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- /* Copyright (C) 1993 Aladdin Enterprises. All rights reserved.
-
- This file is part of Aladdin Ghostscript.
-
- Aladdin Ghostscript is distributed with NO WARRANTY OF ANY KIND. No author
- or distributor accepts any responsibility for the consequences of using it,
- or for whether it serves any particular purpose or works at all, unless he
- or she says so in writing. Refer to the Aladdin Ghostscript Free Public
- License (the "License") for full details.
-
- Every copy of Aladdin Ghostscript must include a copy of the License,
- normally in a plain ASCII text file named PUBLIC. The License grants you
- the right to copy, modify and redistribute Aladdin Ghostscript, but only
- under certain conditions described in the License. Among other things, the
- License requires that the copyright notice and this notice be preserved on
- all copies.
- */
-
- /* gxcache.h */
- /* General-purpose cache schema for Ghostscript */
-
- #ifndef gxcache_INCLUDED
- # define gxcache_INCLUDED
-
- /*
- * Ghostscript caches a wide variety of information internally:
- * *font/matrix pairs, *scaled fonts, rendered characters,
- * binary halftones, *colored halftones, *Patterns,
- * and the results of many procedures (transfer functions, undercolor removal,
- * black generation, CIE color transformations).
- * The caches marked with * all use a similar structure: a chained hash
- * table with a maximum number of entries allocated in a single block,
- * and a roving pointer for purging.
- */
- #define cache_members(entry_type, hash_size)\
- uint csize, cmax;\
- uint cnext;\
- uint esize; /* for generic operations */\
- entry_type *entries;\
- entry_type *hash[hash_size];
- #define cache_init(pcache)\
- (memset((char *)(pcache)->hash, 0, sizeof((pcache)->hash)),\
- (pcache)->esize = sizeof(*(pcache)->entries),\
- (pcache)->entries = 0,\
- (pcache)->csize = (pcache)->cmax = (pcache)->cnext = 0)
- /*
- * The following operations should be generic, but can't be because
- * C doesn't provide templates: allocate, look up, add, purge at 'restore'.
- */
-
- #endif /* gxcache_INCLUDED */
-