The Tor Browser: media/libjpeg/jmemnobs.c@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     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  */

    18 #define JPEG_INTERNALS

    19 #include "jinclude.h"

    20 #include "jpeglib.h"

    21 #include "jmemsys.h"		/* import the system-dependent declarations */

    23 #ifndef HAVE_STDLIB_H		/* <stdlib.h> should declare malloc(),free() */

    24 extern void * malloc JPP((size_t size));

    25 extern void free JPP((void *ptr));

    26 #endif

    29 /*

    30  * Memory allocation and freeing are controlled by the regular library

    31  * routines malloc() and free().

    32  */

    34 GLOBAL(void *)

    35 jpeg_get_small (j_common_ptr cinfo, size_t sizeofobject)

    36 {

    37   return (void *) malloc(sizeofobject);

    38 }

    40 GLOBAL(void)

    41 jpeg_free_small (j_common_ptr cinfo, void * object, size_t sizeofobject)

    42 {

    43   free(object);

    44 }

    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  */

    54 GLOBAL(void FAR *)

    55 jpeg_get_large (j_common_ptr cinfo, size_t sizeofobject)

    56 {

    57   return (void FAR *) malloc(sizeofobject);

    58 }

    60 GLOBAL(void)

    61 jpeg_free_large (j_common_ptr cinfo, void FAR * object, size_t sizeofobject)

    62 {

    63   free(object);

    64 }

    67 /*

    68  * This routine computes the total memory space available for allocation.

    69  * Here we always say, "we got all you want bud!"

    70  */

    72 GLOBAL(size_t)

    73 jpeg_mem_available (j_common_ptr cinfo, size_t min_bytes_needed,

    74 		    size_t max_bytes_needed, size_t already_allocated)

    75 {

    76   return max_bytes_needed;

    77 }

    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  */

    86 GLOBAL(void)

    87 jpeg_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 }

    94 /*

    95  * These routines take care of any system-dependent initialization and

    96  * cleanup required.  Here, there isn't any.

    97  */

    99 GLOBAL(long)

   100 jpeg_mem_init (j_common_ptr cinfo)

   101 {

   102   return 0;			/* just set max_memory_to_use to 0 */

   103 }

   105 GLOBAL(void)

   106 jpeg_mem_term (j_common_ptr cinfo)

   107 {

   108   /* no work */

   109 }

The Tor Browser / file revision