binary search for U64 and Rng1U64 arrays

src/base/base_math.c

@@ -634,6 +634,37 @@ rng1u64_array_from_list(Arena *arena, Rng1U64List *list)
   return arr;
 }
 
+internal U64
+rng_1u64_array_bsearch(Rng1U64Array arr, U64 value)
+{
+  if(arr.count > 0 && arr.v[0].min <= value && value < arr.v[arr.count-1].max)
+  {
+    U64 l = 0;
+    U64 r = arr.count - 1;
+    for(; l <= r; )
+    {
+      U64 m = l + (r - l) / 2;
+      if(contains_1u64(arr.v[m], value))
+      {
+        return m;
+      }
+      else if(arr.v[m].min < value)
+      {
+        l = m + 1;
+      }
+      else
+      {
+        r = m - 1;
+      }
+    }
+  }
+  else if(arr.count == 1 && contains_1u64(arr.v[0], value))
+  {
+    return 0;
+  }
+  return max_U64;
+}
+
 internal void
 rng1s64_list_push(Arena *arena, Rng1S64List *list, Rng1S64 rng)
 {
@@ -657,3 +688,4 @@ rng1s64_array_from_list(Arena *arena, Rng1S64List *list)
   }
   return arr;
 }
+