catch2/include/internal/catch_tostring.cpp

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/*
* Created by Phil on 23/4/2014.
* Copyright 2014 Two Blue Cubes Ltd. All rights reserved.
*
* Distributed under the Boost Software License, Version 1.0. (See accompanying
* file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
*/
#include "catch_tostring.h"
#include "catch_interfaces_config.h"
#include "catch_context.h"
#include <iomanip>
namespace Catch {
namespace Detail {
const std::string unprintableString = "{?}";
namespace {
const int hexThreshold = 255;
struct Endianness {
enum Arch { Big, Little };
static Arch which() {
union _{
int asInt;
char asChar[sizeof (int)];
} u;
u.asInt = 1;
return ( u.asChar[sizeof(int)-1] == 1 ) ? Big : Little;
}
};
}
std::string rawMemoryToString( const void *object, std::size_t size ) {
// Reverse order for little endian architectures
int i = 0, end = static_cast<int>( size ), inc = 1;
if( Endianness::which() == Endianness::Little ) {
i = end-1;
end = inc = -1;
}
unsigned char const *bytes = static_cast<unsigned char const *>(object);
std::ostringstream os;
os << "0x" << std::setfill('0') << std::hex;
for( ; i != end; i += inc )
os << std::setw(2) << static_cast<unsigned>(bytes[i]);
return os.str();
}
}
template<typename T>
std::string fpToString( T value, int precision ) {
std::ostringstream oss;
oss << std::setprecision( precision )
<< std::fixed
<< value;
std::string d = oss.str();
std::size_t i = d.find_last_not_of( '0' );
if( i != std::string::npos && i != d.size()-1 ) {
if( d[i] == '.' )
i++;
d = d.substr( 0, i+1 );
}
return d;
}
//// ======================================================= ////
//
// Out-of-line defs for full specialization of StringMaker
//
//// ======================================================= ////
std::string StringMaker<std::string>::convert(const std::string& str) {
if (!getCurrentContext().getConfig()->showInvisibles()) {
return '"' + str + '"';
}
std::string s("\"");
for (char c : str) {
switch (c) {
case '\n':
s.append("\\n");
break;
case '\t':
s.append("\\t");
break;
default:
s.push_back(c);
break;
}
}
s.append("\"");
return s;
}
std::string StringMaker<std::wstring>::convert(const std::wstring& wstr) {
std::string s;
s.reserve(wstr.size());
for (auto c : wstr) {
s += (c <= 0xff) ? static_cast<char>(c) : '?';
}
return ::Catch::Detail::stringify(s);
}
std::string StringMaker<char const*>::convert(char const* str) {
if (str) {
return ::Catch::Detail::stringify(std::string{ str });
} else {
return{ "{null string}" };
}
}
std::string StringMaker<char*>::convert(char* str) {
if (str) {
return ::Catch::Detail::stringify(std::string{ str });
} else {
return{ "{null string}" };
}
}
std::string StringMaker<wchar_t const*>::convert(wchar_t const * str) {
if (str) {
return ::Catch::Detail::stringify(std::wstring{ str });
} else {
return{ "{null string}" };
}
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}
std::string StringMaker<wchar_t *>::convert(wchar_t * str) {
if (str) {
return ::Catch::Detail::stringify(std::wstring{ str });
} else {
return{ "{null string}" };
}
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}
std::string StringMaker<int>::convert(int value) {
return ::Catch::Detail::stringify(static_cast<long long>(value));
}
std::string StringMaker<long>::convert(long value) {
return ::Catch::Detail::stringify(static_cast<long long>(value));
}
std::string StringMaker<long long>::convert(long long value) {
std::ostringstream oss;
oss << value;
if (value > Detail::hexThreshold) {
oss << " (0x" << std::hex << value << ')';
}
return oss.str();
}
std::string StringMaker<unsigned int>::convert(unsigned int value) {
return ::Catch::Detail::stringify(static_cast<unsigned long long>(value));
}
std::string StringMaker<unsigned long>::convert(unsigned long value) {
return ::Catch::Detail::stringify(static_cast<unsigned long long>(value));
}
std::string StringMaker<unsigned long long>::convert(unsigned long long value) {
std::ostringstream oss;
oss << value;
if (value > Detail::hexThreshold) {
oss << " (0x" << std::hex << value << ')';
}
return oss.str();
}
std::string StringMaker<bool>::convert(bool b) {
return b ? "true" : "false";
}
std::string StringMaker<char>::convert(char value) {
if (value == '\r') {
return "'\\r'";
} else if (value == '\f') {
return "'\\f'";
} else if (value == '\n') {
return "'\\n'";
} else if (value == '\t') {
return "'\\t'";
} else if ('\0' <= value && value < ' ') {
return ::Catch::Detail::stringify(static_cast<unsigned int>(value));
} else {
char chstr[] = "' '";
chstr[1] = value;
return chstr;
}
}
std::string StringMaker<signed char>::convert(signed char c) {
return ::Catch::Detail::stringify(static_cast<char>(c));
}
std::string StringMaker<unsigned char>::convert(unsigned char c) {
return ::Catch::Detail::stringify(static_cast<char>(c));
}
std::string StringMaker<std::nullptr_t>::convert(std::nullptr_t) {
return "nullptr";
}
std::string StringMaker<float>::convert(float value) {
return fpToString(value, 5) + 'f';
}
std::string StringMaker<double>::convert(double value) {
return fpToString(value, 10);
}
} // end namespace Catch