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#! /bin/sh
# mkh - pull headers out of C source
PATH=/bin:/usr/bin ; export PATH
# egrep pattern to pick out marked lines
egrep='^ =([ ]|$)'
# Sed program to process marked lines into lines for the header file.
# The markers have already been removed. Two things are done here: removal
# of backslashed newlines, and some fudging of comments. The first is done
# because -o needs to have prototypes on one line to strip them down.
# Getting comments into the output is tricky; we turn C++-style // comments
# into /* */ comments, after altering any existing */'s to avoid trouble.
peel=' /\\$/N
/\\\n[ ]*/s///g
/\/\//s;\*/;* /;g
/\/\//s;//\(.*\);/*\1 */;'
for a
do
case "$a" in
-o) # old (pre-function-prototype) compiler
# add code to comment out argument lists
peel="$peel
"'/^\([^#\/][^\/]*[a-zA-Z0-9_)]\)(\(.*\))/s;;\1(/*\2*/);'
shift
;;
-b) # funny Berkeley __P macro
peel="$peel
"'/^\([^#\/][^\/]*[a-zA-Z0-9_)]\)(\(.*\))/s;;\1 __P((\2));'
shift
;;
-s) # compiler doesn't like `static foo();'
# add code to get rid of the `static'
peel="$peel
"'/^static[ ][^\/]*[a-zA-Z0-9_)](.*)/s;static.;;'
shift
;;
-p) # private declarations
egrep='^ ==([ ]|$)'
shift
;;
-i) # wrap in #ifndef, argument is name
ifndef="$2"
shift ; shift
;;
*) break
;;
esac
done
if test " $ifndef" != " "
then
echo "#ifndef $ifndef"
echo "#define $ifndef /* never again */"
fi
echo "/* ========= begin header generated by $0 ========= */"
echo '#ifdef __cplusplus'
echo 'extern "C" {'
echo '#endif'
for f
do
echo
echo "/* === $f === */"
egrep "$egrep" $f | sed 's/^ ==*[ ]//;s/^ ==*$//' | sed "$peel"
echo
done
echo '#ifdef __cplusplus'
echo '}'
echo '#endif'
echo "/* ========= end header generated by $0 ========= */"
if test " $ifndef" != " "
then
echo "#endif"
fi
exit 0
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