nuclear@14: /*
nuclear@14:  * jmemnobs.c
nuclear@14:  *
nuclear@14:  * Copyright (C) 1992-1996, Thomas G. Lane.
nuclear@14:  * This file is part of the Independent JPEG Group's software.
nuclear@14:  * For conditions of distribution and use, see the accompanying README file.
nuclear@14:  *
nuclear@14:  * This file provides a really simple implementation of the system-
nuclear@14:  * dependent portion of the JPEG memory manager.  This implementation
nuclear@14:  * assumes that no backing-store files are needed: all required space
nuclear@14:  * can be obtained from malloc().
nuclear@14:  * This is very portable in the sense that it'll compile on almost anything,
nuclear@14:  * but you'd better have lots of main memory (or virtual memory) if you want
nuclear@14:  * to process big images.
nuclear@14:  * Note that the max_memory_to_use option is ignored by this implementation.
nuclear@14:  */
nuclear@14: 
nuclear@14: #define JPEG_INTERNALS
nuclear@14: #include "jinclude.h"
nuclear@14: #include "jpeglib.h"
nuclear@14: #include "jmemsys.h"		/* import the system-dependent declarations */
nuclear@14: 
nuclear@14: #ifndef HAVE_STDLIB_H		/* <stdlib.h> should declare malloc(),free() */
nuclear@14: extern void * malloc JPP((size_t size));
nuclear@14: extern void free JPP((void *ptr));
nuclear@14: #endif
nuclear@14: 
nuclear@14: 
nuclear@14: /*
nuclear@14:  * Memory allocation and freeing are controlled by the regular library
nuclear@14:  * routines malloc() and free().
nuclear@14:  */
nuclear@14: 
nuclear@14: GLOBAL(void *)
nuclear@14: jpeg_get_small (j_common_ptr cinfo, size_t sizeofobject)
nuclear@14: {
nuclear@14:   return (void *) malloc(sizeofobject);
nuclear@14: }
nuclear@14: 
nuclear@14: GLOBAL(void)
nuclear@14: jpeg_free_small (j_common_ptr cinfo, void * object, size_t sizeofobject)
nuclear@14: {
nuclear@14:   free(object);
nuclear@14: }
nuclear@14: 
nuclear@14: 
nuclear@14: /*
nuclear@14:  * "Large" objects are treated the same as "small" ones.
nuclear@14:  * NB: although we include FAR keywords in the routine declarations,
nuclear@14:  * this file won't actually work in 80x86 small/medium model; at least,
nuclear@14:  * you probably won't be able to process useful-size images in only 64KB.
nuclear@14:  */
nuclear@14: 
nuclear@14: GLOBAL(void FAR *)
nuclear@14: jpeg_get_large (j_common_ptr cinfo, size_t sizeofobject)
nuclear@14: {
nuclear@14:   return (void FAR *) malloc(sizeofobject);
nuclear@14: }
nuclear@14: 
nuclear@14: GLOBAL(void)
nuclear@14: jpeg_free_large (j_common_ptr cinfo, void FAR * object, size_t sizeofobject)
nuclear@14: {
nuclear@14:   free(object);
nuclear@14: }
nuclear@14: 
nuclear@14: 
nuclear@14: /*
nuclear@14:  * This routine computes the total memory space available for allocation.
nuclear@14:  * Here we always say, "we got all you want bud!"
nuclear@14:  */
nuclear@14: 
nuclear@14: GLOBAL(long)
nuclear@14: jpeg_mem_available (j_common_ptr cinfo, long min_bytes_needed,
nuclear@14: 		    long max_bytes_needed, long already_allocated)
nuclear@14: {
nuclear@14:   return max_bytes_needed;
nuclear@14: }
nuclear@14: 
nuclear@14: 
nuclear@14: /*
nuclear@14:  * Backing store (temporary file) management.
nuclear@14:  * Since jpeg_mem_available always promised the moon,
nuclear@14:  * this should never be called and we can just error out.
nuclear@14:  */
nuclear@14: 
nuclear@14: GLOBAL(void)
nuclear@14: jpeg_open_backing_store (j_common_ptr cinfo, backing_store_ptr info,
nuclear@14: 			 long total_bytes_needed)
nuclear@14: {
nuclear@14:   ERREXIT(cinfo, JERR_NO_BACKING_STORE);
nuclear@14: }
nuclear@14: 
nuclear@14: 
nuclear@14: /*
nuclear@14:  * These routines take care of any system-dependent initialization and
nuclear@14:  * cleanup required.  Here, there isn't any.
nuclear@14:  */
nuclear@14: 
nuclear@14: GLOBAL(long)
nuclear@14: jpeg_mem_init (j_common_ptr cinfo)
nuclear@14: {
nuclear@14:   return 0;			/* just set max_memory_to_use to 0 */
nuclear@14: }
nuclear@14: 
nuclear@14: GLOBAL(void)
nuclear@14: jpeg_mem_term (j_common_ptr cinfo)
nuclear@14: {
nuclear@14:   /* no work */
nuclear@14: }