std.cfg: Improved configuration of strftime().

cfg/std.cfg

@@ -4829,6 +4829,7 @@ The obsolete function 'gets' is called. With 'gets' you'll get a buffer overrun
     <leak-ignore/>
     <arg nr="1" direction="out">
       <not-null/>
+      <minsize type="argvalue" arg="2"/>
     </arg>
     <arg nr="2" direction="in">
       <not-uninit/>
@@ -4837,6 +4838,7 @@ The obsolete function 'gets' is called. With 'gets' you'll get a buffer overrun
     <arg nr="3" direction="in">
       <not-null/>
       <not-uninit/>
+      <formatstr/>
     </arg>
     <arg nr="4" direction="in">
       <not-null/>

test/cfg/std.c

@@ -3400,6 +3400,26 @@ void uninitvar_wcscpy(wchar_t *d, wchar_t*s)
     (void)wcscpy(d,s);
 }
 
+size_t bufferAccessOutOfBounds_strftime(char *s, size_t max, const char *fmt, const struct tm *p)
+{
+	char buf[42] = {0};
+    // cppcheck-suppress bufferAccessOutOfBounds
+    (void) strftime(buf,43,fmt,p);
+    (void) strftime(buf,max,fmt,p);
+    return strftime(buf,42,fmt,p);
+}
+
+size_t nullPointer_strftime(char *s, size_t max, const char *fmt, const struct tm *p)
+{
+    // cppcheck-suppress nullPointer
+    (void) strftime(NULL,max,fmt,p);
+    // cppcheck-suppress nullPointer
+    (void) strftime(s,max,NULL,p);
+    // cppcheck-suppress nullPointer
+    (void) strftime(s,max,fmt,NULL);
+    return strftime(s,max,fmt,p);
+}
+
 void uninitvar_strftime(void)
 {
     char *s;

test/cfg/std.cpp

@@ -31,6 +31,17 @@
 #include <iterator>
 #include <vector>
 
+size_t nullPointer_strftime(char *s, size_t max, const char *fmt, const struct tm *p)
+{
+    // cppcheck-suppress nullPointer
+    (void) std::strftime(NULL,max,fmt,p);
+    // cppcheck-suppress nullPointer
+    (void) std::strftime(s,max,NULL,p);
+    // cppcheck-suppress nullPointer
+    (void) std::strftime(s,max,fmt,NULL);
+    return std::strftime(s,max,fmt,p);
+}
+
 size_t bufferAccessOutOfBounds_wcsrtombs(char * dest, const wchar_t ** src, size_t len, mbstate_t * ps)
 {
     char buf[42];