Big refactor, shuffling a lot of files around

src/util/xml_.cpp

@@ -0,0 +1,38 @@
+#include "xml_.h"
+
+#include "math_.h"
+
+using namespace tinyxml2;
+
+namespace anm2ed::util::xml
+{
+  std::string document_to_string(XMLDocument& self)
+  {
+    XMLPrinter printer{};
+    self.Print(&printer);
+    return std::string(printer.CStr());
+  }
+
+  XMLError query_string_attribute(XMLElement* element, const char* attribute, std::string* out)
+  {
+    const char* temp = nullptr;
+    auto result = element->QueryStringAttribute(attribute, &temp);
+    if (result == XML_SUCCESS && temp) *out = temp;
+    return result;
+  }
+
+  XMLError query_path_attribute(XMLElement* element, const char* attribute, std::filesystem::path* out)
+  {
+    std::string temp{};
+    auto result = query_string_attribute(element, attribute, &temp);
+    if (result == XML_SUCCESS) *out = temp;
+    return result;
+  }
+
+  void query_color_attribute(XMLElement* element, const char* attribute, float& out)
+  {
+    int value{};
+    element->QueryIntAttribute(attribute, &value);
+    out = math::uint8_to_float(value);
+  }
+}