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annotate dep/pugixml/docs/samples/include.cpp @ 137:69db40272acd

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dep/animia: [WIP] huge refactor this WILL NOT compile, because lots of code has been changed and every API in the original codebase has been removed. note that this api setup is not exactly permanent...
author Paper <mrpapersonic@gmail.com>
date Fri, 10 Nov 2023 13:52:47 -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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55
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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