/*
base64.cpp?and?base64.h

Copyright?（C）?2004-2008?René?Nyffenegger

This?source?code?is?provided?‘as-is‘?without?any?express?or?implied
warranty.?In?no?event?will?the?author?be?held?liable?for?any?damages
arising?from?the?use?of?this?software.

Permission?is?granted?to?anyone?to?use?this?software?for?any?purpose
including?commercial?applications?and?to?alter?it?and?redistribute?it
freely?subject?to?the?following?restrictions:

1.?The?origin?of?this?source?code?must?not?be?misrepresented;?you?must?not
claim?that?you?wrote?the?original?source?code.?If?you?use?this?source?code
in?a?product?an?acknowledgment?in?the?product?documentation?would?be
appreciated?but?is?not?required.

2.?Altered?source?versions?must?be?plainly?marked?as?such?and?must?not?be
misrepresented?as?being?the?original?source?code.

3.?This?notice?may?not?be?removed?or?altered?from?any?source?distribution.

René?Nyffenegger?rene.nyffenegger@adp-gmbh.ch

*/
#include?“base64.h“
#include?

static?const?std::string?base64_chars?=
“ABCDEFGHIJKLMNOPQRSTUVWXYZ“
“abcdefghijklmnopqrstuvwxyz“
“0123456789+/“;


static?inline?bool?is_base64（unsigned?char?c）?{
	return?（isalnum（c）?||?（c?==?‘+‘）?||?（c?==?‘/‘））;
}

std::string?base64_encode（unsigned?char?const*?bytes_to_encode?unsigned?int?in_len）?{
	std::string?ret;
	int?i?=?0;
	int?j?=?0;
	unsigned?char?char_array_3[3];
	unsigned?char?char_array_4[4];

	while?（in_len--）?{
		char_array_3[i++]?=?*（bytes_to_encode++）;
		if?（i?==?3）?{
			char_array_4[0]?=?（char_array_3[0]?&?0xfc）?>>?2;
			char_array_4[1]?=?（（char_array_3[0]?&?0x03）?<>?4）;
			char_array_4[2]?=?（（char_array_3[1]?&?0x0f）?<>?6）;
			char_array_4[3]?=?char_array_3[2]?&?0x3f;

			for?（i?=?0;?（i?<4）;?i++）
				ret?+=?base64_chars[char_array_4[i]];
			i?=?0;
		}
	}

	if?（i）
	{
		for?（j?=?i;?j?			char_array_3[j]?=?‘\0‘;

		char_array_4[0]?=?（char_array_3[0]?&?0xfc）?>>?2;
		char_array_4[1]?=?（（char_array_3[0]?&?0x03）?<>?4）;
		char_array_4[2]?=?（（char_array_3[1]?&?0x0f）?<>?6）;
		char_array_4[3]?=?char_array_3[2]?&?0x3f;

		for?（j?=?0;?（j?			ret?+=?base64_chars[char_array_4[j]];

		while?（（i++?			ret?+=?‘=‘;

	}

	return?ret;

}

std::string?base64_decode（std::string?const&?encoded_string）?{
	int?in_len?=?encoded_string.size（）;
	int?i?=?0;
	int?j?=?0;
	int?in_?=?0;
	unsigned?char?char_array_4[4]?char_array_3[3];
	std::string?ret;

	while?（in_len--?&&?（encoded_string[in_]?!=?‘=‘）?&&?is_base64（encoded_string[in_]））?{
		char_array_4[i++]?=?encoded_string[in_];?in_++;
		if?（i?==?4）?{
			for?（i?=?0;?i?<4;?i++）
				char_array_4[i]?=?base64_chars.find（char_array_4[i]）;

			char_array_3[0]?=?（char_array_4[0]?<>?4）;
			char_array_3[1]?=?（（char_array_4[1]?&?0xf）?<>?2）;
			char_array_3[2]?=?（（char_array_4[2]?&?0x3）?<
			for?（i?=?0;?（

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2014-09-11?06:00??btcchina-api-cpp-master\
?????文件????????2939??2014-09-11?06:00??btcchina-api-cpp-master\.gitignore
?????目錄???????????0??2014-09-11?06:00??btcchina-api-cpp-master\api_by_http\
?????文件???????11226??2014-09-11?06:00??btcchina-api-cpp-master\api_by_http\BTCChinaAPI.cpp
?????文件????????2425??2014-09-11?06:00??btcchina-api-cpp-master\api_by_http\BTCChinaAPI.h
?????文件????????1531??2014-09-11?06:00??btcchina-api-cpp-master\api_by_http\HMAC_SHA1.cpp
?????文件????????1017??2014-09-11?06:00??btcchina-api-cpp-master\api_by_http\HMAC_SHA1.h
?????文件????????6109??2014-09-11?06:00??btcchina-api-cpp-master\api_by_http\README.md
?????文件????????7307??2014-09-11?06:00??btcchina-api-cpp-master\api_by_http\SHA1.cpp
?????文件????????3645??2014-09-11?06:00??btcchina-api-cpp-master\api_by_http\SHA1.h
?????文件????????3513??2014-09-11?06:00??btcchina-api-cpp-master\api_by_http\base64.cpp
?????文件?????????134??2014-09-11?06:00??btcchina-api-cpp-master\api_by_http\base64.h
?????文件?????????796??2014-09-11?06:00??btcchina-api-cpp-master\api_by_http\cpp-wrapper.cpp
?????文件?????????973??2014-09-11?06:00??btcchina-api-cpp-master\api_by_http\cpp-wrapper.sln
?????文件????????4748??2014-09-11?06:00??btcchina-api-cpp-master\api_by_http\cpp-wrapper.vcxproj
?????文件????????1849??2014-09-11?06:00??btcchina-api-cpp-master\api_by_http\cpp-wrapper.vcxproj.filters
?????文件?????????308??2014-09-11?06:00??btcchina-api-cpp-master\api_by_http\makefile
?????目錄???????????0??2014-09-11?06:00??btcchina-api-cpp-master\api_by_socketio\
?????文件??????????13??2014-09-11?06:00??btcchina-api-cpp-master\api_by_socketio\.gitignore
?????文件????????1345??2014-09-11?06:00??btcchina-api-cpp-master\api_by_socketio\README.md
?????文件?????????225??2014-09-11?06:00??btcchina-api-cpp-master\api_by_socketio\sample.cpp
?????文件????????5888??2014-09-11?06:00??btcchina-api-cpp-master\api_by_socketio\socketio.cpp
?????文件????????1470??2014-09-11?06:00??btcchina-api-cpp-master\api_by_socketio\socketio.hpp