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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.
*/
//
// wasm2asm console tool
//
#include "s2wasm.h"
using namespace cashew;
using namespace wasm;
namespace wasm {
struct Options {
bool debug;
std::string infile;
std::string outfile;
Options() : debug(false) {}
};
bool optionIs(const char *arg, const char *LongOpt, const char *ShortOpt) {
return strcmp(arg, LongOpt) == 0 || strcmp(arg, ShortOpt) == 0;
}
void processCommandLine(int argc, const char *argv[], Options *options) {
for (size_t i = 1; i != argc; ++i) {
if (optionIs(argv[i], "--help", "-h")) {
std::cerr << "s2wasm INFILE\n\n"
"Link .s file into .wast\n\n"
"Optional arguments:\n"
" -n, --help Show this help message and exit\n"
" -d, --debug Print debug information to stderr\n"
" -o, --output Output file (stdout if not specified)\n"
<< std::endl;
exit(EXIT_SUCCESS);
} else if (optionIs(argv[i], "--debug", "-d")) {
options->debug = true;
} else if (optionIs(argv[i], "--output", "-o")) {
if (i + 1 == argc) {
std::cerr << "No output file" << std::endl;
exit(EXIT_FAILURE);
}
if (options->outfile.size()) {
std::cerr << "Expected only one output file, got '" << options->outfile
<< "' and '" << argv[i] << "'" << std::endl;
exit(EXIT_FAILURE);
}
options->outfile = argv[++i];
} else {
if (options->infile.size()) {
std::cerr << "Expected only one input file, got '" << options->infile
<< "' and '" << argv[i] << "'" << std::endl;
exit(EXIT_FAILURE);
}
options->infile = argv[i];
}
}
}
} // namespace wasm
int main(int argc, const char *argv[]) {
Options options;
processCommandLine(argc, argv, &options);
std::string input;
{
if (options.debug)
std::cerr << "Loading '" << options.infile << "'..." << std::endl;
std::ifstream infile(options.infile);
if (!infile.is_open()) {
std::cerr << "Failed opening '" << options.infile << "'" << std::endl;
exit(EXIT_FAILURE);
}
infile.seekg(0, std::ios::end);
size_t insize = infile.tellg();
input.resize(insize + 1);
infile.seekg(0);
infile.read(&input[0], insize);
}
std::streambuf *buffer;
std::ofstream outfile;
if (options.outfile.size()) {
if (options.debug) std::cerr << "Opening '" << options.outfile << std::endl;
outfile.open(options.outfile, std::ofstream::out | std::ofstream::trunc);
if (!outfile.is_open()) {
std::cerr << "Failed opening '" << options.outfile << "'" << std::endl;
exit(EXIT_FAILURE);
}
buffer = outfile.rdbuf();
} else {
buffer = std::cout.rdbuf();
}
std::ostream out(buffer);
if (options.debug) std::cerr << "Parsing and wasming..." << std::endl;
AllocatingModule wasm;
S2WasmBuilder s2wasm(wasm, input.c_str(), options.debug);
if (options.debug) std::cerr << "Emscripten gluing..." << std::endl;
std::stringstream meta;
s2wasm.emscriptenGlue(meta);
if (options.debug) std::cerr << "Printing..." << std::endl;
out << wasm << meta.str() << std::endl;
if (options.debug) std::cerr << "Done." << std::endl;
}
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