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// stringutils.h
/* Copyright 2010 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects
* for all of the code used other than as permitted herein. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you do not
* wish to do so, delete this exception statement from your version. If you
* delete this exception statement from all source files in the program,
* then also delete it in the license file.
*/
#pragma once
#include <ctype.h>
#include <boost/optional.hpp>
#include <memory>
#include <string>
#include <vector>
#include "mongo/base/string_data.h"
namespace mongo {
// see also mongoutils/str.h - perhaps move these there?
// see also text.h
void splitStringDelim(const std::string& str, std::vector<std::string>* res, char delim);
void joinStringDelim(const std::vector<std::string>& strs, std::string* res, char delim);
inline std::string tolowerString(StringData input) {
std::string::size_type sz = input.size();
std::unique_ptr<char[]> line(new char[sz + 1]);
char* copy = line.get();
for (std::string::size_type i = 0; i < sz; i++) {
char c = input[i];
copy[i] = (char)tolower((int)c);
}
copy[sz] = 0;
return copy;
}
inline std::string toAsciiLowerCase(StringData input) {
size_t sz = input.size();
std::unique_ptr<char[]> line(new char[sz + 1]);
char* res = line.get();
for (size_t i = 0; i < sz; i++) {
char c = input[i];
if (c >= 'A' && c <= 'Z') {
res[i] = c + 32;
} else {
res[i] = c;
}
}
res[sz] = 0;
return res;
}
/** Functor for combining lexical and numeric comparisons. */
class LexNumCmp {
public:
/** @param lexOnly - compare all characters lexically, including digits. */
LexNumCmp(bool lexOnly);
/**
* Non numeric characters are compared lexicographically; numeric substrings
* are compared numerically; dots separate ordered comparable subunits.
* For convenience, character 255 is greater than anything else.
* @param lexOnly - compare all characters lexically, including digits.
*/
static int cmp(StringData s1, StringData s2, bool lexOnly);
int cmp(StringData s1, StringData s2) const;
bool operator()(StringData s1, StringData s2) const;
private:
bool _lexOnly;
};
// TODO: Sane-ify core std::string functionality
// For now, this needs to be near the LexNumCmp or else
int versionCmp(const StringData rhs, const StringData lhs);
/**
* A method to escape whitespace and control characters in strings. For example, the string "\t"
* goes to "\\t". If `escape_slash` is true, then "/" goes to "\\/".
*/
std::string escape(StringData s, bool escape_slash = false);
/**
* Converts 'integer' from a base-10 string to a size_t value or returns boost::none if 'integer'
* is not a valid base-10 string. A valid string is not allowed to have anything but decimal
* numerals, not even a +/- prefix or leading/trailing whitespace.
*/
boost::optional<size_t> parseUnsignedBase10Integer(StringData integer);
} // namespace mongo
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