This is the mail archive of the cygwin mailing list for the Cygwin project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Cygwin 1.7.1 sprintf() with format string having 8th bit set


Hello,

In Cygwin 1,7.1, sprintf() with the format string having an 8th bit set
appears to be broken. Sample code (where I've indicated the backslashes in
the comments, in case they are stripped out by the mailer):

#include <stdio.h>

int main (void)
{
    unsigned char foo[30] = "";
    unsigned char bar[30] = "";
    unsigned char xxx[30] = "";
    sprintf (foo, "\100%s", "ABCD"); /* this is backslash one zero zero   */
    sprintf (bar, "\300%s", "ABCD"); /* this is backslash three zero zero */
    sprintf (xxx, "\300ABCD");       /* this is backslash three zero zero */
    printf ("%d %d %d %d %d\n", foo[0],foo[1],foo[2],foo[3],foo[4]);
    printf ("%d %d %d %d %d\n", bar[0],bar[1],bar[2],bar[3],bar[4]);
    printf ("%d %d %d %d %d\n", xxx[0],xxx[1],xxx[2],xxx[3],xxx[4]);
    return 0;
}

gives:

64 65 66 67 68
0 0 0 0 0
192 65 66 67 68

The second line of the output should be the same as the third.

This problem is likely to affect programs using xterm as a pseudo-terminal.
The number octal 300 (decimal 192) isn't significant here.

Regards, Joe Quinsey



--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]