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Diffstat (limited to 'indra/llcommon/llinitparam.cpp')
| -rwxr-xr-x | indra/llcommon/llinitparam.cpp | 463 |
1 files changed, 463 insertions, 0 deletions
diff --git a/indra/llcommon/llinitparam.cpp b/indra/llcommon/llinitparam.cpp new file mode 100755 index 0000000000..89c831d296 --- /dev/null +++ b/indra/llcommon/llinitparam.cpp @@ -0,0 +1,463 @@ +/** + * @file llinitparam.cpp + * @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 + * $/LicenseInfo$ + */ + +#include "linden_common.h" + +#include "llinitparam.h" + + +namespace LLInitParam +{ + // + // Param + // + Param::Param(BaseBlock* enclosing_block) + : mIsProvided(false) + { + const U8* my_addr = reinterpret_cast<const U8*>(this); + const U8* block_addr = reinterpret_cast<const U8*>(enclosing_block); + U32 enclosing_block_offset = 0x7FFFffff & (U32)(my_addr - block_addr); + mEnclosingBlockOffsetLow = enclosing_block_offset & 0x0000ffff; + mEnclosingBlockOffsetHigh = (enclosing_block_offset & 0x007f0000) >> 16; + } + + // + // ParamDescriptor + // + ParamDescriptor::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) + : mParamHandle(p), + mMergeFunc(merge_func), + mDeserializeFunc(deserialize_func), + mSerializeFunc(serialize_func), + mValidationFunc(validation_func), + mInspectFunc(inspect_func), + mMinCount(min_count), + mMaxCount(max_count), + mUserData(NULL) + {} + + ParamDescriptor::ParamDescriptor() + : mParamHandle(0), + mMergeFunc(NULL), + mDeserializeFunc(NULL), + mSerializeFunc(NULL), + mValidationFunc(NULL), + mInspectFunc(NULL), + mMinCount(0), + mMaxCount(0), + mUserData(NULL) + {} + + ParamDescriptor::~ParamDescriptor() + { + delete mUserData; + } + + // + // Parser + // + Parser::~Parser() + {} + + void Parser::parserWarning(const std::string& message) + { + if (mParseSilently) return; + llwarns << message << llendl; + } + + void Parser::parserError(const std::string& message) + { + if (mParseSilently) return; + llerrs << message << llendl; + } + + + // + // BlockDescriptor + // + void BlockDescriptor::aggregateBlockData(BlockDescriptor& src_block_data) + { + mNamedParams.insert(src_block_data.mNamedParams.begin(), src_block_data.mNamedParams.end()); + std::copy(src_block_data.mUnnamedParams.begin(), src_block_data.mUnnamedParams.end(), std::back_inserter(mUnnamedParams)); + std::copy(src_block_data.mValidationList.begin(), src_block_data.mValidationList.end(), std::back_inserter(mValidationList)); + std::copy(src_block_data.mAllParams.begin(), src_block_data.mAllParams.end(), std::back_inserter(mAllParams)); + } + + void BlockDescriptor::addParam(const ParamDescriptorPtr in_param, const char* char_name) + { + // create a copy of the param descriptor in mAllParams + // so other data structures can store a pointer to it + mAllParams.push_back(in_param); + ParamDescriptorPtr param(mAllParams.back()); + + std::string name(char_name); + if ((size_t)param->mParamHandle > mMaxParamOffset) + { + llerrs << "Attempted to register param with block defined for parent class, make sure to derive from LLInitParam::Block<YOUR_CLASS, PARAM_BLOCK_BASE_CLASS>" << llendl; + } + + if (name.empty()) + { + mUnnamedParams.push_back(param); + } + else + { + // don't use insert, since we want to overwrite existing entries + mNamedParams[name] = param; + } + + if (param->mValidationFunc) + { + mValidationList.push_back(std::make_pair(param->mParamHandle, param->mValidationFunc)); + } + } + + BlockDescriptor::BlockDescriptor() + : mMaxParamOffset(0), + mInitializationState(UNINITIALIZED), + mCurrentBlockPtr(NULL) + {} + + // called by each derived class in least to most derived order + void BaseBlock::init(BlockDescriptor& descriptor, BlockDescriptor& base_descriptor, size_t block_size) + { + descriptor.mCurrentBlockPtr = this; + descriptor.mMaxParamOffset = block_size; + + switch(descriptor.mInitializationState) + { + case BlockDescriptor::UNINITIALIZED: + // copy params from base class here + descriptor.aggregateBlockData(base_descriptor); + + descriptor.mInitializationState = BlockDescriptor::INITIALIZING; + break; + case BlockDescriptor::INITIALIZING: + descriptor.mInitializationState = BlockDescriptor::INITIALIZED; + break; + case BlockDescriptor::INITIALIZED: + // nothing to do + break; + } + } + + param_handle_t BaseBlock::getHandleFromParam(const Param* param) const + { + const U8* param_address = reinterpret_cast<const U8*>(param); + const U8* baseblock_address = reinterpret_cast<const U8*>(this); + return (param_address - baseblock_address); + } + + bool BaseBlock::submitValue(Parser::name_stack_t& name_stack, Parser& p, bool silent) + { + Parser::name_stack_range_t range = std::make_pair(name_stack.begin(), name_stack.end()); + if (!deserializeBlock(p, range, true)) + { + if (!silent) + { + p.parserWarning(llformat("Failed to parse parameter \"%s\"", p.getCurrentElementName().c_str())); + } + return false; + } + return true; + } + + + bool BaseBlock::validateBlock(bool emit_errors) const + { + const BlockDescriptor& block_data = mostDerivedBlockDescriptor(); + for (BlockDescriptor::param_validation_list_t::const_iterator it = block_data.mValidationList.begin(); it != block_data.mValidationList.end(); ++it) + { + const Param* param = getParamFromHandle(it->first); + if (!it->second(param)) + { + if (emit_errors) + { + llwarns << "Invalid param \"" << getParamName(block_data, param) << "\"" << llendl; + } + return false; + } + } + return true; + } + + void BaseBlock::serializeBlock(Parser& parser, Parser::name_stack_t& name_stack, const LLInitParam::BaseBlock* diff_block) const + { + // named param is one like LLView::Params::follows + // unnamed param is like LLView::Params::rect - implicit + const BlockDescriptor& block_data = mostDerivedBlockDescriptor(); + + for (BlockDescriptor::param_list_t::const_iterator it = block_data.mUnnamedParams.begin(); + it != block_data.mUnnamedParams.end(); + ++it) + { + param_handle_t param_handle = (*it)->mParamHandle; + const Param* param = getParamFromHandle(param_handle); + ParamDescriptor::serialize_func_t serialize_func = (*it)->mSerializeFunc; + if (serialize_func) + { + const Param* diff_param = diff_block ? diff_block->getParamFromHandle(param_handle) : NULL; + serialize_func(*param, parser, name_stack, diff_param); + } + } + + for(BlockDescriptor::param_map_t::const_iterator it = block_data.mNamedParams.begin(); + it != block_data.mNamedParams.end(); + ++it) + { + param_handle_t param_handle = it->second->mParamHandle; + const Param* param = getParamFromHandle(param_handle); + ParamDescriptor::serialize_func_t serialize_func = it->second->mSerializeFunc; + if (serialize_func && param->anyProvided()) + { + // Ensure this param has not already been serialized + // Prevents <rect> from being serialized as its own tag. + bool duplicate = false; + for (BlockDescriptor::param_list_t::const_iterator it2 = block_data.mUnnamedParams.begin(); + it2 != block_data.mUnnamedParams.end(); + ++it2) + { + if (param_handle == (*it2)->mParamHandle) + { + duplicate = true; + break; + } + } + + //FIXME: for now, don't attempt to serialize values under synonyms, as current parsers + // don't know how to detect them + if (duplicate) + { + continue; + } + + name_stack.push_back(std::make_pair(it->first, !duplicate)); + const Param* diff_param = diff_block ? diff_block->getParamFromHandle(param_handle) : NULL; + serialize_func(*param, parser, name_stack, diff_param); + name_stack.pop_back(); + } + } + } + + bool BaseBlock::inspectBlock(Parser& parser, Parser::name_stack_t name_stack, S32 min_count, S32 max_count) const + { + // named param is one like LLView::Params::follows + // unnamed param is like LLView::Params::rect - implicit + const BlockDescriptor& block_data = mostDerivedBlockDescriptor(); + + for (BlockDescriptor::param_list_t::const_iterator it = block_data.mUnnamedParams.begin(); + it != block_data.mUnnamedParams.end(); + ++it) + { + param_handle_t param_handle = (*it)->mParamHandle; + const Param* param = getParamFromHandle(param_handle); + ParamDescriptor::inspect_func_t inspect_func = (*it)->mInspectFunc; + if (inspect_func) + { + name_stack.push_back(std::make_pair("", true)); + inspect_func(*param, parser, name_stack, (*it)->mMinCount, (*it)->mMaxCount); + name_stack.pop_back(); + } + } + + for(BlockDescriptor::param_map_t::const_iterator it = block_data.mNamedParams.begin(); + it != block_data.mNamedParams.end(); + ++it) + { + param_handle_t param_handle = it->second->mParamHandle; + const Param* param = getParamFromHandle(param_handle); + ParamDescriptor::inspect_func_t inspect_func = it->second->mInspectFunc; + if (inspect_func) + { + // Ensure this param has not already been inspected + bool duplicate = false; + for (BlockDescriptor::param_list_t::const_iterator it2 = block_data.mUnnamedParams.begin(); + it2 != block_data.mUnnamedParams.end(); + ++it2) + { + if (param_handle == (*it2)->mParamHandle) + { + duplicate = true; + break; + } + } + + name_stack.push_back(std::make_pair(it->first, !duplicate)); + inspect_func(*param, parser, name_stack, it->second->mMinCount, it->second->mMaxCount); + name_stack.pop_back(); + } + } + + return true; + } + + bool BaseBlock::deserializeBlock(Parser& p, Parser::name_stack_range_t& name_stack_range, bool ignored) + { + BlockDescriptor& block_data = mostDerivedBlockDescriptor(); + bool names_left = name_stack_range.first != name_stack_range.second; + + bool new_name = names_left + ? name_stack_range.first->second + : true; + + if (names_left) + { + const std::string& top_name = name_stack_range.first->first; + + BlockDescriptor::param_map_t::iterator found_it = block_data.mNamedParams.find(top_name); + if (found_it != block_data.mNamedParams.end()) + { + // find pointer to member parameter from offset table + Param* paramp = getParamFromHandle(found_it->second->mParamHandle); + ParamDescriptor::deserialize_func_t deserialize_func = found_it->second->mDeserializeFunc; + + Parser::name_stack_range_t new_name_stack(name_stack_range.first, name_stack_range.second); + ++new_name_stack.first; + if (deserialize_func(*paramp, p, new_name_stack, new_name)) + { + // value is no longer new, we know about it now + name_stack_range.first->second = false; + return true; + } + else + { + return false; + } + } + } + + // try to parse unnamed parameters, in declaration order + for ( BlockDescriptor::param_list_t::iterator it = block_data.mUnnamedParams.begin(); + it != block_data.mUnnamedParams.end(); + ++it) + { + Param* paramp = getParamFromHandle((*it)->mParamHandle); + ParamDescriptor::deserialize_func_t deserialize_func = (*it)->mDeserializeFunc; + + if (deserialize_func && deserialize_func(*paramp, p, name_stack_range, new_name)) + { + return true; + } + } + + // if no match, and no names left on stack, this is just an existence assertion of this block + // verify by calling readValue with NoParamValue type, an inherently unparseable type + if (!names_left) + { + Flag no_value; + return p.readValue(no_value); + } + + return false; + } + + void BaseBlock::addSynonym(Param& param, const std::string& synonym) + { + BlockDescriptor& block_data = mostDerivedBlockDescriptor(); + if (block_data.mInitializationState == BlockDescriptor::INITIALIZING) + { + param_handle_t handle = getHandleFromParam(¶m); + + // check for invalid derivation from a paramblock (i.e. without using + // Block<T, Base_Class> + if ((size_t)handle > block_data.mMaxParamOffset) + { + llerrs << "Attempted to register param with block defined for parent class, make sure to derive from LLInitParam::Block<YOUR_CLASS, PARAM_BLOCK_BASE_CLASS>" << llendl; + } + + ParamDescriptorPtr param_descriptor = findParamDescriptor(param); + if (param_descriptor) + { + if (synonym.empty()) + { + block_data.mUnnamedParams.push_back(param_descriptor); + } + else + { + block_data.mNamedParams[synonym] = param_descriptor; + } + } + } + } + + const std::string& BaseBlock::getParamName(const BlockDescriptor& block_data, const Param* paramp) const + { + param_handle_t handle = getHandleFromParam(paramp); + for (BlockDescriptor::param_map_t::const_iterator it = block_data.mNamedParams.begin(); it != block_data.mNamedParams.end(); ++it) + { + if (it->second->mParamHandle == handle) + { + return it->first; + } + } + + return LLStringUtil::null; + } + + ParamDescriptorPtr BaseBlock::findParamDescriptor(const Param& param) + { + param_handle_t handle = getHandleFromParam(¶m); + BlockDescriptor& descriptor = mostDerivedBlockDescriptor(); + BlockDescriptor::all_params_list_t::iterator end_it = descriptor.mAllParams.end(); + for (BlockDescriptor::all_params_list_t::iterator it = descriptor.mAllParams.begin(); + it != end_it; + ++it) + { + if ((*it)->mParamHandle == handle) return *it; + } + return ParamDescriptorPtr(); + } + + // take all provided params from other and apply to self + // NOTE: this requires that "other" is of the same derived type as this + bool BaseBlock::mergeBlock(BlockDescriptor& block_data, const BaseBlock& other, bool overwrite) + { + bool some_param_changed = false; + BlockDescriptor::all_params_list_t::const_iterator end_it = block_data.mAllParams.end(); + for (BlockDescriptor::all_params_list_t::const_iterator it = block_data.mAllParams.begin(); + it != end_it; + ++it) + { + const Param* other_paramp = other.getParamFromHandle((*it)->mParamHandle); + ParamDescriptor::merge_func_t merge_func = (*it)->mMergeFunc; + if (merge_func) + { + Param* paramp = getParamFromHandle((*it)->mParamHandle); + llassert(paramp->getEnclosingBlockOffset() == (*it)->mParamHandle); + some_param_changed |= merge_func(*paramp, *other_paramp, overwrite); + } + } + return some_param_changed; + } +} |