tests/sort/sort-discrim.sh

   1 #!/bin/sh
   2 # Test discriminator-based sorting.
   3
   4 # Copyright (C) 2012-2024 Free Software Foundation, Inc.
   5
   6 # This program is free software: you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation, either version 3 of the License, or
   9 # (at your option) any later version.
  10
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
  18
  19 . "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
  20 print_ver_ sort
  21
  22 # Set limit variables.
  23 getlimits_
  24
  25 # These tests are designed for a 'sort' implementation that uses a
  26 # discriminator, i.e., a brief summary of a key that may have lost info,
  27 # but whose ordering is consistent with that of the original key.
  28 # The tests are useful even if 'sort' does not use this representation.
  29
  30 # Test lexicographic sorting.
  31
  32 # A long-enough string so that it overruns a small discriminator buffer size.
  33 long_prefix='aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa'
  34 seq -f "$long_prefix%5.0f" 10000 > exp || fail=1
  35 sort -R exp | LC_ALL=C sort > out || fail=1
  36 compare exp out || fail=1
  37
  38
  39 # Test numeric sorting.
  40
  41 # These tests are designed for an internal representation that ordinarily
  42 # looks at the number plus two decimal digits, but if -h is
  43 # used it looks at one decimal place plus a 4-bit SI prefix value.
  44 # In both cases, there's an extra factor of 2 for the sign.
  45 max_int200=$(expr $UINTMAX_MAX / 200) &&
  46 max_frac200=$(printf '%.2d' $(expr $UINTMAX_MAX / 2 % 100)) &&
  47 max_int320=$(expr $UINTMAX_MAX / 320) &&
  48 max_frac320=$(expr $UINTMAX_MAX / 32 % 10) &&
  49 { printf -- "\
  50     -$UINTMAX_OFLOW
  51     -$UINTMAX_MAX
  52     -${max_int200}0.1
  53     -${max_int200}0
  54     -${max_int200}0.0
  55     -${max_int320}0.1
  56     -${max_int320}0
  57     -${max_int320}0.0
  58     -$max_int200.${max_frac200}1
  59     -$max_int200.$max_frac200
  60     -$max_int320.${max_frac320}1
  61     -$max_int320.$max_frac320
  62 " &&
  63   seq -- -10 .001 10 &&
  64   printf "\
  65     $max_int320
  66     $max_int320.$max_frac320
  67     $max_int320.${max_frac320}1
  68     $max_int200
  69     $max_int200.$max_frac200
  70     $max_int200.${max_frac200}1
  71     ${max_int320}0
  72     ${max_int320}0.0
  73     ${max_int320}0.1
  74     ${max_int200}0
  75     ${max_int200}0.0
  76     ${max_int200}0.1
  77     $UINTMAX_MAX
  78     $UINTMAX_OFLOW
  79 "
  80 } > exp || fail=1
  81
  82 for opts in -n -h; do
  83   sort -R exp | LC_ALL=C sort $opts > out || fail=1
  84   compare exp out || fail=1
  85 done
  86
  87 Exit $fail