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From j...@apache.org
Subject [35/51] [abbrv] [partial] incubator-corinthia git commit: added libxml2 2.9.2 from xmlsoft.org
Date Mon, 23 Mar 2015 10:46:28 GMT
http://git-wip-us.apache.org/repos/asf/incubator-corinthia/blob/e181189e/DocFormats/platform/3rdparty/libxml2-2.9.2/debugXML.c
----------------------------------------------------------------------
diff --git a/DocFormats/platform/3rdparty/libxml2-2.9.2/debugXML.c b/DocFormats/platform/3rdparty/libxml2-2.9.2/debugXML.c
new file mode 100644
index 0000000..b05fdff
--- /dev/null
+++ b/DocFormats/platform/3rdparty/libxml2-2.9.2/debugXML.c
@@ -0,0 +1,3428 @@
+/*
+ * debugXML.c : This is a set of routines used for debugging the tree
+ *              produced by the XML parser.
+ *
+ * See Copyright for the status of this software.
+ *
+ * Daniel Veillard <daniel@veillard.com>
+ */
+
+#define IN_LIBXML
+#include "libxml.h"
+#ifdef LIBXML_DEBUG_ENABLED
+
+#include <string.h>
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
+#include <libxml/xmlmemory.h>
+#include <libxml/tree.h>
+#include <libxml/parser.h>
+#include <libxml/parserInternals.h>
+#include <libxml/valid.h>
+#include <libxml/debugXML.h>
+#include <libxml/HTMLtree.h>
+#include <libxml/HTMLparser.h>
+#include <libxml/xmlerror.h>
+#include <libxml/globals.h>
+#include <libxml/xpathInternals.h>
+#include <libxml/uri.h>
+#ifdef LIBXML_SCHEMAS_ENABLED
+#include <libxml/relaxng.h>
+#endif
+
+#define DUMP_TEXT_TYPE 1
+
+typedef struct _xmlDebugCtxt xmlDebugCtxt;
+typedef xmlDebugCtxt *xmlDebugCtxtPtr;
+struct _xmlDebugCtxt {
+    FILE *output;               /* the output file */
+    char shift[101];            /* used for indenting */
+    int depth;                  /* current depth */
+    xmlDocPtr doc;              /* current document */
+    xmlNodePtr node;		/* current node */
+    xmlDictPtr dict;		/* the doc dictionnary */
+    int check;                  /* do just checkings */
+    int errors;                 /* number of errors found */
+    int nodict;			/* if the document has no dictionnary */
+    int options;		/* options */
+};
+
+static void xmlCtxtDumpNodeList(xmlDebugCtxtPtr ctxt, xmlNodePtr node);
+
+static void
+xmlCtxtDumpInitCtxt(xmlDebugCtxtPtr ctxt)
+{
+    int i;
+
+    ctxt->depth = 0;
+    ctxt->check = 0;
+    ctxt->errors = 0;
+    ctxt->output = stdout;
+    ctxt->doc = NULL;
+    ctxt->node = NULL;
+    ctxt->dict = NULL;
+    ctxt->nodict = 0;
+    ctxt->options = 0;
+    for (i = 0; i < 100; i++)
+        ctxt->shift[i] = ' ';
+    ctxt->shift[100] = 0;
+}
+
+static void
+xmlCtxtDumpCleanCtxt(xmlDebugCtxtPtr ctxt ATTRIBUTE_UNUSED)
+{
+ /* remove the ATTRIBUTE_UNUSED when this is added */
+}
+
+/**
+ * xmlNsCheckScope:
+ * @node: the node
+ * @ns: the namespace node
+ *
+ * Check that a given namespace is in scope on a node.
+ *
+ * Returns 1 if in scope, -1 in case of argument error,
+ *         -2 if the namespace is not in scope, and -3 if not on
+ *         an ancestor node.
+ */
+static int
+xmlNsCheckScope(xmlNodePtr node, xmlNsPtr ns)
+{
+    xmlNsPtr cur;
+
+    if ((node == NULL) || (ns == NULL))
+        return(-1);
+
+    if ((node->type != XML_ELEMENT_NODE) &&
+	(node->type != XML_ATTRIBUTE_NODE) &&
+	(node->type != XML_DOCUMENT_NODE) &&
+	(node->type != XML_TEXT_NODE) &&
+	(node->type != XML_HTML_DOCUMENT_NODE) &&
+	(node->type != XML_XINCLUDE_START))
+	return(-2);
+
+    while ((node != NULL) &&
+           ((node->type == XML_ELEMENT_NODE) ||
+            (node->type == XML_ATTRIBUTE_NODE) ||
+            (node->type == XML_TEXT_NODE) ||
+	    (node->type == XML_XINCLUDE_START))) {
+	if ((node->type == XML_ELEMENT_NODE) ||
+	    (node->type == XML_XINCLUDE_START)) {
+	    cur = node->nsDef;
+	    while (cur != NULL) {
+	        if (cur == ns)
+		    return(1);
+		if (xmlStrEqual(cur->prefix, ns->prefix))
+		    return(-2);
+		cur = cur->next;
+	    }
+	}
+	node = node->parent;
+    }
+    /* the xml namespace may be declared on the document node */
+    if ((node != NULL) &&
+        ((node->type == XML_DOCUMENT_NODE) ||
+	 (node->type == XML_HTML_DOCUMENT_NODE))) {
+	 xmlNsPtr oldNs = ((xmlDocPtr) node)->oldNs;
+	 if (oldNs == ns)
+	     return(1);
+    }
+    return(-3);
+}
+
+static void
+xmlCtxtDumpSpaces(xmlDebugCtxtPtr ctxt)
+{
+    if (ctxt->check)
+        return;
+    if ((ctxt->output != NULL) && (ctxt->depth > 0)) {
+        if (ctxt->depth < 50)
+            fprintf(ctxt->output, "%s", &ctxt->shift[100 - 2 * ctxt->depth]);
+        else
+            fprintf(ctxt->output, "%s", ctxt->shift);
+    }
+}
+
+/**
+ * xmlDebugErr:
+ * @ctxt:  a debug context
+ * @error:  the error code
+ *
+ * Handle a debug error.
+ */
+static void
+xmlDebugErr(xmlDebugCtxtPtr ctxt, int error, const char *msg)
+{
+    ctxt->errors++;
+    __xmlRaiseError(NULL, NULL, NULL,
+		    NULL, ctxt->node, XML_FROM_CHECK,
+		    error, XML_ERR_ERROR, NULL, 0,
+		    NULL, NULL, NULL, 0, 0,
+		    "%s", msg);
+}
+static void
+xmlDebugErr2(xmlDebugCtxtPtr ctxt, int error, const char *msg, int extra)
+{
+    ctxt->errors++;
+    __xmlRaiseError(NULL, NULL, NULL,
+		    NULL, ctxt->node, XML_FROM_CHECK,
+		    error, XML_ERR_ERROR, NULL, 0,
+		    NULL, NULL, NULL, 0, 0,
+		    msg, extra);
+}
+static void
+xmlDebugErr3(xmlDebugCtxtPtr ctxt, int error, const char *msg, const char *extra)
+{
+    ctxt->errors++;
+    __xmlRaiseError(NULL, NULL, NULL,
+		    NULL, ctxt->node, XML_FROM_CHECK,
+		    error, XML_ERR_ERROR, NULL, 0,
+		    NULL, NULL, NULL, 0, 0,
+		    msg, extra);
+}
+
+/**
+ * xmlCtxtNsCheckScope:
+ * @ctxt: the debugging context
+ * @node: the node
+ * @ns: the namespace node
+ *
+ * Report if a given namespace is is not in scope.
+ */
+static void
+xmlCtxtNsCheckScope(xmlDebugCtxtPtr ctxt, xmlNodePtr node, xmlNsPtr ns)
+{
+    int ret;
+
+    ret = xmlNsCheckScope(node, ns);
+    if (ret == -2) {
+        if (ns->prefix == NULL)
+	    xmlDebugErr(ctxt, XML_CHECK_NS_SCOPE,
+			"Reference to default namespace not in scope\n");
+	else
+	    xmlDebugErr3(ctxt, XML_CHECK_NS_SCOPE,
+			 "Reference to namespace '%s' not in scope\n",
+			 (char *) ns->prefix);
+    }
+    if (ret == -3) {
+        if (ns->prefix == NULL)
+	    xmlDebugErr(ctxt, XML_CHECK_NS_ANCESTOR,
+			"Reference to default namespace not on ancestor\n");
+	else
+	    xmlDebugErr3(ctxt, XML_CHECK_NS_ANCESTOR,
+			 "Reference to namespace '%s' not on ancestor\n",
+			 (char *) ns->prefix);
+    }
+}
+
+/**
+ * xmlCtxtCheckString:
+ * @ctxt: the debug context
+ * @str: the string
+ *
+ * Do debugging on the string, currently it just checks the UTF-8 content
+ */
+static void
+xmlCtxtCheckString(xmlDebugCtxtPtr ctxt, const xmlChar * str)
+{
+    if (str == NULL) return;
+    if (ctxt->check) {
+        if (!xmlCheckUTF8(str)) {
+	    xmlDebugErr3(ctxt, XML_CHECK_NOT_UTF8,
+			 "String is not UTF-8 %s", (const char *) str);
+	}
+    }
+}
+
+/**
+ * xmlCtxtCheckName:
+ * @ctxt: the debug context
+ * @name: the name
+ *
+ * Do debugging on the name, for example the dictionnary status and
+ * conformance to the Name production.
+ */
+static void
+xmlCtxtCheckName(xmlDebugCtxtPtr ctxt, const xmlChar * name)
+{
+    if (ctxt->check) {
+	if (name == NULL) {
+	    xmlDebugErr(ctxt, XML_CHECK_NO_NAME, "Name is NULL");
+	    return;
+	}
+#if defined(LIBXML_TREE_ENABLED) || defined(LIBXML_SCHEMAS_ENABLED)
+        if (xmlValidateName(name, 0)) {
+	    xmlDebugErr3(ctxt, XML_CHECK_NOT_NCNAME,
+			 "Name is not an NCName '%s'", (const char *) name);
+	}
+#endif
+	if ((ctxt->dict != NULL) &&
+	    (!xmlDictOwns(ctxt->dict, name)) &&
+            ((ctxt->doc == NULL) ||
+             ((ctxt->doc->parseFlags & (XML_PARSE_SAX1 | XML_PARSE_NODICT)) == 0))) {
+	    xmlDebugErr3(ctxt, XML_CHECK_OUTSIDE_DICT,
+			 "Name is not from the document dictionnary '%s'",
+			 (const char *) name);
+	}
+    }
+}
+
+static void
+xmlCtxtGenericNodeCheck(xmlDebugCtxtPtr ctxt, xmlNodePtr node) {
+    xmlDocPtr doc;
+    xmlDictPtr dict;
+
+    doc = node->doc;
+
+    if (node->parent == NULL)
+        xmlDebugErr(ctxt, XML_CHECK_NO_PARENT,
+	            "Node has no parent\n");
+    if (node->doc == NULL) {
+        xmlDebugErr(ctxt, XML_CHECK_NO_DOC,
+	            "Node has no doc\n");
+        dict = NULL;
+    } else {
+	dict = doc->dict;
+	if ((dict == NULL) && (ctxt->nodict == 0)) {
+#if 0
+            /* desactivated right now as it raises too many errors */
+	    if (doc->type == XML_DOCUMENT_NODE)
+		xmlDebugErr(ctxt, XML_CHECK_NO_DICT,
+			    "Document has no dictionnary\n");
+#endif
+	    ctxt->nodict = 1;
+	}
+	if (ctxt->doc == NULL)
+	    ctxt->doc = doc;
+
+	if (ctxt->dict == NULL) {
+	    ctxt->dict = dict;
+	}
+    }
+    if ((node->parent != NULL) && (node->doc != node->parent->doc) &&
+        (!xmlStrEqual(node->name, BAD_CAST "pseudoroot")))
+        xmlDebugErr(ctxt, XML_CHECK_WRONG_DOC,
+	            "Node doc differs from parent's one\n");
+    if (node->prev == NULL) {
+        if (node->type == XML_ATTRIBUTE_NODE) {
+	    if ((node->parent != NULL) &&
+	        (node != (xmlNodePtr) node->parent->properties))
+		xmlDebugErr(ctxt, XML_CHECK_NO_PREV,
+                    "Attr has no prev and not first of attr list\n");
+
+        } else if ((node->parent != NULL) && (node->parent->children != node))
+	    xmlDebugErr(ctxt, XML_CHECK_NO_PREV,
+                    "Node has no prev and not first of parent list\n");
+    } else {
+        if (node->prev->next != node)
+	    xmlDebugErr(ctxt, XML_CHECK_WRONG_PREV,
+                        "Node prev->next : back link wrong\n");
+    }
+    if (node->next == NULL) {
+	if ((node->parent != NULL) && (node->type != XML_ATTRIBUTE_NODE) &&
+	    (node->parent->last != node) &&
+	    (node->parent->type == XML_ELEMENT_NODE))
+	    xmlDebugErr(ctxt, XML_CHECK_NO_NEXT,
+                    "Node has no next and not last of parent list\n");
+    } else {
+        if (node->next->prev != node)
+	    xmlDebugErr(ctxt, XML_CHECK_WRONG_NEXT,
+                    "Node next->prev : forward link wrong\n");
+        if (node->next->parent != node->parent)
+	    xmlDebugErr(ctxt, XML_CHECK_WRONG_PARENT,
+                    "Node next->prev : forward link wrong\n");
+    }
+    if (node->type == XML_ELEMENT_NODE) {
+        xmlNsPtr ns;
+
+	ns = node->nsDef;
+	while (ns != NULL) {
+	    xmlCtxtNsCheckScope(ctxt, node, ns);
+	    ns = ns->next;
+	}
+	if (node->ns != NULL)
+	    xmlCtxtNsCheckScope(ctxt, node, node->ns);
+    } else if (node->type == XML_ATTRIBUTE_NODE) {
+	if (node->ns != NULL)
+	    xmlCtxtNsCheckScope(ctxt, node, node->ns);
+    }
+
+    if ((node->type != XML_ELEMENT_NODE) &&
+	(node->type != XML_ATTRIBUTE_NODE) &&
+	(node->type != XML_ELEMENT_DECL) &&
+	(node->type != XML_ATTRIBUTE_DECL) &&
+	(node->type != XML_DTD_NODE) &&
+	(node->type != XML_HTML_DOCUMENT_NODE) &&
+	(node->type != XML_DOCUMENT_NODE)) {
+	if (node->content != NULL)
+	    xmlCtxtCheckString(ctxt, (const xmlChar *) node->content);
+    }
+    switch (node->type) {
+        case XML_ELEMENT_NODE:
+        case XML_ATTRIBUTE_NODE:
+	    xmlCtxtCheckName(ctxt, node->name);
+	    break;
+        case XML_TEXT_NODE:
+	    if ((node->name == xmlStringText) ||
+	        (node->name == xmlStringTextNoenc))
+		break;
+	    /* some case of entity substitution can lead to this */
+	    if ((ctxt->dict != NULL) &&
+	        (node->name == xmlDictLookup(ctxt->dict, BAD_CAST "nbktext",
+		                             7)))
+		break;
+
+	    xmlDebugErr3(ctxt, XML_CHECK_WRONG_NAME,
+			 "Text node has wrong name '%s'",
+			 (const char *) node->name);
+	    break;
+        case XML_COMMENT_NODE:
+	    if (node->name == xmlStringComment)
+		break;
+	    xmlDebugErr3(ctxt, XML_CHECK_WRONG_NAME,
+			 "Comment node has wrong name '%s'",
+			 (const char *) node->name);
+	    break;
+        case XML_PI_NODE:
+	    xmlCtxtCheckName(ctxt, node->name);
+	    break;
+        case XML_CDATA_SECTION_NODE:
+	    if (node->name == NULL)
+		break;
+	    xmlDebugErr3(ctxt, XML_CHECK_NAME_NOT_NULL,
+			 "CData section has non NULL name '%s'",
+			 (const char *) node->name);
+	    break;
+        case XML_ENTITY_REF_NODE:
+        case XML_ENTITY_NODE:
+        case XML_DOCUMENT_TYPE_NODE:
+        case XML_DOCUMENT_FRAG_NODE:
+        case XML_NOTATION_NODE:
+        case XML_DTD_NODE:
+        case XML_ELEMENT_DECL:
+        case XML_ATTRIBUTE_DECL:
+        case XML_ENTITY_DECL:
+        case XML_NAMESPACE_DECL:
+        case XML_XINCLUDE_START:
+        case XML_XINCLUDE_END:
+#ifdef LIBXML_DOCB_ENABLED
+        case XML_DOCB_DOCUMENT_NODE:
+#endif
+        case XML_DOCUMENT_NODE:
+        case XML_HTML_DOCUMENT_NODE:
+	    break;
+    }
+}
+
+static void
+xmlCtxtDumpString(xmlDebugCtxtPtr ctxt, const xmlChar * str)
+{
+    int i;
+
+    if (ctxt->check) {
+        return;
+    }
+    /* TODO: check UTF8 content of the string */
+    if (str == NULL) {
+        fprintf(ctxt->output, "(NULL)");
+        return;
+    }
+    for (i = 0; i < 40; i++)
+        if (str[i] == 0)
+            return;
+        else if (IS_BLANK_CH(str[i]))
+            fputc(' ', ctxt->output);
+        else if (str[i] >= 0x80)
+            fprintf(ctxt->output, "#%X", str[i]);
+        else
+            fputc(str[i], ctxt->output);
+    fprintf(ctxt->output, "...");
+}
+
+static void
+xmlCtxtDumpDtdNode(xmlDebugCtxtPtr ctxt, xmlDtdPtr dtd)
+{
+    xmlCtxtDumpSpaces(ctxt);
+
+    if (dtd == NULL) {
+        if (!ctxt->check)
+            fprintf(ctxt->output, "DTD node is NULL\n");
+        return;
+    }
+
+    if (dtd->type != XML_DTD_NODE) {
+	xmlDebugErr(ctxt, XML_CHECK_NOT_DTD,
+	            "Node is not a DTD");
+        return;
+    }
+    if (!ctxt->check) {
+        if (dtd->name != NULL)
+            fprintf(ctxt->output, "DTD(%s)", (char *) dtd->name);
+        else
+            fprintf(ctxt->output, "DTD");
+        if (dtd->ExternalID != NULL)
+            fprintf(ctxt->output, ", PUBLIC %s", (char *) dtd->ExternalID);
+        if (dtd->SystemID != NULL)
+            fprintf(ctxt->output, ", SYSTEM %s", (char *) dtd->SystemID);
+        fprintf(ctxt->output, "\n");
+    }
+    /*
+     * Do a bit of checking
+     */
+    xmlCtxtGenericNodeCheck(ctxt, (xmlNodePtr) dtd);
+}
+
+static void
+xmlCtxtDumpAttrDecl(xmlDebugCtxtPtr ctxt, xmlAttributePtr attr)
+{
+    xmlCtxtDumpSpaces(ctxt);
+
+    if (attr == NULL) {
+        if (!ctxt->check)
+            fprintf(ctxt->output, "Attribute declaration is NULL\n");
+        return;
+    }
+    if (attr->type != XML_ATTRIBUTE_DECL) {
+	xmlDebugErr(ctxt, XML_CHECK_NOT_ATTR_DECL,
+	            "Node is not an attribute declaration");
+        return;
+    }
+    if (attr->name != NULL) {
+        if (!ctxt->check)
+            fprintf(ctxt->output, "ATTRDECL(%s)", (char *) attr->name);
+    } else
+	xmlDebugErr(ctxt, XML_CHECK_NO_NAME,
+	            "Node attribute declaration has no name");
+    if (attr->elem != NULL) {
+        if (!ctxt->check)
+            fprintf(ctxt->output, " for %s", (char *) attr->elem);
+    } else
+	xmlDebugErr(ctxt, XML_CHECK_NO_ELEM,
+	            "Node attribute declaration has no element name");
+    if (!ctxt->check) {
+        switch (attr->atype) {
+            case XML_ATTRIBUTE_CDATA:
+                fprintf(ctxt->output, " CDATA");
+                break;
+            case XML_ATTRIBUTE_ID:
+                fprintf(ctxt->output, " ID");
+                break;
+            case XML_ATTRIBUTE_IDREF:
+                fprintf(ctxt->output, " IDREF");
+                break;
+            case XML_ATTRIBUTE_IDREFS:
+                fprintf(ctxt->output, " IDREFS");
+                break;
+            case XML_ATTRIBUTE_ENTITY:
+                fprintf(ctxt->output, " ENTITY");
+                break;
+            case XML_ATTRIBUTE_ENTITIES:
+                fprintf(ctxt->output, " ENTITIES");
+                break;
+            case XML_ATTRIBUTE_NMTOKEN:
+                fprintf(ctxt->output, " NMTOKEN");
+                break;
+            case XML_ATTRIBUTE_NMTOKENS:
+                fprintf(ctxt->output, " NMTOKENS");
+                break;
+            case XML_ATTRIBUTE_ENUMERATION:
+                fprintf(ctxt->output, " ENUMERATION");
+                break;
+            case XML_ATTRIBUTE_NOTATION:
+                fprintf(ctxt->output, " NOTATION ");
+                break;
+        }
+        if (attr->tree != NULL) {
+            int indx;
+            xmlEnumerationPtr cur = attr->tree;
+
+            for (indx = 0; indx < 5; indx++) {
+                if (indx != 0)
+                    fprintf(ctxt->output, "|%s", (char *) cur->name);
+                else
+                    fprintf(ctxt->output, " (%s", (char *) cur->name);
+                cur = cur->next;
+                if (cur == NULL)
+                    break;
+            }
+            if (cur == NULL)
+                fprintf(ctxt->output, ")");
+            else
+                fprintf(ctxt->output, "...)");
+        }
+        switch (attr->def) {
+            case XML_ATTRIBUTE_NONE:
+                break;
+            case XML_ATTRIBUTE_REQUIRED:
+                fprintf(ctxt->output, " REQUIRED");
+                break;
+            case XML_ATTRIBUTE_IMPLIED:
+                fprintf(ctxt->output, " IMPLIED");
+                break;
+            case XML_ATTRIBUTE_FIXED:
+                fprintf(ctxt->output, " FIXED");
+                break;
+        }
+        if (attr->defaultValue != NULL) {
+            fprintf(ctxt->output, "\"");
+            xmlCtxtDumpString(ctxt, attr->defaultValue);
+            fprintf(ctxt->output, "\"");
+        }
+        fprintf(ctxt->output, "\n");
+    }
+
+    /*
+     * Do a bit of checking
+     */
+    xmlCtxtGenericNodeCheck(ctxt, (xmlNodePtr) attr);
+}
+
+static void
+xmlCtxtDumpElemDecl(xmlDebugCtxtPtr ctxt, xmlElementPtr elem)
+{
+    xmlCtxtDumpSpaces(ctxt);
+
+    if (elem == NULL) {
+        if (!ctxt->check)
+            fprintf(ctxt->output, "Element declaration is NULL\n");
+        return;
+    }
+    if (elem->type != XML_ELEMENT_DECL) {
+	xmlDebugErr(ctxt, XML_CHECK_NOT_ELEM_DECL,
+	            "Node is not an element declaration");
+        return;
+    }
+    if (elem->name != NULL) {
+        if (!ctxt->check) {
+            fprintf(ctxt->output, "ELEMDECL(");
+            xmlCtxtDumpString(ctxt, elem->name);
+            fprintf(ctxt->output, ")");
+        }
+    } else
+	xmlDebugErr(ctxt, XML_CHECK_NO_NAME,
+	            "Element declaration has no name");
+    if (!ctxt->check) {
+        switch (elem->etype) {
+            case XML_ELEMENT_TYPE_UNDEFINED:
+                fprintf(ctxt->output, ", UNDEFINED");
+                break;
+            case XML_ELEMENT_TYPE_EMPTY:
+                fprintf(ctxt->output, ", EMPTY");
+                break;
+            case XML_ELEMENT_TYPE_ANY:
+                fprintf(ctxt->output, ", ANY");
+                break;
+            case XML_ELEMENT_TYPE_MIXED:
+                fprintf(ctxt->output, ", MIXED ");
+                break;
+            case XML_ELEMENT_TYPE_ELEMENT:
+                fprintf(ctxt->output, ", MIXED ");
+                break;
+        }
+        if ((elem->type != XML_ELEMENT_NODE) && (elem->content != NULL)) {
+            char buf[5001];
+
+            buf[0] = 0;
+            xmlSnprintfElementContent(buf, 5000, elem->content, 1);
+            buf[5000] = 0;
+            fprintf(ctxt->output, "%s", buf);
+        }
+        fprintf(ctxt->output, "\n");
+    }
+
+    /*
+     * Do a bit of checking
+     */
+    xmlCtxtGenericNodeCheck(ctxt, (xmlNodePtr) elem);
+}
+
+static void
+xmlCtxtDumpEntityDecl(xmlDebugCtxtPtr ctxt, xmlEntityPtr ent)
+{
+    xmlCtxtDumpSpaces(ctxt);
+
+    if (ent == NULL) {
+        if (!ctxt->check)
+            fprintf(ctxt->output, "Entity declaration is NULL\n");
+        return;
+    }
+    if (ent->type != XML_ENTITY_DECL) {
+	xmlDebugErr(ctxt, XML_CHECK_NOT_ENTITY_DECL,
+	            "Node is not an entity declaration");
+        return;
+    }
+    if (ent->name != NULL) {
+        if (!ctxt->check) {
+            fprintf(ctxt->output, "ENTITYDECL(");
+            xmlCtxtDumpString(ctxt, ent->name);
+            fprintf(ctxt->output, ")");
+        }
+    } else
+	xmlDebugErr(ctxt, XML_CHECK_NO_NAME,
+	            "Entity declaration has no name");
+    if (!ctxt->check) {
+        switch (ent->etype) {
+            case XML_INTERNAL_GENERAL_ENTITY:
+                fprintf(ctxt->output, ", internal\n");
+                break;
+            case XML_EXTERNAL_GENERAL_PARSED_ENTITY:
+                fprintf(ctxt->output, ", external parsed\n");
+                break;
+            case XML_EXTERNAL_GENERAL_UNPARSED_ENTITY:
+                fprintf(ctxt->output, ", unparsed\n");
+                break;
+            case XML_INTERNAL_PARAMETER_ENTITY:
+                fprintf(ctxt->output, ", parameter\n");
+                break;
+            case XML_EXTERNAL_PARAMETER_ENTITY:
+                fprintf(ctxt->output, ", external parameter\n");
+                break;
+            case XML_INTERNAL_PREDEFINED_ENTITY:
+                fprintf(ctxt->output, ", predefined\n");
+                break;
+        }
+        if (ent->ExternalID) {
+            xmlCtxtDumpSpaces(ctxt);
+            fprintf(ctxt->output, " ExternalID=%s\n",
+                    (char *) ent->ExternalID);
+        }
+        if (ent->SystemID) {
+            xmlCtxtDumpSpaces(ctxt);
+            fprintf(ctxt->output, " SystemID=%s\n",
+                    (char *) ent->SystemID);
+        }
+        if (ent->URI != NULL) {
+            xmlCtxtDumpSpaces(ctxt);
+            fprintf(ctxt->output, " URI=%s\n", (char *) ent->URI);
+        }
+        if (ent->content) {
+            xmlCtxtDumpSpaces(ctxt);
+            fprintf(ctxt->output, " content=");
+            xmlCtxtDumpString(ctxt, ent->content);
+            fprintf(ctxt->output, "\n");
+        }
+    }
+
+    /*
+     * Do a bit of checking
+     */
+    xmlCtxtGenericNodeCheck(ctxt, (xmlNodePtr) ent);
+}
+
+static void
+xmlCtxtDumpNamespace(xmlDebugCtxtPtr ctxt, xmlNsPtr ns)
+{
+    xmlCtxtDumpSpaces(ctxt);
+
+    if (ns == NULL) {
+        if (!ctxt->check)
+            fprintf(ctxt->output, "namespace node is NULL\n");
+        return;
+    }
+    if (ns->type != XML_NAMESPACE_DECL) {
+	xmlDebugErr(ctxt, XML_CHECK_NOT_NS_DECL,
+	            "Node is not a namespace declaration");
+        return;
+    }
+    if (ns->href == NULL) {
+        if (ns->prefix != NULL)
+	    xmlDebugErr3(ctxt, XML_CHECK_NO_HREF,
+                    "Incomplete namespace %s href=NULL\n",
+                    (char *) ns->prefix);
+        else
+	    xmlDebugErr(ctxt, XML_CHECK_NO_HREF,
+                    "Incomplete default namespace href=NULL\n");
+    } else {
+        if (!ctxt->check) {
+            if (ns->prefix != NULL)
+                fprintf(ctxt->output, "namespace %s href=",
+                        (char *) ns->prefix);
+            else
+                fprintf(ctxt->output, "default namespace href=");
+
+            xmlCtxtDumpString(ctxt, ns->href);
+            fprintf(ctxt->output, "\n");
+        }
+    }
+}
+
+static void
+xmlCtxtDumpNamespaceList(xmlDebugCtxtPtr ctxt, xmlNsPtr ns)
+{
+    while (ns != NULL) {
+        xmlCtxtDumpNamespace(ctxt, ns);
+        ns = ns->next;
+    }
+}
+
+static void
+xmlCtxtDumpEntity(xmlDebugCtxtPtr ctxt, xmlEntityPtr ent)
+{
+    xmlCtxtDumpSpaces(ctxt);
+
+    if (ent == NULL) {
+        if (!ctxt->check)
+            fprintf(ctxt->output, "Entity is NULL\n");
+        return;
+    }
+    if (!ctxt->check) {
+        switch (ent->etype) {
+            case XML_INTERNAL_GENERAL_ENTITY:
+                fprintf(ctxt->output, "INTERNAL_GENERAL_ENTITY ");
+                break;
+            case XML_EXTERNAL_GENERAL_PARSED_ENTITY:
+                fprintf(ctxt->output, "EXTERNAL_GENERAL_PARSED_ENTITY ");
+                break;
+            case XML_EXTERNAL_GENERAL_UNPARSED_ENTITY:
+                fprintf(ctxt->output, "EXTERNAL_GENERAL_UNPARSED_ENTITY ");
+                break;
+            case XML_INTERNAL_PARAMETER_ENTITY:
+                fprintf(ctxt->output, "INTERNAL_PARAMETER_ENTITY ");
+                break;
+            case XML_EXTERNAL_PARAMETER_ENTITY:
+                fprintf(ctxt->output, "EXTERNAL_PARAMETER_ENTITY ");
+                break;
+            default:
+                fprintf(ctxt->output, "ENTITY_%d ! ", (int) ent->etype);
+        }
+        fprintf(ctxt->output, "%s\n", ent->name);
+        if (ent->ExternalID) {
+            xmlCtxtDumpSpaces(ctxt);
+            fprintf(ctxt->output, "ExternalID=%s\n",
+                    (char *) ent->ExternalID);
+        }
+        if (ent->SystemID) {
+            xmlCtxtDumpSpaces(ctxt);
+            fprintf(ctxt->output, "SystemID=%s\n", (char *) ent->SystemID);
+        }
+        if (ent->URI) {
+            xmlCtxtDumpSpaces(ctxt);
+            fprintf(ctxt->output, "URI=%s\n", (char *) ent->URI);
+        }
+        if (ent->content) {
+            xmlCtxtDumpSpaces(ctxt);
+            fprintf(ctxt->output, "content=");
+            xmlCtxtDumpString(ctxt, ent->content);
+            fprintf(ctxt->output, "\n");
+        }
+    }
+}
+
+/**
+ * xmlCtxtDumpAttr:
+ * @output:  the FILE * for the output
+ * @attr:  the attribute
+ * @depth:  the indentation level.
+ *
+ * Dumps debug information for the attribute
+ */
+static void
+xmlCtxtDumpAttr(xmlDebugCtxtPtr ctxt, xmlAttrPtr attr)
+{
+    xmlCtxtDumpSpaces(ctxt);
+
+    if (attr == NULL) {
+        if (!ctxt->check)
+            fprintf(ctxt->output, "Attr is NULL");
+        return;
+    }
+    if (!ctxt->check) {
+        fprintf(ctxt->output, "ATTRIBUTE ");
+	xmlCtxtDumpString(ctxt, attr->name);
+        fprintf(ctxt->output, "\n");
+        if (attr->children != NULL) {
+            ctxt->depth++;
+            xmlCtxtDumpNodeList(ctxt, attr->children);
+            ctxt->depth--;
+        }
+    }
+    if (attr->name == NULL)
+	xmlDebugErr(ctxt, XML_CHECK_NO_NAME,
+	            "Attribute has no name");
+
+    /*
+     * Do a bit of checking
+     */
+    xmlCtxtGenericNodeCheck(ctxt, (xmlNodePtr) attr);
+}
+
+/**
+ * xmlCtxtDumpAttrList:
+ * @output:  the FILE * for the output
+ * @attr:  the attribute list
+ * @depth:  the indentation level.
+ *
+ * Dumps debug information for the attribute list
+ */
+static void
+xmlCtxtDumpAttrList(xmlDebugCtxtPtr ctxt, xmlAttrPtr attr)
+{
+    while (attr != NULL) {
+        xmlCtxtDumpAttr(ctxt, attr);
+        attr = attr->next;
+    }
+}
+
+/**
+ * xmlCtxtDumpOneNode:
+ * @output:  the FILE * for the output
+ * @node:  the node
+ * @depth:  the indentation level.
+ *
+ * Dumps debug information for the element node, it is not recursive
+ */
+static void
+xmlCtxtDumpOneNode(xmlDebugCtxtPtr ctxt, xmlNodePtr node)
+{
+    if (node == NULL) {
+        if (!ctxt->check) {
+            xmlCtxtDumpSpaces(ctxt);
+            fprintf(ctxt->output, "node is NULL\n");
+        }
+        return;
+    }
+    ctxt->node = node;
+
+    switch (node->type) {
+        case XML_ELEMENT_NODE:
+            if (!ctxt->check) {
+                xmlCtxtDumpSpaces(ctxt);
+                fprintf(ctxt->output, "ELEMENT ");
+                if ((node->ns != NULL) && (node->ns->prefix != NULL)) {
+                    xmlCtxtDumpString(ctxt, node->ns->prefix);
+                    fprintf(ctxt->output, ":");
+                }
+                xmlCtxtDumpString(ctxt, node->name);
+                fprintf(ctxt->output, "\n");
+            }
+            break;
+        case XML_ATTRIBUTE_NODE:
+            if (!ctxt->check)
+                xmlCtxtDumpSpaces(ctxt);
+            fprintf(ctxt->output, "Error, ATTRIBUTE found here\n");
+            xmlCtxtGenericNodeCheck(ctxt, node);
+            return;
+        case XML_TEXT_NODE:
+            if (!ctxt->check) {
+                xmlCtxtDumpSpaces(ctxt);
+                if (node->name == (const xmlChar *) xmlStringTextNoenc)
+                    fprintf(ctxt->output, "TEXT no enc");
+                else
+                    fprintf(ctxt->output, "TEXT");
+		if (ctxt->options & DUMP_TEXT_TYPE) {
+		    if (node->content == (xmlChar *) &(node->properties))
+			fprintf(ctxt->output, " compact\n");
+		    else if (xmlDictOwns(ctxt->dict, node->content) == 1)
+			fprintf(ctxt->output, " interned\n");
+		    else
+			fprintf(ctxt->output, "\n");
+		} else
+		    fprintf(ctxt->output, "\n");
+            }
+            break;
+        case XML_CDATA_SECTION_NODE:
+            if (!ctxt->check) {
+                xmlCtxtDumpSpaces(ctxt);
+                fprintf(ctxt->output, "CDATA_SECTION\n");
+            }
+            break;
+        case XML_ENTITY_REF_NODE:
+            if (!ctxt->check) {
+                xmlCtxtDumpSpaces(ctxt);
+                fprintf(ctxt->output, "ENTITY_REF(%s)\n",
+                        (char *) node->name);
+            }
+            break;
+        case XML_ENTITY_NODE:
+            if (!ctxt->check) {
+                xmlCtxtDumpSpaces(ctxt);
+                fprintf(ctxt->output, "ENTITY\n");
+            }
+            break;
+        case XML_PI_NODE:
+            if (!ctxt->check) {
+                xmlCtxtDumpSpaces(ctxt);
+                fprintf(ctxt->output, "PI %s\n", (char *) node->name);
+            }
+            break;
+        case XML_COMMENT_NODE:
+            if (!ctxt->check) {
+                xmlCtxtDumpSpaces(ctxt);
+                fprintf(ctxt->output, "COMMENT\n");
+            }
+            break;
+        case XML_DOCUMENT_NODE:
+        case XML_HTML_DOCUMENT_NODE:
+            if (!ctxt->check) {
+                xmlCtxtDumpSpaces(ctxt);
+            }
+            fprintf(ctxt->output, "Error, DOCUMENT found here\n");
+            xmlCtxtGenericNodeCheck(ctxt, node);
+            return;
+        case XML_DOCUMENT_TYPE_NODE:
+            if (!ctxt->check) {
+                xmlCtxtDumpSpaces(ctxt);
+                fprintf(ctxt->output, "DOCUMENT_TYPE\n");
+            }
+            break;
+        case XML_DOCUMENT_FRAG_NODE:
+            if (!ctxt->check) {
+                xmlCtxtDumpSpaces(ctxt);
+                fprintf(ctxt->output, "DOCUMENT_FRAG\n");
+            }
+            break;
+        case XML_NOTATION_NODE:
+            if (!ctxt->check) {
+                xmlCtxtDumpSpaces(ctxt);
+                fprintf(ctxt->output, "NOTATION\n");
+            }
+            break;
+        case XML_DTD_NODE:
+            xmlCtxtDumpDtdNode(ctxt, (xmlDtdPtr) node);
+            return;
+        case XML_ELEMENT_DECL:
+            xmlCtxtDumpElemDecl(ctxt, (xmlElementPtr) node);
+            return;
+        case XML_ATTRIBUTE_DECL:
+            xmlCtxtDumpAttrDecl(ctxt, (xmlAttributePtr) node);
+            return;
+        case XML_ENTITY_DECL:
+            xmlCtxtDumpEntityDecl(ctxt, (xmlEntityPtr) node);
+            return;
+        case XML_NAMESPACE_DECL:
+            xmlCtxtDumpNamespace(ctxt, (xmlNsPtr) node);
+            return;
+        case XML_XINCLUDE_START:
+            if (!ctxt->check) {
+                xmlCtxtDumpSpaces(ctxt);
+                fprintf(ctxt->output, "INCLUDE START\n");
+            }
+            return;
+        case XML_XINCLUDE_END:
+            if (!ctxt->check) {
+                xmlCtxtDumpSpaces(ctxt);
+                fprintf(ctxt->output, "INCLUDE END\n");
+            }
+            return;
+        default:
+            if (!ctxt->check)
+                xmlCtxtDumpSpaces(ctxt);
+	    xmlDebugErr2(ctxt, XML_CHECK_UNKNOWN_NODE,
+	                "Unknown node type %d\n", node->type);
+            return;
+    }
+    if (node->doc == NULL) {
+        if (!ctxt->check) {
+            xmlCtxtDumpSpaces(ctxt);
+        }
+        fprintf(ctxt->output, "PBM: doc == NULL !!!\n");
+    }
+    ctxt->depth++;
+    if ((node->type == XML_ELEMENT_NODE) && (node->nsDef != NULL))
+        xmlCtxtDumpNamespaceList(ctxt, node->nsDef);
+    if ((node->type == XML_ELEMENT_NODE) && (node->properties != NULL))
+        xmlCtxtDumpAttrList(ctxt, node->properties);
+    if (node->type != XML_ENTITY_REF_NODE) {
+        if ((node->type != XML_ELEMENT_NODE) && (node->content != NULL)) {
+            if (!ctxt->check) {
+                xmlCtxtDumpSpaces(ctxt);
+                fprintf(ctxt->output, "content=");
+                xmlCtxtDumpString(ctxt, node->content);
+                fprintf(ctxt->output, "\n");
+            }
+        }
+    } else {
+        xmlEntityPtr ent;
+
+        ent = xmlGetDocEntity(node->doc, node->name);
+        if (ent != NULL)
+            xmlCtxtDumpEntity(ctxt, ent);
+    }
+    ctxt->depth--;
+
+    /*
+     * Do a bit of checking
+     */
+    xmlCtxtGenericNodeCheck(ctxt, node);
+}
+
+/**
+ * xmlCtxtDumpNode:
+ * @output:  the FILE * for the output
+ * @node:  the node
+ * @depth:  the indentation level.
+ *
+ * Dumps debug information for the element node, it is recursive
+ */
+static void
+xmlCtxtDumpNode(xmlDebugCtxtPtr ctxt, xmlNodePtr node)
+{
+    if (node == NULL) {
+        if (!ctxt->check) {
+            xmlCtxtDumpSpaces(ctxt);
+            fprintf(ctxt->output, "node is NULL\n");
+        }
+        return;
+    }
+    xmlCtxtDumpOneNode(ctxt, node);
+    if ((node->type != XML_NAMESPACE_DECL) &&
+        (node->children != NULL) && (node->type != XML_ENTITY_REF_NODE)) {
+        ctxt->depth++;
+        xmlCtxtDumpNodeList(ctxt, node->children);
+        ctxt->depth--;
+    }
+}
+
+/**
+ * xmlCtxtDumpNodeList:
+ * @output:  the FILE * for the output
+ * @node:  the node list
+ * @depth:  the indentation level.
+ *
+ * Dumps debug information for the list of element node, it is recursive
+ */
+static void
+xmlCtxtDumpNodeList(xmlDebugCtxtPtr ctxt, xmlNodePtr node)
+{
+    while (node != NULL) {
+        xmlCtxtDumpNode(ctxt, node);
+        node = node->next;
+    }
+}
+
+static void
+xmlCtxtDumpDocHead(xmlDebugCtxtPtr ctxt, xmlDocPtr doc)
+{
+    if (doc == NULL) {
+        if (!ctxt->check)
+            fprintf(ctxt->output, "DOCUMENT == NULL !\n");
+        return;
+    }
+    ctxt->node = (xmlNodePtr) doc;
+
+    switch (doc->type) {
+        case XML_ELEMENT_NODE:
+	    xmlDebugErr(ctxt, XML_CHECK_FOUND_ELEMENT,
+	                "Misplaced ELEMENT node\n");
+            break;
+        case XML_ATTRIBUTE_NODE:
+	    xmlDebugErr(ctxt, XML_CHECK_FOUND_ATTRIBUTE,
+	                "Misplaced ATTRIBUTE node\n");
+            break;
+        case XML_TEXT_NODE:
+	    xmlDebugErr(ctxt, XML_CHECK_FOUND_TEXT,
+	                "Misplaced TEXT node\n");
+            break;
+        case XML_CDATA_SECTION_NODE:
+	    xmlDebugErr(ctxt, XML_CHECK_FOUND_CDATA,
+	                "Misplaced CDATA node\n");
+            break;
+        case XML_ENTITY_REF_NODE:
+	    xmlDebugErr(ctxt, XML_CHECK_FOUND_ENTITYREF,
+	                "Misplaced ENTITYREF node\n");
+            break;
+        case XML_ENTITY_NODE:
+	    xmlDebugErr(ctxt, XML_CHECK_FOUND_ENTITY,
+	                "Misplaced ENTITY node\n");
+            break;
+        case XML_PI_NODE:
+	    xmlDebugErr(ctxt, XML_CHECK_FOUND_PI,
+	                "Misplaced PI node\n");
+            break;
+        case XML_COMMENT_NODE:
+	    xmlDebugErr(ctxt, XML_CHECK_FOUND_COMMENT,
+	                "Misplaced COMMENT node\n");
+            break;
+        case XML_DOCUMENT_NODE:
+	    if (!ctxt->check)
+		fprintf(ctxt->output, "DOCUMENT\n");
+            break;
+        case XML_HTML_DOCUMENT_NODE:
+	    if (!ctxt->check)
+		fprintf(ctxt->output, "HTML DOCUMENT\n");
+            break;
+        case XML_DOCUMENT_TYPE_NODE:
+	    xmlDebugErr(ctxt, XML_CHECK_FOUND_DOCTYPE,
+	                "Misplaced DOCTYPE node\n");
+            break;
+        case XML_DOCUMENT_FRAG_NODE:
+	    xmlDebugErr(ctxt, XML_CHECK_FOUND_FRAGMENT,
+	                "Misplaced FRAGMENT node\n");
+            break;
+        case XML_NOTATION_NODE:
+	    xmlDebugErr(ctxt, XML_CHECK_FOUND_NOTATION,
+	                "Misplaced NOTATION node\n");
+            break;
+        default:
+	    xmlDebugErr2(ctxt, XML_CHECK_UNKNOWN_NODE,
+	                "Unknown node type %d\n", doc->type);
+    }
+}
+
+/**
+ * xmlCtxtDumpDocumentHead:
+ * @output:  the FILE * for the output
+ * @doc:  the document
+ *
+ * Dumps debug information cncerning the document, not recursive
+ */
+static void
+xmlCtxtDumpDocumentHead(xmlDebugCtxtPtr ctxt, xmlDocPtr doc)
+{
+    if (doc == NULL) return;
+    xmlCtxtDumpDocHead(ctxt, doc);
+    if (!ctxt->check) {
+        if (doc->name != NULL) {
+            fprintf(ctxt->output, "name=");
+            xmlCtxtDumpString(ctxt, BAD_CAST doc->name);
+            fprintf(ctxt->output, "\n");
+        }
+        if (doc->version != NULL) {
+            fprintf(ctxt->output, "version=");
+            xmlCtxtDumpString(ctxt, doc->version);
+            fprintf(ctxt->output, "\n");
+        }
+        if (doc->encoding != NULL) {
+            fprintf(ctxt->output, "encoding=");
+            xmlCtxtDumpString(ctxt, doc->encoding);
+            fprintf(ctxt->output, "\n");
+        }
+        if (doc->URL != NULL) {
+            fprintf(ctxt->output, "URL=");
+            xmlCtxtDumpString(ctxt, doc->URL);
+            fprintf(ctxt->output, "\n");
+        }
+        if (doc->standalone)
+            fprintf(ctxt->output, "standalone=true\n");
+    }
+    if (doc->oldNs != NULL)
+        xmlCtxtDumpNamespaceList(ctxt, doc->oldNs);
+}
+
+/**
+ * xmlCtxtDumpDocument:
+ * @output:  the FILE * for the output
+ * @doc:  the document
+ *
+ * Dumps debug information for the document, it's recursive
+ */
+static void
+xmlCtxtDumpDocument(xmlDebugCtxtPtr ctxt, xmlDocPtr doc)
+{
+    if (doc == NULL) {
+        if (!ctxt->check)
+            fprintf(ctxt->output, "DOCUMENT == NULL !\n");
+        return;
+    }
+    xmlCtxtDumpDocumentHead(ctxt, doc);
+    if (((doc->type == XML_DOCUMENT_NODE) ||
+         (doc->type == XML_HTML_DOCUMENT_NODE))
+        && (doc->children != NULL)) {
+        ctxt->depth++;
+        xmlCtxtDumpNodeList(ctxt, doc->children);
+        ctxt->depth--;
+    }
+}
+
+static void
+xmlCtxtDumpEntityCallback(xmlEntityPtr cur, xmlDebugCtxtPtr ctxt)
+{
+    if (cur == NULL) {
+        if (!ctxt->check)
+            fprintf(ctxt->output, "Entity is NULL");
+        return;
+    }
+    if (!ctxt->check) {
+        fprintf(ctxt->output, "%s : ", (char *) cur->name);
+        switch (cur->etype) {
+            case XML_INTERNAL_GENERAL_ENTITY:
+                fprintf(ctxt->output, "INTERNAL GENERAL, ");
+                break;
+            case XML_EXTERNAL_GENERAL_PARSED_ENTITY:
+                fprintf(ctxt->output, "EXTERNAL PARSED, ");
+                break;
+            case XML_EXTERNAL_GENERAL_UNPARSED_ENTITY:
+                fprintf(ctxt->output, "EXTERNAL UNPARSED, ");
+                break;
+            case XML_INTERNAL_PARAMETER_ENTITY:
+                fprintf(ctxt->output, "INTERNAL PARAMETER, ");
+                break;
+            case XML_EXTERNAL_PARAMETER_ENTITY:
+                fprintf(ctxt->output, "EXTERNAL PARAMETER, ");
+                break;
+            default:
+		xmlDebugErr2(ctxt, XML_CHECK_ENTITY_TYPE,
+			     "Unknown entity type %d\n", cur->etype);
+        }
+        if (cur->ExternalID != NULL)
+            fprintf(ctxt->output, "ID \"%s\"", (char *) cur->ExternalID);
+        if (cur->SystemID != NULL)
+            fprintf(ctxt->output, "SYSTEM \"%s\"", (char *) cur->SystemID);
+        if (cur->orig != NULL)
+            fprintf(ctxt->output, "\n orig \"%s\"", (char *) cur->orig);
+        if ((cur->type != XML_ELEMENT_NODE) && (cur->content != NULL))
+            fprintf(ctxt->output, "\n content \"%s\"",
+                    (char *) cur->content);
+        fprintf(ctxt->output, "\n");
+    }
+}
+
+/**
+ * xmlCtxtDumpEntities:
+ * @output:  the FILE * for the output
+ * @doc:  the document
+ *
+ * Dumps debug information for all the entities in use by the document
+ */
+static void
+xmlCtxtDumpEntities(xmlDebugCtxtPtr ctxt, xmlDocPtr doc)
+{
+    if (doc == NULL) return;
+    xmlCtxtDumpDocHead(ctxt, doc);
+    if ((doc->intSubset != NULL) && (doc->intSubset->entities != NULL)) {
+        xmlEntitiesTablePtr table = (xmlEntitiesTablePtr)
+            doc->intSubset->entities;
+
+        if (!ctxt->check)
+            fprintf(ctxt->output, "Entities in internal subset\n");
+        xmlHashScan(table, (xmlHashScanner) xmlCtxtDumpEntityCallback,
+                    ctxt);
+    } else
+        fprintf(ctxt->output, "No entities in internal subset\n");
+    if ((doc->extSubset != NULL) && (doc->extSubset->entities != NULL)) {
+        xmlEntitiesTablePtr table = (xmlEntitiesTablePtr)
+            doc->extSubset->entities;
+
+        if (!ctxt->check)
+            fprintf(ctxt->output, "Entities in external subset\n");
+        xmlHashScan(table, (xmlHashScanner) xmlCtxtDumpEntityCallback,
+                    ctxt);
+    } else if (!ctxt->check)
+        fprintf(ctxt->output, "No entities in external subset\n");
+}
+
+/**
+ * xmlCtxtDumpDTD:
+ * @output:  the FILE * for the output
+ * @dtd:  the DTD
+ *
+ * Dumps debug information for the DTD
+ */
+static void
+xmlCtxtDumpDTD(xmlDebugCtxtPtr ctxt, xmlDtdPtr dtd)
+{
+    if (dtd == NULL) {
+        if (!ctxt->check)
+            fprintf(ctxt->output, "DTD is NULL\n");
+        return;
+    }
+    xmlCtxtDumpDtdNode(ctxt, dtd);
+    if (dtd->children == NULL)
+        fprintf(ctxt->output, "    DTD is empty\n");
+    else {
+        ctxt->depth++;
+        xmlCtxtDumpNodeList(ctxt, dtd->children);
+        ctxt->depth--;
+    }
+}
+
+/************************************************************************
+ *									*
+ *			Public entry points for dump			*
+ *									*
+ ************************************************************************/
+
+/**
+ * xmlDebugDumpString:
+ * @output:  the FILE * for the output
+ * @str:  the string
+ *
+ * Dumps informations about the string, shorten it if necessary
+ */
+void
+xmlDebugDumpString(FILE * output, const xmlChar * str)
+{
+    int i;
+
+    if (output == NULL)
+	output = stdout;
+    if (str == NULL) {
+        fprintf(output, "(NULL)");
+        return;
+    }
+    for (i = 0; i < 40; i++)
+        if (str[i] == 0)
+            return;
+        else if (IS_BLANK_CH(str[i]))
+            fputc(' ', output);
+        else if (str[i] >= 0x80)
+            fprintf(output, "#%X", str[i]);
+        else
+            fputc(str[i], output);
+    fprintf(output, "...");
+}
+
+/**
+ * xmlDebugDumpAttr:
+ * @output:  the FILE * for the output
+ * @attr:  the attribute
+ * @depth:  the indentation level.
+ *
+ * Dumps debug information for the attribute
+ */
+void
+xmlDebugDumpAttr(FILE *output, xmlAttrPtr attr, int depth) {
+    xmlDebugCtxt ctxt;
+
+    if (output == NULL) return;
+    xmlCtxtDumpInitCtxt(&ctxt);
+    ctxt.output = output;
+    ctxt.depth = depth;
+    xmlCtxtDumpAttr(&ctxt, attr);
+    xmlCtxtDumpCleanCtxt(&ctxt);
+}
+
+
+/**
+ * xmlDebugDumpEntities:
+ * @output:  the FILE * for the output
+ * @doc:  the document
+ *
+ * Dumps debug information for all the entities in use by the document
+ */
+void
+xmlDebugDumpEntities(FILE * output, xmlDocPtr doc)
+{
+    xmlDebugCtxt ctxt;
+
+    if (output == NULL) return;
+    xmlCtxtDumpInitCtxt(&ctxt);
+    ctxt.output = output;
+    xmlCtxtDumpEntities(&ctxt, doc);
+    xmlCtxtDumpCleanCtxt(&ctxt);
+}
+
+/**
+ * xmlDebugDumpAttrList:
+ * @output:  the FILE * for the output
+ * @attr:  the attribute list
+ * @depth:  the indentation level.
+ *
+ * Dumps debug information for the attribute list
+ */
+void
+xmlDebugDumpAttrList(FILE * output, xmlAttrPtr attr, int depth)
+{
+    xmlDebugCtxt ctxt;
+
+    if (output == NULL) return;
+    xmlCtxtDumpInitCtxt(&ctxt);
+    ctxt.output = output;
+    ctxt.depth = depth;
+    xmlCtxtDumpAttrList(&ctxt, attr);
+    xmlCtxtDumpCleanCtxt(&ctxt);
+}
+
+/**
+ * xmlDebugDumpOneNode:
+ * @output:  the FILE * for the output
+ * @node:  the node
+ * @depth:  the indentation level.
+ *
+ * Dumps debug information for the element node, it is not recursive
+ */
+void
+xmlDebugDumpOneNode(FILE * output, xmlNodePtr node, int depth)
+{
+    xmlDebugCtxt ctxt;
+
+    if (output == NULL) return;
+    xmlCtxtDumpInitCtxt(&ctxt);
+    ctxt.output = output;
+    ctxt.depth = depth;
+    xmlCtxtDumpOneNode(&ctxt, node);
+    xmlCtxtDumpCleanCtxt(&ctxt);
+}
+
+/**
+ * xmlDebugDumpNode:
+ * @output:  the FILE * for the output
+ * @node:  the node
+ * @depth:  the indentation level.
+ *
+ * Dumps debug information for the element node, it is recursive
+ */
+void
+xmlDebugDumpNode(FILE * output, xmlNodePtr node, int depth)
+{
+    xmlDebugCtxt ctxt;
+
+    if (output == NULL)
+	output = stdout;
+    xmlCtxtDumpInitCtxt(&ctxt);
+    ctxt.output = output;
+    ctxt.depth = depth;
+    xmlCtxtDumpNode(&ctxt, node);
+    xmlCtxtDumpCleanCtxt(&ctxt);
+}
+
+/**
+ * xmlDebugDumpNodeList:
+ * @output:  the FILE * for the output
+ * @node:  the node list
+ * @depth:  the indentation level.
+ *
+ * Dumps debug information for the list of element node, it is recursive
+ */
+void
+xmlDebugDumpNodeList(FILE * output, xmlNodePtr node, int depth)
+{
+    xmlDebugCtxt ctxt;
+
+    if (output == NULL)
+	output = stdout;
+    xmlCtxtDumpInitCtxt(&ctxt);
+    ctxt.output = output;
+    ctxt.depth = depth;
+    xmlCtxtDumpNodeList(&ctxt, node);
+    xmlCtxtDumpCleanCtxt(&ctxt);
+}
+
+/**
+ * xmlDebugDumpDocumentHead:
+ * @output:  the FILE * for the output
+ * @doc:  the document
+ *
+ * Dumps debug information cncerning the document, not recursive
+ */
+void
+xmlDebugDumpDocumentHead(FILE * output, xmlDocPtr doc)
+{
+    xmlDebugCtxt ctxt;
+
+    if (output == NULL)
+	output = stdout;
+    xmlCtxtDumpInitCtxt(&ctxt);
+    ctxt.options |= DUMP_TEXT_TYPE;
+    ctxt.output = output;
+    xmlCtxtDumpDocumentHead(&ctxt, doc);
+    xmlCtxtDumpCleanCtxt(&ctxt);
+}
+
+/**
+ * xmlDebugDumpDocument:
+ * @output:  the FILE * for the output
+ * @doc:  the document
+ *
+ * Dumps debug information for the document, it's recursive
+ */
+void
+xmlDebugDumpDocument(FILE * output, xmlDocPtr doc)
+{
+    xmlDebugCtxt ctxt;
+
+    if (output == NULL)
+	output = stdout;
+    xmlCtxtDumpInitCtxt(&ctxt);
+    ctxt.options |= DUMP_TEXT_TYPE;
+    ctxt.output = output;
+    xmlCtxtDumpDocument(&ctxt, doc);
+    xmlCtxtDumpCleanCtxt(&ctxt);
+}
+
+/**
+ * xmlDebugDumpDTD:
+ * @output:  the FILE * for the output
+ * @dtd:  the DTD
+ *
+ * Dumps debug information for the DTD
+ */
+void
+xmlDebugDumpDTD(FILE * output, xmlDtdPtr dtd)
+{
+    xmlDebugCtxt ctxt;
+
+    if (output == NULL)
+	output = stdout;
+    xmlCtxtDumpInitCtxt(&ctxt);
+    ctxt.options |= DUMP_TEXT_TYPE;
+    ctxt.output = output;
+    xmlCtxtDumpDTD(&ctxt, dtd);
+    xmlCtxtDumpCleanCtxt(&ctxt);
+}
+
+/************************************************************************
+ *									*
+ *			Public entry points for checkings		*
+ *									*
+ ************************************************************************/
+
+/**
+ * xmlDebugCheckDocument:
+ * @output:  the FILE * for the output
+ * @doc:  the document
+ *
+ * Check the document for potential content problems, and output
+ * the errors to @output
+ *
+ * Returns the number of errors found
+ */
+int
+xmlDebugCheckDocument(FILE * output, xmlDocPtr doc)
+{
+    xmlDebugCtxt ctxt;
+
+    if (output == NULL)
+	output = stdout;
+    xmlCtxtDumpInitCtxt(&ctxt);
+    ctxt.output = output;
+    ctxt.check = 1;
+    xmlCtxtDumpDocument(&ctxt, doc);
+    xmlCtxtDumpCleanCtxt(&ctxt);
+    return(ctxt.errors);
+}
+
+/************************************************************************
+ *									*
+ *			Helpers for Shell				*
+ *									*
+ ************************************************************************/
+
+/**
+ * xmlLsCountNode:
+ * @node:  the node to count
+ *
+ * Count the children of @node.
+ *
+ * Returns the number of children of @node.
+ */
+int
+xmlLsCountNode(xmlNodePtr node) {
+    int ret = 0;
+    xmlNodePtr list = NULL;
+
+    if (node == NULL)
+	return(0);
+
+    switch (node->type) {
+	case XML_ELEMENT_NODE:
+	    list = node->children;
+	    break;
+	case XML_DOCUMENT_NODE:
+	case XML_HTML_DOCUMENT_NODE:
+#ifdef LIBXML_DOCB_ENABLED
+	case XML_DOCB_DOCUMENT_NODE:
+#endif
+	    list = ((xmlDocPtr) node)->children;
+	    break;
+	case XML_ATTRIBUTE_NODE:
+	    list = ((xmlAttrPtr) node)->children;
+	    break;
+	case XML_TEXT_NODE:
+	case XML_CDATA_SECTION_NODE:
+	case XML_PI_NODE:
+	case XML_COMMENT_NODE:
+	    if (node->content != NULL) {
+		ret = xmlStrlen(node->content);
+            }
+	    break;
+	case XML_ENTITY_REF_NODE:
+	case XML_DOCUMENT_TYPE_NODE:
+	case XML_ENTITY_NODE:
+	case XML_DOCUMENT_FRAG_NODE:
+	case XML_NOTATION_NODE:
+	case XML_DTD_NODE:
+        case XML_ELEMENT_DECL:
+        case XML_ATTRIBUTE_DECL:
+        case XML_ENTITY_DECL:
+	case XML_NAMESPACE_DECL:
+	case XML_XINCLUDE_START:
+	case XML_XINCLUDE_END:
+	    ret = 1;
+	    break;
+    }
+    for (;list != NULL;ret++)
+        list = list->next;
+    return(ret);
+}
+
+/**
+ * xmlLsOneNode:
+ * @output:  the FILE * for the output
+ * @node:  the node to dump
+ *
+ * Dump to @output the type and name of @node.
+ */
+void
+xmlLsOneNode(FILE *output, xmlNodePtr node) {
+    if (output == NULL) return;
+    if (node == NULL) {
+	fprintf(output, "NULL\n");
+	return;
+    }
+    switch (node->type) {
+	case XML_ELEMENT_NODE:
+	    fprintf(output, "-");
+	    break;
+	case XML_ATTRIBUTE_NODE:
+	    fprintf(output, "a");
+	    break;
+	case XML_TEXT_NODE:
+	    fprintf(output, "t");
+	    break;
+	case XML_CDATA_SECTION_NODE:
+	    fprintf(output, "C");
+	    break;
+	case XML_ENTITY_REF_NODE:
+	    fprintf(output, "e");
+	    break;
+	case XML_ENTITY_NODE:
+	    fprintf(output, "E");
+	    break;
+	case XML_PI_NODE:
+	    fprintf(output, "p");
+	    break;
+	case XML_COMMENT_NODE:
+	    fprintf(output, "c");
+	    break;
+	case XML_DOCUMENT_NODE:
+	    fprintf(output, "d");
+	    break;
+	case XML_HTML_DOCUMENT_NODE:
+	    fprintf(output, "h");
+	    break;
+	case XML_DOCUMENT_TYPE_NODE:
+	    fprintf(output, "T");
+	    break;
+	case XML_DOCUMENT_FRAG_NODE:
+	    fprintf(output, "F");
+	    break;
+	case XML_NOTATION_NODE:
+	    fprintf(output, "N");
+	    break;
+	case XML_NAMESPACE_DECL:
+	    fprintf(output, "n");
+	    break;
+	default:
+	    fprintf(output, "?");
+    }
+    if (node->type != XML_NAMESPACE_DECL) {
+	if (node->properties != NULL)
+	    fprintf(output, "a");
+	else
+	    fprintf(output, "-");
+	if (node->nsDef != NULL)
+	    fprintf(output, "n");
+	else
+	    fprintf(output, "-");
+    }
+
+    fprintf(output, " %8d ", xmlLsCountNode(node));
+
+    switch (node->type) {
+	case XML_ELEMENT_NODE:
+	    if (node->name != NULL) {
+                if ((node->ns != NULL) && (node->ns->prefix != NULL))
+                    fprintf(output, "%s:", node->ns->prefix);
+		fprintf(output, "%s", (const char *) node->name);
+            }
+	    break;
+	case XML_ATTRIBUTE_NODE:
+	    if (node->name != NULL)
+		fprintf(output, "%s", (const char *) node->name);
+	    break;
+	case XML_TEXT_NODE:
+	    if (node->content != NULL) {
+		xmlDebugDumpString(output, node->content);
+            }
+	    break;
+	case XML_CDATA_SECTION_NODE:
+	    break;
+	case XML_ENTITY_REF_NODE:
+	    if (node->name != NULL)
+		fprintf(output, "%s", (const char *) node->name);
+	    break;
+	case XML_ENTITY_NODE:
+	    if (node->name != NULL)
+		fprintf(output, "%s", (const char *) node->name);
+	    break;
+	case XML_PI_NODE:
+	    if (node->name != NULL)
+		fprintf(output, "%s", (const char *) node->name);
+	    break;
+	case XML_COMMENT_NODE:
+	    break;
+	case XML_DOCUMENT_NODE:
+	    break;
+	case XML_HTML_DOCUMENT_NODE:
+	    break;
+	case XML_DOCUMENT_TYPE_NODE:
+	    break;
+	case XML_DOCUMENT_FRAG_NODE:
+	    break;
+	case XML_NOTATION_NODE:
+	    break;
+	case XML_NAMESPACE_DECL: {
+	    xmlNsPtr ns = (xmlNsPtr) node;
+
+	    if (ns->prefix == NULL)
+		fprintf(output, "default -> %s", (char *)ns->href);
+	    else
+		fprintf(output, "%s -> %s", (char *)ns->prefix,
+			(char *)ns->href);
+	    break;
+	}
+	default:
+	    if (node->name != NULL)
+		fprintf(output, "%s", (const char *) node->name);
+    }
+    fprintf(output, "\n");
+}
+
+/**
+ * xmlBoolToText:
+ * @boolval: a bool to turn into text
+ *
+ * Convenient way to turn bool into text
+ *
+ * Returns a pointer to either "True" or "False"
+ */
+const char *
+xmlBoolToText(int boolval)
+{
+    if (boolval)
+        return("True");
+    else
+        return("False");
+}
+
+#ifdef LIBXML_XPATH_ENABLED
+/****************************************************************
+ *								*
+ *		The XML shell related functions			*
+ *								*
+ ****************************************************************/
+
+
+
+/*
+ * TODO: Improvement/cleanups for the XML shell
+ *     - allow to shell out an editor on a subpart
+ *     - cleanup function registrations (with help) and calling
+ *     - provide registration routines
+ */
+
+/**
+ * xmlShellPrintXPathError:
+ * @errorType: valid xpath error id
+ * @arg: the argument that cause xpath to fail
+ *
+ * Print the xpath error to libxml default error channel
+ */
+void
+xmlShellPrintXPathError(int errorType, const char *arg)
+{
+    const char *default_arg = "Result";
+
+    if (!arg)
+        arg = default_arg;
+
+    switch (errorType) {
+        case XPATH_UNDEFINED:
+            xmlGenericError(xmlGenericErrorContext,
+                            "%s: no such node\n", arg);
+            break;
+
+        case XPATH_BOOLEAN:
+            xmlGenericError(xmlGenericErrorContext,
+                            "%s is a Boolean\n", arg);
+            break;
+        case XPATH_NUMBER:
+            xmlGenericError(xmlGenericErrorContext,
+                            "%s is a number\n", arg);
+            break;
+        case XPATH_STRING:
+            xmlGenericError(xmlGenericErrorContext,
+                            "%s is a string\n", arg);
+            break;
+        case XPATH_POINT:
+            xmlGenericError(xmlGenericErrorContext,
+                            "%s is a point\n", arg);
+            break;
+        case XPATH_RANGE:
+            xmlGenericError(xmlGenericErrorContext,
+                            "%s is a range\n", arg);
+            break;
+        case XPATH_LOCATIONSET:
+            xmlGenericError(xmlGenericErrorContext,
+                            "%s is a range\n", arg);
+            break;
+        case XPATH_USERS:
+            xmlGenericError(xmlGenericErrorContext,
+                            "%s is user-defined\n", arg);
+            break;
+        case XPATH_XSLT_TREE:
+            xmlGenericError(xmlGenericErrorContext,
+                            "%s is an XSLT value tree\n", arg);
+            break;
+    }
+#if 0
+    xmlGenericError(xmlGenericErrorContext,
+                    "Try casting the result string function (xpath builtin)\n",
+                    arg);
+#endif
+}
+
+
+#ifdef LIBXML_OUTPUT_ENABLED
+/**
+ * xmlShellPrintNodeCtxt:
+ * @ctxt : a non-null shell context
+ * @node : a non-null node to print to the output FILE
+ *
+ * Print node to the output FILE
+ */
+static void
+xmlShellPrintNodeCtxt(xmlShellCtxtPtr ctxt,xmlNodePtr node)
+{
+    FILE *fp;
+
+    if (!node)
+        return;
+    if (ctxt == NULL)
+	fp = stdout;
+    else
+	fp = ctxt->output;
+
+    if (node->type == XML_DOCUMENT_NODE)
+        xmlDocDump(fp, (xmlDocPtr) node);
+    else if (node->type == XML_ATTRIBUTE_NODE)
+        xmlDebugDumpAttrList(fp, (xmlAttrPtr) node, 0);
+    else
+        xmlElemDump(fp, node->doc, node);
+
+    fprintf(fp, "\n");
+}
+
+/**
+ * xmlShellPrintNode:
+ * @node : a non-null node to print to the output FILE
+ *
+ * Print node to the output FILE
+ */
+void
+xmlShellPrintNode(xmlNodePtr node)
+{
+    xmlShellPrintNodeCtxt(NULL, node);
+}
+#endif /* LIBXML_OUTPUT_ENABLED */
+
+/**
+ * xmlShellPrintXPathResultCtxt:
+ * @ctxt: a valid shell context
+ * @list: a valid result generated by an xpath evaluation
+ *
+ * Prints result to the output FILE
+ */
+static void
+xmlShellPrintXPathResultCtxt(xmlShellCtxtPtr ctxt,xmlXPathObjectPtr list)
+{
+    if (!ctxt)
+       return;
+
+    if (list != NULL) {
+        switch (list->type) {
+            case XPATH_NODESET:{
+#ifdef LIBXML_OUTPUT_ENABLED
+                    int indx;
+
+                    if (list->nodesetval) {
+                        for (indx = 0; indx < list->nodesetval->nodeNr;
+                             indx++) {
+                            xmlShellPrintNodeCtxt(ctxt,
+				    list->nodesetval->nodeTab[indx]);
+                        }
+                    } else {
+                        xmlGenericError(xmlGenericErrorContext,
+                                        "Empty node set\n");
+                    }
+                    break;
+#else
+		    xmlGenericError(xmlGenericErrorContext,
+				    "Node set\n");
+#endif /* LIBXML_OUTPUT_ENABLED */
+                }
+            case XPATH_BOOLEAN:
+                xmlGenericError(xmlGenericErrorContext,
+                                "Is a Boolean:%s\n",
+                                xmlBoolToText(list->boolval));
+                break;
+            case XPATH_NUMBER:
+                xmlGenericError(xmlGenericErrorContext,
+                                "Is a number:%0g\n", list->floatval);
+                break;
+            case XPATH_STRING:
+                xmlGenericError(xmlGenericErrorContext,
+                                "Is a string:%s\n", list->stringval);
+                break;
+
+            default:
+                xmlShellPrintXPathError(list->type, NULL);
+        }
+    }
+}
+
+/**
+ * xmlShellPrintXPathResult:
+ * @list: a valid result generated by an xpath evaluation
+ *
+ * Prints result to the output FILE
+ */
+void
+xmlShellPrintXPathResult(xmlXPathObjectPtr list)
+{
+    xmlShellPrintXPathResultCtxt(NULL, list);
+}
+
+/**
+ * xmlShellList:
+ * @ctxt:  the shell context
+ * @arg:  unused
+ * @node:  a node
+ * @node2:  unused
+ *
+ * Implements the XML shell function "ls"
+ * Does an Unix like listing of the given node (like a directory)
+ *
+ * Returns 0
+ */
+int
+xmlShellList(xmlShellCtxtPtr ctxt,
+             char *arg ATTRIBUTE_UNUSED, xmlNodePtr node,
+             xmlNodePtr node2 ATTRIBUTE_UNUSED)
+{
+    xmlNodePtr cur;
+    if (!ctxt)
+        return (0);
+    if (node == NULL) {
+	fprintf(ctxt->output, "NULL\n");
+	return (0);
+    }
+    if ((node->type == XML_DOCUMENT_NODE) ||
+        (node->type == XML_HTML_DOCUMENT_NODE)) {
+        cur = ((xmlDocPtr) node)->children;
+    } else if (node->type == XML_NAMESPACE_DECL) {
+        xmlLsOneNode(ctxt->output, node);
+        return (0);
+    } else if (node->children != NULL) {
+        cur = node->children;
+    } else {
+        xmlLsOneNode(ctxt->output, node);
+        return (0);
+    }
+    while (cur != NULL) {
+        xmlLsOneNode(ctxt->output, cur);
+        cur = cur->next;
+    }
+    return (0);
+}
+
+/**
+ * xmlShellBase:
+ * @ctxt:  the shell context
+ * @arg:  unused
+ * @node:  a node
+ * @node2:  unused
+ *
+ * Implements the XML shell function "base"
+ * dumps the current XML base of the node
+ *
+ * Returns 0
+ */
+int
+xmlShellBase(xmlShellCtxtPtr ctxt,
+             char *arg ATTRIBUTE_UNUSED, xmlNodePtr node,
+             xmlNodePtr node2 ATTRIBUTE_UNUSED)
+{
+    xmlChar *base;
+    if (!ctxt)
+        return 0;
+    if (node == NULL) {
+	fprintf(ctxt->output, "NULL\n");
+	return (0);
+    }
+
+    base = xmlNodeGetBase(node->doc, node);
+
+    if (base == NULL) {
+        fprintf(ctxt->output, " No base found !!!\n");
+    } else {
+        fprintf(ctxt->output, "%s\n", base);
+        xmlFree(base);
+    }
+    return (0);
+}
+
+#ifdef LIBXML_TREE_ENABLED
+/**
+ * xmlShellSetBase:
+ * @ctxt:  the shell context
+ * @arg:  the new base
+ * @node:  a node
+ * @node2:  unused
+ *
+ * Implements the XML shell function "setbase"
+ * change the current XML base of the node
+ *
+ * Returns 0
+ */
+static int
+xmlShellSetBase(xmlShellCtxtPtr ctxt ATTRIBUTE_UNUSED,
+             char *arg ATTRIBUTE_UNUSED, xmlNodePtr node,
+             xmlNodePtr node2 ATTRIBUTE_UNUSED)
+{
+    xmlNodeSetBase(node, (xmlChar*) arg);
+    return (0);
+}
+#endif
+
+#ifdef LIBXML_XPATH_ENABLED
+/**
+ * xmlShellRegisterNamespace:
+ * @ctxt:  the shell context
+ * @arg:  a string in prefix=nsuri format
+ * @node:  unused
+ * @node2:  unused
+ *
+ * Implements the XML shell function "setns"
+ * register/unregister a prefix=namespace pair
+ * on the XPath context
+ *
+ * Returns 0 on success and a negative value otherwise.
+ */
+static int
+xmlShellRegisterNamespace(xmlShellCtxtPtr ctxt, char *arg,
+      xmlNodePtr node ATTRIBUTE_UNUSED, xmlNodePtr node2 ATTRIBUTE_UNUSED)
+{
+    xmlChar* nsListDup;
+    xmlChar* prefix;
+    xmlChar* href;
+    xmlChar* next;
+
+    nsListDup = xmlStrdup((xmlChar *) arg);
+    next = nsListDup;
+    while(next != NULL) {
+	/* skip spaces */
+	/*while((*next) == ' ') next++;*/
+	if((*next) == '\0') break;
+
+	/* find prefix */
+	prefix = next;
+	next = (xmlChar*)xmlStrchr(next, '=');
+	if(next == NULL) {
+	    fprintf(ctxt->output, "setns: prefix=[nsuri] required\n");
+	    xmlFree(nsListDup);
+	    return(-1);
+	}
+	*(next++) = '\0';
+
+	/* find href */
+	href = next;
+	next = (xmlChar*)xmlStrchr(next, ' ');
+	if(next != NULL) {
+	    *(next++) = '\0';
+	}
+
+	/* do register namespace */
+	if(xmlXPathRegisterNs(ctxt->pctxt, prefix, href) != 0) {
+	    fprintf(ctxt->output,"Error: unable to register NS with prefix=\"%s\" and href=\"%s\"\n", prefix, href);
+	    xmlFree(nsListDup);
+	    return(-1);
+	}
+    }
+
+    xmlFree(nsListDup);
+    return(0);
+}
+/**
+ * xmlShellRegisterRootNamespaces:
+ * @ctxt:  the shell context
+ * @arg:  unused
+ * @node:  the root element
+ * @node2:  unused
+ *
+ * Implements the XML shell function "setrootns"
+ * which registers all namespaces declarations found on the root element.
+ *
+ * Returns 0 on success and a negative value otherwise.
+ */
+static int
+xmlShellRegisterRootNamespaces(xmlShellCtxtPtr ctxt, char *arg ATTRIBUTE_UNUSED,
+      xmlNodePtr root, xmlNodePtr node2 ATTRIBUTE_UNUSED)
+{
+    xmlNsPtr ns;
+
+    if ((root == NULL) || (root->type != XML_ELEMENT_NODE) ||
+        (root->nsDef == NULL) || (ctxt == NULL) || (ctxt->pctxt == NULL))
+	return(-1);
+    ns = root->nsDef;
+    while (ns != NULL) {
+        if (ns->prefix == NULL)
+	    xmlXPathRegisterNs(ctxt->pctxt, BAD_CAST "defaultns", ns->href);
+	else
+	    xmlXPathRegisterNs(ctxt->pctxt, ns->prefix, ns->href);
+        ns = ns->next;
+    }
+    return(0);
+}
+#endif
+
+/**
+ * xmlShellGrep:
+ * @ctxt:  the shell context
+ * @arg:  the string or regular expression to find
+ * @node:  a node
+ * @node2:  unused
+ *
+ * Implements the XML shell function "grep"
+ * dumps informations about the node (namespace, attributes, content).
+ *
+ * Returns 0
+ */
+static int
+xmlShellGrep(xmlShellCtxtPtr ctxt ATTRIBUTE_UNUSED,
+            char *arg, xmlNodePtr node, xmlNodePtr node2 ATTRIBUTE_UNUSED)
+{
+    if (!ctxt)
+        return (0);
+    if (node == NULL)
+	return (0);
+    if (arg == NULL)
+	return (0);
+#ifdef LIBXML_REGEXP_ENABLED
+    if ((xmlStrchr((xmlChar *) arg, '?')) ||
+	(xmlStrchr((xmlChar *) arg, '*')) ||
+	(xmlStrchr((xmlChar *) arg, '.')) ||
+	(xmlStrchr((xmlChar *) arg, '['))) {
+    }
+#endif
+    while (node != NULL) {
+        if (node->type == XML_COMMENT_NODE) {
+	    if (xmlStrstr(node->content, (xmlChar *) arg)) {
+
+		fprintf(ctxt->output, "%s : ", xmlGetNodePath(node));
+                xmlShellList(ctxt, NULL, node, NULL);
+	    }
+        } else if (node->type == XML_TEXT_NODE) {
+	    if (xmlStrstr(node->content, (xmlChar *) arg)) {
+
+		fprintf(ctxt->output, "%s : ", xmlGetNodePath(node->parent));
+                xmlShellList(ctxt, NULL, node->parent, NULL);
+	    }
+        }
+
+        /*
+         * Browse the full subtree, deep first
+         */
+
+        if ((node->type == XML_DOCUMENT_NODE) ||
+            (node->type == XML_HTML_DOCUMENT_NODE)) {
+            node = ((xmlDocPtr) node)->children;
+        } else if ((node->children != NULL)
+                   && (node->type != XML_ENTITY_REF_NODE)) {
+            /* deep first */
+            node = node->children;
+        } else if (node->next != NULL) {
+            /* then siblings */
+            node = node->next;
+        } else {
+            /* go up to parents->next if needed */
+            while (node != NULL) {
+                if (node->parent != NULL) {
+                    node = node->parent;
+                }
+                if (node->next != NULL) {
+                    node = node->next;
+                    break;
+                }
+                if (node->parent == NULL) {
+                    node = NULL;
+                    break;
+                }
+            }
+	}
+    }
+    return (0);
+}
+
+/**
+ * xmlShellDir:
+ * @ctxt:  the shell context
+ * @arg:  unused
+ * @node:  a node
+ * @node2:  unused
+ *
+ * Implements the XML shell function "dir"
+ * dumps informations about the node (namespace, attributes, content).
+ *
+ * Returns 0
+ */
+int
+xmlShellDir(xmlShellCtxtPtr ctxt ATTRIBUTE_UNUSED,
+            char *arg ATTRIBUTE_UNUSED, xmlNodePtr node,
+            xmlNodePtr node2 ATTRIBUTE_UNUSED)
+{
+    if (!ctxt)
+        return (0);
+    if (node == NULL) {
+	fprintf(ctxt->output, "NULL\n");
+	return (0);
+    }
+    if ((node->type == XML_DOCUMENT_NODE) ||
+        (node->type == XML_HTML_DOCUMENT_NODE)) {
+        xmlDebugDumpDocumentHead(ctxt->output, (xmlDocPtr) node);
+    } else if (node->type == XML_ATTRIBUTE_NODE) {
+        xmlDebugDumpAttr(ctxt->output, (xmlAttrPtr) node, 0);
+    } else {
+        xmlDebugDumpOneNode(ctxt->output, node, 0);
+    }
+    return (0);
+}
+
+/**
+ * xmlShellSetContent:
+ * @ctxt:  the shell context
+ * @value:  the content as a string
+ * @node:  a node
+ * @node2:  unused
+ *
+ * Implements the XML shell function "dir"
+ * dumps informations about the node (namespace, attributes, content).
+ *
+ * Returns 0
+ */
+static int
+xmlShellSetContent(xmlShellCtxtPtr ctxt ATTRIBUTE_UNUSED,
+            char *value, xmlNodePtr node,
+            xmlNodePtr node2 ATTRIBUTE_UNUSED)
+{
+    xmlNodePtr results;
+    xmlParserErrors ret;
+
+    if (!ctxt)
+        return (0);
+    if (node == NULL) {
+	fprintf(ctxt->output, "NULL\n");
+	return (0);
+    }
+    if (value == NULL) {
+        fprintf(ctxt->output, "NULL\n");
+	return (0);
+    }
+
+    ret = xmlParseInNodeContext(node, value, strlen(value), 0, &results);
+    if (ret == XML_ERR_OK) {
+	if (node->children != NULL) {
+	    xmlFreeNodeList(node->children);
+	    node->children = NULL;
+	    node->last = NULL;
+	}
+	xmlAddChildList(node, results);
+    } else {
+        fprintf(ctxt->output, "failed to parse content\n");
+    }
+    return (0);
+}
+
+#ifdef LIBXML_SCHEMAS_ENABLED
+/**
+ * xmlShellRNGValidate:
+ * @ctxt:  the shell context
+ * @schemas:  the path to the Relax-NG schemas
+ * @node:  a node
+ * @node2:  unused
+ *
+ * Implements the XML shell function "relaxng"
+ * validating the instance against a Relax-NG schemas
+ *
+ * Returns 0
+ */
+static int
+xmlShellRNGValidate(xmlShellCtxtPtr sctxt, char *schemas,
+            xmlNodePtr node ATTRIBUTE_UNUSED,
+	    xmlNodePtr node2 ATTRIBUTE_UNUSED)
+{
+    xmlRelaxNGPtr relaxngschemas;
+    xmlRelaxNGParserCtxtPtr ctxt;
+    xmlRelaxNGValidCtxtPtr vctxt;
+    int ret;
+
+    ctxt = xmlRelaxNGNewParserCtxt(schemas);
+    xmlRelaxNGSetParserErrors(ctxt,
+	    (xmlRelaxNGValidityErrorFunc) fprintf,
+	    (xmlRelaxNGValidityWarningFunc) fprintf,
+	    stderr);
+    relaxngschemas = xmlRelaxNGParse(ctxt);
+    xmlRelaxNGFreeParserCtxt(ctxt);
+    if (relaxngschemas == NULL) {
+	xmlGenericError(xmlGenericErrorContext,
+		"Relax-NG schema %s failed to compile\n", schemas);
+	return(-1);
+    }
+    vctxt = xmlRelaxNGNewValidCtxt(relaxngschemas);
+    xmlRelaxNGSetValidErrors(vctxt,
+	    (xmlRelaxNGValidityErrorFunc) fprintf,
+	    (xmlRelaxNGValidityWarningFunc) fprintf,
+	    stderr);
+    ret = xmlRelaxNGValidateDoc(vctxt, sctxt->doc);
+    if (ret == 0) {
+	fprintf(stderr, "%s validates\n", sctxt->filename);
+    } else if (ret > 0) {
+	fprintf(stderr, "%s fails to validate\n", sctxt->filename);
+    } else {
+	fprintf(stderr, "%s validation generated an internal error\n",
+	       sctxt->filename);
+    }
+    xmlRelaxNGFreeValidCtxt(vctxt);
+    if (relaxngschemas != NULL)
+	xmlRelaxNGFree(relaxngschemas);
+    return(0);
+}
+#endif
+
+#ifdef LIBXML_OUTPUT_ENABLED
+/**
+ * xmlShellCat:
+ * @ctxt:  the shell context
+ * @arg:  unused
+ * @node:  a node
+ * @node2:  unused
+ *
+ * Implements the XML shell function "cat"
+ * dumps the serialization node content (XML or HTML).
+ *
+ * Returns 0
+ */
+int
+xmlShellCat(xmlShellCtxtPtr ctxt, char *arg ATTRIBUTE_UNUSED,
+            xmlNodePtr node, xmlNodePtr node2 ATTRIBUTE_UNUSED)
+{
+    if (!ctxt)
+        return (0);
+    if (node == NULL) {
+	fprintf(ctxt->output, "NULL\n");
+	return (0);
+    }
+    if (ctxt->doc->type == XML_HTML_DOCUMENT_NODE) {
+#ifdef LIBXML_HTML_ENABLED
+        if (node->type == XML_HTML_DOCUMENT_NODE)
+            htmlDocDump(ctxt->output, (htmlDocPtr) node);
+        else
+            htmlNodeDumpFile(ctxt->output, ctxt->doc, node);
+#else
+        if (node->type == XML_DOCUMENT_NODE)
+            xmlDocDump(ctxt->output, (xmlDocPtr) node);
+        else
+            xmlElemDump(ctxt->output, ctxt->doc, node);
+#endif /* LIBXML_HTML_ENABLED */
+    } else {
+        if (node->type == XML_DOCUMENT_NODE)
+            xmlDocDump(ctxt->output, (xmlDocPtr) node);
+        else
+            xmlElemDump(ctxt->output, ctxt->doc, node);
+    }
+    fprintf(ctxt->output, "\n");
+    return (0);
+}
+#endif /* LIBXML_OUTPUT_ENABLED */
+
+/**
+ * xmlShellLoad:
+ * @ctxt:  the shell context
+ * @filename:  the file name
+ * @node:  unused
+ * @node2:  unused
+ *
+ * Implements the XML shell function "load"
+ * loads a new document specified by the filename
+ *
+ * Returns 0 or -1 if loading failed
+ */
+int
+xmlShellLoad(xmlShellCtxtPtr ctxt, char *filename,
+             xmlNodePtr node ATTRIBUTE_UNUSED,
+             xmlNodePtr node2 ATTRIBUTE_UNUSED)
+{
+    xmlDocPtr doc;
+    int html = 0;
+
+    if ((ctxt == NULL) || (filename == NULL)) return(-1);
+    if (ctxt->doc != NULL)
+        html = (ctxt->doc->type == XML_HTML_DOCUMENT_NODE);
+
+    if (html) {
+#ifdef LIBXML_HTML_ENABLED
+        doc = htmlParseFile(filename, NULL);
+#else
+        fprintf(ctxt->output, "HTML support not compiled in\n");
+        doc = NULL;
+#endif /* LIBXML_HTML_ENABLED */
+    } else {
+        doc = xmlReadFile(filename,NULL,0);
+    }
+    if (doc != NULL) {
+        if (ctxt->loaded == 1) {
+            xmlFreeDoc(ctxt->doc);
+        }
+        ctxt->loaded = 1;
+#ifdef LIBXML_XPATH_ENABLED
+        xmlXPathFreeContext(ctxt->pctxt);
+#endif /* LIBXML_XPATH_ENABLED */
+        xmlFree(ctxt->filename);
+        ctxt->doc = doc;
+        ctxt->node = (xmlNodePtr) doc;
+#ifdef LIBXML_XPATH_ENABLED
+        ctxt->pctxt = xmlXPathNewContext(doc);
+#endif /* LIBXML_XPATH_ENABLED */
+        ctxt->filename = (char *) xmlCanonicPath((xmlChar *) filename);
+    } else
+        return (-1);
+    return (0);
+}
+
+#ifdef LIBXML_OUTPUT_ENABLED
+/**
+ * xmlShellWrite:
+ * @ctxt:  the shell context
+ * @filename:  the file name
+ * @node:  a node in the tree
+ * @node2:  unused
+ *
+ * Implements the XML shell function "write"
+ * Write the current node to the filename, it saves the serialization
+ * of the subtree under the @node specified
+ *
+ * Returns 0 or -1 in case of error
+ */
+int
+xmlShellWrite(xmlShellCtxtPtr ctxt, char *filename, xmlNodePtr node,
+              xmlNodePtr node2 ATTRIBUTE_UNUSED)
+{
+    if (node == NULL)
+        return (-1);
+    if ((filename == NULL) || (filename[0] == 0)) {
+        return (-1);
+    }
+#ifdef W_OK
+    if (access((char *) filename, W_OK)) {
+        xmlGenericError(xmlGenericErrorContext,
+                        "Cannot write to %s\n", filename);
+        return (-1);
+    }
+#endif
+    switch (node->type) {
+        case XML_DOCUMENT_NODE:
+            if (xmlSaveFile((char *) filename, ctxt->doc) < -1) {
+                xmlGenericError(xmlGenericErrorContext,
+                                "Failed to write to %s\n", filename);
+                return (-1);
+            }
+            break;
+        case XML_HTML_DOCUMENT_NODE:
+#ifdef LIBXML_HTML_ENABLED
+            if (htmlSaveFile((char *) filename, ctxt->doc) < 0) {
+                xmlGenericError(xmlGenericErrorContext,
+                                "Failed to write to %s\n", filename);
+                return (-1);
+            }
+#else
+            if (xmlSaveFile((char *) filename, ctxt->doc) < -1) {
+                xmlGenericError(xmlGenericErrorContext,
+                                "Failed to write to %s\n", filename);
+                return (-1);
+            }
+#endif /* LIBXML_HTML_ENABLED */
+            break;
+        default:{
+                FILE *f;
+
+                f = fopen((char *) filename, "w");
+                if (f == NULL) {
+                    xmlGenericError(xmlGenericErrorContext,
+                                    "Failed to write to %s\n", filename);
+                    return (-1);
+                }
+                xmlElemDump(f, ctxt->doc, node);
+                fclose(f);
+            }
+    }
+    return (0);
+}
+
+/**
+ * xmlShellSave:
+ * @ctxt:  the shell context
+ * @filename:  the file name (optional)
+ * @node:  unused
+ * @node2:  unused
+ *
+ * Implements the XML shell function "save"
+ * Write the current document to the filename, or it's original name
+ *
+ * Returns 0 or -1 in case of error
+ */
+int
+xmlShellSave(xmlShellCtxtPtr ctxt, char *filename,
+             xmlNodePtr node ATTRIBUTE_UNUSED,
+             xmlNodePtr node2 ATTRIBUTE_UNUSED)
+{
+    if ((ctxt == NULL) || (ctxt->doc == NULL))
+        return (-1);
+    if ((filename == NULL) || (filename[0] == 0))
+        filename = ctxt->filename;
+    if (filename == NULL)
+        return (-1);
+#ifdef W_OK
+    if (access((char *) filename, W_OK)) {
+        xmlGenericError(xmlGenericErrorContext,
+                        "Cannot save to %s\n", filename);
+        return (-1);
+    }
+#endif
+    switch (ctxt->doc->type) {
+        case XML_DOCUMENT_NODE:
+            if (xmlSaveFile((char *) filename, ctxt->doc) < 0) {
+                xmlGenericError(xmlGenericErrorContext,
+                                "Failed to save to %s\n", filename);
+            }
+            break;
+        case XML_HTML_DOCUMENT_NODE:
+#ifdef LIBXML_HTML_ENABLED
+            if (htmlSaveFile((char *) filename, ctxt->doc) < 0) {
+                xmlGenericError(xmlGenericErrorContext,
+                                "Failed to save to %s\n", filename);
+            }
+#else
+            if (xmlSaveFile((char *) filename, ctxt->doc) < 0) {
+                xmlGenericError(xmlGenericErrorContext,
+                                "Failed to save to %s\n", filename);
+            }
+#endif /* LIBXML_HTML_ENABLED */
+            break;
+        default:
+            xmlGenericError(xmlGenericErrorContext,
+	    "To save to subparts of a document use the 'write' command\n");
+            return (-1);
+
+    }
+    return (0);
+}
+#endif /* LIBXML_OUTPUT_ENABLED */
+
+#ifdef LIBXML_VALID_ENABLED
+/**
+ * xmlShellValidate:
+ * @ctxt:  the shell context
+ * @dtd:  the DTD URI (optional)
+ * @node:  unused
+ * @node2:  unused
+ *
+ * Implements the XML shell function "validate"
+ * Validate the document, if a DTD path is provided, then the validation
+ * is done against the given DTD.
+ *
+ * Returns 0 or -1 in case of error
+ */
+int
+xmlShellValidate(xmlShellCtxtPtr ctxt, char *dtd,
+                 xmlNodePtr node ATTRIBUTE_UNUSED,
+                 xmlNodePtr node2 ATTRIBUTE_UNUSED)
+{
+    xmlValidCtxt vctxt;
+    int res = -1;
+
+    if ((ctxt == NULL) || (ctxt->doc == NULL)) return(-1);
+    vctxt.userData = stderr;
+    vctxt.error = (xmlValidityErrorFunc) fprintf;
+    vctxt.warning = (xmlValidityWarningFunc) fprintf;
+
+    if ((dtd == NULL) || (dtd[0] == 0)) {
+        res = xmlValidateDocument(&vctxt, ctxt->doc);
+    } else {
+        xmlDtdPtr subset;
+
+        subset = xmlParseDTD(NULL, (xmlChar *) dtd);
+        if (subset != NULL) {
+            res = xmlValidateDtd(&vctxt, ctxt->doc, subset);
+
+            xmlFreeDtd(subset);
+        }
+    }
+    return (res);
+}
+#endif /* LIBXML_VALID_ENABLED */
+
+/**
+ * xmlShellDu:
+ * @ctxt:  the shell context
+ * @arg:  unused
+ * @tree:  a node defining a subtree
+ * @node2:  unused
+ *
+ * Implements the XML shell function "du"
+ * show the structure of the subtree under node @tree
+ * If @tree is null, the command works on the current node.
+ *
+ * Returns 0 or -1 in case of error
+ */
+int
+xmlShellDu(xmlShellCtxtPtr ctxt,
+           char *arg ATTRIBUTE_UNUSED, xmlNodePtr tree,
+           xmlNodePtr node2 ATTRIBUTE_UNUSED)
+{
+    xmlNodePtr node;
+    int indent = 0, i;
+
+    if (!ctxt)
+	return (-1);
+
+    if (tree == NULL)
+        return (-1);
+    node = tree;
+    while (node != NULL) {
+        if ((node->type == XML_DOCUMENT_NODE) ||
+            (node->type == XML_HTML_DOCUMENT_NODE)) {
+            fprintf(ctxt->output, "/\n");
+        } else if (node->type == XML_ELEMENT_NODE) {
+            for (i = 0; i < indent; i++)
+                fprintf(ctxt->output, "  ");
+            if ((node->ns) && (node->ns->prefix))
+                fprintf(ctxt->output, "%s:", node->ns->prefix);
+            fprintf(ctxt->output, "%s\n", node->name);
+        } else {
+        }
+
+        /*
+         * Browse the full subtree, deep first
+         */
+
+        if ((node->type == XML_DOCUMENT_NODE) ||
+            (node->type == XML_HTML_DOCUMENT_NODE)) {
+            node = ((xmlDocPtr) node)->children;
+        } else if ((node->children != NULL)
+                   && (node->type != XML_ENTITY_REF_NODE)) {
+            /* deep first */
+            node = node->children;
+            indent++;
+        } else if ((node != tree) && (node->next != NULL)) {
+            /* then siblings */
+            node = node->next;
+        } else if (node != tree) {
+            /* go up to parents->next if needed */
+            while (node != tree) {
+                if (node->parent != NULL) {
+                    node = node->parent;
+                    indent--;
+                }
+                if ((node != tree) && (node->next != NULL)) {
+                    node = node->next;
+                    break;
+                }
+                if (node->parent == NULL) {
+                    node = NULL;
+                    break;
+                }
+                if (node == tree) {
+                    node = NULL;
+                    break;
+                }
+            }
+            /* exit condition */
+            if (node == tree)
+                node = NULL;
+        } else
+            node = NULL;
+    }
+    return (0);
+}
+
+/**
+ * xmlShellPwd:
+ * @ctxt:  the shell context
+ * @buffer:  the output buffer
+ * @node:  a node
+ * @node2:  unused
+ *
+ * Implements the XML shell function "pwd"
+ * Show the full path from the root to the node, if needed building
+ * thumblers when similar elements exists at a given ancestor level.
+ * The output is compatible with XPath commands.
+ *
+ * Returns 0 or -1 in case of error
+ */
+int
+xmlShellPwd(xmlShellCtxtPtr ctxt ATTRIBUTE_UNUSED, char *buffer,
+            xmlNodePtr node, xmlNodePtr node2 ATTRIBUTE_UNUSED)
+{
+    xmlChar *path;
+
+    if ((node == NULL) || (buffer == NULL))
+        return (-1);
+
+    path = xmlGetNodePath(node);
+    if (path == NULL)
+	return (-1);
+
+    /*
+     * This test prevents buffer overflow, because this routine
+     * is only called by xmlShell, in which the second argument is
+     * 500 chars long.
+     * It is a dirty hack before a cleaner solution is found.
+     * Documentation should mention that the second argument must
+     * be at least 500 chars long, and could be stripped if too long.
+     */
+    snprintf(buffer, 499, "%s", path);
+    buffer[499] = '0';
+    xmlFree(path);
+
+    return (0);
+}
+
+/**
+ * xmlShell:
+ * @doc:  the initial document
+ * @filename:  the output buffer
+ * @input:  the line reading function
+ * @output:  the output FILE*, defaults to stdout if NULL
+ *
+ * Implements the XML shell
+ * This allow to load, validate, view, modify and save a document
+ * using a environment similar to a UNIX commandline.
+ */
+void
+xmlShell(xmlDocPtr doc, char *filename, xmlShellReadlineFunc input,
+         FILE * output)
+{
+    char prompt[500] = "/ > ";
+    char *cmdline = NULL, *cur;
+    char command[100];
+    char arg[400];
+    int i;
+    xmlShellCtxtPtr ctxt;
+    xmlXPathObjectPtr list;
+
+    if (doc == NULL)
+        return;
+    if (filename == NULL)
+        return;
+    if (input == NULL)
+        return;
+    if (output == NULL)
+        output = stdout;
+    ctxt = (xmlShellCtxtPtr) xmlMalloc(sizeof(xmlShellCtxt));
+    if (ctxt == NULL)
+        return;
+    ctxt->loaded = 0;
+    ctxt->doc = doc;
+    ctxt->input = input;
+    ctxt->output = output;
+    ctxt->filename = (char *) xmlStrdup((xmlChar *) filename);
+    ctxt->node = (xmlNodePtr) ctxt->doc;
+
+#ifdef LIBXML_XPATH_ENABLED
+    ctxt->pctxt = xmlXPathNewContext(ctxt->doc);
+    if (ctxt->pctxt == NULL) {
+        xmlFree(ctxt);
+        return;
+    }
+#endif /* LIBXML_XPATH_ENABLED */
+    while (1) {
+        if (ctxt->node == (xmlNodePtr) ctxt->doc)
+            snprintf(prompt, sizeof(prompt), "%s > ", "/");
+        else if ((ctxt->node != NULL) && (ctxt->node->name) &&
+                 (ctxt->node->ns) && (ctxt->node->ns->prefix))
+            snprintf(prompt, sizeof(prompt), "%s:%s > ",
+                     (ctxt->node->ns->prefix), ctxt->node->name);
+        else if ((ctxt->node != NULL) && (ctxt->node->name))
+            snprintf(prompt, sizeof(prompt), "%s > ", ctxt->node->name);
+        else
+            snprintf(prompt, sizeof(prompt), "? > ");
+        prompt[sizeof(prompt) - 1] = 0;
+
+        /*
+         * Get a new command line
+         */
+        cmdline = ctxt->input(prompt);
+        if (cmdline == NULL)
+            break;
+
+        /*
+         * Parse the command itself
+         */
+        cur = cmdline;
+        while ((*cur == ' ') || (*cur == '\t'))
+            cur++;
+        i = 0;
+        while ((*cur != ' ') && (*cur != '\t') &&
+               (*cur != '\n') && (*cur != '\r')) {
+            if (*cur == 0)
+                break;
+            command[i++] = *cur++;
+        }
+        command[i] = 0;
+        if (i == 0)
+            continue;
+
+        /*
+         * Parse the argument
+         */
+        while ((*cur == ' ') || (*cur == '\t'))
+            cur++;
+        i = 0;
+        while ((*cur != '\n') && (*cur != '\r') && (*cur != 0)) {
+            if (*cur == 0)
+                break;
+            arg[i++] = *cur++;
+        }
+        arg[i] = 0;
+
+        /*
+         * start interpreting the command
+         */
+        if (!strcmp(command, "exit"))
+            break;
+        if (!strcmp(command, "quit"))
+            break;
+        if (!strcmp(command, "bye"))
+            break;
+		if (!strcmp(command, "help")) {
+		  fprintf(ctxt->output, "\tbase         display XML base of the node\n");
+		  fprintf(ctxt->output, "\tsetbase URI  change the XML base of the node\n");
+		  fprintf(ctxt->output, "\tbye          leave shell\n");
+		  fprintf(ctxt->output, "\tcat [node]   display node or current node\n");
+		  fprintf(ctxt->output, "\tcd [path]    change directory to path or to root\n");
+		  fprintf(ctxt->output, "\tdir [path]   dumps informations about the node (namespace, attributes, content)\n");
+		  fprintf(ctxt->output, "\tdu [path]    show the structure of the subtree under path or the current node\n");
+		  fprintf(ctxt->output, "\texit         leave shell\n");
+		  fprintf(ctxt->output, "\thelp         display this help\n");
+		  fprintf(ctxt->output, "\tfree         display memory usage\n");
+		  fprintf(ctxt->output, "\tload [name]  load a new document with name\n");
+		  fprintf(ctxt->output, "\tls [path]    list contents of path or the current directory\n");
+		  fprintf(ctxt->output, "\tset xml_fragment replace the current node content with the fragment parsed in context\n");
+#ifdef LIBXML_XPATH_ENABLED
+		  fprintf(ctxt->output, "\txpath expr   evaluate the XPath expression in that context and print the result\n");
+		  fprintf(ctxt->output, "\tsetns nsreg  register a namespace to a prefix in the XPath evaluation context\n");
+		  fprintf(ctxt->output, "\t             format for nsreg is: prefix=[nsuri] (i.e. prefix= unsets a prefix)\n");
+		  fprintf(ctxt->output, "\tsetrootns    register all namespace found on the root element\n");
+		  fprintf(ctxt->output, "\t             the default namespace if any uses 'defaultns' prefix\n");
+#endif /* LIBXML_XPATH_ENABLED */
+		  fprintf(ctxt->output, "\tpwd          display current working directory\n");
+		  fprintf(ctxt->output, "\twhereis      display absolute path of [path] or current working directory\n");
+		  fprintf(ctxt->output, "\tquit         leave shell\n");
+#ifdef LIBXML_OUTPUT_ENABLED
+		  fprintf(ctxt->output, "\tsave [name]  save this document to name or the original name\n");
+		  fprintf(ctxt->output, "\twrite [name] write the current node to the filename\n");
+#endif /* LIBXML_OUTPUT_ENABLED */
+#ifdef LIBXML_VALID_ENABLED
+		  fprintf(ctxt->output, "\tvalidate     check the document for errors\n");
+#endif /* LIBXML_VALID_ENABLED */
+#ifdef LIBXML_SCHEMAS_ENABLED
+		  fprintf(ctxt->output, "\trelaxng rng  validate the document agaisnt the Relax-NG schemas\n");
+#endif
+		  fprintf(ctxt->output, "\tgrep string  search for a string in the subtree\n");
+#ifdef LIBXML_VALID_ENABLED
+        } else if (!strcmp(command, "validate")) {
+            xmlShellValidate(ctxt, arg, NULL, NULL);
+#endif /* LIBXML_VALID_ENABLED */
+        } else if (!strcmp(command, "load")) {
+            xmlShellLoad(ctxt, arg, NULL, NULL);
+#ifdef LIBXML_SCHEMAS_ENABLED
+        } else if (!strcmp(command, "relaxng")) {
+            xmlShellRNGValidate(ctxt, arg, NULL, NULL);
+#endif
+#ifdef LIBXML_OUTPUT_ENABLED
+        } else if (!strcmp(command, "save")) {
+            xmlShellSave(ctxt, arg, NULL, NULL);
+        } else if (!strcmp(command, "write")) {
+	    if (arg[0] == 0)
+		xmlGenericError(xmlGenericErrorContext,
+                        "Write command requires a filename argument\n");
+	    else
+		xmlShellWrite(ctxt, arg, ctxt->node, NULL);
+#endif /* LIBXML_OUTPUT_ENABLED */
+        } else if (!strcmp(command, "grep")) {
+            xmlShellGrep(ctxt, arg, ctxt->node, NULL);
+        } else if (!strcmp(command, "free")) {
+            if (arg[0] == 0) {
+                xmlMemShow(ctxt->output, 0);
+            } else {
+                int len = 0;
+
+                sscanf(arg, "%d", &len);
+                xmlMemShow(ctxt->output, len);
+            }
+        } else if (!strcmp(command, "pwd")) {
+            char dir[500];
+
+            if (!xmlShellPwd(ctxt, dir, ctxt->node, NULL))
+                fprintf(ctxt->output, "%s\n", dir);
+        } else if (!strcmp(command, "du")) {
+            if (arg[0] == 0) {
+                xmlShellDu(ctxt, NULL, ctxt->node, NULL);
+            } else {
+                ctxt->pctxt->node = ctxt->node;
+#ifdef LIBXML_XPATH_ENABLED
+                ctxt->pctxt->node = ctxt->node;
+                list = xmlXPathEval((xmlChar *) arg, ctxt->pctxt);
+#else
+                list = NULL;
+#endif /* LIBXML_XPATH_ENABLED */
+                if (list != NULL) {
+                    switch (list->type) {
+                        case XPATH_UNDEFINED:
+                            xmlGenericError(xmlGenericErrorContext,
+                                            "%s: no such node\n", arg);
+                            break;
+                        case XPATH_NODESET:{
+                            int indx;
+
+                            if (list->nodesetval == NULL)
+                                break;
+
+                            for (indx = 0;
+                                 indx < list->nodesetval->nodeNr;
+                                 indx++)
+                                xmlShellDu(ctxt, NULL,
+                                           list->nodesetval->
+                                           nodeTab[indx], NULL);
+                            break;
+                        }
+                        case XPATH_BOOLEAN:
+                            xmlGenericError(xmlGenericErrorContext,
+                                            "%s is a Boolean\n", arg);
+                            break;
+                        case XPATH_NUMBER:
+                            xmlGenericError(xmlGenericErrorContext,
+                                            "%s is a number\n", arg);
+                            break;
+                        case XPATH_STRING:
+                            xmlGenericError(xmlGenericErrorContext,
+                                            "%s is a string\n", arg);


<TRUNCATED>

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