util: Move util/string.h functions to util namespace

There are no changes to behavior. Changes in this commit are all additions, and
are easiest to review using "git diff -U0 --word-diff-regex=." options.

Motivation for this change is to keep util functions with really generic names
like "Split" and "Join" out of the global namespace so it is easier to see
where these functions are defined, and so they don't interfere with function
overloading, especially since the util library is a dependency of the kernel
library and intended to be used with external code.

src/base58.cpp

@@ -14,6 +14,8 @@
 
 #include <limits>
 
+using util::ContainsNoNUL;
+
 /** All alphanumeric characters except for "0", "I", "O", and "l" */
 static const char* pszBase58 = "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz";
 static const int8_t mapBase58[256] = {

src/bench/bench.cpp

@@ -18,6 +18,7 @@
 #include <vector>
 
 using namespace std::chrono_literals;
+using util::Join;
 
 const std::function<void(const std::string&)> G_TEST_LOG_FUN{};
 

src/bench/bench_bitcoin.cpp

@@ -16,6 +16,8 @@
 #include <sstream>
 #include <vector>
 
+using util::SplitString;
+
 static const char* DEFAULT_BENCH_FILTER = ".*";
 static constexpr int64_t DEFAULT_MIN_TIME_MS{10};
 /** Priority level default value, run "all" priority levels */

src/bitcoin-cli.cpp

@@ -42,6 +42,9 @@
 #include <event2/keyvalq_struct.h>
 #include <support/events.h>
 
+using util::Join;
+using util::ToString;
+
 // The server returns time values from a mockable system clock, but it is not
 // trivial to get the mocked time from the server, nor is it needed for now, so
 // just use a plain system_clock.

src/bitcoin-tx.cpp

@@ -32,6 +32,11 @@
 #include <functional>
 #include <memory>
 
+using util::SplitString;
+using util::ToString;
+using util::TrimString;
+using util::TrimStringView;
+
 static bool fCreateBlank;
 static std::map<std::string,UniValue> registers;
 static const int CONTINUE_EXECUTION=-1;

src/bitcoin-wallet.cpp

@@ -24,6 +24,8 @@
 #include <string>
 #include <tuple>
 
+using util::Join;
+
 const std::function<std::string(const char*)> G_TRANSLATION_FUN = nullptr;
 
 static void SetupWalletToolArgs(ArgsManager& argsman)

src/blockfilter.cpp

@@ -16,6 +16,8 @@
 #include <util/golombrice.h>
 #include <util/string.h>
 
+using util::Join;
+
 static const std::map<BlockFilterType, std::string> g_filter_types = {
     {BlockFilterType::BASIC, "basic"},
 };

src/chainparams.cpp

@@ -21,6 +21,8 @@
 #include <stdexcept>
 #include <vector>
 
+using util::SplitString;
+
 void ReadSigNetArgs(const ArgsManager& args, CChainParams::SigNetOptions& options)
 {
     if (args.IsArgSet("-signetseednode")) {

src/clientversion.cpp

@@ -13,6 +13,8 @@
 #include <string>
 #include <vector>
 
+using util::Join;
+
 /**
  * Name of client reported in the 'version' message. Report the same name
  * for both bitcoind and bitcoin-qt, to make it harder for attackers to

src/common/config.cpp

@@ -27,6 +27,9 @@
 #include <utility>
 #include <vector>
 
+using util::TrimString;
+using util::TrimStringView;
+
 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;

src/common/messages.cpp

@@ -20,6 +20,7 @@
 #include <vector>
 
 using node::TransactionError;
+using util::Join;
 
 namespace common {
 std::string StringForFeeReason(FeeReason reason)

src/common/system.cpp

@@ -28,6 +28,8 @@
 #include <string>
 #include <thread>
 
+using util::ReplaceAll;
+
 // Application startup time (used for uptime calculation)
 const int64_t nStartupTime = GetTime();
 

src/core_read.cpp

@@ -16,6 +16,8 @@
 #include <algorithm>
 #include <string>
 
+using util::SplitString;
+
 namespace {
 class OpCodeParser
 {

src/httprpc.cpp

@@ -23,6 +23,9 @@
 #include <string>
 #include <vector>
 
+using util::SplitString;
+using util::TrimStringView;
+
 /** WWW-Authenticate to present with 401 Unauthorized response */
 static const char* WWW_AUTH_HEADER_DATA = "Basic realm=\"jsonrpc\"";
 

src/i2p.cpp

@@ -26,6 +26,8 @@
 #include <stdexcept>
 #include <string>
 
+using util::Split;
+
 namespace i2p {
 
 /**

src/init.cpp

@@ -137,6 +137,9 @@ using node::NodeContext;
 using node::ShouldPersistMempool;
 using node::ImportBlocks;
 using node::VerifyLoadedChainstate;
+using util::Join;
+using util::ReplaceAll;
+using util::ToString;
 
 static constexpr bool DEFAULT_PROXYRANDOMIZE{true};
 static constexpr bool DEFAULT_REST_ENABLE{false};

src/init/common.cpp

@@ -20,6 +20,8 @@
 #include <string>
 #include <vector>
 
+using util::SplitString;
+
 namespace init {
 void AddLoggingArgs(ArgsManager& argsman)
 {

src/logging.cpp

@@ -13,6 +13,10 @@
 #include <map>
 #include <optional>
 
+using util::Join;
+using util::RemovePrefix;
+using util::ToString;
+
 const char * const DEFAULT_DEBUGLOGFILE = "debug.log";
 constexpr auto MAX_USER_SETABLE_SEVERITY_LEVEL{BCLog::Level::Info};
 

src/logging.h

@@ -189,7 +189,7 @@ namespace BCLog {
         /** Returns a string with the log categories in alphabetical order. */
         std::string LogCategoriesString() const
         {
-            return Join(LogCategoriesList(), ", ", [&](const LogCategory& i) { return i.category; });
+            return util::Join(LogCategoriesList(), ", ", [&](const LogCategory& i) { return i.category; });
         };
 
         //! Returns a string with all user-selectable log levels.

src/netaddress.cpp

@@ -20,6 +20,9 @@
 #include <iterator>
 #include <tuple>
 
+using util::ContainsNoNUL;
+using util::HasPrefix;
+
 CNetAddr::BIP155Network CNetAddr::GetBIP155Network() const
 {
     switch (m_net) {

src/netaddress.h

@@ -448,7 +448,7 @@ private:
             // Recognize NET_INTERNAL embedded in IPv6, such addresses are not
             // gossiped but could be coming from addrman, when unserializing from
             // disk.
-            if (HasPrefix(m_addr, INTERNAL_IN_IPV6_PREFIX)) {
+            if (util::HasPrefix(m_addr, INTERNAL_IN_IPV6_PREFIX)) {
                 m_net = NET_INTERNAL;
                 memmove(m_addr.data(), m_addr.data() + INTERNAL_IN_IPV6_PREFIX.size(),
                         ADDR_INTERNAL_SIZE);
@@ -456,8 +456,8 @@ private:
                 return;
             }
 
-            if (!HasPrefix(m_addr, IPV4_IN_IPV6_PREFIX) &&
-                !HasPrefix(m_addr, TORV2_IN_IPV6_PREFIX)) {
+            if (!util::HasPrefix(m_addr, IPV4_IN_IPV6_PREFIX) &&
+                !util::HasPrefix(m_addr, TORV2_IN_IPV6_PREFIX)) {
                 return;
             }
 

src/netbase.cpp

@@ -27,6 +27,8 @@
 #include <sys/un.h>
 #endif
 
+using util::ContainsNoNUL;
+
 // Settings
 static GlobalMutex g_proxyinfo_mutex;
 static Proxy proxyInfo[NET_MAX] GUARDED_BY(g_proxyinfo_mutex);

src/node/interface_ui.cpp

@@ -10,6 +10,8 @@
 #include <boost/signals2/optional_last_value.hpp>
 #include <boost/signals2/signal.hpp>
 
+using util::MakeUnorderedList;
+
 CClientUIInterface uiInterface;
 
 struct UISignals {

src/node/interfaces.cpp

@@ -71,6 +71,7 @@ using interfaces::Handler;
 using interfaces::MakeSignalHandler;
 using interfaces::Node;
 using interfaces::WalletLoader;
+using util::Join;
 
 namespace node {
 // All members of the classes in this namespace are intentionally public, as the

src/node/kernel_notifications.cpp

@@ -24,6 +24,8 @@
 #include <string>
 #include <thread>
 
+using util::ReplaceAll;
+
 static void AlertNotify(const std::string& strMessage)
 {
     uiInterface.NotifyAlertChanged();

src/qt/bitcoin.cpp

@@ -85,6 +85,8 @@ Q_DECLARE_METATYPE(uint256)
 Q_DECLARE_METATYPE(wallet::AddressPurpose)
 #endif // ENABLE_WALLET
 
+using util::MakeUnorderedList;
+
 static void RegisterMetaTypes()
 {
     // Register meta types used for QMetaObject::invokeMethod and Qt::QueuedConnection

src/qt/recentrequeststablemodel.cpp

@@ -20,6 +20,8 @@
 #include <QLatin1Char>
 #include <QLatin1String>
 
+using util::ToString;
+
 RecentRequestsTableModel::RecentRequestsTableModel(WalletModel *parent) :
     QAbstractTableModel(parent), walletModel(parent)
 {

src/qt/rpcconsole.cpp

@@ -48,6 +48,8 @@
 
 #include <chrono>
 
+using util::Join;
+
 const int CONSOLE_HISTORY = 50;
 const int INITIAL_TRAFFIC_GRAPH_MINS = 30;
 const QSize FONT_RANGE(4, 40);

src/qt/walletcontroller.cpp

@@ -30,6 +30,7 @@
 #include <QTimer>
 #include <QWindow>
 
+using util::Join;
 using wallet::WALLET_FLAG_BLANK_WALLET;
 using wallet::WALLET_FLAG_DESCRIPTORS;
 using wallet::WALLET_FLAG_DISABLE_PRIVATE_KEYS;

src/rest.cpp

@@ -39,6 +39,7 @@
 
 using node::GetTransaction;
 using node::NodeContext;
+using util::SplitString;
 
 static const size_t MAX_GETUTXOS_OUTPOINTS = 15; //allow a max of 15 outpoints to be queried at once
 static constexpr unsigned int MAX_REST_HEADERS_RESULTS = 2000;

src/rpc/blockchain.cpp

@@ -60,6 +60,9 @@ using kernel::CoinStatsHashType;
 using node::BlockManager;
 using node::NodeContext;
 using node::SnapshotMetadata;
+using util::Join;
+using util::MakeUnorderedList;
+using util::ToString;
 
 struct CUpdatedBlock
 {

src/rpc/mempool.cpp

@@ -34,6 +34,7 @@ using node::DEFAULT_MAX_RAW_TX_FEE_RATE;
 using node::MempoolPath;
 using node::NodeContext;
 using node::TransactionError;
+using util::ToString;
 
 static RPCHelpMan sendrawtransaction()
 {

src/rpc/mining.cpp

@@ -47,6 +47,7 @@ using node::CBlockTemplate;
 using node::NodeContext;
 using node::RegenerateCommitments;
 using node::UpdateTime;
+using util::ToString;
 
 /**
  * Return average network hashes per second based on the last 'lookup' blocks,

src/rpc/net.cpp

@@ -35,6 +35,8 @@
 #include <univalue.h>
 
 using node::NodeContext;
+using util::Join;
+using util::TrimString;
 
 const std::vector<std::string> CONNECTION_TYPE_DOC{
         "outbound-full-relay (default automatic connections)",

src/rpc/server.cpp

@@ -27,6 +27,8 @@
 #include <mutex>
 #include <unordered_map>
 
+using util::SplitString;
+
 static GlobalMutex g_rpc_warmup_mutex;
 static std::atomic<bool> g_rpc_running{false};
 static bool fRPCInWarmup GUARDED_BY(g_rpc_warmup_mutex) = true;

src/rpc/util.cpp

@@ -37,6 +37,9 @@ using common::PSBTError;
 using common::PSBTErrorString;
 using common::TransactionErrorString;
 using node::TransactionError;
+using util::Join;
+using util::SplitString;
+using util::TrimString;
 
 const std::string UNIX_EPOCH_TIME = "UNIX epoch time";
 const std::string EXAMPLE_ADDRESS[2] = {"bc1q09vm5lfy0j5reeulh4x5752q25uqqvz34hufdl", "bc1q02ad21edsxd23d32dfgqqsz4vv4nmtfzuklhy3"};
@@ -796,7 +799,7 @@ std::string RPCHelpMan::ToString() const
         if (arg.m_opts.hidden) break; // Any arg that follows is also hidden
 
         // Push named argument name and description
-        sections.m_sections.emplace_back(::ToString(i + 1) + ". " + arg.GetFirstName(), arg.ToDescriptionString(/*is_named_arg=*/true));
+        sections.m_sections.emplace_back(util::ToString(i + 1) + ". " + arg.GetFirstName(), arg.ToDescriptionString(/*is_named_arg=*/true));
         sections.m_max_pad = std::max(sections.m_max_pad, sections.m_sections.back().m_left.size());
 
         // Recursively push nested args

src/script/descriptor.cpp

@@ -27,6 +27,8 @@
 #include <string>
 #include <vector>
 
+using util::Split;
+
 namespace {
 
 ////////////////////////////////////////////////////////////////////////////

src/script/miniscript.h

@@ -863,8 +863,8 @@ public:
                     if (!key_str) return {};
                     return std::move(ret) + "pk_h(" + std::move(*key_str) + ")";
                 }
-                case Fragment::AFTER: return std::move(ret) + "after(" + ::ToString(node.k) + ")";
-                case Fragment::OLDER: return std::move(ret) + "older(" + ::ToString(node.k) + ")";
+                case Fragment::AFTER: return std::move(ret) + "after(" + util::ToString(node.k) + ")";
+                case Fragment::OLDER: return std::move(ret) + "older(" + util::ToString(node.k) + ")";
                 case Fragment::HASH256: return std::move(ret) + "hash256(" + HexStr(node.data) + ")";
                 case Fragment::HASH160: return std::move(ret) + "hash160(" + HexStr(node.data) + ")";
                 case Fragment::SHA256: return std::move(ret) + "sha256(" + HexStr(node.data) + ")";
@@ -883,7 +883,7 @@ public:
                     return std::move(ret) + "andor(" + std::move(subs[0]) + "," + std::move(subs[1]) + "," + std::move(subs[2]) + ")";
                 case Fragment::MULTI: {
                     CHECK_NONFATAL(!is_tapscript);
-                    auto str = std::move(ret) + "multi(" + ::ToString(node.k);
+                    auto str = std::move(ret) + "multi(" + util::ToString(node.k);
                     for (const auto& key : node.keys) {
                         auto key_str = ctx.ToString(key);
                         if (!key_str) return {};
@@ -893,7 +893,7 @@ public:
                 }
                 case Fragment::MULTI_A: {
                     CHECK_NONFATAL(is_tapscript);
-                    auto str = std::move(ret) + "multi_a(" + ::ToString(node.k);
+                    auto str = std::move(ret) + "multi_a(" + util::ToString(node.k);
                     for (const auto& key : node.keys) {
                         auto key_str = ctx.ToString(key);
                         if (!key_str) return {};
@@ -902,7 +902,7 @@ public:
                     return std::move(str) + ")";
                 }
                 case Fragment::THRESH: {
-                    auto str = std::move(ret) + "thresh(" + ::ToString(node.k);
+                    auto str = std::move(ret) + "thresh(" + util::ToString(node.k);
                     for (auto& sub : subs) {
                         str += "," + std::move(sub);
                     }

src/test/addrman_tests.cpp

@@ -22,6 +22,7 @@
 
 using namespace std::literals;
 using node::NodeContext;
+using util::ToString;
 
 static NetGroupManager EMPTY_NETGROUPMAN{std::vector<bool>()};
 static const bool DETERMINISTIC{true};

src/test/argsman_tests.cpp

@@ -20,6 +20,8 @@
 
 #include <boost/test/unit_test.hpp>
 
+using util::ToString;
+
 BOOST_FIXTURE_TEST_SUITE(argsman_tests, BasicTestingSetup)
 
 BOOST_AUTO_TEST_CASE(util_datadir)

src/test/blockchain_tests.cpp

@@ -11,6 +11,8 @@
 
 #include <cstdlib>
 
+using util::ToString;
+
 /* Equality between doubles is imprecise. Comparison should be done
  * with a small threshold of tolerance, rather than exact equality.
  */

src/test/dbwrapper_tests.cpp

@@ -12,6 +12,8 @@
 
 #include <boost/test/unit_test.hpp>
 
+using util::ToString;
+
 // Test if a string consists entirely of null characters
 static bool is_null_key(const std::vector<unsigned char>& key) {
     bool isnull = true;

src/test/descriptor_tests.cpp

@@ -15,6 +15,8 @@
 #include <string>
 #include <vector>
 
+using util::Split;
+
 namespace {
 
 void CheckUnparsable(const std::string& prv, const std::string& pub, const std::string& expected_error)

src/test/fuzz/base_encode_decode.cpp

@@ -14,6 +14,9 @@
 #include <string>
 #include <vector>
 
+using util::TrimString;
+using util::TrimStringView;
+
 FUZZ_TARGET(base_encode_decode)
 {
     const std::string random_encoded_string(buffer.begin(), buffer.end());

src/test/fuzz/integer.cpp

@@ -40,6 +40,8 @@
 #include <set>
 #include <vector>
 
+using util::ToString;
+
 void initialize_integer()
 {
     SelectParams(ChainType::REGTEST);

src/test/fuzz/locale.cpp

@@ -51,7 +51,7 @@ FUZZ_TARGET(locale)
     int64_t parseint64_out_without_locale;
     const bool parseint64_without_locale = ParseInt64(random_string, &parseint64_out_without_locale);
     const int64_t random_int64 = fuzzed_data_provider.ConsumeIntegral<int64_t>();
-    const std::string tostring_without_locale = ToString(random_int64);
+    const std::string tostring_without_locale = util::ToString(random_int64);
     // The variable `random_int32` is no longer used, but the harness still needs to
     // consume the same data that it did previously to not invalidate existing seeds.
     const int32_t random_int32 = fuzzed_data_provider.ConsumeIntegral<int32_t>();
@@ -75,7 +75,7 @@ FUZZ_TARGET(locale)
     if (parseint64_without_locale) {
         assert(parseint64_out_without_locale == parseint64_out_with_locale);
     }
-    const std::string tostring_with_locale = ToString(random_int64);
+    const std::string tostring_with_locale = util::ToString(random_int64);
     assert(tostring_without_locale == tostring_with_locale);
     const std::string strprintf_int_with_locale = strprintf("%d", random_int64);
     assert(strprintf_int_without_locale == strprintf_int_with_locale);

src/test/fuzz/rpc.cpp

@@ -36,6 +36,9 @@
 #include <vector>
 enum class ChainType;
 
+using util::Join;
+using util::ToString;
+
 namespace {
 struct RPCFuzzTestingSetup : public TestingSetup {
     RPCFuzzTestingSetup(const ChainType chain_type, const std::vector<const char*>& extra_args) : TestingSetup{chain_type, extra_args}

src/test/fuzz/script_assets_test_minimizer.cpp

@@ -17,6 +17,8 @@
 #include <string>
 #include <vector>
 
+using util::SplitString;
+
 // This fuzz "test" can be used to minimize test cases for script_assets_test in
 // src/test/script_tests.cpp. While it written as a fuzz test, and can be used as such,
 // fuzzing the inputs is unlikely to construct useful test cases.

src/test/fuzz/script_parsing.cpp

@@ -7,6 +7,8 @@
 #include <test/fuzz/fuzz.h>
 #include <util/string.h>
 
+using util::Split;
+
 FUZZ_TARGET(script_parsing)
 {
     FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());

src/test/fuzz/string.cpp

@@ -40,6 +40,11 @@ using common::AmountErrMsg;
 using common::AmountHighWarn;
 using common::FeeModeFromString;
 using common::ResolveErrMsg;
+using util::ContainsNoNUL;
+using util::Join;
+using util::RemovePrefix;
+using util::SplitString;
+using util::TrimString;
 
 FUZZ_TARGET(string)
 {

src/test/fuzz/tx_pool.cpp

@@ -21,6 +21,7 @@
 
 using node::BlockAssembler;
 using node::NodeContext;
+using util::ToString;
 
 namespace {
 

src/test/getarg_tests.cpp

@@ -16,6 +16,8 @@
 
 #include <boost/test/unit_test.hpp>
 
+using util::SplitString;
+
 BOOST_FIXTURE_TEST_SUITE(getarg_tests, BasicTestingSetup)
 
 void ResetArgs(ArgsManager& local_args, const std::string& strArg)

src/test/key_tests.cpp

@@ -18,6 +18,8 @@
 
 #include <boost/test/unit_test.hpp>
 
+using util::ToString;
+
 static const std::string strSecret1 = "5HxWvvfubhXpYYpS3tJkw6fq9jE9j18THftkZjHHfmFiWtmAbrj";
 static const std::string strSecret2 = "5KC4ejrDjv152FGwP386VD1i2NYc5KkfSMyv1nGy1VGDxGHqVY3";
 static const std::string strSecret1C = "Kwr371tjA9u2rFSMZjTNun2PXXP3WPZu2afRHTcta6KxEUdm1vEw";

src/test/logging_tests.cpp

@@ -17,6 +17,9 @@
 
 #include <boost/test/unit_test.hpp>
 
+using util::SplitString;
+using util::TrimString;
+
 BOOST_FIXTURE_TEST_SUITE(logging_tests, BasicTestingSetup)
 
 static void ResetLogger()

src/test/net_tests.cpp

@@ -32,6 +32,7 @@
 #include <string>
 
 using namespace std::literals;
+using util::ToString;
 
 BOOST_FIXTURE_TEST_SUITE(net_tests, RegTestingSetup)
 

src/test/rpc_tests.cpp

@@ -17,6 +17,8 @@
 
 #include <boost/test/unit_test.hpp>
 
+using util::SplitString;
+
 static UniValue JSON(std::string_view json)
 {
     UniValue value;

src/test/settings_tests.cpp

@@ -21,6 +21,8 @@
 #include <system_error>
 #include <vector>
 
+using util::ToString;
+
 inline bool operator==(const common::SettingsValue& a, const common::SettingsValue& b)
 {
     return a.write() == b.write();

src/test/transaction_tests.cpp

@@ -38,6 +38,9 @@
 
 #include <univalue.h>
 
+using util::SplitString;
+using util::ToString;
+
 typedef std::vector<unsigned char> valtype;
 
 static CFeeRate g_dust{DUST_RELAY_TX_FEE};

src/test/util_tests.cpp

@@ -45,6 +45,15 @@
 #include <boost/test/unit_test.hpp>
 
 using namespace std::literals;
+using util::Join;
+using util::RemovePrefix;
+using util::RemovePrefixView;
+using util::ReplaceAll;
+using util::Split;
+using util::SplitString;
+using util::TrimString;
+using util::TrimStringView;
+
 static const std::string STRING_WITH_EMBEDDED_NULL_CHAR{"1"s "\0" "1"s};
 
 /* defined in logging.cpp */

src/test/util_threadnames_tests.cpp

@@ -15,6 +15,8 @@
 
 #include <boost/test/unit_test.hpp>
 
+using util::ToString;
+
 BOOST_AUTO_TEST_SUITE(util_threadnames_tests)
 
 const std::string TEST_THREAD_NAME_BASE = "test_thread.";

src/torcontrol.cpp

@@ -42,6 +42,10 @@
 #include <event2/thread.h>
 #include <event2/util.h>
 
+using util::ReplaceAll;
+using util::SplitString;
+using util::ToString;
+
 /** Default control ip and port */
 const std::string DEFAULT_TOR_CONTROL = "127.0.0.1:" + ToString(DEFAULT_TOR_CONTROL_PORT);
 /** Tor cookie size (from control-spec.txt) */

src/util/moneystr.cpp

@@ -13,6 +13,9 @@
 #include <cstdint>
 #include <optional>
 
+using util::ContainsNoNUL;
+using util::TrimString;
+
 std::string FormatMoney(const CAmount n)
 {
     // Note: not using straight sprintf here because we do NOT want

src/util/strencodings.h

@@ -122,7 +122,7 @@ T LocaleIndependentAtoi(std::string_view str)
     static_assert(std::is_integral<T>::value);
     T result;
     // Emulate atoi(...) handling of white space and leading +/-.
-    std::string_view s = TrimStringView(str);
+    std::string_view s = util::TrimStringView(str);
     if (!s.empty() && s[0] == '+') {
         if (s.length() >= 2 && s[1] == '-') {
             return 0;

src/util/string.cpp

@@ -7,8 +7,10 @@
 #include <regex>
 #include <string>
 
+namespace util {
 void ReplaceAll(std::string& in_out, const std::string& search, const std::string& substitute)
 {
     if (search.empty()) return;
     in_out = std::regex_replace(in_out, std::regex(search), substitute);
 }
+} // namespace util

src/util/string.h

@@ -16,6 +16,7 @@
 #include <string_view> // IWYU pragma: export
 #include <vector>
 
+namespace util {
 void ReplaceAll(std::string& in_out, const std::string& search, const std::string& substitute);
 
 /** Split a string on any char found in separators, returning a vector.
@@ -162,5 +163,6 @@ template <typename T1, size_t PREFIX_LEN>
     return obj.size() >= PREFIX_LEN &&
            std::equal(std::begin(prefix), std::end(prefix), std::begin(obj));
 }
+} // namespace util
 
 #endif // BITCOIN_UTIL_STRING_H

src/wallet/load.cpp

@@ -21,6 +21,8 @@
 
 #include <system_error>
 
+using util::Join;
+
 namespace wallet {
 bool VerifyWallets(WalletContext& context)
 {

src/wallet/rpc/backup.cpp

@@ -34,6 +34,7 @@
 
 
 using interfaces::FoundBlock;
+using util::SplitString;
 
 namespace wallet {
 std::string static EncodeDumpString(const std::string &str) {

src/wallet/scriptpubkeyman.cpp

@@ -22,6 +22,7 @@
 #include <optional>
 
 using common::PSBTError;
+using util::ToString;
 
 namespace wallet {
 //! Value for the first BIP 32 hardened derivation. Can be used as a bit mask and as a value. See BIP 32 for more details.

src/wallet/transaction.h

@@ -273,7 +273,7 @@ public:
 
         mapValueCopy["fromaccount"] = "";
         if (nOrderPos != -1) {
-            mapValueCopy["n"] = ToString(nOrderPos);
+            mapValueCopy["n"] = util::ToString(nOrderPos);
         }
         if (nTimeSmart) {
             mapValueCopy["timesmart"] = strprintf("%u", nTimeSmart);

src/wallet/wallet.cpp

@@ -86,6 +86,8 @@ using common::AmountErrMsg;
 using common::AmountHighWarn;
 using common::PSBTError;
 using interfaces::FoundBlock;
+using util::ReplaceAll;
+using util::ToString;
 
 namespace wallet {