# Declaration of W3C Sample Code Persistent Cache Manager

    /*
    **	(c) COPYRIGHT MIT 1995.
    **	Please first read the full copyright statement in the file COPYRIGH.
    */

Caching is a required part of any efficient Internet access applications as it saves bandwidth and improves access performance significantly in almost all types of accesses. The Library supports two different types of cache: The memory cache and the file cache. The two types differ in several ways which reflects their two main purposes: The memory cache is for short term storage of graphic objects whereas the file cache is for intermediate term storage of data objects. Often it is desirable to have both a memory and a file version of a cached document, so the two types do not exclude each other.

The cache contains details of persietent files which contain the contents of remote documents. The existing cache manager is somewhat naive - especially in its garbage collection but it is just an example of how it can be done. More advanced implementations are welcome!

    #ifndef WWWCACHE_H
    #define WWWCACHE_H

    #ifdef __cplusplus
    extern "C" {
    #endif

### System dependencies

The wwwsys.h file includes system-specific include files and flags for I/O to network and disk. The only reason for this file is that the Internet world is more complicated than Posix and ANSI.

    #include "wwwsys.h"

### Caching Manager

The cache interface defines a persistent cache manager based on accessing files.

    #include "HTCache.h"

    #ifdef __cplusplus
    } /* end extern C definitions */
    #endif

    #endif