Merge #17229: tests: Add fuzzing harnesses for various Base{32,58,64} and hex related functions

c18405732e38eadb2c47533c3f982f4605fbfd9a tests: Add fuzzing harness for various hex related functions (practicalswift)
526dd78bedcebcf170ce13349eb3e9fc7fbf39bb tests: Add fuzzing harness for various Base{32,58,64} related functions (practicalswift)
32e27129ff26c7cc10321652d5d2678876081983 util: Move TrimString(...). Introduce default pattern (trims whitespace). Add NODISCARD. (practicalswift)
22d9bae36f2a164acf35765231f1d93364c1c4a9 tests: Add corpora suppression (FUZZERS_MISSING_CORPORA) for fuzzers missing in https://github.com/bitcoin-core/qa-assets/tree/master/fuzz_seed_corpus (practicalswift)

Pull request description:

  Add fuzzing harnesses for various Base{32,58,64} and hex related functions.

  **Testing this PR**

  Run:

  ```
  $ CC=clang CXX=clang++ ./configure --enable-fuzz \
        --with-sanitizers=address,fuzzer,undefined
  $ make
  $ src/test/fuzz/base_encode_decode
  …
  $ src/test/fuzz/hex
  …
  ```

ACKs for top commit:
  MarcoFalke:
    ACK c18405732e38eadb2c47533c3f982f4605fbfd9a 🔁

Tree-SHA512: 4fcbe4f641fc553e43fd5c3c40a6beec0d2ce90c5ffc718213b37fc18aba4c055e51e26f93d01ea1248fd89473d07c9dce77db7f014b47d3abd045f61b5f1905

2 files changed, 11 insertions, 10 deletions

diff --git a/src/util/string.h b/src/util/string.h
index c6fa08e5b..3db8fc8b9 100644
--- a/src/util/string.h
+++ b/src/util/string.h
@@ -11,6 +11,16 @@
 #include <string>
 #include <vector>
 
+NODISCARD inline std::string TrimString(const std::string& str, const std::string& pattern = " \f\n\r\t\v")
+{
+    std::string::size_type front = str.find_first_not_of(pattern);
+    if (front == std::string::npos) {
+        return std::string();
+    }
+    std::string::size_type end = str.find_last_not_of(pattern);
+    return str.substr(front, end - front + 1);
+}
+
 /**
  * Join a list of items
  *
diff --git a/src/util/system.cpp b/src/util/system.cpp
index 563ff6a54..95458672e 100644
--- a/src/util/system.cpp
+++ b/src/util/system.cpp
@@ -7,6 +7,7 @@
 
 #include <chainparamsbase.h>
 #include <util/strencodings.h>
+#include <util/string.h>
 #include <util/translation.h>
 
 
@@ -679,16 +680,6 @@ fs::path GetConfigFile(const std::string& confPath)
     return AbsPathForConfigVal(fs::path(confPath), false);
 }
 
-static std::string TrimString(const std::string& str, const std::string& pattern)
-{
-    std::string::size_type front = str.find_first_not_of(pattern);
-    if (front == std::string::npos) {
-        return std::string();
-    }
-    std::string::size_type end = str.find_last_not_of(pattern);
-    return str.substr(front, end - front + 1);
-}
-
 static bool GetConfigOptions(std::istream& stream, const std::string& filepath, std::string& error, std::vector<std::pair<std::string, std::string>>& options, std::list<SectionInfo>& sections)
 {
     std::string str, prefix;