iaoedsz2008

#include <iostream>
#include <chrono>

int main()
{
    auto start = std::chrono::high_resolution_clock::now ();
    /*
    do something...
    */
    auto end      = std::chrono::high_resolution_clock::now ();

iaoedsz2008

void hmac_sha512 (const unsigned char* input, int inputlength, unsigned char* output, unsigned int* outputlength)
{
    const EVP_MD* engine = EVP_sha512 ();

#if OPENSSL_VERSION_NUMBER < 0x10100000L
    HMAC_CTX ctx;
    HMAC_CTX_init (&ctx);
    HMAC_Init_ex (&ctx, API_SECRET, strlen (API_SECRET), engine, NULL);
    HMAC_Update (&ctx, (const unsigned char*)input, inputlength);
    HMAC_Final (&ctx, output, outputlength);

iaoedsz2008

void hmac_sha256 (const unsigned char* input, int inputlength, unsigned char* output, unsigned int* outputlength)
{
    const EVP_MD* engine = EVP_sha256 ();

#if OPENSSL_VERSION_NUMBER < 0x10100000L
    HMAC_CTX ctx;
    HMAC_CTX_init (&ctx);
    HMAC_Init_ex (&ctx, API_SECRET_KEY, strlen (API_SECRET_KEY), engine, NULL);
    HMAC_Update (&ctx, (const unsigned char*)input, inputlength);
    HMAC_Final (&ctx, output, outputlength);

iaoedsz2008

#include <openssl/bio.h>
#include <openssl/evp.h>
#include <openssl/buffer.h>

std::string base64_encode (const void* data, int len)
{
  std::string ret;
  BIO *       bio, *b64;
  BUF_MEM*    bufferPtr;

iaoedsz2008

@echo off

rem 使用前可以在注册表中添加项，以将此功能添加到文件夹的右键菜单
rem HKEY_CLASSES_ROOT\Directory\Background\shell\liaowuping\command
rem 并将默认值设置为此文件绝对路径

set Path=

rem cmake
set Path=%Path%;C:\Program Files\CMake\bin

iaoedsz2008

#include <iconv.h>
#include <localcharset.h>

static iconv_t g_utf8_to_localcharset;

static int init_iconv ()
{
  g_utf8_to_localcharset = NULL;
#if _WIN32
  const char* charset = locale_charset ();

iaoedsz2008

pragma solidity ^0.5.0;

interface IERC20 {

  function name () external view returns (string memory);

  function symbol () external view returns (string memory);

  function decimals () external view returns (uint8 );

iaoedsz2008

#include <openssl/md5.h>
#include <stdio.h>
#include <string.h>

int main(int argc, char *argv[]) {
  MD5_CTX c;

  unsigned char data[] = "your data";
  int len = strlen(data);
  unsigned char md5[MD5_DIGEST_LENGTH] = {0};

iaoedsz2008

echo 正在关闭资源管理器...

taskkill /f /im explorer.exe

echo 正在清理系统图标缓存数据库...

attrib -h -s -r "%userprofile%\AppData\Local\IconCache.db"

echo /f "%userprofile%\AppData\Local\IconCache.db"

iaoedsz2008

// hash 函数
struct sockaddr_in_hash
{
  size_t operator()(const sockaddr_in &addr) const
  {
    return *(size_t*)&(addr.sin_addr);
  }
};

// 每次查找时最少调用一次,hash值相同时可能调用2次或更多次.