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--!A cross-platform build utility based on Lua
--
-- Licensed under the Apache License, Version 2.0 (the "License");
-- you may not use this file except in compliance with the License.
-- You may obtain a copy of the License at
--
-- http://www.apache.org/licenses/LICENSE-2.0
--
-- Unless required by applicable law or agreed to in writing, software
-- distributed under the License is distributed on an "AS IS" BASIS,
-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-- See the License for the specific language governing permissions and
-- limitations under the License.
--
-- Copyright (C) 2015-present, TBOOX Open Source Group.
--
-- @author ruki
-- @file base64.lua
--
-- define module: base64
local base64 = base64 or {}
-- load modules
local io = require("base/io")
local utils = require("base/utils")
local bytes = require("base/bytes")
-- save metatable and builtin functions
base64._encode = base64._encode or base64.encode
base64._decode = base64._decode or base64.decode
-- decode base64 string to the data
--
-- @param base64str the base64 string
--
-- @return the data
--
function base64.decode(base64str)
local data = base64._decode(base64str)
if not data then
return nil, string.format("decode base64 failed")
end
return bytes(data)
end
-- encode data to the base64 string
--
-- @param data the data
--
-- @return the base64 string
--
function base64.encode(data)
if type(data) == "string" then
data = bytes(data)
end
local datasize = data:size()
local dataaddr = data:caddr()
local base64str, errors = base64._encode(dataaddr, datasize)
if not base64str then
return nil, errors or string.format("encode base64 failed")
end
return base64str
end
-- return module: base64
return base64
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