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Brian Fiete
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3242 changed files with 1616395 additions and 0 deletions
470
IDE/mintest/minlib/src/System/BitConverter.bf
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470
IDE/mintest/minlib/src/System/BitConverter.bf
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// ==++==
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//
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||||
// Copyright (c) Microsoft Corporation. All rights reserved.
|
||||
//
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||||
// ==--==
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/*============================================================
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||||
**
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** Class: BitConverter
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**
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**
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** Purpose: Allows developers to view the base data types as
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** an arbitrary array of bits.
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**
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**
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===========================================================*/
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namespace System
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{
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using System;
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using System.Diagnostics.Contracts;
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// The BitConverter class contains methods for
|
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// converting an array of bytes to one of the base data
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// types, as well as for converting a base data type to an
|
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// array of bytes.
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//
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// Only statics, does not need to be marked with the serializable attribute
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public static class BitConverter
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{
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||||
|
||||
// This field indicates the "endianess" of the architecture.
|
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// The value is set to true if the architecture is
|
||||
// little endian; false if it is big endian.
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||||
#if BIGENDIAN
|
||||
public static readonly bool IsLittleEndian /* = false */;
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||||
#else
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||||
public static readonly bool IsLittleEndian = true;
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||||
#endif
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|
||||
/*
|
||||
// Converts a byte into an array of bytes with length one.
|
||||
public static byte[] GetBytes(bool value) {
|
||||
Contract.Ensures(Contract.Result<byte[]>() != null);
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||||
Contract.Ensures(Contract.Result<byte[]>().Length == 1);
|
||||
|
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byte[] r = new byte[1];
|
||||
r[0] = (value ? (byte)Boolean.True : (byte)Boolean.False );
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return r;
|
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}
|
||||
|
||||
// Converts a char into an array of bytes with length two.
|
||||
public static byte[] GetBytes(char value)
|
||||
{
|
||||
Contract.Ensures(Contract.Result<byte[]>() != null);
|
||||
Contract.Ensures(Contract.Result<byte[]>().Length == 2);
|
||||
|
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return GetBytes((short)value);
|
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}
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||||
|
||||
// Converts a short into an array of bytes with length
|
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// two.
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[System.Security.SecuritySafeCritical] // auto-generated
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public static byte[] GetBytes(short value)
|
||||
{
|
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Contract.Ensures(Contract.Result<byte[]>() != null);
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Contract.Ensures(Contract.Result<byte[]>().Length == 2);
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byte[] bytes = new byte[2];
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fixed(byte* b = bytes)
|
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*((short*)b) = value;
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return bytes;
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||||
}
|
||||
|
||||
// Converts an int into an array of bytes with length
|
||||
// four.
|
||||
[System.Security.SecuritySafeCritical] // auto-generated
|
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public static byte[] GetBytes(int value)
|
||||
{
|
||||
Contract.Ensures(Contract.Result<byte[]>() != null);
|
||||
Contract.Ensures(Contract.Result<byte[]>().Length == 4);
|
||||
|
||||
byte[] bytes = new byte[4];
|
||||
fixed(byte* b = bytes)
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||||
*((int*)b) = value;
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||||
return bytes;
|
||||
}
|
||||
|
||||
// Converts a long into an array of bytes with length
|
||||
// eight.
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||||
[System.Security.SecuritySafeCritical] // auto-generated
|
||||
public static byte[] GetBytes(long value)
|
||||
{
|
||||
Contract.Ensures(Contract.Result<byte[]>() != null);
|
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Contract.Ensures(Contract.Result<byte[]>().Length == 8);
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||||
|
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byte[] bytes = new byte[8];
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||||
fixed(byte* b = bytes)
|
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*((long*)b) = value;
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return bytes;
|
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}
|
||||
|
||||
// Converts an ushort into an array of bytes with
|
||||
// length two.
|
||||
[CLSCompliant(false)]
|
||||
public static byte[] GetBytes(ushort value) {
|
||||
Contract.Ensures(Contract.Result<byte[]>() != null);
|
||||
Contract.Ensures(Contract.Result<byte[]>().Length == 2);
|
||||
|
||||
return GetBytes((short)value);
|
||||
}
|
||||
|
||||
// Converts an uint into an array of bytes with
|
||||
// length four.
|
||||
[CLSCompliant(false)]
|
||||
public static byte[] GetBytes(uint value) {
|
||||
Contract.Ensures(Contract.Result<byte[]>() != null);
|
||||
Contract.Ensures(Contract.Result<byte[]>().Length == 4);
|
||||
|
||||
return GetBytes((int)value);
|
||||
}
|
||||
|
||||
// Converts an unsigned long into an array of bytes with
|
||||
// length eight.
|
||||
[CLSCompliant(false)]
|
||||
public static byte[] GetBytes(ulong value) {
|
||||
Contract.Ensures(Contract.Result<byte[]>() != null);
|
||||
Contract.Ensures(Contract.Result<byte[]>().Length == 8);
|
||||
|
||||
return GetBytes((long)value);
|
||||
}
|
||||
|
||||
// Converts a float into an array of bytes with length
|
||||
// four.
|
||||
[System.Security.SecuritySafeCritical] // auto-generated
|
||||
public static byte[] GetBytes(float value)
|
||||
{
|
||||
Contract.Ensures(Contract.Result<byte[]>() != null);
|
||||
Contract.Ensures(Contract.Result<byte[]>().Length == 4);
|
||||
|
||||
return GetBytes(*(int*)&value);
|
||||
}
|
||||
|
||||
// Converts a double into an array of bytes with length
|
||||
// eight.
|
||||
[System.Security.SecuritySafeCritical] // auto-generated
|
||||
public static byte[] GetBytes(double value)
|
||||
{
|
||||
Contract.Ensures(Contract.Result<byte[]>() != null);
|
||||
Contract.Ensures(Contract.Result<byte[]>().Length == 8);
|
||||
|
||||
return GetBytes(*(long*)&value);
|
||||
}
|
||||
|
||||
// Converts an array of bytes into a char.
|
||||
public static char ToChar(byte[] value, int startIndex)
|
||||
{
|
||||
if (value == null) {
|
||||
ThrowHelper.ThrowArgumentNullException(ExceptionArgument.value);
|
||||
}
|
||||
|
||||
if ((uint)startIndex >= value.Length) {
|
||||
ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument.startIndex, ExceptionResource.ArgumentOutOfRange_Index);
|
||||
}
|
||||
|
||||
if (startIndex > value.Length - 2) {
|
||||
ThrowHelper.ThrowArgumentException(ExceptionResource.Arg_ArrayPlusOffTooSmall);
|
||||
}
|
||||
Contract.EndContractBlock();
|
||||
|
||||
return (char)ToInt16(value, startIndex);
|
||||
}
|
||||
|
||||
// Converts an array of bytes into a short.
|
||||
[System.Security.SecuritySafeCritical] // auto-generated
|
||||
public static short ToInt16(byte[] value, int startIndex) {
|
||||
if( value == null) {
|
||||
ThrowHelper.ThrowArgumentNullException(ExceptionArgument.value);
|
||||
}
|
||||
|
||||
if ((uint) startIndex >= value.Length) {
|
||||
ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument.startIndex, ExceptionResource.ArgumentOutOfRange_Index);
|
||||
}
|
||||
|
||||
if (startIndex > value.Length -2) {
|
||||
ThrowHelper.ThrowArgumentException(ExceptionResource.Arg_ArrayPlusOffTooSmall);
|
||||
}
|
||||
Contract.EndContractBlock();
|
||||
|
||||
byte * pbyte = &value[startIndex];
|
||||
{
|
||||
if( startIndex % 2 == 0) { // data is aligned
|
||||
return *((short *) pbyte);
|
||||
}
|
||||
else {
|
||||
if( IsLittleEndian) {
|
||||
return (short)((*pbyte) | (*(pbyte + 1) << 8)) ;
|
||||
}
|
||||
else {
|
||||
return (short)((*pbyte << 8) | (*(pbyte + 1)));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
// Converts an array of bytes into an int.
|
||||
[System.Security.SecuritySafeCritical] // auto-generated
|
||||
public static int ToInt32 (byte[] value, int startIndex) {
|
||||
if( value == null) {
|
||||
ThrowHelper.ThrowArgumentNullException(ExceptionArgument.value);
|
||||
}
|
||||
|
||||
if ((uint) startIndex >= value.Length) {
|
||||
ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument.startIndex, ExceptionResource.ArgumentOutOfRange_Index);
|
||||
}
|
||||
|
||||
if (startIndex > value.Length -4) {
|
||||
ThrowHelper.ThrowArgumentException(ExceptionResource.Arg_ArrayPlusOffTooSmall);
|
||||
}
|
||||
Contract.EndContractBlock();
|
||||
|
||||
fixed( byte * pbyte = &value[startIndex]) {
|
||||
if( startIndex % 4 == 0) { // data is aligned
|
||||
return *((int *) pbyte);
|
||||
}
|
||||
else {
|
||||
if( IsLittleEndian) {
|
||||
return (*pbyte) | (*(pbyte + 1) << 8) | (*(pbyte + 2) << 16) | (*(pbyte + 3) << 24);
|
||||
}
|
||||
else {
|
||||
return (*pbyte << 24) | (*(pbyte + 1) << 16) | (*(pbyte + 2) << 8) | (*(pbyte + 3));
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Converts an array of bytes into a long.
|
||||
[System.Security.SecuritySafeCritical] // auto-generated
|
||||
public static long ToInt64 (byte[] value, int startIndex) {
|
||||
if (value == null) {
|
||||
ThrowHelper.ThrowArgumentNullException(ExceptionArgument.value);
|
||||
}
|
||||
|
||||
if ((uint) startIndex >= value.Length) {
|
||||
ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument.startIndex, ExceptionResource.ArgumentOutOfRange_Index);
|
||||
}
|
||||
|
||||
if (startIndex > value.Length -8) {
|
||||
ThrowHelper.ThrowArgumentException(ExceptionResource.Arg_ArrayPlusOffTooSmall);
|
||||
}
|
||||
Contract.EndContractBlock();
|
||||
|
||||
byte * pbyte = &value[startIndex];
|
||||
{
|
||||
if( startIndex % 8 == 0) { // data is aligned
|
||||
return *((long *) pbyte);
|
||||
}
|
||||
else {
|
||||
if( IsLittleEndian) {
|
||||
int i1 = (*pbyte) | (*(pbyte + 1) << 8) | (*(pbyte + 2) << 16) | (*(pbyte + 3) << 24);
|
||||
int i2 = (*(pbyte+4)) | (*(pbyte + 5) << 8) | (*(pbyte + 6) << 16) | (*(pbyte + 7) << 24);
|
||||
return (uint)i1 | ((long)i2 << 32);
|
||||
}
|
||||
else {
|
||||
int i1 = (*pbyte << 24) | (*(pbyte + 1) << 16) | (*(pbyte + 2) << 8) | (*(pbyte + 3));
|
||||
int i2 = (*(pbyte+4) << 24) | (*(pbyte + 5) << 16) | (*(pbyte + 6) << 8) | (*(pbyte + 7));
|
||||
return (uint)i2 | ((long)i1 << 32);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
// Converts an array of bytes into an ushort.
|
||||
//
|
||||
[CLSCompliant(false)]
|
||||
public static ushort ToUInt16(byte[] value, int startIndex)
|
||||
{
|
||||
if (value == null)
|
||||
ThrowHelper.ThrowArgumentNullException(ExceptionArgument.value);
|
||||
if ((uint)startIndex >= value.Length)
|
||||
ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument.startIndex, ExceptionResource.ArgumentOutOfRange_Index);
|
||||
if (startIndex > value.Length - 2)
|
||||
ThrowHelper.ThrowArgumentException(ExceptionResource.Arg_ArrayPlusOffTooSmall);
|
||||
Contract.EndContractBlock();
|
||||
|
||||
return (ushort)ToInt16(value, startIndex);
|
||||
}
|
||||
|
||||
// Converts an array of bytes into an uint.
|
||||
//
|
||||
[CLSCompliant(false)]
|
||||
public static uint ToUInt32(byte[] value, int startIndex)
|
||||
{
|
||||
if (value == null)
|
||||
ThrowHelper.ThrowArgumentNullException(ExceptionArgument.value);
|
||||
if ((uint)startIndex >= value.Length)
|
||||
ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument.startIndex, ExceptionResource.ArgumentOutOfRange_Index);
|
||||
if (startIndex > value.Length - 4)
|
||||
ThrowHelper.ThrowArgumentException(ExceptionResource.Arg_ArrayPlusOffTooSmall);
|
||||
Contract.EndContractBlock();
|
||||
|
||||
return (uint)ToInt32(value, startIndex);
|
||||
}
|
||||
|
||||
// Converts an array of bytes into an unsigned long.
|
||||
//
|
||||
[CLSCompliant(false)]
|
||||
public static ulong ToUInt64(byte[] value, int startIndex)
|
||||
{
|
||||
if (value == null)
|
||||
ThrowHelper.ThrowArgumentNullException(ExceptionArgument.value);
|
||||
if ((uint)startIndex >= value.Length)
|
||||
ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument.startIndex, ExceptionResource.ArgumentOutOfRange_Index);
|
||||
if (startIndex > value.Length - 8)
|
||||
ThrowHelper.ThrowArgumentException(ExceptionResource.Arg_ArrayPlusOffTooSmall);
|
||||
Contract.EndContractBlock();
|
||||
|
||||
return (ulong)ToInt64(value, startIndex);
|
||||
}
|
||||
|
||||
// Converts an array of bytes into a float.
|
||||
[System.Security.SecuritySafeCritical] // auto-generated
|
||||
public static float ToSingle (byte[] value, int startIndex)
|
||||
{
|
||||
if (value == null)
|
||||
ThrowHelper.ThrowArgumentNullException(ExceptionArgument.value);
|
||||
if ((uint)startIndex >= value.Length)
|
||||
ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument.startIndex, ExceptionResource.ArgumentOutOfRange_Index);
|
||||
if (startIndex > value.Length - 4)
|
||||
ThrowHelper.ThrowArgumentException(ExceptionResource.Arg_ArrayPlusOffTooSmall);
|
||||
Contract.EndContractBlock();
|
||||
|
||||
int val = ToInt32(value, startIndex);
|
||||
return *(float*)&val;
|
||||
}
|
||||
|
||||
// Converts an array of bytes into a double.
|
||||
[System.Security.SecuritySafeCritical] // auto-generated
|
||||
public static double ToDouble (byte[] value, int startIndex)
|
||||
{
|
||||
if (value == null)
|
||||
ThrowHelper.ThrowArgumentNullException(ExceptionArgument.value);
|
||||
if ((uint)startIndex >= value.Length)
|
||||
ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument.startIndex, ExceptionResource.ArgumentOutOfRange_Index);
|
||||
if (startIndex > value.Length - 8)
|
||||
ThrowHelper.ThrowArgumentException(ExceptionResource.Arg_ArrayPlusOffTooSmall);
|
||||
Contract.EndContractBlock();
|
||||
|
||||
long val = ToInt64(value, startIndex);
|
||||
return *(double*)&val;
|
||||
}
|
||||
|
||||
private static char GetHexValue(int i) {
|
||||
Contract.Assert( i >=0 && i <16, "i is out of range.");
|
||||
if (i<10) {
|
||||
return (char)(i + '0');
|
||||
}
|
||||
|
||||
return (char)(i - 10 + 'A');
|
||||
}
|
||||
|
||||
// Converts an array of bytes into a String.
|
||||
public static String ToString (byte[] value, int startIndex, int length) {
|
||||
if (value == null) {
|
||||
throw new ArgumentNullException("byteArray");
|
||||
}
|
||||
|
||||
if (startIndex < 0 || startIndex >= value.Length && startIndex > 0) { // Don't throw for a 0 length array.
|
||||
throw new ArgumentOutOfRangeException("startIndex", Environment.GetResourceString("ArgumentOutOfRange_StartIndex"));
|
||||
}
|
||||
|
||||
if (length < 0) {
|
||||
throw new ArgumentOutOfRangeException("length", Environment.GetResourceString("ArgumentOutOfRange_GenericPositive"));
|
||||
}
|
||||
|
||||
if (startIndex > value.Length - length) {
|
||||
throw new ArgumentException(Environment.GetResourceString("Arg_ArrayPlusOffTooSmall"));
|
||||
}
|
||||
Contract.EndContractBlock();
|
||||
|
||||
if (length == 0) {
|
||||
return string.Empty;
|
||||
}
|
||||
|
||||
if (length > (Int32.MaxValue / 3)) {
|
||||
// (Int32.MaxValue / 3) == 715,827,882 Bytes == 699 MB
|
||||
throw new ArgumentOutOfRangeException("length", Environment.GetResourceString("ArgumentOutOfRange_LengthTooLarge", (Int32.MaxValue / 3)));
|
||||
}
|
||||
|
||||
int chArrayLength = length * 3;
|
||||
|
||||
char[] chArray = new char[chArrayLength];
|
||||
int i = 0;
|
||||
int index = startIndex;
|
||||
for (i = 0; i < chArrayLength; i += 3) {
|
||||
byte b = value[index++];
|
||||
chArray[i]= GetHexValue(b/16);
|
||||
chArray[i+1] = GetHexValue(b%16);
|
||||
chArray[i+2] = '-';
|
||||
}
|
||||
|
||||
// We don't need the last '-' character
|
||||
return new String(chArray, 0, chArray.Length - 1);
|
||||
}
|
||||
|
||||
// Converts an array of bytes into a String.
|
||||
public static String ToString(byte [] value) {
|
||||
if (value == null)
|
||||
throw new ArgumentNullException("value");
|
||||
Contract.Ensures(Contract.Result<String>() != null);
|
||||
Contract.EndContractBlock();
|
||||
return ToString(value, 0, value.Length);
|
||||
}
|
||||
|
||||
// Converts an array of bytes into a String.
|
||||
public static String ToString (byte [] value, int startIndex) {
|
||||
if (value == null)
|
||||
throw new ArgumentNullException("value");
|
||||
Contract.Ensures(Contract.Result<String>() != null);
|
||||
Contract.EndContractBlock();
|
||||
return ToString(value, startIndex, value.Length - startIndex);
|
||||
}
|
||||
|
||||
/*==================================ToBoolean===================================
|
||||
**Action: Convert an array of bytes to a boolean value. We treat this array
|
||||
** as if the first 4 bytes were an Int4 an operate on this value.
|
||||
**Returns: True if the Int4 value of the first 4 bytes is non-zero.
|
||||
**Arguments: value -- The byte array
|
||||
** startIndex -- The position within the array.
|
||||
**Exceptions: See ToInt4.
|
||||
==============================================================================*/
|
||||
// Converts an array of bytes into a boolean.
|
||||
public static bool ToBoolean(byte[] value, int startIndex) {
|
||||
if (value==null)
|
||||
throw new ArgumentNullException("value");
|
||||
if (startIndex < 0)
|
||||
throw new ArgumentOutOfRangeException("startIndex", Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum"));
|
||||
if (startIndex > value.Length - 1)
|
||||
throw new ArgumentOutOfRangeException("startIndex", Environment.GetResourceString("ArgumentOutOfRange_Index"));
|
||||
Contract.EndContractBlock();
|
||||
|
||||
return (value[startIndex]==0)?false:true;
|
||||
}*/
|
||||
|
||||
public static int64 DoubleToInt64Bits(double value)
|
||||
{
|
||||
// If we're on a big endian machine, what should this method do? You could argue for
|
||||
// either big endian or little endian, depending on whether you are writing to a file that
|
||||
// should be used by other programs on that processor, or for compatibility across multiple
|
||||
// formats. Because this is ambiguous, we're excluding this from the Portable Library & Win8 Profile.
|
||||
// If we ever run on big endian machines, produce two versions where endianness is specified.
|
||||
|
||||
Contract.Assert(IsLittleEndian, "This method is implemented assuming little endian with an ambiguous spec.");
|
||||
double val = value;
|
||||
return *((int64*)&val);
|
||||
}
|
||||
|
||||
public static double Int64BitsToDouble(int64 value)
|
||||
{
|
||||
// If we're on a big endian machine, what should this method do? You could argue for
|
||||
// either big endian or little endian, depending on whether you are writing to a file that
|
||||
// should be used by other programs on that processor, or for compatibility across multiple
|
||||
// formats. Because this is ambiguous, we're excluding this from the Portable Library & Win8 Profile.
|
||||
// If we ever run on big endian machines, produce two versions where endianness is specified.
|
||||
Contract.Assert(IsLittleEndian, "This method is implemented assuming little endian with an ambiguous spec.");
|
||||
double val = value;
|
||||
return *((double*)&val);
|
||||
}
|
||||
}
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue