From fae29d081af4998823571e0ecc6d4e0c5b8d52eb Mon Sep 17 00:00:00 2001
From: Victor Lyuboslavsky <victor@fleetdm.com>
Date: Mon, 10 Jun 2024 11:07:52 -0500
Subject: [PATCH] Using `std::setprecision` to get the right precision for
 double to string conversion. (#8302)

---
 osquery/utils/conversions/castvariant.h | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/osquery/utils/conversions/castvariant.h b/osquery/utils/conversions/castvariant.h
index b4da4882790..319d3c6702a 100644
--- a/osquery/utils/conversions/castvariant.h
+++ b/osquery/utils/conversions/castvariant.h
@@ -9,7 +9,11 @@
 
 #pragma once
 
-#include <boost/lexical_cast.hpp>
+#include <boost/variant/apply_visitor.hpp>
+#include <boost/variant/static_visitor.hpp>
+#include <boost/variant/variant.hpp>
+#include <iomanip>
+#include <sstream>
 #include <string>
 
 namespace osquery {
@@ -23,7 +27,9 @@ class CastVisitor : public boost::static_visitor<std::string> {
   }
 
   std::string operator()(const double& d) const {
-    std::string s{boost::lexical_cast<std::string>(d)};
+    std::ostringstream ss;
+    ss << std::setprecision(std::numeric_limits<double>::digits10 + 1) << d;
+    std::string s = ss.str();
     if (s.find('.') == std::string::npos) {
       s += ".0";
     }