mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-09-20 00:30:49 +00:00
733 lines
18 KiB
C++
733 lines
18 KiB
C++
//
|
|
// String.h
|
|
//
|
|
// Library: Foundation
|
|
// Package: Core
|
|
// Module: String
|
|
//
|
|
// String utility functions.
|
|
//
|
|
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
|
|
// and Contributors.
|
|
//
|
|
// SPDX-License-Identifier: BSL-1.0
|
|
//
|
|
|
|
|
|
#ifndef Foundation_String_INCLUDED
|
|
#define Foundation_String_INCLUDED
|
|
|
|
|
|
#include <algorithm>
|
|
#include <cstring>
|
|
#include "Poco/Ascii.h"
|
|
#include "Poco/Foundation.h"
|
|
|
|
|
|
namespace Poco
|
|
{
|
|
|
|
|
|
template <class S>
|
|
S trimLeft(const S & str)
|
|
/// Returns a copy of str with all leading
|
|
/// whitespace removed.
|
|
{
|
|
typename S::const_iterator it = str.begin();
|
|
typename S::const_iterator end = str.end();
|
|
|
|
while (it != end && Ascii::isSpace(*it))
|
|
++it;
|
|
return S(it, end);
|
|
}
|
|
|
|
|
|
template <class S>
|
|
S & trimLeftInPlace(S & str)
|
|
/// Removes all leading whitespace in str.
|
|
{
|
|
typename S::iterator it = str.begin();
|
|
typename S::iterator end = str.end();
|
|
|
|
while (it != end && Ascii::isSpace(*it))
|
|
++it;
|
|
str.erase(str.begin(), it);
|
|
return str;
|
|
}
|
|
|
|
|
|
template <class S>
|
|
S trimRight(const S & str)
|
|
/// Returns a copy of str with all trailing
|
|
/// whitespace removed.
|
|
{
|
|
int pos = int(str.size()) - 1;
|
|
|
|
while (pos >= 0 && Ascii::isSpace(str[pos]))
|
|
--pos;
|
|
return S(str, 0, pos + 1);
|
|
}
|
|
|
|
|
|
template <class S>
|
|
S & trimRightInPlace(S & str)
|
|
/// Removes all trailing whitespace in str.
|
|
{
|
|
int pos = int(str.size()) - 1;
|
|
|
|
while (pos >= 0 && Ascii::isSpace(str[pos]))
|
|
--pos;
|
|
str.resize(pos + 1);
|
|
|
|
return str;
|
|
}
|
|
|
|
|
|
template <class S>
|
|
S trim(const S & str)
|
|
/// Returns a copy of str with all leading and
|
|
/// trailing whitespace removed.
|
|
{
|
|
int first = 0;
|
|
int last = int(str.size()) - 1;
|
|
|
|
while (first <= last && Ascii::isSpace(str[first]))
|
|
++first;
|
|
while (last >= first && Ascii::isSpace(str[last]))
|
|
--last;
|
|
|
|
return S(str, first, last - first + 1);
|
|
}
|
|
|
|
|
|
template <class S>
|
|
S & trimInPlace(S & str)
|
|
/// Removes all leading and trailing whitespace in str.
|
|
{
|
|
int first = 0;
|
|
int last = int(str.size()) - 1;
|
|
|
|
while (first <= last && Ascii::isSpace(str[first]))
|
|
++first;
|
|
while (last >= first && Ascii::isSpace(str[last]))
|
|
--last;
|
|
|
|
str.resize(last + 1);
|
|
str.erase(0, first);
|
|
|
|
return str;
|
|
}
|
|
|
|
|
|
template <class S>
|
|
S toUpper(const S & str)
|
|
/// Returns a copy of str containing all upper-case characters.
|
|
{
|
|
typename S::const_iterator it = str.begin();
|
|
typename S::const_iterator end = str.end();
|
|
|
|
S result;
|
|
result.reserve(str.size());
|
|
while (it != end)
|
|
result += static_cast<typename S::value_type>(Ascii::toUpper(*it++));
|
|
return result;
|
|
}
|
|
|
|
|
|
template <class S>
|
|
S & toUpperInPlace(S & str)
|
|
/// Replaces all characters in str with their upper-case counterparts.
|
|
{
|
|
typename S::iterator it = str.begin();
|
|
typename S::iterator end = str.end();
|
|
|
|
while (it != end)
|
|
{
|
|
*it = static_cast<typename S::value_type>(Ascii::toUpper(*it));
|
|
++it;
|
|
}
|
|
return str;
|
|
}
|
|
|
|
|
|
template <class S>
|
|
S toLower(const S & str)
|
|
/// Returns a copy of str containing all lower-case characters.
|
|
{
|
|
typename S::const_iterator it = str.begin();
|
|
typename S::const_iterator end = str.end();
|
|
|
|
S result;
|
|
result.reserve(str.size());
|
|
while (it != end)
|
|
result += static_cast<typename S::value_type>(Ascii::toLower(*it++));
|
|
return result;
|
|
}
|
|
|
|
|
|
template <class S>
|
|
S & toLowerInPlace(S & str)
|
|
/// Replaces all characters in str with their lower-case counterparts.
|
|
{
|
|
typename S::iterator it = str.begin();
|
|
typename S::iterator end = str.end();
|
|
|
|
while (it != end)
|
|
{
|
|
*it = static_cast<typename S::value_type>(Ascii::toLower(*it));
|
|
++it;
|
|
}
|
|
return str;
|
|
}
|
|
|
|
|
|
#if !defined(POCO_NO_TEMPLATE_ICOMPARE)
|
|
|
|
|
|
template <class S, class It>
|
|
int icompare(const S & str, typename S::size_type pos, typename S::size_type n, It it2, It end2)
|
|
/// Case-insensitive string comparison
|
|
{
|
|
typename S::size_type sz = str.size();
|
|
if (pos > sz)
|
|
pos = sz;
|
|
if (pos + n > sz)
|
|
n = sz - pos;
|
|
It it1 = str.begin() + pos;
|
|
It end1 = str.begin() + pos + n;
|
|
while (it1 != end1 && it2 != end2)
|
|
{
|
|
typename S::value_type c1(static_cast<typename S::value_type>(Ascii::toLower(*it1)));
|
|
typename S::value_type c2(static_cast<typename S::value_type>(Ascii::toLower(*it2)));
|
|
if (c1 < c2)
|
|
return -1;
|
|
else if (c1 > c2)
|
|
return 1;
|
|
++it1;
|
|
++it2;
|
|
}
|
|
|
|
if (it1 == end1)
|
|
return it2 == end2 ? 0 : -1;
|
|
else
|
|
return 1;
|
|
}
|
|
|
|
|
|
template <class S>
|
|
int icompare(const S & str1, const S & str2)
|
|
// A special optimization for an often used case.
|
|
{
|
|
typename S::const_iterator it1(str1.begin());
|
|
typename S::const_iterator end1(str1.end());
|
|
typename S::const_iterator it2(str2.begin());
|
|
typename S::const_iterator end2(str2.end());
|
|
while (it1 != end1 && it2 != end2)
|
|
{
|
|
typename S::value_type c1(static_cast<typename S::value_type>(Ascii::toLower(*it1)));
|
|
typename S::value_type c2(static_cast<typename S::value_type>(Ascii::toLower(*it2)));
|
|
if (c1 < c2)
|
|
return -1;
|
|
else if (c1 > c2)
|
|
return 1;
|
|
++it1;
|
|
++it2;
|
|
}
|
|
|
|
if (it1 == end1)
|
|
return it2 == end2 ? 0 : -1;
|
|
else
|
|
return 1;
|
|
}
|
|
|
|
|
|
template <class S>
|
|
int icompare(const S & str1, typename S::size_type n1, const S & str2, typename S::size_type n2)
|
|
{
|
|
if (n2 > str2.size())
|
|
n2 = str2.size();
|
|
return icompare(str1, 0, n1, str2.begin(), str2.begin() + n2);
|
|
}
|
|
|
|
|
|
template <class S>
|
|
int icompare(const S & str1, typename S::size_type n, const S & str2)
|
|
{
|
|
if (n > str2.size())
|
|
n = str2.size();
|
|
return icompare(str1, 0, n, str2.begin(), str2.begin() + n);
|
|
}
|
|
|
|
|
|
template <class S>
|
|
int icompare(const S & str1, typename S::size_type pos, typename S::size_type n, const S & str2)
|
|
{
|
|
return icompare(str1, pos, n, str2.begin(), str2.end());
|
|
}
|
|
|
|
|
|
template <class S>
|
|
int icompare(
|
|
const S & str1,
|
|
typename S::size_type pos1,
|
|
typename S::size_type n1,
|
|
const S & str2,
|
|
typename S::size_type pos2,
|
|
typename S::size_type n2)
|
|
{
|
|
typename S::size_type sz2 = str2.size();
|
|
if (pos2 > sz2)
|
|
pos2 = sz2;
|
|
if (pos2 + n2 > sz2)
|
|
n2 = sz2 - pos2;
|
|
return icompare(str1, pos1, n1, str2.begin() + pos2, str2.begin() + pos2 + n2);
|
|
}
|
|
|
|
|
|
template <class S>
|
|
int icompare(const S & str1, typename S::size_type pos1, typename S::size_type n, const S & str2, typename S::size_type pos2)
|
|
{
|
|
typename S::size_type sz2 = str2.size();
|
|
if (pos2 > sz2)
|
|
pos2 = sz2;
|
|
if (pos2 + n > sz2)
|
|
n = sz2 - pos2;
|
|
return icompare(str1, pos1, n, str2.begin() + pos2, str2.begin() + pos2 + n);
|
|
}
|
|
|
|
|
|
template <class S>
|
|
int icompare(const S & str, typename S::size_type pos, typename S::size_type n, const typename S::value_type * ptr)
|
|
{
|
|
poco_check_ptr(ptr);
|
|
typename S::size_type sz = str.size();
|
|
if (pos > sz)
|
|
pos = sz;
|
|
if (pos + n > sz)
|
|
n = sz - pos;
|
|
typename S::const_iterator it = str.begin() + pos;
|
|
typename S::const_iterator end = str.begin() + pos + n;
|
|
while (it != end && *ptr)
|
|
{
|
|
typename S::value_type c1(static_cast<typename S::value_type>(Ascii::toLower(*it)));
|
|
typename S::value_type c2(static_cast<typename S::value_type>(Ascii::toLower(*ptr)));
|
|
if (c1 < c2)
|
|
return -1;
|
|
else if (c1 > c2)
|
|
return 1;
|
|
++it;
|
|
++ptr;
|
|
}
|
|
|
|
if (it == end)
|
|
return *ptr == 0 ? 0 : -1;
|
|
else
|
|
return 1;
|
|
}
|
|
|
|
|
|
template <class S>
|
|
int icompare(const S & str, typename S::size_type pos, const typename S::value_type * ptr)
|
|
{
|
|
return icompare(str, pos, str.size() - pos, ptr);
|
|
}
|
|
|
|
|
|
template <class S>
|
|
int icompare(const S & str, const typename S::value_type * ptr)
|
|
{
|
|
return icompare(str, 0, str.size(), ptr);
|
|
}
|
|
|
|
|
|
#else
|
|
|
|
|
|
int Foundation_API icompare(
|
|
const std::string & str,
|
|
std::string::size_type pos,
|
|
std::string::size_type n,
|
|
std::string::const_iterator it2,
|
|
std::string::const_iterator end2);
|
|
int Foundation_API icompare(const std::string & str1, const std::string & str2);
|
|
int Foundation_API icompare(const std::string & str1, std::string::size_type n1, const std::string & str2, std::string::size_type n2);
|
|
int Foundation_API icompare(const std::string & str1, std::string::size_type n, const std::string & str2);
|
|
int Foundation_API icompare(const std::string & str1, std::string::size_type pos, std::string::size_type n, const std::string & str2);
|
|
int Foundation_API icompare(
|
|
const std::string & str1,
|
|
std::string::size_type pos1,
|
|
std::string::size_type n1,
|
|
const std::string & str2,
|
|
std::string::size_type pos2,
|
|
std::string::size_type n2);
|
|
int Foundation_API icompare(
|
|
const std::string & str1, std::string::size_type pos1, std::string::size_type n, const std::string & str2, std::string::size_type pos2);
|
|
int Foundation_API
|
|
icompare(const std::string & str, std::string::size_type pos, std::string::size_type n, const std::string::value_type * ptr);
|
|
int Foundation_API icompare(const std::string & str, std::string::size_type pos, const std::string::value_type * ptr);
|
|
int Foundation_API icompare(const std::string & str, const std::string::value_type * ptr);
|
|
|
|
|
|
#endif
|
|
|
|
|
|
template <class S>
|
|
S translate(const S & str, const S & from, const S & to)
|
|
/// Returns a copy of str with all characters in
|
|
/// from replaced by the corresponding (by position)
|
|
/// characters in to. If there is no corresponding
|
|
/// character in to, the character is removed from
|
|
/// the copy.
|
|
{
|
|
S result;
|
|
result.reserve(str.size());
|
|
typename S::const_iterator it = str.begin();
|
|
typename S::const_iterator end = str.end();
|
|
typename S::size_type toSize = to.size();
|
|
while (it != end)
|
|
{
|
|
typename S::size_type pos = from.find(*it);
|
|
if (pos == S::npos)
|
|
{
|
|
result += *it;
|
|
}
|
|
else
|
|
{
|
|
if (pos < toSize)
|
|
result += to[pos];
|
|
}
|
|
++it;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
|
|
template <class S>
|
|
S translate(const S & str, const typename S::value_type * from, const typename S::value_type * to)
|
|
{
|
|
poco_check_ptr(from);
|
|
poco_check_ptr(to);
|
|
return translate(str, S(from), S(to));
|
|
}
|
|
|
|
|
|
template <class S>
|
|
S & translateInPlace(S & str, const S & from, const S & to)
|
|
/// Replaces in str all occurrences of characters in from
|
|
/// with the corresponding (by position) characters in to.
|
|
/// If there is no corresponding character, the character
|
|
/// is removed.
|
|
{
|
|
str = translate(str, from, to);
|
|
return str;
|
|
}
|
|
|
|
|
|
template <class S>
|
|
S translateInPlace(S & str, const typename S::value_type * from, const typename S::value_type * to)
|
|
{
|
|
poco_check_ptr(from);
|
|
poco_check_ptr(to);
|
|
str = translate(str, S(from), S(to));
|
|
return str;
|
|
}
|
|
|
|
|
|
#if !defined(POCO_NO_TEMPLATE_ICOMPARE)
|
|
|
|
|
|
template <class S>
|
|
S & replaceInPlace(S & str, const S & from, const S & to, typename S::size_type start = 0)
|
|
{
|
|
poco_assert(from.size() > 0);
|
|
|
|
S result;
|
|
typename S::size_type pos = 0;
|
|
result.append(str, 0, start);
|
|
do
|
|
{
|
|
pos = str.find(from, start);
|
|
if (pos != S::npos)
|
|
{
|
|
result.append(str, start, pos - start);
|
|
result.append(to);
|
|
start = pos + from.length();
|
|
}
|
|
else
|
|
result.append(str, start, str.size() - start);
|
|
} while (pos != S::npos);
|
|
str.swap(result);
|
|
return str;
|
|
}
|
|
|
|
|
|
template <class S>
|
|
S & replaceInPlace(S & str, const typename S::value_type * from, const typename S::value_type * to, typename S::size_type start = 0)
|
|
{
|
|
poco_assert(*from);
|
|
|
|
S result;
|
|
typename S::size_type pos = 0;
|
|
typename S::size_type fromLen = std::strlen(from);
|
|
result.append(str, 0, start);
|
|
do
|
|
{
|
|
pos = str.find(from, start);
|
|
if (pos != S::npos)
|
|
{
|
|
result.append(str, start, pos - start);
|
|
result.append(to);
|
|
start = pos + fromLen;
|
|
}
|
|
else
|
|
result.append(str, start, str.size() - start);
|
|
} while (pos != S::npos);
|
|
str.swap(result);
|
|
return str;
|
|
}
|
|
|
|
|
|
template <class S>
|
|
S & replaceInPlace(S & str, const typename S::value_type from, const typename S::value_type to = 0, typename S::size_type start = 0)
|
|
{
|
|
if (from == to)
|
|
return str;
|
|
|
|
typename S::size_type pos = 0;
|
|
do
|
|
{
|
|
pos = str.find(from, start);
|
|
if (pos != S::npos)
|
|
{
|
|
if (to)
|
|
str[pos] = to;
|
|
else
|
|
str.erase(pos, 1);
|
|
}
|
|
} while (pos != S::npos);
|
|
|
|
return str;
|
|
}
|
|
|
|
|
|
template <class S>
|
|
S & removeInPlace(S & str, const typename S::value_type ch, typename S::size_type start = 0)
|
|
{
|
|
return replaceInPlace(str, ch, 0, start);
|
|
}
|
|
|
|
|
|
template <class S>
|
|
S replace(const S & str, const S & from, const S & to, typename S::size_type start = 0)
|
|
/// Replace all occurrences of from (which must not be the empty string)
|
|
/// in str with to, starting at position start.
|
|
{
|
|
S result(str);
|
|
replaceInPlace(result, from, to, start);
|
|
return result;
|
|
}
|
|
|
|
|
|
template <class S>
|
|
S replace(const S & str, const typename S::value_type * from, const typename S::value_type * to, typename S::size_type start = 0)
|
|
{
|
|
S result(str);
|
|
replaceInPlace(result, from, to, start);
|
|
return result;
|
|
}
|
|
|
|
|
|
template <class S>
|
|
S replace(const S & str, const typename S::value_type from, const typename S::value_type to = 0, typename S::size_type start = 0)
|
|
{
|
|
S result(str);
|
|
replaceInPlace(result, from, to, start);
|
|
return result;
|
|
}
|
|
|
|
|
|
template <class S>
|
|
S remove(const S & str, const typename S::value_type ch, typename S::size_type start = 0)
|
|
{
|
|
S result(str);
|
|
replaceInPlace(result, ch, 0, start);
|
|
return result;
|
|
}
|
|
|
|
|
|
#else
|
|
|
|
|
|
Foundation_API std::string
|
|
replace(const std::string & str, const std::string & from, const std::string & to, std::string::size_type start = 0);
|
|
Foundation_API std::string replace(
|
|
const std::string & str, const std::string::value_type * from, const std::string::value_type * to, std::string::size_type start = 0);
|
|
Foundation_API std::string replace(
|
|
const std::string & str, const std::string::value_type from, const std::string::value_type to = 0, std::string::size_type start = 0);
|
|
Foundation_API std::string remove(const std::string & str, const std::string::value_type ch, std::string::size_type start = 0);
|
|
Foundation_API std::string &
|
|
replaceInPlace(std::string & str, const std::string & from, const std::string & to, std::string::size_type start = 0);
|
|
Foundation_API std::string & replaceInPlace(
|
|
std::string & str, const std::string::value_type * from, const std::string::value_type * to, std::string::size_type start = 0);
|
|
Foundation_API std::string & replaceInPlace(
|
|
std::string & str, const std::string::value_type from, const std::string::value_type to = 0, std::string::size_type start = 0);
|
|
Foundation_API std::string & removeInPlace(std::string & str, const std::string::value_type ch, std::string::size_type start = 0);
|
|
|
|
|
|
#endif
|
|
|
|
|
|
template <class S>
|
|
S cat(const S & s1, const S & s2)
|
|
/// Concatenates two strings.
|
|
{
|
|
S result = s1;
|
|
result.reserve(s1.size() + s2.size());
|
|
result.append(s2);
|
|
return result;
|
|
}
|
|
|
|
|
|
template <class S>
|
|
S cat(const S & s1, const S & s2, const S & s3)
|
|
/// Concatenates three strings.
|
|
{
|
|
S result = s1;
|
|
result.reserve(s1.size() + s2.size() + s3.size());
|
|
result.append(s2);
|
|
result.append(s3);
|
|
return result;
|
|
}
|
|
|
|
|
|
template <class S>
|
|
S cat(const S & s1, const S & s2, const S & s3, const S & s4)
|
|
/// Concatenates four strings.
|
|
{
|
|
S result = s1;
|
|
result.reserve(s1.size() + s2.size() + s3.size() + s4.size());
|
|
result.append(s2);
|
|
result.append(s3);
|
|
result.append(s4);
|
|
return result;
|
|
}
|
|
|
|
|
|
template <class S>
|
|
S cat(const S & s1, const S & s2, const S & s3, const S & s4, const S & s5)
|
|
/// Concatenates five strings.
|
|
{
|
|
S result = s1;
|
|
result.reserve(s1.size() + s2.size() + s3.size() + s4.size() + s5.size());
|
|
result.append(s2);
|
|
result.append(s3);
|
|
result.append(s4);
|
|
result.append(s5);
|
|
return result;
|
|
}
|
|
|
|
|
|
template <class S>
|
|
S cat(const S & s1, const S & s2, const S & s3, const S & s4, const S & s5, const S & s6)
|
|
/// Concatenates six strings.
|
|
{
|
|
S result = s1;
|
|
result.reserve(s1.size() + s2.size() + s3.size() + s4.size() + s5.size() + s6.size());
|
|
result.append(s2);
|
|
result.append(s3);
|
|
result.append(s4);
|
|
result.append(s5);
|
|
result.append(s6);
|
|
return result;
|
|
}
|
|
|
|
|
|
template <class S, class It>
|
|
S cat(const S & delim, const It & begin, const It & end)
|
|
/// Concatenates a sequence of strings, delimited
|
|
/// by the string given in delim.
|
|
{
|
|
S result;
|
|
for (It it = begin; it != end; ++it)
|
|
{
|
|
if (!result.empty())
|
|
result.append(delim);
|
|
result += *it;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
|
|
//
|
|
// case-insensitive string equality
|
|
//
|
|
|
|
|
|
template <typename charT>
|
|
struct i_char_traits : public std::char_traits<charT>
|
|
{
|
|
inline static bool eq(charT c1, charT c2) { return Ascii::toLower(c1) == Ascii::toLower(c2); }
|
|
|
|
inline static bool ne(charT c1, charT c2) { return !eq(c1, c2); }
|
|
|
|
inline static bool lt(charT c1, charT c2) { return Ascii::toLower(c1) < Ascii::toLower(c2); }
|
|
|
|
static int compare(const charT * s1, const charT * s2, std::size_t n)
|
|
{
|
|
for (int i = 0; i < n && s1 && s2; ++i, ++s1, ++s2)
|
|
{
|
|
if (Ascii::toLower(*s1) == Ascii::toLower(*s2))
|
|
continue;
|
|
else if (Ascii::toLower(*s1) < Ascii::toLower(*s2))
|
|
return -1;
|
|
else
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const charT * find(const charT * s, int n, charT a)
|
|
{
|
|
while (n-- > 0 && Ascii::toLower(*s) != Ascii::toLower(a))
|
|
{
|
|
++s;
|
|
}
|
|
return s;
|
|
}
|
|
};
|
|
|
|
|
|
typedef std::basic_string<char, i_char_traits<char>> istring;
|
|
/// Case-insensitive std::string counterpart.
|
|
|
|
|
|
template <typename T>
|
|
std::size_t isubstr(const T & str, const T & sought)
|
|
/// Case-insensitive substring; searches for a substring
|
|
/// without regards to case.
|
|
{
|
|
typename T::const_iterator it
|
|
= std::search(str.begin(), str.end(), sought.begin(), sought.end(), i_char_traits<typename T::value_type>::eq);
|
|
|
|
if (it != str.end())
|
|
return it - str.begin();
|
|
else
|
|
return static_cast<std::size_t>(T::npos);
|
|
}
|
|
|
|
|
|
struct CILess
|
|
/// Case-insensitive less-than functor; useful for standard maps
|
|
/// and sets with std::strings keys and case-insensitive ordering
|
|
/// requirement.
|
|
{
|
|
inline bool operator()(const std::string & s1, const std::string & s2) const { return icompare(s1, s2) < 0; }
|
|
};
|
|
|
|
|
|
} // namespace Poco
|
|
|
|
|
|
#endif // Foundation_String_INCLUDED
|