Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / whidbey / netfxsp / ndp / fx / src / Xml / System / Xml / XmlComplianceUtil.cs / 1 / XmlComplianceUtil.cs
//------------------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// [....]
//-----------------------------------------------------------------------------
using System;
using System.IO;
namespace System.Xml {
using System.Text;
internal static class XmlComplianceUtil {
// Replaces \r\n, \n, \r and \t with single space (0x20) and then removes spaces
// at the beggining and and the end of the string and replaces sequences of spaces
// with a single space.
public static string NonCDataNormalize( string value ) {
int len = value.Length;
if ( len <= 0 ) {
return string.Empty;
}
int startPos = 0;
StringBuilder norValue = null;
XmlCharType xmlCharType = XmlCharType.Instance;
while ( xmlCharType.IsWhiteSpace( value[startPos] ) ) {
startPos++;
if ( startPos == len ) {
return " ";
}
}
int i = startPos;
while ( i < len ) {
if ( !xmlCharType.IsWhiteSpace( value[i] ) ) {
i++;
continue;
}
int j = i + 1;
while ( j < len && xmlCharType.IsWhiteSpace( value[j] ) ) {
j++;
}
if ( j == len ) {
if ( norValue == null ) {
return value.Substring( startPos, i - startPos );
}
else {
norValue.Append( value, startPos, i - startPos );
return norValue.ToString();
}
}
if (j > i + 1 || value[i] != 0x20 ) {
if ( norValue == null ) {
norValue = new StringBuilder( len );
}
norValue.Append( value, startPos, i - startPos );
norValue.Append( (char)0x20 );
startPos = j;
i = j;
}
else {
i++;
}
}
if ( norValue != null ) {
if ( startPos < i ) {
norValue.Append( value, startPos, i - startPos );
}
return norValue.ToString();
}
else {
if ( startPos > 0 ) {
return value.Substring( startPos, len - startPos );
}
else {
return value;
}
}
}
// Replaces \r\n, \n, \r and \t with single space (0x20)
public static string CDataNormalize( string value ) {
int len = value.Length;
if ( len <= 0 ) {
return string.Empty;
}
int i = 0;
int startPos = 0;
StringBuilder norValue = null;
while ( i < len ) {
char ch = value[i];
if ( ch >= 0x20 || ( ch != 0x9 && ch != 0xA && ch != 0xD ) ) {
i++;
continue;
}
if ( norValue == null ) {
norValue = new StringBuilder( len );
}
if ( startPos < i ) {
norValue.Append( value, startPos, i - startPos );
}
norValue.Append( (char)0x20 );
if ( ch == 0xD && ( i+1 < len && value[i+1] == 0xA ) ) {
i += 2;
}
else {
i++;
}
startPos = i;
}
if ( norValue == null ) {
return value;
}
else {
if ( i > startPos ) {
norValue.Append(value, startPos, i-startPos);
}
return norValue.ToString();
}
}
// StripSpaces removes spaces at the beginning and at the end of the value and replaces sequences of spaces with a single space
public static string StripSpaces( string value ) {
int len = value.Length;
if ( len <= 0 ) {
return string.Empty;
}
int startPos = 0;
StringBuilder norValue = null;
while ( value[startPos] == 0x20 ) {
startPos++;
if ( startPos == len ) {
return " ";
}
}
int i;
for ( i = startPos; i < len; i++ ) {
if ( value[i] == 0x20 ) {
int j = i + 1;
while ( j < len && value[j] == 0x20 ) {
j++;
}
if ( j == len ) {
if ( norValue == null ) {
return value.Substring( startPos, i - startPos );
}
else {
norValue.Append( value, startPos, i - startPos );
return norValue.ToString();
}
}
if ( j > i + 1 ) {
if ( norValue == null ) {
norValue = new StringBuilder( len );
}
norValue.Append( value, startPos, i - startPos + 1 );
startPos = j;
i = j - 1;
}
}
}
if ( norValue == null ) {
return ( startPos == 0 ) ? value : value.Substring( startPos, len - startPos );
}
else {
if ( i > startPos ) {
norValue.Append( value, startPos, i - startPos );
}
return norValue.ToString();
}
}
// StripSpaces removes spaces at the beginning and at the end of the value and replaces sequences of spaces with a single space
public static void StripSpaces( char[] value, int index, ref int len ) {
if ( len <= 0 ) {
return;
}
int startPos = index;
int endPos = index + len;
while ( value[startPos] == 0x20 ) {
startPos++;
if ( startPos == endPos ) {
len = 1;
return;
}
}
int offset = startPos - index;
int i;
for ( i = startPos; i < endPos; i++ ) {
char ch;
if ( ( ch = value[i] ) == 0x20 ) {
int j = i + 1;
while ( j < endPos && value[j] == 0x20 ) {
j++;
}
if ( j == endPos ) {
offset += ( j - i );
break;
}
if ( j > i+1 ) {
offset += ( j - i - 1 );
i = j - 1;
}
}
value[i-offset] = ch;
}
len -= offset;
}
public static bool IsValidLanguageID( char[] value, int startPos, int length ) {
int len = length;
if ( len < 2 ) {
return false;
}
bool fSeenLetter = false;
int i = startPos;
XmlCharType xmlCharType = XmlCharType.Instance;
char ch = value[i];
if ( xmlCharType.IsLetter(ch) ) {
if ( xmlCharType.IsLetter( value[++i] ) ) {
if ( len == 2 ) {
return true;
}
len--;
i++;
}
else if ( ('I' != ch && 'i' != ch ) && ( 'X' != ch && 'x' != ch ) ) { //IANA or custom Code
return false;
}
if ( value[i] != '-' ) {
return false;
}
len -= 2;
while ( len-- > 0 ) {
ch = value[++i];
if ( xmlCharType.IsLetter( ch ) ) {
fSeenLetter = true;
}
else if ( ch == '-' && fSeenLetter ) {
fSeenLetter = false;
}
else {
return false;
}
}
if ( fSeenLetter ) {
return true;
}
}
return false;
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//------------------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// [....]
//-----------------------------------------------------------------------------
using System;
using System.IO;
namespace System.Xml {
using System.Text;
internal static class XmlComplianceUtil {
// Replaces \r\n, \n, \r and \t with single space (0x20) and then removes spaces
// at the beggining and and the end of the string and replaces sequences of spaces
// with a single space.
public static string NonCDataNormalize( string value ) {
int len = value.Length;
if ( len <= 0 ) {
return string.Empty;
}
int startPos = 0;
StringBuilder norValue = null;
XmlCharType xmlCharType = XmlCharType.Instance;
while ( xmlCharType.IsWhiteSpace( value[startPos] ) ) {
startPos++;
if ( startPos == len ) {
return " ";
}
}
int i = startPos;
while ( i < len ) {
if ( !xmlCharType.IsWhiteSpace( value[i] ) ) {
i++;
continue;
}
int j = i + 1;
while ( j < len && xmlCharType.IsWhiteSpace( value[j] ) ) {
j++;
}
if ( j == len ) {
if ( norValue == null ) {
return value.Substring( startPos, i - startPos );
}
else {
norValue.Append( value, startPos, i - startPos );
return norValue.ToString();
}
}
if (j > i + 1 || value[i] != 0x20 ) {
if ( norValue == null ) {
norValue = new StringBuilder( len );
}
norValue.Append( value, startPos, i - startPos );
norValue.Append( (char)0x20 );
startPos = j;
i = j;
}
else {
i++;
}
}
if ( norValue != null ) {
if ( startPos < i ) {
norValue.Append( value, startPos, i - startPos );
}
return norValue.ToString();
}
else {
if ( startPos > 0 ) {
return value.Substring( startPos, len - startPos );
}
else {
return value;
}
}
}
// Replaces \r\n, \n, \r and \t with single space (0x20)
public static string CDataNormalize( string value ) {
int len = value.Length;
if ( len <= 0 ) {
return string.Empty;
}
int i = 0;
int startPos = 0;
StringBuilder norValue = null;
while ( i < len ) {
char ch = value[i];
if ( ch >= 0x20 || ( ch != 0x9 && ch != 0xA && ch != 0xD ) ) {
i++;
continue;
}
if ( norValue == null ) {
norValue = new StringBuilder( len );
}
if ( startPos < i ) {
norValue.Append( value, startPos, i - startPos );
}
norValue.Append( (char)0x20 );
if ( ch == 0xD && ( i+1 < len && value[i+1] == 0xA ) ) {
i += 2;
}
else {
i++;
}
startPos = i;
}
if ( norValue == null ) {
return value;
}
else {
if ( i > startPos ) {
norValue.Append(value, startPos, i-startPos);
}
return norValue.ToString();
}
}
// StripSpaces removes spaces at the beginning and at the end of the value and replaces sequences of spaces with a single space
public static string StripSpaces( string value ) {
int len = value.Length;
if ( len <= 0 ) {
return string.Empty;
}
int startPos = 0;
StringBuilder norValue = null;
while ( value[startPos] == 0x20 ) {
startPos++;
if ( startPos == len ) {
return " ";
}
}
int i;
for ( i = startPos; i < len; i++ ) {
if ( value[i] == 0x20 ) {
int j = i + 1;
while ( j < len && value[j] == 0x20 ) {
j++;
}
if ( j == len ) {
if ( norValue == null ) {
return value.Substring( startPos, i - startPos );
}
else {
norValue.Append( value, startPos, i - startPos );
return norValue.ToString();
}
}
if ( j > i + 1 ) {
if ( norValue == null ) {
norValue = new StringBuilder( len );
}
norValue.Append( value, startPos, i - startPos + 1 );
startPos = j;
i = j - 1;
}
}
}
if ( norValue == null ) {
return ( startPos == 0 ) ? value : value.Substring( startPos, len - startPos );
}
else {
if ( i > startPos ) {
norValue.Append( value, startPos, i - startPos );
}
return norValue.ToString();
}
}
// StripSpaces removes spaces at the beginning and at the end of the value and replaces sequences of spaces with a single space
public static void StripSpaces( char[] value, int index, ref int len ) {
if ( len <= 0 ) {
return;
}
int startPos = index;
int endPos = index + len;
while ( value[startPos] == 0x20 ) {
startPos++;
if ( startPos == endPos ) {
len = 1;
return;
}
}
int offset = startPos - index;
int i;
for ( i = startPos; i < endPos; i++ ) {
char ch;
if ( ( ch = value[i] ) == 0x20 ) {
int j = i + 1;
while ( j < endPos && value[j] == 0x20 ) {
j++;
}
if ( j == endPos ) {
offset += ( j - i );
break;
}
if ( j > i+1 ) {
offset += ( j - i - 1 );
i = j - 1;
}
}
value[i-offset] = ch;
}
len -= offset;
}
public static bool IsValidLanguageID( char[] value, int startPos, int length ) {
int len = length;
if ( len < 2 ) {
return false;
}
bool fSeenLetter = false;
int i = startPos;
XmlCharType xmlCharType = XmlCharType.Instance;
char ch = value[i];
if ( xmlCharType.IsLetter(ch) ) {
if ( xmlCharType.IsLetter( value[++i] ) ) {
if ( len == 2 ) {
return true;
}
len--;
i++;
}
else if ( ('I' != ch && 'i' != ch ) && ( 'X' != ch && 'x' != ch ) ) { //IANA or custom Code
return false;
}
if ( value[i] != '-' ) {
return false;
}
len -= 2;
while ( len-- > 0 ) {
ch = value[++i];
if ( xmlCharType.IsLetter( ch ) ) {
fSeenLetter = true;
}
else if ( ch == '-' && fSeenLetter ) {
fSeenLetter = false;
}
else {
return false;
}
}
if ( fSeenLetter ) {
return true;
}
}
return false;
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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