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

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*: 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
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1 #include "pugixml.hpp"
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2
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3 #include <string.h>
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4 #include <iostream>
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5
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6 // tag::code[]
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7 bool load_preprocess(pugi::xml_document& doc, const char* path);
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8
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9 bool preprocess(pugi::xml_node node)
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10 {
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11 for (pugi::xml_node child = node.first_child(); child; )
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12 {
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13 if (child.type() == pugi::node_pi && strcmp(child.name(), "include") == 0)
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14 {
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15 pugi::xml_node include = child;
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16
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17 // load new preprocessed document (note: ideally this should handle relative paths)
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18 const char* path = include.value();
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19
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20 pugi::xml_document doc;
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21 if (!load_preprocess(doc, path)) return false;
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22
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23 // insert the comment marker above include directive
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24 node.insert_child_before(pugi::node_comment, include).set_value(path);
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25
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26 // copy the document above the include directive (this retains the original order!)
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27 for (pugi::xml_node ic = doc.first_child(); ic; ic = ic.next_sibling())
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28 {
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29 node.insert_copy_before(ic, include);
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30 }
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31
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32 // remove the include node and move to the next child
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33 child = child.next_sibling();
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34
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35 node.remove_child(include);
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36 }
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37 else
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38 {
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39 if (!preprocess(child)) return false;
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40
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41 child = child.next_sibling();
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42 }
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43 }
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44
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45 return true;
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46 }
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47
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48 bool load_preprocess(pugi::xml_document& doc, const char* path)
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49 {
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50 pugi::xml_parse_result result = doc.load_file(path, pugi::parse_default | pugi::parse_pi); // for <?include?>
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51
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52 return result ? preprocess(doc) : false;
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53 }
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54 // end::code[]
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56 int main()
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57 {
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58 pugi::xml_document doc;
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59 if (!load_preprocess(doc, "character.xml")) return -1;
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60
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61 doc.print(std::cout);
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62 }
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63
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64 // vim:et