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authorMartin Zumsande <mzumsande@gmail.com>2019-11-25 01:33:17 +0100
committerMartin Zumsande <mzumsande@gmail.com>2019-11-25 01:33:17 +0100
commit2cb4e8bdc7ef75ae8d95c246af1e8e1f9c7045bd (patch)
tree478c4b892e09f4103061f42052460c50e22ca9b3 /src/test/util/str.h
parent239d199667888e5d60309f15a38eed4d3afe56c4 (diff)
[test] move string helper functions into test library
Diffstat (limited to 'src/test/util/str.h')
-rw-r--r--src/test/util/str.h33
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