euarel
/
src
/
euarel.cc
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96#include "euarel.hh"
#include <cstdio>
#include <cctype>
#include <cstddef>
#include <string>
namespace OB::Euarel
{
std::string hex_encode(char const c);
char hex_decode(std::string const& s);
std::string hex_encode(char const c)
{
char s[3];
if (c & 0x80)
{
std::snprintf(&s[0], 3, "%02X",
static_cast<unsigned int>(c & 0xff)
);
}
else
{
std::snprintf(&s[0], 3, "%02X",
static_cast<unsigned int>(c)
);
}
return std::string(s);
}
char hex_decode(std::string const& s)
{
unsigned int n;
std::sscanf(s.data(), "%x", &n);
return static_cast<char>(n);
}
std::string url_encode(std::string const& str, bool form)
{
std::string res;
res.reserve(str.size());
for (auto const& e : str)
{
if (e == ' ' && form)
{
res += "+";
}
else if (std::isalnum(static_cast<unsigned char>(e)) ||
e == '-' || e == '_' || e == '.' || e == '~')
{
res += e;
}
else
{
res += "%" + hex_encode(e);
}
}
return res;
}
std::string url_decode(std::string const& str, bool form)
{
std::string res;
res.reserve(str.size());
for (std::size_t i = 0; i < str.size(); ++i)
{
if (str[i] == '+' && form)
{
res += " ";
}
else if (str[i] == '%' && i + 2 < str.size() &&
std::isxdigit(static_cast<unsigned char>(str[i + 1])) &&
std::isxdigit(static_cast<unsigned char>(str[i + 2])))
{
res += hex_decode(str.substr(i + 1, 2));
i += 2;
}
else
{
res += str[i];
}
}
return res;
}
} // namespace OB::Euarel