初始提交: UE5.3项目基础框架

Plugins/CesiumForUnreal/Source/ThirdParty/include/CesiumJsonReader/IntegerJsonHandler.h

@@ -0,0 +1,79 @@
+#pragma once
+
+#include "CesiumUtility/Assert.h"
+#include "JsonHandler.h"
+#include "Library.h"
+
+#include <cmath>
+
+namespace CesiumJsonReader {
+/**
+ * @brief \ref IJsonHandler for reading integer values.
+ */
+template <typename T>
+class CESIUMJSONREADER_API IntegerJsonHandler : public JsonHandler {
+public:
+  IntegerJsonHandler() noexcept : JsonHandler() {}
+
+  /**
+   * @brief Resets the parent \ref IJsonHandler of this instance and sets the
+   * pointer to its destination integer value.
+   */
+  void reset(IJsonHandler* pParent, T* pInteger) {
+    JsonHandler::reset(pParent);
+    this->_pInteger = pInteger;
+  }
+
+  /**
+   * @brief Obtains the integer pointer set on this handler by \ref reset.
+   */
+  T* getObject() { return this->_pInteger; }
+
+  /** @copydoc IJsonHandler::readInt32 */
+  virtual IJsonHandler* readInt32(int32_t i) override {
+    CESIUM_ASSERT(this->_pInteger);
+    *this->_pInteger = static_cast<T>(i);
+    return this->parent();
+  }
+  /** @copydoc IJsonHandler::readUint32 */
+  virtual IJsonHandler* readUint32(uint32_t i) override {
+    CESIUM_ASSERT(this->_pInteger);
+    *this->_pInteger = static_cast<T>(i);
+    return this->parent();
+  }
+  /** @copydoc IJsonHandler::readInt64 */
+  virtual IJsonHandler* readInt64(int64_t i) override {
+    CESIUM_ASSERT(this->_pInteger);
+    *this->_pInteger = static_cast<T>(i);
+    return this->parent();
+  }
+  /** @copydoc IJsonHandler::readUint64 */
+  virtual IJsonHandler* readUint64(uint64_t i) override {
+    CESIUM_ASSERT(this->_pInteger);
+    *this->_pInteger = static_cast<T>(i);
+    return this->parent();
+  }
+  /** @copydoc IJsonHandler::readDouble */
+  virtual IJsonHandler* readDouble(double d) override {
+    CESIUM_ASSERT(this->_pInteger);
+    double intPart;
+    double fractPart = std::modf(d, &intPart);
+    if (fractPart != 0) {
+      return JsonHandler::readDouble(d);
+    }
+    *this->_pInteger = static_cast<T>(intPart);
+    return this->parent();
+  }
+
+  /** @copydoc IJsonHandler::reportWarning */
+  virtual void reportWarning(
+      const std::string& warning,
+      std::vector<std::string>&& context) override {
+    context.push_back("(expecting an integer)");
+    this->parent()->reportWarning(warning, std::move(context));
+  }
+
+private:
+  T* _pInteger = nullptr;
+};
+} // namespace CesiumJsonReader