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/*
* Copyright 2016 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 <assert.h>
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include "wasm-allocator.h"
#include "wasm-apply-names.h"
#include "wasm-ast.h"
#include "wasm-ast-writer.h"
#include "wasm-binary-reader.h"
#include "wasm-binary-reader-ast.h"
#include "wasm-generate-names.h"
#include "wasm-option-parser.h"
#include "wasm-stack-allocator.h"
#include "wasm-stream.h"
#include "wasm-writer.h"
#define PROGRAM_NAME "wasm2wast"
static int s_verbose;
static const char* s_infile;
static const char* s_outfile;
static WasmReadBinaryOptions s_read_binary_options =
WASM_READ_BINARY_OPTIONS_DEFAULT;
static WasmBool s_use_libc_allocator;
static WasmBool s_generate_names;
static WasmBinaryErrorHandler s_error_handler =
WASM_BINARY_ERROR_HANDLER_DEFAULT;
static WasmFileWriter s_log_stream_writer;
static WasmStream s_log_stream;
#define NOPE WASM_OPTION_NO_ARGUMENT
#define YEP WASM_OPTION_HAS_ARGUMENT
enum {
FLAG_VERBOSE,
FLAG_HELP,
FLAG_OUTPUT,
FLAG_USE_LIBC_ALLOCATOR,
FLAG_DEBUG_NAMES,
FLAG_GENERATE_NAMES,
NUM_FLAGS
};
static const char s_description[] =
" read a file in the wasm binary format, and convert it to the wasm\n"
" s-expression file format.\n"
"\n"
"examples:\n"
" # parse binary file test.wasm and write s-expression file test.wast\n"
" $ wasm2wast test.wasm -o test.wast\n"
"\n"
" # parse test.wasm and write test.wast, using the debug names, if any\n"
" $ wasm2wast test.wasm --debug-names -o test.wast\n";
static WasmOption s_options[] = {
{FLAG_VERBOSE, 'v', "verbose", NULL, NOPE,
"use multiple times for more info"},
{FLAG_HELP, 'h', "help", NULL, NOPE, "print this help message"},
{FLAG_OUTPUT, 'o', "output", "FILENAME", YEP,
"output file for the generated wast file, by default use stdout"},
{FLAG_USE_LIBC_ALLOCATOR, 0, "use-libc-allocator", NULL, NOPE,
"use malloc, free, etc. instead of stack allocator"},
{FLAG_DEBUG_NAMES, 0, "debug-names", NULL, NOPE,
"Read debug names from the binary file"},
{FLAG_GENERATE_NAMES, 0, "generate-names", NULL, NOPE,
"Give auto-generated names to non-named functions, types, etc."},
};
WASM_STATIC_ASSERT(NUM_FLAGS == WASM_ARRAY_SIZE(s_options));
static void on_option(struct WasmOptionParser* parser,
struct WasmOption* option,
const char* argument) {
switch (option->id) {
case FLAG_VERBOSE:
s_verbose++;
wasm_init_file_writer_existing(&s_log_stream_writer, stdout);
wasm_init_stream(&s_log_stream, &s_log_stream_writer.base, NULL);
s_read_binary_options.log_stream = &s_log_stream;
break;
case FLAG_HELP:
wasm_print_help(parser, PROGRAM_NAME);
exit(0);
break;
case FLAG_OUTPUT:
s_outfile = argument;
break;
case FLAG_USE_LIBC_ALLOCATOR:
s_use_libc_allocator = WASM_TRUE;
break;
case FLAG_DEBUG_NAMES:
s_read_binary_options.read_debug_names = WASM_TRUE;
break;
case FLAG_GENERATE_NAMES:
s_generate_names = WASM_TRUE;
break;
}
}
static void on_argument(struct WasmOptionParser* parser, const char* argument) {
s_infile = argument;
}
static void on_option_error(struct WasmOptionParser* parser,
const char* message) {
WASM_FATAL("%s\n", message);
}
static void parse_options(int argc, char** argv) {
WasmOptionParser parser;
WASM_ZERO_MEMORY(parser);
parser.description = s_description;
parser.options = s_options;
parser.num_options = WASM_ARRAY_SIZE(s_options);
parser.on_option = on_option;
parser.on_argument = on_argument;
parser.on_error = on_option_error;
wasm_parse_options(&parser, argc, argv);
if (!s_infile) {
wasm_print_help(&parser, PROGRAM_NAME);
WASM_FATAL("No filename given.\n");
}
}
int main(int argc, char** argv) {
WasmResult result;
WasmStackAllocator stack_allocator;
WasmAllocator* allocator;
wasm_init_stdio();
parse_options(argc, argv);
if (s_use_libc_allocator) {
allocator = &g_wasm_libc_allocator;
} else {
wasm_init_stack_allocator(&stack_allocator, &g_wasm_libc_allocator);
allocator = &stack_allocator.allocator;
}
void* data;
size_t size;
result = wasm_read_file(allocator, s_infile, &data, &size);
if (WASM_SUCCEEDED(result)) {
WasmModule module;
WASM_ZERO_MEMORY(module);
result = wasm_read_binary_ast(allocator, data, size, &s_read_binary_options,
&s_error_handler, &module);
if (WASM_SUCCEEDED(result)) {
if (s_generate_names)
result = wasm_generate_names(allocator, &module);
if (WASM_SUCCEEDED(result))
result = wasm_apply_names(allocator, &module);
if (WASM_SUCCEEDED(result)) {
WasmFileWriter file_writer;
if (s_outfile) {
result = wasm_init_file_writer(&file_writer, s_outfile);
} else {
wasm_init_file_writer_existing(&file_writer, stdout);
}
if (WASM_SUCCEEDED(result)) {
result = wasm_write_ast(allocator, &file_writer.base, &module);
wasm_close_file_writer(&file_writer);
}
}
}
if (s_use_libc_allocator)
wasm_destroy_module(allocator, &module);
wasm_free(allocator, data);
wasm_print_allocator_stats(allocator);
wasm_destroy_allocator(allocator);
}
return result;
}
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