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joosc.cpp
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joosc.cpp
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#include "joosc.h"
#include <fstream>
#include <iostream>
#include "ast/ast.h"
#include "ast/print_visitor.h"
#include "backend/common/offset_table.h"
#include "backend/i386/writer.h"
#include "base/error.h"
#include "base/errorlist.h"
#include "base/fileset.h"
#include "lexer/lexer.h"
#include "parser/parser.h"
#include "runtime/runtime.h"
#include "types/type_info_map.h"
#include "types/type_info_map.h"
#include "types/types.h"
#include "types/typeset.h"
#include "weeder/weeder.h"
using std::cerr;
using std::cout;
using std::endl;
using std::function;
using std::ofstream;
using std::ostream;
using ast::PrintVisitor;
using ast::Program;
using backend::common::OffsetTable;
using base::ErrorList;
using base::FileSet;
using lexer::LexJoosFiles;
using lexer::StripSkippableTokens;
using lexer::Token;
using parser::Parse;
using types::ConstStringMap;
using types::TypeInfoMap;
using types::TypeSet;
using types::TypecheckProgram;
using weeder::WeedProgram;
namespace {
bool PrintErrors(const ErrorList& errors, ostream* err, const FileSet* fs) {
if (errors.Size() > 0) {
errors.PrintTo(err, base::OutputOptions::kUserOutput, fs);
}
return errors.IsFatal();
}
}
sptr<const Program> CompilerFrontend(CompilerStage stage, const FileSet* fs, TypeSet* typeset_out, TypeInfoMap* tinfo_out, ConstStringMap* string_map_out, ErrorList* err_out) {
// Lex files.
vector<vector<Token>> tokens;
LexJoosFiles(fs, &tokens, err_out);
if (err_out->IsFatal() || stage == CompilerStage::LEX) {
return nullptr;
}
// Strip err_out comments and whitespace.
vector<vector<Token>> filtered_tokens;
StripSkippableTokens(tokens, &filtered_tokens);
// Look for unsupported tokens.
FindUnsupportedTokens(tokens, err_out);
if (err_out->IsFatal() || stage == CompilerStage::UNSUPPORTED_TOKS) {
return nullptr;
}
// Parse.
sptr<const Program> program = Parse(fs, filtered_tokens, err_out);
if (err_out->IsFatal() || stage == CompilerStage::PARSE) {
return program;
}
// Weed.
program = WeedProgram(fs, program, err_out);
if (err_out->IsFatal() || stage == CompilerStage::WEED) {
return program;
}
// Type-checking.
program = TypecheckProgram(program, typeset_out, tinfo_out, string_map_out, err_out);
if (err_out->IsFatal() || stage == CompilerStage::TYPE_CHECK) {
return program;
}
// Add more implementation here.
return program;
}
bool CompilerBackend(CompilerStage stage, sptr<const ast::Program> prog, const string& dir, const TypeSet& typeset, const TypeInfoMap& tinfo_map, const ConstStringMap& string_map, const FileSet& fs, std::ostream* err) {
ir::Program ir_prog = ir::GenerateIR(prog, typeset, tinfo_map, string_map);
if (stage == CompilerStage::GEN_IR) {
return true;
}
// TODO: have a more generic backend mechanism.
// Generate type sizes, field offsets, and method offsets.
OffsetTable offset_table = OffsetTable::Build(tinfo_map, 4);
bool success = true;
backend::i386::Writer writer(tinfo_map, offset_table, ir_prog.rt_ids, fs);
for (const ir::CompUnit& comp_unit : ir_prog.units) {
string fname = dir + "/" + comp_unit.filename;
ofstream out(fname);
if (!out) {
// TODO: make error pretty.
*err << "Could not open output file: " << fname << "\n";
success = false;
continue;
}
writer.WriteCompUnit(comp_unit, &out);
out << std::flush;
}
vector<pair<string, function<void(ostream*)>>> writers;
writers.emplace_back(make_pair("strings.s", [&](ostream* out) {
writer.WriteConstStrings(string_map, out);
}));
writers.emplace_back(make_pair("main.s", [&](ostream* out) {
writer.WriteMain(out);
writer.WriteStaticInit(ir_prog, out);
}));
writers.emplace_back(make_pair("traces.s", [&](ostream* out) {
writer.WriteFileNames(out);
writer.WriteMethods(out);
}));
for (auto& p : writers) {
string fname = dir + "/" + p.first;
ofstream out(fname);
if (!out) {
// TODO: make error pretty.
*err << "Could not open output file: " << fname << "\n";
success = false;
break;
}
p.second(&out);
if (!(out << std::flush)) {
// TODO: make error pretty.
*err << "Could not write to output file: " << fname << "\n";
success = false;
break;
}
}
return success;
}
bool CompilerMain(CompilerStage stage, const vector<string>& files, ostream*, ostream* err) {
// Open files.
FileSet* fs = nullptr;
{
ErrorList errors;
FileSet::Builder builder;
// Runtime files.
builder.AddStringFile("__joos_internal__/TypeInfo.java", runtime::TypeInfoFile);
builder.AddStringFile("__joos_internal__/StringOps.java", runtime::StringOpsFile);
builder.AddStringFile("__joos_internal__/StackFrame.java", runtime::StackFrameFile);
builder.AddStringFile("__joos_internal__/Array.java", runtime::ArrayFile);
for (const auto& file : files) {
builder.AddDiskFile(file);
}
if (!builder.Build(&fs, &errors)) {
errors.PrintTo(&cerr, base::OutputOptions::kUserOutput, fs);
return false;
}
}
uptr<FileSet> fs_deleter(fs);
if (stage == CompilerStage::OPEN_FILES) {
return true;
}
ErrorList errors;
TypeInfoMap tinfo_map = TypeInfoMap::Empty();
TypeSet typeset = TypeSet::Empty();
ConstStringMap string_map;
sptr<const Program> program = CompilerFrontend(stage, fs, &typeset, &tinfo_map, &string_map, &errors);
if (PrintErrors(errors, err, fs)) {
return false;
}
if (stage <= CompilerStage::TYPE_CHECK) {
return true;
}
return CompilerBackend(stage, program, "output", typeset, tinfo_map, string_map, *fs, err);
}