diff options
| -rw-r--r-- | src/util/strencodings.cpp | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/src/util/strencodings.cpp b/src/util/strencodings.cpp index f3d54a2ac9..deabc05de4 100644 --- a/src/util/strencodings.cpp +++ b/src/util/strencodings.cpp @@ -579,13 +579,14 @@ std::string Capitalize(std::string str) std::string HexStr(const Span<const uint8_t> s) { - std::string rv; + std::string rv(s.size() * 2, '\0'); static constexpr char hexmap[16] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' }; - rv.reserve(s.size() * 2); - for (uint8_t v: s) { - rv.push_back(hexmap[v >> 4]); - rv.push_back(hexmap[v & 15]); + auto it = rv.begin(); + for (uint8_t v : s) { + *it++ = hexmap[v >> 4]; + *it++ = hexmap[v & 15]; } + assert(it == rv.end()); return rv; } |