2 files changed, 33 insertions, 0 deletions
diff --git a/src/common/util.c b/src/common/util.c
index 7b9e5eb562..0e7f59e620 100644
--- a/src/common/util.c
+++ b/src/common/util.c
@@ -345,6 +345,36 @@ round_to_power_of_2(uint64_t u64)
     return low;
 }
 
+/** Return the lowest x such that x is at least <b>number</b>, and x modulo
+ * <b>divisor</b> == 0. */
+unsigned
+round_to_next_multiple_of(unsigned number, unsigned divisor)
+{
+  number += divisor - 1;
+  number -= number % divisor;
+  return number;
+}
+
+/** Return the lowest x such that x is at least <b>number</b>, and x modulo
+ * <b>divisor</b> == 0. */
+uint32_t
+round_uint32_to_next_multiple_of(uint32_t number, uint32_t divisor)
+{
+  number += divisor - 1;
+  number -= number % divisor;
+  return number;
+}
+
+/** Return the lowest x such that x is at least <b>number</b>, and x modulo
+ * <b>divisor</b> == 0. */
+uint64_t
+round_uint64_to_next_multiple_of(uint64_t number, uint64_t divisor)
+{
+  number += divisor - 1;
+  number -= number % divisor;
+  return number;
+}
+
 /* =====
  * String manipulation
  * ===== */
diff --git a/src/common/util.h b/src/common/util.h
index 18033f39df..1c5643be39 100644
--- a/src/common/util.h
+++ b/src/common/util.h
@@ -154,6 +154,9 @@ void tor_log_mallinfo(int severity);
 /* Math functions */
 int tor_log2(uint64_t u64) ATTR_CONST;
 uint64_t round_to_power_of_2(uint64_t u64);
+unsigned round_to_next_multiple_of(unsigned number, unsigned divisor);
+uint32_t round_uint32_to_next_multiple_of(uint32_t number, uint32_t divisor);
+uint64_t round_uint64_to_next_multiple_of(uint64_t number, uint64_t divisor);
 
 /* String manipulation */