safestring: align str rsize with the mem rsize

The original library departed from standard and set
different RSIZE_STR_MAX to 4K and RSIZE_MEM_MAX to 256M

The original comment doesn't explain why this decision
was done.

/*
 * We depart from the standard and allow memory and string operations to
 * have different max sizes. See the respective safe_mem_lib.h or
 * safe_str_lib.h files.
 */

In this change we allign both RSIZE_STR_MAX and RSIZE_MEM_MAX
to same 256M size via standard RSIZE_MAX

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>

Author: Tomas Winkler

include/safe_lib.h

@@ -32,12 +32,16 @@ extern "C" {
 typedef size_t  rsize_t;
 
 /*
+ * This is the original library decision:
  * We depart from the standard and allow memory and string operations to
  * have different max sizes. See the respective safe_mem_lib.h or
  * safe_str_lib.h files.
  */
 /* #define RSIZE_MAX (~(rsize_t)0)  - leave here for completeness */
 
+/* Bring back the standard */
+#define RSIZE_MAX        ( 256UL << 20 )     /* 256MB */
+
 typedef void (*constraint_handler_t) (const char * /* msg */,
                                       void *       /* ptr */,
                                       errno_t      /* error */);

include/safe_mem_lib.h

@@ -11,7 +11,7 @@
 #include "safe_lib.h"
 #include <wchar.h>
 
-#define RSIZE_MAX_MEM      ( 256UL << 20 )     /* 256MB */
+#define RSIZE_MAX_MEM      ( RSIZE_MAX )
 #define RSIZE_MAX_MEM16    ( RSIZE_MAX_MEM/2 )
 #define RSIZE_MAX_MEM32    ( RSIZE_MAX_MEM/4 )
 

include/safe_str_lib.h

@@ -16,7 +16,7 @@
 #define RSIZE_MIN_STR      ( 1 )
 
 /* maximum sring length */
-#define RSIZE_MAX_STR      ( 4UL << 10 )      /* 4KB */
+#define RSIZE_MAX_STR      ( RSIZE_MAX )
 
 
 /* The makeup of a password */