std.cfg: Improved configuration for wcsrtombs().

cfg/std.cfg

@@ -5331,7 +5331,9 @@ The obsolete function 'gets' is called. With 'gets' you'll get a buffer overrun
     <returnValue type="size_t"/>
     <noreturn>false</noreturn>
     <leak-ignore/>
-    <arg nr="1" direction="out"/>
+    <arg nr="1" direction="out">
+      <minsize type="argvalue" arg="3"/>
+    </arg>
     <arg nr="2" direction="in">
       <not-null/>
       <not-uninit/>

test/cfg/std.c

@@ -25,6 +25,15 @@
 #include <inttypes.h>
 #include <float.h>
 
+size_t bufferAccessOutOfBounds_wcsrtombs(char * dest, const wchar_t ** src, size_t len, mbstate_t * ps)
+{
+    char buf[42];
+    (void)wcsrtombs(buf,src,42,ps);
+    // cppcheck-suppress bufferAccessOutOfBounds
+    (void)wcsrtombs(buf,src,43,ps);
+    return wcsrtombs(dest,src,len,ps);
+}
+
 void bufferAccessOutOfBounds(void)
 {
     char a[5];

test/cfg/std.cpp

@@ -31,6 +31,15 @@
 #include <iterator>
 #include <vector>
 
+size_t bufferAccessOutOfBounds_wcsrtombs(char * dest, const wchar_t ** src, size_t len, mbstate_t * ps)
+{
+    char buf[42];
+    (void)std::wcsrtombs(buf,src,42,ps);
+    // cppcheck-suppress bufferAccessOutOfBounds
+    (void)std::wcsrtombs(buf,src,43,ps);
+    return std::wcsrtombs(dest,src,len,ps);
+}
+
 void invalidFunctionArg_std_string_substr(const std::string &str, std::size_t pos, std::size_t len) {
     // cppcheck-suppress invalidFunctionArg
     (void)str.substr(-1,len);