Revert directory structure changes
diff --git a/xpath.h b/xpath.h
new file mode 100644
index 0000000..f8fd861
--- /dev/null
+++ b/xpath.h
@@ -0,0 +1,278 @@
+/*
+ * xpath.c: interface for XML Path Language implementation
+ *
+ * Reference: W3C Working Draft 5 July 1999
+ * http://www.w3.org/Style/XSL/Group/1999/07/xpath-19990705.html
+ *
+ * See COPYRIGHT for the status of this software
+ *
+ * Author: Daniel.Veillard@w3.org
+ */
+
+#ifndef __XML_XPATH_H__
+#define __XML_XPATH_H__
+
+#include <libxml/tree.h>
+#include <libxml/hash.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct _xmlXPathContext xmlXPathContext;
+typedef xmlXPathContext *xmlXPathContextPtr;
+typedef struct _xmlXPathParserContext xmlXPathParserContext;
+typedef xmlXPathParserContext *xmlXPathParserContextPtr;
+
+/**
+ * The set of XPath error codes
+ */
+
+typedef enum {
+ XPATH_EXPRESSION_OK = 0,
+ XPATH_NUMBER_ERROR,
+ XPATH_UNFINISHED_LITERAL_ERROR,
+ XPATH_START_LITERAL_ERROR,
+ XPATH_VARIABLE_REF_ERROR,
+ XPATH_UNDEF_VARIABLE_ERROR,
+ XPATH_INVALID_PREDICATE_ERROR,
+ XPATH_EXPR_ERROR,
+ XPATH_UNCLOSED_ERROR,
+ XPATH_UNKNOWN_FUNC_ERROR,
+ XPATH_INVALID_OPERAND,
+ XPATH_INVALID_TYPE,
+ XPATH_INVALID_ARITY,
+ XPATH_INVALID_CTXT_SIZE,
+ XPATH_INVALID_CTXT_POSITION,
+ XPATH_MEMORY_ERROR,
+ XPTR_SYNTAX_ERROR,
+ XPTR_RESOURCE_ERROR,
+ XPTR_SUB_RESOURCE_ERROR,
+ XPATH_UNDEF_PREFIX_ERROR
+} xmlXPathError;
+
+/*
+ * A node-set (an unordered collection of nodes without duplicates)
+ */
+typedef struct _xmlNodeSet xmlNodeSet;
+typedef xmlNodeSet *xmlNodeSetPtr;
+struct _xmlNodeSet {
+ int nodeNr; /* number of nodes in the set */
+ int nodeMax; /* size of the array as allocated */
+ xmlNodePtr *nodeTab; /* array of nodes in no particular order */
+};
+
+/*
+ * An expression is evaluated to yield an object, which
+ * has one of the following four basic types:
+ * - node-set
+ * - boolean
+ * - number
+ * - string
+ *
+ * @@ XPointer will add more types !
+ */
+
+typedef enum {
+ XPATH_UNDEFINED = 0,
+ XPATH_NODESET = 1,
+ XPATH_BOOLEAN = 2,
+ XPATH_NUMBER = 3,
+ XPATH_STRING = 4,
+ XPATH_POINT = 5,
+ XPATH_RANGE = 6,
+ XPATH_LOCATIONSET = 7,
+ XPATH_USERS = 8,
+ XPATH_XSLT_TREE = 9 /* An XSLT value tree, non modifiable */
+} xmlXPathObjectType;
+
+typedef struct _xmlXPathObject xmlXPathObject;
+typedef xmlXPathObject *xmlXPathObjectPtr;
+struct _xmlXPathObject {
+ xmlXPathObjectType type;
+ xmlNodeSetPtr nodesetval;
+ int boolval;
+ double floatval;
+ xmlChar *stringval;
+ void *user;
+ int index;
+ void *user2;
+ int index2;
+};
+
+/*
+ * A conversion function is associated to a type and used to cast
+ * the new type to primitive values.
+ */
+typedef int (*xmlXPathConvertFunc) (xmlXPathObjectPtr obj, int type);
+
+/*
+ * Extra type: a name and a conversion function.
+ */
+
+typedef struct _xmlXPathType xmlXPathType;
+typedef xmlXPathType *xmlXPathTypePtr;
+struct _xmlXPathType {
+ const xmlChar *name; /* the type name */
+ xmlXPathConvertFunc func; /* the conversion function */
+};
+
+/*
+ * Extra variable: a name and a value.
+ */
+
+typedef struct _xmlXPathVariable xmlXPathVariable;
+typedef xmlXPathVariable *xmlXPathVariablePtr;
+struct _xmlXPathVariable {
+ const xmlChar *name; /* the variable name */
+ xmlXPathObjectPtr value; /* the value */
+};
+
+/*
+ * an evaluation function, the parameters are on the context stack
+ */
+
+typedef void (*xmlXPathEvalFunc)(xmlXPathParserContextPtr ctxt, int nargs);
+
+/*
+ * Extra function: a name and a evaluation function.
+ */
+
+typedef struct _xmlXPathFunct xmlXPathFunct;
+typedef xmlXPathFunct *xmlXPathFuncPtr;
+struct _xmlXPathFunct {
+ const xmlChar *name; /* the function name */
+ xmlXPathEvalFunc func; /* the evaluation function */
+};
+
+/*
+ * An axis traversal function. To traverse an axis, the engine calls
+ * the first time with cur == NULL and repeat until the function returns
+ * NULL indicating the end of the axis traversal.
+ */
+
+typedef xmlXPathObjectPtr (*xmlXPathAxisFunc) (xmlXPathParserContextPtr ctxt,
+ xmlXPathObjectPtr cur);
+
+/*
+ * Extra axis: a name and an axis function.
+ */
+
+typedef struct _xmlXPathAxis xmlXPathAxis;
+typedef xmlXPathAxis *xmlXPathAxisPtr;
+struct _xmlXPathAxis {
+ const xmlChar *name; /* the axis name */
+ xmlXPathAxisFunc func; /* the search function */
+};
+
+/*
+ * Expression evaluation occurs with respect to a context.
+ * he context consists of:
+ * - a node (the context node)
+ * - a node list (the context node list)
+ * - a set of variable bindings
+ * - a function library
+ * - the set of namespace declarations in scope for the expression
+ * Following the switch to hash tables, this need to be trimmed up at
+ * the next binary incompatible release.
+ */
+
+struct _xmlXPathContext {
+ xmlDocPtr doc; /* The current document */
+ xmlNodePtr node; /* The current node */
+
+ int nb_variables_unused; /* unused (hash table) */
+ int max_variables_unused; /* unused (hash table) */
+ xmlHashTablePtr varHash; /* Hash table of defined variables */
+
+ int nb_types; /* number of defined types */
+ int max_types; /* max number of types */
+ xmlXPathTypePtr types; /* Array of defined types */
+
+ int nb_funcs_unused; /* unused (hash table) */
+ int max_funcs_unused; /* unused (hash table) */
+ xmlHashTablePtr funcHash; /* Hash table of defined funcs */
+
+ int nb_axis; /* number of defined axis */
+ int max_axis; /* max number of axis */
+ xmlXPathAxisPtr axis; /* Array of defined axis */
+
+ /* the namespace nodes of the context node */
+ xmlNsPtr *namespaces; /* Array of namespaces */
+ int nsNr; /* number of namespace in scope */
+ void *user; /* function to free */
+
+ /* extra variables */
+ int contextSize; /* the context size */
+ int proximityPosition; /* the proximity position */
+
+ /* extra stuff for XPointer */
+ int xptr; /* it this an XPointer context */
+ xmlNodePtr here; /* for here() */
+ xmlNodePtr origin; /* for origin() */
+
+ /* the set of namespace declarations in scope for the expression */
+ xmlHashTablePtr nsHash; /* The namespaces hash table */
+ void *varLookupFunc; /* variable lookup func */
+ void *varLookupData; /* variable lookup data */
+
+ /* Possibility to link in an extra item */
+ void *extra; /* needed for XSLT */
+};
+
+/*
+ * An XPath parser context, it contains pure parsing informations,
+ * an xmlXPathContext, and the stack of objects.
+ */
+struct _xmlXPathParserContext {
+ const xmlChar *cur; /* the current char being parsed */
+ const xmlChar *base; /* the full expression */
+
+ int error; /* error code */
+
+ xmlXPathContextPtr context; /* the evaluation context */
+ xmlXPathObjectPtr value; /* the current value */
+ int valueNr; /* number of values stacked */
+ int valueMax; /* max number of values stacked */
+ xmlXPathObjectPtr *valueTab; /* stack of values */
+};
+
+/*
+ * An XPath function
+ * The arguments (if any) are popped out of the context stack
+ * and the result is pushed on the stack.
+ */
+
+typedef void (*xmlXPathFunction) (xmlXPathParserContextPtr ctxt, int nargs);
+
+/************************************************************************
+ * *
+ * Public API *
+ * *
+ ************************************************************************/
+
+/**
+ * Evaluation functions.
+ */
+void xmlXPathInit (void);
+xmlXPathContextPtr xmlXPathNewContext (xmlDocPtr doc);
+void xmlXPathFreeContext (xmlXPathContextPtr ctxt);
+xmlXPathObjectPtr xmlXPathEval (const xmlChar *str,
+ xmlXPathContextPtr ctxt);
+xmlXPathObjectPtr xmlXPathEvalXPtrExpr (const xmlChar *str,
+ xmlXPathContextPtr ctxt);
+void xmlXPathFreeObject (xmlXPathObjectPtr obj);
+xmlXPathObjectPtr xmlXPathEvalExpression (const xmlChar *str,
+ xmlXPathContextPtr ctxt);
+xmlNodeSetPtr xmlXPathNodeSetCreate (xmlNodePtr val);
+void xmlXPathFreeNodeSetList (xmlXPathObjectPtr obj);
+void xmlXPathFreeNodeSet (xmlNodeSetPtr obj);
+xmlXPathObjectPtr xmlXPathObjectCopy (xmlXPathObjectPtr val);
+int xmlXPathCmpNodes (xmlNodePtr node1,
+ xmlNodePtr node2);
+
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* ! __XML_XPATH_H__ */