diff --git a/include/json/value.h b/include/json/value.h index 073ed30..5f65443 100644 --- a/include/json/value.h +++ b/include/json/value.h @@ -39,6 +39,10 @@ #endif #endif +#if __cplusplus >= 201703L +#define JSONCPP_HAS_STRING_VIEW 1 +#endif + #include #include #include @@ -46,6 +50,10 @@ #include #include +#ifdef JSONCPP_HAS_STRING_VIEW +#include +#endif + // Disable warning C4251: : needs to have dll-interface to // be used by... #if defined(JSONCPP_DISABLE_DLL_INTERFACE_WARNING) @@ -342,6 +350,9 @@ public: */ Value(const StaticString& value); Value(const String& value); +#ifdef JSONCPP_HAS_STRING_VIEW + Value(std::string_view value); +#endif Value(bool value); Value(std::nullptr_t ptr) = delete; Value(const Value& other); @@ -384,6 +395,12 @@ public: * \return false if !string. (Seg-fault if str or end are NULL.) */ bool getString(char const** begin, char const** end) const; +#ifdef JSONCPP_HAS_STRING_VIEW + /** Get string_view of string-value. + * \return false if !string. (Seg-fault if str is NULL.) + */ + bool getString(std::string_view* str) const; +#endif Int asInt() const; UInt asUInt() const; #if defined(JSON_HAS_INT64) @@ -470,6 +487,15 @@ public: bool insert(ArrayIndex index, const Value& newValue); bool insert(ArrayIndex index, Value&& newValue); +#ifdef JSONCPP_HAS_STRING_VIEW + /// Access an object value by name, create a null member if it does not exist. + /// \param key may contain embedded nulls. + Value& operator[](std::string_view key); + /// Access an object value by name, returns null if there is no member with + /// that name. + /// \param key may contain embedded nulls. + const Value& operator[](std::string_view key) const; +#else /// Access an object value by name, create a null member if it does not exist. /// \note Because of our implementation, keys are limited to 2^30 -1 chars. /// Exceeding that will cause an exception. @@ -484,6 +510,7 @@ public: /// that name. /// \param key may contain embedded nulls. const Value& operator[](const String& key) const; +#endif /** \brief Access an object value by name, create a null member if it does not * exist. * @@ -497,18 +524,24 @@ public: * \endcode */ Value& operator[](const StaticString& key); +#ifdef JSONCPP_HAS_STRING_VIEW + /// Return the member named key if it exist, defaultValue otherwise. + /// \note deep copy + Value get(std::string_view key, const Value& defaultValue) const; +#else /// Return the member named key if it exist, defaultValue otherwise. /// \note deep copy Value get(const char* key, const Value& defaultValue) const; + /// Return the member named key if it exist, defaultValue otherwise. + /// \note deep copy + /// \param key may contain embedded nulls. + Value get(const String& key, const Value& defaultValue) const; +#endif /// Return the member named key if it exist, defaultValue otherwise. /// \note deep copy /// \note key may contain embedded nulls. Value get(const char* begin, const char* end, const Value& defaultValue) const; - /// Return the member named key if it exist, defaultValue otherwise. - /// \note deep copy - /// \param key may contain embedded nulls. - Value get(const String& key, const Value& defaultValue) const; /// Most general and efficient version of isMember()const, get()const, /// and operator[]const /// \note As stated elsewhere, behavior is undefined if (end-begin) >= 2^30 @@ -516,6 +549,29 @@ public: /// Most general and efficient version of isMember()const, get()const, /// and operator[]const Value const* find(const String& key) const; + + /// Calls find and only returns a valid pointer if the type is found + template + Value const* findValue(const String& key) const { + Value const* found = find(key); + if (!found || !(found->*TMemFn)()) + return nullptr; + return found; + } + + Value const* findNull(const String& key) const; + Value const* findBool(const String& key) const; + Value const* findInt(const String& key) const; + Value const* findInt64(const String& key) const; + Value const* findUInt(const String& key) const; + Value const* findUInt64(const String& key) const; + Value const* findIntegral(const String& key) const; + Value const* findDouble(const String& key) const; + Value const* findNumeric(const String& key) const; + Value const* findString(const String& key) const; + Value const* findArray(const String& key) const; + Value const* findObject(const String& key) const; + /// Most general and efficient version of object-mutators. /// \note As stated elsewhere, behavior is undefined if (end-begin) >= 2^30 /// \return non-zero, but JSON_ASSERT if this is neither object nor nullValue. @@ -525,20 +581,28 @@ public: /// Do nothing if it did not exist. /// \pre type() is objectValue or nullValue /// \post type() is unchanged +#if JSONCPP_HAS_STRING_VIEW + void removeMember(std::string_view key); +#else void removeMember(const char* key); /// Same as removeMember(const char*) /// \param key may contain embedded nulls. void removeMember(const String& key); - /// Same as removeMember(const char* begin, const char* end, Value* removed), - /// but 'key' is null-terminated. - bool removeMember(const char* key, Value* removed); +#endif /** \brief Remove the named map member. * * Update 'removed' iff removed. * \param key may contain embedded nulls. * \return true iff removed (no exceptions) */ +#if JSONCPP_HAS_STRING_VIEW + bool removeMember(std::string_view key, Value* removed); +#else bool removeMember(String const& key, Value* removed); + /// Same as removeMember(const char* begin, const char* end, Value* removed), + /// but 'key' is null-terminated. + bool removeMember(const char* key, Value* removed); +#endif /// Same as removeMember(String const& key, Value* removed) bool removeMember(const char* begin, const char* end, Value* removed); /** \brief Remove the indexed array element. @@ -549,12 +613,18 @@ public: */ bool removeIndex(ArrayIndex index, Value* removed); +#ifdef JSONCPP_HAS_STRING_VIEW + /// Return true if the object has a member named key. + /// \param key may contain embedded nulls. + bool isMember(std::string_view key) const; +#else /// Return true if the object has a member named key. /// \note 'key' must be null-terminated. bool isMember(const char* key) const; /// Return true if the object has a member named key. /// \param key may contain embedded nulls. bool isMember(const String& key) const; +#endif /// Same as isMember(String const& key)const bool isMember(const char* begin, const char* end) const; diff --git a/src/lib_json/json_value.cpp b/src/lib_json/json_value.cpp index d9dee50..a875d28 100644 --- a/src/lib_json/json_value.cpp +++ b/src/lib_json/json_value.cpp @@ -17,6 +17,10 @@ #include #include +#ifdef JSONCPP_HAS_STRING_VIEW +#include +#endif + // Provide implementation equivalent of std::snprintf for older _MSC compilers #if defined(_MSC_VER) && _MSC_VER < 1900 #include @@ -420,6 +424,14 @@ Value::Value(const String& value) { value.data(), static_cast(value.length())); } +#ifdef JSONCPP_HAS_STRING_VIEW +Value::Value(std::string_view value) { + initBasic(stringValue, true); + value_.string_ = duplicateAndPrefixStringValue( + value.data(), static_cast(value.length())); +} +#endif + Value::Value(const StaticString& value) { initBasic(stringValue); value_.string_ = const_cast(value.c_str()); @@ -627,6 +639,21 @@ bool Value::getString(char const** begin, char const** end) const { return true; } +#ifdef JSONCPP_HAS_STRING_VIEW +bool Value::getString(std::string_view* str) const { + if (type() != stringValue) + return false; + if (value_.string_ == nullptr) + return false; + const char* begin; + unsigned length; + decodePrefixedString(this->isAllocated(), this->value_.string_, &length, + &begin); + *str = std::string_view(begin, length); + return true; +} +#endif + String Value::asString() const { switch (type()) { case nullValue: @@ -1102,12 +1129,61 @@ Value const* Value::find(char const* begin, char const* end) const { Value const* Value::find(const String& key) const { return find(key.data(), key.data() + key.length()); } + +Value const* Value::findNull(const String& key) const { + return findValue(key); +} +Value const* Value::findBool(const String& key) const { + return findValue(key); +} +Value const* Value::findInt(const String& key) const { + return findValue(key); +} +Value const* Value::findInt64(const String& key) const { + return findValue(key); +} +Value const* Value::findUInt(const String& key) const { + return findValue(key); +} +Value const* Value::findUInt64(const String& key) const { + return findValue(key); +} +Value const* Value::findIntegral(const String& key) const { + return findValue(key); +} +Value const* Value::findDouble(const String& key) const { + return findValue(key); +} +Value const* Value::findNumeric(const String& key) const { + return findValue(key); +} +Value const* Value::findString(const String& key) const { + return findValue(key); +} +Value const* Value::findArray(const String& key) const { + return findValue(key); +} +Value const* Value::findObject(const String& key) const { + return findValue(key); +} + Value* Value::demand(char const* begin, char const* end) { JSON_ASSERT_MESSAGE(type() == nullValue || type() == objectValue, "in Json::Value::demand(begin, end): requires " "objectValue or nullValue"); return &resolveReference(begin, end); } +#ifdef JSONCPP_HAS_STRING_VIEW +const Value& Value::operator[](std::string_view key) const { + Value const* found = find(key.data(), key.data() + key.length()); + if (!found) + return nullSingleton(); + return *found; +} +Value& Value::operator[](std::string_view key) { + return resolveReference(key.data(), key.data() + key.length()); +} +#else const Value& Value::operator[](const char* key) const { Value const* found = find(key, key + strlen(key)); if (!found) @@ -1128,6 +1204,7 @@ Value& Value::operator[](const char* key) { Value& Value::operator[](const String& key) { return resolveReference(key.data(), key.data() + key.length()); } +#endif Value& Value::operator[](const StaticString& key) { return resolveReference(key.c_str()); @@ -1167,12 +1244,18 @@ Value Value::get(char const* begin, char const* end, Value const* found = find(begin, end); return !found ? defaultValue : *found; } +#ifdef JSONCPP_HAS_STRING_VIEW +Value Value::get(std::string_view key, const Value& defaultValue) const { + return get(key.data(), key.data() + key.length(), defaultValue); +} +#else Value Value::get(char const* key, Value const& defaultValue) const { return get(key, key + strlen(key), defaultValue); } Value Value::get(String const& key, Value const& defaultValue) const { return get(key.data(), key.data() + key.length(), defaultValue); } +#endif bool Value::removeMember(const char* begin, const char* end, Value* removed) { if (type() != objectValue) { @@ -1188,12 +1271,31 @@ bool Value::removeMember(const char* begin, const char* end, Value* removed) { value_.map_->erase(it); return true; } +#ifdef JSONCPP_HAS_STRING_VIEW +bool Value::removeMember(std::string_view key, Value* removed) { + return removeMember(key.data(), key.data() + key.length(), removed); +} +#else bool Value::removeMember(const char* key, Value* removed) { return removeMember(key, key + strlen(key), removed); } bool Value::removeMember(String const& key, Value* removed) { return removeMember(key.data(), key.data() + key.length(), removed); } +#endif + +#ifdef JSONCPP_HAS_STRING_VIEW +void Value::removeMember(std::string_view key) { + JSON_ASSERT_MESSAGE(type() == nullValue || type() == objectValue, + "in Json::Value::removeMember(): requires objectValue"); + if (type() == nullValue) + return; + + CZString actualKey(key.data(), unsigned(key.length()), + CZString::noDuplication); + value_.map_->erase(actualKey); +} +#else void Value::removeMember(const char* key) { JSON_ASSERT_MESSAGE(type() == nullValue || type() == objectValue, "in Json::Value::removeMember(): requires objectValue"); @@ -1204,6 +1306,7 @@ void Value::removeMember(const char* key) { value_.map_->erase(actualKey); } void Value::removeMember(const String& key) { removeMember(key.c_str()); } +#endif bool Value::removeIndex(ArrayIndex index, Value* removed) { if (type() != arrayValue) { @@ -1233,12 +1336,18 @@ bool Value::isMember(char const* begin, char const* end) const { Value const* value = find(begin, end); return nullptr != value; } +#ifdef JSONCPP_HAS_STRING_VIEW +bool Value::isMember(std::string_view key) const { + return isMember(key.data(), key.data() + key.length()); +} +#else bool Value::isMember(char const* key) const { return isMember(key, key + strlen(key)); } bool Value::isMember(String const& key) const { return isMember(key.data(), key.data() + key.length()); } +#endif Value::Members Value::getMemberNames() const { JSON_ASSERT_MESSAGE( diff --git a/src/test_lib_json/main.cpp b/src/test_lib_json/main.cpp index 5a0ce01..60f149d 100644 --- a/src/test_lib_json/main.cpp +++ b/src/test_lib_json/main.cpp @@ -76,6 +76,8 @@ struct ValueTest : JsonTest::TestCase { Json::Value float_{0.00390625f}; Json::Value array1_; Json::Value object1_; + Json::Value object2_; + Json::Value object3_; Json::Value emptyString_{""}; Json::Value string1_{"a"}; Json::Value string_{"sometext with space"}; @@ -85,6 +87,34 @@ struct ValueTest : JsonTest::TestCase { ValueTest() { array1_.append(1234); object1_["id"] = 1234; + + // object2 with matching values + object2_["null"] = Json::nullValue; + object2_["bool"] = true; + object2_["int"] = Json::Int{Json::Value::maxInt}; + object2_["int64"] = Json::Int64{Json::Value::maxInt64}; + object2_["uint"] = Json::UInt{Json::Value::maxUInt}; + object2_["uint64"] = Json::UInt64{Json::Value::maxUInt64}; + object2_["integral"] = 1234; + object2_["double"] = 1234.56789; + object2_["numeric"] = 0.12345f; + object2_["string"] = "string"; + object2_["array"] = Json::arrayValue; + object2_["object"] = Json::objectValue; + + // object3 with not matching values + object3_["object"] = Json::nullValue; + object3_["null"] = true; + object3_["bool"] = Json::Int{Json::Value::maxInt}; + object3_["int"] = "not_an_int"; + object3_["int64"] = "not_an_int64"; + object3_["uint"] = "not_an_uint"; + object3_["uin64"] = "not_an_uint64"; + object3_["integral"] = 1234.56789; + object3_["double"] = false; + object3_["numeric"] = "string"; + object3_["string"] = Json::arrayValue; + object3_["array"] = Json::objectValue; } struct IsCheck { @@ -234,6 +264,62 @@ JSONTEST_FIXTURE_LOCAL(ValueTest, objects) { const Json::Value* stringFoundUnknownId = object1_.find(stringUnknownIdKey); JSONTEST_ASSERT_EQUAL(nullptr, stringFoundUnknownId); + // Access through find() + const Json::Value* nullFound = object2_.findNull("null"); + JSONTEST_ASSERT(nullFound != nullptr); + JSONTEST_ASSERT_EQUAL(Json::nullValue, *nullFound); + JSONTEST_ASSERT(object3_.findNull("null") == nullptr); + + const Json::Value* boolFound = object2_.findBool("bool"); + JSONTEST_ASSERT(boolFound != nullptr); + JSONTEST_ASSERT_EQUAL(true, *boolFound); + JSONTEST_ASSERT(object3_.findBool("bool") == nullptr); + + const Json::Value* intFound = object2_.findInt("int"); + JSONTEST_ASSERT(intFound != nullptr); + JSONTEST_ASSERT_EQUAL(Json::Int{Json::Value::maxInt}, *intFound); + JSONTEST_ASSERT(object3_.findInt("int") == nullptr); + + const Json::Value* int64Found = object2_.findInt64("int64"); + JSONTEST_ASSERT(int64Found != nullptr); + JSONTEST_ASSERT_EQUAL(Json::Int64{Json::Value::maxInt64}, *int64Found); + JSONTEST_ASSERT(object3_.findInt64("int64") == nullptr); + + const Json::Value* uintFound = object2_.findUInt("uint"); + JSONTEST_ASSERT(uintFound != nullptr); + JSONTEST_ASSERT_EQUAL(Json::UInt{Json::Value::maxUInt}, *uintFound); + JSONTEST_ASSERT(object3_.findUInt("uint") == nullptr); + + const Json::Value* uint64Found = object2_.findUInt64("uint64"); + JSONTEST_ASSERT(uint64Found != nullptr); + JSONTEST_ASSERT_EQUAL(Json::UInt64{Json::Value::maxUInt64}, *uint64Found); + JSONTEST_ASSERT(object3_.findUInt64("uint64") == nullptr); + + const Json::Value* integralFound = object2_.findIntegral("integral"); + JSONTEST_ASSERT(integralFound != nullptr); + JSONTEST_ASSERT_EQUAL(1234, *integralFound); + JSONTEST_ASSERT(object3_.findIntegral("integral") == nullptr); + + const Json::Value* doubleFound = object2_.findDouble("double"); + JSONTEST_ASSERT(doubleFound != nullptr); + JSONTEST_ASSERT_EQUAL(1234.56789, *doubleFound); + JSONTEST_ASSERT(object3_.findDouble("double") == nullptr); + + const Json::Value* numericFound = object2_.findNumeric("numeric"); + JSONTEST_ASSERT(numericFound != nullptr); + JSONTEST_ASSERT_EQUAL(0.12345f, *numericFound); + JSONTEST_ASSERT(object3_.findNumeric("numeric") == nullptr); + + const Json::Value* stringFound = object2_.findString("string"); + JSONTEST_ASSERT(stringFound != nullptr); + JSONTEST_ASSERT_EQUAL(std::string{"string"}, *stringFound); + JSONTEST_ASSERT(object3_.findString("string") == nullptr); + + const Json::Value* arrayFound = object2_.findArray("array"); + JSONTEST_ASSERT(arrayFound != nullptr); + JSONTEST_ASSERT_EQUAL(Json::arrayValue, *arrayFound); + JSONTEST_ASSERT(object3_.findArray("array") == nullptr); + // Access through demand() const char yetAnotherIdKey[] = "yet another id"; const Json::Value* foundYetAnotherId =