Fix stream writing to correct position

Signed-off-by: Raul Metsma <raul@metsma.ee>
web-eid · Feb 16, 2025 · a9b5da8 · a9b5da8
1 parent f47fc15
commit a9b5da8
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/lib/libpcsc-cpp/src/utils.cpp b/lib/libpcsc-cpp/src/utils.cpp
@@ -79,8 +79,10 @@ std::ostream& operator<<(std::ostream& os, const pcsc_cpp::byte_vector& data)
 
 std::string operator+(std::string lhs, const byte_vector& rhs)
 {
+    auto pos = lhs.size();
     lhs.reserve(lhs.size() + rhs.size() * 2);
     std::ostringstream hexStringBuilder(std::move(lhs));
+    hexStringBuilder.seekp(std::streamoff(pos));
     hexStringBuilder << rhs;
     return hexStringBuilder.str();
 }