150 lines
2.6 KiB
C
Executable file
150 lines
2.6 KiB
C
Executable file
/*
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* a small awk clone
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*
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* (C) 1989 Saeko Hirabauashi & Kouichi Hirabayashi
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*
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* Absolutely no warranty. Use this software with your own risk.
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*
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* Permission to use, copy, modify and distribute this software for any
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* purpose and without fee is hereby granted, provided that the above
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* copyright and disclaimer notice.
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*
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* This program was written to fit into 64K+64K memory of the Minix 1.2.
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*/
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#include <stdio.h>
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#include "awk.h"
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NODE *
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node0(type)
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{
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NODE *p;
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char *emalloc();
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p = (NODE *) emalloc(sizeof(*p) - sizeof(p));
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p->n_type = type;
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p->n_next = NULL;
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return p;
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}
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NODE *
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node1(type, arg0) NODE *arg0;
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{
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NODE *p;
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char *emalloc();
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p = (NODE *) emalloc(sizeof(*p));
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p->n_type = type;
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p->n_next = NULL;
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p->n_arg[0] = (NODE *) arg0;
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return p;
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}
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NODE *
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node2(type, arg0, arg1) NODE *arg0, *arg1;
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{
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NODE *p;
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char *emalloc();
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p = (NODE *) emalloc(sizeof(*p) + sizeof(p) * 1);
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p->n_type = type;
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p->n_next = NULL;
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p->n_arg[0] = (NODE *) arg0;
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p->n_arg[1] = (NODE *) arg1;
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return p;
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}
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NODE *
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node3(type, arg0, arg1, arg2) NODE *arg0, *arg1, *arg2;
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{
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NODE *p;
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char *emalloc();
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p = (NODE *) emalloc(sizeof(*p) + sizeof(p) * 2);
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p->n_type = type;
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p->n_next = NULL;
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p->n_arg[0] = (NODE *) arg0;
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p->n_arg[1] = (NODE *) arg1;
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p->n_arg[2] = (NODE *) arg2;
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return p;
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}
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NODE *
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node4(type, arg0, arg1, arg2, arg3) NODE *arg0, *arg1, *arg2, *arg3;
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{
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NODE *p;
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char *emalloc();
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p = (NODE *) emalloc(sizeof(*p) + sizeof(p) * 3);
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p->n_type = type;
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p->n_next = NULL;
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p->n_arg[0] = (NODE *) arg0;
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p->n_arg[1] = (NODE *) arg1;
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p->n_arg[2] = (NODE *) arg2;
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p->n_arg[3] = (NODE *) arg3;
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return p;
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}
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CELL *
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mkcell(type, sval, fval) char *sval; double fval;
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{
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CELL *p;
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char *emalloc(), *strsave();
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p = (CELL *) emalloc(sizeof(*p));
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p->c_type = type;
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if (sval == NULL)
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p->c_sval = NULL;
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else
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p->c_sval = strsave(sval);
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p->c_fval = fval;
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return p;
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}
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#ifdef TMPCELL
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#define MAXTMP 25
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CELL tmpcell[MAXTMP];
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#endif
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CELL *
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mktmp(type, sval, fval) char *sval; double fval;
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{
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register int i;
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char *strsave();
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#ifdef TMPCELL
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for (i = 0; i < MAXTMP; i++)
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if (tmpcell[i].c_type == 0) {
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tmpcell[i].c_type = type | TMP;
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tmpcell[i].c_sval = strsave(sval);
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tmpcell[i].c_fval = fval;
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return &tmpcell[i];
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}
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error("formula too complex", (char *) 0);
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#else
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return mkcell(type | TMP, sval, fval);
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#endif
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}
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c_free(p) CELL *p;
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{
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if ((p != NULL) && (p->c_type & TMP)) {
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#ifdef TMPCELL
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p->c_type = 0;
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sfree(p->c_sval);
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p->c_sval = (char *)NULL;
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p->c_fval = 0.0;
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#else
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if (p->c_sval != NULL) {
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Free(p->c_sval);
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p->c_sval = NULL;
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}
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p->c_type = 0;
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Free(p);
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p = NULL;
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#endif
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}
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}
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