315 lines
8.6 KiB
C++
315 lines
8.6 KiB
C++
/**
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* @file llsdparam.cpp
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* @brief parameter block abstraction for creating complex objects and
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* parsing construction parameters from xml and LLSD
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*
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* $LicenseInfo:firstyear=2008&license=viewerlgpl$
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* Second Life Viewer Source Code
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* Copyright (C) 2010, Linden Research, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation;
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* version 2.1 of the License only.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
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* $/LicenseInfo$
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*/
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#include "linden_common.h"
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// Project includes
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#include "llsdparam.h"
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#include "llsdutil.h"
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static LLInitParam::Parser::parser_read_func_map_t sReadFuncs;
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static LLInitParam::Parser::parser_write_func_map_t sWriteFuncs;
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static LLInitParam::Parser::parser_inspect_func_map_t sInspectFuncs;
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//
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// LLParamSDParser
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//
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LLParamSDParser::LLParamSDParser()
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: Parser(sReadFuncs, sWriteFuncs, sInspectFuncs)
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{
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using boost::bind;
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if (sReadFuncs.empty())
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{
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registerParserFuncs<LLInitParam::NoParamValue>(readNoValue, &LLParamSDParser::writeNoValue);
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registerParserFuncs<S32>(readS32, &LLParamSDParser::writeTypedValue<S32>);
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registerParserFuncs<U32>(readU32, &LLParamSDParser::writeU32Param);
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registerParserFuncs<F32>(readF32, &LLParamSDParser::writeTypedValue<F32>);
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registerParserFuncs<F64>(readF64, &LLParamSDParser::writeTypedValue<F64>);
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registerParserFuncs<bool>(readBool, &LLParamSDParser::writeTypedValue<bool>);
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registerParserFuncs<std::string>(readString, &LLParamSDParser::writeTypedValue<std::string>);
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registerParserFuncs<LLUUID>(readUUID, &LLParamSDParser::writeTypedValue<LLUUID>);
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registerParserFuncs<LLDate>(readDate, &LLParamSDParser::writeTypedValue<LLDate>);
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registerParserFuncs<LLURI>(readURI, &LLParamSDParser::writeTypedValue<LLURI>);
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registerParserFuncs<LLSD>(readSD, &LLParamSDParser::writeTypedValue<LLSD>);
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}
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}
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// special case handling of U32 due to ambiguous LLSD::assign overload
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bool LLParamSDParser::writeU32Param(LLParamSDParser::parser_t& parser, const void* val_ptr, const parser_t::name_stack_t& name_stack)
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{
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LLParamSDParser& sdparser = static_cast<LLParamSDParser&>(parser);
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if (!sdparser.mWriteRootSD) return false;
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LLSD* sd_to_write = sdparser.getSDWriteNode(name_stack);
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if (!sd_to_write) return false;
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sd_to_write->assign((S32)*((const U32*)val_ptr));
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return true;
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}
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bool LLParamSDParser::writeNoValue(LLParamSDParser::parser_t& parser, const void* val_ptr, const parser_t::name_stack_t& name_stack)
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{
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LLParamSDParser& sdparser = static_cast<LLParamSDParser&>(parser);
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if (!sdparser.mWriteRootSD) return false;
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LLSD* sd_to_write = sdparser.getSDWriteNode(name_stack);
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if (!sd_to_write) return false;
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return true;
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}
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void LLParamSDParser::readSD(const LLSD& sd, LLInitParam::BaseBlock& block, bool silent)
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{
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mCurReadSD = NULL;
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mNameStack.clear();
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setParseSilently(silent);
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readSDValues(sd, block);
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}
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void LLParamSDParser::writeSD(LLSD& sd, const LLInitParam::BaseBlock& block)
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{
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mNameStack.clear();
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mWriteRootSD = &sd;
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block.serializeBlock(*this);
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}
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const LLSD NO_VALUE_MARKER;
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void LLParamSDParser::readSDValues(const LLSD& sd, LLInitParam::BaseBlock& block)
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{
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if (sd.isMap())
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{
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for (LLSD::map_const_iterator it = sd.beginMap();
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it != sd.endMap();
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++it)
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{
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mNameStack.push_back(make_pair(it->first, newParseGeneration()));
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readSDValues(it->second, block);
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mNameStack.pop_back();
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}
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}
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else if (sd.isArray())
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{
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for (LLSD::array_const_iterator it = sd.beginArray();
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it != sd.endArray();
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++it)
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{
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mNameStack.back().second = newParseGeneration();
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readSDValues(*it, block);
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}
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}
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else if (sd.isUndefined())
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{
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mCurReadSD = &NO_VALUE_MARKER;
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block.submitValue(mNameStack, *this);
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}
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else
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{
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mCurReadSD = &sd;
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block.submitValue(mNameStack, *this);
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}
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}
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/*virtual*/ std::string LLParamSDParser::getCurrentElementName()
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{
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std::string full_name = "sd";
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for (name_stack_t::iterator it = mNameStack.begin();
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it != mNameStack.end();
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++it)
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{
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full_name += llformat("[%s]", it->first.c_str());
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}
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return full_name;
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}
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LLSD* LLParamSDParser::getSDWriteNode(const parser_t::name_stack_t& name_stack)
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{
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//TODO: implement nested LLSD writing
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LLSD* sd_to_write = mWriteRootSD;
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bool new_traversal = false;
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for (name_stack_t::const_iterator it = name_stack.begin(), prev_it = mNameStack.begin();
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it != name_stack.end();
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++it)
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{
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bool new_array_entry = false;
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if (prev_it == mNameStack.end())
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{
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new_traversal = true;
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}
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else
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{
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if (!new_traversal // have not diverged yet from previous trace
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&& prev_it->first == it->first // names match
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&& prev_it->second != it->second) // versions differ
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{
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// name stacks match, but version numbers differ in last place.
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// create a different entry at this point using an LLSD array
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new_array_entry = true;
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}
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if (prev_it->first != it->first // names differ
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|| prev_it->second != it->second) // versions differ
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{
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// at this point we have diverged from our last trace
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// so any elements referenced here are new
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new_traversal = true;
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}
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}
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LLSD* child_sd = it->first.empty() ? sd_to_write : &(*sd_to_write)[it->first];
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if (child_sd->isArray())
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{
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if (new_traversal)
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{
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// write to new element at end
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sd_to_write = &(*child_sd)[child_sd->size()];
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}
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else
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{
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// write to last of existing elements, or first element if empty
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sd_to_write = &(*child_sd)[llmax(0, child_sd->size() - 1)];
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}
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}
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else
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{
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if (new_array_entry && !child_sd->isArray())
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{
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// copy child contents into first element of an array
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LLSD new_array = LLSD::emptyArray();
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new_array.append(*child_sd);
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// assign array to slot that previously held the single value
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*child_sd = new_array;
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// return next element in that array
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sd_to_write = &((*child_sd)[1]);
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}
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else
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{
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sd_to_write = child_sd;
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}
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}
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if (prev_it != mNameStack.end())
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{
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++prev_it;
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}
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}
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mNameStack = name_stack;
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//llinfos << ll_pretty_print_sd(*mWriteRootSD) << llendl;
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return sd_to_write;
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}
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bool LLParamSDParser::readNoValue(Parser& parser, void* val_ptr)
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{
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LLParamSDParser& self = static_cast<LLParamSDParser&>(parser);
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return self.mCurReadSD == &NO_VALUE_MARKER;
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}
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bool LLParamSDParser::readS32(Parser& parser, void* val_ptr)
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{
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LLParamSDParser& self = static_cast<LLParamSDParser&>(parser);
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*((S32*)val_ptr) = self.mCurReadSD->asInteger();
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return true;
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}
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bool LLParamSDParser::readU32(Parser& parser, void* val_ptr)
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{
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LLParamSDParser& self = static_cast<LLParamSDParser&>(parser);
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*((U32*)val_ptr) = self.mCurReadSD->asInteger();
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return true;
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}
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bool LLParamSDParser::readF32(Parser& parser, void* val_ptr)
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{
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LLParamSDParser& self = static_cast<LLParamSDParser&>(parser);
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*((F32*)val_ptr) = self.mCurReadSD->asReal();
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return true;
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}
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bool LLParamSDParser::readF64(Parser& parser, void* val_ptr)
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{
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LLParamSDParser& self = static_cast<LLParamSDParser&>(parser);
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*((F64*)val_ptr) = self.mCurReadSD->asReal();
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return true;
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}
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bool LLParamSDParser::readBool(Parser& parser, void* val_ptr)
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{
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LLParamSDParser& self = static_cast<LLParamSDParser&>(parser);
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*((bool*)val_ptr) = self.mCurReadSD->asBoolean();
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return true;
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}
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bool LLParamSDParser::readString(Parser& parser, void* val_ptr)
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{
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LLParamSDParser& self = static_cast<LLParamSDParser&>(parser);
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*((std::string*)val_ptr) = self.mCurReadSD->asString();
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return true;
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}
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bool LLParamSDParser::readUUID(Parser& parser, void* val_ptr)
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{
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LLParamSDParser& self = static_cast<LLParamSDParser&>(parser);
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*((LLUUID*)val_ptr) = self.mCurReadSD->asUUID();
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return true;
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}
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bool LLParamSDParser::readDate(Parser& parser, void* val_ptr)
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{
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LLParamSDParser& self = static_cast<LLParamSDParser&>(parser);
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*((LLDate*)val_ptr) = self.mCurReadSD->asDate();
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return true;
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}
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bool LLParamSDParser::readURI(Parser& parser, void* val_ptr)
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{
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LLParamSDParser& self = static_cast<LLParamSDParser&>(parser);
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*((LLURI*)val_ptr) = self.mCurReadSD->asURI();
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return true;
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}
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bool LLParamSDParser::readSD(Parser& parser, void* val_ptr)
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{
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LLParamSDParser& self = static_cast<LLParamSDParser&>(parser);
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*((LLSD*)val_ptr) = *self.mCurReadSD;
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return true;
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}
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