Add an unsigned int/string pair type, modelled on the value string of

wireshark

include/ucore/val_str.h

@@ -0,0 +1,37 @@
+#ifndef UC_VAL_STR_H_
+#define UC_VAL_STR_H_
+
+#include <stddef.h>
+
+struct UCValStr {
+    unsigned int val;
+    const char *str;
+};
+
+#define UC_VS_ENTRY(constant) {constant, #constant}
+#define UC_VS_TERMINATOR {-1, NULL}
+
+/** Find @val in @array.
+ * The last .str in @array must be a NULL pointer.
+ * (does a linear search)
+ *
+ * @param val value to find
+ * @param array array to search
+ * @return the string associated with @val or NULL
+ */
+const char *uc_vs_search(unsigned int val, const struct UCValStr *array);
+
+/** Find @val in @array.
+ * @array must be sorted on val and must not be empty
+ * (does a binary search)
+ *
+ * @param val value to find
+ * @param array array to search
+ * @return the string associated with @val or NULL
+ */
+const char *uc_vs_bsearch(unsigned int val, 
+                                       const struct UCValStr *array,
+                                       size_t array_len);
+
+
+#endif