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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 <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include "wasm-config.h"
#include "wasm-apply-names.h"
#include "wasm-ast.h"
#include "wasm-ast-parser.h"
#include "wasm-ast-writer.h"
#include "wasm-common.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 "wast-desugar"
static const char* s_infile;
static const char* s_outfile;
static WasmBool s_use_libc_allocator;
static WasmBool s_generate_names;
static WasmSourceErrorHandler s_error_handler =
WASM_SOURCE_ERROR_HANDLER_DEFAULT;
enum {
FLAG_HELP,
FLAG_OUTPUT,
FLAG_USE_LIBC_ALLOCATOR,
FLAG_GENERATE_NAMES,
NUM_FLAGS
};
static const char s_description[] =
" read a file in the wasm s-expression format and format it.\n"
"\n"
"examples:\n"
" # write output to stdout\n"
" $ wast-desugar test.wast\n"
"\n"
" # write output to test2.wast\n"
" $ wast-desugar test.wast -o test2.wast\n"
"\n"
" # generate names for indexed variables\n"
" $ wast-desugar --generate-names test.wast\n";
static WasmOption s_options[] = {
{FLAG_HELP, 'h', "help", NULL, WASM_OPTION_NO_ARGUMENT,
"print this help message"},
{FLAG_OUTPUT, 'o', "output", "FILE", WASM_OPTION_HAS_ARGUMENT,
"output file for the formatted file"},
{FLAG_USE_LIBC_ALLOCATOR, 0, "use-libc-allocator", NULL,
WASM_OPTION_NO_ARGUMENT,
"use malloc, free, etc. instead of stack allocator"},
{FLAG_GENERATE_NAMES, 0, "generate-names", NULL, WASM_OPTION_NO_ARGUMENT,
"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_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_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");
}
}
typedef struct Context {
WasmAllocator* allocator;
WasmMemoryWriter json_writer;
WasmMemoryWriter module_writer;
WasmStream json_stream;
WasmStringSlice output_filename_noext;
char* module_filename;
WasmResult result;
} Context;
int main(int argc, char** argv) {
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;
}
WasmAstLexer* lexer = wasm_new_ast_file_lexer(allocator, s_infile);
if (!lexer)
WASM_FATAL("unable to read %s\n", s_infile);
WasmScript script;
WasmResult result = wasm_parse_ast(lexer, &script, &s_error_handler);
if (WASM_SUCCEEDED(result)) {
WasmModule* module = wasm_get_first_module(&script);
if (!module)
WASM_FATAL("no module in file.\n");
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);
}
}
}
wasm_destroy_ast_lexer(lexer);
if (s_use_libc_allocator)
wasm_destroy_script(&script);
wasm_print_allocator_stats(allocator);
wasm_destroy_allocator(allocator);
return result;
}
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