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// Copyright (c) 2019 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#ifndef BITCOIN_TEST_UTIL_STR_H
#define BITCOIN_TEST_UTIL_STR_H
#include <string>
bool CaseInsensitiveEqual(const std::string& s1, const std::string& s2);
/**
* Increment a string. Useful to enumerate all fixed length strings with
* characters in [min_char, max_char].
*/
template <typename CharType, size_t StringLength>
bool NextString(CharType (&string)[StringLength], CharType min_char, CharType max_char)
{
for (CharType& elem : string) {
bool has_next = elem != max_char;
elem = elem < min_char || elem >= max_char ? min_char : CharType(elem + 1);
if (has_next) return true;
}
return false;
}
/**
* Iterate over string values and call function for each string without
* successive duplicate characters.
*/
template <typename CharType, size_t StringLength, typename Fn>
void ForEachNoDup(CharType (&string)[StringLength], CharType min_char, CharType max_char, Fn&& fn) {
for (bool has_next = true; has_next; has_next = NextString(string, min_char, max_char)) {
int prev = -1;
bool skip_string = false;
for (CharType c : string) {
if (c == prev) skip_string = true;
if (skip_string || c < min_char || c > max_char) break;
prev = c;
}
if (!skip_string) fn();
}
}
#endif // BITCOIN_TEST_UTIL_STR_H
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