From 8f0c0cfabd3c5f9b2d23fd43da76897ae6e47859 Mon Sep 17 00:00:00 2001
From: Peter Edwards <peadar@arista.com>
Date: Sat, 19 Aug 2023 16:32:08 +0100
Subject: [PATCH] Do proper handling of signed/unsigned types when parsing
 flags.

---
 libpstack/flags.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/libpstack/flags.h b/libpstack/flags.h
index ea50507..78fe1d1 100644
--- a/libpstack/flags.h
+++ b/libpstack/flags.h
@@ -11,7 +11,11 @@
 namespace {
 template <typename T> void convert(const char *opt, T &to) {
    if constexpr (std::is_integral<T>::value)
-      to = strtol(opt, 0, 0);
+      if constexpr (std::is_signed<T>::value)
+          to = T(strtoll(opt, 0, 0));
+      else
+          to = T(strtoull(opt, 0, 0));
+
    else if constexpr (std::is_floating_point<T>::value)
       to = strtod(opt, 0);
    else