102 lines
2.8 KiB
C++
102 lines
2.8 KiB
C++
// * jmemnobs.c
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// *
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// * Copyright (C) 1992-1994, Thomas G. Lane.
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// * This file is part of the Independent JPEG Group's software.
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// * For conditions of distribution and use, see the accompanying README file.
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// *
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// * This file provides a really simple implementation of the system-
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// * dependent portion of the JPEG memory manager. This implementation
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// * assumes that no backing-store files are needed: all required space
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// * can be obtained from malloc().
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// * This is very portable in the sense that it'll compile on almost anything,
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// * but you'd better have lots of main memory (or virtual memory) if you want
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// * to process big images.
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// * Note that the max_memory_to_use option is ignored by this implementation.
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#define JPEG_INTERNALS
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#include "JINCLUDE.h"
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#include "JPEGLIB.h"
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#include "JMEMSYS.h" // import the system-dependent declarations
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//#ifndef HAVE_STDLIB_H // <stdlib.h> should declare malloc(),free()
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//extern void * malloc JPP((size_t size));
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//extern void free JPP((void *ptr));
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//#endif
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void *jpgHightPointer = NULL;
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#define jpgHightPointer_BASE (1024*1024*100)
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// * Memory allocation and freeing are controlled by the regular library
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// * routines malloc() and free().
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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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return (void *) malloc(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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free(object);
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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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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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return (void FAR *) malloc(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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free(object);
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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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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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return max_bytes_needed;
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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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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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ERREXIT(cinfo, JERR_NO_BACKING_STORE);
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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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GLOBAL LONG
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jpeg_mem_init (j_common_ptr cinfo)
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{
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return 0; // just set max_memory_to_use to 0
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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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// no work
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}
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