ClickHouse/dbms/include/DB/Common/escapeForFileName.h

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#pragma once
#include <string>
#include <DB/IO/ReadHelpers.h>
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namespace DB
{
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inline std::string escapeForFileName(const std::string & s)
{
std::string res;
const char * pos = s.data();
const char * end = pos + s.size();
static const char * hex = "0123456789ABCDEF";
while (pos != end)
{
char c = *pos;
if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9') || (c == '_'))
res += c;
else
{
res += '%';
res += hex[c / 16];
res += hex[c % 16];
}
++pos;
}
return res;
}
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inline 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 != '%')
res += *pos;
else
{
/// пропустим '%'
if (++pos == end) break;
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char val = unhex(*pos) * 16;
if (++pos == end) break;
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val += unhex(*pos);
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res += val;
}
++pos;
}
return res;
}
}