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// -*- C++ -*-
// Copyright (C) 2014-2017, Gabriel Dos Reis.
// All rights reserved.
// Written by Gabriel Dos Reis.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// - Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// - Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in
// the documentation and/or other materials provided with the
// distribution.
//
// - Neither the name of OpenAxiom. nor the names of its contributors
// may be used to endorse or promote products derived from this
// software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
// IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
// PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
// OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include <iostream>
#include <fstream>
#include <vector>
#include <string>
#include <stack>
#include <iterator>
#include <ctype.h>
#include <open-axiom/diagnostics>
#include <open-axiom/InputFragment>
#include <open-axiom/SourceInput>
#include <open-axiom/token>
#include <open-axiom/Parser>
namespace {
using namespace OpenAxiom;
using TokenSequence = TokenStream<Token>;
struct ParsingContext {
explicit ParsingContext(TokenSequence& ts)
: tokens{ ts }, position{ }
{ }
bool exhausted() const {
return position >= tokens.size();
}
const Token* current_token() const {
if (exhausted())
return nullptr;
return &tokens[position];
}
void advance() { ++position; }
private:
TokenSequence& tokens;
TokenSequence::size_type position;
};
const Token* next_token(ParsingContext& ctx) {
while (auto t = ctx.current_token()) {
switch (t->category) {
case TokenCategory::Whitespace:
break;
case TokenCategory::Comment:
if (t->value == TokenValue::Wisecrack)
break;
default:
return t;
}
ctx.advance();
}
return nullptr;
}
// Simple wrapper around standard file streams, along with the pathname
// to the file.
template<typename T>
struct FileAs {
const char* path;
T stream;
FileAs(const char* p, std::ios_base::openmode flags)
: path{ p }, stream{ p, flags }
{
if (!stream)
throw Error::CannotOpenFile{ path };
}
};
using InputFile = FileAs<std::ifstream>;
using OutputFile = FileAs<std::ofstream>;
void format_text(const Fragment& f, const Token& t, std::ostream& os) {
if (t.start.line == t.end.line) {
auto& line = f(t.start);
std::copy(line.begin() + t.start.column, line.begin() + t.end.column,
std::ostream_iterator<char>(os));
}
else {
auto& first_line = f(t.start);
std::copy(first_line.begin() + t.start.column, first_line.end(),
std::ostream_iterator<char>(os));
for (auto i = t.start.line + 1; i < t.end.line; ++i)
os << f[i];
auto& last_line = f[t.end.line];
std::copy(last_line.begin(), last_line.begin() + t.end.column,
std::ostream_iterator<char>(os));
}
}
void format_token(const Fragment& f, const Token& t, std::ostream& os) {
os << t.category << '{'
<< t.start << '-' << t.end
<< ", ";
switch (t.category) {
case TokenCategory::Integer:
case TokenCategory::FloatingPoint:
case TokenCategory::String:
case TokenCategory::Identifier:
format_text(f, t, os);
break;
default:
os << t.value;
break;
}
os << '}';
}
// FIXME: This is just a stub to get a native parsing entry point
// into the bootsys and interpsys images.
void transpile_boot_to_lisp(InputFile& in, OutputFile& out) {
out.stream << "## Input: " << in.path << '\n'
<< "## Output: " << out.path << '\n';
SourceInput src { in.stream };
while (auto f = src.get()) {
out.stream << "================================================\n";
out.stream << f;
try {
TokenSequence ts { f, Language::Boot };
for (auto& t : ts) {
out.stream << '\t';
format_token(f, t, out.stream);
switch (t.category) {
case TokenCategory::Junk:
case TokenCategory::Unclassified:
out.stream //<< f[t.start.line].sub_string(t.start.column, t.end.column)
<< " in file " << in.path
<< " at line " << t.start.line
<< ", column " << t.start.column;
break;
default:
break;
}
out.stream << '\n';
}
}
catch(const EndOfStringUnseen& e) {
std::cerr << in.path << ": syntax error: "
<< "premature end of line before matching quote "
<< "of string literal on line " << e.line
<< " at column " << e.column
<< std::endl;
}
catch (const MissingExponent& e) {
std::cerr << in.path << ": syntax error: "
<< "missing exponent of floating point constant "
<< "on line " << e.line
<< ", column " << e.column
<< std::endl;
}
out.stream << "================================================\n";
}
out.stream << std::flush;
}
}
namespace OpenAxiom {
int boot_to_lisp(const char* boot_path, const char* lisp_path) try {
InputFile in { boot_path, std::ios_base::binary };
OutputFile out { lisp_path, std::ios_base::binary };
transpile_boot_to_lisp(in, out);
return 0;
}
catch (const Error::CannotOpenFile& e) {
Diagnostics::StandardStream diagnostics { };
diagnostics.error() << "error: could not open file `"
<< e.path << "'\n";
return -1;
}
}
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