stdint.h UINTPTR_MAX has the same value as UINT32_MAX for 64-bit platforms

stdint.h UINTPTR_MAX has the same value as UINT32_MAX for 64-bit platforms by Olaf Trygve Berglihn

Closed

as Fixed

Type:	Bug
ID:	721786
Opened:	1/31/2012 5:42:19 AM
Access Restriction:	Public
Moderator Decision:	Sent to Engineering Team for consideration

Workaround(s)

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User(s) can reproduce this bug

On 64-bit platform with 64-bit Visual Studio, I expected UINTPTR_MAX from stdint.h to give more than UINT32_MAX.

Details (expand)

Visual Studio 2010 SP1

#include <stdio.h>
#include <stdint.h>

int main(int argc, char *argv[])
{
    printf("UINTPTR_MAX: %lu\n", UINTPTR_MAX);

    /* We assume it is an error if the address space of a 64-bit code is less
     * or equal to that of a 32-bit code. */
    if((sizeof(void *) == 8) && (UINTPTR_MAX <= UINT32_MAX))
                    fprintf(stderr, "UINTPTR_MAX <= UINT32_MAX\nBug??\n");
    return 0;
}

English

Windows 7

English

UINTPTR_MAX: 4294967295
UINTPTR_MAX <= UINT32_MAX
Bug??

UINTPTR_MAX: 18446744073709551615

0 attachments

Posted by Microsoft on 2/1/2012 at 1:42 PM

Hi,

Thanks for reporting this bug. We've already fixed it (back in June 2011) and the fix will be available in VC11.

stdint.h now says:

#ifdef _WIN64
#define INTPTR_MIN     INT64_MIN
#define INTPTR_MAX     INT64_MAX
#define UINTPTR_MAX     UINT64_MAX
#else /* _WIN64 */
#define INTPTR_MIN     INT32_MIN
#define INTPTR_MAX     INT32_MAX
#define UINTPTR_MAX     UINT32_MAX
#endif /* _WIN64 */

If you have any further questions, feel free to E-mail me at stl@microsoft.com .

Stephan T. Lavavej
Visual C++ Libraries Developer

Posted by MS-Moderator09 [Feedback Moderator] on 1/31/2012 at 9:39 PM

Thank you for submitting feedback on Visual Studio 2010 and .NET Framework. Your issue has been routed to the appropriate VS development team for review. We will contact you if we require any additional information.

Posted by MS-Moderator01 on 1/31/2012 at 6:43 AM

Thank you for your feedback, we are currently reviewing the issue you have submitted. If this issue is urgent, please contact support directly(http://support.microsoft.com)