winsup/cygwin/cygmagic

   1 #!/bin/sh
   2 # cygmagic - Generate "magic numbers" from a structure.
   3 #
   4 #   Copyright 2001, 2002 Red Hat, Inc.
   5 #
   6 # This file is part of Cygwin.
   7 #
   8 # This software is a copyrighted work licensed under the terms of the
   9 # Cygwin license.  Please consult the file "CYGWIN_LICENSE" for
  10 # details.
  11
  12 file_magic=$1; shift
  13 gcc=$1; shift
  14 file=$1; shift
  15 trap "rm -f /tmp/$$.magic" 0 1 2 15
  16 cat <<EOF > $file_magic
  17 /* autogenerated - do not edit */
  18 #include "$file"
  19 EOF
  20 sumit() {
  21     cksum $*
  22 }
  23
  24 while [ -n "$1" ]; do
  25     define=$1; shift
  26     struct=$1; shift
  27     sum=`$gcc -E $file | sed -n "/^$struct/,/^};/p" | sed -e 's/[       ]//g' -e '/^$/d' | sumit | awk '{printf "0x%xU", $1}'`
  28     echo "#define $define $sum"
  29     curr=`sed -n "s/^#[         ]*define CURR_$define[  ][      ]*\([^  ][^     ]*\)/\1/p" $file`
  30     [ "$curr" != "$sum" ] && echo "*** WARNING WARNING WARNING WARNING WARNING ***
  31 *** $file: magic number for $define changed old $curr != new $sum
  32 *** WARNING WARNING WARNING WARNING WARNING ***" 1>&2
  33 done >> $file_magic
  34 exit 0