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diff --git a/core/src/fxcodec/libjpeg/jmemsys.h b/core/src/fxcodec/libjpeg/jmemsys.h
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+/*

+ * jmemsys.h

+ *

+ * Copyright (C) 1992-1997, Thomas G. Lane.

+ * This file is part of the Independent JPEG Group's software.

+ * For conditions of distribution and use, see the accompanying README file.

+ *

+ * This include file defines the interface between the system-independent

+ * and system-dependent portions of the JPEG memory manager.  No other

+ * modules need include it.  (The system-independent portion is jmemmgr.c;

+ * there are several different versions of the system-dependent portion.)

+ *

+ * This file works as-is for the system-dependent memory managers supplied

+ * in the IJG distribution.  You may need to modify it if you write a

+ * custom memory manager.  If system-dependent changes are needed in

+ * this file, the best method is to #ifdef them based on a configuration

+ * symbol supplied in jconfig.h, as we have done with USE_MSDOS_MEMMGR

+ * and USE_MAC_MEMMGR.

+ */

+

+

+/* Short forms of external names for systems with brain-damaged linkers. */

+

+#ifdef NEED_SHORT_EXTERNAL_NAMES

+#define jpeg_get_small		jGetSmall

+#define jpeg_free_small		jFreeSmall

+#define jpeg_get_large		jGetLarge

+#define jpeg_free_large		jFreeLarge

+#define jpeg_mem_available	jMemAvail

+#define jpeg_open_backing_store	jOpenBackStore

+#define jpeg_mem_init		jMemInit

+#define jpeg_mem_term		jMemTerm

+#endif /* NEED_SHORT_EXTERNAL_NAMES */

+

+

+/*

+ * These two functions are used to allocate and release small chunks of

+ * memory.  (Typically the total amount requested through jpeg_get_small is

+ * no more than 20K or so; this will be requested in chunks of a few K each.)

+ * Behavior should be the same as for the standard library functions malloc

+ * and free; in particular, jpeg_get_small must return NULL on failure.

+ * On most systems, these ARE malloc and free.  jpeg_free_small is passed the

+ * size of the object being freed, just in case it's needed.

+ * On an 80x86 machine using small-data memory model, these manage near heap.

+ */

+

+EXTERN(void *) jpeg_get_small JPP((j_common_ptr cinfo, size_t sizeofobject));

+EXTERN(void) jpeg_free_small JPP((j_common_ptr cinfo, void * object,

+				  size_t sizeofobject));

+

+/*

+ * These two functions are used to allocate and release large chunks of

+ * memory (up to the total free space designated by jpeg_mem_available).

+ * The interface is the same as above, except that on an 80x86 machine,

+ * far pointers are used.  On most other machines these are identical to

+ * the jpeg_get/free_small routines; but we keep them separate anyway,

+ * in case a different allocation strategy is desirable for large chunks.

+ */

+

+EXTERN(void FAR *) jpeg_get_large JPP((j_common_ptr cinfo,

+				       size_t sizeofobject));

+EXTERN(void) jpeg_free_large JPP((j_common_ptr cinfo, void FAR * object,

+				  size_t sizeofobject));

+

+/*

+ * The macro MAX_ALLOC_CHUNK designates the maximum number of bytes that may

+ * be requested in a single call to jpeg_get_large (and jpeg_get_small for that

+ * matter, but that case should never come into play).  This macro is needed

+ * to model the 64Kb-segment-size limit of far addressing on 80x86 machines.

+ * On those machines, we expect that jconfig.h will provide a proper value.

+ * On machines with 32-bit flat address spaces, any large constant may be used.

+ *

+ * NB: jmemmgr.c expects that MAX_ALLOC_CHUNK will be representable as type

+ * size_t and will be a multiple of sizeof(align_type).

+ */

+

+#ifndef MAX_ALLOC_CHUNK		/* may be overridden in jconfig.h */

+#define MAX_ALLOC_CHUNK  1000000000L

+#endif

+

+/*

+ * This routine computes the total space still available for allocation by

+ * jpeg_get_large.  If more space than this is needed, backing store will be

+ * used.  NOTE: any memory already allocated must not be counted.

+ *

+ * There is a minimum space requirement, corresponding to the minimum

+ * feasible buffer sizes; jmemmgr.c will request that much space even if

+ * jpeg_mem_available returns zero.  The maximum space needed, enough to hold

+ * all working storage in memory, is also passed in case it is useful.

+ * Finally, the total space already allocated is passed.  If no better

+ * method is available, cinfo->mem->max_memory_to_use - already_allocated

+ * is often a suitable calculation.

+ *

+ * It is OK for jpeg_mem_available to underestimate the space available

+ * (that'll just lead to more backing-store access than is really necessary).

+ * However, an overestimate will lead to failure.  Hence it's wise to subtract

+ * a slop factor from the true available space.  5% should be enough.

+ *

+ * On machines with lots of virtual memory, any large constant may be returned.

+ * Conversely, zero may be returned to always use the minimum amount of memory.

+ */

+

+EXTERN(long) jpeg_mem_available JPP((j_common_ptr cinfo,

+				     long min_bytes_needed,

+				     long max_bytes_needed,

+				     long already_allocated));

+

+

+/*

+ * This structure holds whatever state is needed to access a single

+ * backing-store object.  The read/write/close method pointers are called

+ * by jmemmgr.c to manipulate the backing-store object; all other fields

+ * are private to the system-dependent backing store routines.

+ */

+

+#define TEMP_NAME_LENGTH   64	/* max length of a temporary file's name */

+

+

+#ifdef USE_MSDOS_MEMMGR		/* DOS-specific junk */

+

+typedef unsigned short XMSH;	/* type of extended-memory handles */

+typedef unsigned short EMSH;	/* type of expanded-memory handles */

+

+typedef union {

+  short file_handle;		/* DOS file handle if it's a temp file */

+  XMSH xms_handle;		/* handle if it's a chunk of XMS */

+  EMSH ems_handle;		/* handle if it's a chunk of EMS */

+} handle_union;

+

+#endif /* USE_MSDOS_MEMMGR */

+

+#ifdef USE_MAC_MEMMGR		/* Mac-specific junk */

+#include <Files.h>

+#endif /* USE_MAC_MEMMGR */

+

+

+typedef struct backing_store_struct * backing_store_ptr;

+

+typedef struct backing_store_struct {

+  /* Methods for reading/writing/closing this backing-store object */

+  JMETHOD(void, read_backing_store, (j_common_ptr cinfo,

+				     backing_store_ptr info,

+				     void FAR * buffer_address,

+				     long file_offset, long byte_count));

+  JMETHOD(void, write_backing_store, (j_common_ptr cinfo,

+				      backing_store_ptr info,

+				      void FAR * buffer_address,

+				      long file_offset, long byte_count));

+  JMETHOD(void, close_backing_store, (j_common_ptr cinfo,

+				      backing_store_ptr info));

+

+  /* Private fields for system-dependent backing-store management */

+#ifdef USE_MSDOS_MEMMGR

+  /* For the MS-DOS manager (jmemdos.c), we need: */

+  handle_union handle;		/* reference to backing-store storage object */

+  char temp_name[TEMP_NAME_LENGTH]; /* name if it's a file */

+#else

+#ifdef USE_MAC_MEMMGR

+  /* For the Mac manager (jmemmac.c), we need: */

+  short temp_file;		/* file reference number to temp file */

+  FSSpec tempSpec;		/* the FSSpec for the temp file */

+  char temp_name[TEMP_NAME_LENGTH]; /* name if it's a file */

+#else

+  /* For a typical implementation with temp files, we need: */

+#ifndef _FPDFAPI_MINI_

+  FXSYS_FILE * temp_file;		/* stdio reference to temp file */

+  char temp_name[TEMP_NAME_LENGTH]; /* name of temp file */

+#endif

+#endif

+#endif

+} backing_store_info;

+

+

+/*

+ * Initial opening of a backing-store object.  This must fill in the

+ * read/write/close pointers in the object.  The read/write routines

+ * may take an error exit if the specified maximum file size is exceeded.

+ * (If jpeg_mem_available always returns a large value, this routine can

+ * just take an error exit.)

+ */

+

+EXTERN(void) jpeg_open_backing_store JPP((j_common_ptr cinfo,

+					  backing_store_ptr info,

+					  long total_bytes_needed));

+

+

+/*

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

+ * cleanup required.  jpeg_mem_init will be called before anything is

+ * allocated (and, therefore, nothing in cinfo is of use except the error

+ * manager pointer).  It should return a suitable default value for

+ * max_memory_to_use; this may subsequently be overridden by the surrounding

+ * application.  (Note that max_memory_to_use is only important if

+ * jpeg_mem_available chooses to consult it ... no one else will.)

+ * jpeg_mem_term may assume that all requested memory has been freed and that

+ * all opened backing-store objects have been closed.

+ */

+

+EXTERN(long) jpeg_mem_init JPP((j_common_ptr cinfo));

+EXTERN(void) jpeg_mem_term JPP((j_common_ptr cinfo));