Add new stringlist files.

2 files changed, 216 insertions, 0 deletions

diff --git a/man/rc_stringlist.3 b/man/rc_stringlist.3
new file mode 100644
index 00000000..ca5019b8
--- /dev/null
+++ b/man/rc_stringlist.3
@@ -0,0 +1,88 @@
+.\" Copyright 2007-2008 Roy Marples
+.\" 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.
+.\"
+.\" 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.
+.\"
+.Dd Mar 16, 2008
+.Dt RC_STRLIST 3 SMM
+.Os OpenRC
+.Sh NAME
+.Nm rc_stringlist_add , rc_stringlist_addu , rc_stringlist_delete ,
+.Nm rc_stringlist_free , rc_stringlist_new , rc_stringlist_sort
+.Nd RC string list functions
+.Sh LIBRARY
+Run Command library (librc, -lrc)
+.Sh SYNOPSIS
+.In rc.h
+.Ft "RC_STRINGLIST *" Fn rc_stringlist_new void 
+.Ft "RC_STRING *" Fn rc_stringlist_add "RC_STRINGLIST *list" "const char *item"
+.Ft "RC_STRING *" Fn rc_stringlist_addu "RC_STRINGLIST *list" "const char *item"
+.Ft bool Fn rc_stringlist_delete RC_STRINGLIST "const char *item"
+.Ft void Fn rc_stringlist_free "RC_STRINGLIST *list"
+.Ft void Fn rc_stringlist_sort "RC_STRINGLIST *list"
+.Sh DESCRIPTION
+These functions provide an easy means of manipulating string lists. They are
+basically wrappers around TAILQ macros found in
+.Xr queue 3 .
+.Pp
+.Fn rc_stringlist_new
+creates a new list head to store the list.
+.Pp
+.Fn rc_stringlist_add
+adds a malloced copy of
+.Fa item
+to
+.Fa list .
+It returns a pointer to the new item on success, or NULL on failure and sets
+.Va errno
+accordingly.
+.Fn rc_stringlist_addu
+only works if
+.Fa list
+does not already contain
+.Fa item .
+.Pp
+.Fn rc_stringlist_delete
+removes and frees
+.Fa item
+from
+.Fa list ,
+retuning true on success, otherwise false.
+.Pp
+.Fn rc_stringlist_sort
+sorts the
+.Fa list
+according to C locale.
+.Pp
+.Fn rc_stringlist_free
+frees each item on
+.Fa list
+and the
+.Fa list
+itself.
+.Sh SEE ALSO
+.Xr malloc 3 ,
+.Xr free 3 ,
+.Xr queue 3 ,
+.Xr strcmp 3
+.Sh AUTHORS
+.An "Roy Marples" Aq roy@marples.name
diff --git a/src/librc/librc-stringlist.c b/src/librc/librc-stringlist.c
new file mode 100644
index 00000000..93297ce9
--- /dev/null
+++ b/src/librc/librc-stringlist.c
@@ -0,0 +1,128 @@
+/*
+   librc-strlist.h
+   String list functions to make using queue(3) a little easier.
+   */
+
+/*
+ * Copyright 2007-2008 Roy Marples
+ * 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.
+ *
+ * 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.
+ */
+
+#include "librc.h"
+
+RC_STRINGLIST *rc_stringlist_new(void)
+{
+	RC_STRINGLIST *l = xmalloc(sizeof(*l));
+	TAILQ_INIT(l);
+	return l;
+}
+
+RC_STRING *rc_stringlist_add (RC_STRINGLIST *list, const char *value)
+{
+	RC_STRING *s = xmalloc(sizeof(*s));
+
+	s->value = xstrdup(value);
+	TAILQ_INSERT_TAIL(list, s, entries);
+	return s;
+}
+librc_hidden_def(rc_stringlist_add)
+
+RC_STRING *rc_stringlist_addu (RC_STRINGLIST *list, const char *value)
+{
+	RC_STRING *s;
+
+	TAILQ_FOREACH(s, list, entries)
+		if (strcmp(s->value, value) == 0) {
+			errno = EEXIST;
+			return NULL;
+		}
+
+	return rc_stringlist_add(list, value);
+}
+librc_hidden_def(rc_stringlist_addu)
+
+bool rc_stringlist_delete (RC_STRINGLIST *list, const char *value)
+{
+	RC_STRING *s;
+
+	TAILQ_FOREACH(s, list, entries)
+		if (strcmp(s->value, value) == 0) {
+			TAILQ_REMOVE(list, s, entries);
+			free (s->value);
+			free (s);
+			return true;
+		}
+
+	errno = EEXIST;
+	return false;
+}
+librc_hidden_def(rc_stringlist_delete)
+
+void rc_stringlist_sort(RC_STRINGLIST **list)
+{
+	RC_STRINGLIST *l = *list;
+	RC_STRINGLIST *new = rc_stringlist_new();
+	RC_STRING *s;
+	RC_STRING *sn;
+	RC_STRING *n;
+	RC_STRING *last;
+
+	TAILQ_FOREACH_SAFE(s, l, entries, sn) {
+		TAILQ_REMOVE(l, s, entries);
+		last = NULL;
+		TAILQ_FOREACH (n, new, entries) {
+			if (strcmp (s->value, n->value) < 0)
+				break;
+			last = n;
+		}
+		if (last)
+			TAILQ_INSERT_AFTER(new, last, s, entries);
+		else
+			TAILQ_INSERT_HEAD(new, s, entries);
+	}
+
+	/* Now we've sorted the list, copy across the new head */
+	free(l);
+	*list = new;
+}
+librc_hidden_def(rc_stringlist_sort)
+
+void rc_stringlist_free(RC_STRINGLIST *list)
+{
+	RC_STRING *s1; 
+	RC_STRING *s2;
+
+	if (!list)
+		return;
+
+	s1 = TAILQ_FIRST(list);
+	while (s1) {
+		s2 = TAILQ_NEXT(s1, entries);
+		free(s1->value);
+		free(s1);
+		s1 = s2;
+	}
+	free(list);
+}
+librc_hidden_def(rc_stringlist_free)