Add a string/string mapper struct

src/val_str.c

@@ -1,4 +1,4 @@
-#include <stdio.h>
+#include <string.h>
 #include <limits.h>
 #include "ucore/val_str.h"
 #include "ucore/saturating_math.h"
@@ -25,13 +25,15 @@ const char *uc_val_2_str_bs(unsigned int val,
 {
     size_t i = array_len;
     const struct UCValStr *start = array;
+    const char *found = NULL;
 
     while (i != 0) {
         const struct UCValStr *curr;
         curr = &start[i / 2]; //middle 
 
         if (curr->val == val) {
-            return curr->str;
+            found = curr->str;
+            break;
         }
 
         if (curr->val < val) {
@@ -42,6 +44,21 @@ const char *uc_val_2_str_bs(unsigned int val,
         i = i / 2; 
     }
 
-    return NULL;
+    return found;
+}
+
+const char *uc_str_2_str(const char *val, const struct UCStrStr *array)
+{
+    const char *found = NULL;
+
+    while (array->val) {
+        if (strcmp(val, array->val) == 0) {
+            found = array->str;
+            break;
+        }
+        array++;
+    }
+
+    return found;
 }