xref: /inferno-os/utils/awk/lib.c (revision 74a4d8c26dd3c1e9febcb717cfd6cb6512991a7a)
1*74a4d8c2SCharles.Forsyth /****************************************************************
2*74a4d8c2SCharles.Forsyth Copyright (C) Lucent Technologies 1997
3*74a4d8c2SCharles.Forsyth All Rights Reserved
4*74a4d8c2SCharles.Forsyth 
5*74a4d8c2SCharles.Forsyth Permission to use, copy, modify, and distribute this software and
6*74a4d8c2SCharles.Forsyth its documentation for any purpose and without fee is hereby
7*74a4d8c2SCharles.Forsyth granted, provided that the above copyright notice appear in all
8*74a4d8c2SCharles.Forsyth copies and that both that the copyright notice and this
9*74a4d8c2SCharles.Forsyth permission notice and warranty disclaimer appear in supporting
10*74a4d8c2SCharles.Forsyth documentation, and that the name Lucent Technologies or any of
11*74a4d8c2SCharles.Forsyth its entities not be used in advertising or publicity pertaining
12*74a4d8c2SCharles.Forsyth to distribution of the software without specific, written prior
13*74a4d8c2SCharles.Forsyth permission.
14*74a4d8c2SCharles.Forsyth 
15*74a4d8c2SCharles.Forsyth LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
16*74a4d8c2SCharles.Forsyth INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
17*74a4d8c2SCharles.Forsyth IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
18*74a4d8c2SCharles.Forsyth SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
19*74a4d8c2SCharles.Forsyth WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
20*74a4d8c2SCharles.Forsyth IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
21*74a4d8c2SCharles.Forsyth ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
22*74a4d8c2SCharles.Forsyth THIS SOFTWARE.
23*74a4d8c2SCharles.Forsyth ****************************************************************/
24*74a4d8c2SCharles.Forsyth 
25*74a4d8c2SCharles.Forsyth #define DEBUG
26*74a4d8c2SCharles.Forsyth #include <stdio.h>
27*74a4d8c2SCharles.Forsyth #include <string.h>
28*74a4d8c2SCharles.Forsyth #include <ctype.h>
29*74a4d8c2SCharles.Forsyth #include <errno.h>
30*74a4d8c2SCharles.Forsyth #include <stdlib.h>
31*74a4d8c2SCharles.Forsyth #include <stdarg.h>
32*74a4d8c2SCharles.Forsyth #include "awk.h"
33*74a4d8c2SCharles.Forsyth #include "ytab.h"
34*74a4d8c2SCharles.Forsyth 
35*74a4d8c2SCharles.Forsyth FILE	*infile	= NULL;
36*74a4d8c2SCharles.Forsyth char	*file	= "";
37*74a4d8c2SCharles.Forsyth char	*record;
38*74a4d8c2SCharles.Forsyth int	recsize	= RECSIZE;
39*74a4d8c2SCharles.Forsyth char	*fields;
40*74a4d8c2SCharles.Forsyth int	fieldssize = RECSIZE;
41*74a4d8c2SCharles.Forsyth 
42*74a4d8c2SCharles.Forsyth Cell	**fldtab;	/* pointers to Cells */
43*74a4d8c2SCharles.Forsyth char	inputFS[100] = " ";
44*74a4d8c2SCharles.Forsyth 
45*74a4d8c2SCharles.Forsyth #define	MAXFLD	200
46*74a4d8c2SCharles.Forsyth int	nfields	= MAXFLD;	/* last allocated slot for $i */
47*74a4d8c2SCharles.Forsyth 
48*74a4d8c2SCharles.Forsyth int	donefld;	/* 1 = implies rec broken into fields */
49*74a4d8c2SCharles.Forsyth int	donerec;	/* 1 = record is valid (no flds have changed) */
50*74a4d8c2SCharles.Forsyth 
51*74a4d8c2SCharles.Forsyth int	lastfld	= 0;	/* last used field */
52*74a4d8c2SCharles.Forsyth int	argno	= 1;	/* current input argument number */
53*74a4d8c2SCharles.Forsyth extern	Awkfloat *ARGC;
54*74a4d8c2SCharles.Forsyth 
55*74a4d8c2SCharles.Forsyth static Cell dollar0 = { OCELL, CFLD, NULL, "", 0.0, REC|STR|DONTFREE };
56*74a4d8c2SCharles.Forsyth static Cell dollar1 = { OCELL, CFLD, NULL, "", 0.0, FLD|STR|DONTFREE };
57*74a4d8c2SCharles.Forsyth 
recinit(unsigned int n)58*74a4d8c2SCharles.Forsyth void recinit(unsigned int n)
59*74a4d8c2SCharles.Forsyth {
60*74a4d8c2SCharles.Forsyth 	record = (char *) malloc(n);
61*74a4d8c2SCharles.Forsyth 	fields = (char *) malloc(n);
62*74a4d8c2SCharles.Forsyth 	fldtab = (Cell **) malloc((nfields+1) * sizeof(Cell *));
63*74a4d8c2SCharles.Forsyth 	if (record == NULL || fields == NULL || fldtab == NULL)
64*74a4d8c2SCharles.Forsyth 		FATAL("out of space for $0 and fields");
65*74a4d8c2SCharles.Forsyth 
66*74a4d8c2SCharles.Forsyth 	fldtab[0] = (Cell *) malloc(sizeof (Cell));
67*74a4d8c2SCharles.Forsyth 	*fldtab[0] = dollar0;
68*74a4d8c2SCharles.Forsyth 	fldtab[0]->sval = record;
69*74a4d8c2SCharles.Forsyth 	fldtab[0]->nval = tostring("0");
70*74a4d8c2SCharles.Forsyth 	makefields(1, nfields);
71*74a4d8c2SCharles.Forsyth }
72*74a4d8c2SCharles.Forsyth 
makefields(int n1,int n2)73*74a4d8c2SCharles.Forsyth void makefields(int n1, int n2)		/* create $n1..$n2 inclusive */
74*74a4d8c2SCharles.Forsyth {
75*74a4d8c2SCharles.Forsyth 	char temp[50];
76*74a4d8c2SCharles.Forsyth 	int i;
77*74a4d8c2SCharles.Forsyth 
78*74a4d8c2SCharles.Forsyth 	for (i = n1; i <= n2; i++) {
79*74a4d8c2SCharles.Forsyth 		fldtab[i] = (Cell *) malloc(sizeof (struct Cell));
80*74a4d8c2SCharles.Forsyth 		if (fldtab[i] == NULL)
81*74a4d8c2SCharles.Forsyth 			FATAL("out of space in makefields %d", i);
82*74a4d8c2SCharles.Forsyth 		*fldtab[i] = dollar1;
83*74a4d8c2SCharles.Forsyth 		sprintf(temp, "%d", i);
84*74a4d8c2SCharles.Forsyth 		fldtab[i]->nval = tostring(temp);
85*74a4d8c2SCharles.Forsyth 	}
86*74a4d8c2SCharles.Forsyth }
87*74a4d8c2SCharles.Forsyth 
initgetrec(void)88*74a4d8c2SCharles.Forsyth void initgetrec(void)
89*74a4d8c2SCharles.Forsyth {
90*74a4d8c2SCharles.Forsyth 	int i;
91*74a4d8c2SCharles.Forsyth 	char *p;
92*74a4d8c2SCharles.Forsyth 
93*74a4d8c2SCharles.Forsyth 	for (i = 1; i < *ARGC; i++) {
94*74a4d8c2SCharles.Forsyth 		if (!isclvar(p = getargv(i))) {	/* find 1st real filename */
95*74a4d8c2SCharles.Forsyth 			setsval(lookup("FILENAME", symtab), getargv(i));
96*74a4d8c2SCharles.Forsyth 			return;
97*74a4d8c2SCharles.Forsyth 		}
98*74a4d8c2SCharles.Forsyth 		setclvar(p);	/* a commandline assignment before filename */
99*74a4d8c2SCharles.Forsyth 		argno++;
100*74a4d8c2SCharles.Forsyth 	}
101*74a4d8c2SCharles.Forsyth 	infile = stdin;		/* no filenames, so use stdin */
102*74a4d8c2SCharles.Forsyth }
103*74a4d8c2SCharles.Forsyth 
getrec(char ** pbuf,int * pbufsize,int isrecord)104*74a4d8c2SCharles.Forsyth int getrec(char **pbuf, int *pbufsize, int isrecord)	/* get next input record */
105*74a4d8c2SCharles.Forsyth {			/* note: cares whether buf == record */
106*74a4d8c2SCharles.Forsyth 	int c;
107*74a4d8c2SCharles.Forsyth 	static int firsttime = 1;
108*74a4d8c2SCharles.Forsyth 	char *buf = *pbuf;
109*74a4d8c2SCharles.Forsyth 	int bufsize = *pbufsize;
110*74a4d8c2SCharles.Forsyth 
111*74a4d8c2SCharles.Forsyth 	if (firsttime) {
112*74a4d8c2SCharles.Forsyth 		firsttime = 0;
113*74a4d8c2SCharles.Forsyth 		initgetrec();
114*74a4d8c2SCharles.Forsyth 	}
115*74a4d8c2SCharles.Forsyth 	   dprintf( ("RS=<%s>, FS=<%s>, ARGC=%g, FILENAME=%s\n",
116*74a4d8c2SCharles.Forsyth 		*RS, *FS, *ARGC, *FILENAME) );
117*74a4d8c2SCharles.Forsyth 	if (isrecord) {
118*74a4d8c2SCharles.Forsyth 		donefld = 0;
119*74a4d8c2SCharles.Forsyth 		donerec = 1;
120*74a4d8c2SCharles.Forsyth 	}
121*74a4d8c2SCharles.Forsyth 	buf[0] = 0;
122*74a4d8c2SCharles.Forsyth 	while (argno < *ARGC || infile == stdin) {
123*74a4d8c2SCharles.Forsyth 		   dprintf( ("argno=%d, file=|%s|\n", argno, file) );
124*74a4d8c2SCharles.Forsyth 		if (infile == NULL) {	/* have to open a new file */
125*74a4d8c2SCharles.Forsyth 			file = getargv(argno);
126*74a4d8c2SCharles.Forsyth 			if (*file == '\0') {	/* it's been zapped */
127*74a4d8c2SCharles.Forsyth 				argno++;
128*74a4d8c2SCharles.Forsyth 				continue;
129*74a4d8c2SCharles.Forsyth 			}
130*74a4d8c2SCharles.Forsyth 			if (isclvar(file)) {	/* a var=value arg */
131*74a4d8c2SCharles.Forsyth 				setclvar(file);
132*74a4d8c2SCharles.Forsyth 				argno++;
133*74a4d8c2SCharles.Forsyth 				continue;
134*74a4d8c2SCharles.Forsyth 			}
135*74a4d8c2SCharles.Forsyth 			*FILENAME = file;
136*74a4d8c2SCharles.Forsyth 			   dprintf( ("opening file %s\n", file) );
137*74a4d8c2SCharles.Forsyth 			if (*file == '-' && *(file+1) == '\0')
138*74a4d8c2SCharles.Forsyth 				infile = stdin;
139*74a4d8c2SCharles.Forsyth 			else if ((infile = fopen(file, "r")) == NULL)
140*74a4d8c2SCharles.Forsyth 				FATAL("can't open file %s", file);
141*74a4d8c2SCharles.Forsyth 			setfval(fnrloc, 0.0);
142*74a4d8c2SCharles.Forsyth 		}
143*74a4d8c2SCharles.Forsyth 		c = readrec(&buf, &bufsize, infile);
144*74a4d8c2SCharles.Forsyth 		if (c != 0 || buf[0] != '\0') {	/* normal record */
145*74a4d8c2SCharles.Forsyth 			if (isrecord) {
146*74a4d8c2SCharles.Forsyth 				if (freeable(fldtab[0]))
147*74a4d8c2SCharles.Forsyth 					xfree(fldtab[0]->sval);
148*74a4d8c2SCharles.Forsyth 				fldtab[0]->sval = buf;	/* buf == record */
149*74a4d8c2SCharles.Forsyth 				fldtab[0]->tval = REC | STR | DONTFREE;
150*74a4d8c2SCharles.Forsyth 				if (is_number(fldtab[0]->sval)) {
151*74a4d8c2SCharles.Forsyth 					fldtab[0]->fval = atof(fldtab[0]->sval);
152*74a4d8c2SCharles.Forsyth 					fldtab[0]->tval |= NUM;
153*74a4d8c2SCharles.Forsyth 				}
154*74a4d8c2SCharles.Forsyth 			}
155*74a4d8c2SCharles.Forsyth 			setfval(nrloc, nrloc->fval+1);
156*74a4d8c2SCharles.Forsyth 			setfval(fnrloc, fnrloc->fval+1);
157*74a4d8c2SCharles.Forsyth 			*pbuf = buf;
158*74a4d8c2SCharles.Forsyth 			*pbufsize = bufsize;
159*74a4d8c2SCharles.Forsyth 			return 1;
160*74a4d8c2SCharles.Forsyth 		}
161*74a4d8c2SCharles.Forsyth 		/* EOF arrived on this file; set up next */
162*74a4d8c2SCharles.Forsyth 		if (infile != stdin)
163*74a4d8c2SCharles.Forsyth 			fclose(infile);
164*74a4d8c2SCharles.Forsyth 		infile = NULL;
165*74a4d8c2SCharles.Forsyth 		argno++;
166*74a4d8c2SCharles.Forsyth 	}
167*74a4d8c2SCharles.Forsyth 	*pbuf = buf;
168*74a4d8c2SCharles.Forsyth 	*pbufsize = bufsize;
169*74a4d8c2SCharles.Forsyth 	return 0;	/* true end of file */
170*74a4d8c2SCharles.Forsyth }
171*74a4d8c2SCharles.Forsyth 
nextfile(void)172*74a4d8c2SCharles.Forsyth void nextfile(void)
173*74a4d8c2SCharles.Forsyth {
174*74a4d8c2SCharles.Forsyth 	if (infile != stdin)
175*74a4d8c2SCharles.Forsyth 		fclose(infile);
176*74a4d8c2SCharles.Forsyth 	infile = NULL;
177*74a4d8c2SCharles.Forsyth 	argno++;
178*74a4d8c2SCharles.Forsyth }
179*74a4d8c2SCharles.Forsyth 
readrec(char ** pbuf,int * pbufsize,FILE * inf)180*74a4d8c2SCharles.Forsyth int readrec(char **pbuf, int *pbufsize, FILE *inf)	/* read one record into buf */
181*74a4d8c2SCharles.Forsyth {
182*74a4d8c2SCharles.Forsyth 	int sep, c;
183*74a4d8c2SCharles.Forsyth 	char *rr, *buf = *pbuf;
184*74a4d8c2SCharles.Forsyth 	int bufsize = *pbufsize;
185*74a4d8c2SCharles.Forsyth 
186*74a4d8c2SCharles.Forsyth 	if (strlen(*FS) >= sizeof(inputFS))
187*74a4d8c2SCharles.Forsyth 		FATAL("field separator %.10s... is too long", *FS);
188*74a4d8c2SCharles.Forsyth 	strcpy(inputFS, *FS);	/* for subsequent field splitting */
189*74a4d8c2SCharles.Forsyth 	if ((sep = **RS) == 0) {
190*74a4d8c2SCharles.Forsyth 		sep = '\n';
191*74a4d8c2SCharles.Forsyth 		while ((c=getc(inf)) == '\n' && c != EOF)	/* skip leading \n's */
192*74a4d8c2SCharles.Forsyth 			;
193*74a4d8c2SCharles.Forsyth 		if (c != EOF)
194*74a4d8c2SCharles.Forsyth 			ungetc(c, inf);
195*74a4d8c2SCharles.Forsyth 	}
196*74a4d8c2SCharles.Forsyth 	for (rr = buf; ; ) {
197*74a4d8c2SCharles.Forsyth 		for (; (c=getc(inf)) != sep && c != EOF; ) {
198*74a4d8c2SCharles.Forsyth 			if (rr-buf+1 > bufsize)
199*74a4d8c2SCharles.Forsyth 				if (!adjbuf(&buf, &bufsize, 1+rr-buf, recsize, &rr, "readrec 1"))
200*74a4d8c2SCharles.Forsyth 					FATAL("input record `%.30s...' too long", buf);
201*74a4d8c2SCharles.Forsyth 			*rr++ = c;
202*74a4d8c2SCharles.Forsyth 		}
203*74a4d8c2SCharles.Forsyth 		if (**RS == sep || c == EOF)
204*74a4d8c2SCharles.Forsyth 			break;
205*74a4d8c2SCharles.Forsyth 		if ((c = getc(inf)) == '\n' || c == EOF) /* 2 in a row */
206*74a4d8c2SCharles.Forsyth 			break;
207*74a4d8c2SCharles.Forsyth 		if (!adjbuf(&buf, &bufsize, 2+rr-buf, recsize, &rr, "readrec 2"))
208*74a4d8c2SCharles.Forsyth 			FATAL("input record `%.30s...' too long", buf);
209*74a4d8c2SCharles.Forsyth 		*rr++ = '\n';
210*74a4d8c2SCharles.Forsyth 		*rr++ = c;
211*74a4d8c2SCharles.Forsyth 	}
212*74a4d8c2SCharles.Forsyth 	if (!adjbuf(&buf, &bufsize, 1+rr-buf, recsize, &rr, "readrec 3"))
213*74a4d8c2SCharles.Forsyth 		FATAL("input record `%.30s...' too long", buf);
214*74a4d8c2SCharles.Forsyth 	*rr = 0;
215*74a4d8c2SCharles.Forsyth 	   dprintf( ("readrec saw <%s>, returns %d\n", buf, c == EOF && rr == buf ? 0 : 1) );
216*74a4d8c2SCharles.Forsyth 	*pbuf = buf;
217*74a4d8c2SCharles.Forsyth 	*pbufsize = bufsize;
218*74a4d8c2SCharles.Forsyth 	return c == EOF && rr == buf ? 0 : 1;
219*74a4d8c2SCharles.Forsyth }
220*74a4d8c2SCharles.Forsyth 
getargv(int n)221*74a4d8c2SCharles.Forsyth char *getargv(int n)	/* get ARGV[n] */
222*74a4d8c2SCharles.Forsyth {
223*74a4d8c2SCharles.Forsyth 	Cell *x;
224*74a4d8c2SCharles.Forsyth 	char *s, temp[50];
225*74a4d8c2SCharles.Forsyth 	extern Array *ARGVtab;
226*74a4d8c2SCharles.Forsyth 
227*74a4d8c2SCharles.Forsyth 	sprintf(temp, "%d", n);
228*74a4d8c2SCharles.Forsyth 	x = setsymtab(temp, "", 0.0, STR, ARGVtab);
229*74a4d8c2SCharles.Forsyth 	s = getsval(x);
230*74a4d8c2SCharles.Forsyth 	   dprintf( ("getargv(%d) returns |%s|\n", n, s) );
231*74a4d8c2SCharles.Forsyth 	return s;
232*74a4d8c2SCharles.Forsyth }
233*74a4d8c2SCharles.Forsyth 
setclvar(char * s)234*74a4d8c2SCharles.Forsyth void setclvar(char *s)	/* set var=value from s */
235*74a4d8c2SCharles.Forsyth {
236*74a4d8c2SCharles.Forsyth 	char *p;
237*74a4d8c2SCharles.Forsyth 	Cell *q;
238*74a4d8c2SCharles.Forsyth 
239*74a4d8c2SCharles.Forsyth 	for (p=s; *p != '='; p++)
240*74a4d8c2SCharles.Forsyth 		;
241*74a4d8c2SCharles.Forsyth 	*p++ = 0;
242*74a4d8c2SCharles.Forsyth 	p = qstring(p, '\0');
243*74a4d8c2SCharles.Forsyth 	q = setsymtab(s, p, 0.0, STR, symtab);
244*74a4d8c2SCharles.Forsyth 	setsval(q, p);
245*74a4d8c2SCharles.Forsyth 	if (is_number(q->sval)) {
246*74a4d8c2SCharles.Forsyth 		q->fval = atof(q->sval);
247*74a4d8c2SCharles.Forsyth 		q->tval |= NUM;
248*74a4d8c2SCharles.Forsyth 	}
249*74a4d8c2SCharles.Forsyth 	   dprintf( ("command line set %s to |%s|\n", s, p) );
250*74a4d8c2SCharles.Forsyth }
251*74a4d8c2SCharles.Forsyth 
252*74a4d8c2SCharles.Forsyth 
fldbld(void)253*74a4d8c2SCharles.Forsyth void fldbld(void)	/* create fields from current record */
254*74a4d8c2SCharles.Forsyth {
255*74a4d8c2SCharles.Forsyth 	/* this relies on having fields[] the same length as $0 */
256*74a4d8c2SCharles.Forsyth 	/* the fields are all stored in this one array with \0's */
257*74a4d8c2SCharles.Forsyth 	char *r, *fr, sep;
258*74a4d8c2SCharles.Forsyth 	Cell *p;
259*74a4d8c2SCharles.Forsyth 	int i, j, n;
260*74a4d8c2SCharles.Forsyth 
261*74a4d8c2SCharles.Forsyth 	if (donefld)
262*74a4d8c2SCharles.Forsyth 		return;
263*74a4d8c2SCharles.Forsyth 	if (!isstr(fldtab[0]))
264*74a4d8c2SCharles.Forsyth 		getsval(fldtab[0]);
265*74a4d8c2SCharles.Forsyth 	r = fldtab[0]->sval;
266*74a4d8c2SCharles.Forsyth 	n = strlen(r);
267*74a4d8c2SCharles.Forsyth 	if (n > fieldssize) {
268*74a4d8c2SCharles.Forsyth 		xfree(fields);
269*74a4d8c2SCharles.Forsyth 		if ((fields = (char *) malloc(n+1)) == NULL)
270*74a4d8c2SCharles.Forsyth 			FATAL("out of space for fields in fldbld %d", n);
271*74a4d8c2SCharles.Forsyth 		fieldssize = n;
272*74a4d8c2SCharles.Forsyth 	}
273*74a4d8c2SCharles.Forsyth 	fr = fields;
274*74a4d8c2SCharles.Forsyth 	i = 0;	/* number of fields accumulated here */
275*74a4d8c2SCharles.Forsyth 	if (strlen(inputFS) > 1) {	/* it's a regular expression */
276*74a4d8c2SCharles.Forsyth 		i = refldbld(r, inputFS);
277*74a4d8c2SCharles.Forsyth 	} else if ((sep = *inputFS) == ' ') {	/* default whitespace */
278*74a4d8c2SCharles.Forsyth 		for (i = 0; ; ) {
279*74a4d8c2SCharles.Forsyth 			while (*r == ' ' || *r == '\t' || *r == '\n')
280*74a4d8c2SCharles.Forsyth 				r++;
281*74a4d8c2SCharles.Forsyth 			if (*r == 0)
282*74a4d8c2SCharles.Forsyth 				break;
283*74a4d8c2SCharles.Forsyth 			i++;
284*74a4d8c2SCharles.Forsyth 			if (i > nfields)
285*74a4d8c2SCharles.Forsyth 				growfldtab(i);
286*74a4d8c2SCharles.Forsyth 			if (freeable(fldtab[i]))
287*74a4d8c2SCharles.Forsyth 				xfree(fldtab[i]->sval);
288*74a4d8c2SCharles.Forsyth 			fldtab[i]->sval = fr;
289*74a4d8c2SCharles.Forsyth 			fldtab[i]->tval = FLD | STR | DONTFREE;
290*74a4d8c2SCharles.Forsyth 			do
291*74a4d8c2SCharles.Forsyth 				*fr++ = *r++;
292*74a4d8c2SCharles.Forsyth 			while (*r != ' ' && *r != '\t' && *r != '\n' && *r != '\0');
293*74a4d8c2SCharles.Forsyth 			*fr++ = 0;
294*74a4d8c2SCharles.Forsyth 		}
295*74a4d8c2SCharles.Forsyth 		*fr = 0;
296*74a4d8c2SCharles.Forsyth 	} else if ((sep = *inputFS) == 0) {		/* new: FS="" => 1 char/field */
297*74a4d8c2SCharles.Forsyth 		for (i = 0; *r != 0; r++) {
298*74a4d8c2SCharles.Forsyth 			char buf[2];
299*74a4d8c2SCharles.Forsyth 			i++;
300*74a4d8c2SCharles.Forsyth 			if (i > nfields)
301*74a4d8c2SCharles.Forsyth 				growfldtab(i);
302*74a4d8c2SCharles.Forsyth 			if (freeable(fldtab[i]))
303*74a4d8c2SCharles.Forsyth 				xfree(fldtab[i]->sval);
304*74a4d8c2SCharles.Forsyth 			buf[0] = *r;
305*74a4d8c2SCharles.Forsyth 			buf[1] = 0;
306*74a4d8c2SCharles.Forsyth 			fldtab[i]->sval = tostring(buf);
307*74a4d8c2SCharles.Forsyth 			fldtab[i]->tval = FLD | STR;
308*74a4d8c2SCharles.Forsyth 		}
309*74a4d8c2SCharles.Forsyth 		*fr = 0;
310*74a4d8c2SCharles.Forsyth 	} else if (*r != 0) {	/* if 0, it's a null field */
311*74a4d8c2SCharles.Forsyth 		for (;;) {
312*74a4d8c2SCharles.Forsyth 			i++;
313*74a4d8c2SCharles.Forsyth 			if (i > nfields)
314*74a4d8c2SCharles.Forsyth 				growfldtab(i);
315*74a4d8c2SCharles.Forsyth 			if (freeable(fldtab[i]))
316*74a4d8c2SCharles.Forsyth 				xfree(fldtab[i]->sval);
317*74a4d8c2SCharles.Forsyth 			fldtab[i]->sval = fr;
318*74a4d8c2SCharles.Forsyth 			fldtab[i]->tval = FLD | STR | DONTFREE;
319*74a4d8c2SCharles.Forsyth 			while (*r != sep && *r != '\n' && *r != '\0')	/* \n is always a separator */
320*74a4d8c2SCharles.Forsyth 				*fr++ = *r++;
321*74a4d8c2SCharles.Forsyth 			*fr++ = 0;
322*74a4d8c2SCharles.Forsyth 			if (*r++ == 0)
323*74a4d8c2SCharles.Forsyth 				break;
324*74a4d8c2SCharles.Forsyth 		}
325*74a4d8c2SCharles.Forsyth 		*fr = 0;
326*74a4d8c2SCharles.Forsyth 	}
327*74a4d8c2SCharles.Forsyth 	if (i > nfields)
328*74a4d8c2SCharles.Forsyth 		FATAL("record `%.30s...' has too many fields; can't happen", r);
329*74a4d8c2SCharles.Forsyth 	cleanfld(i+1, lastfld);	/* clean out junk from previous record */
330*74a4d8c2SCharles.Forsyth 	lastfld = i;
331*74a4d8c2SCharles.Forsyth 	donefld = 1;
332*74a4d8c2SCharles.Forsyth 	for (j = 1; j <= lastfld; j++) {
333*74a4d8c2SCharles.Forsyth 		p = fldtab[j];
334*74a4d8c2SCharles.Forsyth 		if(is_number(p->sval)) {
335*74a4d8c2SCharles.Forsyth 			p->fval = atof(p->sval);
336*74a4d8c2SCharles.Forsyth 			p->tval |= NUM;
337*74a4d8c2SCharles.Forsyth 		}
338*74a4d8c2SCharles.Forsyth 	}
339*74a4d8c2SCharles.Forsyth 	setfval(nfloc, (Awkfloat) lastfld);
340*74a4d8c2SCharles.Forsyth 	if (dbg) {
341*74a4d8c2SCharles.Forsyth 		for (j = 0; j <= lastfld; j++) {
342*74a4d8c2SCharles.Forsyth 			p = fldtab[j];
343*74a4d8c2SCharles.Forsyth 			printf("field %d (%s): |%s|\n", j, p->nval, p->sval);
344*74a4d8c2SCharles.Forsyth 		}
345*74a4d8c2SCharles.Forsyth 	}
346*74a4d8c2SCharles.Forsyth }
347*74a4d8c2SCharles.Forsyth 
cleanfld(int n1,int n2)348*74a4d8c2SCharles.Forsyth void cleanfld(int n1, int n2)	/* clean out fields n1 .. n2 inclusive */
349*74a4d8c2SCharles.Forsyth {				/* nvals remain intact */
350*74a4d8c2SCharles.Forsyth 	Cell *p;
351*74a4d8c2SCharles.Forsyth 	int i;
352*74a4d8c2SCharles.Forsyth 
353*74a4d8c2SCharles.Forsyth 	for (i = n1; i <= n2; i++) {
354*74a4d8c2SCharles.Forsyth 		p = fldtab[i];
355*74a4d8c2SCharles.Forsyth 		if (freeable(p))
356*74a4d8c2SCharles.Forsyth 			xfree(p->sval);
357*74a4d8c2SCharles.Forsyth 		p->sval = "";
358*74a4d8c2SCharles.Forsyth 		p->tval = FLD | STR | DONTFREE;
359*74a4d8c2SCharles.Forsyth 	}
360*74a4d8c2SCharles.Forsyth }
361*74a4d8c2SCharles.Forsyth 
newfld(int n)362*74a4d8c2SCharles.Forsyth void newfld(int n)	/* add field n after end of existing lastfld */
363*74a4d8c2SCharles.Forsyth {
364*74a4d8c2SCharles.Forsyth 	if (n > nfields)
365*74a4d8c2SCharles.Forsyth 		growfldtab(n);
366*74a4d8c2SCharles.Forsyth 	cleanfld(lastfld+1, n);
367*74a4d8c2SCharles.Forsyth 	lastfld = n;
368*74a4d8c2SCharles.Forsyth 	setfval(nfloc, (Awkfloat) n);
369*74a4d8c2SCharles.Forsyth }
370*74a4d8c2SCharles.Forsyth 
fieldadr(int n)371*74a4d8c2SCharles.Forsyth Cell *fieldadr(int n)	/* get nth field */
372*74a4d8c2SCharles.Forsyth {
373*74a4d8c2SCharles.Forsyth 	if (n < 0)
374*74a4d8c2SCharles.Forsyth 		FATAL("trying to access field %d", n);
375*74a4d8c2SCharles.Forsyth 	if (n > nfields)	/* fields after NF are empty */
376*74a4d8c2SCharles.Forsyth 		growfldtab(n);	/* but does not increase NF */
377*74a4d8c2SCharles.Forsyth 	return(fldtab[n]);
378*74a4d8c2SCharles.Forsyth }
379*74a4d8c2SCharles.Forsyth 
growfldtab(int n)380*74a4d8c2SCharles.Forsyth void growfldtab(int n)	/* make new fields up to at least $n */
381*74a4d8c2SCharles.Forsyth {
382*74a4d8c2SCharles.Forsyth 	int nf = 2 * nfields;
383*74a4d8c2SCharles.Forsyth 
384*74a4d8c2SCharles.Forsyth 	if (n > nf)
385*74a4d8c2SCharles.Forsyth 		nf = n;
386*74a4d8c2SCharles.Forsyth 	fldtab = (Cell **) realloc(fldtab, (nf+1) * (sizeof (struct Cell *)));
387*74a4d8c2SCharles.Forsyth 	if (fldtab == NULL)
388*74a4d8c2SCharles.Forsyth 		FATAL("out of space creating %d fields", nf);
389*74a4d8c2SCharles.Forsyth 	makefields(nfields+1, nf);
390*74a4d8c2SCharles.Forsyth 	nfields = nf;
391*74a4d8c2SCharles.Forsyth }
392*74a4d8c2SCharles.Forsyth 
refldbld(char * rec,char * fs)393*74a4d8c2SCharles.Forsyth int refldbld(char *rec, char *fs)	/* build fields from reg expr in FS */
394*74a4d8c2SCharles.Forsyth {
395*74a4d8c2SCharles.Forsyth 	/* this relies on having fields[] the same length as $0 */
396*74a4d8c2SCharles.Forsyth 	/* the fields are all stored in this one array with \0's */
397*74a4d8c2SCharles.Forsyth 	char *fr;
398*74a4d8c2SCharles.Forsyth 	int i, tempstat, n;
399*74a4d8c2SCharles.Forsyth 	fa *pfa;
400*74a4d8c2SCharles.Forsyth 
401*74a4d8c2SCharles.Forsyth 	n = strlen(rec);
402*74a4d8c2SCharles.Forsyth 	if (n > fieldssize) {
403*74a4d8c2SCharles.Forsyth 		xfree(fields);
404*74a4d8c2SCharles.Forsyth 		if ((fields = (char *) malloc(n+1)) == NULL)
405*74a4d8c2SCharles.Forsyth 			FATAL("out of space for fields in refldbld %d", n);
406*74a4d8c2SCharles.Forsyth 		fieldssize = n;
407*74a4d8c2SCharles.Forsyth 	}
408*74a4d8c2SCharles.Forsyth 	fr = fields;
409*74a4d8c2SCharles.Forsyth 	*fr = '\0';
410*74a4d8c2SCharles.Forsyth 	if (*rec == '\0')
411*74a4d8c2SCharles.Forsyth 		return 0;
412*74a4d8c2SCharles.Forsyth 	pfa = makedfa(fs, 1);
413*74a4d8c2SCharles.Forsyth 	   dprintf( ("into refldbld, rec = <%s>, pat = <%s>\n", rec, fs) );
414*74a4d8c2SCharles.Forsyth 	tempstat = pfa->initstat;
415*74a4d8c2SCharles.Forsyth 	for (i = 1; ; i++) {
416*74a4d8c2SCharles.Forsyth 		if (i > nfields)
417*74a4d8c2SCharles.Forsyth 			growfldtab(i);
418*74a4d8c2SCharles.Forsyth 		if (freeable(fldtab[i]))
419*74a4d8c2SCharles.Forsyth 			xfree(fldtab[i]->sval);
420*74a4d8c2SCharles.Forsyth 		fldtab[i]->tval = FLD | STR | DONTFREE;
421*74a4d8c2SCharles.Forsyth 		fldtab[i]->sval = fr;
422*74a4d8c2SCharles.Forsyth 		   dprintf( ("refldbld: i=%d\n", i) );
423*74a4d8c2SCharles.Forsyth 		if (nematch(pfa, rec)) {
424*74a4d8c2SCharles.Forsyth 			pfa->initstat = 2;	/* horrible coupling to b.c */
425*74a4d8c2SCharles.Forsyth 			   dprintf( ("match %s (%d chars)\n", patbeg, patlen) );
426*74a4d8c2SCharles.Forsyth 			strncpy(fr, rec, patbeg-rec);
427*74a4d8c2SCharles.Forsyth 			fr += patbeg - rec + 1;
428*74a4d8c2SCharles.Forsyth 			*(fr-1) = '\0';
429*74a4d8c2SCharles.Forsyth 			rec = patbeg + patlen;
430*74a4d8c2SCharles.Forsyth 		} else {
431*74a4d8c2SCharles.Forsyth 			   dprintf( ("no match %s\n", rec) );
432*74a4d8c2SCharles.Forsyth 			strcpy(fr, rec);
433*74a4d8c2SCharles.Forsyth 			pfa->initstat = tempstat;
434*74a4d8c2SCharles.Forsyth 			break;
435*74a4d8c2SCharles.Forsyth 		}
436*74a4d8c2SCharles.Forsyth 	}
437*74a4d8c2SCharles.Forsyth 	return i;
438*74a4d8c2SCharles.Forsyth }
439*74a4d8c2SCharles.Forsyth 
recbld(void)440*74a4d8c2SCharles.Forsyth void recbld(void)	/* create $0 from $1..$NF if necessary */
441*74a4d8c2SCharles.Forsyth {
442*74a4d8c2SCharles.Forsyth 	int i;
443*74a4d8c2SCharles.Forsyth 	char *r, *p;
444*74a4d8c2SCharles.Forsyth 
445*74a4d8c2SCharles.Forsyth 	if (donerec == 1)
446*74a4d8c2SCharles.Forsyth 		return;
447*74a4d8c2SCharles.Forsyth 	r = record;
448*74a4d8c2SCharles.Forsyth 	for (i = 1; i <= *NF; i++) {
449*74a4d8c2SCharles.Forsyth 		p = getsval(fldtab[i]);
450*74a4d8c2SCharles.Forsyth 		if (!adjbuf(&record, &recsize, 1+strlen(p)+r-record, recsize, &r, "recbld 1"))
451*74a4d8c2SCharles.Forsyth 			FATAL("created $0 `%.30s...' too long", record);
452*74a4d8c2SCharles.Forsyth 		while ((*r = *p++) != 0)
453*74a4d8c2SCharles.Forsyth 			r++;
454*74a4d8c2SCharles.Forsyth 		if (i < *NF) {
455*74a4d8c2SCharles.Forsyth 			if (!adjbuf(&record, &recsize, 2+strlen(*OFS)+r-record, recsize, &r, "recbld 2"))
456*74a4d8c2SCharles.Forsyth 				FATAL("created $0 `%.30s...' too long", record);
457*74a4d8c2SCharles.Forsyth 			for (p = *OFS; (*r = *p++) != 0; )
458*74a4d8c2SCharles.Forsyth 				r++;
459*74a4d8c2SCharles.Forsyth 		}
460*74a4d8c2SCharles.Forsyth 	}
461*74a4d8c2SCharles.Forsyth 	if (!adjbuf(&record, &recsize, 2+r-record, recsize, &r, "recbld 3"))
462*74a4d8c2SCharles.Forsyth 		FATAL("built giant record `%.30s...'", record);
463*74a4d8c2SCharles.Forsyth 	*r = '\0';
464*74a4d8c2SCharles.Forsyth 	   dprintf( ("in recbld inputFS=%s, fldtab[0]=%p\n", inputFS, fldtab[0]) );
465*74a4d8c2SCharles.Forsyth 
466*74a4d8c2SCharles.Forsyth 	if (freeable(fldtab[0]))
467*74a4d8c2SCharles.Forsyth 		xfree(fldtab[0]->sval);
468*74a4d8c2SCharles.Forsyth 	fldtab[0]->tval = REC | STR | DONTFREE;
469*74a4d8c2SCharles.Forsyth 	fldtab[0]->sval = record;
470*74a4d8c2SCharles.Forsyth 
471*74a4d8c2SCharles.Forsyth 	   dprintf( ("in recbld inputFS=%s, fldtab[0]=%p\n", inputFS, fldtab[0]) );
472*74a4d8c2SCharles.Forsyth 	   dprintf( ("recbld = |%s|\n", record) );
473*74a4d8c2SCharles.Forsyth 	donerec = 1;
474*74a4d8c2SCharles.Forsyth }
475*74a4d8c2SCharles.Forsyth 
476*74a4d8c2SCharles.Forsyth int	errorflag	= 0;
477*74a4d8c2SCharles.Forsyth 
yyerror(char * s)478*74a4d8c2SCharles.Forsyth void yyerror(char *s)
479*74a4d8c2SCharles.Forsyth {
480*74a4d8c2SCharles.Forsyth 	SYNTAX(s);
481*74a4d8c2SCharles.Forsyth }
482*74a4d8c2SCharles.Forsyth 
SYNTAX(char * fmt,...)483*74a4d8c2SCharles.Forsyth void SYNTAX(char *fmt, ...)
484*74a4d8c2SCharles.Forsyth {
485*74a4d8c2SCharles.Forsyth 	extern char *cmdname, *curfname;
486*74a4d8c2SCharles.Forsyth 	static int been_here = 0;
487*74a4d8c2SCharles.Forsyth 	va_list varg;
488*74a4d8c2SCharles.Forsyth 
489*74a4d8c2SCharles.Forsyth 	if (been_here++ > 2)
490*74a4d8c2SCharles.Forsyth 		return;
491*74a4d8c2SCharles.Forsyth 	fprintf(stderr, "%s: ", cmdname);
492*74a4d8c2SCharles.Forsyth 	va_start(varg, fmt);
493*74a4d8c2SCharles.Forsyth 	vfprintf(stderr, fmt, varg);
494*74a4d8c2SCharles.Forsyth 	va_end(varg);
495*74a4d8c2SCharles.Forsyth 	fprintf(stderr, " at source line %d", lineno);
496*74a4d8c2SCharles.Forsyth 	if (curfname != NULL)
497*74a4d8c2SCharles.Forsyth 		fprintf(stderr, " in function %s", curfname);
498*74a4d8c2SCharles.Forsyth 	if (compile_time == 1 && cursource() != NULL)
499*74a4d8c2SCharles.Forsyth 		fprintf(stderr, " source file %s", cursource());
500*74a4d8c2SCharles.Forsyth 	fprintf(stderr, "\n");
501*74a4d8c2SCharles.Forsyth 	errorflag = 2;
502*74a4d8c2SCharles.Forsyth 	eprint();
503*74a4d8c2SCharles.Forsyth }
504*74a4d8c2SCharles.Forsyth 
fpecatch(int n)505*74a4d8c2SCharles.Forsyth void fpecatch(int n)
506*74a4d8c2SCharles.Forsyth {
507*74a4d8c2SCharles.Forsyth 	FATAL("floating point exception %d", n);
508*74a4d8c2SCharles.Forsyth }
509*74a4d8c2SCharles.Forsyth 
510*74a4d8c2SCharles.Forsyth extern int bracecnt, brackcnt, parencnt;
511*74a4d8c2SCharles.Forsyth 
bracecheck(void)512*74a4d8c2SCharles.Forsyth void bracecheck(void)
513*74a4d8c2SCharles.Forsyth {
514*74a4d8c2SCharles.Forsyth 	int c;
515*74a4d8c2SCharles.Forsyth 	static int beenhere = 0;
516*74a4d8c2SCharles.Forsyth 
517*74a4d8c2SCharles.Forsyth 	if (beenhere++)
518*74a4d8c2SCharles.Forsyth 		return;
519*74a4d8c2SCharles.Forsyth 	while ((c = input()) != EOF && c != '\0')
520*74a4d8c2SCharles.Forsyth 		bclass(c);
521*74a4d8c2SCharles.Forsyth 	bcheck2(bracecnt, '{', '}');
522*74a4d8c2SCharles.Forsyth 	bcheck2(brackcnt, '[', ']');
523*74a4d8c2SCharles.Forsyth 	bcheck2(parencnt, '(', ')');
524*74a4d8c2SCharles.Forsyth }
525*74a4d8c2SCharles.Forsyth 
bcheck2(int n,int c1,int c2)526*74a4d8c2SCharles.Forsyth void bcheck2(int n, int c1, int c2)
527*74a4d8c2SCharles.Forsyth {
528*74a4d8c2SCharles.Forsyth 	if (n == 1)
529*74a4d8c2SCharles.Forsyth 		fprintf(stderr, "\tmissing %c\n", c2);
530*74a4d8c2SCharles.Forsyth 	else if (n > 1)
531*74a4d8c2SCharles.Forsyth 		fprintf(stderr, "\t%d missing %c's\n", n, c2);
532*74a4d8c2SCharles.Forsyth 	else if (n == -1)
533*74a4d8c2SCharles.Forsyth 		fprintf(stderr, "\textra %c\n", c2);
534*74a4d8c2SCharles.Forsyth 	else if (n < -1)
535*74a4d8c2SCharles.Forsyth 		fprintf(stderr, "\t%d extra %c's\n", -n, c2);
536*74a4d8c2SCharles.Forsyth }
537*74a4d8c2SCharles.Forsyth 
FATAL(char * fmt,...)538*74a4d8c2SCharles.Forsyth void FATAL(char *fmt, ...)
539*74a4d8c2SCharles.Forsyth {
540*74a4d8c2SCharles.Forsyth 	extern char *cmdname;
541*74a4d8c2SCharles.Forsyth 	va_list varg;
542*74a4d8c2SCharles.Forsyth 
543*74a4d8c2SCharles.Forsyth 	fflush(stdout);
544*74a4d8c2SCharles.Forsyth 	fprintf(stderr, "%s: ", cmdname);
545*74a4d8c2SCharles.Forsyth 	va_start(varg, fmt);
546*74a4d8c2SCharles.Forsyth 	vfprintf(stderr, fmt, varg);
547*74a4d8c2SCharles.Forsyth 	va_end(varg);
548*74a4d8c2SCharles.Forsyth 	error();
549*74a4d8c2SCharles.Forsyth 	if (dbg > 1)		/* core dump if serious debugging on */
550*74a4d8c2SCharles.Forsyth 		abort();
551*74a4d8c2SCharles.Forsyth 	exit(2);
552*74a4d8c2SCharles.Forsyth }
553*74a4d8c2SCharles.Forsyth 
WARNING(char * fmt,...)554*74a4d8c2SCharles.Forsyth void WARNING(char *fmt, ...)
555*74a4d8c2SCharles.Forsyth {
556*74a4d8c2SCharles.Forsyth 	extern char *cmdname;
557*74a4d8c2SCharles.Forsyth 	va_list varg;
558*74a4d8c2SCharles.Forsyth 
559*74a4d8c2SCharles.Forsyth 	fflush(stdout);
560*74a4d8c2SCharles.Forsyth 	fprintf(stderr, "%s: ", cmdname);
561*74a4d8c2SCharles.Forsyth 	va_start(varg, fmt);
562*74a4d8c2SCharles.Forsyth 	vfprintf(stderr, fmt, varg);
563*74a4d8c2SCharles.Forsyth 	va_end(varg);
564*74a4d8c2SCharles.Forsyth 	error();
565*74a4d8c2SCharles.Forsyth }
566*74a4d8c2SCharles.Forsyth 
error()567*74a4d8c2SCharles.Forsyth void error()
568*74a4d8c2SCharles.Forsyth {
569*74a4d8c2SCharles.Forsyth 	extern Node *curnode;
570*74a4d8c2SCharles.Forsyth 
571*74a4d8c2SCharles.Forsyth 	fprintf(stderr, "\n");
572*74a4d8c2SCharles.Forsyth 	if (compile_time != 2 && NR && *NR > 0) {
573*74a4d8c2SCharles.Forsyth 		fprintf(stderr, " input record number %d", (int) (*FNR));
574*74a4d8c2SCharles.Forsyth 		if (strcmp(*FILENAME, "-") != 0)
575*74a4d8c2SCharles.Forsyth 			fprintf(stderr, ", file %s", *FILENAME);
576*74a4d8c2SCharles.Forsyth 		fprintf(stderr, "\n");
577*74a4d8c2SCharles.Forsyth 	}
578*74a4d8c2SCharles.Forsyth 	if (compile_time != 2 && curnode)
579*74a4d8c2SCharles.Forsyth 		fprintf(stderr, " source line number %d", curnode->lineno);
580*74a4d8c2SCharles.Forsyth 	else if (compile_time != 2 && lineno)
581*74a4d8c2SCharles.Forsyth 		fprintf(stderr, " source line number %d", lineno);
582*74a4d8c2SCharles.Forsyth 	if (compile_time == 1 && cursource() != NULL)
583*74a4d8c2SCharles.Forsyth 		fprintf(stderr, " source file %s", cursource());
584*74a4d8c2SCharles.Forsyth 	fprintf(stderr, "\n");
585*74a4d8c2SCharles.Forsyth 	eprint();
586*74a4d8c2SCharles.Forsyth }
587*74a4d8c2SCharles.Forsyth 
eprint(void)588*74a4d8c2SCharles.Forsyth void eprint(void)	/* try to print context around error */
589*74a4d8c2SCharles.Forsyth {
590*74a4d8c2SCharles.Forsyth 	char *p, *q;
591*74a4d8c2SCharles.Forsyth 	int c;
592*74a4d8c2SCharles.Forsyth 	static int been_here = 0;
593*74a4d8c2SCharles.Forsyth 	extern char ebuf[], *ep;
594*74a4d8c2SCharles.Forsyth 
595*74a4d8c2SCharles.Forsyth 	if (compile_time == 2 || compile_time == 0 || been_here++ > 0)
596*74a4d8c2SCharles.Forsyth 		return;
597*74a4d8c2SCharles.Forsyth 	p = ep - 1;
598*74a4d8c2SCharles.Forsyth 	if (p > ebuf && *p == '\n')
599*74a4d8c2SCharles.Forsyth 		p--;
600*74a4d8c2SCharles.Forsyth 	for ( ; p > ebuf && *p != '\n' && *p != '\0'; p--)
601*74a4d8c2SCharles.Forsyth 		;
602*74a4d8c2SCharles.Forsyth 	while (*p == '\n')
603*74a4d8c2SCharles.Forsyth 		p++;
604*74a4d8c2SCharles.Forsyth 	fprintf(stderr, " context is\n\t");
605*74a4d8c2SCharles.Forsyth 	for (q=ep-1; q>=p && *q!=' ' && *q!='\t' && *q!='\n'; q--)
606*74a4d8c2SCharles.Forsyth 		;
607*74a4d8c2SCharles.Forsyth 	for ( ; p < q; p++)
608*74a4d8c2SCharles.Forsyth 		if (*p)
609*74a4d8c2SCharles.Forsyth 			putc(*p, stderr);
610*74a4d8c2SCharles.Forsyth 	fprintf(stderr, " >>> ");
611*74a4d8c2SCharles.Forsyth 	for ( ; p < ep; p++)
612*74a4d8c2SCharles.Forsyth 		if (*p)
613*74a4d8c2SCharles.Forsyth 			putc(*p, stderr);
614*74a4d8c2SCharles.Forsyth 	fprintf(stderr, " <<< ");
615*74a4d8c2SCharles.Forsyth 	if (*ep)
616*74a4d8c2SCharles.Forsyth 		while ((c = input()) != '\n' && c != '\0' && c != EOF) {
617*74a4d8c2SCharles.Forsyth 			putc(c, stderr);
618*74a4d8c2SCharles.Forsyth 			bclass(c);
619*74a4d8c2SCharles.Forsyth 		}
620*74a4d8c2SCharles.Forsyth 	putc('\n', stderr);
621*74a4d8c2SCharles.Forsyth 	ep = ebuf;
622*74a4d8c2SCharles.Forsyth }
623*74a4d8c2SCharles.Forsyth 
bclass(int c)624*74a4d8c2SCharles.Forsyth void bclass(int c)
625*74a4d8c2SCharles.Forsyth {
626*74a4d8c2SCharles.Forsyth 	switch (c) {
627*74a4d8c2SCharles.Forsyth 	case '{': bracecnt++; break;
628*74a4d8c2SCharles.Forsyth 	case '}': bracecnt--; break;
629*74a4d8c2SCharles.Forsyth 	case '[': brackcnt++; break;
630*74a4d8c2SCharles.Forsyth 	case ']': brackcnt--; break;
631*74a4d8c2SCharles.Forsyth 	case '(': parencnt++; break;
632*74a4d8c2SCharles.Forsyth 	case ')': parencnt--; break;
633*74a4d8c2SCharles.Forsyth 	}
634*74a4d8c2SCharles.Forsyth }
635*74a4d8c2SCharles.Forsyth 
errcheck(double x,char * s)636*74a4d8c2SCharles.Forsyth double errcheck(double x, char *s)
637*74a4d8c2SCharles.Forsyth {
638*74a4d8c2SCharles.Forsyth 
639*74a4d8c2SCharles.Forsyth 	if (errno == EDOM) {
640*74a4d8c2SCharles.Forsyth 		errno = 0;
641*74a4d8c2SCharles.Forsyth 		WARNING("%s argument out of domain", s);
642*74a4d8c2SCharles.Forsyth 		x = 1;
643*74a4d8c2SCharles.Forsyth 	} else if (errno == ERANGE) {
644*74a4d8c2SCharles.Forsyth 		errno = 0;
645*74a4d8c2SCharles.Forsyth 		WARNING("%s result out of range", s);
646*74a4d8c2SCharles.Forsyth 		x = 1;
647*74a4d8c2SCharles.Forsyth 	}
648*74a4d8c2SCharles.Forsyth 	return x;
649*74a4d8c2SCharles.Forsyth }
650*74a4d8c2SCharles.Forsyth 
isclvar(char * s)651*74a4d8c2SCharles.Forsyth int isclvar(char *s)	/* is s of form var=something ? */
652*74a4d8c2SCharles.Forsyth {
653*74a4d8c2SCharles.Forsyth 	char *os = s;
654*74a4d8c2SCharles.Forsyth 
655*74a4d8c2SCharles.Forsyth 	if (!isalpha((uschar) *s) && *s != '_')
656*74a4d8c2SCharles.Forsyth 		return 0;
657*74a4d8c2SCharles.Forsyth 	for ( ; *s; s++)
658*74a4d8c2SCharles.Forsyth 		if (!(isalnum((uschar) *s) || *s == '_'))
659*74a4d8c2SCharles.Forsyth 			break;
660*74a4d8c2SCharles.Forsyth 	return *s == '=' && s > os && *(s+1) != '=';
661*74a4d8c2SCharles.Forsyth }
662*74a4d8c2SCharles.Forsyth 
663*74a4d8c2SCharles.Forsyth /* strtod is supposed to be a proper test of what's a valid number */
664*74a4d8c2SCharles.Forsyth /* appears to be broken in gcc on linux: thinks 0x123 is a valid FP number */
665*74a4d8c2SCharles.Forsyth /* wrong: violates 4.10.1.4 of ansi C standard */
666*74a4d8c2SCharles.Forsyth 
667*74a4d8c2SCharles.Forsyth #include <math.h>
is_number(char * s)668*74a4d8c2SCharles.Forsyth int is_number(char *s)
669*74a4d8c2SCharles.Forsyth {
670*74a4d8c2SCharles.Forsyth 	double r;
671*74a4d8c2SCharles.Forsyth 	char *ep;
672*74a4d8c2SCharles.Forsyth 	errno = 0;
673*74a4d8c2SCharles.Forsyth 	r = strtod(s, &ep);
674*74a4d8c2SCharles.Forsyth 	if (ep == s || r == HUGE_VAL || errno == ERANGE)
675*74a4d8c2SCharles.Forsyth 		return 0;
676*74a4d8c2SCharles.Forsyth 	while (*ep == ' ' || *ep == '\t' || *ep == '\n')
677*74a4d8c2SCharles.Forsyth 		ep++;
678*74a4d8c2SCharles.Forsyth 	if (*ep == '\0')
679*74a4d8c2SCharles.Forsyth 		return 1;
680*74a4d8c2SCharles.Forsyth 	else
681*74a4d8c2SCharles.Forsyth 		return 0;
682*74a4d8c2SCharles.Forsyth }
683