Shikugawa

int main() {
    auto mod = wasmparser::Parser::doParse("../testdata/fibonacci.wasm");
    std::cout << mod.code_sec.size << std::endl;
    auto decoder = wasmparser::InstructionDecoder(&mod);
//    using Byte = unsigned char;
//  {
//    Byte buf1[1] = {0x04};
//    uint32_t a;
//    wasmparser::decodeULEB128(&buf1[0], &buf1[0], &a);
//    std::cout << a << std::endl;

Shikugawa

#include <iostream>

int main() {
  int a = 0;
  int l = 1;
  printf("%i | ", l);
  for (auto s : cs->value.elem) {
    printf("0x%.2x ", s);
    if (a == 7) {
      std::cout << std::endl;

Shikugawa

enum class InstructionSymbol : Byte {
  // ==== Control Instructions ====
  UNREACHABLE = 0x00,
  NOP = 0x01,
  BLOCK = 0x02,
  LOOP = 0x03,
  IF = 0x04,
  ELSE = 0x05,
  END = 0x0B,
  BR = 0x0C,

Shikugawa

# <op> ::= + | - | *
# <number> ::= 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9
# <factor> ::= <number> | '(' <expr> ')'
# <expr> ::= <factor> [<op> <factor>]*
class Parser():
  def __init__(self, eq):
    self.idx = 0
    self.eq = list(eq)
    self.nums = list("0123456789")
    self.op = list("+-*")

Shikugawa

package main

import (
	"fmt"
	"sync"
	"time"
)

type PubSub struct {
	mux sync.RWMutex

Shikugawa

#include <algorithm>
#include <array>
#include <cassert>
#include <cstddef>
#include <iostream>
#include <optional>
#include <ostream>
#include <set>
#include <vector>

Shikugawa

#include <iostream>
#include <string>
#include <vector>

class Record {
public:
  // continueフラグは、msecに変換する際、初期値から換算するか否かを区別するのに用いる
  Record(const std::string &record_str) : record_str_(record_str) {
    parse();
    calculateTimestamp();

Shikugawa

use std::cmp;

fn main() {
    let base: &str = "kitten";
    let changed: &str = "sitting";
    let mut dp: Vec<Vec<i8>> = vec![];
    let x_len: usize = base.len() + 1;
    let y_len: usize = changed.len() + 1;
    for _ in 0..y_len {
        let elem: Vec<i8> = vec![-1; x_len];

Shikugawa

Introduction

SWIG can generate interface for other languages to call C++ functions. If C++ codes are separeted to mutiple directories, we may have some trouble.

Build Flow

1. Prepare directories like this.

- invoke
 - invoke.cpp

Shikugawa

static_resources:
      listeners:
        - address:
            socket_address:
              address: 0.0.0.0
              port_value: 8000
          filter_chains:
            - filters:
                - name: envoy.http_connection_manager
                  typed_config: