* Full support of XPATH 1.0 according to https://www.w3.org/TR/xpath-10 using yacc/lex

* The previous XPATH imlementation was very restricted. * The only function implemented is the Yang extension "current()". No other functions are implemented (eg last(), count()).
2018-07-16 16:13:31 +02:00 · 2018-07-16 16:13:31 +02:00 · bf728b37b8
commit bf728b37b8
parent 60ce7b12bd
26 changed files with 2856 additions and 481 deletions
--- a/lib/clixon/clixon_xpath.h
+++ b/lib/clixon/clixon_xpath.h
@ -0,0 +1,95 @@
+/*
+ *
+  ***** BEGIN LICENSE BLOCK *****
+ 
+  Copyright (C) 2009-2018 Olof Hagsand and Benny Holmgren
+
+  This file is part of CLIXON.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+  Alternatively, the contents of this file may be used under the terms of
+  the GNU General Public License Version 3 or later (the "GPL"),
+  in which case the provisions of the GPL are applicable instead
+  of those above. If you wish to allow use of your version of this file only
+  under the terms of the GPL, and not to allow others to
+  use your version of this file under the terms of Apache License version 2, 
+  indicate your decision by deleting the provisions above and replace them with
+  the  notice and other provisions required by the GPL. If you do not delete
+  the provisions above, a recipient may use your version of this file under
+  the terms of any one of the Apache License version 2 or the GPL.
+
+  ***** END LICENSE BLOCK *****
+
+ * Clixon XML XPATH 1.0 according to https://www.w3.org/TR/xpath-10
+ */
+#ifndef _CLIXON_XPATH_H
+#define _CLIXON_XPATH_H
+
+/*
+ * Types
+ */
+enum xp_op{
+    XO_AND,
+    XO_OR,
+    XO_DIV,
+    XO_MOD,
+    XO_ADD,
+    XO_MULT,
+    XO_SUB,
+    XO_EQ,
+    XO_NE,
+    XO_GE,
+    XO_LE,
+    XO_LT,
+    XO_GT,
+    XO_UNION,
+};
+
+/* Axis specifiers according to https://www.w3.org/TR/xpath-10/#NT-AxisName */
+enum axis_type{
+    A_NAN = 0, /* Not set */
+    A_ANCESTOR,
+    A_ANCESTOR_OR_SELF,
+    A_ATTRIBUTE,
+    A_CHILD,
+    A_DESCENDANT, 
+    A_DESCENDANT_OR_SELF,
+    A_FOLLOWING,
+    A_FOLLOWING_SIBLING, 
+    A_NAMESPACE,
+    A_PARENT,
+    A_PRECEEDING,
+    A_PRECEEDING_SIBLING,
+    A_SELF,
+    A_ROOT /* XXX Not in https://www.w3.org/TR/xpath-10 */
+};
+
+/*
+ * Variables
+ */
+extern const map_str2int xpopmap[];
+
+/*
+ * Prototypes
+ */
+#if defined(__GNUC__) && __GNUC__ >= 3
+int xpath_vec_nodeset(cxobj *xcur, char *format, cxobj  ***vec, size_t *veclen, ...) __attribute__ ((format (printf, 2, 5)));
+int xpath_vec_bool(cxobj *xcur, char *format, ...) __attribute__ ((format (printf, 2, 3)));
+#else
+int xpath_vec_nodeset(cxobj *xcur, char *format, cxobj  ***vec, size_t *veclen, ...);
+int xpath_vec_bool(cxobj *xcur, char *format, ...);
+#endif
+int xpath_vec_ctx(cxobj *xcur, char *xpath, xp_ctx  **xrp);
+
+#endif /* _CLIXON_XPATH_H */