/************************************************************
*Copyright?（C）lcb0281at163.com?lcb0281atgmail.com
*FileName:?common.c
*BlogAddr:?https://blog.csdn.net/li_wen01
*Description:?
*Date:	???2019-06-22
*Author:???Caibiao?Lee
*Version:??V1.0
*Others:
*History:
***********************************************************/
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?“common.h“

static?const?char?base64digits[]?=
“ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/“;

#define?BAD?????-1??
#define?DECODE64（c）??（isascii（c）???base64val[c]?:?BAD）??
static?const?signed?char?base64val[]?=?
{
????BADBADBADBAD?BADBADBADBAD?BADBADBADBAD?BADBADBADBAD
????BADBADBADBAD?BADBADBADBAD?BADBADBADBAD?BADBADBADBAD
????BADBADBADBAD?BADBADBADBAD?BADBADBAD?62?BADBADBAD?63
????52?53?54?55??56?57?58?59??60?61BADBAD?BADBADBADBAD
????BAD??0??1??2???3??4??5??6???7??8??9?10??11?12?13?14
????15?16?17?18??19?20?21?22??23?24?25BAD?BADBADBADBAD
????BAD?26?27?28??29?30?31?32??33?34?35?36??37?38?39?40
????41?42?43?44??45?46?47?48??49?50?51BAD?BADBADBADBAD
};

void?COM_base64_bits_to_64（unsigned?char?*out?const?unsigned?char?*in?int?inlen）
{
????for?（;?inlen?>=?3;?inlen?-=?3）
????{
????????*out++?=?base64digits[in[0]?>>?2];
????????*out++?=?base64digits[（（in[0]?<>?4）];
????????*out++?=?base64digits[（（in[1]?<>?6）];
????????*out++?=?base64digits[in[2]?&?0x3f];
????????in?+=?3;
????}

????if?（inlen?>?0）
????{
????????unsigned?char?fragment;

????????*out++?=?base64digits[in[0]?>>?2];
????????fragment?=?（in[0]?<
????????if?（inlen?>?1）
????????????fragment?|=?in[1]?>>?4;

????????*out++?=?base64digits[fragment];
????????*out++?=?（inlen?se64digits[（in[1]?<????????*out++?=?‘=‘;
????}

????*out?=?‘\0‘;
}

int?COM_base64_64_to_bits（char?*out?const?char?*in）
{
????int?len?=?0;
????register?unsigned?char?digit1?digit2?digit3?digit4;

????if?（in[0]?==?‘+‘?&&?in[1]?==?‘?‘）
????????in?+=?2;
????if?（*in?==?‘\r‘）
????????return（0）;

????do?{
????????digit1?=?in[0];
????????if?（DECODE64（digit1）?==?BAD）
????????????return（-1）;
????????digit2?=?in[1];
????????if?（DECODE64（digit2）?==?BAD）
????????????return（-1）;
????????digit3?=?in[2];
????????if?（digit3?!=?‘=‘?&&?DECODE64（digit3）?==?BAD）
????????????return（-1）;
????????digit4?=?in[3];
????????if?（digit4?!=?‘=‘?&&?DECODE64（digit4）?==?BAD）
????????????return（-1）;
????????in?+=?4;
????????*out++?=?（DECODE64（digit1）?<>?4）;
????????++len;
????????if?（digit3?!=?‘=‘）
????????{
????????????*out++?=?（（DECODE64（digit2）?<