From 0cf833840b19e603f480dead5ca211f947503f9b Mon Sep 17 00:00:00 2001
From: Thomas Schmucker <ts@its1.de>
Date: Sun, 9 Mar 2025 22:26:25 +0100
Subject: Initial commit

---
 src/xml.cpp      | 75 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 src/xml_test.cpp | 58 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 133 insertions(+)
 create mode 100644 src/xml.cpp
 create mode 100644 src/xml_test.cpp

(limited to 'src')

diff --git a/src/xml.cpp b/src/xml.cpp
new file mode 100644
index 0000000..44b423a
--- /dev/null
+++ b/src/xml.cpp
@@ -0,0 +1,75 @@
+// Standard C++
+#include <memory>
+#include <sstream>
+
+// Projekt
+#include "xml.hpp"
+
+// Expat XML Parser
+#define XML_STATIC		// force static linkage
+#include "expat.h"
+
+using namespace std;
+
+void
+XML::parse(istream& in)
+{
+	unique_ptr<XML_ParserStruct, decltype(&XML_ParserFree)> parser(XML_ParserCreate(nullptr), XML_ParserFree);
+
+	// setup expat
+	XML_SetUserData(parser.get(), this);
+	XML_SetElementHandler(parser.get(), tag_start, tag_end);
+	XML_SetCdataSectionHandler(parser.get(), cdata_start, cdata_end);
+	XML_SetCharacterDataHandler(parser.get(), data);
+
+	char buffer[2048];
+	for ( bool done = false; !done ; ) {
+		in.read(buffer, sizeof buffer);
+		done = (in.gcount() < sizeof buffer);
+
+		if ( XML_Parse(parser.get(), buffer, static_cast<int>(in.gcount()), done) != XML_STATUS_OK ) {
+			stringstream msg;
+
+			msg << XML_ErrorString(XML_GetErrorCode(parser.get()));
+			msg << " in line " << XML_GetCurrentLineNumber(parser.get());
+
+			throw runtime_error( msg.str() );
+		}
+	}
+}
+
+void
+XML::tag_start(void* me, const char* name, const char* attr[])
+{
+	vector<pair<string, string>> attr_temp;
+
+	for ( size_t i = 0; attr[i]; i += 2 )
+		attr_temp.push_back( make_pair<string, string>(attr[i], attr[i+1]) );
+
+	reinterpret_cast<XML*>(me)->handle_start(name, attr_temp);
+}
+
+void
+XML::tag_end(void* me, const char* name)
+{
+	reinterpret_cast<XML*>(me)->handle_end(name);
+}
+
+void
+XML::cdata_start(void* me)
+{
+	reinterpret_cast<XML*>(me)->handle_cdata_start();
+}
+
+void
+XML::cdata_end(void* me)
+{
+	reinterpret_cast<XML*>(me)->handle_cdata_end();
+}
+
+void
+XML::data(void* me, const char* dat, int len)
+{
+	reinterpret_cast<XML*>(me)->handle_data(vector<char>(dat, dat+len));
+}
+
diff --git a/src/xml_test.cpp b/src/xml_test.cpp
new file mode 100644
index 0000000..0af5b51
--- /dev/null
+++ b/src/xml_test.cpp
@@ -0,0 +1,58 @@
+#include <iostream>
+#include <string>
+using namespace std;
+
+#include "xml.hpp"
+
+class MyXML : public XML {
+	public:
+		explicit MyXML(ostream& out, size_t indent = 4)
+			: pout_(&out)
+			, depth_(0)
+			, indent_(indent)
+		{
+		}
+
+	protected:
+		void handle_start(const string& name, const vector<pair<string, string>>& attr)
+		{
+			*pout_ << string(depth_++ * indent_, ' ')
+			       << "<" << name;
+
+			auto it = cbegin(attr);
+			auto end = cend(attr);
+			if ( it != end ) {
+				*pout_ << " " << it->first << "=\"" << it->second << "\"";
+
+				++it;	// skip first Element
+				for ( ; it != end; ++it )
+					*pout_ << ",  " << it->first << "=\"" << it->second << "\"";
+			}
+
+			*pout_ << ">" << endl;
+		}
+
+		void handle_end(const string& name)
+		{
+			*pout_ << string(--depth_ * indent_, ' ')
+			       << "</" << name << ">"
+			       << endl;
+		}
+
+	private:
+		ostream* pout_;
+		size_t depth_;
+		size_t indent_;
+};
+
+int
+main()
+{
+	try {
+		MyXML myxml(cout);
+		myxml.parse(cin);
+	}
+	catch ( exception& e ) {
+		cerr << "Fehler: " << e.what() << endl;
+	}
+}
-- 
cgit v1.3