Line data    Source code

       1             : // Copyright (c) 2019 The Bitcoin Core developers
       2             : // Distributed under the MIT software license, see the accompanying
       3             : // file COPYING or http://www.opensource.org/licenses/mit-license.php.
       4             : 
       5             : #ifndef BITCOIN_TEST_UTIL_STR_H
       6             : #define BITCOIN_TEST_UTIL_STR_H
       7             : 
       8             : #include <string>
       9             : 
      10             : bool CaseInsensitiveEqual(const std::string& s1, const std::string& s2);
      11             : 
      12             : /**
      13             :  * Increment a string. Useful to enumerate all fixed length strings with
      14             :  * characters in [min_char, max_char].
      15             :  */
      16             : template <typename CharType, size_t StringLength>
      17        2854 : bool NextString(CharType (&string)[StringLength], CharType min_char, CharType max_char)
      18             : {
      19        3558 :     for (CharType& elem : string) {
      20        3504 :         bool has_next = elem != max_char;
      21        3504 :         elem = elem < min_char || elem >= max_char ? min_char : CharType(elem + 1);
      22        3504 :         if (has_next) return true;
      23             :     }
      24          54 :     return false;
      25        2854 : }
      26             : 
      27             : /**
      28             :  * Iterate over string values and call function for each string without
      29             :  * successive duplicate characters.
      30             :  */
      31             : template <typename CharType, size_t StringLength, typename Fn>
      32          54 : void ForEachNoDup(CharType (&string)[StringLength], CharType min_char, CharType max_char, Fn&& fn) {
      33        2908 :     for (bool has_next = true; has_next; has_next = NextString(string, min_char, max_char)) {
      34        2854 :         int prev = -1;
      35        2854 :         bool skip_string = false;
      36        8154 :         for (CharType c : string) {
      37        6506 :             if (c == prev) skip_string = true;
      38        6506 :             if (skip_string || c < min_char || c > max_char) break;
      39        5300 :             prev = c;
      40             :         }
      41        2854 :         if (!skip_string) fn();
      42        2854 :     }
      43          54 : }
      44             : 
      45             : #endif // BITCOIN_TEST_UTIL_STR_H