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// Copyright (c) 2014, The Monero Project
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this list of
// conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
// of conditions and the following disclaimer in the documentation and/or other
// materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its contributors may be
// used to endorse or promote products derived from this software without specific
// prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Parts of this file are originally copyright (c) 2006-2013, Andrey N. Sabelnikov
#ifndef _STRING_CODING_H_
#define _STRING_CODING_H_
#include <string>
//#include "md5_l.h"
namespace epee
{
namespace string_encoding
{
inline std::string convert_to_ansii(const std::wstring& str_from)
{
std::string res(str_from.begin(), str_from.end());
return res;
/*
std::string result;
std::locale loc;
for(unsigned int i= 0; i < str_from.size(); ++i)
{
result += std::use_facet<std::ctype<wchar_t> >(loc).narrow(str_from[i]);
}
return result;
*/
//return boost::lexical_cast<std::string>(str_from);
/*
std::string str_trgt;
if(!str_from.size())
return str_trgt;
int cb = ::WideCharToMultiByte( code_page, 0, str_from.data(), (__int32)str_from.size(), 0, 0, 0, 0 );
if(!cb)
return str_trgt;
str_trgt.resize(cb);
::WideCharToMultiByte( code_page, 0, str_from.data(), (int)str_from.size(),
(char*)str_trgt.data(), (int)str_trgt.size(), 0, 0);
return str_trgt;*/
}
#ifdef WINDOWS_PLATFORM_EX
inline std::string convert_to_ansii_win(const std::wstring& str_from)
{
int code_page = CP_ACP;
std::string str_trgt;
if(!str_from.size())
return str_trgt;
int cb = ::WideCharToMultiByte( code_page, 0, str_from.data(), (__int32)str_from.size(), 0, 0, 0, 0 );
if(!cb)
return str_trgt;
str_trgt.resize(cb);
::WideCharToMultiByte( code_page, 0, str_from.data(), (int)str_from.size(),
(char*)str_trgt.data(), (int)str_trgt.size(), 0, 0);
return str_trgt;
}
#endif
inline std::string convert_to_ansii(const std::string& str_from)
{
return str_from;
}
inline std::wstring convert_to_unicode(const std::string& str_from)
{
std::wstring result;
std::locale loc;
for(unsigned int i= 0; i < str_from.size(); ++i)
{
result += std::use_facet<std::ctype<wchar_t> >(loc).widen(str_from[i]);
}
return result;
//return boost::lexical_cast<std::wstring>(str_from);
/*
std::wstring str_trgt;
if(!str_from.size())
return str_trgt;
int cb = ::MultiByteToWideChar( code_page, 0, str_from.data(), (int)str_from.size(), 0, 0 );
if(!cb)
return str_trgt;
str_trgt.resize(cb);
::MultiByteToWideChar( code_page, 0, str_from.data(),(int)str_from.size(),
(wchar_t*)str_trgt.data(),(int)str_trgt.size());
return str_trgt;*/
}
inline std::wstring convert_to_unicode(const std::wstring& str_from)
{
return str_from;
}
template<class target_string>
inline target_string convert_to_t(const std::wstring& str_from);
template<>
inline std::string convert_to_t<std::string>(const std::wstring& str_from)
{
return convert_to_ansii(str_from);
}
template<>
inline std::wstring convert_to_t<std::wstring>(const std::wstring& str_from)
{
return str_from;
}
template<class target_string>
inline target_string convert_to_t(const std::string& str_from);
template<>
inline std::string convert_to_t<std::string>(const std::string& str_from)
{
return str_from;
}
template<>
inline std::wstring convert_to_t<std::wstring>(const std::string& str_from)
{
return convert_to_unicode(str_from);
}
inline
std::string& base64_chars()
{
static std::string chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
"abcdefghijklmnopqrstuvwxyz"
"0123456789+/";
return chars;
}
inline
std::string base64_encode(unsigned char const* bytes_to_encode, size_t 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_3[1] & 0xf0) >> 4);
char_array_4[2] = ((char_array_3[1] & 0x0f) << 2) + ((char_array_3[2] & 0xc0) >> 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 < 3; 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_3[1] & 0xf0) >> 4);
char_array_4[2] = ((char_array_3[1] & 0x0f) << 2) + ((char_array_3[2] & 0xc0) >> 6);
char_array_4[3] = char_array_3[2] & 0x3f;
for (j = 0; (j < i + 1); j++)
ret += base64_chars()[char_array_4[j]];
while((i++ < 3))
ret += '=';
}
return ret;
}
inline
std::string base64_encode(const std::string& str)
{
return base64_encode((unsigned char const* )str.data(), str.size());
}
inline bool is_base64(unsigned char c) {
return (isalnum(c) || (c == '+') || (c == '/'));
}
inline
std::string base64_decode(std::string const& encoded_string) {
size_t in_len = encoded_string.size();
size_t i = 0;
size_t j = 0;
size_t 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] = (unsigned char)base64_chars().find(char_array_4[i]);
char_array_3[0] = (char_array_4[0] << 2) + ((char_array_4[1] & 0x30) >> 4);
char_array_3[1] = ((char_array_4[1] & 0xf) << 4) + ((char_array_4[2] & 0x3c) >> 2);
char_array_3[2] = ((char_array_4[2] & 0x3) << 6) + char_array_4[3];
for (i = 0; (i < 3); i++)
ret += char_array_3[i];
i = 0;
}
}
if (i) {
for (j = i; j <4; j++)
char_array_4[j] = 0;
for (j = 0; j <4; j++)
char_array_4[j] = (unsigned char)base64_chars().find(char_array_4[j]);
char_array_3[0] = (char_array_4[0] << 2) + ((char_array_4[1] & 0x30) >> 4);
char_array_3[1] = ((char_array_4[1] & 0xf) << 4) + ((char_array_4[2] & 0x3c) >> 2);
char_array_3[2] = ((char_array_4[2] & 0x3) << 6) + char_array_4[3];
for (j = 0; (j < i - 1); j++) ret += char_array_3[j];
}
return ret;
}
//md5
#ifdef MD5_H
inline
std::string get_buf_as_hex_string(const void* pbuf, size_t len)
{
std::ostringstream result;
const unsigned char* p_buff = (const unsigned char*)pbuf;
for(unsigned int i=0;i<len;i++)
{ // convert md to hex-represented string (hex-letters in upper case!)
result << std::setw(2) << std::setfill('0')
<< std::setbase(16) << std::nouppercase
<< (int)*p_buff++;
}
return result.str();
}
inline
std::string get_md5_as_hexstring(const void* pbuff, size_t len)
{
unsigned char output[16] = {0};
md5::md5((unsigned char*)pbuff, static_cast<unsigned int>(len), output);
return get_buf_as_hex_string(output, sizeof(output));
}
inline
std::string get_md5_as_hexstring(const std::string& src)
{
return get_md5_as_hexstring(src.data(), src.size());
}
#endif
}
}
#endif //_STRING_CODING_H_
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