Quake-III-Arena

Quake III Arena GPL Source Release
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jmemnobs.cpp (2620B)

      1 /*
      2  * jmemnobs.c
      3  *
      4  * Copyright (C) 1992-1994, 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 ri.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 /*
     24  * Memory allocation and ri.Freeing are controlled by the regular library
     25  * routines ri.Malloc() and ri.Free().
     26  */
     27 
     28 GLOBAL void *
     29 jpeg_get_small (j_common_ptr cinfo, size_t sizeofobject)
     30 {
     31   return (void *) malloc(sizeofobject);
     32 }
     33 
     34 GLOBAL void
     35 jpeg_free_small (j_common_ptr cinfo, void * object, size_t sizeofobject)
     36 {
     37   free(object);
     38 }
     39 
     40 
     41 /*
     42  * "Large" objects are treated the same as "small" ones.
     43  * NB: although we include FAR keywords in the routine declarations,
     44  * this file won't actually work in 80x86 small/medium model; at least,
     45  * you probably won't be able to process useful-size images in only 64KB.
     46  */
     47 
     48 GLOBAL void FAR *
     49 jpeg_get_large (j_common_ptr cinfo, size_t sizeofobject)
     50 {
     51   return (void FAR *) malloc(sizeofobject);
     52 }
     53 
     54 GLOBAL void
     55 jpeg_free_large (j_common_ptr cinfo, void FAR * object, size_t sizeofobject)
     56 {
     57   free(object);
     58 }
     59 
     60 
     61 /*
     62  * This routine computes the total memory space available for allocation.
     63  * Here we always say, "we got all you want bud!"
     64  */
     65 
     66 GLOBAL long
     67 jpeg_mem_available (j_common_ptr cinfo, long min_bytes_needed,
     68 		    long max_bytes_needed, long already_allocated)
     69 {
     70   return max_bytes_needed;
     71 }
     72 
     73 
     74 /*
     75  * Backing store (temporary file) management.
     76  * Since jpeg_mem_available always promised the moon,
     77  * this should never be called and we can just error out.
     78  */
     79 
     80 GLOBAL void
     81 jpeg_open_backing_store (j_common_ptr cinfo, backing_store_ptr info,
     82 			 long total_bytes_needed)
     83 {
     84   ERREXIT(cinfo, JERR_NO_BACKING_STORE);
     85 }
     86 
     87 
     88 /*
     89  * These routines take care of any system-dependent initialization and
     90  * cleanup required.  Here, there isn't any.
     91  */
     92 
     93 GLOBAL long
     94 jpeg_mem_init (j_common_ptr cinfo)
     95 {
     96   return 0;			/* just set max_memory_to_use to 0 */
     97 }
     98 
     99 GLOBAL void
    100 jpeg_mem_term (j_common_ptr cinfo)
    101 {
    102   /* no work */
    103 }