[Mingw-notify] [ mingw-Bugs-1961893 ] Bug in __mingw_snprintf with "%9.0e" format

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Bugs item #1961893, was opened at 2008-05-11 15:21
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Category: mingw runtime
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: François-Xavier Coudert (coudert)
Assigned to: Nobody/Anonymous (nobody)
Summary: Bug in __mingw_snprintf with "%9.0e" format

Initial Comment:
Take the following testcase:

#include <stdio.h>
extern int __mingw_snprintf (char *, size_t, const char *, ...);

int main (void) {
  char buf[21];
  __mingw_snprintf (buf, 20, "%9.0e\n", 39.);
  fputs (buf, stdout);
  snprintf (buf, 20, "%9.0e\n", 39.);
  fputs (buf, stdout);
  return 0;
}

Compiled and run, it gives:

$ gcc u.c -W -Wall && a
    3e+01
   4e+001

where you can see that __mingw_snprintf() got its rounding wrong (it's the first line of output).

(As an side comment, the Windows snprintf() seems to output more exponent digits than the ones I know in the Unix world, but of course that's a their problem, not mingw's.)


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You can respond by visiting: 
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