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/*
* Copyright 2015 WebAssembly Community Group participants
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
//
// wasm2js console tool
//
#include "support/colors.h"
#include "support/command-line.h"
#include "support/file.h"
#include "wasm-s-parser.h"
#include "wasm2js.h"
using namespace cashew;
using namespace wasm;
int main(int argc, const char *argv[]) {
Wasm2JSBuilder::Flags builderFlags;
Options options("wasm2js", "Transform .wasm/.wast files to asm.js");
options
.add("--output", "-o", "Output file (stdout if not specified)",
Options::Arguments::One,
[](Options* o, const std::string& argument) {
o->extra["output"] = argument;
Colors::disable();
})
.add("--allow-asserts", "", "Allow compilation of .wast testing asserts",
Options::Arguments::Zero,
[&](Options* o, const std::string& argument) {
builderFlags.allowAsserts = true;
o->extra["asserts"] = "1";
})
.add("--pedantic", "", "Emulate WebAssembly trapping behavior",
Options::Arguments::Zero,
[&](Options* o, const std::string& argument) {
builderFlags.pedantic = true;
})
.add_positional("INFILE", Options::Arguments::One,
[](Options *o, const std::string& argument) {
o->extra["infile"] = argument;
});
options.parse(argc, argv);
if (options.debug) builderFlags.debug = true;
Element* root;
Module wasm;
Ref asmjs;
try {
// If the input filename ends in `.wasm`, then parse it in binary form,
// otherwise assume it's a `*.wast` file and go from there.
//
// Note that we're not using the built-in `ModuleReader` which will also do
// similar logic here because when testing JS files we use the
// `--allow-asserts` flag which means we need to parse the extra
// s-expressions that come at the end of the `*.wast` file after the module
// is defined.
auto &input = options.extra["infile"];
std::string suffix(".wasm");
if (input.size() >= suffix.size() &&
input.compare(input.size() - suffix.size(), suffix.size(), suffix) == 0) {
ModuleReader reader;
reader.setDebug(options.debug);
reader.read(input, wasm, "");
if (options.debug) std::cerr << "asming..." << std::endl;
Wasm2JSBuilder wasm2js(builderFlags);
asmjs = wasm2js.processWasm(&wasm);
} else {
auto input(
read_file<std::vector<char>>(options.extra["infile"], Flags::Text, options.debug ? Flags::Debug : Flags::Release));
if (options.debug) std::cerr << "s-parsing..." << std::endl;
SExpressionParser parser(input.data());
root = parser.root;
if (options.debug) std::cerr << "w-parsing..." << std::endl;
SExpressionWasmBuilder builder(wasm, *(*root)[0]);
if (options.debug) std::cerr << "asming..." << std::endl;
Wasm2JSBuilder wasm2js(builderFlags);
asmjs = wasm2js.processWasm(&wasm);
if (options.extra["asserts"] == "1") {
if (options.debug) std::cerr << "asserting..." << std::endl;
flattenAppend(asmjs, wasm2js.processAsserts(&wasm, *root, builder));
}
}
} catch (ParseException& p) {
p.dump(std::cerr);
Fatal() << "error in parsing input";
} catch (std::bad_alloc&) {
Fatal() << "error in building module, std::bad_alloc (possibly invalid request for silly amounts of memory)";
}
if (options.debug) {
std::cerr << "a-printing..." << std::endl;
asmjs->stringify(std::cout, true);
std::cout << '\n';
}
if (options.debug) std::cerr << "j-printing..." << std::endl;
JSPrinter jser(true, true, asmjs);
jser.printAst();
Output output(options.extra["output"], Flags::Text, options.debug ? Flags::Debug : Flags::Release);
output << jser.buffer << std::endl;
if (options.debug) std::cerr << "done." << std::endl;
}
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