Update to libjpeg_turbo 1.4.90

jmemsys.h

 /*
  * jmemsys.h
  *
+ * This file was part of the Independent JPEG Group's software:
  * 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.
+ * It was modified by The libjpeg-turbo Project to include only code and
+ * information relevant to libjpeg-turbo.
+ * For conditions of distribution and use, see the accompanying README.ijg
+ * 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.
+ * symbol supplied in jconfig.h.
  */
 
 
-/* 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));
+EXTERN(void *) jpeg_get_small (j_common_ptr cinfo, size_t sizeofobject);
+EXTERN(void) jpeg_free_small (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.
+ * 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));
+EXTERN(void *) jpeg_get_large (j_common_ptr cinfo, size_t sizeofobject);
+EXTERN(void) jpeg_free_large (j_common_ptr cinfo, void *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
+ * matter, but that case should never come into play).  This macro was 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.
+ * On machines with 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 */
+#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(size_t) jpeg_mem_available JPP((j_common_ptr cinfo,
-                                     size_t min_bytes_needed,
-                                     size_t max_bytes_needed,
-                                     size_t already_allocated));
+EXTERN(size_t) jpeg_mem_available (j_common_ptr cinfo, size_t min_bytes_needed,
+                                   size_t max_bytes_needed,
+                                   size_t 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 */
+#define TEMP_NAME_LENGTH   64   /* max length of a temporary file's name */
 
 
-#ifdef USE_MSDOS_MEMMGR         /* DOS-specific junk */
+#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 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 */
+  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 */
+#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 *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));
+  void (*read_backing_store) (j_common_ptr cinfo, backing_store_ptr info,
+                              void *buffer_address, long file_offset,
+                              long byte_count);
+  void (*write_backing_store) (j_common_ptr cinfo, backing_store_ptr info,
+                               void *buffer_address, long file_offset,
+                               long byte_count);
+  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 */
+  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 */
+  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: */
-  FILE * temp_file;             /* stdio reference to temp file */
+  FILE *temp_file;              /* stdio reference to temp file */
   char temp_name[TEMP_NAME_LENGTH]; /* name of temp file */
 #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));
+EXTERN(void) jpeg_open_backing_store (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));
+EXTERN(long) jpeg_mem_init (j_common_ptr cinfo);
+EXTERN(void) jpeg_mem_term (j_common_ptr cinfo);