最小内存为RAR DECOM pression [英] Minimum memory for RAR decompression

问题描述

什么是运行RAR DECOM pression算法所需的最小内存？

What's the minimum memory needed to run a RAR decompression algorithm?

我想将一个RAR DECOM pression算法，手机（iPhone，Android和黑莓），并想知道是否有一个最低限度的记忆开始前需要。我听说RAR DECOM pression需要比ZIP DECOM pression更多的内存。

I want to port a RAR decompression algorithm to mobiles (iPhone, Android and BlackBerry) and want to know if there's a bare minimum of memory needed before starting. I've heard that RAR decompression requires much more memory than ZIP decompression.

推荐答案

不少。字典的最大大小是<一href="http://svn.php.net/viewvc/pecl/rar/trunk/technote.txt?revision=298704&view=markup&sortby=date#l173"相对=nofollow> 4MB的的，但至少在正式的unrar库（其被来自同一来源的截至压缩建）<一href="http://svn.php.net/viewvc/pecl/rar/trunk/unrar/suballoc.cpp?revision=290883&view=markup&sortby=date#l89"相对=nofollow>接管24 MB 的一些DECOM pression算法。

Quite a lot. The maximum size of the dictionary are 4 MB, but at least the official unrar library (which is built from the same source as WinRAR) takes over 24 MB in some decompression algorithms.

（以最后声明：注意， T 至少为1 MB（ UINT T = SASize＆LT;小于20; ），但也可以是更多的是因为<一href="http://svn.php.net/viewvc/pecl/rar/trunk/unrar/model.cpp?revision=290883&view=markup&sortby=date#l564"相对=nofollow> SASize可能超过1 ）

(as to the last statement: note that the t is at least 1 MB (uint t=SASize << 20;), but can be more because SASize may be more than 1)

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