Script to expand macros and enums from C headers

cenum.sh

#!/bin/bash

CC=${CC:-gcc}

# check usage
if [[ $# -eq 0 ]]; then
    echo "usage: cenum [headers..] ENUM" >&2
    exit 1
fi

# generate temporary file
f=$(mktemp --suffix=.c)

# add headers
while [[ $# -gt 1 ]]; do
    echo '#include <'"$1"'>' >> "$f"
    shift
done

echo '#include <stdio.h>' >> "$f"
echo 'int main() { printf("%1$d (0x%1$lx)\n", '"$1"'); }' >> "$f"

# compile and execute
"$CC" $CFLAGS "$f" -o "$f.elf" && "$f.elf"

# remove temporary files
rm -f "$f" "$f.elf"

cmacro.sh

#!/bin/bash

CC=${CC:-gcc}

# check usage
if [[ $# -eq 0 ]]; then
    echo "usage: cmacro [headers..] MACRO" >&2
    exit 1
fi

# generate temporary file
f=$(mktemp --suffix=.c)

# add headers
while [[ $# -gt 1 ]]; do
    echo '#include <'"$1"'>' >> "$f"
    shift
done

# add marker
marker="================================================================================"
echo "$marker" >> "$f"

# add macro calls
echo "$1" >> "$f"

# expand macros and strip marker
"$CC" $CFLAGS -P -E "$f" | sed -n -e '/'"$marker"'/,$p' | tail -n+2

# remove temporary file
rm "$f"

usage.sh

$ cmacro sys/mman.h "PROT_READ RPOT_WRITE PROT_EXEC"
0x1 0x2 0x4
$ cmacro unistd.h STDIN_FILENO
0
$ cmacro stdio.h EOF
(-1)
$ cmacro elf.h Val_GNU_MIPS_ABI_FP_ANY
Val_GNU_MIPS_ABI_FP_ANY
$ cenum elf.h Val_GNU_MIPS_ABI_FP_ANY
0 (0x0)