diff options
Diffstat (limited to 'src/value.cpp')
| -rw-r--r-- | src/value.cpp | 576 |
1 files changed, 293 insertions, 283 deletions
diff --git a/src/value.cpp b/src/value.cpp index bf0ffcad78..3a9ccb71bc 100644 --- a/src/value.cpp +++ b/src/value.cpp @@ -32,286 +32,296 @@ namespace nbt { -value::value(tag&& t): - tag_(std::move(t).move_clone()) -{} - -value::value(const value& rhs): - tag_(rhs.tag_ ? rhs.tag_->clone() : nullptr) -{} - -value& value::operator=(const value& rhs) -{ - if(this != &rhs) - { - tag_ = rhs.tag_ ? rhs.tag_->clone() : nullptr; - } - return *this; -} - -value& value::operator=(tag&& t) -{ - set(std::move(t)); - return *this; -} - -void value::set(tag&& t) -{ - if(tag_) - tag_->assign(std::move(t)); - else - tag_ = std::move(t).move_clone(); -} - -//Primitive assignment -namespace // helper functions local to this translation unit -{ - template<typename T> - void assign_numeric_impl(std::unique_ptr<tag>& tag_ptr, T val, - tag_type default_type) - { - using nbt::tag_type; - if(!tag_ptr) - { - tag_ptr = tag::create(default_type, val); - return; - } - - // Determine the incoming tag type for T - auto incoming_type = detail::get_primitive_type<T>::value; - - // If the existing tag is of a narrower type than the incoming type, - // reject the assignment to avoid widening the stored tag type. - auto existing_type = tag_ptr->get_type(); - - if(static_cast<int>(existing_type) < static_cast<int>(incoming_type)) - { - throw std::bad_cast(); - } - - // Existing type is same or wider: write into the existing tag (may narrow) - switch(existing_type) - { - case tag_type::Byte: static_cast<tag_byte&>(*tag_ptr).set(static_cast<int8_t>(val)); break; - case tag_type::Short: static_cast<tag_short&>(*tag_ptr).set(static_cast<int16_t>(val)); break; - case tag_type::Int: static_cast<tag_int&>(*tag_ptr).set(static_cast<int32_t>(val)); break; - case tag_type::Long: static_cast<tag_long&>(*tag_ptr).set(static_cast<int64_t>(val)); break; - case tag_type::Float: static_cast<tag_float&>(*tag_ptr).set(static_cast<float>(val)); break; - case tag_type::Double: static_cast<tag_double&>(*tag_ptr).set(static_cast<double>(val)); break; - default: throw std::bad_cast(); - } - } -} - -value& value::operator=(int8_t val) -{ - assign_numeric_impl(tag_, val, tag_type::Byte); - return *this; -} - -value& value::operator=(int16_t val) -{ - assign_numeric_impl(tag_, val, tag_type::Short); - return *this; -} - -value& value::operator=(int32_t val) -{ - assign_numeric_impl(tag_, val, tag_type::Int); - return *this; -} - -value& value::operator=(int64_t val) -{ - assign_numeric_impl(tag_, val, tag_type::Long); - return *this; -} - -value& value::operator=(float val) -{ - assign_numeric_impl(tag_, val, tag_type::Float); - return *this; -} - -value& value::operator=(double val) -{ - assign_numeric_impl(tag_, val, tag_type::Double); - return *this; -} - -//Primitive conversion -value::operator int8_t() const -{ - switch(tag_->get_type()) - { - case tag_type::Byte: - return static_cast<tag_byte&>(*tag_).get(); - - default: - throw std::bad_cast(); - } -} - -value::operator int16_t() const -{ - switch(tag_->get_type()) - { - case tag_type::Byte: - return static_cast<tag_byte&>(*tag_).get(); - case tag_type::Short: - return static_cast<tag_short&>(*tag_).get(); - - default: - throw std::bad_cast(); - } -} - -value::operator int32_t() const -{ - switch(tag_->get_type()) - { - case tag_type::Byte: - return static_cast<tag_byte&>(*tag_).get(); - case tag_type::Short: - return static_cast<tag_short&>(*tag_).get(); - case tag_type::Int: - return static_cast<tag_int&>(*tag_).get(); - - default: - throw std::bad_cast(); - } -} - -value::operator int64_t() const -{ - switch(tag_->get_type()) - { - case tag_type::Byte: - return static_cast<tag_byte&>(*tag_).get(); - case tag_type::Short: - return static_cast<tag_short&>(*tag_).get(); - case tag_type::Int: - return static_cast<tag_int&>(*tag_).get(); - case tag_type::Long: - return static_cast<tag_long&>(*tag_).get(); - - default: - throw std::bad_cast(); - } -} - -value::operator float() const -{ - switch(tag_->get_type()) - { - case tag_type::Byte: - return static_cast<tag_byte&>(*tag_).get(); - case tag_type::Short: - return static_cast<tag_short&>(*tag_).get(); - case tag_type::Int: - return static_cast<tag_int&>(*tag_).get(); - case tag_type::Long: - return static_cast<tag_long&>(*tag_).get(); - case tag_type::Float: - return static_cast<tag_float&>(*tag_).get(); - - default: - throw std::bad_cast(); - } -} - -value::operator double() const -{ - switch(tag_->get_type()) - { - case tag_type::Byte: - return static_cast<tag_byte&>(*tag_).get(); - case tag_type::Short: - return static_cast<tag_short&>(*tag_).get(); - case tag_type::Int: - return static_cast<tag_int&>(*tag_).get(); - case tag_type::Long: - return static_cast<tag_long&>(*tag_).get(); - case tag_type::Float: - return static_cast<tag_float&>(*tag_).get(); - case tag_type::Double: - return static_cast<tag_double&>(*tag_).get(); - - default: - throw std::bad_cast(); - } -} - -value& value::operator=(std::string&& str) -{ - if(!tag_) - set(tag_string(std::move(str))); - else - dynamic_cast<tag_string&>(*tag_).set(std::move(str)); - return *this; -} - -value::operator const std::string&() const -{ - return dynamic_cast<tag_string&>(*tag_).get(); -} - -value& value::at(const std::string& key) -{ - return dynamic_cast<tag_compound&>(*tag_).at(key); -} - -const value& value::at(const std::string& key) const -{ - return dynamic_cast<const tag_compound&>(*tag_).at(key); -} - -value& value::operator[](const std::string& key) -{ - return dynamic_cast<tag_compound&>(*tag_)[key]; -} - -value& value::operator[](const char* key) -{ - return (*this)[std::string(key)]; -} - -value& value::at(size_t i) -{ - return dynamic_cast<tag_list&>(*tag_).at(i); -} - -const value& value::at(size_t i) const -{ - return dynamic_cast<const tag_list&>(*tag_).at(i); -} - -value& value::operator[](size_t i) -{ - return dynamic_cast<tag_list&>(*tag_)[i]; -} - -const value& value::operator[](size_t i) const -{ - return dynamic_cast<const tag_list&>(*tag_)[i]; -} - -tag_type value::get_type() const -{ - return tag_ ? tag_->get_type() : tag_type::Null; -} - -bool operator==(const value& lhs, const value& rhs) -{ - if(lhs.tag_ != nullptr && rhs.tag_ != nullptr) - return *lhs.tag_ == *rhs.tag_; - else - return lhs.tag_ == nullptr && rhs.tag_ == nullptr; -} - -bool operator!=(const value& lhs, const value& rhs) -{ - return !(lhs == rhs); -} - -} + value::value(tag&& t) : tag_(std::move(t).move_clone()) {} + + value::value(const value& rhs) + : tag_(rhs.tag_ ? rhs.tag_->clone() : nullptr) + { + } + + value& value::operator=(const value& rhs) + { + if (this != &rhs) { + tag_ = rhs.tag_ ? rhs.tag_->clone() : nullptr; + } + return *this; + } + + value& value::operator=(tag&& t) + { + set(std::move(t)); + return *this; + } + + void value::set(tag&& t) + { + if (tag_) + tag_->assign(std::move(t)); + else + tag_ = std::move(t).move_clone(); + } + + // Primitive assignment + namespace // helper functions local to this translation unit + { + template <typename T> + void assign_numeric_impl(std::unique_ptr<tag>& tag_ptr, T val, + tag_type default_type) + { + using nbt::tag_type; + if (!tag_ptr) { + tag_ptr = tag::create(default_type, val); + return; + } + + // Determine the incoming tag type for T + auto incoming_type = detail::get_primitive_type<T>::value; + + // If the existing tag is of a narrower type than the incoming type, + // reject the assignment to avoid widening the stored tag type. + auto existing_type = tag_ptr->get_type(); + + if (static_cast<int>(existing_type) < + static_cast<int>(incoming_type)) { + throw std::bad_cast(); + } + + // Existing type is same or wider: write into the existing tag (may + // narrow) + switch (existing_type) { + case tag_type::Byte: + static_cast<tag_byte&>(*tag_ptr).set( + static_cast<int8_t>(val)); + break; + case tag_type::Short: + static_cast<tag_short&>(*tag_ptr).set( + static_cast<int16_t>(val)); + break; + case tag_type::Int: + static_cast<tag_int&>(*tag_ptr).set( + static_cast<int32_t>(val)); + break; + case tag_type::Long: + static_cast<tag_long&>(*tag_ptr).set( + static_cast<int64_t>(val)); + break; + case tag_type::Float: + static_cast<tag_float&>(*tag_ptr).set( + static_cast<float>(val)); + break; + case tag_type::Double: + static_cast<tag_double&>(*tag_ptr).set( + static_cast<double>(val)); + break; + default: + throw std::bad_cast(); + } + } + } // namespace + + value& value::operator=(int8_t val) + { + assign_numeric_impl(tag_, val, tag_type::Byte); + return *this; + } + + value& value::operator=(int16_t val) + { + assign_numeric_impl(tag_, val, tag_type::Short); + return *this; + } + + value& value::operator=(int32_t val) + { + assign_numeric_impl(tag_, val, tag_type::Int); + return *this; + } + + value& value::operator=(int64_t val) + { + assign_numeric_impl(tag_, val, tag_type::Long); + return *this; + } + + value& value::operator=(float val) + { + assign_numeric_impl(tag_, val, tag_type::Float); + return *this; + } + + value& value::operator=(double val) + { + assign_numeric_impl(tag_, val, tag_type::Double); + return *this; + } + + // Primitive conversion + value::operator int8_t() const + { + switch (tag_->get_type()) { + case tag_type::Byte: + return static_cast<tag_byte&>(*tag_).get(); + + default: + throw std::bad_cast(); + } + } + + value::operator int16_t() const + { + switch (tag_->get_type()) { + case tag_type::Byte: + return static_cast<tag_byte&>(*tag_).get(); + case tag_type::Short: + return static_cast<tag_short&>(*tag_).get(); + + default: + throw std::bad_cast(); + } + } + + value::operator int32_t() const + { + switch (tag_->get_type()) { + case tag_type::Byte: + return static_cast<tag_byte&>(*tag_).get(); + case tag_type::Short: + return static_cast<tag_short&>(*tag_).get(); + case tag_type::Int: + return static_cast<tag_int&>(*tag_).get(); + + default: + throw std::bad_cast(); + } + } + + value::operator int64_t() const + { + switch (tag_->get_type()) { + case tag_type::Byte: + return static_cast<tag_byte&>(*tag_).get(); + case tag_type::Short: + return static_cast<tag_short&>(*tag_).get(); + case tag_type::Int: + return static_cast<tag_int&>(*tag_).get(); + case tag_type::Long: + return static_cast<tag_long&>(*tag_).get(); + + default: + throw std::bad_cast(); + } + } + + value::operator float() const + { + switch (tag_->get_type()) { + case tag_type::Byte: + return static_cast<tag_byte&>(*tag_).get(); + case tag_type::Short: + return static_cast<tag_short&>(*tag_).get(); + case tag_type::Int: + return static_cast<tag_int&>(*tag_).get(); + case tag_type::Long: + return static_cast<tag_long&>(*tag_).get(); + case tag_type::Float: + return static_cast<tag_float&>(*tag_).get(); + + default: + throw std::bad_cast(); + } + } + + value::operator double() const + { + switch (tag_->get_type()) { + case tag_type::Byte: + return static_cast<tag_byte&>(*tag_).get(); + case tag_type::Short: + return static_cast<tag_short&>(*tag_).get(); + case tag_type::Int: + return static_cast<tag_int&>(*tag_).get(); + case tag_type::Long: + return static_cast<tag_long&>(*tag_).get(); + case tag_type::Float: + return static_cast<tag_float&>(*tag_).get(); + case tag_type::Double: + return static_cast<tag_double&>(*tag_).get(); + + default: + throw std::bad_cast(); + } + } + + value& value::operator=(std::string&& str) + { + if (!tag_) + set(tag_string(std::move(str))); + else + dynamic_cast<tag_string&>(*tag_).set(std::move(str)); + return *this; + } + + value::operator const std::string&() const + { + return dynamic_cast<tag_string&>(*tag_).get(); + } + + value& value::at(const std::string& key) + { + return dynamic_cast<tag_compound&>(*tag_).at(key); + } + + const value& value::at(const std::string& key) const + { + return dynamic_cast<const tag_compound&>(*tag_).at(key); + } + + value& value::operator[](const std::string& key) + { + return dynamic_cast<tag_compound&>(*tag_)[key]; + } + + value& value::operator[](const char* key) + { + return (*this)[std::string(key)]; + } + + value& value::at(size_t i) + { + return dynamic_cast<tag_list&>(*tag_).at(i); + } + + const value& value::at(size_t i) const + { + return dynamic_cast<const tag_list&>(*tag_).at(i); + } + + value& value::operator[](size_t i) + { + return dynamic_cast<tag_list&>(*tag_)[i]; + } + + const value& value::operator[](size_t i) const + { + return dynamic_cast<const tag_list&>(*tag_)[i]; + } + + tag_type value::get_type() const + { + return tag_ ? tag_->get_type() : tag_type::Null; + } + + bool operator==(const value& lhs, const value& rhs) + { + if (lhs.tag_ != nullptr && rhs.tag_ != nullptr) + return *lhs.tag_ == *rhs.tag_; + else + return lhs.tag_ == nullptr && rhs.tag_ == nullptr; + } + + bool operator!=(const value& lhs, const value& rhs) + { + return !(lhs == rhs); + } + +} // namespace nbt |