From: Sage Weil <sage@newdream.net>
Date: Tue, 12 May 2020 16:51:32 +0000 (-0500)
Subject: common/rabin: add helper set_target_bits()
X-Git-Tag: v16.1.0~2230^2~26
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=f2271538d3e1df21718e59982457ed7875b1dad2;p=ceph.git

common/rabin: add helper set_target_bits()

Sets key chunking parameters in one easy call.

Signed-off-by: Sage Weil <sage@newdream.net>
---

diff --git a/src/common/rabin.h b/src/common/rabin.h
index 795d8aed7df23..163610ee19761 100644
--- a/src/common/rabin.h
+++ b/src/common/rabin.h
@@ -75,6 +75,12 @@ public:
     num_bits = bits;
   }
 
+  // most users should use this
+  void set_target_bits(int bits, int windowbits = 2) {
+    set_numbits(bits);
+    set_min_chunk(1 << (bits - windowbits));
+    set_max_chunk(1 << (bits + windowbits));
+  }
 
 private:
   bool end_of_chunk(const uint64_t fp , int numbits);