Added XML pretty-printer.

[stg.git] / projects / sgconf / xml.cpp

diff --git a/projects/sgconf/xml.cpp b/projects/sgconf/xml.cpp
new file mode 100644 (file)
index 0000000..9e1d8f8
--- /dev/null
+++ b/projects/sgconf/xml.cpp
@@ -0,0 +1,66 @@
+#include "xml.h"
+
+#include <expat.h>
+
+namespace
+{
+
+struct ParserState
+{
+size_t level;
+};
+
+std::string Indent(size_t size)
+{
+return std::string(level * 4, ' ');
+}
+
+std::string PrintAttr(const char ** attr)
+{
+std::string res;
+if (attr == NULL)
+    return res;
+while (*attr)
+    {
+    if (*(attr + 1) == NULL)
+        return res;
+    res += std::string(" ") + *attr + "=\"" + *(attr + 1) + "\"";
+    ++attr; ++attr;
+    }
+return res;
+}
+
+void Start(void * data, const char * el, const char ** attr)
+{
+ParserState * state = static_cast<ParserState *>(data);
+if (el != NULL)
+    std::cout << Indent(state->level) << "<" << el << PrintAttrs(attr) << ">\n";
+++state->level;
+}
+
+void End(void * data, const char * el)
+{
+ParserState * state = static_cast<ParserState *>(data);
+if (el != NULL)
+    std::cout << Indent(state->level) << "</" << el << ">\n";
+--state->level;
+}
+
+}
+
+void SGCONF::PrintXML(const std::string& xml)
+{
+ParserState state = { 0 };
+
+XML_Parser parser = XML_ParserCreate(NULL);
+XML_ParserReset(parser, NULL);
+XML_SetElementHandler(parser, Start, End);
+XML_SetUserData(parser, &state);
+
+if (XML_Parse(parser, xml.c_str(), xml.length(), true) == XML_STATUS_ERROR)
+    std::cerr << "XML parse error at line " << XML_GetCurrentLineNumber(sc->parser)
+              << ": '" << XML_ErrorString(XML_GetErrorCode(sc->parser)) << "'"
+              << std::endl;
+
+XML_ParserFree(parser);
+}