1 files changed, 99 insertions, 0 deletions
diff --git a/contrib/global/lib/tab.c b/contrib/global/lib/tab.c
new file mode 100644
index 0000000..8f5adbf
--- /dev/null
+++ b/contrib/global/lib/tab.c
@@ -0,0 +1,99 @@
+/*
+ * Copyright (c) 1996, 1997 Shigio Yamaguchi. 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 Shigio Yamaguchi.
+ * 4. Neither the name of the author nor the names of any co-contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+ *
+ *	tab.c					20-Oct-97
+ *
+ */
+#include <stdio.h>
+
+#define TABPOS(i)	((i)%8 == 0)
+/*
+ * detab: convert tabs into spaces and print
+ *
+ *	i)	op	FILE *
+ *	i)	buf	string including tabs
+ */
+void
+detab(op, buf)
+FILE	*op;
+char	*buf;
+{
+	int	src, dst;
+	char	c;
+
+	src = dst = 0;
+	while ((c = buf[src++]) != 0) {
+		if (c == '\t') {
+			do {
+				(void)putc(' ', op);
+				dst++;
+			} while (!TABPOS(dst));
+		} else {
+			(void)putc(c, op);
+			dst++;
+		}
+	}
+	(void)putc('\n', op);
+}
+/*
+ * entab: convert spaces into tabs
+ *
+ *	io)	buf	string buffer
+ */
+void
+entab(buf)
+char	*buf;
+{
+	int	blanks = 0;
+	int	pos, src, dst;
+	char	c;
+
+	pos = src = dst = 0;
+	while ((c = buf[src++]) != 0) {
+		if (c == ' ') {
+			if (!TABPOS(++pos)) {
+				blanks++;		/* count blanks */
+				continue;
+			}
+			buf[dst++] = '\t';
+		} else if (c == '\t') {
+			while (!TABPOS(++pos))
+				;
+			buf[dst++] = '\t';
+		} else {
+			++pos;
+			while (blanks--)
+				buf[dst++] = ' ';
+			buf[dst++] = c;
+		}
+		blanks = 0;
+	}
+	buf[dst] = 0;
+}