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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#pragma once
#include <string>
template<typename S>
static std::string pretty_binary_string(const S& bin)
{
std::string pretty;
if (bin.empty())
return pretty;
pretty.reserve(bin.length() * 3);
auto printable = [](unsigned char c) -> bool {
return (c >= 32) && (c <= 126);
};
auto append_hex = [&](unsigned char c) {
static const char hex[16] = {'0', '1', '2', '3',
'4', '5', '6', '7',
'8', '9', 'A', 'B',
'C', 'D', 'E', 'F'};
pretty.push_back(hex[c / 16]);
pretty.push_back(hex[c % 16]);
};
// prologue
bool strmode = printable(bin[0]);
if (strmode) {
pretty.push_back('\'');
} else {
pretty.push_back('0');
pretty.push_back('x');
}
for (size_t i = 0; i < bin.length(); ++i) {
// change mode from hex to str if following 3 characters are printable
if (strmode) {
if (!printable(bin[i])) {
pretty.push_back('\'');
pretty.push_back('0');
pretty.push_back('x');
strmode = false;
}
} else {
if (i + 2 < bin.length() &&
printable(bin[i]) &&
printable(bin[i + 1]) &&
printable(bin[i + 2])) {
pretty.push_back('\'');
strmode = true;
}
}
if (strmode) {
if (bin[i] == '\'')
pretty.push_back('\'');
pretty.push_back(bin[i]);
} else {
append_hex(bin[i]);
}
}
// epilog
if (strmode) {
pretty.push_back('\'');
}
return pretty;
}
std::string pretty_binary_string_reverse(const std::string& pretty);
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