forked from townforge/townforge
244 lines
6.8 KiB
C++
244 lines
6.8 KiB
C++
// Copyright (c) 2006-2013, Andrey N. Sabelnikov, www.sabelnikov.net
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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// * Neither the name of the Andrey N. Sabelnikov nor the
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// names of its contributors may be used to endorse or promote products
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// derived from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER BE LIABLE FOR ANY
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// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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#ifndef _STRING_CODING_H_
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#define _STRING_CODING_H_
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#include <string>
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namespace epee
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{
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namespace string_encoding
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{
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inline std::string convert_to_ansii(const std::wstring& str_from)
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{
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std::string res(str_from.begin(), str_from.end());
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return res;
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/*
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std::string result;
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std::locale loc;
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for(unsigned int i= 0; i < str_from.size(); ++i)
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{
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result += std::use_facet<std::ctype<wchar_t> >(loc).narrow(str_from[i]);
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}
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return result;
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*/
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//return boost::lexical_cast<std::string>(str_from);
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/*
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std::string str_trgt;
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if(!str_from.size())
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return str_trgt;
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int cb = ::WideCharToMultiByte( code_page, 0, str_from.data(), (__int32)str_from.size(), 0, 0, 0, 0 );
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if(!cb)
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return str_trgt;
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str_trgt.resize(cb);
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::WideCharToMultiByte( code_page, 0, str_from.data(), (int)str_from.size(),
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(char*)str_trgt.data(), (int)str_trgt.size(), 0, 0);
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return str_trgt;*/
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}
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inline std::string convert_to_ansii(const std::string& str_from)
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{
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return str_from;
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}
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inline std::wstring convert_to_unicode(const std::string& str_from)
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{
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std::wstring result;
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std::locale loc;
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for(unsigned int i= 0; i < str_from.size(); ++i)
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{
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result += std::use_facet<std::ctype<wchar_t> >(loc).widen(str_from[i]);
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}
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return result;
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//return boost::lexical_cast<std::wstring>(str_from);
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/*
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std::wstring str_trgt;
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if(!str_from.size())
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return str_trgt;
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int cb = ::MultiByteToWideChar( code_page, 0, str_from.data(), (int)str_from.size(), 0, 0 );
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if(!cb)
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return str_trgt;
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str_trgt.resize(cb);
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::MultiByteToWideChar( code_page, 0, str_from.data(),(int)str_from.size(),
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(wchar_t*)str_trgt.data(),(int)str_trgt.size());
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return str_trgt;*/
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}
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inline std::wstring convert_to_unicode(const std::wstring& str_from)
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{
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return str_from;
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}
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template<class target_string>
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inline target_string convert_to_t(const std::wstring& str_from);
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template<>
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inline std::string convert_to_t<std::string>(const std::wstring& str_from)
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{
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return convert_to_ansii(str_from);
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}
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template<>
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inline std::wstring convert_to_t<std::wstring>(const std::wstring& str_from)
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{
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return str_from;
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}
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template<class target_string>
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inline target_string convert_to_t(const std::string& str_from);
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template<>
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inline std::string convert_to_t<std::string>(const std::string& str_from)
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{
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return str_from;
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}
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template<>
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inline std::wstring convert_to_t<std::wstring>(const std::string& str_from)
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{
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return convert_to_unicode(str_from);
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}
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inline
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std::string& base64_chars()
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{
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static std::string chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
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"abcdefghijklmnopqrstuvwxyz"
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"0123456789+/";
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return chars;
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}
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inline
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std::string base64_encode(unsigned char const* bytes_to_encode, size_t in_len) {
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std::string ret;
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int i = 0;
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int j = 0;
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unsigned char char_array_3[3];
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unsigned char char_array_4[4];
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while (in_len--) {
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char_array_3[i++] = *(bytes_to_encode++);
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if (i == 3) {
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char_array_4[0] = (char_array_3[0] & 0xfc) >> 2;
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char_array_4[1] = ((char_array_3[0] & 0x03) << 4) + ((char_array_3[1] & 0xf0) >> 4);
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char_array_4[2] = ((char_array_3[1] & 0x0f) << 2) + ((char_array_3[2] & 0xc0) >> 6);
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char_array_4[3] = char_array_3[2] & 0x3f;
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for(i = 0; (i <4) ; i++)
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ret += base64_chars()[char_array_4[i]];
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i = 0;
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}
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}
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if (i)
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{
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for(j = i; j < 3; j++)
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char_array_3[j] = '\0';
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char_array_4[0] = (char_array_3[0] & 0xfc) >> 2;
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char_array_4[1] = ((char_array_3[0] & 0x03) << 4) + ((char_array_3[1] & 0xf0) >> 4);
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char_array_4[2] = ((char_array_3[1] & 0x0f) << 2) + ((char_array_3[2] & 0xc0) >> 6);
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char_array_4[3] = char_array_3[2] & 0x3f;
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for (j = 0; (j < i + 1); j++)
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ret += base64_chars()[char_array_4[j]];
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while((i++ < 3))
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ret += '=';
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}
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return ret;
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}
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inline
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std::string base64_encode(const std::string& str)
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{
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return base64_encode((unsigned char const* )str.data(), str.size());
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}
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inline bool is_base64(unsigned char c) {
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return (isalnum(c) || (c == '+') || (c == '/'));
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}
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inline
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std::string base64_decode(std::string const& encoded_string) {
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size_t in_len = encoded_string.size();
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size_t i = 0;
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size_t j = 0;
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size_t in_ = 0;
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unsigned char char_array_4[4], char_array_3[3];
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std::string ret;
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while (in_len-- && ( encoded_string[in_] != '=') && is_base64(encoded_string[in_])) {
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char_array_4[i++] = encoded_string[in_]; in_++;
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if (i ==4) {
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for (i = 0; i <4; i++)
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char_array_4[i] = (unsigned char)base64_chars().find(char_array_4[i]);
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char_array_3[0] = (char_array_4[0] << 2) + ((char_array_4[1] & 0x30) >> 4);
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char_array_3[1] = ((char_array_4[1] & 0xf) << 4) + ((char_array_4[2] & 0x3c) >> 2);
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char_array_3[2] = ((char_array_4[2] & 0x3) << 6) + char_array_4[3];
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for (i = 0; (i < 3); i++)
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ret += char_array_3[i];
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i = 0;
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}
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}
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if (i) {
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for (j = i; j <4; j++)
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char_array_4[j] = 0;
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for (j = 0; j <4; j++)
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char_array_4[j] = (unsigned char)base64_chars().find(char_array_4[j]);
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char_array_3[0] = (char_array_4[0] << 2) + ((char_array_4[1] & 0x30) >> 4);
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char_array_3[1] = ((char_array_4[1] & 0xf) << 4) + ((char_array_4[2] & 0x3c) >> 2);
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char_array_3[2] = ((char_array_4[2] & 0x3) << 6) + char_array_4[3];
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for (j = 0; (j < i - 1); j++) ret += char_array_3[j];
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}
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return ret;
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}
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}
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}
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#endif //_STRING_CODING_H_
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