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On 2024-03-24T09:42:26+00:00 Thomas Dreibholz wrote:

There is a formatting bug for integers in printf() when using locale
settings and formatting with thousands separator.

Test program printfbug.c:
#include <stdio.h>
#include <stdlib.h>
#include <locale.h>

int main(int argc, char** argv)
{
   setlocale (LC_ALL, "");

   struct lconv* loc = localeconv();
   printf("Thousands Separator: <%s>\n", loc->thousands_sep);

   for(int i = 1; i <argc; i++) {
      int    n = atoi(argv[i]);
      double f = atof(argv[i]);
      printf("double <%'10.0f>\tint <%'10d>\n", f, n);
   }
   return 0;
}

Test run:
for l in en_US de_DE nb_NO nn_NO ; do
   echo "$l:" ; LC_ALL=$l.UTF-8 ./printfbug 1 10 100 1000 10000 100000 1000000 
10000000
done

Output:
en_US:
Thousands Separator: <,>
double <         1>     int <         1>
double <        10>     int <        10>
double <       100>     int <       100>
double <     1,000>     int <     1,000>
double <    10,000>     int <    10,000>
double <   100,000>     int <   100,000>
double < 1,000,000>     int < 1,000,000>
double <10,000,000>     int <10,000,000>
de_DE:
Thousands Separator: <.>
double <         1>     int <         1>
double <        10>     int <        10>
double <       100>     int <       100>
double <     1.000>     int <     1.000>
double <    10.000>     int <    10.000>
double <   100.000>     int <   100.000>
double < 1.000.000>     int < 1.000.000>
double <10.000.000>     int <10.000.000>
nb_NO:
Thousands Separator: < >
double <         1>     int <         1>
double <        10>     int <        10>
double <       100>     int <       100>
double <     1 000>     int <   1 000>
double <    10 000>     int <  10 000>
double <   100 000>     int < 100 000>
double < 1 000 000>     int <1 000 000>
double <10 000 000>     int <10 000 000>
nn_NO:
Thousands Separator: < >
double <         1>     int <         1>
double <        10>     int <        10>
double <       100>     int <       100>
double <     1 000>     int <   1 000>
double <    10 000>     int <  10 000>
double <   100 000>     int < 100 000>
double < 1 000 000>     int <1 000 000>
double <10 000 000>     int <10 000 000>

That is, en_US and de_DE are fine (they use ',' and '.' as thousands
separator). But nb_NO and nn_NO produce the wrong output when using
integers (%'10d). However, float is fine as well (%'10.0f).

For nb_NO and nn_NO, the separator is a 3-byte UTF-8 character 0xe2 0x80
0xaf, which is UTF-8 NARROW NO-BREAK SPACE ->
https://www.fileformat.info/info/unicode/char/202f/index.htm . It seems
that for integer formatting, the number of bytes is processed, instead
of counting the actual characters. For float formatting, the number of
characters is counted correctly.

That is:
$ LC_ALL=nb_NO.UTF-8 ./printfbug 1000 | hexdump -C
00000000  54 68 6f 75 73 61 6e 64  73 20 53 65 70 61 72 61  |Thousands Separa|
00000010  74 6f 72 3a 20 3c e2 80  af 3e 0a 64 6f 75 62 6c  |tor: <...>.doubl|
00000020  65 20 3c 20 20 20 20 20  31 e2 80 af 30 30 30 3e  |e <     1...000>|
00000030  09 69 6e 74 20 3c 20 20  20 31 e2 80 af 30 30 30  |.int <   1...000|
00000040  3e 0a                                             |>.|
00000042

I can reproduce the issue under Ubuntu 22.04, Ubuntu 24.04 (development
version), and Fedora 39.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/coreutils/+bug/2058775/comments/5


** Changed in: coreutils
       Status: Unknown => New

** Changed in: coreutils
   Importance: Unknown => Medium

-- 
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to coreutils in Ubuntu.
https://bugs.launchpad.net/bugs/2058775

Title:
  coreutils: printf formatting bug for nb_NO and nn_NO locales

Status in coreutils:
  New
Status in coreutils package in Ubuntu:
  New

Bug description:
  I just discovered a printf bug for at least the nb_NO and nn_NO
  locales when printing numbers with thousands separator. To reproduce:

  #!/bin/bash
  for l in de_DE en_US nb_NO ; do
     echo "LC_NUMERIC=$l.UTF-8"
     for n in 1 100 1000 10000 100000 1000000 10000000 ; do
        LC_NUMERIC=$l.UTF-8 /usr/bin/printf "<%'10d>\n" $n
     done
  done

  The expected output of "%'10d" is a right-formatted number string with
  10 characters.

  The output of the test script is fine for e.g. LC_NUMERIC=de_DE.UTF-8
  and LC_NUMERIC=en_US.UTF-8:

  LC_NUMERIC=de_DE.UTF-8
  <         1>
  <       100>
  <     1.000>
  <    10.000>
  <   100.000>
  < 1.000.000>
  <10.000.000>
  LC_NUMERIC=en_US.UTF-8
  <         1>
  <       100>
  <     1,000>
  <    10,000>
  <   100,000>
  < 1,000,000>
  <10,000,000>

  However, for LC_NUMERIC=nb_NO.UTF-8 and LC_NUMERIC=nn_NO.UTF-8, the
  formatting is wrong:

  LC_NUMERIC=nb_NO.UTF-8
  <         1>
  <       100>
  <   1 000>
  <  10 000>
  < 100 000>
  <1 000 000>
  <10 000 000>
  LC_NUMERIC=nn_NO.UTF-8
  <         1>
  <       100>
  <   1 000>
  <  10 000>
  < 100 000>
  <1 000 000>
  <10 000 000>

  I reproduced the issue with coreutils-8.32-4.1ubuntu1.1 (Ubuntu 22.04)
  as well as coreutils-9.3-5.fc39.x86_64 (Fedora 39).

  ProblemType: Bug
  DistroRelease: Ubuntu 22.04
  Package: coreutils 8.32-4.1ubuntu1.1
  ProcVersionSignature: Ubuntu 6.5.0-26.26~22.04.1-generic 6.5.13
  Uname: Linux 6.5.0-26-generic x86_64
  ApportVersion: 2.20.11-0ubuntu82.5
  Architecture: amd64
  CasperMD5CheckResult: pass
  CurrentDesktop: KDE
  Date: Fri Mar 22 21:33:13 2024
  InstallationDate: Installed on 2022-11-29 (479 days ago)
  InstallationMedia: Kubuntu 22.04.1 LTS "Jammy Jellyfish" - Release amd64 
(20220809.1)
  SourcePackage: coreutils
  UpgradeStatus: No upgrade log present (probably fresh install)

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