Per-session configuration options.

1 files changed, 139 insertions, 0 deletions

diff --git a/options.c b/options.c
new file mode 100644
index 00000000..69ad750c
--- /dev/null
+++ b/options.c
@@ -0,0 +1,139 @@
+/* $Id: options.c,v 1.1 2008-06-03 21:42:37 nicm Exp $ */
+
+/*
+ * Copyright (c) 2008 Nicholas Marriott <nicm@users.sourceforge.net>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
+ * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/types.h>
+
+#include <stdarg.h>
+#include <string.h>
+
+#include "tmux.h"
+
+/*
+ * Option handling; each option has a name, type and value and is stored in
+ * a splay tree.
+ */
+
+SPLAY_GENERATE(options_tree, options_entry, entry, options_cmp);
+
+int
+options_cmp(struct options_entry *o1, struct options_entry *o2)
+{
+	return (strcmp(o1->name, o2->name));
+}
+
+void
+options_init(struct options *oo, struct options *parent)
+{
+	SPLAY_INIT(&oo->tree);
+	oo->parent = parent;
+}
+
+void
+options_free(struct options *oo)
+{
+	struct options_entry	*o;
+
+	while (!SPLAY_EMPTY(&oo->tree)) {
+		o = SPLAY_ROOT(&oo->tree);
+		SPLAY_REMOVE(options_tree, &oo->tree, o);
+		xfree(o->name);
+		if (o->type == OPTIONS_STRING)
+			xfree(o->value.string);
+		xfree(o);
+	}
+}
+
+void printflike3
+options_set_string(struct options *oo, const char *name, const char *fmt, ...)
+{
+	struct options_entry	*o, p;
+	va_list			 ap;
+
+	p.name = name;
+	o = SPLAY_FIND(options_tree, &oo->tree, &p);
+	if (o == NULL) {
+		o = xmalloc(sizeof *o);
+		o->name = xstrdup(name);
+		SPLAY_INSERT(options_tree, &oo->tree, o);
+	} else if (o->type == OPTIONS_STRING)
+		xfree(o->value.string);
+
+	va_start(ap, fmt);
+	o->type = OPTIONS_STRING;
+	xvasprintf(&o->value.string, fmt, ap);
+	va_end(ap);
+}
+
+char *
+options_get_string(struct options *oo, const char *name)
+{
+	struct options_entry	*o, p;
+
+	p.name = name;
+	o = SPLAY_FIND(options_tree, &oo->tree, &p);
+	while (o == NULL) {
+		oo = oo->parent;
+		o = SPLAY_FIND(options_tree, &oo->tree, &p);
+		if (o != NULL)
+			break;
+	}
+	if (o == NULL)
+		fatalx("missing option");
+	if (o->type != OPTIONS_STRING)
+		fatalx("option not a string");
+	return (o->value.string);
+}
+
+void
+options_set_number(struct options *oo, const char *name, long long value)
+{
+	struct options_entry	*o, p;
+
+	p.name = name;
+	o = SPLAY_FIND(options_tree, &oo->tree, &p);
+	if (o == NULL) {
+		o = xmalloc(sizeof *o);
+		o->name = xstrdup(name);
+		SPLAY_INSERT(options_tree, &oo->tree, o);
+	} else if (o->type == OPTIONS_STRING)
+		xfree(o->value.string);
+
+	o->type = OPTIONS_NUMBER;
+	o->value.number = value;
+
+}
+
+int
+options_get_number(struct options *oo, const char *name)
+{
+	struct options_entry	*o, p;
+
+	p.name = name;
+	o = SPLAY_FIND(options_tree, &oo->tree, &p);
+	while (o == NULL) {
+		oo = oo->parent;
+		o = SPLAY_FIND(options_tree, &oo->tree, &p);
+		if (o != NULL)
+			break;
+	}
+	if (o == NULL)
+		fatalx("missing option");
+	if (o->type != OPTIONS_NUMBER)
+		fatalx("option not a number");
+	return (o->value.number);
+}