winsup/cygwin/cygmagic

   1 #!/bin/bash
   2 # cygmagic - Generate "magic numbers" from a structure.
   3 #
   4 # This file is part of Cygwin.
   5 #
   6 # This software is a copyrighted work licensed under the terms of the
   7 # Cygwin license.  Please consult the file "CYGWIN_LICENSE" for
   8 # details.
   9
  10 set -e
  11 shopt -s -o pipefail
  12 shopt -s inherit_errexit
  13
  14 file_magic=$1; shift
  15 gcc=$1; shift
  16 file=$1; shift
  17
  18 tmpfile=/tmp/$$.magic
  19 trap "rm -f /tmp/$$.magic" 0 1 2 15
  20
  21 cat <<EOF > $tmpfile
  22 /* autogenerated - do not edit */
  23 #include "$file"
  24 EOF
  25
  26 sumit() {
  27     cksum $*
  28 }
  29
  30 while [ -n "$1" ]; do
  31     define=$1; shift
  32     struct=$1; shift
  33     sum=`$gcc -D__CYGMAGIC__ -E -P $file | sed -n "/^$struct/,/^};/p" | sed -e 's/[     ]//g' -e '/^$/d' | sumit | awk '{printf "0x%xU", $1}'`
  34     echo "#define $define $sum"
  35     curr=`sed -n "s/^#[         ]*define CURR_$define[  ][      ]*\([^  ][^     ]*\)/\1/p" $file`
  36     [ "$curr" != "$sum" ] && echo "*** WARNING WARNING WARNING WARNING WARNING ***
  37 *** $file: magic number for $define changed old $curr != new $sum
  38 *** WARNING WARNING WARNING WARNING WARNING ***" 1>&2
  39 done >> $tmpfile
  40
  41 mv $tmpfile $file_magic
  42
  43 exit 0