gcc 4.1 version of the code also works with other compilers, so make it

default and get rid of #ifdef hell

rangecheck.h

@@ -16,12 +16,9 @@
 __static inline int range_ptrinbuf(const void* buf,size_t len,const void* ptr) {
   register const char* c=(const char*)buf;	/* no pointer arithmetic on void* */
   return (c &&		/* is buf non-NULL? */
-#if (__GNUC__ == 4) && (__GNUC_MINOR__ == 1)
+	  ((uintptr_t)c)+len>(uintptr_t)c &&	/* gcc 4.1 miscompiles without (uintptr_t) */
-	  ((uintptr_t)c)+len>(uintptr_t)c &&	/* gcc 4.1 miscompiles this test */
+			/* catch integer overflows and fail if buffer is 0 bytes long */
-#else
-	  c+len>c &&	/* catch integer overflows and fail if buffer is 0 bytes long */
 			/* because then ptr can't point _in_ the buffer */
-#endif
 	  (uintptr_t)((const char*)ptr-c)<len);	/* this one is a little tricky.
      "ptr-c" checks the offset of ptr in the buffer is inside the buffer size.
      Now, ptr-c can underflow; say it is -1.  When we cast it to uintptr_t, it becomes
@@ -32,11 +29,7 @@ __static inline int range_ptrinbuf(const void* buf,size_t len,const void* ptr) {
  * Check whether buf is NULL, and whether buf+len overflows.
  * Does NOT check whether buf has a non-zero length! */
 __static inline int range_validbuf(const void* buf,size_t len) {
-#if (__GNUC__ == 4) && (__GNUC_MINOR__ == 1)
+  return (buf && (uintptr_t)buf+len>=(uintptr_t)buf);
-  return (buf && (uintptr_t)buf+len>=(uintptr_t)buf);	/* gcc 4.1 miscompiles this test */
-#else
-  return (buf && (const char*)buf+len>=(const char*)buf);
-#endif
 }
 
 /* is buf2[0..len2-1] inside buf1[0..len-1]? */