/*
- * Copyright 2014 Facebook, Inc.
+ * Copyright 2017 Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* limitations under the License.
*/
-#include "folly/dynamic.h"
+#include <folly/dynamic.h>
+
+#include <folly/Assume.h>
+#include <folly/Hash.h>
+#include <folly/portability/BitsFunctexcept.h>
namespace folly {
//////////////////////////////////////////////////////////////////////
-#define DEF_TYPE(T, str, typen) \
- template<> char const dynamic::TypeInfo<T>::name[] = str; \
- template<> dynamic::Type const dynamic::TypeInfo<T>::type = typen
+#define FOLLY_DYNAMIC_DEF_TYPEINFO(T) \
+ constexpr const char* dynamic::TypeInfo<T>::name; \
+ constexpr dynamic::Type dynamic::TypeInfo<T>::type; \
+ //
-DEF_TYPE(void*, "null", dynamic::NULLT);
-DEF_TYPE(bool, "boolean", dynamic::BOOL);
-DEF_TYPE(fbstring, "string", dynamic::STRING);
-DEF_TYPE(dynamic::Array, "array", dynamic::ARRAY);
-DEF_TYPE(double, "double", dynamic::DOUBLE);
-DEF_TYPE(int64_t, "int64", dynamic::INT64);
-DEF_TYPE(dynamic::ObjectImpl, "object", dynamic::OBJECT);
+FOLLY_DYNAMIC_DEF_TYPEINFO(std::nullptr_t)
+FOLLY_DYNAMIC_DEF_TYPEINFO(bool)
+FOLLY_DYNAMIC_DEF_TYPEINFO(std::string)
+FOLLY_DYNAMIC_DEF_TYPEINFO(dynamic::Array)
+FOLLY_DYNAMIC_DEF_TYPEINFO(double)
+FOLLY_DYNAMIC_DEF_TYPEINFO(int64_t)
+FOLLY_DYNAMIC_DEF_TYPEINFO(dynamic::ObjectImpl)
-#undef DEF_TYPE
+#undef FOLLY_DYNAMIC_DEF_TYPEINFO
const char* dynamic::typeName() const {
return typeName(type_);
}
-//////////////////////////////////////////////////////////////////////
+TypeError::TypeError(const std::string& expected, dynamic::Type actual)
+ : std::runtime_error(to<std::string>("TypeError: expected dynamic "
+ "type `", expected, '\'', ", but had type `",
+ dynamic::typeName(actual), '\''))
+{}
+
+TypeError::TypeError(const std::string& expected,
+ dynamic::Type actual1, dynamic::Type actual2)
+ : std::runtime_error(to<std::string>("TypeError: expected dynamic "
+ "types `", expected, '\'', ", but had types `",
+ dynamic::typeName(actual1), "' and `", dynamic::typeName(actual2),
+ '\''))
+{}
+
+TypeError::~TypeError() = default;
+
+// This is a higher-order preprocessor macro to aid going from runtime
+// types to the compile time type system.
+#define FB_DYNAMIC_APPLY(type, apply) \
+ do { \
+ switch ((type)) { \
+ case NULLT: \
+ apply(std::nullptr_t); \
+ break; \
+ case ARRAY: \
+ apply(Array); \
+ break; \
+ case BOOL: \
+ apply(bool); \
+ break; \
+ case DOUBLE: \
+ apply(double); \
+ break; \
+ case INT64: \
+ apply(int64_t); \
+ break; \
+ case OBJECT: \
+ apply(ObjectImpl); \
+ break; \
+ case STRING: \
+ apply(std::string); \
+ break; \
+ default: \
+ CHECK(0); \
+ abort(); \
+ } \
+ } while (0)
+
+bool dynamic::operator<(dynamic const& o) const {
+ if (UNLIKELY(type_ == OBJECT || o.type_ == OBJECT)) {
+ throw TypeError("object", type_);
+ }
+ if (type_ != o.type_) {
+ return type_ < o.type_;
+ }
+
+#define FB_X(T) return CompareOp<T>::comp(*getAddress<T>(), \
+ *o.getAddress<T>())
+ FB_DYNAMIC_APPLY(type_, FB_X);
+#undef FB_X
+}
+
+bool dynamic::operator==(dynamic const& o) const {
+ if (type() != o.type()) {
+ if (isNumber() && o.isNumber()) {
+ auto& integ = isInt() ? *this : o;
+ auto& doubl = isInt() ? o : *this;
+ return integ.asInt() == doubl.asDouble();
+ }
+ return false;
+ }
+
+#define FB_X(T) return *getAddress<T>() == *o.getAddress<T>();
+ FB_DYNAMIC_APPLY(type_, FB_X);
+#undef FB_X
+}
+
+dynamic& dynamic::operator=(dynamic const& o) {
+ if (&o != this) {
+ if (type_ == o.type_) {
+#define FB_X(T) *getAddress<T>() = *o.getAddress<T>()
+ FB_DYNAMIC_APPLY(type_, FB_X);
+#undef FB_X
+ } else {
+ destroy();
+#define FB_X(T) new (getAddress<T>()) T(*o.getAddress<T>())
+ FB_DYNAMIC_APPLY(o.type_, FB_X);
+#undef FB_X
+ type_ = o.type_;
+ }
+ }
+ return *this;
+}
+
+dynamic& dynamic::operator=(dynamic&& o) noexcept {
+ if (&o != this) {
+ if (type_ == o.type_) {
+#define FB_X(T) *getAddress<T>() = std::move(*o.getAddress<T>())
+ FB_DYNAMIC_APPLY(type_, FB_X);
+#undef FB_X
+ } else {
+ destroy();
+#define FB_X(T) new (getAddress<T>()) T(std::move(*o.getAddress<T>()))
+ FB_DYNAMIC_APPLY(o.type_, FB_X);
+#undef FB_X
+ type_ = o.type_;
+ }
+ }
+ return *this;
+}
+
+dynamic& dynamic::operator[](dynamic const& k) & {
+ if (!isObject() && !isArray()) {
+ throw TypeError("object/array", type());
+ }
+ if (isArray()) {
+ return at(k);
+ }
+ auto& obj = get<ObjectImpl>();
+ auto ret = obj.insert({k, nullptr});
+ return ret.first->second;
+}
+
+dynamic dynamic::getDefault(const dynamic& k, const dynamic& v) const& {
+ auto& obj = get<ObjectImpl>();
+ auto it = obj.find(k);
+ return it == obj.end() ? v : it->second;
+}
+
+dynamic dynamic::getDefault(const dynamic& k, dynamic&& v) const& {
+ auto& obj = get<ObjectImpl>();
+ auto it = obj.find(k);
+ // Avoid clang bug with ternary
+ if (it == obj.end()) {
+ return std::move(v);
+ } else {
+ return it->second;
+ }
+}
+dynamic dynamic::getDefault(const dynamic& k, const dynamic& v) && {
+ auto& obj = get<ObjectImpl>();
+ auto it = obj.find(k);
+ // Avoid clang bug with ternary
+ if (it == obj.end()) {
+ return v;
+ } else {
+ return std::move(it->second);
+ }
}
+dynamic dynamic::getDefault(const dynamic& k, dynamic&& v) && {
+ auto& obj = get<ObjectImpl>();
+ auto it = obj.find(k);
+ return std::move(it == obj.end() ? v : it->second);
+}
+
+const dynamic* dynamic::get_ptr(dynamic const& idx) const& {
+ if (auto* parray = get_nothrow<Array>()) {
+ if (!idx.isInt()) {
+ throw TypeError("int64", idx.type());
+ }
+ if (idx < 0 || idx >= parray->size()) {
+ return nullptr;
+ }
+ return &(*parray)[size_t(idx.asInt())];
+ } else if (auto* pobject = get_nothrow<ObjectImpl>()) {
+ auto it = pobject->find(idx);
+ if (it == pobject->end()) {
+ return nullptr;
+ }
+ return &it->second;
+ } else {
+ throw TypeError("object/array", type());
+ }
+}
+
+dynamic const& dynamic::at(dynamic const& idx) const& {
+ if (auto* parray = get_nothrow<Array>()) {
+ if (!idx.isInt()) {
+ throw TypeError("int64", idx.type());
+ }
+ if (idx < 0 || idx >= parray->size()) {
+ std::__throw_out_of_range("out of range in dynamic array");
+ }
+ return (*parray)[size_t(idx.asInt())];
+ } else if (auto* pobject = get_nothrow<ObjectImpl>()) {
+ auto it = pobject->find(idx);
+ if (it == pobject->end()) {
+ throw std::out_of_range(to<std::string>(
+ "couldn't find key ", idx.asString(), " in dynamic object"));
+ }
+ return it->second;
+ } else {
+ throw TypeError("object/array", type());
+ }
+}
+
+std::size_t dynamic::size() const {
+ if (auto* ar = get_nothrow<Array>()) {
+ return ar->size();
+ }
+ if (auto* obj = get_nothrow<ObjectImpl>()) {
+ return obj->size();
+ }
+ if (auto* str = get_nothrow<std::string>()) {
+ return str->size();
+ }
+ throw TypeError("array/object", type());
+}
+
+dynamic::iterator dynamic::erase(const_iterator first, const_iterator last) {
+ auto& arr = get<Array>();
+ return get<Array>().erase(
+ arr.begin() + (first - arr.begin()),
+ arr.begin() + (last - arr.begin()));
+}
+
+std::size_t dynamic::hash() const {
+ switch (type()) {
+ case OBJECT:
+ case ARRAY:
+ case NULLT:
+ throw TypeError("not null/object/array", type());
+ case INT64:
+ return std::hash<int64_t>()(getInt());
+ case DOUBLE:
+ return std::hash<double>()(getDouble());
+ case BOOL:
+ return std::hash<bool>()(getBool());
+ case STRING: {
+ // keep it compatible with FBString
+ const auto& str = getString();
+ return ::folly::hash::fnv32_buf(str.data(), str.size());
+ }
+ }
+ assume_unreachable();
+}
+
+char const* dynamic::typeName(Type t) {
+#define FB_X(T) return TypeInfo<T>::name
+ FB_DYNAMIC_APPLY(t, FB_X);
+#undef FB_X
+}
+
+void dynamic::destroy() noexcept {
+ // This short-circuit speeds up some microbenchmarks.
+ if (type_ == NULLT) return;
+
+#define FB_X(T) detail::Destroy::destroy(getAddress<T>())
+ FB_DYNAMIC_APPLY(type_, FB_X);
+#undef FB_X
+ type_ = NULLT;
+ u_.nul = nullptr;
+}
+
+//////////////////////////////////////////////////////////////////////
+
+}
projects / folly.git / blobdiff