#!/bin/sh

INFILE=$1

if [ "X${INFILE}" = "X" ]
then
	echo "Usage: $0 abispec"
	exit 1
fi

if [ ! -f "${INFILE}" ]
then
	echo "$0: ${INFILE}: not found"
	exit 1
fi

ABI=abi.c
HEADER=abi.lh


# This is pretty evil. We use sed to produce shell commands which set
# variables which contain 8-character chunks of the sha1 hash.
# eval takes care of defining them in the current shell, rather than in
# a subshell.
for VER in `sha1 -n ${INFILE} | sed 's/\(........\)\(........\)\(........\)\(........\)\(........\).*$/ABIVER1=\1 ABIVER2=\2 ABIVER3=\3 ABIVER4=\4 ABIVER5=\5/'`
do
	eval ${VER}
done


FNCOUNT=0

do_function()
{
	echo "	vm_intfn_${ARG1}," >>${ABI}
	echo "fndefint ${ARG1} ${FNCOUNT};" >>${HEADER}
	FNCOUNT=$((${FNCOUNT}+1))
}

do_function_v()
{
	echo "	vm_intfn_${ARG1}," >>${ABI}
	echo "fndefint_v ${ARG1} ${FNCOUNT};" >>${HEADER}
	FNCOUNT=$((${FNCOUNT}+1))
}

cat <<EOF >${ABI}
/* abi.c */
/* autogenerated - do not edit */

#include "abi.h"

const long vm_abiversion1 = 0x${ABIVER1};
const long vm_abiversion2 = 0x${ABIVER2};
const long vm_abiversion3 = 0x${ABIVER3};
const long vm_abiversion4 = 0x${ABIVER4};
const long vm_abiversion5 = 0x${ABIVER5};

vm_intfn vm_intfn_table[] = {
EOF

cat <<EOF >${HEADER}
/* abi.lh */
/* autogenerated - do not edit */

constant __abiversion1 0x${ABIVER1};
constant __abiversion2 0x${ABIVER2};
constant __abiversion3 0x${ABIVER3};
constant __abiversion4 0x${ABIVER4};
constant __abiversion5 0x${ABIVER5};

EOF

while read TYPE ARG1 ARG2
do
	case "$TYPE" in
		function) do_function
			;;
		function_v) do_function_v
			;;
	esac
done <${INFILE}

cat <<EOF >>${ABI}
};

const int vm_intfn_size = sizeof(vm_intfn_table) / sizeof(vm_intfn);
EOF