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Diffstat (limited to 'usr.bin/unexpand/unexpand.c')
-rw-r--r--usr.bin/unexpand/unexpand.c141
1 files changed, 141 insertions, 0 deletions
diff --git a/usr.bin/unexpand/unexpand.c b/usr.bin/unexpand/unexpand.c
new file mode 100644
index 00000000000..681aaf235f1
--- /dev/null
+++ b/usr.bin/unexpand/unexpand.c
@@ -0,0 +1,141 @@
+/* $NetBSD: unexpand.c,v 1.5 1994/12/24 17:08:05 cgd Exp $ */
+
+/*-
+ * Copyright (c) 1980, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char copyright[] =
+"@(#) Copyright (c) 1980, 1993\n\
+ The Regents of the University of California. All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)unexpand.c 8.1 (Berkeley) 6/6/93";
+#endif
+static char rcsid[] = "$NetBSD: unexpand.c,v 1.5 1994/12/24 17:08:05 cgd Exp $";
+#endif /* not lint */
+
+/*
+ * unexpand - put tabs into a file replacing blanks
+ */
+#include <stdio.h>
+#include <string.h>
+
+char genbuf[BUFSIZ];
+char linebuf[BUFSIZ];
+int all;
+
+void tabify __P((char));
+
+int
+main(argc, argv)
+ int argc;
+ char *argv[];
+{
+ register char *cp;
+
+ argc--, argv++;
+ if (argc > 0 && argv[0][0] == '-') {
+ if (strcmp(argv[0], "-a") != 0) {
+ fprintf(stderr, "usage: unexpand [ -a ] file ...\n");
+ exit(1);
+ }
+ all++;
+ argc--, argv++;
+ }
+ do {
+ if (argc > 0) {
+ if (freopen(argv[0], "r", stdin) == NULL) {
+ perror(argv[0]);
+ exit(1);
+ }
+ argc--, argv++;
+ }
+ while (fgets(genbuf, BUFSIZ, stdin) != NULL) {
+ for (cp = linebuf; *cp; cp++)
+ continue;
+ if (cp > linebuf)
+ cp[-1] = 0;
+ tabify(all);
+ printf("%s", linebuf);
+ }
+ } while (argc > 0);
+ exit(0);
+}
+
+void
+tabify(c)
+ char c;
+{
+ register char *cp, *dp;
+ register int dcol;
+ int ocol;
+
+ ocol = 0;
+ dcol = 0;
+ cp = genbuf, dp = linebuf;
+ for (;;) {
+ switch (*cp) {
+
+ case ' ':
+ dcol++;
+ break;
+
+ case '\t':
+ dcol += 8;
+ dcol &= ~07;
+ break;
+
+ default:
+ while (((ocol + 8) &~ 07) <= dcol) {
+ if (ocol + 1 == dcol)
+ break;
+ *dp++ = '\t';
+ ocol += 8;
+ ocol &= ~07;
+ }
+ while (ocol < dcol) {
+ *dp++ = ' ';
+ ocol++;
+ }
+ if (*cp == 0 || c == 0) {
+ strcpy(dp, cp);
+ return;
+ }
+ *dp++ = *cp;
+ ocol++, dcol++;
+ }
+ cp++;
+ }
+}