Mercurial > minori

annotate dep/pugixml/docs/samples/load_memory.cpp @ 187:9613d72b097e

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
*: multiple performance improvements like marking `static const` when it makes sense... date: change old stupid heap-based method to a structure which should make copying the thing actually make a copy. also many performance-based changes, like removing the std::tie dependency and forward-declaring nlohmann json *: replace every instance of QString::fromUtf8 to Strings::ToQString. the main difference is that our function will always convert exactly what is in the string, while some other times it would only convert up to the nearest NUL byte
author Paper <mrpapersonic@gmail.com>
date Wed, 06 Dec 2023 13:43:54 -0500
parents d10b6c6b432e
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
55
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
1 #include "pugixml.hpp"
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
2
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
3 #include <iostream>
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
4 #include <cstring>
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
5
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
6 int main()
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
7 {
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
8 // tag::decl[]
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
9 const char source[] = "<mesh name='sphere'><bounds>0 0 1 1</bounds></mesh>";
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
10 size_t size = sizeof(source);
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
11 // end::decl[]
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
12
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
13 pugi::xml_document doc;
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
14
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
15 {
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
16 // tag::load_buffer[]
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
17 // You can use load_buffer to load document from immutable memory block:
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
18 pugi::xml_parse_result result = doc.load_buffer(source, size);
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
19 // end::load_buffer[]
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
20
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
21 std::cout << "Load result: " << result.description() << ", mesh name: " << doc.child("mesh").attribute("name").value() << std::endl;
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
22 }
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
23
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
24 {
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
25 // tag::load_buffer_inplace_begin[]
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
26 // You can use load_buffer_inplace to load document from mutable memory block; the block's lifetime must exceed that of document
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
27 char* buffer = new char[size];
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
28 memcpy(buffer, source, size);
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
29
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
30 // The block can be allocated by any method; the block is modified during parsing
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
31 pugi::xml_parse_result result = doc.load_buffer_inplace(buffer, size);
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
32 // end::load_buffer_inplace_begin[]
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
33
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
34 std::cout << "Load result: " << result.description() << ", mesh name: " << doc.child("mesh").attribute("name").value() << std::endl;
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
35
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
36 // tag::load_buffer_inplace_end[]
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
37 // You have to destroy the block yourself after the document is no longer used
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
38 delete[] buffer;
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
39 // end::load_buffer_inplace_end[]
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
40 }
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
41
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
42 {
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
43 // tag::load_buffer_inplace_own[]
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
44 // You can use load_buffer_inplace_own to load document from mutable memory block and to pass the ownership of this block
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
45 // The block has to be allocated via pugixml allocation function - using i.e. operator new here is incorrect
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
46 char* buffer = static_cast<char*>(pugi::get_memory_allocation_function()(size));
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
47 memcpy(buffer, source, size);
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
48
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
49 // The block will be deleted by the document
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
50 pugi::xml_parse_result result = doc.load_buffer_inplace_own(buffer, size);
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
51 // end::load_buffer_inplace_own[]
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
52
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
53 std::cout << "Load result: " << result.description() << ", mesh name: " << doc.child("mesh").attribute("name").value() << std::endl;
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
54 }
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
55
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
56 {
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
57 // tag::load_string[]
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
58 // You can use load to load document from null-terminated strings, for example literals:
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
59 pugi::xml_parse_result result = doc.load_string("<mesh name='sphere'><bounds>0 0 1 1</bounds></mesh>");
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
60 // end::load_string[]
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
61
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
62 std::cout << "Load result: " << result.description() << ", mesh name: " << doc.child("mesh").attribute("name").value() << std::endl;
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
63 }
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
64 }
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
65
d10b6c6b432e add xml lib, we will need to use it eventually
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
66 // vim:et