Need VS2008 Verification

This is a discussion on Need VS2008 Verification within the C++ Programming forums, part of the General Programming Boards category; OK, I've been banging my head over what appears to be some weird behavior in the CRT under VS2008 (debug ...

  1. #1
    a_capitalist_story
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    Need VS2008 Verification

    OK, I've been banging my head over what appears to be some weird behavior in the CRT under VS2008 (debug mode). Here's the code:
    Code:
    const time_t timeStamp = 1223939307;
    char qs[256] = { 0 };
    int actualLen = sprintf_s(qs, sizeof(qs), "%lu----%s---", timeStamp, "rukiddingme?");
    Yields (in the debugger):
    Code:
    qs = 0x0012e998 "1223939307----(null)---"
    It seems if I put that timestamp in an _snprintf, sprintf, or sprintf_s, the string which follows ends up (null) in the resulting string.

    Can anyone verify this? Have I lost the ability to use sprintf over the weekend? It really was totally not wild, although I was dealing with Vista at one point...

    Visual Studio 2008 on XP Professional
    Compilation command line:
    Code:
    /Od /I "..\openssl\include" /I "..\ShareFiles\C" 
    /I "C:\Program Files\Microsoft SDKs\Windows\v6.0A\\Include" 
    /D "WIN32" /D "_DEBUG" /D "_WINDOWS" /D "_USRDLL" /D "HELPER_EXPORTS" 
    /D "_CRT_SECURE_NO_WARNINGS" /D "_VC80_UPGRADE=0x0710" /D "_WINDLL" 
    /D "_MBCS" /Gm /EHsc /RTC1 /MTd /Fo"Debug\\" /Fd"Debug\vc90.pdb" 
    /W3 /c /ZI /TP .\utils.cpp
    Link command line:
    Code:
    /OUT:"..\BuildFiles/Helper.dll" /INCREMENTAL /DLL 
    /MANIFEST /MANIFESTFILE:"Debug\IHelper.dll.intermediate.manifest"
    /MANIFESTUAC:"level='asInvoker' uiAccess='false'" 
    /DEF:"Helper.def" /DEBUG /PDB:"..\BuildFiles/Helper.pdb" 
    /SUBSYSTEM:WINDOWS /DYNAMICBASE:NO 
    /IMPLIB:"..\BuildFiles/Helper.lib" 
    /MACHINE:X86 "C:\Program Files\Microsoft SDKs\Windows\v6.0A\\Lib\winhttp.lib" 
    
    ..\openssl\lib\libeay32.lib ..\openssl\lib\ssleay32.lib 
    kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib 
    advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib
    Thanks!

  2. #2
    and the Hat of Guessing tabstop's Avatar
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    Is sizeof(time_t)==sizeof(long)?

  3. #3
    a_capitalist_story
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    Nope, it's actually unsigned int (damn my Linux-based expectations), but sadly, changing the format specifier to %u did not change the behavior.

  4. #4
    C++まいる!Cをこわせ! Elysia's Avatar
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    sizeof(%lu) == 4 (sizeof(%u) is also 4)
    sizeof(time_t) == 8
    Can you spot the error?
    Last edited by Elysia; 10-13-2008 at 01:07 PM.
    Quote Originally Posted by Adak View Post
    io.h certainly IS included in some modern compilers. It is no longer part of the standard for C, but it is nevertheless, included in the very latest Pelles C versions.
    Quote Originally Posted by Salem View Post
    You mean it's included as a crutch to help ancient programmers limp along without them having to relearn too much.

    Outside of your DOS world, your header file is meaningless.

  5. #5
    a_capitalist_story
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    Dammit, what the hell was I thinking...in my haste I read the sizeof output incorrectly in the debugger...

    And hence, how I achieved my hat of Ass.

    Thanks, Elysia!

  6. #6
    C++まいる!Cをこわせ! Elysia's Avatar
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    No problem.
    Quote Originally Posted by Adak View Post
    io.h certainly IS included in some modern compilers. It is no longer part of the standard for C, but it is nevertheless, included in the very latest Pelles C versions.
    Quote Originally Posted by Salem View Post
    You mean it's included as a crutch to help ancient programmers limp along without them having to relearn too much.

    Outside of your DOS world, your header file is meaningless.

  7. #7
    Banned master5001's Avatar
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    "You made me look quite the fool, thanks Elysia!!!!"

    Man I hope that makes it to her sig.

  8. #8
    C++まいる!Cをこわせ! Elysia's Avatar
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    I don't want to add something insulting to the signature.
    Without proper permission and desire from the original poster. And of course, it could be removed at any time. But I don't think it's necessary.
    Quote Originally Posted by Adak View Post
    io.h certainly IS included in some modern compilers. It is no longer part of the standard for C, but it is nevertheless, included in the very latest Pelles C versions.
    Quote Originally Posted by Salem View Post
    You mean it's included as a crutch to help ancient programmers limp along without them having to relearn too much.

    Outside of your DOS world, your header file is meaningless.

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