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3f220dd51a
* It now knows about the existence of #elif which would have
caused it to produce incorrect results in some situations.
* It can now process #if and #elif lines according to the
values of symbols that are specified on the command line.
The expression parser is only a simple subset of what C
allows but it should be sufficient for most real-world
code (it can cope with everything it finds in xterm).
* It has an option for printing all of the symbols that might
control #if processing. The unifdefall script uses this
option along with cpp -dM to strip all #ifs from a file.
* It has much larger static limits.
* It handles nested #ifs much more completely.
There have also been many style improvements: KNF; ANSI function
definitions; all global stuff moved to the top of the file; use
stdbool instead of h0h0bool; const-correctness; err(3) instead
of fprintf(stderr, ...); enum instead of #define; commentary.
I used NetBSD's unifdef as the basis of this since it has received
the most attention over the years.
PR: 37454
Reviewed by: markm, dwmalone
Approved by: dwmalone (mentor)
MFC after: 3 weeks
30 lines
793 B
Bash
30 lines
793 B
Bash
#!/bin/sh
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#
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# remove all the #if's from a source file
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#
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# $dotat: things/unifdefall.sh,v 1.8 2002/05/15 10:31:20 fanf Exp $
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# $FreeBSD$
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set -e
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basename=`basename $0`
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tmp=`mktemp -d -t $basename` || exit 2
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unifdef -s "$@" | sort | uniq > $tmp/ctrl
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cpp -dM "$@" | sort |
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sed -Ee 's/^#define[ ]+(.*[^ ])[ ]*$/\1/' > $tmp/hashdefs
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sed -Ee 's/^([A-Za-z0-9_]+).*$/\1/' $tmp/hashdefs > $tmp/alldef
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comm -23 $tmp/ctrl $tmp/alldef > $tmp/undef
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comm -12 $tmp/ctrl $tmp/alldef > $tmp/def
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echo unifdef \\ > $tmp/cmd
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sed -Ee 's/^(.*)$/-U\1 \\/' $tmp/undef >> $tmp/cmd
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while read sym
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do sed -Ee '/^('"$sym"')([(][^)]*[)])?([ ]+(.*))?$/!d;s//-D\1=\4/' $tmp/hashdefs
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done < $tmp/def |
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sed -Ee 's/\\/\\\\/g;s/"/\\"/g;s/^/"/;s/$/" \\/' >> $tmp/cmd
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echo '"$@"' >> $tmp/cmd
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sh $tmp/cmd "$@"
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rm -r $tmp
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