C++ class for reading and writing XML structures. No need for a C++ code parser or special pre compiler. Specify a schema entirly in native C++. The schema is verified when XML is read and exceptions are thrown when the XML to be parse is invalid.
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
Marc Wäckerlin dee28317ca fix debian build 7 months ago
debian fix debian build 7 months ago
doc fixed C++11 dependency 9 months ago
examples fixed rpm build 2 years ago
src migrated README to README.md 9 months ago
test update buildsystem 3 years ago
AUTHORS new author url 3 years ago
COPYING LGPL 3 10 years ago
ChangeLog fix rpm build 7 months ago
INSTALL build system updated 7 months ago
NEWS fix for C++17, requires at least C+17 9 months ago
README.md build system updated 7 months ago
autogen.sh update buildsystem 3 years ago
ax_check_qt.m4 fixed dependency-bug in ubuntu cosmic and stretch 1 year ago
ax_cxx_compile_stdcxx.m4 fix for C++17, requires at least C+17 9 months ago
ax_cxx_compile_stdcxx_11.m4 update buildsystem 3 years ago
ax_init_standard_project.m4 build system updated 7 months ago
bootstrap.sh build system updated 7 months ago
build-in-docker.conf fixed for build with opensuse tumbleweed and leap 1 year ago
build-in-docker.sh build system updated 7 months ago
build-resource-file.sh new author url 3 years ago
configure.ac fixed C++11 dependency 9 months ago
dependency-graph.sh fixed build on mac 1 year ago
install-32-bit-lin-win.sh 32bit-build added, refs #5 9 years ago
install-64-and-32-bit-linux.sh extendions and corrections 10 years ago
libxml-cxx.desktop.in development packages are named devel in rpms, not dev 3 years ago
libxml-cxx.spec.in fix rpm build 7 months ago
mac-create-app-bundle.sh update buildsystem 10 months ago
makefile.am fix rpm build 7 months ago
makefile_test.inc.am update buildsystem 3 years ago
resolve-debbuilddeps.sh fixed build for mageia 1 year ago
resolve-rpmbuilddeps.sh update buildsystem 10 months ago
rpmsign.exp build updated 2 years ago
sql-to-dot.sed update buildsystem 3 years ago
template.sh fix build in bionic 1 year ago

README.md

C++ XML Class Library

This is a C++ class for reading and writing XML structures.

  • Specify your XML schema in C++ using common C++ syntax, such as shift, dereference, etc.
  • Verify the schema of XML files while they are read from a stream.
  • Map and store your own C++ classes to XML and restore them back.

Rationale

The initial idea was to map C++ data structures to XML files for configuration files that can easily be edited by hand.

This library does not need any kind of C++ code parser or special pre compiler. You can specify a schema entirly in native C++. The schema is verified when XML is read and exceptions are thrown when the XML to be parse is invalid. Exceptions specify exactly the location and reason of the problem, so that the editor of the XML file can easily find and correct the problem.

C++ classes can inherit xml::Serialize and become serializable this way. All you need to do is to overwrite one single method, where you declare XML tag names for the class name and for all members.

Note: All links below require the generated Doxygen documentation.

More rationale: See also Related Pages in the doxygen project documentation.

Basics

Include file:

#include <xml-cxx/xml.hxx>

Link option:

-lxml-cxx

Factory with Schema Declaration

Small example on how to declare an XML schema, you may then use template.read(is) to read XML from a stream:

// start with root element: <root id="">
xml::Factory template(xml::Node("root").attr("id", xml::optional)
                      // <root> contains any number of <child>
                      <<xml::String("child")
                      // must contain exactly one <other>
                      <<(xml::Node("other").limits(1, 1)
                         // <other> contains min 2 max 4 <text>
                         <<xml::String("text").limits(2, 4)));

Using Macros Instead of Literal Text

If you prefere using constants instead of literal texts, you can declare the node names before you use them:

XML_NODE(root);
XML_STRING(child);
[...]
xml::Factory template(xml::node::root.clone()->attr("id", xml::optional)
                      <<*xml::string::child.clone()
                      [...]

Serialize Classes, Join Classes with XML

When inheriting from xml::Serialize, your class inherits the methods xml::Serialize::loadXml and xml::Serialize::saveXml. Simply overwrite xml::Serialize::initXmlMembers to make your class serializable:

class MyClass: public xml::Serialize {
  [...]
  protected:
    void initXmlMembers() {
      className("MyClass");
      persist(i, "i");
      persist(s, "s");
      persist(l, "l");
    }
  private:
    int i;
    std::string s;
    xml::List<std::string> l; // same behaviour as std::list
};

Known Limitations

  • XML-Comments are only ignored, not read, not stored.
  • Mixed tags and text is not supported. Tags may either contain other tags only (type xml::Node) or text only (type xml::String). -> This is intended behaviour!
  • Unlimited recursion is not possible (e.g. <p><p><p></p></p></p>;)
  • Exceptions should be optional, best effort otherwise (option “strict”)

Limitations of Serialization

  • Only the following types are intended to be serialized:
    (It is possible to use other techniques, but that’s not recommended)
    • basic C++ types (except pointer)
    • std::string
    • classes derieved from xml::Serialize
    • most standard containers, but in their xml-form, e.g. xml::List instead of std::list (xml::List inherits std::list)
    • Optional values are supported through xml::Optional
    • std::bitset, std::priority_queue, std::queue and std::stack are not implemented
    • Polymorfic serialisation is not yet implemented

In the Web

Missing a Feature, Found a Bug

You are missing a feature, or an implementation is too incomplete for the purpose you need it? Or you even found a bug? Just register and open an issue on the project management page.