From 1c71d8b13b54f91ddec361d3053ecce26e6ff761 Mon Sep 17 00:00:00 2001
From: Mark Adler <madler@alumni.caltech.edu>
Date: Fri, 9 Sep 2011 23:07:35 -0700
Subject: zlib 0.91

---
 zconf.h | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

(limited to 'zconf.h')

diff --git a/zconf.h b/zconf.h
index 4e05a3e..1abb0ea 100644
--- a/zconf.h
+++ b/zconf.h
@@ -3,7 +3,7 @@
  * For conditions of distribution and use, see copyright notice in zlib.h 
  */
 
-/* $Id: zconf.h,v 1.10 1995/04/30 19:27:14 jloup Exp $ */
+/* $Id: zconf.h,v 1.11 1995/05/02 13:07:21 jloup Exp $ */
 
 #ifndef _ZCONF_H
 #define _ZCONF_H
@@ -32,6 +32,7 @@
 #  define STDC
 #endif
 
+/* Maximum value for memLevel in deflateInit2 */
 #ifndef MAX_MEM_LEVEL
 #  ifdef MAXSEG_64K
 #    define MAX_MEM_LEVEL 8
@@ -40,10 +41,24 @@
 #  endif
 #endif
 
+/* Maximum value for windowBits in deflateInit2 and inflateInit2 */
 #ifndef MAX_WBITS
 #  define MAX_WBITS   15 /* 32K LZ77 window */
 #endif
 
+/* The memory requirements for deflate are (in bytes):
+            1 << (windowBits+2)   +  1 << (memLevel+9)
+ that is: 128K for windowBits=15  +  128K for memLevel = 8  (default values)
+ plus a few kilobytes for small objects. For example, if you want to reduce
+ the default memory requirements from 256K to 128K, compile with
+     make CFLAGS="-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7"
+ Of course this will generally degrade compression (there's no free lunch).
+
+   The memory requirements for inflate are (in bytes) 1 << windowBits
+ that is, 32K for windowBits=15 (default value) plus a few kilobytes
+ for small objects.
+*/
+
 			/* Type declarations */
 
 #ifndef __P /* function prototypes */
-- 
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