44 lines
1.1 KiB
Bash
Executable file
44 lines
1.1 KiB
Bash
Executable file
#!/bin/bash
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# cygmagic - Generate "magic numbers" from a structure.
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#
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# This file is part of Cygwin.
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#
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# This software is a copyrighted work licensed under the terms of the
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# Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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# details.
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set -e
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shopt -s -o pipefail
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shopt -s inherit_errexit
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file_magic=$1; shift
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gcc=$1; shift
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file=$1; shift
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tmpfile=/tmp/$$.magic
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trap "rm -f /tmp/$$.magic" 0 1 2 15
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cat <<EOF > $tmpfile
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/* autogenerated - do not edit */
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#include "$file"
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EOF
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sumit() {
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cksum $*
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}
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while [ -n "$1" ]; do
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define=$1; shift
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struct=$1; shift
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sum=`$gcc -D__CYGMAGIC__ -E -P $file | sed -n "/^$struct/,/^};/p" | sed -e 's/[ ]//g' -e '/^$/d' | sumit | awk '{printf "0x%xU", $1}'`
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echo "#define $define $sum"
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curr=`sed -n "s/^#[ ]*define CURR_$define[ ][ ]*\([^ ][^ ]*\)/\1/p" $file`
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[ "$curr" != "$sum" ] && echo "*** WARNING WARNING WARNING WARNING WARNING ***
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*** $file: magic number for $define changed old $curr != new $sum
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*** WARNING WARNING WARNING WARNING WARNING ***" 1>&2
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done >> $tmpfile
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mv $tmpfile $file_magic
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exit 0
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