source: vendor/NetBSD-ash/current/mknodes.sh

#! /bin/sh
#       $NetBSD: mknodes.sh,v 1.1 2004/01/16 23:24:38 dsl Exp $

# Copyright (c) 2003 The NetBSD Foundation, Inc.
# All rights reserved.
#
# This code is derived from software contributed to The NetBSD Foundation
# by David Laight.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
# 3. Neither the name of The NetBSD Foundation nor the names of its
#    contributors may be used to endorse or promote products derived
#    from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
# ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.

nodetypes=$1
nodes_pat=$2
objdir="$3"

exec <$nodetypes
exec >$objdir/nodes.h.tmp

echo "/*"
echo " * This file was generated by mknodes.sh"
echo " */"
echo

tagno=0
while IFS=; read -r line; do
        line="${line%%#*}"
        IFS='   '
        set -- $line
        IFS=
        [ -z "$2" ] && continue
        case "$line" in
        ["      "]* )
                IFS=' '
                [ $field = 0 ] && struct_list="$struct_list $struct"
                eval field_${struct}_$field=\"\$*\"
                eval numfld_$struct=\$field
                field=$(($field + 1))
                ;;
        * )
                define=$1
                struct=$2
                echo "#define $define $tagno"
                tagno=$(($tagno + 1))
                eval define_$struct=\"\$define_$struct \$define\"
                struct_define="$struct_define $struct"
                field=0
                ;;
        esac
done

echo

IFS=' '
for struct in $struct_list; do
        echo
        echo
        echo "struct $struct {"
        field=0
        while
                eval line=\"\$field_${struct}_$field\"
                field=$(($field + 1))
                [ -n "$line" ]
        do
                IFS=' '
                set -- $line
                name=$1
                case $2 in
                nodeptr ) type="union node *";;
                nodelist ) type="struct nodelist *";;
                string ) type="char *";;
                int ) type="int ";;
                * ) name=; shift 2; type="$*";;
                esac
                echo "      $type$name;"
        done
        echo "};"
done

echo
echo
echo "union node {"
echo "      int type;"
for struct in $struct_list; do
        echo "      struct $struct $struct;"
done
echo "};"
echo
echo
echo "struct nodelist {"
echo "  struct nodelist *next;"
echo "  union node *n;"
echo "};"
echo
echo
echo "union node *copyfunc(union node *);"
echo "void freefunc(union node *);"

mv $objdir/nodes.h.tmp $objdir/nodes.h || exit 1

exec <$nodes_pat
exec >$objdir/nodes.c.tmp

echo "/*"
echo " * This file was generated by mknodes.sh"
echo " */"
echo

while IFS=; read -r line; do
        IFS='   '
        set -- $line
        IFS=
        case "$1" in
        '%SIZES' )
                echo "static const short nodesize[$tagno] = {"
                IFS=' '
                for struct in $struct_define; do
                        echo "      SHELL_ALIGN(sizeof (struct $struct)),"
                done
                echo "};"
                ;;
        '%CALCSIZE' )
                echo "      if (n == NULL)"
                echo "      return;"
                echo "      funcblocksize += nodesize[n->type];"
                echo "      switch (n->type) {"
                IFS=' '
                for struct in $struct_list; do
                        eval defines=\"\$define_$struct\"
                        for define in $defines; do
                                echo "      case $define:"
                        done
                        eval field=\$numfld_$struct
                        while
                                [ $field != 0 ]
                        do
                                eval line=\"\$field_${struct}_$field\"
                                field=$(($field - 1))
                                IFS=' '
                                set -- $line
                                name=$1
                                cl=")"
                                case $2 in
                                nodeptr ) fn=calcsize;;
                                nodelist ) fn=sizenodelist;;
                                string ) fn="funcstringsize += strlen"
                                        cl=") + 1";;
                                * ) continue;;
                                esac
                                echo "      ${fn}(n->$struct.$name${cl};"
                        done
                        echo "      break;"
                done
                echo "      };"
                ;;
        '%COPY' )
                echo "      if (n == NULL)"
                echo "      return NULL;"
                echo "      new = funcblock;"
                echo "      funcblock = (char *) funcblock + nodesize[n->type];"
                echo "      switch (n->type) {"
                IFS=' '
                for struct in $struct_list; do
                        eval defines=\"\$define_$struct\"
                        for define in $defines; do
                                echo "      case $define:"
                        done
                        eval field=\$numfld_$struct
                        while
                                [ $field != 0 ]
                        do
                                eval line=\"\$field_${struct}_$field\"
                                field=$(($field - 1))
                                IFS=' '
                                set -- $line
                                name=$1
                                case $2 in
                                nodeptr ) fn="copynode(";;
                                nodelist ) fn="copynodelist(";;
                                string ) fn="nodesavestr(";;
                                int ) fn=;;
                                * ) continue;;
                                esac
                                f="$struct.$name"
                                echo "      new->$f = ${fn}n->$f${fn:+)};"
                        done
                        echo "      break;"
                done
                echo "      };"
                echo "      new->type = n->type;"
                ;;
        * ) echo "$line";;
        esac
done

mv $objdir/nodes.c.tmp $objdir/nodes.c || exit 1