posix.cfg: Added overlapping data check for bcopy().

cfg/posix.cfg

@@ -3803,6 +3803,7 @@ The function 'mktemp' is considered to be dangerous due to race conditions and s
   <function name="bcopy">
     <noreturn>false</noreturn>
     <leak-ignore/>
+    <not-overlapping-data ptr1-arg="1" ptr2-arg="2" size-arg="3"/>
     <arg nr="1" direction="in">
       <not-null/>
       <not-uninit/>

test/cfg/posix.c

@@ -29,6 +29,18 @@
 #include <wchar.h>
 #include <string.h>
 
+void overlappingWriteFunction_bcopy(char *buf, const size_t count)
+{
+    // No warning shall be shown:
+    // cppcheck-suppress bcopyCalled
+    bcopy(&buf[0], &buf[3], count); // size is not known
+    // cppcheck-suppress bcopyCalled
+    bcopy(&buf[0], &buf[3], 3U);    // no-overlap
+    // cppcheck-suppress bcopyCalled
+    // cppcheck-suppress overlappingWriteFunction
+    bcopy(&buf[0], &buf[3], 4U);
+}
+
 void overlappingWriteFunction_memccpy(unsigned char *src, unsigned char *dest, int c, size_t count)
 {
     // No warning shall be shown: