From d7a44c2929e16726cbfedcfca87cace4990068a5 Mon Sep 17 00:00:00 2001
From: Simon Rozman <simon@rozman.si>
Date: Sun, 1 Oct 2023 23:17:56 +0200
Subject: [PATCH] string: add strncmp

Signed-off-by: Simon Rozman <simon@rozman.si>
---
 include/stdex/string.hpp | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/include/stdex/string.hpp b/include/stdex/string.hpp
index c647aa5ea..9e9933d5c 100644
--- a/include/stdex/string.hpp
+++ b/include/stdex/string.hpp
@@ -379,6 +379,29 @@ namespace stdex
 		return 0;
 	}
 
+	///
+	/// Binary compare two strings
+	///
+	/// \param[in] str1    String 1
+	/// \param[in] str2    String 2
+	/// \param[in] count   String 1 and 2 code unit count limit
+	///
+	/// \return Negative if str1<str2; positive if str1>str2; zero if str1==str2
+	///
+	template <class T1, class T2>
+	inline int strncmp(_In_reads_or_z_opt_(count) const T1* str1, _In_reads_or_z_opt_(count) const T2* str2, _In_ size_t count)
+	{
+		assert((str1 && str2) || !count);
+		size_t i; T1 a; T2 b;
+		for (i = 0; i < count && ((a = str1[i]) | (b = str2[i])); ++i) {
+			if (a > b) return +1;
+			if (a < b) return -1;
+		}
+		if (i < count && str1[i]) return +1;
+		if (i < count && str2[i]) return -1;
+		return 0;
+	}
+
 	///
 	/// Lexigraphically compare two strings
 	///