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-rw-r--r--src/core/script/Variant.cpp80
-rw-r--r--src/core/script/Variant.hpp274
2 files changed, 354 insertions, 0 deletions
diff --git a/src/core/script/Variant.cpp b/src/core/script/Variant.cpp
new file mode 100644
index 0000000..623b396
--- /dev/null
+++ b/src/core/script/Variant.cpp
@@ -0,0 +1,80 @@
+/*
+ Ousía
+ Copyright (C) 2014, 2015 Benjamin Paaßen, Andreas Stöckel
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "Variant.hpp"
+
+namespace ousia {
+namespace script {
+
+std::ostream& operator<< (std::ostream& os, const Variant &v)
+{
+ switch (v.type) {
+ case VariantType::none:
+ os << "null";
+ break;
+ case VariantType::integer:
+ os << v.integerValue;
+ break;
+ case VariantType::number:
+ os << v.numberValue;
+ break;
+ case VariantType::string:
+ os << "\"" << v.stringValue << "\"";
+ break;
+ case VariantType::array: {
+ bool first = true;
+ os << "[";
+ for (auto &v2 : v.arrayValue) {
+ if (!first) {
+ os << ", ";
+ }
+ os << v2;
+ first = false;
+ }
+ os << "]";
+ break;
+ }
+ case VariantType::map: {
+ bool first = true;
+ os << "{";
+ for (auto &v2 : v.mapValue) {
+ if (!first) {
+ os << ", ";
+ }
+ os << "\"" << v2.first << "\": " << v2.second;
+ first = false;
+ }
+ os << "}";
+ break;
+ }
+ case VariantType::function:
+ os << "<Function>";
+ break;
+ case VariantType::object:
+ os << "<Object>";
+ break;
+ case VariantType::buffer:
+ os << "<Buffer>";
+ break;
+ }
+ return os;
+}
+
+}
+}
+
diff --git a/src/core/script/Variant.hpp b/src/core/script/Variant.hpp
new file mode 100644
index 0000000..208bfa5
--- /dev/null
+++ b/src/core/script/Variant.hpp
@@ -0,0 +1,274 @@
+/*
+ Ousía
+ Copyright (C) 2014, 2015 Benjamin Paaßen, Andreas Stöckel
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef _OUSIA_VARIANT_HPP_
+#define _OUSIA_VARIANT_HPP_
+
+#include <cstdint>
+#include <ostream>
+#include <string>
+#include <vector>
+#include <map>
+
+namespace ousia {
+namespace script {
+
+/**
+ * Enum containing the possible types a variant may have.
+ */
+enum class VariantType {
+ none, integer, number, string, array, map, function, object, buffer
+};
+
+/**
+ * Instances of the Variant class represent any kind of data that is exchanged
+ * between the host application and the script engine.
+ */
+class Variant {
+
+private:
+ VariantType type;
+
+ union {
+ int64_t integerValue;
+ double numberValue;
+ std::string stringValue;
+ std::vector<Variant> arrayValue;
+ std::map<std::string, Variant> mapValue;
+ };
+
+ /**
+ * Private function calling the destructor of the currently used union
+ * member.
+ */
+ void free() {
+ // Explicitly call the destructor
+ switch (type) {
+ case VariantType::string:
+ stringValue.std::string::~string();
+ break;
+ case VariantType::array:
+ arrayValue.std::vector<Variant>::~vector();
+ break;
+ case VariantType::map:
+ mapValue.std::map<std::string, Variant>::~map();
+ break;
+ default:
+ break;
+ }
+
+ // Reset the type
+ type = VariantType::none;
+ }
+
+ /**
+ * Function for copying the content of the given instance v to this
+ * instance. Callers must make sure the storage space has been freed
+ * beforehand.
+ */
+ void copy(const Variant &v)
+ {
+ type = v.type;
+ switch (type) {
+ case VariantType::integer:
+ integerValue = v.integerValue;
+ break;
+ case VariantType::number:
+ numberValue = v.numberValue;
+ break;
+ case VariantType::string:
+ new (&stringValue) std::string(v.stringValue);
+ break;
+ case VariantType::array:
+ new (&arrayValue) std::vector<Variant>(v.arrayValue);
+ break;
+ case VariantType::map:
+ new (&mapValue) std::map<std::string, Variant>(v.mapValue);
+ break;
+ default:
+ break;
+ }
+ }
+
+ /**
+ * Function for moving the content of the given instance v to this instance.
+ * No copy operation is used. Callers must make sure the storage space has
+ * been freed beforehand.
+ */
+ void move(Variant &v)
+ {
+ type = v.type;
+ switch (type) {
+ case VariantType::integer:
+ integerValue = v.integerValue;
+ break;
+ case VariantType::number:
+ numberValue = v.numberValue;
+ break;
+ case VariantType::string:
+ new (&stringValue) std::string(std::move(v.stringValue));
+ break;
+ case VariantType::array:
+ new (&arrayValue) std::vector<Variant>(std::move(v.arrayValue));
+ break;
+ case VariantType::map:
+ new (&mapValue) std::map<std::string, Variant>(std::move(v.mapValue));
+ break;
+ default:
+ break;
+ }
+
+ // Reset the type of v to "none"
+ v.type = VariantType::none;
+ }
+
+public:
+
+ class EBadEntry {};
+
+ Variant(const Variant &v)
+ {
+ copy(v);
+ }
+
+ Variant(Variant &&v)
+ {
+ move(v);
+ }
+
+ Variant& operator=(const Variant &v)
+ {
+ free();
+ copy(v);
+ return *this;
+ }
+
+ Variant& operator=(Variant &&v)
+ {
+ free();
+ move(v);
+ return *this;
+ }
+
+
+ Variant(int64_t i) :
+ type(VariantType::integer),
+ integerValue(i)
+ {
+ // Do nothing here
+ }
+
+ Variant(double d) :
+ type(VariantType::number),
+ numberValue(d)
+ {
+ // Do nothing here
+ }
+
+ Variant(const char *s) :
+ type(VariantType::string)
+ {
+ new (&stringValue) std::string(s);
+ }
+
+ Variant(const std::vector<Variant> &a) :
+ type(VariantType::array)
+ {
+ new (&arrayValue) std::vector<Variant>(a);
+ }
+
+
+ Variant(const std::map<std::string, Variant> &m) :
+ type(VariantType::map)
+ {
+ new (&mapValue) std::map<std::string, Variant>(m);
+ }
+
+ ~Variant()
+ {
+ free();
+ }
+
+ VariantType getType() const
+ {
+ return type;
+ }
+
+ int64_t getIntegerValue() const
+ {
+ switch (type) {
+ case VariantType::integer:
+ return integerValue;
+ case VariantType::number:
+ return static_cast<int64_t>(numberValue);
+ default:
+ throw EBadEntry{};
+ }
+ }
+
+ double getNumberValue() const
+ {
+ switch (type) {
+ case VariantType::integer:
+ return static_cast<double>(integerValue);
+ case VariantType::number:
+ return numberValue;
+ default:
+ throw EBadEntry{};
+ }
+ }
+
+ std::string getStringValue() const
+ {
+ switch (type) {
+ case VariantType::string:
+ return stringValue;
+ default:
+ throw EBadEntry {};
+ }
+ }
+
+ const std::vector<Variant>& getArrayValue() const
+ {
+ switch (type) {
+ case VariantType::array:
+ return arrayValue;
+ default:
+ throw EBadEntry {};
+ }
+ }
+
+ const std::map<std::string, Variant>& getMapValue() const
+ {
+ switch (type) {
+ case VariantType::map:
+ return mapValue;
+ default:
+ throw EBadEntry {};
+ }
+ }
+
+ friend std::ostream& operator<< (std::ostream& os, const Variant &v);
+
+};
+
+}
+}
+
+#endif /* _OUSIA_VARIANT_HPP_ */
+
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