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// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
// This is a small C API inserted on top of the Binaryen C++ API which we use
// from Rust. Once we have a real linker for we'll be able to remove all this,
// and otherwise this is just all on a "as we need it" basis for now.
#include <stdint.h>
#include <string>
#include <sstream>
#include <stdlib.h>
#include "s2wasm.h"
#include "wasm-binary.h"
#include "wasm-linker.h"
using namespace wasm;
struct BinaryenRustModule {
BufferWithRandomAccess buffer;
std::string sourceMapJSON;
};
struct BinaryenRustModuleOptions {
uint64_t globalBase;
bool debug;
uint64_t stackAllocation;
uint64_t initialMem;
uint64_t maxMem;
bool importMemory;
bool ignoreUnknownSymbols;
bool debugInfo;
std::string startFunction;
std::string sourceMapUrl;
BinaryenRustModuleOptions() :
globalBase(0),
debug(false),
stackAllocation(0),
initialMem(0),
maxMem(0),
importMemory(false),
ignoreUnknownSymbols(false),
debugInfo(false),
startFunction(""),
sourceMapUrl("")
{}
};
extern "C" BinaryenRustModuleOptions*
BinaryenRustModuleOptionsCreate() {
return new BinaryenRustModuleOptions;
}
extern "C" void
BinaryenRustModuleOptionsFree(BinaryenRustModuleOptions *options) {
delete options;
}
extern "C" void
BinaryenRustModuleOptionsSetDebugInfo(BinaryenRustModuleOptions *options,
bool debugInfo) {
options->debugInfo = debugInfo;
}
extern "C" void
BinaryenRustModuleOptionsSetStart(BinaryenRustModuleOptions *options,
char *start) {
options->startFunction = start;
}
extern "C" void
BinaryenRustModuleOptionsSetSourceMapUrl(BinaryenRustModuleOptions *options,
char *sourceMapUrl) {
options->sourceMapUrl = sourceMapUrl;
}
extern "C" void
BinaryenRustModuleOptionsSetStackAllocation(BinaryenRustModuleOptions *options,
uint64_t stack) {
options->stackAllocation = stack;
}
extern "C" void
BinaryenRustModuleOptionsSetImportMemory(BinaryenRustModuleOptions *options,
bool import) {
options->importMemory = import;
}
extern "C" BinaryenRustModule*
BinaryenRustModuleCreate(const BinaryenRustModuleOptions *options,
const char *assembly) {
Linker linker(
options->globalBase,
options->stackAllocation,
options->initialMem,
options->maxMem,
options->importMemory,
options->ignoreUnknownSymbols,
options->startFunction,
options->debug);
S2WasmBuilder mainbuilder(assembly, options->debug);
linker.linkObject(mainbuilder);
linker.layout();
auto ret = make_unique<BinaryenRustModule>();
{
WasmBinaryWriter writer(&linker.getOutput().wasm, ret->buffer, options->debug);
writer.setNamesSection(options->debugInfo);
std::unique_ptr<std::ostringstream> sourceMapStream = nullptr;
{
sourceMapStream = make_unique<std::ostringstream>();
writer.setSourceMap(sourceMapStream.get(), options->sourceMapUrl);
}
// FIXME: support symbol maps?
// writer.setSymbolMap(symbolMap);
writer.write();
if (sourceMapStream) {
ret->sourceMapJSON = sourceMapStream->str();
}
}
return ret.release();
}
extern "C" const uint8_t*
BinaryenRustModulePtr(const BinaryenRustModule *M) {
return M->buffer.data();
}
extern "C" size_t
BinaryenRustModuleLen(const BinaryenRustModule *M) {
return M->buffer.size();
}
extern "C" const char*
BinaryenRustModuleSourceMapPtr(const BinaryenRustModule *M) {
return M->sourceMapJSON.data();
}
extern "C" size_t
BinaryenRustModuleSourceMapLen(const BinaryenRustModule *M) {
return M->sourceMapJSON.length();
}
extern "C" void
BinaryenRustModuleFree(BinaryenRustModule *M) {
delete M;
}
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