Added some more libxml2 examples to Fun. (0.35.1)

examples/xml_access_catalog.fun

@@ -0,0 +1,52 @@
+/*
+ * This file is part of the Fun programming language.
+ * https://fun-lang.xyz/
+ *
+ * Copyright 2025 Johannes Findeisen <you@hanez.org>
+ * Licensed under the terms of the Apache-2.0 license.
+ * https://opensource.org/license/apache-2-0
+ *
+ * Added: 2025-12-09
+ */
+
+/*
+ * Demonstrate reading specific fields from an XML file using
+ * the minimal XML API (root name) and simple string parsing.
+ */
+
+include <io/xml.fun>
+
+path = "./examples/data/catalog.xml"
+xml = XML()
+doc = xml.from_file(path)
+if (doc == 0)
+  print("Failed to load: ")
+  print(path)
+else
+  root = xml.root(doc)
+  print("Root element: ")
+  print(xml.name(root))
+
+  // Show how to access specific fields by quick-and-dirty parsing
+  content = read_file(path)  // raw XML text
+  // First product name
+  name = xml.between(content, "<name>", "</name>")
+  // First price value and its currency attribute (extract value, then attribute)
+  price_val = xml.between(content, "<price", "</price>")
+  currency = ""
+  if (len(price_val) > 0)
+    currency = xml.between(price_val, "currency=\"", "\"")
+    // strip attribute tag part
+    price_text = xml.between(price_val, ">", "")  // until end
+    if (len(price_text) == 0)
+      price_text = price_val
+  else
+    price_text = ""
+
+  print("First product name: ")
+  print(name)
+  print("First price: ")
+  if (len(currency) > 0)
+    print(currency)
+    print(" ")
+  print(price_text)