == null) {
for (int i = startIndex; i >= endIndex; i--) {
if (objArray[i] == null) return i;
}
}
else {
for (int i = startIndex; i >= endIndex; i--) {
Object obj = objArray[i];
if (obj != null && obj.Equals(value)) return i;
}
}
}
else {
for (int i = startIndex; i >= endIndex; i--) {
Object obj = array.GetValue(i);
if( obj == null) {
if(value == null) return i;
}
else {
if( obj.Equals(value)) return i;
}
}
}
return lb-1; // Return lb-1 for arrays with negative lower bounds.
}
#if ARRAY_GENERIC_METHODS
public static int LastIndexOf<T>(T[] array, T value) {
if (array==null) {
throw new ArgumentNullException("array");
}
Contract.Ensures(Contract.Result<int>() < array.Length);
Contract.EndContractBlock();
return LastIndexOf(array, value, array.Length - 1, array.Length);
}
public static int LastIndexOf<T>(T[] array, T value, int startIndex) {
if (array==null) {
throw new ArgumentNullException("array");
}
Contract.Ensures(Contract.Result<int>() < array.Length);
Contract.EndContractBlock();
// if array is empty and startIndex is 0, we need to pass 0 as count
return LastIndexOf(array, value, startIndex, (array.Length == 0)? 0 : (startIndex + 1));
}
public static int LastIndexOf<T>(T[] array, T value, int startIndex, int count) {
if (array==null) {
throw new ArgumentNullException("array");
}
Contract.Ensures(Contract.Result<int>() < array.Length);
Contract.EndContractBlock();
if(array.Length == 0) {
//
// Special case for 0 length List
// accept -1 and 0 as valid startIndex for compablility reason.
//
if( startIndex != -1 && startIndex != 0) {
throw new ArgumentOutOfRangeException("startIndex", Environment.GetResourceString("ArgumentOutOfRange_Index"));
}
// only 0 is a valid value for count if array is empty
if( count != 0) {
throw new ArgumentOutOfRangeException("count", Environment.GetResourceString("ArgumentOutOfRange_Count"));
}
return -1;
}
// Make sure we're not out of range
if ( startIndex < 0 || startIndex >= array.Length) {
throw new ArgumentOutOfRangeException("startIndex", Environment.GetResourceString("ArgumentOutOfRange_Index"));
}
// 2nd have of this also catches when startIndex == MAXINT, so MAXINT - 0 + 1 == -1, which is < 0.
if (count < 0 || startIndex - count + 1 < 0) {
throw new ArgumentOutOfRangeException("count", Environment.GetResourceString("ArgumentOutOfRange_Count"));
}
return EqualityComparer<T>.Default.LastIndexOf(array, value, startIndex, count);
}
#endif
[System.Security.SecurityCritical] // auto-generated
[ResourceExposure(ResourceScope.None)]
[MethodImplAttribute(MethodImplOptions.InternalCall)]
[ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)]
private static extern bool TrySZLastIndexOf(Array sourceArray, int sourceIndex, int count, Object value, out int retVal);
// Reverses all elements of the given array. Following a call to this
// method, an element previously located at index i will now be
// located at index length - i - 1, where length is the
// length of the array.
//
[ReliabilityContract(Consistency.MayCorruptInstance, Cer.MayFail)]
public static void Reverse(Array array) {
if (array==null)
throw new ArgumentNullException("array");
Contract.EndContractBlock();
Reverse(array, array.GetLowerBound(0), array.Length);
}
// Reverses the elements in a range of an array. Following a call to this
// method, an element in the range given by index and count
// which was previously located at index i will now be located at
// index index + (index + count - i - 1).
// Reliability note: This may fail because it may have to box objects.
//
[System.Security.SecuritySafeCritical] // auto-generated
[ReliabilityContract(Consistency.MayCorruptInstance, Cer.MayFail)]
public static void Reverse(Array array, int index, int length) {
if (array==null)
throw new ArgumentNullException("array");
if (index < array.GetLowerBound(0) || length < 0)
throw new ArgumentOutOfRangeException((index<0 ? "index" : "length"), Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum"));
if (array.Length - (index - array.GetLowerBound(0)) < length)
throw new ArgumentException(Environment.GetResourceString("Argument_InvalidOffLen"));
if (array.Rank != 1)
throw new RankException(Environment.GetResourceString("Rank_MultiDimNotSupported"));
Contract.EndContractBlock();
bool r = TrySZReverse(array, index, length);
if (r)
return;
int i = index;
int j = index + length - 1;
Object[] objArray = array as Object[];
if (objArray!=null) {
while (i < j) {
Object temp = objArray[i];
objArray[i] = objArray[j];
objArray[j] = temp;
i++;
j--;
}
}
else {
while (i < j) {
Object temp = array.GetValue(i);
array.SetValue(array.GetValue(j), i);
array.SetValue(temp, j);
i++;
j--;
}
}
}
[System.Security.SecurityCritical] // auto-generated
[ResourceExposure(ResourceScope.None)]
[MethodImplAttribute(MethodImplOptions.InternalCall)]
[ReliabilityContract(Consistency.MayCorruptInstance, Cer.MayFail)]
private static extern bool TrySZReverse(Array array, int index, int count);
// Sorts the elements of an array. The sort compares the elements to each
// other using the IComparable interface, which must be implemented
// by all elements of the array.
//
[ReliabilityContract(Consistency.MayCorruptInstance, Cer.MayFail)]
public static void Sort(Array array) {
if (array==null)
throw new ArgumentNullException("array");
Contract.EndContractBlock();
Sort(array, null, array.GetLowerBound(0), array.Length, null);
}
// Sorts the elements of two arrays based on the keys in the first array.
// Elements in the keys array specify the sort keys for
// corresponding elements in the items array. The sort compares the
// keys to each other using the IComparable interface, which must be
// implemented by all elements of the keys array.
//
[ReliabilityContract(Consistency.MayCorruptInstance, Cer.MayFail)]
public static void Sort(Array keys, Array items) {
if (keys==null)
throw new ArgumentNullException("keys");
Contract.EndContractBlock();
Sort(keys, items, keys.GetLowerBound(0), keys.Length, null);
}
// Sorts the elements in a section of an array. The sort compares the
// elements to each other using the IComparable interface, which
// must be implemented by all elements in the given section of the array.
//
[ReliabilityContract(Consistency.MayCorruptInstance, Cer.MayFail)]
public static void Sort(Array array, int index, int length) {
Sort(array, null, index, length, null);
}
// Sorts the elements in a section of two arrays based on the keys in the
// first array. Elements in the keys array specify the sort keys for
// corresponding elements in the items array. The sort compares the
// keys to each other using the IComparable interface, which must be
// implemented by all elements of the keys array.
//
[ReliabilityContract(Consistency.MayCorruptInstance, Cer.MayFail)]
public static void Sort(Array keys, Array items, int index, int length) {
Sort(keys, items, index, length, null);
}
// Sorts the elements of an array. The sort compares the elements to each
// other using the given IComparer interface. If comparer is
// null, the elements are compared to each other using the
// IComparable interface, which in that case must be implemented by
// all elements of the array.
//
[ReliabilityContract(Consistency.MayCorruptInstance, Cer.MayFail)]
public static void Sort(Array array, IComparer comparer) {
if (array==null)
throw new ArgumentNullException("array");
Contract.EndContractBlock();
Sort(array, null, array.GetLowerBound(0), array.Length, comparer);
}
// Sorts the elements of two arrays based on the keys in the first array.
// Elements in the keys array specify the sort keys for
// corresponding elements in the items array. The sort compares the
// keys to each other using the given IComparer interface. If
// comparer is null, the elements are compared to each other using
// the IComparable interface, which in that case must be implemented
// by all elements of the keys array.
//
[ReliabilityContract(Consistency.MayCorruptInstance, Cer.MayFail)]
public static void Sort(Array keys, Array items, IComparer comparer) {
if (keys==null)
throw new ArgumentNullException("keys");
Contract.EndContractBlock();
Sort(keys, items, keys.GetLowerBound(0), keys.Length, comparer);
}
// Sorts the elements in a section of an array. The sort compares the
// elements to each other using the given IComparer interface. If
// comparer is null, the elements are compared to each other using
// the IComparable interface, which in that case must be implemented
// by all elements in the given section of the array.
//
[ReliabilityContract(Consistency.MayCorruptInstance, Cer.MayFail)]
public static void Sort(Array array, int index, int length, IComparer comparer) {
Sort(array, null, index, length, comparer);
}
// Sorts the elements in a section of two arrays based on the keys in the
// first array. Elements in the keys array specify the sort keys for
// corresponding elements in the items array. The sort compares the
// keys to each other using the given IComparer interface. If
// comparer is null, the elements are compared to each other using
// the IComparable interface, which in that case must be implemented
// by all elements of the given section of the keys array.
//
[System.Security.SecuritySafeCritical] // auto-generated
[ReliabilityContract(Consistency.MayCorruptInstance, Cer.MayFail)]
public static void Sort(Array keys, Array items, int index, int length, IComparer comparer) {
if (keys==null)
throw new ArgumentNullException("keys");
if (keys.Rank != 1 || (items != null && items.Rank != 1))
throw new RankException(Environment.GetResourceString("Rank_MultiDimNotSupported"));
if (items != null && keys.GetLowerBound(0) != items.GetLowerBound(0))
throw new ArgumentException(Environment.GetResourceString("Arg_LowerBoundsMustMatch"));
if (index < keys.GetLowerBound(0) || length < 0)
throw new ArgumentOutOfRangeException((length<0 ? "length" : "index"), Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum"));
if (keys.Length - (index - keys.GetLowerBound(0)) < length || (items != null && (index - items.GetLowerBound(0)) > items.Length - length))
throw new ArgumentException(Environment.GetResourceString("Argument_InvalidOffLen"));
Contract.EndContractBlock();
if (length > 1) {
if (comparer == Comparer.Default || comparer == null) {
bool r = TrySZSort(keys, items, index, index + length - 1);
if (r)
return;
}
Object[] objKeys = keys as Object[];
Object[] objItems = null;
if (objKeys != null)
objItems = items as Object[];
if (objKeys != null && (items==null || objItems != null)) {
SorterObjectArray sorter = new SorterObjectArray(objKeys, objItems, comparer);
sorter.Sort(index, length);
}
else {
SorterGenericArray sorter = new SorterGenericArray(keys, items, comparer);
sorter.Sort(index, length);
}
}
}
[System.Security.SecurityCritical] // auto-generated
[ResourceExposure(ResourceScope.None)]
[MethodImplAttribute(MethodImplOptions.InternalCall)]
[ReliabilityContract(Consistency.MayCorruptInstance, Cer.MayFail)]
private static extern bool TrySZSort(Array keys, Array items, int left, int right);
#if ARRAY_GENERIC_METHODS
[ReliabilityContract(Consistency.MayCorruptInstance, Cer.MayFail)]
public static void Sort<T>(T[] array) {
if (array==null)
throw new ArgumentNullException("array");
Contract.EndContractBlock();
Sort<T>(array, array.GetLowerBound(0), array.Length, null);
}
[ReliabilityContract(Consistency.MayCorruptInstance, Cer.MayFail)]
public static void Sort<TKey, TValue>(TKey[] keys, TValue[] items) {
if (keys==null)
throw new ArgumentNullException("keys");
Contract.EndContractBlock();
Sort<TKey, TValue>(keys, items, 0, keys.Length, null);
}
[ReliabilityContract(Consistency.MayCorruptInstance, Cer.MayFail)]
public static void Sort<T>(T[] array, int index, int length) {
Sort<T>(array, index, length, null);
}
[ReliabilityContract(Consistency.MayCorruptInstance, Cer.MayFail)]
public static void Sort<TKey, TValue>(TKey[] keys, TValue[] items, int index, int length) {
Sort<TKey, TValue>(keys, items, index, length, null);
}
[ReliabilityContract(Consistency.MayCorruptInstance, Cer.MayFail)]
public static void Sort<T>(T[] array, System.Collections.Generic.IComparer<T> comparer) {
if (array==null)
throw new ArgumentNullException("array");
Contract.EndContractBlock();
Sort<T>(array, 0, array.Length, comparer);
}
[ReliabilityContract(Consistency.MayCorruptInstance, Cer.MayFail)]
public static void Sort<TKey, TValue>(TKey[] keys, TValue[] items, System.Collections.Generic.IComparer<TKey> comparer) {
if (keys==null)
throw new ArgumentNullException("keys");
Contract.EndContractBlock();
Sort<TKey, TValue>(keys, items, 0, keys.Length, comparer);
}
[System.Security.SecuritySafeCritical] // auto-generated
[ReliabilityContract(Consistency.MayCorruptInstance, Cer.MayFail)]
public static void Sort<T>(T[] array, int index, int length, System.Collections.Generic.IComparer<T> comparer) {
if (array==null)
throw new ArgumentNullException("array");
if (index < 0 || length < 0)
throw new ArgumentOutOfRangeException((length<0 ? "length" : "index"), Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum"));
if (array.Length - index < length)
throw new ArgumentException(Environment.GetResourceString("Argument_InvalidOffLen"));
Contract.EndContractBlock();
if (length > 1) {
// <
if ( comparer == null || comparer == Comparer<T>.Default ) {
if(TrySZSort(array, null, index, index + length - 1)) {
return;
}
}
#if FEATURE_LEGACYNETCF
if (CompatibilitySwitches.IsAppEarlierThanWindowsPhone8)
MangoArraySortHelper<T>.Default.Sort(array, index, length, comparer);
else
ArraySortHelper<T>.Default.Sort(array, index, length, comparer);
#else
ArraySortHelper<T>.Default.Sort(array, index, length, comparer);
#endif
}
}
[System.Security.SecuritySafeCritical] // auto-generated
[ReliabilityContract(Consistency.MayCorruptInstance, Cer.MayFail)]
public static void Sort<TKey, TValue>(TKey[] keys, TValue[] items, int index, int length, System.Collections.Generic.IComparer<TKey> comparer) {
if (keys==null)
throw new ArgumentNullException("keys");
if (index < 0 || length < 0)
throw new ArgumentOutOfRangeException((length<0 ? "length" : "index"), Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum"));
if (keys.Length - index < length || (items != null && index > items.Length - length))
throw new ArgumentException(Environment.GetResourceString("Argument_InvalidOffLen"));
Contract.EndContractBlock();
if (length > 1) {
if ( comparer == null || comparer == Comparer<TKey>.Default ) {
if(TrySZSort(keys, items, index, index + length - 1)) {
return;
}
}
if (items == null)
{
Sort<TKey>(keys, index, length, comparer);
return;
}
#if FEATURE_LEGACYNETCF
if (CompatibilitySwitches.IsAppEarlierThanWindowsPhone8)
MangoArraySortHelper<TKey>.Default.Sort<TValue>(keys, items, index, length, comparer);
else
ArraySortHelper<TKey, TValue>.Default.Sort(keys, items, index, length, comparer);
#else
ArraySortHelper<TKey, TValue>.Default.Sort(keys, items, index, length, comparer);
#endif
}
}
#endif
public static void Sort<T>(T[] array, Comparison<T> comparison) {
if( array == null) {
throw new ArgumentNullException("array");
}
if( comparison == null) {
throw new ArgumentNullException("comparison");
}
Contract.EndContractBlock();
IComparer<T> comparer = new FunctorComparer<T>(comparison);
Array.Sort(array, comparer);
}
public static bool TrueForAll<T>(T[] array, Predicate<T> match) {
if( array == null) {
throw new ArgumentNullException("array");
}
if( match == null) {
throw new ArgumentNullException("match");
}
Contract.EndContractBlock();
for(int i = 0 ; i < array.Length; i++) {
if( !match(array[i])) {
return false;
}
}
return true;
}
internal sealed class FunctorComparer<T> : IComparer<T> {
Comparison<T> comparison;
public FunctorComparer(Comparison<T> comparison) {
this.comparison = comparison;
}
public int Compare(T x, T y) {
return comparison(x, y);
}
}
// Private value type used by the Sort methods.
private struct SorterObjectArray
{
private Object[] keys;
private Object[] items;
private IComparer comparer;
internal SorterObjectArray(Object[] keys, Object[] items, IComparer comparer) {
if (comparer == null) comparer = Comparer.Default;
this.keys = keys;
this.items = items;
this.comparer = comparer;
}
internal void SwapIfGreaterWithItems(int a, int b)
{
if (a != b)
{
if (comparer.Compare(keys[a], keys[b]) > 0)
{
Object temp = keys[a];
keys[a] = keys[b];
keys[b] = temp;
if (items != null)
{
Object item = items[a];
items[a] = items[b];
items[b] = item;
}
}
}
}
private void Swap(int i, int j)
{
Object t = keys[i];
keys[i] = keys[j];
keys[j] = t;
if (items != null)
{
Object item = items[i];
items[i] = items[j];
items[j] = item;
}
}
internal void Sort(int left, int length)
{
#if FEATURE_CORECLR
// Since QuickSort and IntrospectiveSort produce different sorting sequence for equal keys the upgrade
// to IntrospectiveSort was quirked. However since the phone builds always shipped with the new sort aka
// IntrospectiveSort and we would want to continue using this sort moving forward CoreCLR always uses the new sort.
IntrospectiveSort(left, length);
#else
if (BinaryCompatibility.TargetsAtLeast_Desktop_V4_5)
{
IntrospectiveSort(left, length);
}
else
{
DepthLimitedQuickSort(left, length + left - 1, IntrospectiveSortUtilities.QuickSortDepthThreshold);
}
#endif
}
private void DepthLimitedQuickSort(int left, int right, int depthLimit)
{
// Can use the much faster jit helpers for array access.
do
{
if (depthLimit == 0)
{
// Add a try block here to detect IComparers (or their
// underlying IComparables, etc) that are bogus.
try
{
Heapsort(left, right);
return;
}
catch (IndexOutOfRangeException)
{
throw new ArgumentException(Environment.GetResourceString("Arg_BogusIComparer", comparer));
}
catch (Exception e)
{
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_IComparerFailed"), e);
}
}
int i = left;
int j = right;
// pre-sort the low, middle (pivot), and high values in place.
// this improves performance in the face of already sorted data, or
// data that is made up of multiple sorted runs appended together.
int middle = GetMedian(i, j);
// Add a try block here to detect IComparers (or their
// underlying IComparables, etc) that are bogus.
try
{
SwapIfGreaterWithItems(i, middle); // swap the low with the mid point
SwapIfGreaterWithItems(i, j); // swap the low with the high
SwapIfGreaterWithItems(middle, j); // swap the middle with the high
}
catch (Exception e)
{
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_IComparerFailed"), e);
}
Object x = keys[middle];
do
{
// Add a try block here to detect IComparers (or their
// underlying IComparables, etc) that are bogus.
try
{
while (comparer.Compare(keys[i], x) < 0) i++;
while (comparer.Compare(x, keys[j]) < 0) j--;
}
catch (IndexOutOfRangeException)
{
throw new ArgumentException(Environment.GetResourceString("Arg_BogusIComparer", comparer));
}
catch (Exception e)
{
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_IComparerFailed"), e);
}
Contract.Assert(i >= left && j <= right, "(i>=left && j<=right) Sort failed - Is your IComparer bogus?");
if (i > j) break;
if (i < j)
{
Object key = keys[i];
keys[i] = keys[j];
keys[j] = key;
if (items != null)
{
Object item = items[i];
items[i] = items[j];
items[j] = item;
}
}
i++;
j--;
} while (i <= j);
// The next iteration of the while loop is to "recursively" sort the larger half of the array and the
// following calls recrusively sort the smaller half. So we subtrack one from depthLimit here so
// both sorts see the new value.
depthLimit--;
if (j - left <= right - i)
{
if (left < j) DepthLimitedQuickSort(left, j, depthLimit);
left = i;
}
else
{
if (i < right) DepthLimitedQuickSort(i, right, depthLimit);
right = j;
}
} while (left < right);
}
private void IntrospectiveSort(int left, int length)
{
if (length < 2)
return;
try
{
IntroSort(left, length + left - 1, 2 * IntrospectiveSortUtilities.FloorLog2(keys.Length));
}
catch (IndexOutOfRangeException)
{
IntrospectiveSortUtilities.ThrowOrIgnoreBadComparer(comparer);
}
catch (Exception e)
{
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_IComparerFailed"), e);
}
}
private void IntroSort(int lo, int hi, int depthLimit)
{
while (hi > lo)
{
int partitionSize = hi - lo + 1;
if (partitionSize <= IntrospectiveSortUtilities.IntrosortSizeThreshold)
{
if (partitionSize == 1)
{
return;
}
if (partitionSize == 2)
{
SwapIfGreaterWithItems(lo, hi);
return;
}
if (partitionSize == 3)
{
SwapIfGreaterWithItems(lo, hi-1);
SwapIfGreaterWithItems(lo, hi);
SwapIfGreaterWithItems(hi-1, hi);
return;
}
InsertionSort(lo, hi);
return;
}
if (depthLimit == 0)
{
Heapsort(lo, hi);
return;
}
depthLimit--;
int p = PickPivotAndPartition(lo, hi);
IntroSort(p + 1, hi, depthLimit);
hi = p - 1;
}
}
private int PickPivotAndPartition(int lo, int hi)
{
// Compute median-of-three. But also partition them, since we've done the comparison.
int mid = lo + (hi - lo) / 2;
// Sort lo, mid and hi appropriately, then pick mid as the pivot.
SwapIfGreaterWithItems(lo, mid);
SwapIfGreaterWithItems(lo, hi);
SwapIfGreaterWithItems(mid, hi);
Object pivot = keys[mid];
Swap(mid, hi - 1);
int left = lo, right = hi - 1; // We already partitioned lo and hi and put the pivot in hi - 1. And we pre-increment & decrement below.
while (left < right)
{
while (comparer.Compare(keys[++left], pivot) < 0) ;
while (comparer.Compare(pivot, keys[--right]) < 0) ;
if(left >= right)
break;
Swap(left, right);
}
// Put pivot in the right location.
Swap(left, (hi - 1));
return left;
}
private void Heapsort(int lo, int hi)
{
int n = hi - lo + 1;
for (int i = n / 2; i >= 1; i = i - 1)
{
DownHeap(i, n, lo);
}
for (int i = n; i > 1; i = i - 1)
{
Swap(lo, lo + i - 1);
DownHeap(1, i - 1, lo);
}
}
private void DownHeap(int i, int n, int lo)
{
Object d = keys[lo + i - 1];
Object dt = (items != null) ? items[lo + i - 1] : null;
int child;
while (i <= n / 2)
{
child = 2 * i;
if (child < n && comparer.Compare(keys[lo + child - 1], keys[lo + child]) < 0)
{
child++;
}
if (!(comparer.Compare(d, keys[lo + child - 1]) < 0))
break;
keys[lo + i - 1] = keys[lo + child - 1];
if(items != null)
items[lo + i - 1] = items[lo + child - 1];
i = child;
}
keys[lo + i - 1] = d;
if (items != null)
items[lo + i - 1] = dt;
}
private void InsertionSort(int lo, int hi)
{
int i, j;
Object t, ti;
for (i = lo; i < hi; i++)
{
j = i;
t = keys[i + 1];
ti = (items != null) ? items[i + 1] : null;
while (j >= lo && comparer.Compare(t, keys[j]) < 0)
{
keys[j + 1] = keys[j];
if(items != null)
items[j + 1] = items[j];
j--;
}
keys[j + 1] = t;
if(items != null)
items[j + 1] = ti;
}
}
}
// Private value used by the Sort methods for instances of Array.
// This is slower than the one for Object[], since we can't use the JIT helpers
// to access the elements. We must use GetValue & SetValue.
private struct SorterGenericArray
{
private Array keys;
private Array items;
private IComparer comparer;
internal SorterGenericArray(Array keys, Array items, IComparer comparer)
{
if (comparer == null) comparer = Comparer.Default;
this.keys = keys;
this.items = items;
this.comparer = comparer;
}
internal void SwapIfGreaterWithItems(int a, int b)
{
if (a != b)
{
if (comparer.Compare(keys.GetValue(a), keys.GetValue(b)) > 0)
{
Object key = keys.GetValue(a);
keys.SetValue(keys.GetValue(b), a);
keys.SetValue(key, b);
if (items != null)
{
Object item = items.GetValue(a);
items.SetValue(items.GetValue(b), a);
items.SetValue(item, b);
}
}
}
}
private void Swap(int i, int j)
{
Object t1 = keys.GetValue(i);
keys.SetValue(keys.GetValue(j), i);
keys.SetValue(t1, j);
if(items != null)
{
Object t2 = items.GetValue(i);
items.SetValue(items.GetValue(j), i);
items.SetValue(t2, j);
}
}
internal void Sort(int left, int length)
{
#if FEATURE_CORECLR
// Since QuickSort and IntrospectiveSort produce different sorting sequence for equal keys the upgrade
// to IntrospectiveSort was quirked. However since the phone builds always shipped with the new sort aka
// IntrospectiveSort and we would want to continue using this sort moving forward CoreCLR always uses the new sort.
IntrospectiveSort(left, length);
#else
if (BinaryCompatibility.TargetsAtLeast_Desktop_V4_5)
{
IntrospectiveSort(left, length);
}
else
{
DepthLimitedQuickSort(left, length + left - 1, IntrospectiveSortUtilities.QuickSortDepthThreshold);
}
#endif
}
private void DepthLimitedQuickSort(int left, int right, int depthLimit)
{
// Must use slow Array accessors (GetValue & SetValue)
do
{
if (depthLimit == 0)
{
// Add a try block here to detect IComparers (or their
// underlying IComparables, etc) that are bogus.
try
{
Heapsort(left, right);
return;
}
catch (IndexOutOfRangeException)
{
throw new ArgumentException(Environment.GetResourceString("Arg_BogusIComparer", comparer));
}
catch (Exception e)
{
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_IComparerFailed"), e);
}
}
int i = left;
int j = right;
// pre-sort the low, middle (pivot), and high values in place.
// this improves performance in the face of already sorted data, or
// data that is made up of multiple sorted runs appended together.
int middle = GetMedian(i, j);
try
{
SwapIfGreaterWithItems(i, middle); // swap the low with the mid point
SwapIfGreaterWithItems(i, j); // swap the low with the high
SwapIfGreaterWithItems(middle, j); // swap the middle with the high
}
catch (Exception e)
{
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_IComparerFailed"), e);
}
Object x = keys.GetValue(middle);
do
{
// Add a try block here to detect IComparers (or their
// underlying IComparables, etc) that are bogus.
try
{
while (comparer.Compare(keys.GetValue(i), x) < 0) i++;
while (comparer.Compare(x, keys.GetValue(j)) < 0) j--;
}
catch (IndexOutOfRangeException)
{
throw new ArgumentException(Environment.GetResourceString("Arg_BogusIComparer", comparer));
}
catch (Exception e)
{
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_IComparerFailed"), e);
}
Contract.Assert(i >= left && j <= right, "(i>=left && j<=right) Sort failed - Is your IComparer bogus?");
if (i > j) break;
if (i < j)
{
Object key = keys.GetValue(i);
keys.SetValue(keys.GetValue(j), i);
keys.SetValue(key, j);
if (items != null)
{
Object item = items.GetValue(i);
items.SetValue(items.GetValue(j), i);
items.SetValue(item, j);
}
}
if (i != Int32.MaxValue) ++i;
if (j != Int32.MinValue) --j;
} while (i <= j);
// The next iteration of the while loop is to "recursively" sort the larger half of the array and the
// following calls recrusively sort the smaller half. So we subtrack one from depthLimit here so
// both sorts see the new value.
depthLimit--;
if (j - left <= right - i)
{
if (left < j) DepthLimitedQuickSort(left, j, depthLimit);
left = i;
}
else
{
if (i < right) DepthLimitedQuickSort(i, right, depthLimit);
right = j;
}
} while (left < right);
}
private void IntrospectiveSort(int left, int length)
{
if (length < 2)
return;
try
{
IntroSort(left, length + left - 1, 2 * IntrospectiveSortUtilities.FloorLog2(keys.Length));
}
catch (IndexOutOfRangeException)
{
IntrospectiveSortUtilities.ThrowOrIgnoreBadComparer(comparer);
}
catch (Exception e)
{
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_IComparerFailed"), e);
}
}
private void IntroSort(int lo, int hi, int depthLimit)
{
while (hi > lo)
{
int partitionSize = hi - lo + 1;
if (partitionSize <= IntrospectiveSortUtilities.IntrosortSizeThreshold)
{
if (partitionSize == 1)
{
return;
}
if (partitionSize == 2)
{
SwapIfGreaterWithItems(lo, hi);
return;
}
if (partitionSize == 3)
{
SwapIfGreaterWithItems(lo, hi-1);
SwapIfGreaterWithItems(lo, hi);
SwapIfGreaterWithItems(hi-1, hi);
return;
}
InsertionSort(lo, hi);
return;
}
if (depthLimit == 0)
{
Heapsort(lo, hi);
return;
}
depthLimit--;
int p = PickPivotAndPartition(lo, hi);
IntroSort(p + 1, hi, depthLimit);
hi = p - 1;
}
}
private int PickPivotAndPartition(int lo, int hi)
{
// Compute median-of-three. But also partition them, since we've done the comparison.
int mid = lo + (hi - lo) / 2;
SwapIfGreaterWithItems(lo, mid);
SwapIfGreaterWithItems(lo, hi);
SwapIfGreaterWithItems(mid, hi);
Object pivot = keys.GetValue(mid);
Swap(mid, hi - 1);
int left = lo, right = hi - 1; // We already partitioned lo and hi and put the pivot in hi - 1. And we pre-increment & decrement below.
while (left < right)
{
while (comparer.Compare(keys.GetValue(++left), pivot) < 0) ;
while (comparer.Compare(pivot, keys.GetValue(--right)) < 0) ;
if (left >= right)
break;
Swap(left, right);
}
// Put pivot in the right location.
Swap(left, (hi - 1));
return left;
}
private void Heapsort(int lo, int hi)
{
int n = hi - lo + 1;
for (int i = n / 2; i >= 1; i = i - 1)
{
DownHeap(i, n, lo);
}
for (int i = n; i > 1; i = i - 1)
{
Swap(lo, lo + i - 1);
DownHeap(1, i - 1, lo);
}
}
private void DownHeap(int i, int n, int lo)
{
Object d = keys.GetValue(lo + i - 1);
Object dt = (items != null)? items.GetValue(lo + i - 1) : null;
int child;
while (i <= n / 2)
{
child = 2 * i;
if (child < n && comparer.Compare(keys.GetValue(lo + child - 1), keys.GetValue(lo + child)) < 0)
{
child++;
}
if (!(comparer.Compare(d, keys.GetValue(lo + child - 1)) < 0))
break;
keys.SetValue(keys.GetValue(lo + child - 1), lo + i - 1);
if(items != null)
items.SetValue(items.GetValue(lo + child - 1), lo + i - 1);
i = child;
}
keys.SetValue(d, lo + i - 1);
if(items != null)
items.SetValue(dt, lo + i - 1);
}
private void InsertionSort(int lo, int hi)
{
int i, j;
Object t, dt;
for (i = lo; i < hi; i++)
{
j = i;
t = keys.GetValue(i + 1);
dt = (items != null)? items.GetValue(i + 1) : null;
while (j >= lo && comparer.Compare(t, keys.GetValue(j)) < 0)
{
keys.SetValue(keys.GetValue(j), j + 1);
if(items != null)
items.SetValue(items.GetValue(j), j + 1);
j--;
}
keys.SetValue(t, j + 1);
if(items != null)
items.SetValue(dt, j + 1);
}
}
}
[Serializable] private sealed class SZArrayEnumerator : IEnumerator, ICloneable
{
private Array _array;
private int _index;
private int _endIndex; // cache array length, since it's a little slow.
internal SZArrayEnumerator(Array array) {
Contract.Assert(array.Rank == 1 && array.GetLowerBound(0) == 0, "SZArrayEnumerator only works on single dimension arrays w/ a lower bound of zero.");
_array = array;
_index = -1;
_endIndex = array.Length;
}
public Object Clone()
{
return MemberwiseClone();
}
public bool MoveNext() {
if (_index < _endIndex) {
_index++;
return (_index < _endIndex);
}
return false;
}
public Object Current {
get {
if (_index < 0) throw new InvalidOperationException(Environment.GetResourceString(ResId.InvalidOperation_EnumNotStarted));
if (_index >= _endIndex) throw new InvalidOperationException(Environment.GetResourceString(ResId.InvalidOperation_EnumEnded));
return _array.GetValue(_index);
}
}
public void Reset() {
_index = -1;
}
}
[Serializable] private sealed class ArrayEnumerator : IEnumerator, ICloneable
{
private Array array;
private int index;
private int endIndex;
private int startIndex; // Save for Reset.
private int[] _indices; // The current position in a multidim array
private bool _complete;
internal ArrayEnumerator(Array array, int index, int count) {
this.array = array;
this.index = index - 1;
startIndex = index;
endIndex = index + count;
_indices = new int[array.Rank];
int checkForZero = 1; // Check for dimensions of size 0.
for(int i=0; i<array.Rank; i++) {
_indices[i] = array.GetLowerBound(i);
checkForZero *= array.GetLength(i);
}
// To make MoveNext simpler, decrement least significant index.
_indices[_indices.Length-1]--;
_complete = (checkForZero == 0);
}
private void IncArray() {
// This method advances us to the next valid array index,
// handling all the multiple dimension & bounds correctly.
// Think of it like an odometer in your car - we start with
// the last digit, increment it, and check for rollover. If
// it rolls over, we set all digits to the right and including
// the current to the appropriate lower bound. Do these overflow
// checks for each dimension, and if the most significant digit
// has rolled over it's upper bound, we're done.
//
int rank = array.Rank;
_indices[rank-1]++;
for(int dim=rank-1; dim>=0; dim--) {
if (_indices[dim] > array.GetUpperBound(dim)) {
if (dim==0) {
_complete = true;
break;
}
for(int j=dim; j<rank; j++)
_indices[j] = array.GetLowerBound(j);
_indices[dim-1]++;
}
}
}
public Object Clone()
{
return MemberwiseClone();
}
public bool MoveNext() {
if (_complete) {
index = endIndex;
return false;
}
index++;
IncArray();
return !_complete;
}
public Object Current {
get {
if (index < startIndex) throw new InvalidOperationException(Environment.GetResourceString(ResId.InvalidOperation_EnumNotStarted));
if (_complete) throw new InvalidOperationException(Environment.GetResourceString(ResId.InvalidOperation_EnumEnded));
return array.GetValue(_indices);
}
}
public void Reset() {
index = startIndex - 1;
int checkForZero = 1;
for(int i=0; i<array.Rank; i++) {
_indices[i] = array.GetLowerBound(i);
checkForZero *= array.GetLength(i);
}
_complete = (checkForZero == 0);
// To make MoveNext simpler, decrement least significant index.
_indices[_indices.Length-1]--;
}
}
// if this is an array of value classes and that value class has a default constructor
// then this calls this default constructor on every element in the value class array.
// otherwise this is a no-op. Generally this method is called automatically by the compiler
[System.Security.SecuritySafeCritical] // auto-generated
[ResourceExposure(ResourceScope.None)]
[MethodImplAttribute(MethodImplOptions.InternalCall)]
public extern void Initialize();
}
//----------------------------------------------------------------------------------------
// ! READ THIS BEFORE YOU WORK ON THIS CLASS.
//
// The methods on this class must be written VERY carefully to avoid introducing security holes.
// That's because they are invoked with special "this"! The "this" object
// for all of these methods are not SZArrayHelper objects. Rather, they are of type U[]
// where U[] is castable to T[]. No actual SZArrayHelper object is ever instantiated. Thus, you will
// see a lot of expressions that cast "this" "T[]".
//
// This class is needed to allow an SZ array of type T[] to expose IList<T>,
// IList<T.BaseType>, etc., etc. all the way up to IList<Object>. When the following call is
// made:
//
// ((IList<T>) (new U[n])).SomeIListMethod()
//
// the interface stub dispatcher treats this as a special case, loads up SZArrayHelper,
// finds the corresponding generic method (matched simply by method name), instantiates
// it for type <T> and executes it.
//
// The "T" will reflect the interface used to invoke the method. The actual runtime "this" will be
// array that is castable to "T[]" (i.e. for primitivs and valuetypes, it will be exactly
// "T[]" - for orefs, it may be a "U[]" where U derives from T.)
//----------------------------------------------------------------------------------------
sealed class SZArrayHelper {
// It is never legal to instantiate this class.
private SZArrayHelper() {
Contract.Assert(false, "Hey! How'd I get here?");
}
// -----------------------------------------------------------
// ------- Implement IEnumerable<T> interface methods --------
// -----------------------------------------------------------
[SecuritySafeCritical]
internal IEnumerator<T> GetEnumerator<T>() {
//! Warning: "this" is an array, not an SZArrayHelper. See comments above
//! or you may introduce a security hole!
T[] _this = JitHelpers.UnsafeCast<T[]>(this);
int length = _this.Length;
return length == 0 ? SZGenericArrayEnumerator<T>.Empty : new SZGenericArrayEnumerator<T>(_this, length);
}
// -----------------------------------------------------------
// ------- Implement ICollection<T> interface methods --------
// -----------------------------------------------------------
[SecuritySafeCritical]
void CopyTo<T>(T[] array, int index) {
//! Warning: "this" is an array, not an SZArrayHelper. See comments above
//! or you may introduce a security hole!
if (array != null && array.Rank != 1)
throw new ArgumentException(Environment.GetResourceString("Rank_MultiDimNotSupported"));
Contract.EndContractBlock();
T[] _this = JitHelpers.UnsafeCast<T[]>(this);
Array.Copy(_this, 0, array, index, _this.Length);
}
[SecuritySafeCritical]
internal int get_Count<T>() {
//! Warning: "this" is an array, not an SZArrayHelper. See comments above
//! or you may introduce a security hole!
T[] _this = JitHelpers.UnsafeCast<T[]>(this);
return _this.Length;
}
// -----------------------------------------------------------
// ---------- Implement IList<T> interface methods -----------
// -----------------------------------------------------------
[SecuritySafeCritical]
internal T get_Item<T>(int index) {
//! Warning: "this" is an array, not an SZArrayHelper. See comments above
//! or you may introduce a security hole!
T[] _this = JitHelpers.UnsafeCast<T[]>(this);
if ((uint)index >= (uint)_this.Length) {
ThrowHelper.ThrowArgumentOutOfRangeException();
}
return _this[index];
}
[SecuritySafeCritical]
internal void set_Item<T>(int index, T value) {
//! Warning: "this" is an array, not an SZArrayHelper. See comments above
//! or you may introduce a security hole!
T[] _this = JitHelpers.UnsafeCast<T[]>(this);
if ((uint)index >= (uint)_this.Length) {
ThrowHelper.ThrowArgumentOutOfRangeException();
}
_this[index] = value;
}
void Add<T>(T value) {
// Not meaningful for arrays.
throw new NotSupportedException(Environment.GetResourceString("NotSupported_FixedSizeCollection"));
}
[SecuritySafeCritical]
bool Contains<T>(T value) {
//! Warning: "this" is an array, not an SZArrayHelper. See comments above
//! or you may introduce a security hole!
T[] _this = JitHelpers.UnsafeCast<T[]>(this);
return Array.IndexOf(_this, value) != -1;
}
bool get_IsReadOnly<T>() {
return true;
}
void Clear<T>() {
//! Warning: "this" is an array, not an SZArrayHelper. See comments above
//! or you may introduce a security hole!
throw new NotSupportedException(Environment.GetResourceString("NotSupported_ReadOnlyCollection"));
}
[SecuritySafeCritical]
int IndexOf<T>(T value) {
//! Warning: "this" is an array, not an SZArrayHelper. See comments above
//! or you may introduce a security hole!
T[] _this = JitHelpers.UnsafeCast<T[]>(this);
return Array.IndexOf(_this, value);
}
void Insert<T>(int index, T value) {
// Not meaningful for arrays
throw new NotSupportedException(Environment.GetResourceString("NotSupported_FixedSizeCollection"));
}
bool Remove<T>(T value) {
// Not meaningful for arrays
throw new NotSupportedException(Environment.GetResourceString("NotSupported_FixedSizeCollection"));
}
void RemoveAt<T>(int index) {
// Not meaningful for arrays
throw new NotSupportedException(Environment.GetResourceString("NotSupported_FixedSizeCollection"));
}
// This is a normal generic Enumerator for SZ arrays. It doesn't have any of the "this" stuff
// that SZArrayHelper does.
//
[Serializable] private sealed class SZGenericArrayEnumerator<T> : IEnumerator<T> {
private T[] _array;
private int _index;
private int _endIndex; // cache array length, since it's a little slow.
// Passing -1 for endIndex so that MoveNext always returns false without mutating _index
internal static readonly SZGenericArrayEnumerator<T> Empty = new SZGenericArrayEnumerator<T>(null, -1);
internal SZGenericArrayEnumerator(T[] array, int endIndex) {
// We allow passing null array in case of empty enumerator.
Contract.Assert((array == null && endIndex == -1) || (array.Rank == 1 && array.GetLowerBound(0) == 0),
"SZArrayEnumerator<T> only works on single dimension arrays w/ a lower bound of zero or with empty array for null enumerator.");
_array = array;
_index = -1;
_endIndex = endIndex;
}
public bool MoveNext() {
if (_index < _endIndex) {
_index++;
return (_index < _endIndex);
}
return false;
}
public T Current {
get {
if (_index < 0) throw new InvalidOperationException(Environment.GetResourceString(ResId.InvalidOperation_EnumNotStarted));
if (_index >= _endIndex) throw new InvalidOperationException(Environment.GetResourceString(ResId.InvalidOperation_EnumEnded));
return _array[_index];
}
}
object IEnumerator.Current {
get {
return Current;
}
}
void IEnumerator.Reset() {
_index = -1;
}
public void Dispose()
{
}
}
}
#if CONTRACTS_FULL
[ContractClassFor(typeof(Array))]
internal abstract class ArrayContracts : Array
{
private ArrayContracts() { }
public new int Rank
{
get
{
Contract.Ensures(Contract.Result<int>() >= 0);
return default(int);
}
}
public new int Length
{
get
{
Contract.Ensures(0 <= Contract.Result<int>());
return default(int);
}
}
// Copy
public new static void Copy(Array sourceArray, Array destinationArray, int length)
{
Contract.Requires(sourceArray != null);
Contract.Requires(destinationArray != null);
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);
}
public new static void Copy(Array sourceArray, int sourceIndex, Array destinationArray, int destinationIndex, int length)
{
Contract.Requires(sourceArray != null);
Contract.Requires(destinationArray != null);
Contract.Requires(sourceArray.Rank == destinationArray.Rank);
Contract.Requires(sourceIndex >= sourceArray.GetLowerBound(0));
Contract.Requires(destinationIndex >= destinationArray.GetLowerBound(0));
Contract.Requires(length >= 0);
Contract.Requires(sourceIndex + length <= sourceArray.GetLowerBound(0) + sourceArray.Length);
Contract.Requires(destinationIndex + length <= destinationArray.GetLowerBound(0) + destinationArray.Length);
}
public new static void ConstrainedCopy(Array sourceArray, int sourceIndex, Array destinationArray, int destinationIndex, int length)
{
Contract.Requires(sourceArray != null);
Contract.Requires(destinationArray != null);
Contract.Requires(sourceArray.Rank == destinationArray.Rank);
Contract.Requires(sourceIndex >= sourceArray.GetLowerBound(0));
Contract.Requires(destinationIndex >= destinationArray.GetLowerBound(0));
Contract.Requires(length >= 0);
Contract.Requires(sourceIndex + length <= sourceArray.GetLowerBound(0) + sourceArray.Length);
Contract.Requires(destinationIndex + length <= destinationArray.GetLowerBound(0) + destinationArray.Length);
}
public new static void Copy(Array sourceArray, Array destinationArray, long length)
{
Contract.Requires(sourceArray != null);
Contract.Requires(destinationArray != null);
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);
}
public new static void Copy(Array sourceArray, long sourceIndex, Array destinationArray, long destinationIndex, long length)
{
Contract.Requires(sourceArray != null);
Contract.Requires(destinationArray != null);
Contract.Requires(sourceArray.Rank == destinationArray.Rank);
Contract.Requires(sourceIndex >= sourceArray.GetLowerBound(0));
Contract.Requires(destinationIndex >= destinationArray.GetLowerBound(0));
Contract.Requires(length >= 0);
Contract.Requires(sourceIndex + length <= sourceArray.GetLowerBound(0) + sourceArray.Length);
Contract.Requires(destinationIndex + length <= destinationArray.GetLowerBound(0) + destinationArray.Length);
}
public new static void Clear(Array array, int index, int length)
{
Contract.Requires(array != null);
Contract.Requires(index >= array.GetLowerBound(0)); // No precondition on the rank. But index >= the first dimension's lower bounds.
Contract.Requires(length >= 0);
Contract.Requires(array.Length - (index + array.GetLowerBound(0)) >= length);
}
public new Object GetValue(long index)
{
Contract.Requires(((Array)this).Rank == 1);
Contract.Requires(index >= ((Array)this).GetLowerBound(0));
Contract.Requires(index <= ((Array)this).GetUpperBound(0));
return default(Object);
}
public new Object GetValue(int index)
{
Contract.Requires(((Array)this).Rank == 1);
Contract.Requires(index >= ((Array)this).GetLowerBound(0));
Contract.Requires(index <= ((Array)this).GetUpperBound(0));
return default(Object);
}
public new void SetValue(Object value, int index)
{
Contract.Requires(((Array)this).Rank == 1);
Contract.Requires(index >= ((Array)this).GetLowerBound(0));
Contract.Requires(index <= ((Array)this).GetUpperBound(0));
}
public new int GetUpperBound(int dimension)
{
Contract.Requires(dimension >= 0);
Contract.Requires(dimension <= ((Array)this).Rank);
return default(int);
}
public new int GetLowerBound(int dimension)
{
Contract.Requires(dimension >= 0);
Contract.Requires(dimension <= ((Array)this).Rank);
return default(int);
}
public new static void Sort(Array keys, Array items, int index, int length, System.Collections.IComparer comparer)
{
Contract.Requires(keys != null);
Contract.Requires(keys.Rank == 1);
Contract.Requires(items == null || items.Rank == 1);
Contract.Requires(items == null || keys.GetLowerBound(0) == items.GetLowerBound(0));
Contract.Requires(index >= keys.GetLowerBound(0));
Contract.Requires(length >= 0);
Contract.Requires(keys.GetLowerBound(0) + index + length <= keys.Length);
Contract.Requires(items == null || index + length <= items.Length);
}
public new static void Sort(Array array, int index, int length, System.Collections.IComparer comparer)
{
Contract.Requires(array != null);
Contract.Requires(array.Rank == 1);
Contract.Requires(index >= array.GetLowerBound(0));
Contract.Requires(