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author | Martin Zumsande <mzumsande@gmail.com> | 2019-11-25 01:33:17 +0100 |
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committer | Martin Zumsande <mzumsande@gmail.com> | 2019-11-25 01:33:17 +0100 |
commit | 2cb4e8bdc7ef75ae8d95c246af1e8e1f9c7045bd (patch) | |
tree | 478c4b892e09f4103061f42052460c50e22ca9b3 /src/test/util/str.h | |
parent | 239d199667888e5d60309f15a38eed4d3afe56c4 (diff) | |
download | bitcoin-2cb4e8bdc7ef75ae8d95c246af1e8e1f9c7045bd.tar.xz |
[test] move string helper functions into test library
Diffstat (limited to 'src/test/util/str.h')
-rw-r--r-- | src/test/util/str.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/src/test/util/str.h b/src/test/util/str.h index 63629501e8..ef94692df0 100644 --- a/src/test/util/str.h +++ b/src/test/util/str.h @@ -9,4 +9,37 @@ 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 |