Validate range in wincolor_sink::print_range_

5 years ago · 4a5bc41e89
parent 0ade18828d
commit 4a5bc41e89
1 changed files with 6 additions and 3 deletions
--- a/include/spdlog/sinks/wincolor_sink-inl.h
+++ b/include/spdlog/sinks/wincolor_sink-inl.h
@ -144,9 +144,12 @@ std::uint16_t SPDLOG_INLINE wincolor_sink<ConsoleMutex>::set_foreground_color_(s
 template<typename ConsoleMutex>
 void SPDLOG_INLINE wincolor_sink<ConsoleMutex>::print_range_(const memory_buf_t &formatted, size_t start, size_t end)
 {
+    if (end > start)
+    {
        auto size = static_cast<DWORD>(end - start);
        auto ignored = ::WriteConsoleA(static_cast<HANDLE>(out_handle_), formatted.data() + start, size, nullptr, nullptr);
        (void)(ignored);
+    }
 }

 template<typename ConsoleMutex>