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using System;
using System.Xml;
using System.Diagnostics;
using System.Collections;
using System.Collections.Generic;
using System.Threading.Tasks;
namespace System.Xml {
//
// XmlCharCheckingReaderWithNS
//
internal partial class XmlCharCheckingReader : XmlWrappingReader {
public override async Task< bool > ReadAsync() {
switch ( state ) {
case State.Initial:
state = State.Interactive;
if ( base.reader.ReadState == ReadState.Initial ) {
goto case State.Interactive;
}
break;
case State.Error:
return false;
case State.InReadBinary:
await FinishReadBinaryAsync().ConfigureAwait(false);
state = State.Interactive;
goto case State.Interactive;
case State.Interactive:
if ( !await base.reader.ReadAsync().ConfigureAwait(false) ) {
return false;
}
break;
default:
Debug.Assert( false );
return false;
}
XmlNodeType nodeType = base.reader.NodeType;
if ( !checkCharacters ) {
switch ( nodeType ) {
case XmlNodeType.Comment:
if ( ignoreComments ) {
return await ReadAsync().ConfigureAwait(false);
}
break;
case XmlNodeType.Whitespace:
if ( ignoreWhitespace ) {
return await ReadAsync().ConfigureAwait(false);
}
break;
case XmlNodeType.ProcessingInstruction:
if ( ignorePis ) {
return await ReadAsync().ConfigureAwait(false);
}
break;
case XmlNodeType.DocumentType:
if ( dtdProcessing == DtdProcessing.Prohibit ) {
Throw( Res.Xml_DtdIsProhibitedEx, string.Empty );
}
else if ( dtdProcessing == DtdProcessing.Ignore ) {
return await ReadAsync().ConfigureAwait(false);
}
break;
}
return true;
}
else {
switch ( nodeType ) {
case XmlNodeType.Element:
if ( checkCharacters ) {
// check element name
ValidateQName( base.reader.Prefix, base.reader.LocalName );
// check values of attributes
if ( base.reader.MoveToFirstAttribute() ) {
do {
ValidateQName( base.reader.Prefix, base.reader.LocalName );
CheckCharacters( base.reader.Value );
} while ( base.reader.MoveToNextAttribute() );
base.reader.MoveToElement();
}
}
break;
case XmlNodeType.Text:
case XmlNodeType.CDATA:
if ( checkCharacters ) {
CheckCharacters( await base.reader.GetValueAsync().ConfigureAwait(false) );
}
break;
case XmlNodeType.EntityReference:
if ( checkCharacters ) {
// check name
ValidateQName( base.reader.Name );
}
break;
case XmlNodeType.ProcessingInstruction:
if ( ignorePis ) {
return await ReadAsync().ConfigureAwait(false);
}
if ( checkCharacters ) {
ValidateQName( base.reader.Name );
CheckCharacters( base.reader.Value );
}
break;
case XmlNodeType.Comment:
if ( ignoreComments ) {
return await ReadAsync().ConfigureAwait(false);
}
if ( checkCharacters ) {
CheckCharacters( base.reader.Value );
}
break;
case XmlNodeType.DocumentType:
if ( dtdProcessing == DtdProcessing.Prohibit ) {
Throw( Res.Xml_DtdIsProhibitedEx, string.Empty );
}
else if ( dtdProcessing == DtdProcessing.Ignore ) {
return await ReadAsync().ConfigureAwait(false);
}
if ( checkCharacters ) {
ValidateQName( base.reader.Name );
CheckCharacters( base.reader.Value );
string str;
str = base.reader.GetAttribute( "SYSTEM" );
if ( str != null ) {
CheckCharacters( str );
}
str = base.reader.GetAttribute( "PUBLIC" );
if ( str != null ) {
int i;
if ( ( i = xmlCharType.IsPublicId( str ) ) >= 0 ) {
Throw( Res.Xml_InvalidCharacter, XmlException.BuildCharExceptionArgs( str, i ) );
}
}
}
break;
case XmlNodeType.Whitespace:
if ( ignoreWhitespace ) {
return await ReadAsync().ConfigureAwait(false);
}
if ( checkCharacters ) {
CheckWhitespace( await base.reader.GetValueAsync().ConfigureAwait(false) );
}
break;
case XmlNodeType.SignificantWhitespace:
if ( checkCharacters ) {
CheckWhitespace( await base.reader.GetValueAsync().ConfigureAwait(false) );
}
break;
case XmlNodeType.EndElement:
if ( checkCharacters ) {
ValidateQName( base.reader.Prefix, base.reader.LocalName );
}
break;
default:
break;
}
lastNodeType = nodeType;
return true;
}
}
public override async Task< int > ReadContentAsBase64Async( byte[] buffer, int index, int count ) {
if (ReadState != ReadState.Interactive) {
return 0;
}
if ( state != State.InReadBinary ) {
// forward ReadBase64Chunk calls into the base (wrapped) reader if possible, i.e. if it can read binary and we
// should not check characters
if ( base.CanReadBinaryContent && ( !checkCharacters ) ) {
readBinaryHelper = null;
state = State.InReadBinary;
return await base.ReadContentAsBase64Async( buffer, index, count ).ConfigureAwait(false);
}
// the wrapped reader cannot read chunks or we are on an element where we should check characters or ignore white spaces
else {
readBinaryHelper = ReadContentAsBinaryHelper.CreateOrReset( readBinaryHelper, this );
}
}
else {
// forward calls into wrapped reader
if ( readBinaryHelper == null ) {
return await base.ReadContentAsBase64Async( buffer, index, count ).ConfigureAwait(false);
}
}
// turn off InReadBinary state in order to have a normal Read() behavior when called from readBinaryHelper
state = State.Interactive;
// call to the helper
int readCount = await readBinaryHelper.ReadContentAsBase64Async(buffer, index, count).ConfigureAwait(false);
// turn on InReadBinary in again and return
state = State.InReadBinary;
return readCount;
}
public override async Task< int > ReadContentAsBinHexAsync( byte[] buffer, int index, int count ) {
if (ReadState != ReadState.Interactive) {
return 0;
}
if ( state != State.InReadBinary ) {
// forward ReadBinHexChunk calls into the base (wrapped) reader if possible, i.e. if it can read chunks and we
// should not check characters
if ( base.CanReadBinaryContent && ( !checkCharacters ) ) {
readBinaryHelper = null;
state = State.InReadBinary;
return await base.ReadContentAsBinHexAsync( buffer, index, count ).ConfigureAwait(false);
}
// the wrapped reader cannot read chunks or we are on an element where we should check characters or ignore white spaces
else {
readBinaryHelper = ReadContentAsBinaryHelper.CreateOrReset( readBinaryHelper, this );
}
}
else {
// forward calls into wrapped reader
if ( readBinaryHelper == null ) {
return await base.ReadContentAsBinHexAsync( buffer, index, count ).ConfigureAwait(false);
}
}
// turn off InReadBinary state in order to have a normal Read() behavior when called from readBinaryHelper
state = State.Interactive;
// call to the helper
int readCount = await readBinaryHelper.ReadContentAsBinHexAsync(buffer, index, count).ConfigureAwait(false);
// turn on InReadBinary in again and return
state = State.InReadBinary;
return readCount;
}
public override async Task< int > ReadElementContentAsBase64Async( byte[] buffer, int index, int count ) {
// check arguments
if (buffer == null) {
throw new ArgumentNullException("buffer");
}
if (count < 0) {
throw new ArgumentOutOfRangeException("count");
}
if (index < 0) {
throw new ArgumentOutOfRangeException("index");
}
if (buffer.Length - index < count) {
throw new ArgumentOutOfRangeException("count");
}
if (ReadState != ReadState.Interactive) {
return 0;
}
if ( state != State.InReadBinary ) {
// forward ReadBase64Chunk calls into the base (wrapped) reader if possible, i.e. if it can read binary and we
// should not check characters
if ( base.CanReadBinaryContent && ( !checkCharacters ) ) {
readBinaryHelper = null;
state = State.InReadBinary;
return await base.ReadElementContentAsBase64Async( buffer, index, count ).ConfigureAwait(false);
}
// the wrapped reader cannot read chunks or we are on an element where we should check characters or ignore white spaces
else {
readBinaryHelper = ReadContentAsBinaryHelper.CreateOrReset( readBinaryHelper, this );
}
}
else {
// forward calls into wrapped reader
if ( readBinaryHelper == null ) {
return await base.ReadElementContentAsBase64Async( buffer, index, count ).ConfigureAwait(false);
}
}
// turn off InReadBinary state in order to have a normal Read() behavior when called from readBinaryHelper
state = State.Interactive;
// call to the helper
int readCount = await readBinaryHelper.ReadElementContentAsBase64Async(buffer, index, count).ConfigureAwait(false);
// turn on InReadBinary in again and return
state = State.InReadBinary;
return readCount;
}
public override async Task< int > ReadElementContentAsBinHexAsync( byte[] buffer, int index, int count ) {
// check arguments
if (buffer == null) {
throw new ArgumentNullException("buffer");
}
if (count < 0) {
throw new ArgumentOutOfRangeException("count");
}
if (index < 0) {
throw new ArgumentOutOfRangeException("index");
}
if (buffer.Length - index < count) {
throw new ArgumentOutOfRangeException("count");
}
if (ReadState != ReadState.Interactive) {
return 0;
}
if ( state != State.InReadBinary ) {
// forward ReadBinHexChunk calls into the base (wrapped) reader if possible, i.e. if it can read chunks and we
// should not check characters
if ( base.CanReadBinaryContent && ( !checkCharacters ) ) {
readBinaryHelper = null;
state = State.InReadBinary;
return await base.ReadElementContentAsBinHexAsync( buffer, index, count ).ConfigureAwait(false);
}
// the wrapped reader cannot read chunks or we are on an element where we should check characters or ignore white spaces
else {
readBinaryHelper = ReadContentAsBinaryHelper.CreateOrReset( readBinaryHelper, this );
}
}
else {
// forward calls into wrapped reader
if ( readBinaryHelper == null ) {
return await base.ReadElementContentAsBinHexAsync( buffer, index, count ).ConfigureAwait(false);
}
}
// turn off InReadBinary state in order to have a normal Read() behavior when called from readBinaryHelper
state = State.Interactive;
// call to the helper
int readCount = await readBinaryHelper.ReadElementContentAsBinHexAsync(buffer, index, count).ConfigureAwait(false);
// turn on InReadBinary in again and return
state = State.InReadBinary;
return readCount;
}
private async Task FinishReadBinaryAsync() {
state = State.Interactive;
if ( readBinaryHelper != null ) {
await readBinaryHelper.FinishAsync().ConfigureAwait(false);
}
}
}
}
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