--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/env/lib/python3.7/site-packages/lxml/includes/libxml/xmlregexp.h	Sat May 02 07:14:21 2020 -0400
@@ -0,0 +1,222 @@
+/*
+ * Summary: regular expressions handling
+ * Description: basic API for libxml regular expressions handling used
+ *              for XML Schemas and validation.
+ *
+ * Copy: See Copyright for the status of this software.
+ *
+ * Author: Daniel Veillard
+ */
+
+#ifndef __XML_REGEXP_H__
+#define __XML_REGEXP_H__
+
+#include <libxml/xmlversion.h>
+
+#ifdef LIBXML_REGEXP_ENABLED
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * xmlRegexpPtr:
+ *
+ * A libxml regular expression, they can actually be far more complex
+ * thank the POSIX regex expressions.
+ */
+typedef struct _xmlRegexp xmlRegexp;
+typedef xmlRegexp *xmlRegexpPtr;
+
+/**
+ * xmlRegExecCtxtPtr:
+ *
+ * A libxml progressive regular expression evaluation context
+ */
+typedef struct _xmlRegExecCtxt xmlRegExecCtxt;
+typedef xmlRegExecCtxt *xmlRegExecCtxtPtr;
+
+#ifdef __cplusplus
+}
+#endif
+#include <libxml/tree.h>
+#include <libxml/dict.h>
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * The POSIX like API
+ */
+XMLPUBFUN xmlRegexpPtr XMLCALL
+		    xmlRegexpCompile	(const xmlChar *regexp);
+XMLPUBFUN void XMLCALL			 xmlRegFreeRegexp(xmlRegexpPtr regexp);
+XMLPUBFUN int XMLCALL
+		    xmlRegexpExec	(xmlRegexpPtr comp,
+					 const xmlChar *value);
+XMLPUBFUN void XMLCALL
+		    xmlRegexpPrint	(FILE *output,
+					 xmlRegexpPtr regexp);
+XMLPUBFUN int XMLCALL
+		    xmlRegexpIsDeterminist(xmlRegexpPtr comp);
+
+/**
+ * xmlRegExecCallbacks:
+ * @exec: the regular expression context
+ * @token: the current token string
+ * @transdata: transition data
+ * @inputdata: input data
+ *
+ * Callback function when doing a transition in the automata
+ */
+typedef void (*xmlRegExecCallbacks) (xmlRegExecCtxtPtr exec,
+	                             const xmlChar *token,
+				     void *transdata,
+				     void *inputdata);
+
+/*
+ * The progressive API
+ */
+XMLPUBFUN xmlRegExecCtxtPtr XMLCALL
+		    xmlRegNewExecCtxt	(xmlRegexpPtr comp,
+					 xmlRegExecCallbacks callback,
+					 void *data);
+XMLPUBFUN void XMLCALL
+		    xmlRegFreeExecCtxt	(xmlRegExecCtxtPtr exec);
+XMLPUBFUN int XMLCALL
+		    xmlRegExecPushString(xmlRegExecCtxtPtr exec,
+					 const xmlChar *value,
+					 void *data);
+XMLPUBFUN int XMLCALL
+		    xmlRegExecPushString2(xmlRegExecCtxtPtr exec,
+					 const xmlChar *value,
+					 const xmlChar *value2,
+					 void *data);
+
+XMLPUBFUN int XMLCALL
+		    xmlRegExecNextValues(xmlRegExecCtxtPtr exec,
+					 int *nbval,
+					 int *nbneg,
+					 xmlChar **values,
+					 int *terminal);
+XMLPUBFUN int XMLCALL
+		    xmlRegExecErrInfo	(xmlRegExecCtxtPtr exec,
+					 const xmlChar **string,
+					 int *nbval,
+					 int *nbneg,
+					 xmlChar **values,
+					 int *terminal);
+#ifdef LIBXML_EXPR_ENABLED
+/*
+ * Formal regular expression handling
+ * Its goal is to do some formal work on content models
+ */
+
+/* expressions are used within a context */
+typedef struct _xmlExpCtxt xmlExpCtxt;
+typedef xmlExpCtxt *xmlExpCtxtPtr;
+
+XMLPUBFUN void XMLCALL
+			xmlExpFreeCtxt	(xmlExpCtxtPtr ctxt);
+XMLPUBFUN xmlExpCtxtPtr XMLCALL
+			xmlExpNewCtxt	(int maxNodes,
+					 xmlDictPtr dict);
+
+XMLPUBFUN int XMLCALL
+			xmlExpCtxtNbNodes(xmlExpCtxtPtr ctxt);
+XMLPUBFUN int XMLCALL
+			xmlExpCtxtNbCons(xmlExpCtxtPtr ctxt);
+
+/* Expressions are trees but the tree is opaque */
+typedef struct _xmlExpNode xmlExpNode;
+typedef xmlExpNode *xmlExpNodePtr;
+
+typedef enum {
+    XML_EXP_EMPTY = 0,
+    XML_EXP_FORBID = 1,
+    XML_EXP_ATOM = 2,
+    XML_EXP_SEQ = 3,
+    XML_EXP_OR = 4,
+    XML_EXP_COUNT = 5
+} xmlExpNodeType;
+
+/*
+ * 2 core expressions shared by all for the empty language set
+ * and for the set with just the empty token
+ */
+XMLPUBVAR xmlExpNodePtr forbiddenExp;
+XMLPUBVAR xmlExpNodePtr emptyExp;
+
+/*
+ * Expressions are reference counted internally
+ */
+XMLPUBFUN void XMLCALL
+			xmlExpFree	(xmlExpCtxtPtr ctxt,
+					 xmlExpNodePtr expr);
+XMLPUBFUN void XMLCALL
+			xmlExpRef	(xmlExpNodePtr expr);
+
+/*
+ * constructors can be either manual or from a string
+ */
+XMLPUBFUN xmlExpNodePtr XMLCALL
+			xmlExpParse	(xmlExpCtxtPtr ctxt,
+					 const char *expr);
+XMLPUBFUN xmlExpNodePtr XMLCALL
+			xmlExpNewAtom	(xmlExpCtxtPtr ctxt,
+					 const xmlChar *name,
+					 int len);
+XMLPUBFUN xmlExpNodePtr XMLCALL
+			xmlExpNewOr	(xmlExpCtxtPtr ctxt,
+					 xmlExpNodePtr left,
+					 xmlExpNodePtr right);
+XMLPUBFUN xmlExpNodePtr XMLCALL
+			xmlExpNewSeq	(xmlExpCtxtPtr ctxt,
+					 xmlExpNodePtr left,
+					 xmlExpNodePtr right);
+XMLPUBFUN xmlExpNodePtr XMLCALL
+			xmlExpNewRange	(xmlExpCtxtPtr ctxt,
+					 xmlExpNodePtr subset,
+					 int min,
+					 int max);
+/*
+ * The really interesting APIs
+ */
+XMLPUBFUN int XMLCALL
+			xmlExpIsNillable(xmlExpNodePtr expr);
+XMLPUBFUN int XMLCALL
+			xmlExpMaxToken	(xmlExpNodePtr expr);
+XMLPUBFUN int XMLCALL
+			xmlExpGetLanguage(xmlExpCtxtPtr ctxt,
+					 xmlExpNodePtr expr,
+					 const xmlChar**langList,
+					 int len);
+XMLPUBFUN int XMLCALL
+			xmlExpGetStart	(xmlExpCtxtPtr ctxt,
+					 xmlExpNodePtr expr,
+					 const xmlChar**tokList,
+					 int len);
+XMLPUBFUN xmlExpNodePtr XMLCALL
+			xmlExpStringDerive(xmlExpCtxtPtr ctxt,
+					 xmlExpNodePtr expr,
+					 const xmlChar *str,
+					 int len);
+XMLPUBFUN xmlExpNodePtr XMLCALL
+			xmlExpExpDerive	(xmlExpCtxtPtr ctxt,
+					 xmlExpNodePtr expr,
+					 xmlExpNodePtr sub);
+XMLPUBFUN int XMLCALL
+			xmlExpSubsume	(xmlExpCtxtPtr ctxt,
+					 xmlExpNodePtr expr,
+					 xmlExpNodePtr sub);
+XMLPUBFUN void XMLCALL
+			xmlExpDump	(xmlBufferPtr buf,
+					 xmlExpNodePtr expr);
+#endif /* LIBXML_EXPR_ENABLED */
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LIBXML_REGEXP_ENABLED */
+
+#endif /*__XML_REGEXP_H__ */