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jmemsys.h: Remove unused MS-DOS/Mac mem. mgr. code

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Those obsolete memory managers have never been included in
libjpeg-turbo, nor has libjpeg-turbo ever claimed to support MS-DOS
or Mac operating systems prior to OS X 10.4 "Tiger."  Note that we
retain the ability to use temp files, even though libjpeg-turbo does
not use them.  This allows downstream implementations to write their own
memory managers that use temp files, if necessary.
This commit is contained in:
DRC
2023-11-08 11:16:14 -05:00
parent 78eaf0d46d
commit 7c61794faf
1 changed files with 0 additions and 31 deletions
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31
jmemsys.h
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@@ -99,24 +99,6 @@ EXTERN(size_t) jpeg_mem_available(j_common_ptr cinfo, size_t min_bytes_needed,
#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 {
@@ -130,22 +112,9 @@ typedef struct backing_store_struct {
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: */
FILE *temp_file; /* stdio reference to temp file */
char temp_name[TEMP_NAME_LENGTH]; /* name of temp file */
#endif
#endif
} backing_store_info;