cmd/oawk/parse.c

	parse.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*  Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/*    All Rights Reserved   */


#ident  "%Z%%M% %I% %E% SMI"

#include "awk.def"
#include "awk.h"
#include "stdio.h"

NODE *nodealloc(n)
{
    register NODE *x;
    x = (NODE *) malloc(sizeof (NODE) + (n-1)*sizeof (NODE *));
    if (x == NULL)
        error(FATAL, "out of space in nodealloc");
    return (x);
}


NODE *exptostat(a) NODE *a;
{
    a->ntype = NSTAT;
    return (a);
}


NODE *node0(a)
{
    register NODE *x;
    x = nodealloc(0);
    x->nnext = NULL;
    x->nobj = a;
    return (x);
}


NODE *node1(a, b) NODE *b;
{
    register NODE *x;
    x = nodealloc(1);
    x->nnext = NULL;
    x->nobj = a;
    x->narg[0]=b;
    return (x);
}


NODE *node2(a, b, c) NODE *b, *c;
{
    register NODE *x;
    x = nodealloc(2);
    x->nnext = NULL;
    x->nobj = a;
    x->narg[0] = b;
    x->narg[1] = c;
    return (x);
}


NODE *node3(a, b, c, d) NODE *b, *c, *d;
{
    register NODE *x;
    x = nodealloc(3);
    x->nnext = NULL;
    x->nobj = a;
    x->narg[0] = b;
    x->narg[1] = c;
    x->narg[2] = d;
    return (x);
}


NODE *node4(a, b, c, d, e) NODE *b, *c, *d, *e;
{
    register NODE *x;
    x = nodealloc(4);
    x->nnext = NULL;
    x->nobj = a;
    x->narg[0] = b;
    x->narg[1] = c;
    x->narg[2] = d;
    x->narg[3] = e;
    return (x);
}


NODE *stat3(a, b, c, d) NODE *b, *c, *d;
{
    register NODE *x;
    x = node3(a, b, c, d);
    x->ntype = NSTAT;
    return (x);
}


NODE *op2(a, b, c) NODE *b, *c;
{
    register NODE *x;
    x = node2(a, b, c);
    x->ntype = NEXPR;
    return (x);
}


NODE *op1(a, b) NODE *b;
{
    register NODE *x;
    x = node1(a, b);
    x->ntype = NEXPR;
    return (x);
}


NODE *stat1(a, b) NODE *b;
{
    register NODE *x;
    x = node1(a, b);
    x->ntype = NSTAT;
    return (x);
}


NODE *op3(a, b, c, d) NODE *b, *c, *d;
{
    register NODE *x;
    x = node3(a, b, c, d);
    x->ntype = NEXPR;
    return (x);
}


NODE *stat2(a, b, c) NODE *b, *c;
{
    register NODE *x;
    x = node2(a, b, c);
    x->ntype = NSTAT;
    return (x);
}


NODE *stat4(a, b, c, d, e) NODE *b, *c, *d, *e;
{
    register NODE *x;
    x = node4(a, b, c, d, e);
    x->ntype = NSTAT;
    return (x);
}


NODE *valtonode(a, b) CELL *a;
{
    register NODE *x;
    x = node0(a);
    x->ntype = NVALUE;
    x->subtype = b;
    return (x);
}


NODE *pa2stat(a, b, c) NODE *a, *b, *c;
{
    register NODE *x;
    x = node4(PASTAT2, a, b, c, (NODE *) paircnt);
    paircnt++;
    x->ntype = NSTAT;
    return (x);
}


NODE *linkum(a, b) NODE *a, *b;
{
    register NODE *c;
    if (a == NULL) return (b);
    else if (b == NULL) return (a);
    for (c = a; c->nnext != NULL; c=c->nnext)
        ;
    c->nnext = b;
    return (a);
}


NODE *genprint()
{
    register NODE *x;
    static wchar_t L_record[] = L"$record";
    x = stat2(PRINT, valtonode(lookup(L_record, symtab, 0), CFLD), NULL);
    return (x);
}