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/src/FreeImage/Source/LibJPEG/jmemnobs.c

https://bitbucket.org/cabalistic/ogredeps/
C | 109 lines | 49 code | 20 blank | 40 comment | 0 complexity | 0fa7947ebfd9f703df89b0aabd7f58a2 MD5 | raw file
  1/*
  2 * jmemnobs.c
  3 *
  4 * Copyright (C) 1992-1996, Thomas G. Lane.
  5 * This file is part of the Independent JPEG Group's software.
  6 * For conditions of distribution and use, see the accompanying README file.
  7 *
  8 * This file provides a really simple implementation of the system-
  9 * dependent portion of the JPEG memory manager.  This implementation
 10 * assumes that no backing-store files are needed: all required space
 11 * can be obtained from malloc().
 12 * This is very portable in the sense that it'll compile on almost anything,
 13 * but you'd better have lots of main memory (or virtual memory) if you want
 14 * to process big images.
 15 * Note that the max_memory_to_use option is ignored by this implementation.
 16 */
 17
 18#define JPEG_INTERNALS
 19#include "jinclude.h"
 20#include "jpeglib.h"
 21#include "jmemsys.h"		/* import the system-dependent declarations */
 22
 23#ifndef HAVE_STDLIB_H		/* <stdlib.h> should declare malloc(),free() */
 24extern void * malloc JPP((size_t size));
 25extern void free JPP((void *ptr));
 26#endif
 27
 28
 29/*
 30 * Memory allocation and freeing are controlled by the regular library
 31 * routines malloc() and free().
 32 */
 33
 34GLOBAL(void *)
 35jpeg_get_small (j_common_ptr cinfo, size_t sizeofobject)
 36{
 37  return (void *) malloc(sizeofobject);
 38}
 39
 40GLOBAL(void)
 41jpeg_free_small (j_common_ptr cinfo, void * object, size_t sizeofobject)
 42{
 43  free(object);
 44}
 45
 46
 47/*
 48 * "Large" objects are treated the same as "small" ones.
 49 * NB: although we include FAR keywords in the routine declarations,
 50 * this file won't actually work in 80x86 small/medium model; at least,
 51 * you probably won't be able to process useful-size images in only 64KB.
 52 */
 53
 54GLOBAL(void FAR *)
 55jpeg_get_large (j_common_ptr cinfo, size_t sizeofobject)
 56{
 57  return (void FAR *) malloc(sizeofobject);
 58}
 59
 60GLOBAL(void)
 61jpeg_free_large (j_common_ptr cinfo, void FAR * object, size_t sizeofobject)
 62{
 63  free(object);
 64}
 65
 66
 67/*
 68 * This routine computes the total memory space available for allocation.
 69 * Here we always say, "we got all you want bud!"
 70 */
 71
 72GLOBAL(long)
 73jpeg_mem_available (j_common_ptr cinfo, long min_bytes_needed,
 74		    long max_bytes_needed, long already_allocated)
 75{
 76  return max_bytes_needed;
 77}
 78
 79
 80/*
 81 * Backing store (temporary file) management.
 82 * Since jpeg_mem_available always promised the moon,
 83 * this should never be called and we can just error out.
 84 */
 85
 86GLOBAL(void)
 87jpeg_open_backing_store (j_common_ptr cinfo, backing_store_ptr info,
 88			 long total_bytes_needed)
 89{
 90  ERREXIT(cinfo, JERR_NO_BACKING_STORE);
 91}
 92
 93
 94/*
 95 * These routines take care of any system-dependent initialization and
 96 * cleanup required.  Here, there isn't any.
 97 */
 98
 99GLOBAL(long)
100jpeg_mem_init (j_common_ptr cinfo)
101{
102  return 0;			/* just set max_memory_to_use to 0 */
103}
104
105GLOBAL(void)
106jpeg_mem_term (j_common_ptr cinfo)
107{
108  /* no work */
109}