samuelyao314 samuelyao314

samuelyao314 / samizdat-shell-help.bash

Created July 17, 2020 11:49 — forked from kovetskiy/samizdat-shell-help.bash

	#!/bin/bash
	###
	### my-script — does one thing well
	###
	### Usage:
	### my-script <input> <output>
	###
	### Options:
	### <input> Input file to read.
	### <output> Output file to write. Use '-' for stdout.

samuelyao314 / snowflake.go

Created July 7, 2020 11:29 — forked from asyncins/snowflake.go

[snowflake-go]

samuelyao314 / next_pow.c

Created November 1, 2018 07:13

[ 一个 32bit 整数，取不小于它的 2 的整数次幂]

samuelyao314 / lua_hash.c

Created November 1, 2018 07:12

不错的字符串 hash 函数

	// 一个方便的 hash 函数应该散列的比较开，计算速度跟字符串长度关系不大，又不能只计算字符串的开头或末尾。这里的算法是从 Lua 中看来的。
	unsigned long hash(const char *name,size_t len)
	{
	unsigned long h=(unsigned long)len;
	size_t step = (len>>5)+1;
	for (size_t i=len; i>=step; i-=step)
	h = h ^ ((h<<5)+(h>>2)+(unsigned long)name[i-1]);
	return h;
	}

samuelyao314 / double2int.c

Created November 1, 2018 07:09

快速 double 转整型

	union luai_Cast { double l_d; long l_l; };
	#define lua_number2int(i,d) \
	{ volatile union luai_Cast u; u.l_d = (d) + 6755399441055744.0; (i) = u.l_l; }