From: Valentin Bartenev <vbart@nginx.com>
Date: Mon, 26 Oct 2015 14:46:16 +0000 (+0300)
Subject: HTTP/2: improved the ngx_http_v2_integer_octets(v) macro.
X-Git-Tag: release-1.9.6~2
X-Git-Url: http://www.kaiwu.me/postgresql/commit/?a=commitdiff_plain;h=d418b92cdcc869c39eff75d90e62182352d6978e;p=nginx.git

HTTP/2: improved the ngx_http_v2_integer_octets(v) macro.

Previously, it didn't work well for 0, 127, and 128, returning less than needed.
---

diff --git a/src/http/v2/ngx_http_v2_filter_module.c b/src/http/v2/ngx_http_v2_filter_module.c
index 2d1ced6a6..a866cdef6 100644
--- a/src/http/v2/ngx_http_v2_filter_module.c
+++ b/src/http/v2/ngx_http_v2_filter_module.c
@@ -12,7 +12,12 @@
 #include <ngx_http_v2_module.h>
 
 
-#define ngx_http_v2_integer_octets(v)  (((v) + 127) / 128)
+/*
+ * This returns precise number of octets for values in range 0..253
+ * and estimate number for the rest, but not smaller than required.
+ */
+
+#define ngx_http_v2_integer_octets(v)  (1 + (v) / 127)
 
 #define ngx_http_v2_literal_size(h)                                           \
     (ngx_http_v2_integer_octets(sizeof(h) - 1) + sizeof(h) - 1)