mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-09-30 05:30:51 +00:00
71 lines
1.5 KiB
C++
71 lines
1.5 KiB
C++
#pragma once
|
|
|
|
#include <DB/Common/Exception.h>
|
|
#include <string>
|
|
#include <cstring>
|
|
|
|
namespace DB { namespace ErrorCodes {
|
|
|
|
extern const int LOGICAL_ERROR;
|
|
|
|
}}
|
|
|
|
namespace detail
|
|
{
|
|
bool startsWith(const std::string & s, const char * prefix, size_t prefix_size);
|
|
bool endsWith(const std::string & s, const char * suffix, size_t suffix_size);
|
|
}
|
|
|
|
|
|
inline bool startsWith(const std::string & s, const std::string & prefix)
|
|
{
|
|
return detail::startsWith(s, prefix.data(), prefix.size());
|
|
}
|
|
|
|
inline bool endsWith(const std::string & s, const std::string & suffix)
|
|
{
|
|
return detail::endsWith(s, suffix.data(), suffix.size());
|
|
}
|
|
|
|
|
|
/// With GCC, strlen is evaluated compile time if we pass it a constant
|
|
/// string that is known at compile time.
|
|
inline bool startsWith(const std::string & s, const char * prefix)
|
|
{
|
|
return detail::startsWith(s, prefix, strlen(prefix));
|
|
}
|
|
|
|
inline bool endsWith(const std::string & s, const char * suffix)
|
|
{
|
|
return detail::endsWith(s, suffix, strlen(suffix));
|
|
}
|
|
|
|
/// Given an integer, return the adequate suffix for
|
|
/// printing an ordinal number.
|
|
template <typename T>
|
|
std::string getOrdinalSuffix(T n)
|
|
{
|
|
static_assert(std::is_integral<T>::value, "Integer value required");
|
|
|
|
auto val = n % 10;
|
|
|
|
bool is_th;
|
|
if ((val >= 1) && (val <= 3))
|
|
is_th = (n > 10) && (((n / 10) % 10) == 1);
|
|
else
|
|
is_th = true;
|
|
|
|
if (is_th)
|
|
return "th";
|
|
else
|
|
{
|
|
switch (val)
|
|
{
|
|
case 1: return "st";
|
|
case 2: return "nd";
|
|
case 3: return "rd";
|
|
default: throw DB::Exception{"Internal error", DB::ErrorCodes::LOGICAL_ERROR};
|
|
};
|
|
}
|
|
}
|