From cdf592ff891888785c83c768101ff6c75e353fde Mon Sep 17 00:00:00 2001
From: Richard Powell <richard.powell@apple.com>
Date: Sun, 22 Nov 2015 12:34:21 -0800
Subject: [PATCH] Fixing up signed math warnings.

---
 include/string_span.h | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/include/string_span.h b/include/string_span.h
index 250c528..769e2ed 100644
--- a/include/string_span.h
+++ b/include/string_span.h
@@ -109,26 +109,26 @@ inline basic_string_span<T, dynamic_range> ensure_z(T* const & sz, std::ptrdiff_
 // TODO (neilmac) there is probably a better template-magic way to get the const and non-const overloads to share an implementation
 inline basic_string_span<char, dynamic_range> ensure_z(char* const& sz, std::ptrdiff_t max)
 {
-    auto len = strnlen(sz, max);
+    auto len = strnlen(sz, static_cast<size_t>(max));
     Ensures(sz[len] == 0);
     return{ sz, static_cast<std::ptrdiff_t>(len) };
 }
 
 inline basic_string_span<const char, dynamic_range> ensure_z(const char* const& sz, std::ptrdiff_t max)
 {
-    auto len = strnlen(sz, max);
+    auto len = strnlen(sz, static_cast<size_t>(max));
     Ensures(sz[len] == 0); return{ sz, static_cast<std::ptrdiff_t>(len) };
 }
 
 inline basic_string_span<wchar_t, dynamic_range> ensure_z(wchar_t* const& sz, std::ptrdiff_t max)
 {
-    auto len = wcsnlen(sz, max);
+    auto len = wcsnlen(sz, static_cast<size_t>(max));
     Ensures(sz[len] == 0); return{ sz, static_cast<std::ptrdiff_t>(len) };
 }
 
 inline basic_string_span<const wchar_t, dynamic_range> ensure_z(const wchar_t* const& sz, std::ptrdiff_t max)
 {
-    auto len = wcsnlen(sz, max);
+    auto len = wcsnlen(sz, static_cast<size_t>(max));
     Ensures(sz[len] == 0); return{ sz, static_cast<std::ptrdiff_t>(len) };
 }