[Mingw-notify] [ mingw-Bugs-661165 ] printf function does not support long long

[<no...@so...>]

Bugs item #661165, was opened at 2003-01-02 09:34
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https://sourceforge.net/tracker/?func=detail&atid=102435&aid=661165&group_id=2435

Category: gcc
Group: 64 bit feature request
Status: Open
Resolution: None
Priority: 5
Submitted By: Matt Ball (ballm)
Assigned to: Danny Smith (dannysmith)
Summary: printf function does not support long long

Initial Comment:
The printf function does not correctly handle long 
long input parameters in the MinGW environment 
(and possible other environments).  The printf 
function appears to attempt to handle the long 
long input.  However, it only pulls off one 32-bit 
parameter, and does not process the second 32-bit 
parameter for the long long.  The next format 
descriptor will typically use the upper 32-bits of 
the previous long long parameter.

Here is code that could repeat this problem:

long long A = 12345678901234LL, B = 
98765432109876LL;
printf("%lld, %lld\n", A, B);

GCC release: gcc (GCC) 3.2 (mingw special 
20020817-1) 

Mingw release: MinGW 2.0.0-3 running under 
Windows NT



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>Comment By: Matt Ball (ballm)
Date: 2003-01-02 15:05

Message:
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Thanks for the info!
The I64 approach will work for what I'm doing.
However, there is still a descrepancy between gcc and 
libc.  gcc does not appear to recognize the "I64" format 
specifier, and will issue a warning whenever C code 
includes it.  The printf function in libc does not 
recognize the "ll" format prefix.  However, gcc will not 
issue any warning if the C program uses "ll".  In a future 
release we may want to resolve the differences in 
warnings issued by gcc, and what is implement for 
printf in libc.  "ll" may be an ANSI C99 standard, so it 
might be worth implementing at some point.

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Comment By: Danny Smith (dannysmith)
Date: 2003-01-02 12:53

Message:
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 MSVC printf does not recognize "ll" identifier, use "I64" 
instead.
printf("%I64d, %I64d\n", A, B); 

Danny

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You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=102435&aid=661165&group_id=2435