ClickHouse/dbms/src/Common/escapeForFileName.cpp

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#include <Common/hex.h>
#include <Common/StringUtils/StringUtils.h>
#include <Common/escapeForFileName.h>
namespace DB
{
std::string escapeForFileName(const std::string & s)
{
std::string res;
const char * pos = s.data();
const char * end = pos + s.size();
while (pos != end)
{
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unsigned char c = *pos;
if (isWordCharASCII(c))
res += c;
else
{
res += '%';
res += hexDigitUppercase(c / 16);
res += hexDigitUppercase(c % 16);
}
++pos;
}
return res;
}
std::string unescapeForFileName(const std::string & s)
{
std::string res;
const char * pos = s.data();
const char * end = pos + s.size();
while (pos != end)
{
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if (!(*pos == '%' && pos + 2 < end))
{
res += *pos;
++pos;
}
else
{
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++pos;
res += unhex2(pos);
pos += 2;
}
}
return res;
}
}