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Improvements for epee binary to hex functions:

Browse source 
- Performance improvements
  - Added `span` for zero-copy pointer+length arguments
  - Added `std::ostream` overload for direct writing to output buffers
  - Removal of unused `string_tools::buff_to_hex`
This commit is contained in:
Lee Clagett 2017-02-27 13:33:16 -05:00
parent 9ed496bbc5
commit 4a8f96f95d
14 changed files with 767 additions and 76 deletions
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33
contrib/epee/include/string_tools.h
View file

@ -45,6 +45,8 @@
#include <boost/uuid/uuid_io.hpp>
#include <boost/lexical_cast.hpp>
#include <boost/algorithm/string.hpp>
#include "hex.h"
#include "span.h"
#include "warnings.h"
@ -114,33 +116,10 @@ namespace string_tools
return false;
}
}
//----------------------------------------------------------------------------
template<class CharT>
std::basic_string<CharT> buff_to_hex(const std::basic_string<CharT>& s)
{
using namespace std;
basic_stringstream<CharT> hexStream;
hexStream << hex << noshowbase << setw(2);
for(typename std::basic_string<CharT>::const_iterator it = s.begin(); it != s.end(); it++)
{
hexStream << "0x"<< static_cast<unsigned int>(static_cast<unsigned char>(*it)) << " ";
}
return hexStream.str();
}
//----------------------------------------------------------------------------
template<class CharT>
std::basic_string<CharT> buff_to_hex_nodelimer(const std::basic_string<CharT>& s)
inline std::string buff_to_hex_nodelimer(const std::string& src)
{
using namespace std;
basic_stringstream<CharT> hexStream;
hexStream << hex << noshowbase;
for(typename std::basic_string<CharT>::const_iterator it = s.begin(); it != s.end(); it++)
{
hexStream << setw(2) << setfill('0') << static_cast<unsigned int>(static_cast<unsigned char>(*it));
}
return hexStream.str();
return to_hex::string(to_byte_span(to_span(src)));
}
//----------------------------------------------------------------------------
template<class CharT>
@ -559,9 +538,7 @@ POP_WARNINGS
std::string pod_to_hex(const t_pod_type& s)
{
static_assert(std::is_pod<t_pod_type>::value, "expected pod type");
std::string buff;
buff.assign(reinterpret_cast<const char*>(&s), sizeof(s));
return buff_to_hex_nodelimer(buff);
return to_hex::string(as_byte_span(s));
}
//----------------------------------------------------------------------------
template<class t_pod_type>