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Diffstat (limited to 'base/jmemcust.c')
| -rw-r--r-- | base/jmemcust.c | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/base/jmemcust.c b/base/jmemcust.c new file mode 100644 index 00000000..b452d83a --- /dev/null +++ b/base/jmemcust.c @@ -0,0 +1,166 @@ +/* Copyright (C) 2001-2019 Artifex Software, Inc. + All Rights Reserved. + + This software is provided AS-IS with no warranty, either express or + implied. + + This software is distributed under license and may not be copied, + modified or distributed except as expressly authorized under the terms + of the license contained in the file LICENSE in this distribution. + + Refer to licensing information at http://www.artifex.com or contact + Artifex Software, Inc., 1305 Grant Avenue - Suite 200, Novato, + CA 94945, U.S.A., +1(415)492-9861, for further information. +*/ + +#if !defined(SHARE_JPEG) || SHARE_JPEG==0 + +#include "jinclude.h" +#include "jpeglib.h" +#include "jerror.h" +#include "jmemcust.h" + +GLOBAL(void *) +jpeg_get_small (j_common_ptr cinfo, size_t sizeofobject) +{ + jpeg_cust_mem_data *cmem = GET_CUST_MEM_DATA(cinfo); + + return (void *) (cmem->j_mem_get_small)(cinfo, sizeofobject); +} + +GLOBAL(void) +jpeg_free_small (j_common_ptr cinfo, void * object, size_t sizeofobject) +{ + jpeg_cust_mem_data *cmem = GET_CUST_MEM_DATA(cinfo); + + (cmem->j_mem_free_small)(cinfo, object, sizeofobject); +} + +/* + * "Large" objects are treated the same as "small" ones. + * NB: although we include FAR keywords in the routine declarations, + * this file won't actually work in 80x86 small/medium model; at least, + * you probably won't be able to process useful-size images in only 64KB. + */ + +GLOBAL(void FAR *) +jpeg_get_large (j_common_ptr cinfo, size_t sizeofobject) +{ + jpeg_cust_mem_data *cmem = GET_CUST_MEM_DATA(cinfo); + + return (void *) (cmem->j_mem_get_large)(cinfo, sizeofobject); +} + +GLOBAL(void) +jpeg_free_large (j_common_ptr cinfo, void FAR * object, size_t sizeofobject) +{ + jpeg_cust_mem_data *cmem = GET_CUST_MEM_DATA(cinfo); + + (cmem->j_mem_free_large)(cinfo, object, sizeofobject); +} + +/* + * This routine computes the total memory space available for allocation. + * Here we always say, "we got all you want bud!" + */ + +GLOBAL(long) +jpeg_mem_available (j_common_ptr cinfo, long min_bytes_needed, + long max_bytes_needed, long already_allocated) +{ + jpeg_cust_mem_data *cmem = GET_CUST_MEM_DATA(cinfo); + long ret = max_bytes_needed; + + if (cmem->j_mem_avail) + ret = (cmem->j_mem_avail)(cinfo); + + return ret; +} + +/* + * Backing store (temporary file) management. + * Since jpeg_mem_available always promised the moon, + * this should never be called and we can just error out. + */ + +GLOBAL(void) +jpeg_open_backing_store (j_common_ptr cinfo, backing_store_ptr info, + long total_bytes_needed) +{ + jpeg_cust_mem_data *cmem = GET_CUST_MEM_DATA(cinfo); + + if (cmem->j_mem_open_backing_store) { + (cmem->j_mem_open_backing_store)(cinfo, info, total_bytes_needed); + } + else + ERREXIT(cinfo, JERR_NO_BACKING_STORE); +} + +/* + * These routines take care of any system-dependent initialization and + * cleanup required. Here, there isn't any. + */ + +GLOBAL(long) +jpeg_mem_init (j_common_ptr cinfo) +{ + jpeg_cust_mem_data *cmem = GET_CUST_MEM_DATA(cinfo); + long ret = 0; + + if (cmem->j_mem_init) + ret = (cmem->j_mem_init)(cinfo); + + return ret; +} + +GLOBAL(void) +jpeg_mem_term (j_common_ptr cinfo) +{ + jpeg_cust_mem_data *cmem = GET_CUST_MEM_DATA(cinfo); + + if (cmem->j_mem_term) + (cmem->j_mem_term)(cinfo); +} + +GLOBAL(jpeg_cust_mem_data *) +jpeg_cust_mem_init(jpeg_cust_mem_data *custm, void *priv, + j_custmem_init_ptr init, + j_custmem_term_ptr term, + j_custmem_avail_ptr avail, + j_custmem_get_small_ptr get_small, + j_custmem_free_small_ptr free_small, + j_cust_mem_get_large_ptr get_large, + j_custmem_free_large_ptr free_large, + j_custmem_open_backing_store_ptr open_backing_store) +{ + jpeg_cust_mem_data *lcustm = NULL; + + /* We need at least the following for a viable memory manager */ + if (get_small && free_small && get_large && free_large) + { + lcustm = custm; + + lcustm->priv = priv; + lcustm->j_mem_init = init; + lcustm->j_mem_term = term; + lcustm->j_mem_avail = avail; + lcustm->j_mem_get_small = get_small; + lcustm->j_mem_free_small = free_small; + lcustm->j_mem_get_large = get_large; + lcustm->j_mem_free_large = free_large; + lcustm->j_mem_open_backing_store = open_backing_store; + } + return lcustm; +} + +GLOBAL(jpeg_cust_mem_data *) +jpeg_cust_mem_set_private(jpeg_cust_mem_data *custm, void *priv) +{ + if (custm) + { + custm->priv = priv; + } + return custm; +} + +#endif /* !defined(SHARE_JPEG) || SHARE_JPEG==0 */ |