From ad92dc50b7cdf7cfe086f21d19442d03a90fd05d Mon Sep 17 00:00:00 2001
From: Mike Buland <eichlan@xagasoft.com>
Date: Wed, 9 May 2007 15:04:31 +0000
Subject: Just a few things re-arranged, moved the new taf/xml systems to the
 inprogress directory, and moved the old xml system in, so it will require
 heavy changes.

---
 src/inprogress/xmlreader.cpp | 267 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 267 insertions(+)
 create mode 100644 src/inprogress/xmlreader.cpp

(limited to 'src/inprogress/xmlreader.cpp')

diff --git a/src/inprogress/xmlreader.cpp b/src/inprogress/xmlreader.cpp
new file mode 100644
index 0000000..bd241cf
--- /dev/null
+++ b/src/inprogress/xmlreader.cpp
@@ -0,0 +1,267 @@
+#include "xmlreader.h"
+
+Bu::XmlReader::XmlReader( Bu::Stream &sIn ) :
+	sIn( sIn )
+{
+}
+
+Bu::XmlReader::~XmlReader()
+{
+}
+
+const char *Bu::XmlReader::lookahead( int nAmnt )
+{
+	if( sBuf.getSize() >= nAmnt )
+		return sBuf.getStr();
+
+	int nNew = nAmnt - sBuf.getSize();
+	char *buf = new char[nNew];
+	sIn.read( buf, nNew );
+	sBuf.append( buf );
+
+	return sBuf.getStr();
+}
+
+void Bu::XmlReader::burn( int nAmnt )
+{
+	if( sBuf.getSize() < nAmnt )
+	{
+		lookahead( nAmnt );
+	}
+
+	//sBuf.remove( nAmnt );
+}
+
+void Bu::XmlReader::checkString( const char *str, int nLen )
+{
+	if( !strncmp( str, lookahead( nLen ), nLen ) )
+	{
+		burn( nLen );
+		return;
+	}
+
+	throw Bu::ExceptionBase("Expected string '%s'", str );
+}
+
+Bu::XmlNode *Bu::XmlReader::read()
+{
+	prolog();
+}
+
+void Bu::XmlReader::prolog()
+{
+	XMLDecl();
+	Misc();
+}
+
+void Bu::XmlReader::XMLDecl()
+{
+	checkString("<?xml", 5 );
+	S();
+	VersionInfo();
+	EncodingDecl();
+	SDDecl();
+	Sq();
+	checkString("?>", 2 );
+}
+
+void Bu::XmlReader::Misc()
+{
+	for(;;)
+	{
+		S();
+		if( !strncmp("<!--", lookahead( 4 ), 4 ) )
+		{
+			Comment();
+		}
+		else if( !strncmp("<?", lookahead( 2 ), 2 ) )
+		{
+			PI();
+		}
+		else
+		{
+			return;
+		}
+	}
+}
+
+void Bu::XmlReader::Comment()
+{
+	checkString("<!--", 4 );
+	for(;;)
+	{
+		unsigned char c = *lookahead(1);
+		if( c == '-' )
+		{
+			if( lookahead(2)[1] == '-' )
+			{
+				checkString("-->", 3 );
+				return;
+			}
+		}
+		burn( 1 );
+	}
+}
+
+void Bu::XmlReader::PI()
+{
+	checkString("<?", 2 );
+	FString sName = Name();
+	printf("PI: %s\n---\n", sName.getStr() );
+	S();
+	for(int j = 0;; j++ )
+	{
+		if( !strncmp( "?>", lookahead(j+2)+j, 2 ) )
+		{
+			burn( j+2 );
+			return;
+		}
+	}
+}
+
+void Bu::XmlReader::S()
+{
+	for( int j = 0;; j++ )
+	{
+		char c = *lookahead( 1 );
+		if( c == 0x20 || c == 0x9 || c == 0xD || c == 0xA )
+			continue;
+		if( j == 0 )
+			throw ExceptionBase("Expected whitespace.");
+		return;
+	}
+}
+
+void Bu::XmlReader::Sq()
+{
+	for(;;)
+	{
+		char c = *lookahead( 1 );
+		if( c == 0x20 || c == 0x9 || c == 0xD || c == 0xA )
+			continue;
+		return;
+	}
+}
+
+void Bu::XmlReader::VersionInfo()
+{
+	try
+	{
+		S();
+		checkString("version", 7 );
+	}
+	catch( ExceptionBase &e )
+	{
+		return;
+	}
+	Eq();
+	Bu::FString ver = AttValue();
+	if( ver != "1.1" )
+		throw ExceptionBase("Currently we only support xml version 1.1\n");
+}
+
+void Bu::XmlReader::Eq()
+{
+	Sq();
+	checkString("=", 1 );
+	Sq();
+}
+
+void Bu::XmlReader::EncodingDecl()
+{
+	S();
+	try
+	{
+		checkString("encoding", 8 );
+	}
+	catch( ExceptionBase &e )
+	{
+		return;
+	}
+
+	Eq();
+	AttValue();
+}
+
+void Bu::XmlReader::SDDecl()
+{
+	S();
+	try
+	{
+		checkString("standalone", 10 );
+	}
+	catch( ExceptionBase &e )
+	{
+		return;
+	}
+
+	Eq();
+	AttValue();
+}
+
+Bu::FString Bu::XmlReader::AttValue()
+{
+	char q = *lookahead(1);
+	if( q == '\"' )
+	{
+		for( int j = 2;; j++ )
+		{
+			if( lookahead(j)[j-1] == '\"' )
+			{
+				Bu::FString ret( lookahead(j)+1, j-2 );
+				burn( j );
+				return ret;
+			}
+		}
+	}
+	else if( q == '\'' )
+	{
+		for( int j = 2;; j++ )
+		{
+			if( lookahead(j)[j-1] == '\'' )
+			{
+				Bu::FString ret( lookahead(j)+1, j-2 );
+				burn( j );
+				return ret;
+			}
+		}
+	}
+
+	throw ExceptionBase("Excpected either \' or \".\n");
+}
+
+Bu::FString Bu::XmlReader::Name()
+{
+	unsigned char c = *lookahead( 1 );
+	if( c != ':' && c != '_' &&
+		(c < 'A' || c > 'Z') &&
+		(c < 'a' || c > 'z') &&
+		(c < 0xC0 || c > 0xD6 ) &&
+		(c < 0xD8 || c > 0xF6 ) &&
+		(c < 0xF8))
+	{
+		throw ExceptionBase("Invalid entity name starting character.");
+	}
+
+	for( int j = 1;; j++ )
+	{
+		unsigned char c = lookahead(j+1)[j];
+		if( isS( c ) )
+		{
+			FString ret( lookahead(j+1), j+1 );
+			burn( j+1 );
+			return ret;
+		}
+		if( c != ':' && c != '_' && c != '-' && c != '.' && c != 0xB7 &&
+			(c < 'A' || c > 'Z') &&
+			(c < 'a' || c > 'z') &&
+			(c < '0' || c > '9') && 
+			(c < 0xC0 || c > 0xD6 ) &&
+			(c < 0xD8 || c > 0xF6 ) &&
+			(c < 0xF8))
+		{
+			throw ExceptionBase("Invalid character in name.");
+		}
+	}
+}
+
-- 
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