234 lines
6.3 KiB
C
234 lines
6.3 KiB
C
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/* $NetBSD: lam.c,v 1.8 2011/09/04 20:28:09 joerg Exp $ */
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/*-
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* Copyright (c) 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT("@(#) Copyright (c) 1993\
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The Regents of the University of California. All rights reserved.");
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)lam.c 8.1 (Berkeley) 6/6/93";
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#endif
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__RCSID("$NetBSD: lam.c,v 1.8 2011/09/04 20:28:09 joerg Exp $");
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#endif /* not lint */
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/*
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* lam - laminate files
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* Author: John Kunze, UCB
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*/
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#include <ctype.h>
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#include <err.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#define MAXOFILES 20
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#define BIGBUFSIZ 5 * BUFSIZ
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struct openfile { /* open file structure */
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FILE *fp; /* file pointer */
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short eof; /* eof flag */
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short pad; /* pad flag for missing columns */
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char eol; /* end of line character */
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const char *sepstring; /* string to print before each line */
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const char *format; /* printf(3) style string spec. */
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} input[MAXOFILES];
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static int morefiles; /* set by getargs(), changed by gatherline() */
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static int nofinalnl; /* normally append \n to each output line */
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static char line[BIGBUFSIZ];
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static char *linep;
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__dead static void error(const char *, const char *);
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static char *gatherline(struct openfile *);
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static void getargs(char *[]);
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static char *pad(struct openfile *);
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int
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main(int argc, char *argv[])
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{
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struct openfile *ip;
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getargs(argv);
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if (!morefiles)
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error("lam - laminate files", "");
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for (;;) {
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linep = line;
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for (ip = input; ip->fp != NULL; ip++)
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linep = gatherline(ip);
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if (!morefiles)
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exit(0);
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fputs(line, stdout);
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fputs(ip->sepstring, stdout);
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if (!nofinalnl)
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putchar('\n');
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}
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}
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static void
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getargs(char *av[])
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{
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struct openfile *ip = input;
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char *p, *c;
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static char fmtbuf[BUFSIZ];
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char *fmtp = fmtbuf;
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int P, S, F, T;
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P = S = F = T = 0; /* capitalized options */
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while ((p = *++av) != NULL) {
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if (*p != '-' || !p[1]) {
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if (++morefiles >= MAXOFILES)
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errx(1, "too many input files");
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if (*p == '-')
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ip->fp = stdin;
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else if ((ip->fp = fopen(p, "r")) == NULL)
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errx(1, "open %s", p);
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ip->pad = P;
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if (!ip->sepstring)
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ip->sepstring = (S ? (ip-1)->sepstring : "");
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if (!ip->format)
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ip->format = ((P || F) ? (ip-1)->format : "%s");
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if (!ip->eol)
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ip->eol = (T ? (ip-1)->eol : '\n');
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ip++;
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continue;
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}
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c = ++p;
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switch (tolower((unsigned char) *c)) {
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case 's':
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if (*++p || (p = *++av))
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ip->sepstring = p;
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else
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error("Need string after -%s", c);
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S = (*c == 'S' ? 1 : 0);
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break;
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case 't':
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if (*++p || (p = *++av))
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ip->eol = *p;
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else
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error("Need character after -%s", c);
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T = (*c == 'T' ? 1 : 0);
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nofinalnl = 1;
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break;
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case 'p':
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ip->pad = 1;
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P = (*c == 'P' ? 1 : 0);
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/* FALLTHROUGH */
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case 'f':
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F = (*c == 'F' ? 1 : 0);
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if (*++p || (p = *++av)) {
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fmtp += strlen(fmtp) + 1;
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if (fmtp >= fmtbuf + sizeof(fmtbuf))
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errx(1, "no more format space");
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/* restrict format string to only valid width formatters */
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if (strspn(p, "-.0123456789") != strlen(p))
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errx(1, "invalid format string `%s'", p);
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if (snprintf(fmtp, fmtbuf + sizeof(fmtbuf) - fmtp, "%%%ss", p)
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>= fmtbuf + sizeof(fmtbuf) - fmtp)
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errx(1, "no more format space");
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sprintf(fmtp, "%%%ss", p);
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ip->format = fmtp;
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}
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else
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error("Need string after -%s", c);
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break;
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default:
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error("What do you mean by -%s?", c);
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break;
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}
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}
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ip->fp = NULL;
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if (!ip->sepstring)
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ip->sepstring = "";
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}
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static char *
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pad(struct openfile *ip)
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{
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char *lp = linep;
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strlcpy(lp, ip->sepstring, line + sizeof(line) - lp);
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lp += strlen(lp);
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if (ip->pad) {
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snprintf(lp, line + sizeof(line) - lp, ip->format, "");
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lp += strlen(lp);
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}
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return (lp);
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}
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static char *
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gatherline(struct openfile *ip)
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{
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char s[BUFSIZ];
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int c;
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char *p;
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char *lp = linep;
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char *end = s + sizeof(s) - 1;
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if (ip->eof)
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return (pad(ip));
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for (p = s; (c = fgetc(ip->fp)) != EOF && p < end; p++)
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if ((*p = c) == ip->eol)
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break;
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*p = '\0';
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if (c == EOF) {
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ip->eof = 1;
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if (ip->fp == stdin)
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fclose(stdin);
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morefiles--;
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return (pad(ip));
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}
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strlcpy(lp, ip->sepstring, line + sizeof(line) - lp);
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lp += strlen(lp);
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snprintf(lp, line + sizeof(line) - lp, ip->format, s);
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lp += strlen(lp);
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return (lp);
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}
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static void
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error(const char *msg, const char *s)
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{
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warnx(msg, s);
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fprintf(stderr,
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"\nUsage: lam [ -[fp] min.max ] [ -s sepstring ] [ -t c ] file ...\n");
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if (strncmp("lam - ", msg, 6) == 0)
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fprintf(stderr, "Options:\n\t%s\t%s\t%s\t%s\t%s",
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"-f min.max field widths for file fragments\n",
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"-p min.max like -f, but pad missing fragments\n",
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"-s sepstring fragment separator\n",
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"-t c input line terminator is c, no \\n after output lines\n",
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"Capitalized options affect more than one file.\n");
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exit(1);
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}
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