std.cfg: Added support for strcat_s() (since C11).

cfg/std.cfg

@@ -4689,6 +4689,26 @@ The obsolete function 'gets' is called. With 'gets' you'll get a buffer overrun
       <valid>0:</valid>
     </arg>
   </function>
+  <!-- errno_t strcat_s(char *restrict dest, rsize_t destsz, const char *restrict src); // since C11-->
+  <function name="strcat_s">
+    <returnValue type="errno_t"/>
+    <noreturn>false</noreturn>
+    <leak-ignore/>
+    <arg nr="1">
+      <not-null/>
+      <not-uninit/>
+      <strz/>
+      <minsize type="argvalue" arg="2"/>
+    </arg>
+    <arg nr="2">
+      <not-uninit/>
+      <valid>0:</valid>
+    </arg>
+    <arg nr="3">
+      <not-null/>
+      <not-uninit/>
+    </arg>
+  </function>
   <!-- errno_t strncat_s(char *restrict dest, rsize_t destsz, const char *restrict src, rsize_t count); // since C11 -->
   <function name="strncat_s">
     <noreturn>false</noreturn>

test/cfg/std.c

@@ -3026,6 +3026,24 @@ void uninitvar_strncat(char *Ct, char *S, size_t N)
     (void)strncat(Ct,S,N);
 }
 
+void uninitvar_strcat_s(char *Ct, size_t N, char *S)
+{
+    char *ct;
+    char *s;
+    size_t n;
+    // cppcheck-suppress uninitvar
+    (void)strcat_s(ct,n,s);
+    // cppcheck-suppress uninitvar
+    (void)strcat_s(ct,N,S);
+    // cppcheck-suppress uninitvar
+    (void)strcat_s(Ct,N,s);
+    // cppcheck-suppress uninitvar
+    (void)strcat_s(Ct,n,S);
+
+    // no warning is expected for
+    (void)strcat_s(Ct,N,S);
+}
+
 void uninitvar_strncat_s(char *Ct, size_t N1, char *S, size_t N2)
 {
     char *ct;