tests/mixed

   1 #!/bin/sh
   2 # Ensure that gzip -cdf handles mixed compressed/not-compressed data
   3 # Before gzip-1.5, it would produce invalid output.
   4
   5 # Copyright (C) 2010-2024 Free Software Foundation, Inc.
   6
   7 # This program is free software: you can redistribute it and/or modify
   8 # it under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation, either version 3 of the License, or
  10 # (at your option) any later version.
  11
  12 # This program is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 # GNU General Public License for more details.
  16
  17 # You should have received a copy of the GNU General Public License
  18 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19 # limit so don't run it by default.
  20
  21 . "${srcdir=.}/init.sh"; path_prepend_ ..
  22
  23 printf 'xxx\nyyy\n'      > exp2 || framework_failure_
  24 printf 'aaa\nbbb\nccc\n' > exp3 || framework_failure_
  25
  26 fail=0
  27
  28 (echo xxx; echo yyy) > in || fail=1
  29 gzip -cdf < in > out || fail=1
  30 compare exp2 out || fail=1
  31
  32 # Uncompressed input, followed by compressed data.
  33 # Currently fails, so skip it.
  34 # (echo xxx; echo yyy|gzip) > in || fail=1
  35 # gzip -cdf < in > out || fail=1
  36 # compare exp2 out || fail=1
  37
  38 # Compressed input, followed by regular (not-compressed) data.
  39 (echo xxx|gzip; echo yyy) > in || fail=1
  40 gzip -cdf < in > out || fail=1
  41 compare exp2 out || fail=1
  42
  43 (echo xxx|gzip; echo yyy|gzip) > in || fail=1
  44 gzip -cdf < in > out || fail=1
  45 compare exp2 out || fail=1
  46
  47 in_str=0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_-+=%
  48 for i in 0 1 2 3 4 5 6 7 8 9 a; do in_str="$in_str$in_str" ;done
  49
  50 # Start with some small sizes.  $(seq 64)
  51 sizes=$(i=0; while :; do echo $i; test $i = 64 && break; i=$(expr $i + 1); done)
  52
  53 # gzip's internal buffer size is 32KiB + 64 bytes:
  54 sizes="$sizes 32831 32832 32833"
  55
  56 # 128KiB, +/- 1
  57 sizes="$sizes 131071 131072 131073"
  58
  59 # Ensure that "gzip -cdf" acts like cat, for a range of small input files.
  60 i=0
  61 for i in $sizes; do
  62   echo $i
  63   printf %$i.${i}s $in_str > in
  64   gzip -cdf < in > out
  65   compare in out || fail=1
  66 done
  67
  68 Exit $fail