1 files changed, 71 insertions, 0 deletions
diff --git a/counters.c b/counters.c
new file mode 100644
index 0000000..4e3036a
--- /dev/null
+++ b/counters.c
@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2010 Joel Rosdahl
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 3 of the License, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/* A simple array of unsigned integers used for the statistics counters. */
+
+#include "ccache.h"
+
+/*
+ * Allocate and initialize a struct counters. Data entries up to the size are
+ * set to 0.
+ */
+struct counters *
+counters_init(size_t initial_size)
+{
+	struct counters *c = x_malloc(sizeof(*c));
+	c->data = NULL;
+	c->size = 0;
+	c->allocated = 0;
+	counters_resize(c, initial_size);
+	return c;
+}
+
+/*
+ * Free a struct counters.
+ */
+void
+counters_free(struct counters *c)
+{
+	free(c->data);
+	free(c);
+}
+
+/*
+ * Set a new size. New data entries are set to 0.
+ */
+void
+counters_resize(struct counters *c, size_t new_size)
+{
+	if (new_size > c->size) {
+		size_t i;
+		bool realloc = false;
+
+		while (c->allocated < new_size) {
+			c->allocated += 32 + c->allocated;
+			realloc = true;
+		}
+		if (realloc) {
+			c->data = x_realloc(c->data, c->allocated * sizeof(c->data[0]));
+		}
+		for (i = c->size; i < new_size; i++) {
+			c->data[i] = 0;
+		}
+	}
+
+	c->size = new_size;
+}