From f62d9d585324de5ecfc347a46a1ed0eb96b11c1e Mon Sep 17 00:00:00 2001
From: orbitcowboy <orbitcowboy@web.de>
Date: Tue, 13 Apr 2021 19:13:00 +0200
Subject: [PATCH] std.cfg: Fixed bufferAccessOutOfBounds false negative for
 strncmp().

---
 cfg/std.cfg    |  4 ++++
 test/cfg/std.c | 11 +++++++++++
 2 files changed, 15 insertions(+)

diff --git a/cfg/std.cfg b/cfg/std.cfg
index 96fcc9a47..95a1504c3 100644
--- a/cfg/std.cfg
+++ b/cfg/std.cfg
@@ -5000,10 +5000,14 @@ The obsolete function 'gets' is called. With 'gets' you'll get a buffer overrun
     <arg nr="1" direction="in">
       <not-null/>
       <not-uninit/>
+      <strz/>
+      <minsize type="argvalue" arg="3"/>
     </arg>
     <arg nr="2" direction="in">
       <not-null/>
       <not-uninit/>
+      <strz/>
+      <minsize type="argvalue" arg="3"/>
     </arg>
     <arg nr="3" direction="in">
       <not-uninit/>
diff --git a/test/cfg/std.c b/test/cfg/std.c
index a5e60d3f1..49bc0f43f 100644
--- a/test/cfg/std.c
+++ b/test/cfg/std.c
@@ -3561,6 +3561,17 @@ void bufferAccessOutOfBounds_strxfrm(void)
     (void)strxfrm(dest,src,3);
 }
 
+void bufferAccessOutOfBounds_strncmp(void)
+{
+    const char src[3] = "abc";
+    char dest[1] = "a";
+    (void)strncmp(dest,src,1);
+    // cppcheck-suppress bufferAccessOutOfBounds
+    (void)strncmp(dest,src,2);
+    // cppcheck-suppress bufferAccessOutOfBounds
+    (void)strncmp(dest,src,3);
+}
+
 void uninitvar_wcsxfrm(void)
 {
     wchar_t *ds;