Added some more libxml2 examples to Fun. (0.35.1)
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8 changed files with 218 additions and 1 deletions
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cmake_minimum_required(VERSION 3.10)
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cmake_minimum_required(VERSION 3.10)
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project(fun VERSION 0.35.0 LANGUAGES C)
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project(fun VERSION 0.35.1 LANGUAGES C)
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set(CMAKE_C_STANDARD 99)
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set(CMAKE_C_STANDARD 99)
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set(CMAKE_C_STANDARD_REQUIRED ON)
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set(CMAKE_C_STANDARD_REQUIRED ON)
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32
examples/data/catalog.xml
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32
examples/data/catalog.xml
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<?xml version="1.0" encoding="UTF-8"?>
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<catalog>
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<product id="SKU-1001">
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<name>Wireless Keyboard</name>
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<category>Peripherals</category>
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<price currency="USD">39.99</price>
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<specs>
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<layout>US</layout>
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<connection>Bluetooth</connection>
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<battery>AA</battery>
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</specs>
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</product>
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<product id="SKU-2002">
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<name>27" Monitor</name>
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<category>Displays</category>
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<price currency="USD">199.00</price>
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<specs>
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<resolution>2560x1440</resolution>
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<panel>IPS</panel>
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<refresh>75Hz</refresh>
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</specs>
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</product>
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<product id="SKU-3003">
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<name>USB-C Dock</name>
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<category>Peripherals</category>
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<price currency="USD">89.50</price>
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<specs>
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<ports>2xHDMI, 3xUSB-A, 1xUSB-C PD</ports>
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<pd>65W</pd>
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</specs>
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</product>
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</catalog>
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22
examples/data/employees.xml
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22
examples/data/employees.xml
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<?xml version="1.0" encoding="UTF-8"?>
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<company>
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<department name="Engineering">
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<employee id="E-100">
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<name>Alice Doe</name>
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<role>Senior Developer</role>
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<email>alice@example.com</email>
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</employee>
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<employee id="E-101">
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<name>Bob Roe</name>
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<role>DevOps Engineer</role>
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<email>bob@example.com</email>
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</employee>
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</department>
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<department name="Sales">
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<employee id="S-200">
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<name>Carol Smith</name>
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<role>Account Executive</role>
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<email>carol@example.com</email>
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</employee>
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</department>
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</company>
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11
examples/data/ns_example.xml
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examples/data/ns_example.xml
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<?xml version="1.0" encoding="UTF-8"?>
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<ns:library xmlns:ns="http://example.org/ns/library" xmlns:bk="http://example.org/ns/book">
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<bk:book id="B-1">
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<bk:title>The Art of Fun</bk:title>
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<bk:author>J. Findeisen</bk:author>
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</bk:book>
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<bk:book id="B-2">
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<bk:title>Minimal VM Design</bk:title>
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<bk:author>A. Dev</bk:author>
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</bk:book>
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</ns:library>
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52
examples/xml_access_catalog.fun
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52
examples/xml_access_catalog.fun
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/*
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* This file is part of the Fun programming language.
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* https://fun-lang.xyz/
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*
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* Copyright 2025 Johannes Findeisen <you@hanez.org>
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* Licensed under the terms of the Apache-2.0 license.
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* https://opensource.org/license/apache-2-0
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*
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* Added: 2025-12-09
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*/
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/*
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* Demonstrate reading specific fields from an XML file using
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* the minimal XML API (root name) and simple string parsing.
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*/
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include <io/xml.fun>
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path = "./examples/data/catalog.xml"
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xml = XML()
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doc = xml.from_file(path)
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if (doc == 0)
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print("Failed to load: ")
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print(path)
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else
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root = xml.root(doc)
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print("Root element: ")
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print(xml.name(root))
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// Show how to access specific fields by quick-and-dirty parsing
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content = read_file(path) // raw XML text
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// First product name
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name = xml.between(content, "<name>", "</name>")
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// First price value and its currency attribute (extract value, then attribute)
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price_val = xml.between(content, "<price", "</price>")
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currency = ""
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if (len(price_val) > 0)
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currency = xml.between(price_val, "currency=\"", "\"")
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// strip attribute tag part
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price_text = xml.between(price_val, ">", "") // until end
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if (len(price_text) == 0)
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price_text = price_val
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else
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price_text = ""
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print("First product name: ")
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print(name)
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print("First price: ")
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if (len(currency) > 0)
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print(currency)
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print(" ")
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print(price_text)
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44
examples/xml_access_employees.fun
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44
examples/xml_access_employees.fun
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/*
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* This file is part of the Fun programming language.
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* https://fun-lang.xyz/
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*
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* Copyright 2025 Johannes Findeisen <you@hanez.org>
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* Licensed under the terms of the Apache-2.0 license.
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* https://opensource.org/license/apache-2-0
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*
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* Added: 2025-12-09
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*/
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/*
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* Access selected fields in employees.xml using minimal XML API.
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*/
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include <io/xml.fun>
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path = "./examples/data/employees.xml"
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xml = XML()
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doc = xml.from_file(path)
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if (doc == 0)
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print("Failed to load: ")
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print(path)
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else
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root = xml.root(doc)
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print("Root element: ")
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print(xml.name(root))
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content = read_file(path)
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// Find the first <employee> block and extract its fields
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first_emp = xml.between(content, "<employee", "</employee>")
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name = xml.between(first_emp, "<name>", "</name>")
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role = xml.between(first_emp, "<role>", "</role>")
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email = xml.between(first_emp, "<email>", "</email>")
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emp_id = xml.between(first_emp, "id=\"", "\"")
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print("First employee id: ")
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print(emp_id)
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print("Name: ")
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print(name)
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print("Role: ")
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print(role)
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print("Email: ")
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print(email)
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38
examples/xml_access_ns.fun
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38
examples/xml_access_ns.fun
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/*
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* This file is part of the Fun programming language.
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* https://fun-lang.xyz/
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*
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* Copyright 2025 Johannes Findeisen <you@hanez.org>
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* Licensed under the terms of the Apache-2.0 license.
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* https://opensource.org/license/apache-2-0
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*
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* Added: 2025-12-09
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*/
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/*
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* Access a namespaced XML file and show prefixed element names.
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*/
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include <io/xml.fun>
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path = "./examples/data/ns_example.xml"
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xml = XML()
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doc = xml.from_file(path)
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if (doc == 0)
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print("Failed to load: ")
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print(path)
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else
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root = xml.root(doc)
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// With namespaces, the node name may include the prefix, e.g., "ns:library"
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print("Root element: ")
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print(xml.name(root))
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content = read_file(path)
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// Extract first book title and author (namespace prefix bk:)
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b1 = xml.between(content, "<bk:book", "</bk:book>")
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title = xml.between(b1, "<bk:title>", "</bk:title>")
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author = xml.between(b1, "<bk:author>", "</bk:author>")
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print("First book title: ")
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print(title)
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print("Author: ")
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print(author)
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// Get node concatenated text content as string.
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// Get node concatenated text content as string.
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fun text(this, node)
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fun text(this, node)
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return xml_text(node)
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return xml_text(node)
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// Utility: return substring of s between delimiters a and b.
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// - If a is not found, returns "".
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// - If b is an empty string, returns everything after the first occurrence of a.
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// - If b is not found after a, returns "".
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fun between(this, s, a, b)
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i = find(s, a)
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if (i < 0)
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return ""
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i = i + len(a)
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rest = substr(s, i, len(s) - i)
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if (len(b) == 0)
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return rest
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j = find(rest, b)
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if (j < 0)
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return ""
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return substr(rest, 0, j)
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