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/*
* Copyright 2017 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.
*/
#include <cassert>
#include <cinttypes>
#include <cstdio>
#include <cstdlib>
#include "src/apply-names.h"
#include "src/binary-reader.h"
#include "src/binary-reader-ir.h"
#include "src/error-formatter.h"
#include "src/feature.h"
#include "src/generate-names.h"
#include "src/ir.h"
#include "src/option-parser.h"
#include "src/stream.h"
#include "src/validator.h"
#include "src/wast-lexer.h"
#include "src/c-writer.h"
using namespace wabt;
static int s_verbose;
static std::string s_infile;
static std::string s_outfile;
static Features s_features;
static WriteCOptions s_write_c_options;
static bool s_read_debug_names = true;
static std::unique_ptr<FileStream> s_log_stream;
static const char s_description[] =
R"( Read a file in the WebAssembly binary format, and convert it to
a C source file and header.
examples:
# parse binary file test.wasm and write test.c and test.h
$ wasm2c test.wasm -o test.c
# parse test.wasm, write test.c and test.h, but ignore the debug names, if any
$ wasm2c test.wasm --no-debug-names -o test.c
)";
static void ParseOptions(int argc, char** argv) {
OptionParser parser("wasm2c", s_description);
parser.AddOption('v', "verbose", "Use multiple times for more info", []() {
s_verbose++;
s_log_stream = FileStream::CreateStderr();
});
parser.AddOption(
'o', "output", "FILENAME",
"Output file for the generated C source file, by default use stdout",
[](const char* argument) {
s_outfile = argument;
ConvertBackslashToSlash(&s_outfile);
});
parser.AddOption(
'n', "modname", "MODNAME",
"Unique name for the module being generated. Each wasm sandboxed module in a single application should have a unique name.",
[](const char* argument) {
s_write_c_options.mod_name = argument;
});
s_features.AddOptions(&parser);
parser.AddOption("no-debug-names", "Ignore debug names in the binary file",
[]() { s_read_debug_names = false; });
parser.AddArgument("filename", OptionParser::ArgumentCount::One,
[](const char* argument) {
s_infile = argument;
ConvertBackslashToSlash(&s_infile);
});
parser.Parse(argc, argv);
// TODO(binji): currently wasm2c doesn't support any non-default feature
// flags.
bool any_non_default_feature = false;
#define WABT_FEATURE(variable, flag, default_, help) \
any_non_default_feature |= (s_features.variable##_enabled() != default_);
#include "src/feature.def"
#undef WABT_FEATURE
if (any_non_default_feature) {
fprintf(stderr, "wasm2c currently support only default feature flags.\n");
exit(1);
}
}
// TODO(binji): copied from binary-writer-spec.cc, probably should share.
static string_view strip_extension(string_view s) {
string_view ext = s.substr(s.find_last_of('.'));
string_view result = s;
if (ext == ".c")
result.remove_suffix(ext.length());
return result;
}
int ProgramMain(int argc, char** argv) {
Result result;
InitStdio();
ParseOptions(argc, argv);
std::vector<uint8_t> file_data;
result = ReadFile(s_infile.c_str(), &file_data);
if (Succeeded(result)) {
Errors errors;
Module module;
const bool kStopOnFirstError = true;
const bool kFailOnCustomSectionError = true;
ReadBinaryOptions options(s_features, s_log_stream.get(),
s_read_debug_names, kStopOnFirstError,
kFailOnCustomSectionError);
result = ReadBinaryIr(s_infile.c_str(), file_data.data(), file_data.size(),
options, &errors, &module);
if (Succeeded(result)) {
if (Succeeded(result)) {
ValidateOptions options(s_features);
result = ValidateModule(&module, &errors, options);
result |= GenerateNames(&module);
}
if (Succeeded(result)) {
/* TODO(binji): This shouldn't fail; if a name can't be applied
* (because the index is invalid, say) it should just be skipped. */
Result dummy_result = ApplyNames(&module);
WABT_USE(dummy_result);
}
if (Succeeded(result)) {
if (!s_outfile.empty()) {
std::string header_name =
strip_extension(s_outfile).to_string() + ".h";
FileStream c_stream(s_outfile.c_str());
FileStream h_stream(header_name);
result = WriteC(&c_stream, &h_stream, header_name.c_str(), &module,
s_write_c_options);
} else {
FileStream stream(stdout);
result =
WriteC(&stream, &stream, "wasm.h", &module, s_write_c_options);
}
}
}
FormatErrorsToFile(errors, Location::Type::Binary);
}
return result != Result::Ok;
}
int main(int argc, char** argv) {
WABT_TRY
return ProgramMain(argc, argv);
WABT_CATCH_BAD_ALLOC_AND_EXIT
}
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