libs/EXTERNAL/libpugixml/docs/samples/load_memory.cpp

#include "pugixml.hpp"

#include <iostream>
#include <cstring>

int main()
{
// tag::decl[]
    const char source[] = "<mesh name='sphere'><bounds>0 0 1 1</bounds></mesh>";
    size_t size = sizeof(source);
// end::decl[]

    pugi::xml_document doc;

    {
    // tag::load_buffer[]
        // You can use load_buffer to load document from immutable memory block:
        pugi::xml_parse_result result = doc.load_buffer(source, size);
    // end::load_buffer[]

        std::cout << "Load result: " << result.description() << ", mesh name: " << doc.child("mesh").attribute("name").value() << std::endl;
    }

    {
    // tag::load_buffer_inplace_begin[]
        // You can use load_buffer_inplace to load document from mutable memory block; the block's lifetime must exceed that of document
        char* buffer = new char[size];
        memcpy(buffer, source, size);

        // The block can be allocated by any method; the block is modified during parsing
        pugi::xml_parse_result result = doc.load_buffer_inplace(buffer, size);
    // end::load_buffer_inplace_begin[]

        std::cout << "Load result: " << result.description() << ", mesh name: " << doc.child("mesh").attribute("name").value() << std::endl;

    // tag::load_buffer_inplace_end[]
        // You have to destroy the block yourself after the document is no longer used
        delete[] buffer;
    // end::load_buffer_inplace_end[]
    }

    {
    // tag::load_buffer_inplace_own[]
        // You can use load_buffer_inplace_own to load document from mutable memory block and to pass the ownership of this block
        // The block has to be allocated via pugixml allocation function - using i.e. operator new here is incorrect
        char* buffer = static_cast<char*>(pugi::get_memory_allocation_function()(size));
        memcpy(buffer, source, size);

        // The block will be deleted by the document
        pugi::xml_parse_result result = doc.load_buffer_inplace_own(buffer, size);
    // end::load_buffer_inplace_own[]

        std::cout << "Load result: " << result.description() << ", mesh name: " << doc.child("mesh").attribute("name").value() << std::endl;
    }

    {
    // tag::load_string[]
        // You can use load to load document from null-terminated strings, for example literals:
        pugi::xml_parse_result result = doc.load_string("<mesh name='sphere'><bounds>0 0 1 1</bounds></mesh>");
    // end::load_string[]

        std::cout << "Load result: " << result.description() << ", mesh name: " << doc.child("mesh").attribute("name").value() << std::endl;
    }
}

// vim:et