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#include "extensions.hpp"
#include <cassert>
#include <stdexcept>
#include "generator.hpp"
#include "literals.hpp"
namespace Compiler
{
Extensions::Extensions()
: mNextKeywordIndex(-1)
{
}
int Extensions::searchKeyword(const std::string& keyword) const
{
auto iter = mKeywords.find(keyword);
if (iter == mKeywords.end())
return 0;
return iter->second;
}
bool Extensions::isFunction(
int keyword, ScriptReturn& returnType, ScriptArgs& argumentType, bool& explicitReference) const
{
auto iter = mFunctions.find(keyword);
if (iter == mFunctions.end())
return false;
if (explicitReference && iter->second.mCodeExplicit == -1)
explicitReference = false;
returnType = iter->second.mReturn;
argumentType = iter->second.mArguments;
return true;
}
bool Extensions::isInstruction(int keyword, ScriptArgs& argumentType, bool& explicitReference) const
{
auto iter = mInstructions.find(keyword);
if (iter == mInstructions.end())
return false;
if (explicitReference && iter->second.mCodeExplicit == -1)
explicitReference = false;
argumentType = iter->second.mArguments;
return true;
}
void Extensions::registerFunction(
std::string_view keyword, ScriptReturn returnType, std::string_view argumentType, int code, int codeExplicit)
{
Function function;
if (argumentType.find('/') == std::string_view::npos)
{
function.mSegment = 5;
assert(code >= 33554432 && code <= 67108863);
assert(codeExplicit == -1 || (codeExplicit >= 33554432 && codeExplicit <= 67108863));
}
else
{
function.mSegment = 3;
assert(code >= 0x20000 && code <= 0x2ffff);
assert(codeExplicit == -1 || (codeExplicit >= 0x20000 && codeExplicit <= 0x2ffff));
}
int keywordIndex = mNextKeywordIndex--;
mKeywords.emplace(keyword, keywordIndex);
function.mReturn = returnType;
function.mArguments = argumentType;
function.mCode = code;
function.mCodeExplicit = codeExplicit;
mFunctions.emplace(keywordIndex, std::move(function));
}
void Extensions::registerInstruction(
std::string_view keyword, std::string_view argumentType, int code, int codeExplicit)
{
Instruction instruction;
if (argumentType.find('/') == std::string_view::npos)
{
instruction.mSegment = 5;
assert(code >= 33554432 && code <= 67108863);
assert(codeExplicit == -1 || (codeExplicit >= 33554432 && codeExplicit <= 67108863));
}
else
{
instruction.mSegment = 3;
assert(code >= 0x20000 && code <= 0x2ffff);
assert(codeExplicit == -1 || (codeExplicit >= 0x20000 && codeExplicit <= 0x2ffff));
}
int keywordIndex = mNextKeywordIndex--;
mKeywords.emplace(keyword, keywordIndex);
instruction.mArguments = argumentType;
instruction.mCode = code;
instruction.mCodeExplicit = codeExplicit;
mInstructions.emplace(keywordIndex, std::move(instruction));
}
void Extensions::generateFunctionCode(int keyword, std::vector<Interpreter::Type_Code>& code, Literals& literals,
const std::string& id, int optionalArguments) const
{
assert(optionalArguments >= 0);
auto iter = mFunctions.find(keyword);
if (iter == mFunctions.end())
throw std::logic_error("unknown custom function keyword");
if (optionalArguments && iter->second.mSegment != 3)
throw std::logic_error("functions with optional arguments must be placed into segment 3");
if (!id.empty())
{
if (iter->second.mCodeExplicit == -1)
throw std::logic_error("explicit references not supported");
int index = literals.addString(id);
Generator::pushInt(code, literals, index);
}
switch (iter->second.mSegment)
{
case 3:
if (optionalArguments >= 256)
throw std::logic_error("number of optional arguments is too large for segment 3");
code.push_back(Generator::segment3(
id.empty() ? iter->second.mCode : iter->second.mCodeExplicit, optionalArguments));
break;
case 5:
code.push_back(Generator::segment5(id.empty() ? iter->second.mCode : iter->second.mCodeExplicit));
break;
default:
throw std::logic_error("unsupported code segment");
}
}
void Extensions::generateInstructionCode(int keyword, std::vector<Interpreter::Type_Code>& code, Literals& literals,
const std::string& id, int optionalArguments) const
{
assert(optionalArguments >= 0);
auto iter = mInstructions.find(keyword);
if (iter == mInstructions.end())
throw std::logic_error("unknown custom instruction keyword");
if (optionalArguments && iter->second.mSegment != 3)
throw std::logic_error("instructions with optional arguments must be placed into segment 3");
if (!id.empty())
{
if (iter->second.mCodeExplicit == -1)
throw std::logic_error("explicit references not supported");
int index = literals.addString(id);
Generator::pushInt(code, literals, index);
}
switch (iter->second.mSegment)
{
case 3:
if (optionalArguments >= 256)
throw std::logic_error("number of optional arguments is too large for segment 3");
code.push_back(Generator::segment3(
id.empty() ? iter->second.mCode : iter->second.mCodeExplicit, optionalArguments));
break;
case 5:
code.push_back(Generator::segment5(id.empty() ? iter->second.mCode : iter->second.mCodeExplicit));
break;
default:
throw std::logic_error("unsupported code segment");
}
}
void Extensions::listKeywords(std::vector<std::string>& keywords) const
{
for (const auto& mKeyword : mKeywords)
keywords.push_back(mKeyword.first);
}
}
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