1/*-
2 * Copyright (c) 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#ifndef lint
31static const char copyright[] =
32"@(#) Copyright (c) 1993\n\
33	The Regents of the University of California.  All rights reserved.\n";
34#endif /* not lint */
35
36#ifndef lint
37#if 0
38static char sccsid[] = "@(#)lam.c	8.1 (Berkeley) 6/6/93";
39#endif
40#endif /* not lint */
41#include <sys/cdefs.h>
42__FBSDID("$FreeBSD$");
43
44/*
45 *	lam - laminate files
46 *	Author:  John Kunze, UCB
47 */
48
49#include <ctype.h>
50#include <err.h>
51#include <stdio.h>
52#include <stdlib.h>
53#include <string.h>
54
55#define	MAXOFILES	20
56#define	BIGBUFSIZ	5 * BUFSIZ
57
58static struct openfile {	/* open file structure */
59	FILE	*fp;		/* file pointer */
60	short	eof;		/* eof flag */
61	short	pad;		/* pad flag for missing columns */
62	char	eol;		/* end of line character */
63	const char *sepstring;	/* string to print before each line */
64	const char *format;	/* printf(3) style string spec. */
65}	input[MAXOFILES];
66
67static int	morefiles;	/* set by getargs(), changed by gatherline() */
68static int	nofinalnl;	/* normally append \n to each output line */
69static char	line[BIGBUFSIZ];
70static char	*linep;
71
72static char    *gatherline(struct openfile *);
73static void	getargs(char *[]);
74static char    *pad(struct openfile *);
75static void	usage(void);
76
77int
78main(int argc, char *argv[])
79{
80	struct	openfile *ip;
81
82	if (argc == 1)
83		usage();
84	getargs(argv);
85	if (!morefiles)
86		usage();
87	for (;;) {
88		linep = line;
89		for (ip = input; ip->fp != NULL; ip++)
90			linep = gatherline(ip);
91		if (!morefiles)
92			exit(0);
93		fputs(line, stdout);
94		fputs(ip->sepstring, stdout);
95		if (!nofinalnl)
96			putchar('\n');
97	}
98}
99
100static void
101getargs(char *av[])
102{
103	struct	openfile *ip = input;
104	char *p, *c;
105	static char fmtbuf[BUFSIZ];
106	char *fmtp = fmtbuf;
107	int P, S, F, T;
108
109	P = S = F = T = 0;		/* capitalized options */
110	while ((p = *++av) != NULL) {
111		if (*p != '-' || !p[1]) {
112			if (++morefiles >= MAXOFILES)
113				errx(1, "too many input files");
114			if (*p == '-')
115				ip->fp = stdin;
116			else if ((ip->fp = fopen(p, "r")) == NULL) {
117				err(1, "%s", p);
118			}
119			ip->pad = P;
120			if (!ip->sepstring)
121				ip->sepstring = (S ? (ip-1)->sepstring : "");
122			if (!ip->format)
123				ip->format = ((P || F) ? (ip-1)->format : "%s");
124			if (!ip->eol)
125				ip->eol = (T ? (ip-1)->eol : '\n');
126			ip++;
127			continue;
128		}
129		c = ++p;
130		switch (tolower((unsigned char)*c)) {
131		case 's':
132			if (*++p || (p = *++av))
133				ip->sepstring = p;
134			else
135				usage();
136			S = (*c == 'S' ? 1 : 0);
137			break;
138		case 't':
139			if (*++p || (p = *++av))
140				ip->eol = *p;
141			else
142				usage();
143			T = (*c == 'T' ? 1 : 0);
144			nofinalnl = 1;
145			break;
146		case 'p':
147			ip->pad = 1;
148			P = (*c == 'P' ? 1 : 0);
149			/* FALLTHROUGH */
150		case 'f':
151			F = (*c == 'F' ? 1 : 0);
152			if (*++p || (p = *++av)) {
153				fmtp += strlen(fmtp) + 1;
154				if (fmtp >= fmtbuf + sizeof(fmtbuf))
155					errx(1, "no more format space");
156				/* restrict format string to only valid width formatters */
157				if (strspn(p, "-.0123456789") != strlen(p))
158					errx(1, "invalid format string `%s'", p);
159				if (snprintf(fmtp, fmtbuf + sizeof(fmtbuf) - fmtp, "%%%ss", p)
160				    >= fmtbuf + sizeof(fmtbuf) - fmtp)
161					errx(1, "no more format space");
162				ip->format = fmtp;
163			}
164			else
165				usage();
166			break;
167		default:
168			usage();
169		}
170	}
171	ip->fp = NULL;
172	if (!ip->sepstring)
173		ip->sepstring = "";
174}
175
176static char *
177pad(struct openfile *ip)
178{
179	char *lp = linep;
180
181	strlcpy(lp, ip->sepstring, line + sizeof(line) - lp);
182	lp += strlen(lp);
183	if (ip->pad) {
184		snprintf(lp, line + sizeof(line) - lp, ip->format, "");
185		lp += strlen(lp);
186	}
187	return (lp);
188}
189
190static char *
191gatherline(struct openfile *ip)
192{
193	char s[BUFSIZ];
194	int c;
195	char *p;
196	char *lp = linep;
197	char *end = s + sizeof(s) - 1;
198
199	if (ip->eof)
200		return (pad(ip));
201	for (p = s; (c = fgetc(ip->fp)) != EOF && p < end; p++)
202		if ((*p = c) == ip->eol)
203			break;
204	*p = '\0';
205	if (c == EOF) {
206		ip->eof = 1;
207		if (ip->fp == stdin)
208			fclose(stdin);
209		morefiles--;
210		return (pad(ip));
211	}
212	strlcpy(lp, ip->sepstring, line + sizeof(line) - lp);
213	lp += strlen(lp);
214	snprintf(lp, line + sizeof(line) - lp, ip->format, s);
215	lp += strlen(lp);
216	return (lp);
217}
218
219static void
220usage(void)
221{
222	fprintf(stderr, "%s\n%s\n",
223"usage: lam [ -f min.max ] [ -s sepstring ] [ -t c ] file ...",
224"       lam [ -p min.max ] [ -s sepstring ] [ -t c ] file ...");
225	exit(1);
226}
227