# HG changeset patch
# User Mike Becker <universe@uap-core.de>
# Date 1433324858 -7200
# Node ID 80d273229f245b7d1c21ec42d235d179327a2813
# Parent  7532963bd15b3466a085943d0ab33d1cf23552ee
fixed grammar for path + added missing string quote escaping (still not perfect: escape sequence is in syntax tree)

diff -r 7532963bd15b -r 80d273229f24 libidav/davqlparser.c
--- a/libidav/davqlparser.c	Tue Jun 02 21:03:58 2015 +0200
+++ b/libidav/davqlparser.c	Wed Jun 03 11:47:38 2015 +0200
@@ -515,11 +515,18 @@
         // quoted strings / identifiers are a single token
         if (src.ptr[i] == '\'' || src.ptr[i] == '`') {
             if (src.ptr[i] == insequence) {
-                // add quoted token to list
-                token->value.length++;
-                tokens = dav_parse_add_token(tokens, token);
-                token = NULL;
-                insequence = '\0';
+                // lookahead for escaped string quotes
+                if (src.ptr[i] == '\'' && i+2 < src.length &&
+                    src.ptr[i+1] == src.ptr[i] && src.ptr[i+2] == src.ptr[i]) {
+                    token->value.length += 3;
+                    i += 2;
+                } else {
+                    // add quoted token to list
+                    token->value.length++;
+                    tokens = dav_parse_add_token(tokens, token);
+                    token = NULL;
+                    insequence = '\0';
+                }
             } else if (insequence == '\0') {
                 insequence = src.ptr[i];
                 // always create new token for quoted strings
diff -r 7532963bd15b -r 80d273229f24 libidav/davqlparser.h
--- a/libidav/davqlparser.h	Tue Jun 02 21:03:58 2015 +0200
+++ b/libidav/davqlparser.h	Wed Jun 03 11:47:38 2015 +0200
@@ -157,6 +157,9 @@
  * The grammar for a DavQLStatement is:
  * 
  * <pre>
+ * Keyword = "select" | "set" | "from" | "at" | "as" | "where" | "with"
+ *         | "order" | "by" | "asc" | "desc";
+ * 
  * Expression        = AddExpression;
  * AddExpression     = MultExpression, [AddOperator, AddExpression];
  * MultExpression    = BitwiseExpression, [MultOperator, MultExpression];
@@ -200,9 +203,9 @@
  * SetExpressions   = SetExpression, {",", SetExpression};
  * SetExpression    = Identifier, "=", Expression;
  * 
- * Path = "%s"
- *      | "/", {?Character? - " "}
- *      | "'/", {?Character?}, "'";
+ * Path     = String
+ *          | "/", [PathNode, {"/", PathNode}], ["/"];
+ * PathNode = {{?Character? - "/"} - Keyword};
  * 
  * WithClause = "depth", "=", (Number | "infinity");
  * 
@@ -213,7 +216,7 @@
  * 
  * Note: mandatory spaces are part of the grammar. But you may also insert an
  * arbitrary amount of optional spaces between two symbols if they are not part
- * of an literal or identifier.
+ * of an literal, identifier or the path.
  * 
  * <b>SELECT:</b>
  * <pre>