908 lines
16 KiB
C
908 lines
16 KiB
C
/* Copyright (c) 1984 AT&T */
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/* All Rights Reserved */
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/* THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T */
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/* The copyright notice above does not evidence any */
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/* actual or intended publication of such source code. */
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/* #ident "@(#)awk:run.c 1.5" */
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#ident "$Revision: 1.8 $"
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#define DEBUG
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#define tempfree(a) {if(a && istemp(a)) {xfree(a->sval) ;a->tval = 0;}}
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#include "awk.def"
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#include "math.h"
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#include "awk.h"
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#include "stdio.h"
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#define RECSIZE (6 * 512)
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#define FILENUM 10
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struct
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{
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FILE *fp;
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char *fname;
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} files[FILENUM];
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extern CELL *execute(), *nodetoobj(), *fieldel(), *dopa2(), *gettemp();
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#define PA2NUM 29
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int pairstack[PA2NUM], paircnt;
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NODE *winner = NULL;
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#define MAXTMP 20
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CELL tmps[MAXTMP];
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static CELL truecell ={ OBOOL, BTRUE, 0, 0, 0.0, NUM, 0 };
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CELL *true = &truecell;
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static CELL falsecell ={ OBOOL, BFALSE, 0, 0, 0.0, NUM, 0 };
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CELL *false = &falsecell;
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static CELL breakcell ={ OJUMP, JBREAK, 0, 0, 0.0, NUM, 0 };
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CELL *jbreak = &breakcell;
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static CELL contcell ={ OJUMP, JCONT, 0, 0, 0.0, NUM, 0 };
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CELL *jcont = &contcell;
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static CELL nextcell ={ OJUMP, JNEXT, 0, 0, 0.0, NUM, 0 };
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CELL *jnext = &nextcell;
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static CELL exitcell ={ OJUMP, JEXIT, 0, 0, 0.0, NUM, 0 };
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CELL *jexit = &exitcell;
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static CELL tempcell ={ OCELL, CTEMP, 0, 0, 0.0, NUM, 0 };
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run(a) NODE *a;
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{
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execute(a);
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}
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CELL *execute(u) NODE *u;
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{
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register CELL *(*proc)();
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register CELL *x;
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register NODE *a;
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extern char *printname[];
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if (u == NULL)
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return(true);
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for (a = u; ; a = a->nnext) {
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if (cantexec(a))
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return(nodetoobj(a));
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if (notlegal(a->nobj))
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error(FATAL, "illegal statement %o", a);
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proc = proctab[a->nobj-FIRSTTOKEN];
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x = (*proc)(a->narg, a->nobj);
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if (isfld(x))
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fldbld();
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if (isexpr(a))
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return(x);
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/* a statement, goto next statement */
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if (isjump(x))
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return(x);
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if (a->nnext == (NODE *)NULL)
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return(x);
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tempfree(x);
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}
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}
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CELL *program(a, n) register NODE **a;
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{
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register CELL *x;
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if (a[0] != NULL) {
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x = execute(a[0]);
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if (isexit(x))
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return(true);
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if (isjump(x))
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error(FATAL, "unexpected break, continue or next");
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tempfree(x);
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}
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while (getrec()) {
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x = execute(a[1]);
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if (isexit(x))
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break;
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tempfree(x);
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}
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tempfree(x);
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if (a[2] != NULL) {
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x = execute(a[2]);
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if (isbreak(x) || isnext(x) || iscont(x))
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error(FATAL, "unexpected break, continue or next");
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tempfree(x);
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}
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return(true);
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}
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CELL *getline()
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{
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register CELL *x;
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x = gettemp();
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setfval(x, (awkfloat) getrec());
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return(x);
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}
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CELL *array(a,n) register NODE **a;
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{
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register CELL *x, *y;
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extern CELL *arrayel();
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x = execute(a[1]);
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y = arrayel(a[0], x);
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tempfree(x);
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return(y);
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}
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CELL *arrayel(a, b) NODE *a; CELL *b;
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{
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register char *s;
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register CELL *x;
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register int i;
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register CELL *y;
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s = getsval(b);
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x = (CELL *) a;
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if (!(x->tval&ARR)) {
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xfree(x->sval);
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x->tval &= ~STR;
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x->tval |= ARR;
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x->sval = (char *) makesymtab();
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}
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y = setsymtab(s, tostring(""), 0.0, STR|NUM, x->sval);
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y->ctype = OCELL;
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y->csub = CVAR;
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return(y);
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}
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CELL *matchop(a,n) NODE **a;
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{
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register CELL *x;
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register char *s;
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register int i;
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x = execute(a[0]);
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s = getsval(x);
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tempfree(x);
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i = match(a[1], s);
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if (n == MATCH && i == 1 || n == NOTMATCH && i == 0)
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return(true);
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else
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return(false);
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}
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CELL *boolop(a,n) NODE **a;
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{
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register CELL *x, *y;
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register int i;
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x = execute(a[0]);
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i = istrue(x);
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tempfree(x);
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switch (n) {
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case BOR:
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if (i) return(true);
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y = execute(a[1]);
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i = istrue(y);
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tempfree(y);
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if (i) return(true);
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else return(false);
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case AND:
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if ( !i ) return(false);
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y = execute(a[1]);
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i = istrue(y);
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tempfree(y);
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if (i) return(true);
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else return(false);
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case NOT:
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if (i) return(false);
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else return(true);
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default:
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error(FATAL, "unknown boolean operator %d", n);
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}
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}
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CELL *relop(a,n) NODE **a;
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{
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register int i;
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register CELL *x, *y;
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awkfloat j;
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x = execute(a[0]);
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y = execute(a[1]);
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if (x->tval&NUM && y->tval&NUM) {
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j = x->fval - y->fval;
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i = j<0? -1: (j>0? 1: 0);
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} else {
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i = strcmp(getsval(x), getsval(y));
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}
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tempfree(x);
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tempfree(y);
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switch (n) {
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case LT: if (i<0) return(true);
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else return(false);
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case LE: if (i<=0) return(true);
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else return(false);
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case NE: if (i!=0) return(true);
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else return(false);
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case EQ: if (i == 0) return(true);
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else return(false);
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case GE: if (i>=0) return(true);
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else return(false);
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case GT: if (i>0) return(true);
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else return(false);
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default:
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error(FATAL, "unknown relational operator %d", n);
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}
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}
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CELL *gettemp()
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{
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register int i;
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register CELL *x;
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for (i=0; i<MAXTMP; i++)
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if (tmps[i].tval == 0)
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break;
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if (i == MAXTMP)
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error(FATAL, "out of temporaries in gettemp");
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tmps[i] = tempcell;
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x = &tmps[i];
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return(x);
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}
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CELL *indirect(a,n) NODE **a;
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{
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register CELL *x;
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register int m;
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CELL *fieldadr();
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x = execute(a[0]);
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m = getfval(x);
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tempfree(x);
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x = fieldadr(m);
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x->ctype = OCELL;
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x->csub = CFLD;
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return(x);
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}
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CELL *substr(a, nnn) NODE **a;
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{
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register int k, m, n;
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register char *s, temp;
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register CELL *x;
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x = execute(a[0]);
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s = getsval(x);
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k = strlen(s) + 1;
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tempfree(x);
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if (k <= 1) {
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x = gettemp();
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setsval(x, "");
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return(x);
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}
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x = execute(a[1]);
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m = getfval(x);
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if (m <= 0)
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m = 1;
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else if (m > k)
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m = k;
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tempfree(x);
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if (a[2] != 0) {
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x = execute(a[2]);
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n = getfval(x);
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tempfree(x);
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}
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else
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n = k - 1;
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if (n < 0)
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n = 0;
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else if (n > k - m)
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n = k - m;
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dprintf("substr: m=%d, n=%d, s=%s\n", m, n, s);
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x = gettemp();
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temp = s[n+m-1];
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s[n+m-1] = '\0';
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setsval(x, s + m - 1);
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s[n+m-1] = temp;
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return(x);
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}
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CELL *sindex(a, nnn) NODE **a;
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{
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register CELL *x;
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register char *s1, *s2, *p1, *p2, *q;
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x = execute(a[0]);
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s1 = getsval(x);
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tempfree(x);
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x = execute(a[1]);
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s2 = getsval(x);
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tempfree(x);
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x = gettemp();
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for (p1 = s1; *p1 != '\0'; p1++) {
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for (q=p1, p2=s2; *p2 != '\0' && *q == *p2; q++, p2++)
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;
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if (*p2 == '\0') {
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setfval(x, (awkfloat) (p1 - s1 + 1)); /* origin 1 */
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return(x);
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}
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}
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setfval(x, 0.0);
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return(x);
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}
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char *format(s,a) char *s; NODE *a;
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{
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register char *buf, *p, *t, *os;
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char fmt[200];
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register CELL *x;
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int flag = 0;
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awkfloat xf;
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os = s;
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p = buf = (char *)malloc(RECSIZE);
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while (*s) {
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if (*s != '%') {
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*p++ = *s++;
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continue;
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}
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if (*(s+1) == '%') {
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*p++ = '%';
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s += 2;
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continue;
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}
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for (t=fmt; (*t++ = *s) != '\0'; s++)
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if (*s >= 'a' && *s <= 'z' && *s != 'l')
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break;
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*t = '\0';
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if (t >= fmt + sizeof(fmt))
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error(FATAL, "format item %.20s... too long", os);
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switch (*s) {
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case 'f': case 'e': case 'g':
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flag = 1;
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break;
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case 'd':
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flag = 2;
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if(*(s-1) == 'l') break;
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*(t-1) = 'l';
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*t = 'd';
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*++t = '\0';
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break;
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case 'o': case 'x':
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flag = *(s-1) == 'l' ? 2 : 3;
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break;
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case 'c':
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flag = 3;
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break;
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case 's':
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flag = 4;
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break;
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default:
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flag = 0;
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break;
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}
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if (flag == 0) {
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sprintf(p, "%s", fmt);
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p += strlen(p);
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continue;
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}
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if (a == NULL)
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error(FATAL, "not enough arguments in printf(%s)", os);
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x = execute(a);
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a = a->nnext;
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if (flag != 4) /* watch out for converting to numbers! */
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xf = getfval(x);
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if (flag == 1) sprintf(p, fmt, xf);
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else if (flag == 2) sprintf(p, fmt, (long)xf);
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else if (flag == 3) sprintf(p, fmt, (int)xf);
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else if (flag == 4) sprintf(p, fmt, x->sval==NULL ? "" : getsval(x));
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tempfree(x);
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p += strlen(p);
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s++;
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}
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*p = '\0';
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return(buf);
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}
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CELL *asprintf(a,n) NODE **a;
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{
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register CELL *x;
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register NODE *y;
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register char *s;
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y = a[0]->nnext;
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x = execute(a[0]);
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s = format(getsval(x), y);
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tempfree(x);
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x = gettemp();
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x->sval = MAKE_SVAL(s);
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x->tval = STR;
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return(x);
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}
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CELL *arith(a,n) NODE **a;
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{
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awkfloat i, j;
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register CELL *x, *y, *z;
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x = execute(a[0]);
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i = getfval(x);
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tempfree(x);
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if (n != UMINUS) {
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y = execute(a[1]);
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j = getfval(y);
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tempfree(y);
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}
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z = gettemp();
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switch (n) {
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case ADD:
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i += j;
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break;
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case MINUS:
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i -= j;
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break;
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case MULT:
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i *= j;
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break;
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case DIVIDE:
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if (j == 0)
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error(FATAL, "division by zero");
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i /= j;
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break;
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case MOD:
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if (j == 0)
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error(FATAL, "division by zero");
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i = i - j*(long)(i/j);
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break;
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case UMINUS:
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i = -i;
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break;
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default:
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error(FATAL, "illegal arithmetic operator %d", n);
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}
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setfval(z, i);
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return(z);
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}
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CELL *incrdecr(a, n) NODE **a;
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{
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register CELL *x, *z;
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register int k;
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awkfloat xf;
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x = execute(a[0]);
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xf = getfval(x);
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k = (n == PREINCR || n == POSTINCR) ? 1 : -1;
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if (n == PREINCR || n == PREDECR) {
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setfval(x, xf + k);
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return(x);
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}
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z = gettemp();
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setfval(z, xf);
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setfval(x, xf + k);
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tempfree(x);
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return(z);
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}
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CELL *assign(a,n) NODE **a;
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{
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register CELL *x, *y;
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awkfloat xf, yf;
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x = execute(a[0]);
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y = execute(a[1]);
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if (n == ASSIGN) { /* ordinary assignment */
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if ((y->tval & (STR|NUM)) == (STR|NUM)) {
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setsval(x, y->sval);
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x->fval = y->fval;
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x->tval |= NUM;
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}
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else if (y->tval & STR)
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setsval(x, y->sval);
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else if (y->tval & NUM)
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setfval(x, y->fval);
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tempfree(y);
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return(x);
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}
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xf = getfval(x);
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yf = getfval(y);
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switch (n) {
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case ADDEQ:
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xf += yf;
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break;
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case SUBEQ:
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xf -= yf;
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break;
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case MULTEQ:
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xf *= yf;
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break;
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case DIVEQ:
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if (yf == 0)
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error(FATAL, "division by zero");
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xf /= yf;
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break;
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case MODEQ:
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if (yf == 0)
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error(FATAL, "division by zero");
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xf = xf - yf*(long)(xf/yf);
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break;
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default:
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error(FATAL, "illegal assignment operator %d", n);
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break;
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}
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tempfree(y);
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setfval(x, xf);
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return(x);
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}
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CELL *cat(a,q) NODE **a;
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{
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register CELL *x, *y, *z;
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register int n1, n2;
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register char *s;
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x = execute(a[0]);
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y = execute(a[1]);
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getsval(x);
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getsval(y);
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n1 = strlen(x->sval);
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n2 = strlen(y->sval);
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s = (char *) malloc(n1 + n2 + 1);
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strcpy(s, x->sval);
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strcpy(s+n1, y->sval);
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tempfree(y);
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z = gettemp();
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z->sval = s;
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z->tval = STR;
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tempfree(x);
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return(z);
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}
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CELL *pastat(a,n) NODE **a;
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{
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register CELL *x;
|
|
|
|
if (a[0] == 0) {
|
|
if (a[1] == 0)
|
|
x = true;
|
|
else
|
|
x = execute(a[1]);
|
|
}
|
|
else {
|
|
x = execute(a[0]);
|
|
if (istrue(x)) {
|
|
tempfree(x);
|
|
x = execute(a[1]);
|
|
}
|
|
}
|
|
return(x);
|
|
}
|
|
|
|
CELL *dopa2(a,n) NODE **a;
|
|
{
|
|
register CELL *x;
|
|
register int pair;
|
|
|
|
pair = (int) a[3];
|
|
if (pairstack[pair] == 0) {
|
|
x = execute(a[0]);
|
|
if (istrue(x))
|
|
pairstack[pair] = 1;
|
|
tempfree(x);
|
|
}
|
|
if (pairstack[pair] == 1) {
|
|
x = execute(a[1]);
|
|
if (istrue(x))
|
|
pairstack[pair] = 0;
|
|
tempfree(x);
|
|
x = execute(a[2]);
|
|
return(x);
|
|
}
|
|
return(false);
|
|
}
|
|
|
|
CELL *aprintf(a,n) NODE **a;
|
|
{
|
|
register CELL *x;
|
|
|
|
x = asprintf(a,n);
|
|
if (a[1] == NULL) {
|
|
printf("%s", x->sval);
|
|
tempfree(x);
|
|
return(true);
|
|
}
|
|
redirprint(x->sval, (int)a[1], a[2]);
|
|
return(x);
|
|
}
|
|
static int ctest[0200];
|
|
|
|
CELL *split(a,nnn) NODE **a;
|
|
{
|
|
register CELL *x;
|
|
register CELL *ap;
|
|
register char *s, *p;
|
|
char *t, temp, num[5];
|
|
register int sep;
|
|
int n, flag;
|
|
|
|
x = execute(a[0]);
|
|
s = getsval(x);
|
|
tempfree(x);
|
|
if (a[2] == 0)
|
|
sep = **FS;
|
|
else {
|
|
x = execute(a[2]);
|
|
sep = getsval(x)[0];
|
|
tempfree(x);
|
|
}
|
|
ap = (CELL *) a[1];
|
|
freesymtab(ap);
|
|
dprintf("split: s=|%s|, a=%s, sep=|%c|\n", s, ap->nval, sep);
|
|
ap->tval &= ~STR;
|
|
ap->tval |= ARR;
|
|
ap->sval = (char *) makesymtab();
|
|
|
|
n = 0;
|
|
if (sep == ' ')
|
|
for (n = 0; ; ) {
|
|
while (*s == ' ' || *s == '\t' || *s == '\n')
|
|
s++;
|
|
if (*s == 0)
|
|
break;
|
|
n++;
|
|
t = s;
|
|
ctest[' '] = ctest['\t'] = ctest['\n'] = ctest['\0'] =1;
|
|
do
|
|
s++;
|
|
/*while (*s!=' ' && *s!='\t' && *s!='\n' && *s!='\0');*/
|
|
while(!ctest[*s]);
|
|
ctest[' '] = ctest['\t'] = ctest['\n'] = ctest['\0'] =0;
|
|
temp = *s;
|
|
*s = '\0';
|
|
sprintf(num, "%d", n);
|
|
if (isnumber(t))
|
|
setsymtab(num, tostring(t), atof(t), STR|NUM, ap->sval);
|
|
else
|
|
setsymtab(num, tostring(t), 0.0, STR, ap->sval);
|
|
*s = temp;
|
|
if (*s != 0)
|
|
s++;
|
|
}
|
|
else if (*s != 0)
|
|
for (;;) {
|
|
n++;
|
|
t = s;
|
|
ctest[sep] = ctest['\n'] = ctest['\0'] = 1;
|
|
while(!ctest[*s])
|
|
/*while (*s != sep && *s != '\n' && *s != '\0')*/
|
|
s++;
|
|
ctest[sep] = ctest['\n'] = ctest['\0'] = 0;
|
|
temp = *s;
|
|
*s = '\0';
|
|
sprintf(num, "%d", n);
|
|
if (isnumber(t))
|
|
setsymtab(num, tostring(t), atof(t), STR|NUM, ap->sval);
|
|
else
|
|
setsymtab(num, tostring(t), 0.0, STR, ap->sval);
|
|
*s = temp;
|
|
if (*s++ == 0)
|
|
break;
|
|
}
|
|
x = gettemp();
|
|
x->tval = NUM;
|
|
x->fval = n;
|
|
return(x);
|
|
}
|
|
|
|
CELL *ifstat(a,n) NODE **a;
|
|
{
|
|
register CELL *x;
|
|
|
|
x = execute(a[0]);
|
|
if (istrue(x)) {
|
|
tempfree(x);
|
|
if (a[1]==0)
|
|
x = true;
|
|
else
|
|
x = execute(a[1]);
|
|
}
|
|
else if (a[2] != 0) {
|
|
tempfree(x);
|
|
x = execute(a[2]);
|
|
}
|
|
return(x);
|
|
}
|
|
|
|
CELL *whilestat(a,n) NODE **a;
|
|
{
|
|
register CELL *x;
|
|
|
|
for (;;) {
|
|
x = execute(a[0]);
|
|
if (!istrue(x)) return(x);
|
|
tempfree(x);
|
|
x = execute(a[1]);
|
|
if (isbreak(x)) {
|
|
x = true;
|
|
return(x);
|
|
}
|
|
if (isnext(x) || isexit(x))
|
|
return(x);
|
|
tempfree(x);
|
|
}
|
|
}
|
|
|
|
CELL *forstat(a,n) NODE **a;
|
|
{
|
|
register CELL *x;
|
|
register CELL *z;
|
|
|
|
z = execute(a[0]);
|
|
tempfree(z);
|
|
for (;;) {
|
|
if (a[1]!=0) {
|
|
x = execute(a[1]);
|
|
if (!istrue(x)) return(x);
|
|
else tempfree(x);
|
|
}
|
|
x = execute(a[3]);
|
|
if (isbreak(x)) { /* turn off break */
|
|
x = true;
|
|
return(x);
|
|
}
|
|
if (isnext(x) || isexit(x))
|
|
return(x);
|
|
tempfree(x);
|
|
if ( a[2] != 0 ) {
|
|
z = execute(a[2]);
|
|
tempfree(z);
|
|
}
|
|
}
|
|
}
|
|
|
|
CELL *instat(a, n) NODE **a;
|
|
{
|
|
register CELL *vp, *arrayp, *cp, **tp;
|
|
register CELL *x;
|
|
int i;
|
|
|
|
vp = (CELL *) a[0];
|
|
arrayp = (CELL *) a[1];
|
|
if (!(arrayp->tval & ARR))
|
|
error(FATAL, "%s is not an array", arrayp->nval);
|
|
tp = (CELL **) arrayp->sval;
|
|
for (i = 0; i < MAXSYM; i++) { /* this routine knows too much */
|
|
for (cp = tp[i]; cp != NULL; cp = cp->nextval) {
|
|
setsval(vp, cp->nval);
|
|
x = execute(a[2]);
|
|
if (isbreak(x)) {
|
|
tempfree(x);
|
|
x = true;
|
|
return(x);
|
|
}
|
|
if (isnext(x) || isexit(x))
|
|
return(x);
|
|
tempfree(x);
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
CELL *jump(a, n) NODE **a;
|
|
{
|
|
register CELL *y;
|
|
|
|
switch (n) {
|
|
case EXIT:
|
|
if (a[0] != 0) {
|
|
y = execute(a[0]);
|
|
errorflag = getfval(y);
|
|
}
|
|
return(jexit);
|
|
case NEXT:
|
|
return(jnext);
|
|
case BREAK:
|
|
return(jbreak);
|
|
case CONTINUE:
|
|
return(jcont);
|
|
default:
|
|
error(FATAL, "illegal jump type %d", n);
|
|
}
|
|
}
|
|
|
|
CELL *fncn(a,n) NODE **a;
|
|
{
|
|
register CELL *x;
|
|
awkfloat u;
|
|
register int t;
|
|
|
|
t = (int) a[0];
|
|
x = execute(a[1]);
|
|
if (t == FLENGTH)
|
|
u = (awkfloat) strlen(getsval(x));
|
|
else if (t == FLOG)
|
|
u = log(getfval(x));
|
|
else if (t == FINT)
|
|
u = (awkfloat) (long) getfval(x);
|
|
else if (t == FEXP)
|
|
u = exp(getfval(x));
|
|
else if (t == FSQRT)
|
|
u = sqrt(getfval(x));
|
|
else
|
|
error(FATAL, "illegal function type %d", t);
|
|
tempfree(x);
|
|
x = gettemp();
|
|
setfval(x, u);
|
|
return(x);
|
|
}
|
|
|
|
CELL *print(a,n) NODE **a;
|
|
{
|
|
register NODE *x;
|
|
register CELL *y;
|
|
char s[RECSIZE];
|
|
|
|
s[0] = '\0';
|
|
for (x=a[0]; x!=NULL; x=x->nnext) {
|
|
y = execute(x);
|
|
strcat(s, getsval(y));
|
|
tempfree(y);
|
|
if (x->nnext == NULL)
|
|
strcat(s, *ORS);
|
|
else
|
|
strcat(s, *OFS);
|
|
}
|
|
if (strlen(s) >= RECSIZE)
|
|
error(FATAL, "string %.20s ... too long to print", s);
|
|
if (a[1] == 0) {
|
|
printf("%s", s);
|
|
return(true);
|
|
}
|
|
redirprint(s, (int)a[1], a[2]);
|
|
return(false);
|
|
}
|
|
|
|
CELL *nullproc() {}
|
|
|
|
CELL *nodetoobj(a) NODE *a;
|
|
{
|
|
register CELL *x;
|
|
|
|
x= (CELL *) a->nobj;
|
|
x->ctype = OCELL;
|
|
x->csub = a->subtype;
|
|
if (isfld(x))
|
|
fldbld();
|
|
return(x);
|
|
}
|
|
|
|
redirprint(s, a, b) char *s; NODE *b;
|
|
{
|
|
register int i;
|
|
register CELL *x;
|
|
|
|
x = execute(b);
|
|
getsval(x);
|
|
for (i=0; i<FILENUM; i++)
|
|
if (files[i].fname && strcmp(x->sval, files[i].fname) == 0)
|
|
goto doit;
|
|
for (i=0; i<FILENUM; i++)
|
|
if (files[i].fp == 0)
|
|
break;
|
|
if (i >= FILENUM)
|
|
error(FATAL, "too many output files %d", i);
|
|
if (a == '|') /* a pipe! */
|
|
files[i].fp = popen(x->sval, "w");
|
|
else if (a == APPEND)
|
|
files[i].fp = fopen(x->sval, "a");
|
|
else
|
|
files[i].fp = fopen(x->sval, "w");
|
|
if (files[i].fp == NULL)
|
|
error(FATAL, "can't open file %s", x->sval);
|
|
files[i].fname = tostring(x->sval);
|
|
doit:
|
|
fprintf(files[i].fp, "%s", s);
|
|
#ifndef gcos
|
|
fflush(files[i].fp); /* in case someone is waiting for the output */
|
|
#endif
|
|
tempfree(x);
|
|
}
|