[Bug 3949] New: wcwidth fails to be standards-compliant

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=3949

           Summary: wcwidth fails to be standards-compliant
           Product: uClibc
           Version: 0.9.32
          Platform: All
        OS/Version: Linux
            Status: NEW
          Severity: minor
          Priority: P5
         Component: Standard Compliance
        AssignedTo: unassigned at uclibc.org
        ReportedBy: kiyoshi.aman at gmail.com
                CC: uclibc-cvs at uclibc.org
   Estimated Hours: 0.0


The wcwidth function (and wcswidth, for that matter, since uClibc's wcwidth is
implemented in terms of wcswidth) fails to be standards compliant. The
following test should emit 'e-acute is 1 wide' on conforming implementations;
uClibc's instead emits 'e-acute is -1 wide':

#include <stdio.h>
#include <wchar.h>

void main(void) {
  printf("e-acute is %d wide\n", wcwidth(0xe9));
}

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