X-Git-Url: http://pileus.org/git/?a=blobdiff_plain;f=util.h;h=005dba623f13dcb878b34cd63331416a93896c76;hb=f0adaa78963ffc8b870059d5787079fbbd7c52a5;hp=e69de29bb2d1d6434b8b29ae775ad8c2e48c5391;hpb=58936d6ab733acf784cf8b1a8f6839b7a75bfe7a;p=wmpus

diff --git a/util.h b/util.h
index e69de29..005dba6 100644
--- a/util.h
+++ b/util.h
@@ -0,0 +1,42 @@
+/* Misc macros */
+#define MAX(a,b) ((a) > (b) ? (a) : (b))
+#define MIN(a,b) ((a) < (b) ? (a) : (b))
+
+#define new0(type) (calloc(1, sizeof(type)))
+
+#define countof(x) (sizeof(x)/sizeof((x)[0]))
+
+/* Constant lenght map functitons */
+#define map_getg(map, test) ({ \
+	int i; \
+	for (i = 0; i < countof(map) && !(test); i++); \
+	i < countof(map) ? &map[i] : NULL ; \
+})
+
+#define map_get(m,k)    map_getg(m,k==*((typeof(k)*)&m[i]))
+#define map_getr(m,k)   map_getg(m,k==*(((typeof(k)*)&m[i+1])-1))
+#define map_getk(m,k,a) map_getg(m,k==m[i].a)
+
+/* Linked lists */
+typedef struct list {
+	struct list *prev;
+	struct list *next;
+	void   *data;
+} list_t;
+
+list_t *list_insert(list_t *after, void *data);
+
+void list_insert_after(list_t *after, void *data);
+
+list_t *list_append(list_t *before, void *data);
+
+list_t *list_remove(list_t *head, list_t *item);
+
+int list_length(list_t *item);
+
+list_t *list_last(list_t *list);
+
+list_t *list_find(list_t *list, void *data);
+
+/* Misc */
+int error(char *fmt, ...);