Use multiple sum algorithm from zlib for Adler and Fletcher checksums.

2025-12-16 19:24:29 +00:00 · 2021-09-22 23:49:32 +01:00
parent 186f57d7cb
commit bf1b026a7e
6 changed files with 409 additions and 38 deletions
--- a/fletcher16.h
+++ b/fletcher16.h
@@ -20,6 +20,8 @@
 #define AARU_CHECKSUMS_NATIVE_FLETCHER16_H

 #define FLETCHER16_MODULE 0xFF
+/* NMAX is the largest n such that 255n(n+1)/2 + (n+1)(ADLER_MODULE-1) <= 2^16-1 */
+#define NMAX 22

 typedef struct
 {