/** * @file llinitparam.h * @brief parameter block abstraction for creating complex objects and * parsing construction parameters from xml and LLSD * * $LicenseInfo:firstyear=2008&license=viewerlgpl$ * Second Life Viewer Source Code * Copyright (C) 2010, Linden Research, Inc. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; * version 2.1 of the License only. * * This library 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA * * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA * $/LicenseInfo$ */ #ifndef LL_LLPARAM_H #define LL_LLPARAM_H #include <vector> #include <boost/function.hpp> #include <boost/type_traits/is_convertible.hpp> #include <boost/unordered_map.hpp> #include <boost/shared_ptr.hpp> #include "llerror.h" namespace LLInitParam { template<typename T> const T& defaultValue() { static T value; return value; } template <typename T, bool IS_BOOST_FUNCTION = boost::is_convertible<T, boost::function_base>::value > struct ParamCompare { static bool equals(const T &a, const T &b) { return a == b; } }; // boost function types are not comparable template<typename T> struct ParamCompare<T, true> { static bool equals(const T&a, const T &b) { return false; } }; template<> struct ParamCompare<LLSD, false> { static bool equals(const LLSD &a, const LLSD &b) { return false; } }; // helper functions and classes typedef ptrdiff_t param_handle_t; // empty default implementation of key cache // leverages empty base class optimization template <typename T> class TypeValues { public: typedef std::map<std::string, T> value_name_map_t; void setValueName(const std::string& key) {} std::string getValueName() const { return ""; } void clearValueName() const {} static bool getValueFromName(const std::string& name, T& value) { return false; } static bool valueNamesExist() { return false; } static std::vector<std::string>* getPossibleValues() { return NULL; } static value_name_map_t* getValueNames() {return NULL;} }; template <typename T, typename DERIVED_TYPE = TypeValues<T> > class TypeValuesHelper { public: typedef typename std::map<std::string, T> value_name_map_t; //TODO: cache key by index to save on param block size void setValueName(const std::string& value_name) { mValueName = value_name; } std::string getValueName() const { return mValueName; } void clearValueName() const { mValueName.clear(); } static bool getValueFromName(const std::string& name, T& value) { value_name_map_t* map = getValueNames(); typename value_name_map_t::iterator found_it = map->find(name); if (found_it == map->end()) return false; value = found_it->second; return true; } static bool valueNamesExist() { return !getValueNames()->empty(); } static value_name_map_t* getValueNames() { static value_name_map_t sMap; static bool sInitialized = false; if (!sInitialized) { sInitialized = true; DERIVED_TYPE::declareValues(); } return &sMap; } static std::vector<std::string>* getPossibleValues() { static std::vector<std::string> sValues; value_name_map_t* map = getValueNames(); for (typename value_name_map_t::iterator it = map->begin(), end_it = map->end(); it != end_it; ++it) { sValues.push_back(it->first); } return &sValues; } static void declare(const std::string& name, const T& value) { (*getValueNames())[name] = value; } protected: static void getName(const std::string& name, const T& value) {} mutable std::string mValueName; }; class Parser { LOG_CLASS(Parser); public: struct CompareTypeID { bool operator()(const std::type_info* lhs, const std::type_info* rhs) const { return lhs->before(*rhs); } }; typedef std::vector<std::pair<std::string, S32> > name_stack_t; typedef std::pair<name_stack_t::const_iterator, name_stack_t::const_iterator> name_stack_range_t; typedef std::vector<std::string> possible_values_t; typedef bool (*parser_read_func_t)(Parser& parser, void* output); typedef bool (*parser_write_func_t)(Parser& parser, const void*, const name_stack_t&); typedef boost::function<void (const name_stack_t&, S32, S32, const possible_values_t*)> parser_inspect_func_t; typedef std::map<const std::type_info*, parser_read_func_t, CompareTypeID> parser_read_func_map_t; typedef std::map<const std::type_info*, parser_write_func_t, CompareTypeID> parser_write_func_map_t; typedef std::map<const std::type_info*, parser_inspect_func_t, CompareTypeID> parser_inspect_func_map_t; Parser(parser_read_func_map_t& read_map, parser_write_func_map_t& write_map, parser_inspect_func_map_t& inspect_map) : mParseSilently(false), mParseGeneration(sNextParseGeneration), mParserReadFuncs(&read_map), mParserWriteFuncs(&write_map), mParserInspectFuncs(&inspect_map) {} virtual ~Parser(); template <typename T> bool readValue(T& param) { parser_read_func_map_t::iterator found_it = mParserReadFuncs->find(&typeid(T)); if (found_it != mParserReadFuncs->end()) { return found_it->second(*this, (void*)¶m); } return false; } template <typename T> bool writeValue(const T& param, const name_stack_t& name_stack) { parser_write_func_map_t::iterator found_it = mParserWriteFuncs->find(&typeid(T)); if (found_it != mParserWriteFuncs->end()) { return found_it->second(*this, (const void*)¶m, name_stack); } return false; } // dispatch inspection to registered inspection functions, for each parameter in a param block template <typename T> bool inspectValue(const name_stack_t& name_stack, S32 min_count, S32 max_count, const possible_values_t* possible_values) { parser_inspect_func_map_t::iterator found_it = mParserInspectFuncs->find(&typeid(T)); if (found_it != mParserInspectFuncs->end()) { found_it->second(name_stack, min_count, max_count, possible_values); return true; } return false; } virtual std::string getCurrentElementName() = 0; virtual void parserWarning(const std::string& message); virtual void parserError(const std::string& message); void setParseSilently(bool silent) { mParseSilently = silent; } S32 getParseGeneration() { return mParseGeneration; } S32 newParseGeneration() { return mParseGeneration = ++sNextParseGeneration; } protected: template <typename T> void registerParserFuncs(parser_read_func_t read_func, parser_write_func_t write_func = NULL) { mParserReadFuncs->insert(std::make_pair(&typeid(T), read_func)); mParserWriteFuncs->insert(std::make_pair(&typeid(T), write_func)); } template <typename T> void registerInspectFunc(parser_inspect_func_t inspect_func) { mParserInspectFuncs->insert(std::make_pair(&typeid(T), inspect_func)); } bool mParseSilently; private: parser_read_func_map_t* mParserReadFuncs; parser_write_func_map_t* mParserWriteFuncs; parser_inspect_func_map_t* mParserInspectFuncs; S32 mParseGeneration; static S32 sNextParseGeneration; }; // used to indicate no matching value to a given name when parsing struct NoParamValue{}; class BaseBlock; class Param { public: // public to allow choice blocks to clear provided flag on stale choices void setProvided(bool is_provided) { mIsProvided = is_provided; } protected: bool anyProvided() const { return mIsProvided; } Param(class BaseBlock* enclosing_block); // store pointer to enclosing block as offset to reduce space and allow for quick copying class BaseBlock& enclosingBlock() const { const U8* my_addr = reinterpret_cast<const U8*>(this); // get address of enclosing BLOCK class using stored offset to enclosing BaseBlock class return *const_cast<class BaseBlock*> (reinterpret_cast<const class BaseBlock*> (my_addr - (ptrdiff_t)(S32)mEnclosingBlockOffset)); } private: friend class BaseBlock; U32 mEnclosingBlockOffset:31; U32 mIsProvided:1; }; // various callbacks and constraints associated with an individual param struct ParamDescriptor { struct UserData { virtual ~UserData() {} }; typedef bool(*merge_func_t)(Param&, const Param&, bool); typedef bool(*deserialize_func_t)(Param&, Parser&, const Parser::name_stack_range_t&, S32); typedef void(*serialize_func_t)(const Param&, Parser&, Parser::name_stack_t&, const Param* diff_param); typedef void(*inspect_func_t)(const Param&, Parser&, Parser::name_stack_t&, S32 min_count, S32 max_count); typedef bool(*validation_func_t)(const Param*); ParamDescriptor(param_handle_t p, merge_func_t merge_func, deserialize_func_t deserialize_func, serialize_func_t serialize_func, validation_func_t validation_func, inspect_func_t inspect_func, S32 min_count, S32 max_count); ParamDescriptor(); ~ParamDescriptor(); param_handle_t mParamHandle; merge_func_t mMergeFunc; deserialize_func_t mDeserializeFunc; serialize_func_t mSerializeFunc; inspect_func_t mInspectFunc; validation_func_t mValidationFunc; S32 mMinCount; S32 mMaxCount; S32 mGeneration; S32 mNumRefs; UserData* mUserData; }; typedef boost::shared_ptr<ParamDescriptor> ParamDescriptorPtr; // each derived Block class keeps a static data structure maintaining offsets to various params class BlockDescriptor { public: BlockDescriptor(); typedef enum e_initialization_state { UNINITIALIZED, INITIALIZING, INITIALIZED } EInitializationState; void aggregateBlockData(BlockDescriptor& src_block_data); typedef boost::unordered_map<const std::string, ParamDescriptorPtr> param_map_t; typedef std::vector<ParamDescriptorPtr> param_list_t; typedef std::list<ParamDescriptorPtr> all_params_list_t; typedef std::vector<std::pair<param_handle_t, ParamDescriptor::validation_func_t> > param_validation_list_t; param_map_t mNamedParams; // parameters with associated names param_list_t mUnnamedParams; // parameters with_out_ associated names param_validation_list_t mValidationList; // parameters that must be validated all_params_list_t mAllParams; // all parameters, owns descriptors size_t mMaxParamOffset; EInitializationState mInitializationState; // whether or not static block data has been initialized class BaseBlock* mCurrentBlockPtr; // pointer to block currently being constructed }; class BaseBlock { public: // "Multiple" constraint types, put here in root class to avoid ambiguity during use struct AnyAmount { static U32 minCount() { return 0; } static U32 maxCount() { return U32_MAX; } }; template<U32 MIN_AMOUNT> struct AtLeast { static U32 minCount() { return MIN_AMOUNT; } static U32 maxCount() { return U32_MAX; } }; template<U32 MAX_AMOUNT> struct AtMost { static U32 minCount() { return 0; } static U32 maxCount() { return MAX_AMOUNT; } }; template<U32 MIN_AMOUNT, U32 MAX_AMOUNT> struct Between { static U32 minCount() { return MIN_AMOUNT; } static U32 maxCount() { return MAX_AMOUNT; } }; template<U32 EXACT_COUNT> struct Exactly { static U32 minCount() { return EXACT_COUNT; } static U32 maxCount() { return EXACT_COUNT; } }; // this typedef identifies derived classes as being blocks typedef void baseblock_base_class_t; LOG_CLASS(BaseBlock); friend class Param; BaseBlock(); virtual ~BaseBlock(); bool submitValue(const Parser::name_stack_t& name_stack, Parser& p, bool silent=false); param_handle_t getHandleFromParam(const Param* param) const; bool validateBlock(bool emit_errors = true) const; Param* getParamFromHandle(const param_handle_t param_handle) { if (param_handle == 0) return NULL; U8* baseblock_address = reinterpret_cast<U8*>(this); return reinterpret_cast<Param*>(baseblock_address + param_handle); } const Param* getParamFromHandle(const param_handle_t param_handle) const { const U8* baseblock_address = reinterpret_cast<const U8*>(this); return reinterpret_cast<const Param*>(baseblock_address + param_handle); } void addSynonym(Param& param, const std::string& synonym); // Blocks can override this to do custom tracking of changes virtual void paramChanged(const Param& changed_param, bool user_provided); S32 getLastChangeVersion() const { return mChangeVersion; } bool deserializeBlock(Parser& p, Parser::name_stack_range_t name_stack, S32 generation); void serializeBlock(Parser& p, Parser::name_stack_t name_stack = Parser::name_stack_t(), const BaseBlock* diff_block = NULL) const; bool inspectBlock(Parser& p, Parser::name_stack_t name_stack = Parser::name_stack_t(), S32 min_count = 0, S32 max_count = S32_MAX) const; virtual const BlockDescriptor& mostDerivedBlockDescriptor() const { return selfBlockDescriptor(); } virtual BlockDescriptor& mostDerivedBlockDescriptor() { return selfBlockDescriptor(); } // take all provided params from other and apply to self bool overwriteFrom(const BaseBlock& other) { return false; } // take all provided params that are not already provided, and apply to self bool fillFrom(const BaseBlock& other) { return false; } static void addParam(BlockDescriptor& block_data, ParamDescriptorPtr param, const char* name); ParamDescriptorPtr findParamDescriptor(const Param& param); protected: void init(BlockDescriptor& descriptor, BlockDescriptor& base_descriptor, size_t block_size); bool mergeBlockParam(bool param_provided, BlockDescriptor& block_data, const BaseBlock& other, bool overwrite) { return mergeBlock(block_data, other, overwrite); } // take all provided params from other and apply to self bool mergeBlock(BlockDescriptor& block_data, const BaseBlock& other, bool overwrite); // can be updated in getters mutable S32 mChangeVersion; static BlockDescriptor& selfBlockDescriptor() { static BlockDescriptor sBlockDescriptor; return sBlockDescriptor; } private: const std::string& getParamName(const BlockDescriptor& block_data, const Param* paramp) const; }; // these templates allow us to distinguish between template parameters // that derive from BaseBlock and those that don't template<typename T, typename Void = void> struct IsBlock { static const bool value = false; }; template<typename T> struct IsBlock<T, typename T::baseblock_base_class_t> { static const bool value = true; }; template<typename T, typename NAME_VALUE_LOOKUP, bool VALUE_IS_BLOCK = IsBlock<T>::value> class ParamValue : public NAME_VALUE_LOOKUP { public: typedef const T& value_assignment_t; ParamValue(): mValue() {} ParamValue(const T& other) : mValue(other) {} void setValue(value_assignment_t val) { mValue = val; } value_assignment_t getValue() const { return mValue; } T& getValue() { return mValue; } private: T mValue; }; template<typename T, typename NAME_VALUE_LOOKUP> class ParamValue<T, NAME_VALUE_LOOKUP, true> : public T, public NAME_VALUE_LOOKUP { public: typedef const T& value_assignment_t; S32 mKeyVersion; mutable S32 mValidatedVersion; mutable bool mValidated; // lazy validation flag ParamValue() : T(), mKeyVersion(0), mValidatedVersion(-1), mValidated(false) {} ParamValue(const T& other) : T(other), mKeyVersion(0), mValidatedVersion(-1), mValidated(false) { } void setValue(value_assignment_t val) { *this = val; } value_assignment_t getValue() const { return *this; } T& getValue() { return *this; } }; template<typename T, typename NAME_VALUE_LOOKUP = TypeValues<T> > struct ParamIterator { typedef typename std::vector<ParamValue<T, NAME_VALUE_LOOKUP> >::const_iterator const_iterator; typedef typename std::vector<ParamValue<T, NAME_VALUE_LOOKUP> >::iterator iterator; }; // specialize for custom parsing/decomposition of specific classes // e.g. TypedParam<LLRect> has left, top, right, bottom, etc... template<typename T, typename NAME_VALUE_LOOKUP = TypeValues<T>, bool HAS_MULTIPLE_VALUES = false, bool VALUE_IS_BLOCK = IsBlock<ParamValue<T, NAME_VALUE_LOOKUP> >::value> class TypedParam : public Param, public ParamValue<T, NAME_VALUE_LOOKUP> { public: typedef const T& value_assignment_t; typedef TypedParam<T, NAME_VALUE_LOOKUP, HAS_MULTIPLE_VALUES, VALUE_IS_BLOCK> self_t; typedef NAME_VALUE_LOOKUP name_value_lookup_t; typedef ParamValue<T, NAME_VALUE_LOOKUP> param_value_t; TypedParam(BlockDescriptor& block_descriptor, const char* name, value_assignment_t value, ParamDescriptor::validation_func_t validate_func, S32 min_count, S32 max_count) : Param(block_descriptor.mCurrentBlockPtr) { if (LL_UNLIKELY(block_descriptor.mInitializationState == BlockDescriptor::INITIALIZING)) { ParamDescriptorPtr param_descriptor = ParamDescriptorPtr(new ParamDescriptor( block_descriptor.mCurrentBlockPtr->getHandleFromParam(this), &mergeWith, &deserializeParam, &serializeParam, validate_func, &inspectParam, min_count, max_count)); BaseBlock::addParam(block_descriptor, param_descriptor, name); } setValue(value); } bool isProvided() const { return Param::anyProvided(); } static bool deserializeParam(Param& param, Parser& parser, const Parser::name_stack_range_t& name_stack, S32 generation) { self_t& typed_param = static_cast<self_t&>(param); // no further names in stack, attempt to parse value now if (name_stack.first == name_stack.second) { if (parser.readValue(typed_param.getValue())) { typed_param.clearValueName(); typed_param.setProvided(true); typed_param.enclosingBlock().paramChanged(param, true); return true; } // try to parse a known named value if(name_value_lookup_t::valueNamesExist()) { // try to parse a known named value std::string name; if (parser.readValue(name)) { // try to parse a per type named value if (name_value_lookup_t::getValueFromName(name, typed_param.getValue())) { typed_param.setValueName(name); typed_param.setProvided(true); typed_param.enclosingBlock().paramChanged(param, true); return true; } } } } return false; } static void serializeParam(const Param& param, Parser& parser, Parser::name_stack_t& name_stack, const Param* diff_param) { const self_t& typed_param = static_cast<const self_t&>(param); if (!typed_param.isProvided()) return; if (!name_stack.empty()) { name_stack.back().second = parser.newParseGeneration(); } std::string key = typed_param.getValueName(); // first try to write out name of name/value pair if (!key.empty()) { if (!diff_param || !ParamCompare<std::string>::equals(static_cast<const self_t*>(diff_param)->getValueName(), key)) { if (!parser.writeValue(key, name_stack)) { return; } } } // then try to serialize value directly else if (!diff_param || !ParamCompare<T>::equals(typed_param.getValue(), static_cast<const self_t*>(diff_param)->getValue())) { if (!parser.writeValue(typed_param.getValue(), name_stack)) { return; } } } static void inspectParam(const Param& param, Parser& parser, Parser::name_stack_t& name_stack, S32 min_count, S32 max_count) { // tell parser about our actual type parser.inspectValue<T>(name_stack, min_count, max_count, NULL); // then tell it about string-based alternatives ("red", "blue", etc. for LLColor4) if (name_value_lookup_t::getPossibleValues()) { parser.inspectValue<std::string>(name_stack, min_count, max_count, name_value_lookup_t::getPossibleValues()); } } void set(value_assignment_t val, bool flag_as_provided = true) { setValue(val); param_value_t::clearValueName(); setProvided(flag_as_provided); Param::enclosingBlock().paramChanged(*this, flag_as_provided); } void setIfNotProvided(value_assignment_t val, bool flag_as_provided = true) { if (!isProvided()) { set(val, flag_as_provided); } } // implicit conversion operator value_assignment_t() const { return param_value_t::getValue(); } // explicit conversion value_assignment_t operator()() const { return param_value_t::getValue(); } protected: static bool mergeWith(Param& dst, const Param& src, bool overwrite) { const self_t& src_typed_param = static_cast<const self_t&>(src); self_t& dst_typed_param = static_cast<self_t&>(dst); if (src_typed_param.isProvided() && (overwrite || !dst_typed_param.isProvided())) { dst_typed_param.set(src_typed_param.getValue()); return true; } return false; } }; // parameter that is a block template <typename T, typename NAME_VALUE_LOOKUP> class TypedParam<T, NAME_VALUE_LOOKUP, false, true> : public Param, public ParamValue<T, NAME_VALUE_LOOKUP> { public: typedef const T value_const_t; typedef T value_t; typedef value_const_t& value_assignment_t; typedef TypedParam<T, NAME_VALUE_LOOKUP, false, true> self_t; typedef NAME_VALUE_LOOKUP name_value_lookup_t; typedef ParamValue<T, NAME_VALUE_LOOKUP> param_value_t; TypedParam(BlockDescriptor& block_descriptor, const char* name, value_assignment_t value, ParamDescriptor::validation_func_t validate_func, S32 min_count, S32 max_count) : Param(block_descriptor.mCurrentBlockPtr), param_value_t(value) { if (LL_UNLIKELY(block_descriptor.mInitializationState == BlockDescriptor::INITIALIZING)) { ParamDescriptorPtr param_descriptor = ParamDescriptorPtr(new ParamDescriptor( block_descriptor.mCurrentBlockPtr->getHandleFromParam(this), &mergeWith, &deserializeParam, &serializeParam, validate_func, &inspectParam, min_count, max_count)); BaseBlock::addParam(block_descriptor, param_descriptor, name); } } static bool deserializeParam(Param& param, Parser& parser, const Parser::name_stack_range_t& name_stack, S32 generation) { self_t& typed_param = static_cast<self_t&>(param); // attempt to parse block... if(typed_param.deserializeBlock(parser, name_stack, generation)) { typed_param.clearValueName(); typed_param.enclosingBlock().paramChanged(param, true); typed_param.setProvided(true); return true; } if(name_value_lookup_t::valueNamesExist()) { // try to parse a known named value std::string name; if (parser.readValue(name)) { // try to parse a per type named value if (name_value_lookup_t::getValueFromName(name, typed_param.getValue())) { typed_param.enclosingBlock().paramChanged(param, true); typed_param.setValueName(name); typed_param.setProvided(true); typed_param.mKeyVersion = typed_param.getLastChangeVersion(); return true; } } } return false; } static void serializeParam(const Param& param, Parser& parser, Parser::name_stack_t& name_stack, const Param* diff_param) { const self_t& typed_param = static_cast<const self_t&>(param); if (!typed_param.isProvided()) return; if (!name_stack.empty()) { name_stack.back().second = parser.newParseGeneration(); } std::string key = typed_param.getValueName(); if (!key.empty() && typed_param.mKeyVersion == typed_param.getLastChangeVersion()) { if (!parser.writeValue(key, name_stack)) { return; } } else { typed_param.serializeBlock(parser, name_stack, static_cast<const self_t*>(diff_param)); } } static void inspectParam(const Param& param, Parser& parser, Parser::name_stack_t& name_stack, S32 min_count, S32 max_count) { // I am a param that is also a block, so just recurse into my contents const self_t& typed_param = static_cast<const self_t&>(param); typed_param.inspectBlock(parser, name_stack, min_count, max_count); } // a param-that-is-a-block is provided when the user has set one of its child params // *and* the block as a whole validates bool isProvided() const { // only validate block when it hasn't already passed validation with current data if (Param::anyProvided() && param_value_t::mValidatedVersion < param_value_t::getLastChangeVersion()) { // a sub-block is "provided" when it has been filled in enough to be valid param_value_t::mValidated = param_value_t::validateBlock(false); param_value_t::mValidatedVersion = param_value_t::getLastChangeVersion(); } return Param::anyProvided() && param_value_t::mValidated; } // assign block contents to this param-that-is-a-block void set(value_assignment_t val, bool flag_as_provided = true) { setValue(val); param_value_t::clearValueName(); // force revalidation of block by clearing known provided version // next call to isProvided() will update provision status based on validity param_value_t::mValidatedVersion = -1; setProvided(flag_as_provided); Param::enclosingBlock().paramChanged(*this, flag_as_provided); } void setIfNotProvided(value_assignment_t val, bool flag_as_provided = true) { if (!isProvided()) { set(val, flag_as_provided); } } // propagate changed status up to enclosing block /*virtual*/ void paramChanged(const Param& changed_param, bool user_provided) { ParamValue<T, NAME_VALUE_LOOKUP>::paramChanged(changed_param, user_provided); Param::enclosingBlock().paramChanged(*this, user_provided); if (user_provided) { // a child param has been explicitly changed // so *some* aspect of this block is now provided setProvided(true); } } // implicit conversion operator value_assignment_t() const { return param_value_t::getValue(); } // explicit conversion value_assignment_t operator()() const { return param_value_t::getValue(); } protected: static bool mergeWith(Param& dst, const Param& src, bool overwrite) { const self_t& src_typed_param = static_cast<const self_t&>(src); self_t& dst_typed_param = static_cast<self_t&>(dst); if (src_typed_param.anyProvided()) { bool param_provided = src_typed_param.isProvided() && (overwrite || !dst_typed_param.isProvided()); if (dst_typed_param.mergeBlockParam(param_provided, param_value_t::selfBlockDescriptor(), src_typed_param, overwrite)) { dst_typed_param.clearValueName(); dst_typed_param.setProvided(true); dst_typed_param.enclosingBlock().paramChanged(dst_typed_param, true); return true; } } return false; } }; // container of non-block parameters template <typename VALUE_TYPE, typename NAME_VALUE_LOOKUP> class TypedParam<VALUE_TYPE, NAME_VALUE_LOOKUP, true, false> : public Param { public: typedef TypedParam<VALUE_TYPE, NAME_VALUE_LOOKUP, true, false> self_t; typedef ParamValue<VALUE_TYPE, NAME_VALUE_LOOKUP> param_value_t; typedef typename std::vector<param_value_t> container_t; typedef const container_t& value_assignment_t; typedef VALUE_TYPE value_t; typedef NAME_VALUE_LOOKUP name_value_lookup_t; TypedParam(BlockDescriptor& block_descriptor, const char* name, value_assignment_t value, ParamDescriptor::validation_func_t validate_func, S32 min_count, S32 max_count) : Param(block_descriptor.mCurrentBlockPtr) { std::copy(value.begin(), value.end(), std::back_inserter(mValues)); if (LL_UNLIKELY(block_descriptor.mInitializationState == BlockDescriptor::INITIALIZING)) { ParamDescriptorPtr param_descriptor = ParamDescriptorPtr(new ParamDescriptor( block_descriptor.mCurrentBlockPtr->getHandleFromParam(this), &mergeWith, &deserializeParam, &serializeParam, validate_func, &inspectParam, min_count, max_count)); BaseBlock::addParam(block_descriptor, param_descriptor, name); } } bool isProvided() const { return Param::anyProvided(); } static bool deserializeParam(Param& param, Parser& parser, const Parser::name_stack_range_t& name_stack, S32 generation) { self_t& typed_param = static_cast<self_t&>(param); value_t value; // no further names in stack, attempt to parse value now if (name_stack.first == name_stack.second) { // attempt to read value directly if (parser.readValue(value)) { typed_param.add(value); return true; } // try to parse a known named value if(name_value_lookup_t::valueNamesExist()) { // try to parse a known named value std::string name; if (parser.readValue(name)) { // try to parse a per type named value if (name_value_lookup_t::getValueFromName(name, typed_param.mValues)) { typed_param.add(value); typed_param.mValues.back().setValueName(name); return true; } } } } return false; } static void serializeParam(const Param& param, Parser& parser, Parser::name_stack_t& name_stack, const Param* diff_param) { const self_t& typed_param = static_cast<const self_t&>(param); if (!typed_param.isProvided() || name_stack.empty()) return; for (const_iterator it = typed_param.mValues.begin(), end_it = typed_param.mValues.end(); it != end_it; ++it) { std::string key = it->getValue(); name_stack.back().second = parser.newParseGeneration(); if(key.empty()) // not parsed via name values, write out value directly { if (!parser.writeValue(*it, name_stack)) { break; } } else { if(!parser.writeValue(key, name_stack)) { break; } } } } static void inspectParam(const Param& param, Parser& parser, Parser::name_stack_t& name_stack, S32 min_count, S32 max_count) { parser.inspectValue<VALUE_TYPE>(name_stack, min_count, max_count, NULL); if (name_value_lookup_t::getPossibleValues()) { parser.inspectValue<std::string>(name_stack, min_count, max_count, name_value_lookup_t::getPossibleValues()); } } void set(value_assignment_t val, bool flag_as_provided = true) { mValues = val; setProvided(flag_as_provided); Param::enclosingBlock().paramChanged(*this, flag_as_provided); } void setIfNotProvided(value_assignment_t val, bool flag_as_provided = true) { if (!isProvided()) { set(val, flag_as_provided); } } value_t& add() { mValues.push_back(param_value_t(value_t())); setProvided(true); Param::enclosingBlock().paramChanged(*this, true); return mValues.back(); } void add(const value_t& item) { mValues.push_back(param_value_t(item)); setProvided(true); Param::enclosingBlock().paramChanged(*this, true); } // implicit conversion operator value_assignment_t() const { return mValues; } typedef typename container_t::iterator iterator; typedef typename container_t::const_iterator const_iterator; iterator begin() { return mValues.begin(); } iterator end() { return mValues.end(); } const_iterator begin() const { return mValues.begin(); } const_iterator end() const { return mValues.end(); } bool empty() const { return mValues.empty(); } size_t size() const { return mValues.size(); } U32 numValidElements() const { return mValues.size(); } protected: static bool mergeWith(Param& dst, const Param& src, bool overwrite) { const self_t& src_typed_param = static_cast<const self_t&>(src); self_t& dst_typed_param = static_cast<self_t&>(dst); if (overwrite) { std::copy(src_typed_param.begin(), src_typed_param.end(), std::back_inserter(dst_typed_param.mValues)); } else { container_t new_values(src_typed_param.mValues); std::copy(dst_typed_param.begin(), dst_typed_param.end(), std::back_inserter(new_values)); std::swap(dst_typed_param.mValues, new_values); } if (src_typed_param.begin() != src_typed_param.end()) { dst_typed_param.setProvided(true); dst_typed_param.enclosingBlock().paramChanged(dst_typed_param, true); } return true; } container_t mValues; }; // container of block parameters template <typename VALUE_TYPE, typename NAME_VALUE_LOOKUP> class TypedParam<VALUE_TYPE, NAME_VALUE_LOOKUP, true, true> : public Param { public: typedef TypedParam<VALUE_TYPE, NAME_VALUE_LOOKUP, true, true> self_t; typedef ParamValue<VALUE_TYPE, NAME_VALUE_LOOKUP> param_value_t; typedef typename std::vector<param_value_t> container_t; typedef const container_t& value_assignment_t; typedef VALUE_TYPE value_t; typedef NAME_VALUE_LOOKUP name_value_lookup_t; TypedParam(BlockDescriptor& block_descriptor, const char* name, value_assignment_t value, ParamDescriptor::validation_func_t validate_func, S32 min_count, S32 max_count) : Param(block_descriptor.mCurrentBlockPtr), mLastParseGeneration(0) { std::copy(value.begin(), value.end(), back_inserter(mValues)); if (LL_UNLIKELY(block_descriptor.mInitializationState == BlockDescriptor::INITIALIZING)) { ParamDescriptorPtr param_descriptor = ParamDescriptorPtr(new ParamDescriptor( block_descriptor.mCurrentBlockPtr->getHandleFromParam(this), &mergeWith, &deserializeParam, &serializeParam, validate_func, &inspectParam, min_count, max_count)); BaseBlock::addParam(block_descriptor, param_descriptor, name); } } bool isProvided() const { return Param::anyProvided(); } static bool deserializeParam(Param& param, Parser& parser, const Parser::name_stack_range_t& name_stack, S32 generation) { self_t& typed_param = static_cast<self_t&>(param); bool new_value = false; if (generation != typed_param.mLastParseGeneration || typed_param.mValues.empty()) { new_value = true; typed_param.mValues.push_back(value_t()); } param_value_t& value = typed_param.mValues.back(); // attempt to parse block... if(value.deserializeBlock(parser, name_stack, generation)) { if (new_value) { // successfully parsed new value, let's keep it typed_param.mLastParseGeneration = generation; } typed_param.enclosingBlock().paramChanged(param, true); typed_param.setProvided(true); return true; } else if(name_value_lookup_t::valueNamesExist()) { // try to parse a known named value std::string name; if (parser.readValue(name)) { // try to parse a per type named value if (name_value_lookup_t::getValueFromName(name, value.getValue())) { if (new_value) { // successfully parsed new value, let's keep it typed_param.mLastParseGeneration = generation; } typed_param.mValues.back().setValueName(name); typed_param.mValues.back().mKeyVersion = value.getLastChangeVersion(); typed_param.enclosingBlock().paramChanged(param, true); typed_param.setProvided(true); return true; } } } if (new_value) { // failed to parse new value, pop it off typed_param.mValues.pop_back(); } return false; } static void serializeParam(const Param& param, Parser& parser, Parser::name_stack_t& name_stack, const Param* diff_param) { const self_t& typed_param = static_cast<const self_t&>(param); if (!typed_param.isProvided() || name_stack.empty()) return; for (const_iterator it = typed_param.mValues.begin(), end_it = typed_param.mValues.end(); it != end_it; ++it) { name_stack.back().second = parser.newParseGeneration(); std::string key = it->getValueName(); if (!key.empty() && it->mKeyVersion == it->getLastChangeVersion()) { parser.writeValue(key, name_stack); } // Not parsed via named values, write out value directly // NOTE: currently we don't worry about removing default values in Multiple else { it->serializeBlock(parser, name_stack, NULL); } } } static void inspectParam(const Param& param, Parser& parser, Parser::name_stack_t& name_stack, S32 min_count, S32 max_count) { // I am a vector of blocks, so describe my contents recursively param_value_t(value_t()).inspectBlock(parser, name_stack, min_count, max_count); } void set(value_assignment_t val, bool flag_as_provided = true) { mValues = val; setProvided(flag_as_provided); Param::enclosingBlock().paramChanged(*this, flag_as_provided); } void setIfNotProvided(value_assignment_t val, bool flag_as_provided = true) { if (!isProvided()) { set(val, flag_as_provided); } } value_t& add() { mValues.push_back(value_t()); setProvided(true); Param::enclosingBlock().paramChanged(*this, true); return mValues.back(); } void add(const value_t& item) { mValues.push_back(item); setProvided(true); Param::enclosingBlock().paramChanged(*this, true); } // implicit conversion operator value_assignment_t() const { return mValues; } typedef typename container_t::iterator iterator; typedef typename container_t::const_iterator const_iterator; iterator begin() { return mValues.begin(); } iterator end() { return mValues.end(); } const_iterator begin() const { return mValues.begin(); } const_iterator end() const { return mValues.end(); } bool empty() const { return mValues.empty(); } size_t size() const { return mValues.size(); } U32 numValidElements() const { U32 count = 0; for (const_iterator it = mValues.begin(), end_it = mValues.end(); it != end_it; ++it) { if(it->validateBlock(false)) count++; } return count; } protected: static bool mergeWith(Param& dst, const Param& src, bool overwrite) { const self_t& src_typed_param = static_cast<const self_t&>(src); self_t& dst_typed_param = static_cast<self_t&>(dst); if (overwrite) { std::copy(src_typed_param.begin(), src_typed_param.end(), std::back_inserter(dst_typed_param.mValues)); } else { container_t new_values(src_typed_param.mValues); std::copy(dst_typed_param.begin(), dst_typed_param.end(), std::back_inserter(new_values)); std::swap(dst_typed_param.mValues, new_values); } if (src_typed_param.begin() != src_typed_param.end()) { dst_typed_param.setProvided(true); dst_typed_param.enclosingBlock().paramChanged(dst_typed_param, true); } return true; } container_t mValues; S32 mLastParseGeneration; }; template <typename DERIVED_BLOCK> class Choice : public BaseBlock { typedef Choice<DERIVED_BLOCK> self_t; typedef Choice<DERIVED_BLOCK> enclosing_block_t; LOG_CLASS(self_t); public: // take all provided params from other and apply to self bool overwriteFrom(const self_t& other) { return mergeBlock(selfBlockDescriptor(), other, true); } // take all provided params that are not already provided, and apply to self bool fillFrom(const self_t& other) { return mergeBlock(selfBlockDescriptor(), other, false); } bool mergeBlockParam(bool param_provided, BlockDescriptor& block_data, const self_t& other, bool overwrite) { if (param_provided) { return mergeBlock(block_data, other, overwrite); } return false; } // merge with other block bool mergeBlock(BlockDescriptor& block_data, const self_t& other, bool overwrite) { mCurChoice = other.mCurChoice; return BaseBlock::mergeBlock(selfBlockDescriptor(), other, overwrite); } // clear out old choice when param has changed /*virtual*/ void paramChanged(const Param& changed_param, bool user_provided) { param_handle_t changed_param_handle = BaseBlock::getHandleFromParam(&changed_param); // if we have a new choice... if (changed_param_handle != mCurChoice) { // clear provided flag on previous choice Param* previous_choice = BaseBlock::getParamFromHandle(mCurChoice); if (previous_choice) { previous_choice->setProvided(false); } mCurChoice = changed_param_handle; } BaseBlock::paramChanged(changed_param, user_provided); } virtual const BlockDescriptor& mostDerivedBlockDescriptor() const { return selfBlockDescriptor(); } virtual BlockDescriptor& mostDerivedBlockDescriptor() { return selfBlockDescriptor(); } protected: Choice() : mCurChoice(0) { BaseBlock::init(selfBlockDescriptor(), BaseBlock::selfBlockDescriptor(), sizeof(DERIVED_BLOCK)); } // Alternatives are mutually exclusive wrt other Alternatives in the same block. // One alternative in a block will always have isChosen() == true. // At most one alternative in a block will have isProvided() == true. template <typename T, typename NAME_VALUE_LOOKUP = TypeValues<T> > class Alternative : public TypedParam<T, NAME_VALUE_LOOKUP, false> { public: friend class Choice<DERIVED_BLOCK>; typedef Alternative<T, NAME_VALUE_LOOKUP> self_t; typedef TypedParam<T, NAME_VALUE_LOOKUP, false, IsBlock<ParamValue<T, NAME_VALUE_LOOKUP> >::value> super_t; typedef typename super_t::value_assignment_t value_assignment_t; explicit Alternative(const char* name, value_assignment_t val = defaultValue<T>()) : super_t(DERIVED_BLOCK::selfBlockDescriptor(), name, val, NULL, 0, 1), mOriginalValue(val) { // assign initial choice to first declared option DERIVED_BLOCK* blockp = ((DERIVED_BLOCK*)DERIVED_BLOCK::selfBlockDescriptor().mCurrentBlockPtr); if (LL_UNLIKELY(DERIVED_BLOCK::selfBlockDescriptor().mInitializationState == BlockDescriptor::INITIALIZING)) { if(blockp->mCurChoice == 0) { blockp->mCurChoice = Param::enclosingBlock().getHandleFromParam(this); } } } Alternative& operator=(value_assignment_t val) { super_t::set(val); return *this; } void operator()(typename super_t::value_assignment_t val) { super_t::set(val); } operator value_assignment_t() const { if (static_cast<enclosing_block_t&>(Param::enclosingBlock()).getCurrentChoice() == this) { return super_t::getValue(); } return mOriginalValue; } value_assignment_t operator()() const { if (static_cast<enclosing_block_t&>(Param::enclosingBlock()).getCurrentChoice() == this) { return super_t::getValue(); } return mOriginalValue; } bool isChosen() const { return static_cast<enclosing_block_t&>(Param::enclosingBlock()).getCurrentChoice() == this; } private: T mOriginalValue; }; protected: static BlockDescriptor& selfBlockDescriptor() { static BlockDescriptor sBlockDescriptor; return sBlockDescriptor; } private: param_handle_t mCurChoice; const Param* getCurrentChoice() const { return BaseBlock::getParamFromHandle(mCurChoice); } }; template <typename DERIVED_BLOCK, typename BASE_BLOCK = BaseBlock> class Block : public BASE_BLOCK { typedef Block<DERIVED_BLOCK, BASE_BLOCK> self_t; typedef Block<DERIVED_BLOCK, BASE_BLOCK> block_t; public: typedef BASE_BLOCK base_block_t; // take all provided params from other and apply to self bool overwriteFrom(const self_t& other) { return static_cast<DERIVED_BLOCK*>(this)->mergeBlock(selfBlockDescriptor(), other, true); } // take all provided params that are not already provided, and apply to self bool fillFrom(const self_t& other) { return static_cast<DERIVED_BLOCK*>(this)->mergeBlock(selfBlockDescriptor(), other, false); } virtual const BlockDescriptor& mostDerivedBlockDescriptor() const { return selfBlockDescriptor(); } virtual BlockDescriptor& mostDerivedBlockDescriptor() { return selfBlockDescriptor(); } protected: Block() { //#pragma message("Parsing LLInitParam::Block") BaseBlock::init(selfBlockDescriptor(), BASE_BLOCK::selfBlockDescriptor(), sizeof(DERIVED_BLOCK)); } // // Nested classes for declaring parameters // template <typename T, typename NAME_VALUE_LOOKUP = TypeValues<T> > class Optional : public TypedParam<T, NAME_VALUE_LOOKUP, false> { public: typedef TypedParam<T, NAME_VALUE_LOOKUP, false, IsBlock<ParamValue<T, NAME_VALUE_LOOKUP> >::value> super_t; typedef typename super_t::value_assignment_t value_assignment_t; explicit Optional(const char* name = "", value_assignment_t val = defaultValue<T>()) : super_t(DERIVED_BLOCK::selfBlockDescriptor(), name, val, NULL, 0, 1) { //#pragma message("Parsing LLInitParam::Block::Optional") } Optional& operator=(value_assignment_t val) { set(val); return *this; } DERIVED_BLOCK& operator()(value_assignment_t val) { super_t::set(val); return static_cast<DERIVED_BLOCK&>(Param::enclosingBlock()); } using super_t::operator(); }; template <typename T, typename NAME_VALUE_LOOKUP = TypeValues<T> > class Mandatory : public TypedParam<T, NAME_VALUE_LOOKUP, false> { public: typedef TypedParam<T, NAME_VALUE_LOOKUP, false, IsBlock<ParamValue<T, NAME_VALUE_LOOKUP> >::value> super_t; typedef Mandatory<T, NAME_VALUE_LOOKUP> self_t; typedef typename super_t::value_assignment_t value_assignment_t; // mandatory parameters require a name to be parseable explicit Mandatory(const char* name = "", value_assignment_t val = defaultValue<T>()) : super_t(DERIVED_BLOCK::selfBlockDescriptor(), name, val, &validate, 1, 1) {} Mandatory& operator=(value_assignment_t val) { set(val); return *this; } DERIVED_BLOCK& operator()(typename super_t::value_assignment_t val) { super_t::set(val); return static_cast<DERIVED_BLOCK&>(Param::enclosingBlock()); } using super_t::operator(); static bool validate(const Param* p) { // valid only if provided return static_cast<const self_t*>(p)->isProvided(); } }; template <typename T, typename RANGE = BaseBlock::AnyAmount, typename NAME_VALUE_LOOKUP = TypeValues<T> > class Multiple : public TypedParam<T, NAME_VALUE_LOOKUP, true> { public: typedef TypedParam<T, NAME_VALUE_LOOKUP, true, IsBlock<ParamValue<T, NAME_VALUE_LOOKUP> >::value> super_t; typedef Multiple<T, RANGE, NAME_VALUE_LOOKUP> self_t; typedef typename super_t::container_t container_t; typedef typename super_t::value_assignment_t value_assignment_t; typedef typename super_t::iterator iterator; typedef typename super_t::const_iterator const_iterator; explicit Multiple(const char* name = "") : super_t(DERIVED_BLOCK::selfBlockDescriptor(), name, container_t(), &validate, RANGE::minCount(), RANGE::maxCount()) {} Multiple& operator=(value_assignment_t val) { set(val); return *this; } DERIVED_BLOCK& operator()(typename super_t::value_assignment_t val) { super_t::set(val); return static_cast<DERIVED_BLOCK&>(Param::enclosingBlock()); } static bool validate(const Param* paramp) { U32 num_valid = ((super_t*)paramp)->numValidElements(); return RANGE::minCount() <= num_valid && num_valid <= RANGE::maxCount(); } }; template <typename T, typename RANGE = BaseBlock::AnyAmount, typename NAME_VALUE_LOOKUP = TypeValues<T> > class Batch : private TypedParam<T, NAME_VALUE_LOOKUP, false> { public: typedef ParamValue<T, NAME_VALUE_LOOKUP> param_value_t; typedef TypedParam<T, NAME_VALUE_LOOKUP, false, IsBlock<param_value_t>::value> super_t; typedef Batch<T, RANGE, NAME_VALUE_LOOKUP> self_t; typedef typename super_t::value_assignment_t value_assignment_t; typedef typename super_t::value_t value_t; struct BatchDefaultValue : public ParamDescriptor::UserData { BatchDefaultValue(const T& value) : mValue(value) {} T mValue; }; explicit Batch(const char* name, value_assignment_t val) : super_t(DERIVED_BLOCK::selfBlockDescriptor(), name, val, NULL, 0, 1), mLastParseGeneration(-1) { BlockDescriptor& block_descriptor = DERIVED_BLOCK::selfBlockDescriptor(); if (LL_UNLIKELY(block_descriptor.mInitializationState == BlockDescriptor::INITIALIZING)) { ParamDescriptorPtr param_descriptorp = block_descriptor.mCurrentBlockPtr->findParamDescriptor(*this); if (param_descriptorp) { param_descriptorp->mDeserializeFunc = &deserializeParam; param_descriptorp->mUserData = new BatchDefaultValue(new param_value_t(val)); } } } explicit Batch(const char* name = "") : super_t(DERIVED_BLOCK::selfBlockDescriptor(), name, defaultValue<T>(), NULL, 0, 1), mLastParseGeneration(-1) { BlockDescriptor& block_descriptor = DERIVED_BLOCK::selfBlockDescriptor(); if (LL_UNLIKELY(block_descriptor.mInitializationState == BlockDescriptor::INITIALIZING)) { ParamDescriptorPtr param_descriptorp = block_descriptor.mCurrentBlockPtr->findParamDescriptor(*this); if (param_descriptorp) { param_descriptorp->mDeserializeFunc = &deserializeParam; } } } Batch& operator=(value_assignment_t val) { set(val); return *this; } DERIVED_BLOCK& operator()(value_assignment_t val) { super_t::set(val); return static_cast<DERIVED_BLOCK&>(Param::enclosingBlock()); } using super_t::operator(); private: static bool deserializeParam(Param& param, Parser& parser, const Parser::name_stack_range_t& name_stack, S32 generation) { self_t& typed_param = static_cast<self_t&>(param); if (generation != typed_param.mLastParseGeneration) { ParamDescriptorPtr descriptor = typed_param.enclosingBlock().findParamDescriptor(param); if (descriptor && static_cast<BatchDefaultValue*>(descriptor->mUserData)) { static_cast<param_value_t&>(typed_param) = (static_cast<BatchDefaultValue*>(descriptor->mUserData))->mValue; } else { static_cast<param_value_t&>(typed_param) = param_value_t(value_t()); } typed_param.mLastParseGeneration = generation; } return super_t::deserializeParam(param, parser, name_stack, generation); } S32 mLastParseGeneration; }; class Deprecated : public Param { public: explicit Deprecated(const char* name) : Param(DERIVED_BLOCK::selfBlockDescriptor().mCurrentBlockPtr) { BlockDescriptor& block_descriptor = DERIVED_BLOCK::selfBlockDescriptor(); if (LL_UNLIKELY(block_descriptor.mInitializationState == BlockDescriptor::INITIALIZING)) { ParamDescriptorPtr param_descriptor = ParamDescriptorPtr(new ParamDescriptor( block_descriptor.mCurrentBlockPtr->getHandleFromParam(this), NULL, &deserializeParam, NULL, NULL, NULL, 0, S32_MAX)); BaseBlock::addParam(block_descriptor, param_descriptor, name); } } static bool deserializeParam(Param& param, Parser& parser, const Parser::name_stack_range_t& name_stack, S32 generation) { if (name_stack.first == name_stack.second) { //std::string message = llformat("Deprecated value %s ignored", getName().c_str()); //parser.parserWarning(message); return true; } return false; } }; typedef Deprecated Ignored; protected: static BlockDescriptor& selfBlockDescriptor() { static BlockDescriptor sBlockDescriptor; return sBlockDescriptor; } }; template<typename T> class CustomParamValue : public Block<ParamValue<T, TypeValues<T> > >, public TypeValues<T> { public: typedef enum e_value_age { VALUE_NEEDS_UPDATE, // mValue needs to be refreshed from the block parameters VALUE_AUTHORITATIVE, // mValue holds the authoritative value (which has been replicated to the block parameters via updateBlockFromValue) BLOCK_AUTHORITATIVE // mValue is derived from the block parameters, which are authoritative } EValueAge; typedef ParamValue<T, TypeValues<T> > derived_t; typedef CustomParamValue<T> self_t; typedef Block<derived_t> block_t; typedef const T& value_assignment_t; CustomParamValue(const T& value = T()) : mValue(value), mValueAge(VALUE_AUTHORITATIVE), mKeyVersion(0), mValidatedVersion(-1), mValidated(false) {} bool deserializeBlock(Parser& parser, Parser::name_stack_range_t name_stack, S32 generation) { derived_t& typed_param = static_cast<derived_t&>(*this); // try to parse direct value T if (name_stack.first == name_stack.second) { if(parser.readValue(typed_param.mValue)) { typed_param.mValueAge = VALUE_AUTHORITATIVE; typed_param.updateBlockFromValue(false); typed_param.clearValueName(); return true; } } // fall back on parsing block components for T return typed_param.BaseBlock::deserializeBlock(parser, name_stack, generation); } void serializeBlock(Parser& parser, Parser::name_stack_t name_stack = Parser::name_stack_t(), const BaseBlock* diff_block = NULL) const { const derived_t& typed_param = static_cast<const derived_t&>(*this); const derived_t* diff_param = static_cast<const derived_t*>(diff_block); std::string key = typed_param.getValueName(); // first try to write out name of name/value pair if (!key.empty()) { if (!diff_param || !ParamCompare<std::string>::equals(diff_param->getValueName(), key)) { parser.writeValue(key, name_stack); } } // then try to serialize value directly else if (!diff_param || !ParamCompare<T>::equals(typed_param.getValue(), diff_param->getValue())) { if (!parser.writeValue(typed_param.getValue(), name_stack)) { //RN: *always* serialize provided components of BlockValue (don't pass diff_param on), // since these tend to be viewed as the constructor arguments for the value T. It seems // cleaner to treat the uniqueness of a BlockValue according to the generated value, and // not the individual components. This way <color red="0" green="1" blue="0"/> will not // be exported as <color green="1"/>, since it was probably the intent of the user to // be specific about the RGB color values. This also fixes an issue where we distinguish // between rect.left not being provided and rect.left being explicitly set to 0 (same as default) if (typed_param.mValueAge == VALUE_AUTHORITATIVE) { // if the value is authoritative but the parser doesn't accept the value type // go ahead and make a copy, and splat the value out to its component params // and serialize those params derived_t copy(typed_param); copy.updateBlockFromValue(true); copy.block_t::serializeBlock(parser, name_stack, NULL); } else { block_t::serializeBlock(parser, name_stack, NULL); } } } } bool inspectBlock(Parser& parser, Parser::name_stack_t name_stack = Parser::name_stack_t(), S32 min_count = 0, S32 max_count = S32_MAX) const { // first, inspect with actual type... parser.inspectValue<T>(name_stack, min_count, max_count, NULL); if (TypeValues<T>::getPossibleValues()) { //...then inspect with possible string values... parser.inspectValue<std::string>(name_stack, min_count, max_count, TypeValues<T>::getPossibleValues()); } // then recursively inspect contents... return block_t::inspectBlock(parser, name_stack, min_count, max_count); } bool validateBlock(bool emit_errors = true) const { if (mValueAge == VALUE_NEEDS_UPDATE) { if (block_t::validateBlock(emit_errors)) { // clear stale keyword associated with old value TypeValues<T>::clearValueName(); mValueAge = BLOCK_AUTHORITATIVE; static_cast<derived_t*>(const_cast<self_t*>(this))->updateValueFromBlock(); return true; } else { //block value incomplete, so not considered provided // will attempt to revalidate on next call to isProvided() return false; } } else { // we have a valid value in hand return true; } } // propagate change status up to enclosing block /*virtual*/ void paramChanged(const Param& changed_param, bool user_provided) { BaseBlock::paramChanged(changed_param, user_provided); if (user_provided) { // a parameter changed, so our value is out of date mValueAge = VALUE_NEEDS_UPDATE; } } void setValue(value_assignment_t val) { derived_t& typed_param = static_cast<derived_t&>(*this); // set param version number to be up to date, so we ignore block contents mValueAge = VALUE_AUTHORITATIVE; mValue = val; typed_param.clearValueName(); static_cast<derived_t*>(this)->updateBlockFromValue(false); } value_assignment_t getValue() const { validateBlock(true); return mValue; } T& getValue() { validateBlock(true); return mValue; } S32 mKeyVersion; protected: // use this from within updateValueFromBlock() to set the value without making it authoritative void updateValue(value_assignment_t value) { mValue = value; } bool mergeBlockParam(bool param_provided, BlockDescriptor& block_data, const BaseBlock& other, bool overwrite) { if (param_provided) { return mergeBlock(block_data, other, overwrite); } return false; } bool mergeBlock(BlockDescriptor& block_data, const BaseBlock& other, bool overwrite) { const derived_t& src_typed_param = static_cast<const derived_t&>(other); if (src_typed_param.mValueAge == VALUE_AUTHORITATIVE) { // copy value over setValue(src_typed_param.getValue()); return true; } else { // merge individual parameters into destination return block_t::mergeBlock(block_t::selfBlockDescriptor(), src_typed_param, overwrite); } } mutable S32 mValidatedVersion; mutable bool mValidated; // lazy validation flag private: mutable T mValue; mutable EValueAge mValueAge; }; } #endif // LL_LLPARAM_H