xref: /freebsd/usr.bin/lam/lam.c (revision 380a989b3223d455375b4fae70fd0b9bdd43bafb)
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  * 3. All advertising materials mentioning features or use of this software
14  *    must display the following acknowledgement:
15  *	This product includes software developed by the University of
16  *	California, Berkeley and its contributors.
17  * 4. Neither the name of the University nor the names of its contributors
18  *    may be used to endorse or promote products derived from this software
19  *    without specific prior written permission.
20  *
21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31  * SUCH DAMAGE.
32  */
33 
34 #ifndef lint
35 static const char copyright[] =
36 "@(#) Copyright (c) 1993\n\
37 	The Regents of the University of California.  All rights reserved.\n";
38 #endif /* not lint */
39 
40 #ifndef lint
41 #if 0
42 static char sccsid[] = "@(#)lam.c	8.1 (Berkeley) 6/6/93";
43 #endif
44 static const char rcsid[] =
45 	"$Id$";
46 #endif /* not lint */
47 
48 /*
49  *	lam - laminate files
50  *	Author:  John Kunze, UCB
51  */
52 
53 #include <err.h>
54 #include <stdio.h>
55 #include <stdlib.h>
56 #include <string.h>
57 
58 #define	MAXOFILES	20
59 #define	BIGBUFSIZ	5 * BUFSIZ
60 
61 struct	openfile {		/* open file structure */
62 	FILE	*fp;		/* file pointer */
63 	short	eof;		/* eof flag */
64 	short	pad;		/* pad flag for missing columns */
65 	char	eol;		/* end of line character */
66 	char	*sepstring;	/* string to print before each line */
67 	char	*format;	/* printf(3) style string spec. */
68 }	input[MAXOFILES];
69 
70 int	morefiles;		/* set by getargs(), changed by gatherline() */
71 int	nofinalnl;		/* normally append \n to each output line */
72 char	line[BIGBUFSIZ];
73 char	*linep;
74 
75 char	*gatherline __P((struct openfile *));
76 void	 getargs __P((char *[]));
77 char	*pad __P((struct openfile *));
78 static void usage __P((void));
79 
80 int
81 main(argc, argv)
82 	int argc;
83 	char *argv[];
84 {
85 	register struct	openfile *ip;
86 
87 	getargs(argv);
88 	if (!morefiles)
89 		usage();
90 	for (;;) {
91 		linep = line;
92 		for (ip = input; ip->fp != NULL; ip++)
93 			linep = gatherline(ip);
94 		if (!morefiles)
95 			exit(0);
96 		fputs(line, stdout);
97 		fputs(ip->sepstring, stdout);
98 		if (!nofinalnl)
99 			putchar('\n');
100 	}
101 }
102 
103 void
104 getargs(av)
105 	char *av[];
106 {
107 	register struct	openfile *ip = input;
108 	register char *p;
109 	register char *c;
110 	static char fmtbuf[BUFSIZ];
111 	char *fmtp = fmtbuf;
112 	int P, S, F, T;
113 
114 	P = S = F = T = 0;		/* capitalized options */
115 	while ((p = *++av) != NULL) {
116 		if (*p != '-' || !p[1]) {
117 			morefiles++;
118 			if (*p == '-')
119 				ip->fp = stdin;
120 			else if ((ip->fp = fopen(p, "r")) == NULL) {
121 				err(1, p);
122 			}
123 			ip->pad = P;
124 			if (!ip->sepstring)
125 				ip->sepstring = (S ? (ip-1)->sepstring : "");
126 			if (!ip->format)
127 				ip->format = ((P || F) ? (ip-1)->format : "%s");
128 			if (!ip->eol)
129 				ip->eol = (T ? (ip-1)->eol : '\n');
130 			ip++;
131 			continue;
132 		}
133 		switch (*(c = ++p) | 040) {
134 		case 's':
135 			if (*++p || (p = *++av))
136 				ip->sepstring = p;
137 			else
138 				errx(1, "need string after -%s", c);
139 			S = (*c == 'S' ? 1 : 0);
140 			break;
141 		case 't':
142 			if (*++p || (p = *++av))
143 				ip->eol = *p;
144 			else
145 				errx(1, "need character after -%s", c);
146 			T = (*c == 'T' ? 1 : 0);
147 			nofinalnl = 1;
148 			break;
149 		case 'p':
150 			ip->pad = 1;
151 			P = (*c == 'P' ? 1 : 0);
152 		case 'f':
153 			F = (*c == 'F' ? 1 : 0);
154 			if (*++p || (p = *++av)) {
155 				fmtp += strlen(fmtp) + 1;
156 				if (fmtp > fmtbuf + BUFSIZ)
157 					errx(1, "no more format space");
158 				sprintf(fmtp, "%%%ss", p);
159 				ip->format = fmtp;
160 			}
161 			else
162 				errx(1, "need string after -%s", c);
163 			break;
164 		default:
165 			errx(1, "what do you mean by -%s?", c);
166 			break;
167 		}
168 	}
169 	ip->fp = NULL;
170 	if (!ip->sepstring)
171 		ip->sepstring = "";
172 }
173 
174 char *
175 pad(ip)
176 	struct openfile *ip;
177 {
178 	register char *p = ip->sepstring;
179 	register char *lp = linep;
180 
181 	while (*p)
182 		*lp++ = *p++;
183 	if (ip->pad) {
184 		sprintf(lp, ip->format, "");
185 		lp += strlen(lp);
186 	}
187 	return (lp);
188 }
189 
190 char *
191 gatherline(ip)
192 	struct openfile *ip;
193 {
194 	char s[BUFSIZ];
195 	register int c;
196 	register char *p;
197 	register char *lp = linep;
198 	char *end = s + BUFSIZ;
199 
200 	if (ip->eof)
201 		return (pad(ip));
202 	for (p = s; (c = fgetc(ip->fp)) != EOF && p < end; p++)
203 		if ((*p = c) == ip->eol)
204 			break;
205 	*p = '\0';
206 	if (c == EOF) {
207 		ip->eof = 1;
208 		if (ip->fp == stdin)
209 			fclose(stdin);
210 		morefiles--;
211 		return (pad(ip));
212 	}
213 	p = ip->sepstring;
214 	while (*p)
215 		*lp++ = *p++;
216 	sprintf(lp, ip->format, s);
217 	lp += strlen(lp);
218 	return (lp);
219 }
220 
221 static void
222 usage()
223 {
224 	fprintf(stderr, "%s\n%s\n",
225 "usage: lam [ -f min.max ] [ -s sepstring ] [ -t c ] file ...",
226 "       lam [ -p min.max ] [ -s sepstring ] [ -t c ] file ...");
227 	exit(1);
228 }
229