Code:
/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / whidbey / NetFXspW7 / ndp / clr / src / BCL / System / Globalization / CharUnicodeInfo.cs / 1 / CharUnicodeInfo.cs
// ==++==
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// ==--==
////////////////////////////////////////////////////////////////////////////
//
// Class: CharacterInfo
//
// Purpose: This class implements a set of methods for retrieving
// character type information. Character type information is
// independent of culture and region.
//
// Date: August 12, 1998
//
////////////////////////////////////////////////////////////////////////////
namespace System.Globalization {
//This class has only static members and therefore doesn't need to be serialized.
using System;
using System.Threading;
using System.Runtime.InteropServices;
using System.Runtime.CompilerServices;
using System.Reflection;
// Only statics, does not need to be marked with the serializable attribute
public sealed class CharUnicodeInfo : System.Object
{
//--------------------------------------------------------------------//
// Internal Information //
//-------------------------------------------------------------------//
//
// Native methods to access the Unicode category data tables in charinfo.nlp.
//
internal const char HIGH_SURROGATE_START = '\ud800';
internal const char HIGH_SURROGATE_END = '\udbff';
internal const char LOW_SURROGATE_START = '\udc00';
internal const char LOW_SURROGATE_END = '\udfff';
internal const int UNICODE_CATEGORY_OFFSET = 0;
internal const int BIDI_CATEGORY_OFFSET = 1;
// The base pointer of the data table
unsafe static byte* m_pDataTable;
// The native pointer to the 12:4:4 index table of the Unicode cateogry data.
unsafe static ushort* m_pCategoryLevel1Index;
unsafe static byte* m_pCategoriesValue;
// The native pointer to the 12:4:4 index table of the Unicode numeric data.
// The value of this index table is an index into the real value table stored in m_pNumericValues.
unsafe static ushort* m_pNumericLevel1Index;
// The numeric value table, which is indexed by m_pNumericLevel1Index.
// Every item contains the value for numeric value.
// unsafe static double* m_pNumericValues;
// To get around the IA64 alignment issue. Our double data is aligned in 8-byte boundary, but loader loads the embeded table starting
// at 4-byte boundary. This cause a alignment issue since double is 8-byte.
unsafe static byte* m_pNumericValues;
// The digit value table, which is indexed by m_pNumericLevel1Index. It shares the same indice as m_pNumericValues.
// Every item contains the value for decimal digit/digit value.
unsafe static DigitValues* m_pDigitValues;
internal const String UNICODE_INFO_FILE_NAME = "charinfo.nlp";
// The starting codepoint for Unicode plane 1. Plane 1 contains 0x010000 ~ 0x01ffff.
internal const int UNICODE_PLANE01_START = 0x10000;
//
// This is the header for the native data table that we load from UNICODE_INFO_FILE_NAME.
//
// Excplicit layout is used here since a syntax like char[16] can not be used in sequential layout.
[StructLayout(LayoutKind.Explicit)]
internal unsafe struct UnicodeDataHeader {
[FieldOffset(0)]
internal char TableName; // WCHAR[16]
[FieldOffset(0x20)]
internal ushort version; // WORD[4]
[FieldOffset(0x28)]
internal uint OffsetToCategoriesIndex; // DWORD
[FieldOffset(0x2c)]
internal uint OffsetToCategoriesValue; // DWORD
[FieldOffset(0x30)]
internal uint OffsetToNumbericIndex; // DWORD
[FieldOffset(0x34)]
internal uint OffsetToDigitValue; // DWORD
[FieldOffset(0x38)]
internal uint OffsetToNumbericValue; // DWORD
}
// NOTE: It's important to specify pack size here, since the size of the structure is 2 bytes. Otherwise,
// the default pack size will be 4.
[StructLayout(LayoutKind.Sequential, Pack=2)]
internal struct DigitValues {
internal sbyte decimalDigit;
internal sbyte digit;
}
//We need to allocate the underlying table that provides us with the information that we
//use. We allocate this once in the class initializer and then we don't need to worry
//about it again.
//
unsafe static CharUnicodeInfo() {
m_pDataTable = GlobalizationAssembly.GetGlobalizationResourceBytePtr(typeof(CharUnicodeInfo).Assembly, UNICODE_INFO_FILE_NAME);
UnicodeDataHeader* mainHeader = (UnicodeDataHeader*)m_pDataTable;
// Set up the native pointer to different part of the tables.
m_pCategoryLevel1Index = (ushort*) (m_pDataTable + mainHeader->OffsetToCategoriesIndex);
m_pCategoriesValue = (byte*) (m_pDataTable + mainHeader->OffsetToCategoriesValue);
m_pNumericLevel1Index = (ushort*) (m_pDataTable + mainHeader->OffsetToNumbericIndex);
m_pNumericValues = (byte*) (m_pDataTable + mainHeader->OffsetToNumbericValue);
m_pDigitValues = (DigitValues*) (m_pDataTable + mainHeader->OffsetToDigitValue);
// Go to native side to make sure the native CharacterInfoTable pointer in the native side is initialized.
nativeInitTable(m_pDataTable);
}
////////////////////////////////////////////////////////////////////////
//
// Define a private ctor so that compiler won't generate a default public ctor for us.
//
////////////////////////////////////////////////////////////////////////
private CharUnicodeInfo() {
}
////////////////////////////////////////////////////////////////////////
//
// Actions:
// Convert the BMP character or surrogate pointed by index to a UTF32 value.
// This is similar to Char.ConvertToUTF32, but the difference is that
// it does not throw exceptions when invalid surrogate characters are passed in.
//
// WARNING: since it doesn't throw an exception it CAN return a value
// in the surrogate range D800-DFFF, which are not legal unicode values.
//
////////////////////////////////////////////////////////////////////////
internal static int InternalConvertToUtf32(String s, int index) {
BCLDebug.Assert(s != null, "s != null");
BCLDebug.Assert(index >= 0 && index < s.Length, "index < s.Length");
if (index < s.Length - 1) {
int temp1 = (int)s[index] - HIGH_SURROGATE_START;
if (temp1 >= 0 && temp1 <= 0x3ff) {
int temp2 = (int)s[index+1] - LOW_SURROGATE_START;
if (temp2 >= 0 && temp2 <= 0x3ff) {
// Convert the surrogate to UTF32 and get the result.
return ((temp1 * 0x400) + temp2 + UNICODE_PLANE01_START);
}
}
}
return ((int)s[index]);
}
////////////////////////////////////////////////////////////////////////
//
// Convert a character or a surrogate pair starting at index of string s
// to UTF32 value.
//
// Parameters:
// s The string
// index The starting index. It can point to a BMP character or
// a surrogate pair.
// len The length of the string.
// charLength [out] If the index points to a BMP char, charLength
// will be 1. If the index points to a surrogate pair,
// charLength will be 2.
//
// WARNING: since it doesn't throw an exception it CAN return a value
// in the surrogate range D800-DFFF, which are not legal unicode values.
//
// Returns:
// The UTF32 value
//
////////////////////////////////////////////////////////////////////////
internal static int InternalConvertToUtf32(String s, int index, out int charLength) {
BCLDebug.Assert(s != null, "s != null");
BCLDebug.Assert(s.Length > 0, "s.Length > 0");
BCLDebug.Assert(index >= 0 && index < s.Length, "index >= 0 && index < s.Length");
charLength = 1;
if (index < s.Length - 1) {
int temp1 = (int)s[index] - HIGH_SURROGATE_START;
if (temp1 >= 0 && temp1 <= 0x3ff) {
int temp2 = (int)s[index+1] - LOW_SURROGATE_START;
if (temp2 >= 0 && temp2 <= 0x3ff) {
// Convert the surrogate to UTF32 and get the result.
charLength++;
return ((temp1 * 0x400) + temp2 + UNICODE_PLANE01_START);
}
}
}
return ((int)s[index]);
}
////////////////////////////////////////////////////////////////////////
//
// IsWhiteSpace
//
// Determines if the given character is a white space character.
//
////////////////////////////////////////////////////////////////////////
internal static bool IsWhiteSpace(String s, int index)
{
BCLDebug.Assert(s != null, "s!=null");
BCLDebug.Assert(index >= 0 && index < s.Length, "index >= 0 && index < s.Length");
UnicodeCategory uc = GetUnicodeCategory(s, index);
// In Unicode 3.0, U+2028 is the only character which is under the category "LineSeparator".
// And U+2029 is th eonly character which is under the category "ParagraphSeparator".
switch (uc) {
case (UnicodeCategory.SpaceSeparator):
case (UnicodeCategory.LineSeparator):
case (UnicodeCategory.ParagraphSeparator):
return (true);
}
return (false);
}
internal static bool IsWhiteSpace(char c)
{
UnicodeCategory uc = GetUnicodeCategory(c);
// In Unicode 3.0, U+2028 is the only character which is under the category "LineSeparator".
// And U+2029 is th eonly character which is under the category "ParagraphSeparator".
switch (uc) {
case (UnicodeCategory.SpaceSeparator):
case (UnicodeCategory.LineSeparator):
case (UnicodeCategory.ParagraphSeparator):
return (true);
}
return (false);
}
//
// This is called by the public char and string, index versions
//
// Note that for ch in the range D800-DFFF we just treat it as any other non-numeric character
//
internal unsafe static double InternalGetNumericValue(int ch) {
BCLDebug.Assert(ch >= 0 && ch <= 0x10ffff, "ch is not in valid Unicode range.");
// Get the level 2 item from the highest 12 bit (8 - 19) of ch.
ushort index = m_pNumericLevel1Index[ch >> 8];
// Get the level 2 WORD offset from the 4 - 7 bit of ch. This provides the base offset of the level 3 table.
// The offset is referred to an float item in m_pNumericFloatData.
// Note that & has the lower precedence than addition, so don't forget the parathesis.
index = m_pNumericLevel1Index[index + ((ch >> 4) & 0x000f)];
byte* pBytePtr = (byte*)&(m_pNumericLevel1Index[index]);
// Get the result from the 0 -3 bit of ch.
#if WIN64
// To get around the IA64 alignment issue. Our double data is aligned in 8-byte boundary, but loader loads the embeded table starting
// at 4-byte boundary. This cause a alignment issue since double is 8-byte.
byte* pSourcePtr = &(m_pNumericValues[pBytePtr[(ch & 0x000f)] * sizeof(double)]);
if (((long)pSourcePtr % 8) != 0) {
// We are not aligned in 8-byte boundary. Do a copy.
double ret;
byte* retPtr = (byte*)&ret;
Buffer.memcpyimpl(pSourcePtr, retPtr, sizeof(double));
return (ret);
}
return (((double*)m_pNumericValues)[pBytePtr[(ch & 0x000f)]]);
#else
return (((double*)m_pNumericValues)[pBytePtr[(ch & 0x000f)]]);
#endif
}
//
// This is called by the public char and string, index versions
//
// Note that for ch in the range D800-DFFF we just treat it as any other non-numeric character
//
internal unsafe static DigitValues* InternalGetDigitValues(int ch) {
BCLDebug.Assert(ch >= 0 && ch <= 0x10ffff, "ch is not in valid Unicode range.");
// Get the level 2 item from the highest 12 bit (8 - 19) of ch.
ushort index = m_pNumericLevel1Index[ch >> 8];
// Get the level 2 WORD offset from the 4 - 7 bit of ch. This provides the base offset of the level 3 table.
// The offset is referred to an float item in m_pNumericFloatData.
// Note that & has the lower precedence than addition, so don't forget the parathesis.
index = m_pNumericLevel1Index[index + ((ch >> 4) & 0x000f)];
byte* pBytePtr = (byte*)&(m_pNumericLevel1Index[index]);
// Get the result from the 0 -3 bit of ch.
return &(m_pDigitValues[pBytePtr[(ch & 0x000f)]]);
}
internal unsafe static sbyte InternalGetDecimalDigitValue(int ch) {
return (InternalGetDigitValues(ch)->decimalDigit);
}
internal unsafe static sbyte InternalGetDigitValue(int ch) {
return (InternalGetDigitValues(ch)->digit);
}
////////////////////////////////////////////////////////////////////////
//
//Returns the numeric value associated with the character c. If the character is a fraction,
// the return value will not be an integer. If the character does not have a numeric value, the return value is -1.
//
//Returns:
// the numeric value for the specified Unicode character. If the character does not have a numeric value, the return value is -1.
//Arguments:
// ch a Unicode character
//Exceptions:
// ArgumentNullException
// ArgumentOutOfRangeException
//
////////////////////////////////////////////////////////////////////////
public static double GetNumericValue(char ch) {
return (InternalGetNumericValue(ch));
}
public static double GetNumericValue(String s, int index) {
if (s == null) {
throw new ArgumentNullException("s");
}
if (index < 0 || index >= s.Length) {
throw new ArgumentOutOfRangeException("index", Environment.GetResourceString("ArgumentOutOfRange_Index"));
}
return (InternalGetNumericValue(InternalConvertToUtf32(s, index)));
}
////////////////////////////////////////////////////////////////////////
//
//Returns the decimal digit value associated with the character c.
//
// The value should be from 0 ~ 9.
// If the character does not have a numeric value, the return value is -1.
// From Unicode.org: Decimal Digits. Digits that can be used to form decimal-radix numbers.
//Returns:
// the decimal digit value for the specified Unicode character. If the character does not have a decimal digit value, the return value is -1.
//Arguments:
// ch a Unicode character
//Exceptions:
// ArgumentNullException
// ArgumentOutOfRangeException
//
////////////////////////////////////////////////////////////////////////
public static int GetDecimalDigitValue(char ch) {
return (InternalGetDecimalDigitValue(ch));
}
public static int GetDecimalDigitValue(String s, int index) {
if (s == null) {
throw new ArgumentNullException("s");
}
if (index < 0 || index >= s.Length) {
throw new ArgumentOutOfRangeException("index", Environment.GetResourceString("ArgumentOutOfRange_Index"));
}
return (InternalGetDecimalDigitValue(InternalConvertToUtf32(s, index)));
}
////////////////////////////////////////////////////////////////////////
//
//Action: Returns the digit value associated with the character c.
// If the character does not have a numeric value, the return value is -1.
// From Unicode.org: If the character represents a digit, not necessarily a decimal digit,
// the value is here. This covers digits which do not form decimal radix forms, such as the compatibility superscript digits.
//
// An example is: U+2460 IRCLED DIGIT ONE. This character has digit value 1, but does not have associcated decimal digit value.
//
//Returns:
// the digit value for the specified Unicode character. If the character does not have a digit value, the return value is -1.
//Arguments:
// ch a Unicode character
//Exceptions:
// ArgumentNullException
// ArgumentOutOfRangeException
//
////////////////////////////////////////////////////////////////////////
public static int GetDigitValue(char ch) {
return (InternalGetDigitValue(ch));
}
public static int GetDigitValue(String s, int index) {
if (s == null) {
throw new ArgumentNullException("s");
}
if (index < 0 || index >= s.Length) {
throw new ArgumentOutOfRangeException("index", Environment.GetResourceString("ArgumentOutOfRange_Index"));
}
return (InternalGetDigitValue(InternalConvertToUtf32(s, index)));
}
public static UnicodeCategory GetUnicodeCategory(char ch)
{
return (InternalGetUnicodeCategory(ch)) ;
}
public static UnicodeCategory GetUnicodeCategory(String s, int index)
{
if (s==null)
throw new ArgumentNullException("s");
if (((uint)index)>=((uint)s.Length)) {
throw new ArgumentOutOfRangeException("index");
}
return InternalGetUnicodeCategory(s, index);
}
internal unsafe static UnicodeCategory InternalGetUnicodeCategory(int ch) {
return ((UnicodeCategory)InternalGetCategoryValue(ch, UNICODE_CATEGORY_OFFSET));
}
////////////////////////////////////////////////////////////////////////
//
//Action: Returns the Unicode Category property for the character c.
//Returns:
// an value in UnicodeCategory enum
//Arguments:
// ch a Unicode character
//Exceptions:
// None
//
//Note that this API will return values for D800-DF00 surrogate halves.
//
////////////////////////////////////////////////////////////////////////
internal unsafe static byte InternalGetCategoryValue(int ch, int offset) {
BCLDebug.Assert(ch >= 0 && ch <= 0x10ffff, "ch is not in valid Unicode range.");
// Get the level 2 item from the highest 12 bit (8 - 19) of ch.
ushort index = m_pCategoryLevel1Index[ch >> 8];
// Get the level 2 WORD offset from the 4 - 7 bit of ch. This provides the base offset of the level 3 table.
// Note that & has the lower precedence than addition, so don't forget the parathesis.
index = m_pCategoryLevel1Index[index + ((ch >> 4) & 0x000f)];
byte* pBytePtr = (byte*)&(m_pCategoryLevel1Index[index]);
// Get the result from the 0 -3 bit of ch.
byte valueIndex = pBytePtr[(ch & 0x000f)];
byte uc = m_pCategoriesValue[valueIndex * 2 + offset];
//
// Make sure that OtherNotAssigned is the last category in UnicodeCategory.
// If that changes, change the following assertion as well.
//
//BCLDebug.Assert(uc >= 0 && uc <= UnicodeCategory.OtherNotAssigned, "Table returns incorrect Unicode category");
return (uc);
}
// internal static BidiCategory GetBidiCategory(char ch) {
// return ((BidiCategory)InternalGetCategoryValue(c, BIDI_CATEGORY_OFFSET));
// }
internal static BidiCategory GetBidiCategory(String s, int index) {
if (s==null)
throw new ArgumentNullException("s");
if (((uint)index)>=((uint)s.Length)) {
throw new ArgumentOutOfRangeException("index");
}
return ((BidiCategory)InternalGetCategoryValue(InternalConvertToUtf32(s, index), BIDI_CATEGORY_OFFSET));
}
////////////////////////////////////////////////////////////////////////
//
//Action: Returns the Unicode Category property for the character c.
//Returns:
// an value in UnicodeCategory enum
//Arguments:
// value a Unicode String
// index Index for the specified string.
//Exceptions:
// None
//
////////////////////////////////////////////////////////////////////////
internal static UnicodeCategory InternalGetUnicodeCategory(String value, int index) {
BCLDebug.Assert(value != null, "value can not be null");
BCLDebug.Assert(index < value.Length, "index < value.Length");
return (InternalGetUnicodeCategory(InternalConvertToUtf32(value, index)));
}
////////////////////////////////////////////////////////////////////////
//
// Get the Unicode category of the character starting at index. If the character is in BMP, charLength will return 1.
// If the character is a valid surrogate pair, charLength will return 2.
//
////////////////////////////////////////////////////////////////////////
internal static UnicodeCategory InternalGetUnicodeCategory(String str, int index, out int charLength) {
BCLDebug.Assert(str != null, "str can not be null");
BCLDebug.Assert(str.Length > 0, "str.Length > 0");;
BCLDebug.Assert(index >= 0 && index < str.Length, "index >= 0 && index < str.Length");
return (InternalGetUnicodeCategory(InternalConvertToUtf32(str, index, out charLength)));
}
internal static bool IsCombiningCategory(UnicodeCategory uc) {
BCLDebug.Assert(uc >= 0, "uc >= 0");
return (
uc == UnicodeCategory.NonSpacingMark ||
uc == UnicodeCategory.SpacingCombiningMark ||
uc == UnicodeCategory.EnclosingMark
);
}
[MethodImplAttribute(MethodImplOptions.InternalCall)]
private unsafe static extern void nativeInitTable(byte* bytePtr);
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// ==++==
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// ==--==
////////////////////////////////////////////////////////////////////////////
//
// Class: CharacterInfo
//
// Purpose: This class implements a set of methods for retrieving
// character type information. Character type information is
// independent of culture and region.
//
// Date: August 12, 1998
//
////////////////////////////////////////////////////////////////////////////
namespace System.Globalization {
//This class has only static members and therefore doesn't need to be serialized.
using System;
using System.Threading;
using System.Runtime.InteropServices;
using System.Runtime.CompilerServices;
using System.Reflection;
// Only statics, does not need to be marked with the serializable attribute
public sealed class CharUnicodeInfo : System.Object
{
//--------------------------------------------------------------------//
// Internal Information //
//-------------------------------------------------------------------//
//
// Native methods to access the Unicode category data tables in charinfo.nlp.
//
internal const char HIGH_SURROGATE_START = '\ud800';
internal const char HIGH_SURROGATE_END = '\udbff';
internal const char LOW_SURROGATE_START = '\udc00';
internal const char LOW_SURROGATE_END = '\udfff';
internal const int UNICODE_CATEGORY_OFFSET = 0;
internal const int BIDI_CATEGORY_OFFSET = 1;
// The base pointer of the data table
unsafe static byte* m_pDataTable;
// The native pointer to the 12:4:4 index table of the Unicode cateogry data.
unsafe static ushort* m_pCategoryLevel1Index;
unsafe static byte* m_pCategoriesValue;
// The native pointer to the 12:4:4 index table of the Unicode numeric data.
// The value of this index table is an index into the real value table stored in m_pNumericValues.
unsafe static ushort* m_pNumericLevel1Index;
// The numeric value table, which is indexed by m_pNumericLevel1Index.
// Every item contains the value for numeric value.
// unsafe static double* m_pNumericValues;
// To get around the IA64 alignment issue. Our double data is aligned in 8-byte boundary, but loader loads the embeded table starting
// at 4-byte boundary. This cause a alignment issue since double is 8-byte.
unsafe static byte* m_pNumericValues;
// The digit value table, which is indexed by m_pNumericLevel1Index. It shares the same indice as m_pNumericValues.
// Every item contains the value for decimal digit/digit value.
unsafe static DigitValues* m_pDigitValues;
internal const String UNICODE_INFO_FILE_NAME = "charinfo.nlp";
// The starting codepoint for Unicode plane 1. Plane 1 contains 0x010000 ~ 0x01ffff.
internal const int UNICODE_PLANE01_START = 0x10000;
//
// This is the header for the native data table that we load from UNICODE_INFO_FILE_NAME.
//
// Excplicit layout is used here since a syntax like char[16] can not be used in sequential layout.
[StructLayout(LayoutKind.Explicit)]
internal unsafe struct UnicodeDataHeader {
[FieldOffset(0)]
internal char TableName; // WCHAR[16]
[FieldOffset(0x20)]
internal ushort version; // WORD[4]
[FieldOffset(0x28)]
internal uint OffsetToCategoriesIndex; // DWORD
[FieldOffset(0x2c)]
internal uint OffsetToCategoriesValue; // DWORD
[FieldOffset(0x30)]
internal uint OffsetToNumbericIndex; // DWORD
[FieldOffset(0x34)]
internal uint OffsetToDigitValue; // DWORD
[FieldOffset(0x38)]
internal uint OffsetToNumbericValue; // DWORD
}
// NOTE: It's important to specify pack size here, since the size of the structure is 2 bytes. Otherwise,
// the default pack size will be 4.
[StructLayout(LayoutKind.Sequential, Pack=2)]
internal struct DigitValues {
internal sbyte decimalDigit;
internal sbyte digit;
}
//We need to allocate the underlying table that provides us with the information that we
//use. We allocate this once in the class initializer and then we don't need to worry
//about it again.
//
unsafe static CharUnicodeInfo() {
m_pDataTable = GlobalizationAssembly.GetGlobalizationResourceBytePtr(typeof(CharUnicodeInfo).Assembly, UNICODE_INFO_FILE_NAME);
UnicodeDataHeader* mainHeader = (UnicodeDataHeader*)m_pDataTable;
// Set up the native pointer to different part of the tables.
m_pCategoryLevel1Index = (ushort*) (m_pDataTable + mainHeader->OffsetToCategoriesIndex);
m_pCategoriesValue = (byte*) (m_pDataTable + mainHeader->OffsetToCategoriesValue);
m_pNumericLevel1Index = (ushort*) (m_pDataTable + mainHeader->OffsetToNumbericIndex);
m_pNumericValues = (byte*) (m_pDataTable + mainHeader->OffsetToNumbericValue);
m_pDigitValues = (DigitValues*) (m_pDataTable + mainHeader->OffsetToDigitValue);
// Go to native side to make sure the native CharacterInfoTable pointer in the native side is initialized.
nativeInitTable(m_pDataTable);
}
////////////////////////////////////////////////////////////////////////
//
// Define a private ctor so that compiler won't generate a default public ctor for us.
//
////////////////////////////////////////////////////////////////////////
private CharUnicodeInfo() {
}
////////////////////////////////////////////////////////////////////////
//
// Actions:
// Convert the BMP character or surrogate pointed by index to a UTF32 value.
// This is similar to Char.ConvertToUTF32, but the difference is that
// it does not throw exceptions when invalid surrogate characters are passed in.
//
// WARNING: since it doesn't throw an exception it CAN return a value
// in the surrogate range D800-DFFF, which are not legal unicode values.
//
////////////////////////////////////////////////////////////////////////
internal static int InternalConvertToUtf32(String s, int index) {
BCLDebug.Assert(s != null, "s != null");
BCLDebug.Assert(index >= 0 && index < s.Length, "index < s.Length");
if (index < s.Length - 1) {
int temp1 = (int)s[index] - HIGH_SURROGATE_START;
if (temp1 >= 0 && temp1 <= 0x3ff) {
int temp2 = (int)s[index+1] - LOW_SURROGATE_START;
if (temp2 >= 0 && temp2 <= 0x3ff) {
// Convert the surrogate to UTF32 and get the result.
return ((temp1 * 0x400) + temp2 + UNICODE_PLANE01_START);
}
}
}
return ((int)s[index]);
}
////////////////////////////////////////////////////////////////////////
//
// Convert a character or a surrogate pair starting at index of string s
// to UTF32 value.
//
// Parameters:
// s The string
// index The starting index. It can point to a BMP character or
// a surrogate pair.
// len The length of the string.
// charLength [out] If the index points to a BMP char, charLength
// will be 1. If the index points to a surrogate pair,
// charLength will be 2.
//
// WARNING: since it doesn't throw an exception it CAN return a value
// in the surrogate range D800-DFFF, which are not legal unicode values.
//
// Returns:
// The UTF32 value
//
////////////////////////////////////////////////////////////////////////
internal static int InternalConvertToUtf32(String s, int index, out int charLength) {
BCLDebug.Assert(s != null, "s != null");
BCLDebug.Assert(s.Length > 0, "s.Length > 0");
BCLDebug.Assert(index >= 0 && index < s.Length, "index >= 0 && index < s.Length");
charLength = 1;
if (index < s.Length - 1) {
int temp1 = (int)s[index] - HIGH_SURROGATE_START;
if (temp1 >= 0 && temp1 <= 0x3ff) {
int temp2 = (int)s[index+1] - LOW_SURROGATE_START;
if (temp2 >= 0 && temp2 <= 0x3ff) {
// Convert the surrogate to UTF32 and get the result.
charLength++;
return ((temp1 * 0x400) + temp2 + UNICODE_PLANE01_START);
}
}
}
return ((int)s[index]);
}
////////////////////////////////////////////////////////////////////////
//
// IsWhiteSpace
//
// Determines if the given character is a white space character.
//
////////////////////////////////////////////////////////////////////////
internal static bool IsWhiteSpace(String s, int index)
{
BCLDebug.Assert(s != null, "s!=null");
BCLDebug.Assert(index >= 0 && index < s.Length, "index >= 0 && index < s.Length");
UnicodeCategory uc = GetUnicodeCategory(s, index);
// In Unicode 3.0, U+2028 is the only character which is under the category "LineSeparator".
// And U+2029 is th eonly character which is under the category "ParagraphSeparator".
switch (uc) {
case (UnicodeCategory.SpaceSeparator):
case (UnicodeCategory.LineSeparator):
case (UnicodeCategory.ParagraphSeparator):
return (true);
}
return (false);
}
internal static bool IsWhiteSpace(char c)
{
UnicodeCategory uc = GetUnicodeCategory(c);
// In Unicode 3.0, U+2028 is the only character which is under the category "LineSeparator".
// And U+2029 is th eonly character which is under the category "ParagraphSeparator".
switch (uc) {
case (UnicodeCategory.SpaceSeparator):
case (UnicodeCategory.LineSeparator):
case (UnicodeCategory.ParagraphSeparator):
return (true);
}
return (false);
}
//
// This is called by the public char and string, index versions
//
// Note that for ch in the range D800-DFFF we just treat it as any other non-numeric character
//
internal unsafe static double InternalGetNumericValue(int ch) {
BCLDebug.Assert(ch >= 0 && ch <= 0x10ffff, "ch is not in valid Unicode range.");
// Get the level 2 item from the highest 12 bit (8 - 19) of ch.
ushort index = m_pNumericLevel1Index[ch >> 8];
// Get the level 2 WORD offset from the 4 - 7 bit of ch. This provides the base offset of the level 3 table.
// The offset is referred to an float item in m_pNumericFloatData.
// Note that & has the lower precedence than addition, so don't forget the parathesis.
index = m_pNumericLevel1Index[index + ((ch >> 4) & 0x000f)];
byte* pBytePtr = (byte*)&(m_pNumericLevel1Index[index]);
// Get the result from the 0 -3 bit of ch.
#if WIN64
// To get around the IA64 alignment issue. Our double data is aligned in 8-byte boundary, but loader loads the embeded table starting
// at 4-byte boundary. This cause a alignment issue since double is 8-byte.
byte* pSourcePtr = &(m_pNumericValues[pBytePtr[(ch & 0x000f)] * sizeof(double)]);
if (((long)pSourcePtr % 8) != 0) {
// We are not aligned in 8-byte boundary. Do a copy.
double ret;
byte* retPtr = (byte*)&ret;
Buffer.memcpyimpl(pSourcePtr, retPtr, sizeof(double));
return (ret);
}
return (((double*)m_pNumericValues)[pBytePtr[(ch & 0x000f)]]);
#else
return (((double*)m_pNumericValues)[pBytePtr[(ch & 0x000f)]]);
#endif
}
//
// This is called by the public char and string, index versions
//
// Note that for ch in the range D800-DFFF we just treat it as any other non-numeric character
//
internal unsafe static DigitValues* InternalGetDigitValues(int ch) {
BCLDebug.Assert(ch >= 0 && ch <= 0x10ffff, "ch is not in valid Unicode range.");
// Get the level 2 item from the highest 12 bit (8 - 19) of ch.
ushort index = m_pNumericLevel1Index[ch >> 8];
// Get the level 2 WORD offset from the 4 - 7 bit of ch. This provides the base offset of the level 3 table.
// The offset is referred to an float item in m_pNumericFloatData.
// Note that & has the lower precedence than addition, so don't forget the parathesis.
index = m_pNumericLevel1Index[index + ((ch >> 4) & 0x000f)];
byte* pBytePtr = (byte*)&(m_pNumericLevel1Index[index]);
// Get the result from the 0 -3 bit of ch.
return &(m_pDigitValues[pBytePtr[(ch & 0x000f)]]);
}
internal unsafe static sbyte InternalGetDecimalDigitValue(int ch) {
return (InternalGetDigitValues(ch)->decimalDigit);
}
internal unsafe static sbyte InternalGetDigitValue(int ch) {
return (InternalGetDigitValues(ch)->digit);
}
////////////////////////////////////////////////////////////////////////
//
//Returns the numeric value associated with the character c. If the character is a fraction,
// the return value will not be an integer. If the character does not have a numeric value, the return value is -1.
//
//Returns:
// the numeric value for the specified Unicode character. If the character does not have a numeric value, the return value is -1.
//Arguments:
// ch a Unicode character
//Exceptions:
// ArgumentNullException
// ArgumentOutOfRangeException
//
////////////////////////////////////////////////////////////////////////
public static double GetNumericValue(char ch) {
return (InternalGetNumericValue(ch));
}
public static double GetNumericValue(String s, int index) {
if (s == null) {
throw new ArgumentNullException("s");
}
if (index < 0 || index >= s.Length) {
throw new ArgumentOutOfRangeException("index", Environment.GetResourceString("ArgumentOutOfRange_Index"));
}
return (InternalGetNumericValue(InternalConvertToUtf32(s, index)));
}
////////////////////////////////////////////////////////////////////////
//
//Returns the decimal digit value associated with the character c.
//
// The value should be from 0 ~ 9.
// If the character does not have a numeric value, the return value is -1.
// From Unicode.org: Decimal Digits. Digits that can be used to form decimal-radix numbers.
//Returns:
// the decimal digit value for the specified Unicode character. If the character does not have a decimal digit value, the return value is -1.
//Arguments:
// ch a Unicode character
//Exceptions:
// ArgumentNullException
// ArgumentOutOfRangeException
//
////////////////////////////////////////////////////////////////////////
public static int GetDecimalDigitValue(char ch) {
return (InternalGetDecimalDigitValue(ch));
}
public static int GetDecimalDigitValue(String s, int index) {
if (s == null) {
throw new ArgumentNullException("s");
}
if (index < 0 || index >= s.Length) {
throw new ArgumentOutOfRangeException("index", Environment.GetResourceString("ArgumentOutOfRange_Index"));
}
return (InternalGetDecimalDigitValue(InternalConvertToUtf32(s, index)));
}
////////////////////////////////////////////////////////////////////////
//
//Action: Returns the digit value associated with the character c.
// If the character does not have a numeric value, the return value is -1.
// From Unicode.org: If the character represents a digit, not necessarily a decimal digit,
// the value is here. This covers digits which do not form decimal radix forms, such as the compatibility superscript digits.
//
// An example is: U+2460 IRCLED DIGIT ONE. This character has digit value 1, but does not have associcated decimal digit value.
//
//Returns:
// the digit value for the specified Unicode character. If the character does not have a digit value, the return value is -1.
//Arguments:
// ch a Unicode character
//Exceptions:
// ArgumentNullException
// ArgumentOutOfRangeException
//
////////////////////////////////////////////////////////////////////////
public static int GetDigitValue(char ch) {
return (InternalGetDigitValue(ch));
}
public static int GetDigitValue(String s, int index) {
if (s == null) {
throw new ArgumentNullException("s");
}
if (index < 0 || index >= s.Length) {
throw new ArgumentOutOfRangeException("index", Environment.GetResourceString("ArgumentOutOfRange_Index"));
}
return (InternalGetDigitValue(InternalConvertToUtf32(s, index)));
}
public static UnicodeCategory GetUnicodeCategory(char ch)
{
return (InternalGetUnicodeCategory(ch)) ;
}
public static UnicodeCategory GetUnicodeCategory(String s, int index)
{
if (s==null)
throw new ArgumentNullException("s");
if (((uint)index)>=((uint)s.Length)) {
throw new ArgumentOutOfRangeException("index");
}
return InternalGetUnicodeCategory(s, index);
}
internal unsafe static UnicodeCategory InternalGetUnicodeCategory(int ch) {
return ((UnicodeCategory)InternalGetCategoryValue(ch, UNICODE_CATEGORY_OFFSET));
}
////////////////////////////////////////////////////////////////////////
//
//Action: Returns the Unicode Category property for the character c.
//Returns:
// an value in UnicodeCategory enum
//Arguments:
// ch a Unicode character
//Exceptions:
// None
//
//Note that this API will return values for D800-DF00 surrogate halves.
//
////////////////////////////////////////////////////////////////////////
internal unsafe static byte InternalGetCategoryValue(int ch, int offset) {
BCLDebug.Assert(ch >= 0 && ch <= 0x10ffff, "ch is not in valid Unicode range.");
// Get the level 2 item from the highest 12 bit (8 - 19) of ch.
ushort index = m_pCategoryLevel1Index[ch >> 8];
// Get the level 2 WORD offset from the 4 - 7 bit of ch. This provides the base offset of the level 3 table.
// Note that & has the lower precedence than addition, so don't forget the parathesis.
index = m_pCategoryLevel1Index[index + ((ch >> 4) & 0x000f)];
byte* pBytePtr = (byte*)&(m_pCategoryLevel1Index[index]);
// Get the result from the 0 -3 bit of ch.
byte valueIndex = pBytePtr[(ch & 0x000f)];
byte uc = m_pCategoriesValue[valueIndex * 2 + offset];
//
// Make sure that OtherNotAssigned is the last category in UnicodeCategory.
// If that changes, change the following assertion as well.
//
//BCLDebug.Assert(uc >= 0 && uc <= UnicodeCategory.OtherNotAssigned, "Table returns incorrect Unicode category");
return (uc);
}
// internal static BidiCategory GetBidiCategory(char ch) {
// return ((BidiCategory)InternalGetCategoryValue(c, BIDI_CATEGORY_OFFSET));
// }
internal static BidiCategory GetBidiCategory(String s, int index) {
if (s==null)
throw new ArgumentNullException("s");
if (((uint)index)>=((uint)s.Length)) {
throw new ArgumentOutOfRangeException("index");
}
return ((BidiCategory)InternalGetCategoryValue(InternalConvertToUtf32(s, index), BIDI_CATEGORY_OFFSET));
}
////////////////////////////////////////////////////////////////////////
//
//Action: Returns the Unicode Category property for the character c.
//Returns:
// an value in UnicodeCategory enum
//Arguments:
// value a Unicode String
// index Index for the specified string.
//Exceptions:
// None
//
////////////////////////////////////////////////////////////////////////
internal static UnicodeCategory InternalGetUnicodeCategory(String value, int index) {
BCLDebug.Assert(value != null, "value can not be null");
BCLDebug.Assert(index < value.Length, "index < value.Length");
return (InternalGetUnicodeCategory(InternalConvertToUtf32(value, index)));
}
////////////////////////////////////////////////////////////////////////
//
// Get the Unicode category of the character starting at index. If the character is in BMP, charLength will return 1.
// If the character is a valid surrogate pair, charLength will return 2.
//
////////////////////////////////////////////////////////////////////////
internal static UnicodeCategory InternalGetUnicodeCategory(String str, int index, out int charLength) {
BCLDebug.Assert(str != null, "str can not be null");
BCLDebug.Assert(str.Length > 0, "str.Length > 0");;
BCLDebug.Assert(index >= 0 && index < str.Length, "index >= 0 && index < str.Length");
return (InternalGetUnicodeCategory(InternalConvertToUtf32(str, index, out charLength)));
}
internal static bool IsCombiningCategory(UnicodeCategory uc) {
BCLDebug.Assert(uc >= 0, "uc >= 0");
return (
uc == UnicodeCategory.NonSpacingMark ||
uc == UnicodeCategory.SpacingCombiningMark ||
uc == UnicodeCategory.EnclosingMark
);
}
[MethodImplAttribute(MethodImplOptions.InternalCall)]
private unsafe static extern void nativeInitTable(byte* bytePtr);
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- XmlArrayItemAttribute.cs
- WpfPayload.cs
- StreamWriter.cs
- ScriptReference.cs
- EndpointIdentityExtension.cs
- XmlArrayItemAttributes.cs
- SqlXmlStorage.cs
- ProcessHostMapPath.cs
- CodeRegionDirective.cs
- VirtualPathUtility.cs
- DataObject.cs
- AccessDataSourceDesigner.cs
- DeclarativeCatalogPart.cs
- Literal.cs
- CompoundFileStorageReference.cs
- BooleanAnimationBase.cs
- SqlNotificationRequest.cs
- WorkflowDesigner.cs
- PointAnimationClockResource.cs
- TextBreakpoint.cs
- TextProviderWrapper.cs
- ResourceDescriptionAttribute.cs
- DecimalAnimationBase.cs
- Thickness.cs
- XsltInput.cs
- DoubleAnimationBase.cs
- HtmlTableCell.cs
- Utils.cs
- IsolatedStoragePermission.cs
- PrinterResolution.cs
- TypeBrowser.xaml.cs
- EventLogPermission.cs
- HttpServerVarsCollection.cs
- DictionarySectionHandler.cs
- UpnEndpointIdentity.cs
- DictionaryGlobals.cs
- SafeRightsManagementEnvironmentHandle.cs
- TypeConverterHelper.cs
- KeyFrames.cs
- SignedXmlDebugLog.cs
- TitleStyle.cs
- MSHTMLHost.cs
- Label.cs
- ProviderCommandInfoUtils.cs
- VisualStyleRenderer.cs
- IItemContainerGenerator.cs
- QueryResult.cs
- MessageRpc.cs
- InputBindingCollection.cs
- Debug.cs
- ContextMenuStrip.cs
- LOSFormatter.cs
- IOThreadScheduler.cs
- ComponentCollection.cs
- SqlCharStream.cs
- prompt.cs
- ImageField.cs
- ExtenderProvidedPropertyAttribute.cs
- LeafCellTreeNode.cs
- Pair.cs
- TrustSection.cs
- NullableDoubleMinMaxAggregationOperator.cs
- DataGridParentRows.cs
- StaticTextPointer.cs
- TypedDataSetSchemaImporterExtension.cs
- CachedFontFamily.cs
- Listbox.cs
- EncoderNLS.cs
- Internal.cs
- StrokeCollectionDefaultValueFactory.cs
- UiaCoreTypesApi.cs
- rsa.cs
- MeshGeometry3D.cs
- StylusPlugin.cs
- XmlWriterSettings.cs
- StateManagedCollection.cs
- SafeHandles.cs
- FixedPage.cs
- IntegerValidator.cs
- CodeGeneratorOptions.cs
- SelectionHighlightInfo.cs
- Range.cs
- WebRequest.cs
- PresentationAppDomainManager.cs
- OrderedDictionary.cs
- MimeTypePropertyAttribute.cs
- NameValueConfigurationElement.cs
- KeyValueInternalCollection.cs
- WebPageTraceListener.cs
- Container.cs
- PropertyTabAttribute.cs
- TypeReference.cs
- UpdatePanelTrigger.cs
- ProviderConnectionPointCollection.cs
- CoTaskMemUnicodeSafeHandle.cs
- xmlfixedPageInfo.cs
- IgnoreFileBuildProvider.cs
- PointIndependentAnimationStorage.cs
- GroupQuery.cs
- QueryResults.cs