util: make EncodeBase32 consume Spans

src/netaddress.cpp

@@ -4,10 +4,11 @@
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 #include <netaddress.h>
+
 #include <hash.h>
+#include <tinyformat.h>
 #include <util/strencodings.h>
 #include <util/asmap.h>
-#include <tinyformat.h>
 
 #include <algorithm>
 #include <array>
@@ -341,9 +342,9 @@ enum Network CNetAddr::GetNetwork() const
 std::string CNetAddr::ToStringIP() const
 {
     if (IsTor())
-        return EncodeBase32(m_addr.data(), m_addr.size()) + ".onion";
+        return EncodeBase32(m_addr) + ".onion";
     if (IsInternal())
-        return EncodeBase32(m_addr.data(), m_addr.size()) + ".internal";
+        return EncodeBase32(m_addr) + ".internal";
     CService serv(*this, 0);
     struct sockaddr_storage sockaddr;
     socklen_t socklen = sizeof(sockaddr);

src/util/strencodings.cpp

@@ -201,20 +201,20 @@ std::string DecodeBase64(const std::string& str, bool* pf_invalid)
     return std::string((const char*)vchRet.data(), vchRet.size());
 }
 
-std::string EncodeBase32(const unsigned char* pch, size_t len)
+std::string EncodeBase32(Span<const unsigned char> input)
 {
     static const char *pbase32 = "abcdefghijklmnopqrstuvwxyz234567";
 
     std::string str;
-    str.reserve(((len + 4) / 5) * 8);
-    ConvertBits<8, 5, true>([&](int v) { str += pbase32[v]; }, pch, pch + len);
+    str.reserve(((input.size() + 4) / 5) * 8);
+    ConvertBits<8, 5, true>([&](int v) { str += pbase32[v]; }, input.begin(), input.end());
     while (str.size() % 8) str += '=';
     return str;
 }
 
 std::string EncodeBase32(const std::string& str)
 {
-    return EncodeBase32((const unsigned char*)str.data(), str.size());
+    return EncodeBase32(MakeUCharSpan(str));
 }
 
 std::vector<unsigned char> DecodeBase32(const char* p, bool* pf_invalid)

src/util/strencodings.h

@@ -52,7 +52,7 @@ std::string EncodeBase64(const unsigned char* pch, size_t len);
 std::string EncodeBase64(const std::string& str);
 std::vector<unsigned char> DecodeBase32(const char* p, bool* pf_invalid = nullptr);
 std::string DecodeBase32(const std::string& str, bool* pf_invalid = nullptr);
-std::string EncodeBase32(const unsigned char* pch, size_t len);
+std::string EncodeBase32(Span<const unsigned char> input);
 std::string EncodeBase32(const std::string& str);
 
 void SplitHostPort(std::string in, int& portOut, std::string& hostOut);