1 files changed, 153 insertions, 0 deletions
diff --git a/usr.bin/window/string.c b/usr.bin/window/string.c
new file mode 100644
index 0000000..a01f04f
--- /dev/null
+++ b/usr.bin/window/string.c
@@ -0,0 +1,153 @@
+/*
+ * Copyright (c) 1983, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Edward Wang at The University of California, Berkeley.
+ *
+ * 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 sccsid[] = "@(#)string.c	8.1 (Berkeley) 6/6/93";
+#endif /* not lint */
+
+#include "string.h"
+
+char *malloc();
+
+char *
+str_cpy(s)
+register char *s;
+{
+	char *str;
+	register char *p;
+
+	str = p = str_alloc(strlen(s) + 1);
+	if (p == 0)
+		return 0;
+	while (*p++ = *s++)
+		;
+	return str;
+}
+
+char *
+str_ncpy(s, n)
+register char *s;
+register n;
+{
+	int l = strlen(s);
+	char *str;
+	register char *p;
+
+	if (n > l)
+		n = l;
+	str = p = str_alloc(n + 1);
+	if (p == 0)
+		return 0;
+	while (--n >= 0)
+		*p++ = *s++;
+	*p = 0;
+	return str;
+}
+
+char *
+str_itoa(i)
+int i;
+{
+	char buf[30];
+
+	(void) sprintf(buf, "%d", i);
+	return str_cpy(buf);
+}
+
+char *
+str_cat(s1, s2)
+char *s1, *s2;
+{
+	char *str;
+	register char *p, *q;
+
+	str = p = str_alloc(strlen(s1) + strlen(s2) + 1);
+	if (p == 0)
+		return 0;
+	for (q = s1; *p++ = *q++;)
+		;
+	for (q = s2, p--; *p++ = *q++;)
+		;
+	return str;
+}
+
+/*
+ * match s against p.
+ * s can be a prefix of p with at least min characters.
+ */
+str_match(s, p, min)
+register char *s, *p;
+register min;
+{
+	for (; *s && *p && *s == *p; s++, p++, min--)
+		;
+	return *s == *p || *s == 0 && min <= 0;
+}
+
+#ifdef STR_DEBUG
+char *
+str_alloc(l)
+int l;
+{
+	register struct string *s;
+
+	s = (struct string *) malloc((unsigned)l + str_offset);
+	if (s == 0)
+		return 0;
+	if (str_head.s_forw == 0)
+		str_head.s_forw = str_head.s_back = &str_head;
+	s->s_forw = str_head.s_forw;
+	s->s_back = &str_head;
+	str_head.s_forw = s;
+	s->s_forw->s_back = s;
+	return s->s_data;
+}
+
+str_free(str)
+char *str;
+{
+	register struct string *s;
+
+	for (s = str_head.s_forw; s != &str_head && s->s_data != str;
+	     s = s->s_forw)
+		;
+	if (s == &str_head)
+		abort();
+	s->s_back->s_forw = s->s_forw;
+	s->s_forw->s_back = s->s_back;
+	free((char *)s);
+}
+#endif