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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.
*/
//
// Command line helpers.
//
#ifndef wasm_command_line_h
#define wasm_command_line_h
#include "wasm.h"
namespace wasm {
struct Options {
// standard options
bool debug;
std::string infile;
std::string outfile;
// extra options
std::map<std::string, const char*> extra;
Options() : debug(false) {}
};
bool optionIs(const char *arg, const char *LongOpt, const char *ShortOpt) {
return strcmp(arg, LongOpt) == 0 || strcmp(arg, ShortOpt) == 0;
}
// TODO(jfb) Make this configurable: callers should pass in option handlers.
void processCommandLine(int argc, const char *argv[], Options *options, const char *help) {
assert(argc > 0 && "expect at least program name as an argument");
for (size_t i = 1, e = argc; i != e; ++i) {
if (optionIs(argv[i], "--help", "-h")) {
std::cerr << help;
exit(EXIT_SUCCESS);
} else if (optionIs(argv[i], "--debug", "-d")) {
options->debug = true;
} else if (optionIs(argv[i], "--output", "-o")) {
if (i + 1 == e) {
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 (argv[i][0] == '-' && argv[i][1] == '-') {
size_t j = 2;
std::string name;
while (argv[i][j] && argv[i][j] != '=') {
name += argv[i][j];
j++;
}
options->extra[name] = argv[i][j] == '=' ? &argv[i][j+1] : "(no value)";
} 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
#endif // wasm_command_line_h
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