159 lines
4.1 KiB
C
159 lines
4.1 KiB
C
/*
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* Copyright (C) 2001-2017 Artifex Software, Inc.
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* All Rights Reserved.
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*
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* This software is provided AS-IS with no warranty, either express or
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* implied.
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*
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* This software is distributed under license and may not be copied,
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* modified or distributed except as expressly authorized under the terms
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* of the license contained in the file LICENSE in this distribution.
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*
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* Refer to licensing information at http://www.artifex.com or contact
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* Artifex Software, Inc., 7 Mt. Lassen Drive - Suite A-134, San Rafael,
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* CA 94903, U.S.A., +1(415)492-9861, for further information.
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*/
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#if !defined(SHARE_JPEG) || SHARE_JPEG==0
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#include "jinclude.h"
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#include "jpeglib.h"
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#include "jmemsys.h"
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#include "jerror.h"
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#include "jmemcust.h"
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GLOBAL(void *)
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jpeg_get_small (j_common_ptr cinfo, size_t sizeofobject)
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{
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jpeg_cust_mem_data *cmem = GET_CUST_MEM_DATA(cinfo);
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return (void *) (cmem->j_mem_get_small)(cinfo, sizeofobject);
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}
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GLOBAL(void)
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jpeg_free_small (j_common_ptr cinfo, void * object, size_t sizeofobject)
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{
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jpeg_cust_mem_data *cmem = GET_CUST_MEM_DATA(cinfo);
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(cmem->j_mem_free_small)(cinfo, object, sizeofobject);
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}
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/*
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* "Large" objects are treated the same as "small" ones.
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* NB: although we include FAR keywords in the routine declarations,
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* this file won't actually work in 80x86 small/medium model; at least,
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* you probably won't be able to process useful-size images in only 64KB.
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*/
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GLOBAL(void FAR *)
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jpeg_get_large (j_common_ptr cinfo, size_t sizeofobject)
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{
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jpeg_cust_mem_data *cmem = GET_CUST_MEM_DATA(cinfo);
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return (void *) (cmem->j_mem_get_large)(cinfo, sizeofobject);
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}
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GLOBAL(void)
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jpeg_free_large (j_common_ptr cinfo, void FAR * object, size_t sizeofobject)
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{
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jpeg_cust_mem_data *cmem = GET_CUST_MEM_DATA(cinfo);
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(cmem->j_mem_free_large)(cinfo, object, sizeofobject);
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}
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/*
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* This routine computes the total memory space available for allocation.
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* Here we always say, "we got all you want bud!"
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*/
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GLOBAL(long)
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jpeg_mem_available (j_common_ptr cinfo, long min_bytes_needed,
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long max_bytes_needed, long already_allocated)
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{
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jpeg_cust_mem_data *cmem = GET_CUST_MEM_DATA(cinfo);
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long ret = max_bytes_needed;
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if (cmem->j_mem_avail)
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ret = (cmem->j_mem_avail)(cinfo);
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return ret;
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}
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/*
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* Backing store (temporary file) management.
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* Since jpeg_mem_available always promised the moon,
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* this should never be called and we can just error out.
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*/
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GLOBAL(void)
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jpeg_open_backing_store (j_common_ptr cinfo, backing_store_ptr info,
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long total_bytes_needed)
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{
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jpeg_cust_mem_data *cmem = GET_CUST_MEM_DATA(cinfo);
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if (cmem->j_mem_open_backing_store) {
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(cmem->j_mem_open_backing_store)(cinfo, info, total_bytes_needed);
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}
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else
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ERREXIT(cinfo, JERR_NO_BACKING_STORE);
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}
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/*
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* These routines take care of any system-dependent initialization and
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* cleanup required. Here, there isn't any.
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*/
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GLOBAL(long)
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jpeg_mem_init (j_common_ptr cinfo)
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{
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jpeg_cust_mem_data *cmem = GET_CUST_MEM_DATA(cinfo);
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long ret = 0;
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if (cmem->j_mem_init)
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ret = (cmem->j_mem_init)(cinfo);
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return ret;
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}
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GLOBAL(void)
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jpeg_mem_term (j_common_ptr cinfo)
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{
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jpeg_cust_mem_data *cmem = GET_CUST_MEM_DATA(cinfo);
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if (cmem->j_mem_term)
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(cmem->j_mem_term)(cinfo);
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}
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GLOBAL(jpeg_cust_mem_data *)
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jpeg_cust_mem_init(jpeg_cust_mem_data *custm, void *priv,
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j_custmem_init_ptr init,
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j_custmem_term_ptr term,
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j_custmem_avail_ptr avail,
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j_custmem_get_small_ptr get_small,
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j_custmem_free_small_ptr free_small,
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j_cust_mem_get_large_ptr get_large,
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j_custmem_free_large_ptr free_large,
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j_custmem_open_backing_store_ptr open_backing_store)
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{
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jpeg_cust_mem_data *lcustm = NULL;
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/* We need at least the following for a viable memory manager */
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if (get_small && free_small && get_large && free_large)
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{
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lcustm = custm;
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lcustm->priv = priv;
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lcustm->j_mem_init = init;
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lcustm->j_mem_term = term;
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lcustm->j_mem_avail = avail;
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lcustm->j_mem_get_small = get_small;
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lcustm->j_mem_free_small = free_small;
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lcustm->j_mem_get_large = get_large;
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lcustm->j_mem_free_large = free_large;
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lcustm->j_mem_open_backing_store = open_backing_store;
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}
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return lcustm;
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}
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#endif /* !defined(SHARE_JPEG) || SHARE_JPEG==0 */
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