Pei Qing 卿培 edwardtoday

edwardtoday / backup-ghost-to-s3.sh

Last active May 5, 2017 19:20

Backup ghost blog related files to s3 bucket

	#!/bin/bash

	# create directories
	rm -rf /tmp/ghost-backup
	rm /tmp/ghost-backup*.tar.gz
	mkdir -p /tmp/ghost-backup/
	mkdir -p /tmp/ghost-backup/etc/
	mkdir -p /tmp/ghost-backup/etc/nginx/
	mkdir -p /tmp/ghost-backup/usr/local/etc/
	mkdir -p /tmp/ghost-backup/var/www/ghost/content/

edwardtoday / checksum.c

Created July 27, 2015 00:38

checksum

	/*
	* checksum.c
	*/

	#include "checksum.h"

	unsigned char do_checksum(const unsigned char *buf, size_t count)
	{
	unsigned char checksum = 0;
	size_t i;

edwardtoday / open_image.cpp

Last active August 29, 2015 14:04

MFC button handler to open and show an image.

	// Open image
	CString FilePathName;
	CFileDialog dlg(TRUE);///TRUE为OPEN对话框，FALSE为SAVE AS对话框

	if (dlg.DoModal() == IDOK) {
	FilePathName = dlg.GetPathName();
	GetDlgItem(IMAGE_FILENAME)->SetWindowText(FilePathName);
	CT2CA pszConvertedAnsiString(FilePathName);
	cv::Mat img = cv::imread(std::string(pszConvertedAnsiString),
	CV_LOAD_IMAGE_UNCHANGED);

edwardtoday / resolve.cpp

Created May 16, 2014 09:13

Slow TCP endpoint resolution

	// this is slow
	boost::asio::ip::tcp::resolver resolver1(io_);
	auto endpoint_iterator1 = resolver1.resolve({ "8.8.8.8", "53" });
	boost::asio::connect(socket_, endpoint_iterator1);

	// this is faster
	boost::asio::ip::tcp::resolver::query q(boost::asio::ip::tcp::v4(),
	"8.8.8.8",
	"53");
	auto endpoint_iterator2 = resolver2.resolve(q);

edwardtoday / gist:69772791d34678ee2c59

Created May 2, 2014 15:36

Fix partition table

edwardtoday / gist:426f50024acdb58002fb

Created May 2, 2014 14:32

Branch prediction code new

sum += data[c] * 100000;

edwardtoday / gist:4b774f96f056b42648a1

Created May 2, 2014 14:32

Branch prediction code orig

edwardtoday / gist:983aefcf84c8d0916390

Created May 2, 2014 14:31

Branch prediction ICC 14.0.1 with `-O2`:

edwardtoday / gist:8cf4433bda639b8713e4

Created May 2, 2014 14:30

Branch prediction GCC 4.8.2 with `-O2`:

edwardtoday / find_largest_rect.c

Last active August 29, 2015 13:57

Find largest rectangle for a new window in a canvas with some existing windows.

	#include <stdio.h>
	#include <stdlib.h>

	/**
	* @brief Find largest rectangle for a new window in a canvas with some existing windows.
	* @param width Canvas width in pixel
	* @param height Canvas height in pixel
	* @param objects Existing objects, in the form {{x_topleft,y_topleft,x_bottomright_y_bottomright},...}
	* @param num_objects Number of objects in previous parameter
	* @param output Array to store result as {x_topleft,y_topleft,x_bottomright_y_bottomright}