mirror of
https://github.com/autc04/Retro68.git
synced 2024-10-05 04:55:29 +00:00
212 lines
3.9 KiB
C++
212 lines
3.9 KiB
C++
#include "Expression.h"
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#include "ResourceCompiler.h"
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#include <cassert>
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#include <iostream>
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#include <fstream>
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int Expression::evaluateInt(ResourceCompiler *ctx)
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{
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throw TypeError();
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}
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std::string Expression::evaluateString(ResourceCompiler *ctx)
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{
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throw TypeError();
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}
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Expression::~Expression()
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{
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}
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StringExpr::~StringExpr()
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{
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}
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std::string StringExpr::evaluateString(ResourceCompiler *ctx)
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{
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return str;
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}
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IntExpr::~IntExpr()
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{
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}
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int IntExpr::evaluateInt(ResourceCompiler *ctx)
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{
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return val;
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}
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void CompoundExpr::addItem(ExprPtr item)
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{
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items.push_back(item);
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}
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CompoundExpr::~CompoundExpr()
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{
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}
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BinaryExpr::~BinaryExpr()
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{
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}
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int BinaryExpr::evaluateInt(ResourceCompiler *ctx)
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{
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switch(op)
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{
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case BinaryOp::XOR:
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return a->evaluateInt(ctx) ^ b->evaluateInt(ctx);
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case BinaryOp::OR:
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return a->evaluateInt(ctx) | b->evaluateInt(ctx);
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case BinaryOp::AND:
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return a->evaluateInt(ctx) & b->evaluateInt(ctx);
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case BinaryOp::SHIFTLEFT:
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return a->evaluateInt(ctx) << b->evaluateInt(ctx);
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case BinaryOp::SHIFTRIGHT:
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return a->evaluateInt(ctx) >> b->evaluateInt(ctx);
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case BinaryOp::EQUAL:
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return a->evaluateInt(ctx) == b->evaluateInt(ctx);
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case BinaryOp::NOTEQUAL:
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return a->evaluateInt(ctx) != b->evaluateInt(ctx);
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case BinaryOp::PLUS:
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return a->evaluateInt(ctx) + b->evaluateInt(ctx);
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case BinaryOp::MINUS:
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return a->evaluateInt(ctx) - b->evaluateInt(ctx);
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case BinaryOp::MULTIPLY:
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return a->evaluateInt(ctx) * b->evaluateInt(ctx);
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case BinaryOp::DIVIDE:
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return a->evaluateInt(ctx) / b->evaluateInt(ctx);
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default:
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throw TypeError();
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break;
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}
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}
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std::string BinaryExpr::evaluateString(ResourceCompiler *ctx)
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{
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switch(op)
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{
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case BinaryOp::CONCAT:
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return a->evaluateString(ctx) + b->evaluateString(ctx);
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default:
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throw TypeError();
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break;
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}
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}
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UnaryExpr::~UnaryExpr()
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{
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}
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int UnaryExpr::evaluateInt(ResourceCompiler *ctx)
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{
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switch(op)
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{
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case UnaryOp::MINUS:
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return -a->evaluateInt(ctx);
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case UnaryOp::COMPLEMENT:
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return ~a->evaluateInt(ctx);
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}
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}
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IdentifierExpr::IdentifierExpr(std::string id)
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: id(id)
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{
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}
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void IdentifierExpr::addArgument(ExprPtr e)
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{
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arguments.push_back(e);
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}
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ExprPtr IdentifierExpr::lookup(ResourceCompiler *ctx)
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{
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Subscripts sub;
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for(auto arg : arguments)
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sub.addSubscript(arg->evaluateInt(ctx));
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ExprPtr val = ctx->lookupIdentifier(id, sub);
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assert(val);
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return val;
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}
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int IdentifierExpr::evaluateInt(ResourceCompiler *ctx)
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{
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if(ctx->isPrePass())
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return 0;
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return lookup(ctx)->evaluateInt(ctx);
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}
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std::string IdentifierExpr::evaluateString(ResourceCompiler *ctx)
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{
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return lookup(ctx)->evaluateString(ctx);
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}
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CaseExpr::CaseExpr(const std::string &tag, CompoundExprPtr expr)
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: tag(tag), expr(expr)
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{
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}
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int CountOfExpr::evaluateInt(ResourceCompiler *ctx)
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{
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assert(arg->arguments.size() == 0);
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return ctx->getArrayCount(arg->id);
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}
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int ArrayIndexExpr::evaluateInt(ResourceCompiler *ctx)
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{
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assert(arg->arguments.size() == 0);
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return ctx->getArrayIndex(arg->id);
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}
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std::string ReadExpr::evaluateString(ResourceCompiler *ctx)
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{
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std::string filename = arg->evaluateString(ctx);
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std::ifstream instream(filename);
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// ### TODO: check error
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return std::string(std::istreambuf_iterator<char>(instream.rdbuf()),
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std::istreambuf_iterator<char>());
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}
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int UnimplementedExpr::evaluateInt(ResourceCompiler *ctx)
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{
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std::cerr << msg << std::endl;
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return 0;
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}
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std::string UnimplementedExpr::evaluateString(ResourceCompiler *ctx)
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{
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std::cerr << msg << std::endl;
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return "";
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}
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PeekExpr::PeekExpr(ExprPtr addr, ExprPtr offset, ExprPtr size)
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: addr(addr), offset(offset), size(size)
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{
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}
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PeekExpr::PeekExpr(ExprPtr addr, int size)
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: addr(addr),
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offset(std::make_shared<IntExpr>(0)),
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size(std::make_shared<IntExpr>(size))
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{
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}
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int PeekExpr::evaluateInt(ResourceCompiler *ctx)
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{
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int p = addr->evaluateInt(ctx) + offset->evaluateInt(ctx);
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int s = size->evaluateInt(ctx);
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return ctx->peek(p, s);
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}
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