jmemdos.c File Reference

#include "jinclude.h"
#include "jpeglib.h"
#include "jmemsys.h"

Go to the source code of this file.

Classes
struct	XMScontext
struct	EMScontext
union	XMSPTR
struct	XMSspec
union	EMSspec

Macros
#define	XMS_SUPPORTED   1
#define	EMS_SUPPORTED   1
#define	JPEG_INTERNALS
#define	far_malloc(x)   malloc(x)
#define	far_free(x)   free(x)
#define	READ_BINARY   "rb"
#define	DEFAULT_MAX_MEM   300000L /* for total usage about 450K */
#define	ODD(X)   (((X) & 1L) != 0)
#define	FIELD_AT(spec, offset, type)   (*((type *) &(spec.bytes[offset])))
#define	SRC_TYPE(spec)   FIELD_AT(spec,4,char)
#define	SRC_HANDLE(spec)   FIELD_AT(spec,5,EMSH)
#define	SRC_OFFSET(spec)   FIELD_AT(spec,7,unsigned short)
#define	SRC_PAGE(spec)   FIELD_AT(spec,9,unsigned short)
#define	SRC_PTR(spec)   FIELD_AT(spec,7,EMSPTR)
#define	DST_TYPE(spec)   FIELD_AT(spec,11,char)
#define	DST_HANDLE(spec)   FIELD_AT(spec,12,EMSH)
#define	DST_OFFSET(spec)   FIELD_AT(spec,14,unsigned short)
#define	DST_PAGE(spec)   FIELD_AT(spec,16,unsigned short)
#define	DST_PTR(spec)   FIELD_AT(spec,14,EMSPTR)
#define	EMSPAGESIZE   16384L /* gospel, see the EMS specs */
#define	HIBYTE(W)   (((W) >> 8) & 0xFF)
#define	LOBYTE(W)   ((W) & 0xFF)

Typedefs
typedef void far *	EMSPTR

Functions
EXTERN short far jdos_open	JPP ((short far *handle, char far *filename))
EXTERN short far jdos_close	JPP ((short handle))
EXTERN short far jdos_seek	JPP ((short handle, long offset))
EXTERN short far jdos_read	JPP ((short handle, void far *buffer, unsigned short count))
EXTERN void far jxms_getdriver	JPP ((XMSDRIVER far *))
EXTERN void far jxms_calldriver	JPP ((XMSDRIVER, XMScontext far *))
EXTERN short far jems_available	JPP ((void))
EXTERN void far jems_calldriver	JPP ((EMScontext far *))
LOCAL void	select_file_name (char *fname)
GLOBAL void *	jpeg_get_small (j_common_ptr cinfo, size_t sizeofobject)
GLOBAL void	jpeg_free_small (j_common_ptr cinfo, void *object, size_t sizeofobject)
GLOBAL void FAR *	jpeg_get_large (j_common_ptr cinfo, size_t sizeofobject)
GLOBAL void	jpeg_free_large (j_common_ptr cinfo, void FAR *object, size_t sizeofobject)
GLOBAL long	jpeg_mem_available (j_common_ptr cinfo, long min_bytes_needed, long max_bytes_needed, long already_allocated)
METHODDEF void	read_file_store (j_common_ptr cinfo, backing_store_ptr info, void FAR *buffer_address, long file_offset, long byte_count)
METHODDEF void	write_file_store (j_common_ptr cinfo, backing_store_ptr info, void FAR *buffer_address, long file_offset, long byte_count)
METHODDEF void	close_file_store (j_common_ptr cinfo, backing_store_ptr info)
LOCAL boolean	open_file_store (j_common_ptr cinfo, backing_store_ptr info, long total_bytes_needed)
METHODDEF void	read_xms_store (j_common_ptr cinfo, backing_store_ptr info, void FAR *buffer_address, long file_offset, long byte_count)
METHODDEF void	write_xms_store (j_common_ptr cinfo, backing_store_ptr info, void FAR *buffer_address, long file_offset, long byte_count)
METHODDEF void	close_xms_store (j_common_ptr cinfo, backing_store_ptr info)
LOCAL boolean	open_xms_store (j_common_ptr cinfo, backing_store_ptr info, long total_bytes_needed)
METHODDEF void	read_ems_store (j_common_ptr cinfo, backing_store_ptr info, void FAR *buffer_address, long file_offset, long byte_count)
METHODDEF void	write_ems_store (j_common_ptr cinfo, backing_store_ptr info, void FAR *buffer_address, long file_offset, long byte_count)
METHODDEF void	close_ems_store (j_common_ptr cinfo, backing_store_ptr info)
LOCAL boolean	open_ems_store (j_common_ptr cinfo, backing_store_ptr info, long total_bytes_needed)
GLOBAL void	jpeg_open_backing_store (j_common_ptr cinfo, backing_store_ptr info, long total_bytes_needed)
GLOBAL long	jpeg_mem_init (j_common_ptr cinfo)
GLOBAL void	jpeg_mem_term (j_common_ptr cinfo)

Variables
MAX_ALLOC_CHUNK should be less than typedef void far *	XMSDRIVER

Macro Definition Documentation

#define DEFAULT_MAX_MEM   300000L /* for total usage about 450K */

Definition at line 200 of file jmemdos.c.

#define DST_HANDLE

(

spec

)

FIELD_AT(spec,12,EMSH)

Definition at line 475 of file jmemdos.c.

#define DST_OFFSET

(

spec

)

FIELD_AT(spec,14,unsigned short)

Definition at line 476 of file jmemdos.c.

#define DST_PAGE

(

spec

)

FIELD_AT(spec,16,unsigned short)

Definition at line 477 of file jmemdos.c.

#define DST_PTR

(

spec

)

FIELD_AT(spec,14,EMSPTR)

Definition at line 478 of file jmemdos.c.

#define DST_TYPE

(

spec

)

FIELD_AT(spec,11,char)

Definition at line 474 of file jmemdos.c.

#define EMS_SUPPORTED   1

Definition at line 38 of file jmemdos.c.

#define EMSPAGESIZE   16384L /* gospel, see the EMS specs */

Definition at line 480 of file jmemdos.c.

#define far_free

(

x

)

free(x)

Definition at line 70 of file jmemdos.c.

#define far_malloc

(

x

)

malloc(x)

Definition at line 69 of file jmemdos.c.

#define FIELD_AT	(		spec,
			offset,
			type
	)		(*((type *) &(spec.bytes[offset])))

Definition at line 468 of file jmemdos.c.

#define HIBYTE

(

W

)

(((W) >> 8) & 0xFF)

Definition at line 482 of file jmemdos.c.

#define JPEG_INTERNALS

Definition at line 42 of file jmemdos.c.

#define LOBYTE

(

W

)

((W) & 0xFF)

Definition at line 483 of file jmemdos.c.

#define ODD

(

X

)

(((X) & 1L) != 0)

Definition at line 325 of file jmemdos.c.

#define READ_BINARY   "rb"

Definition at line 77 of file jmemdos.c.

#define SRC_HANDLE

(

spec

)

FIELD_AT(spec,5,EMSH)

Definition at line 470 of file jmemdos.c.

#define SRC_OFFSET

(

spec

)

FIELD_AT(spec,7,unsigned short)

Definition at line 471 of file jmemdos.c.

#define SRC_PAGE

(

spec

)

FIELD_AT(spec,9,unsigned short)

Definition at line 472 of file jmemdos.c.

#define SRC_PTR

(

spec

)

FIELD_AT(spec,7,EMSPTR)

Definition at line 473 of file jmemdos.c.

#define SRC_TYPE

(

spec

)

FIELD_AT(spec,4,char)

Definition at line 469 of file jmemdos.c.

#define XMS_SUPPORTED   1

Definition at line 35 of file jmemdos.c.

Typedef Documentation

typedef void far* EMSPTR

Definition at line 460 of file jmemdos.c.

Function Documentation

METHODDEF void close_ems_store	(	j_common_ptr	cinfo,
		backing_store_ptr	info
	)

Definition at line 537 of file jmemdos.c.

METHODDEF void close_file_store	(	j_common_ptr	cinfo,
		backing_store_ptr	info
	)

Definition at line 271 of file jmemdos.c.

METHODDEF void close_xms_store	(	j_common_ptr	cinfo,
		backing_store_ptr	info
	)

Definition at line 397 of file jmemdos.c.

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

Definition at line 185 of file jmemdos.c.

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

Definition at line 168 of file jmemdos.c.

GLOBAL void FAR* jpeg_get_large	(	j_common_ptr	cinfo,
		size_t	sizeofobject
	)

Definition at line 179 of file jmemdos.c.

GLOBAL void* jpeg_get_small	(	j_common_ptr	cinfo,
		size_t	sizeofobject
	)

Definition at line 162 of file jmemdos.c.

GLOBAL long jpeg_mem_available	(	j_common_ptr	cinfo,
		long	min_bytes_needed,
		long	max_bytes_needed,
		long	already_allocated
	)

Definition at line 204 of file jmemdos.c.

GLOBAL long jpeg_mem_init

(

j_common_ptr

cinfo

)

Definition at line 619 of file jmemdos.c.

GLOBAL void jpeg_mem_term

(

j_common_ptr

cinfo

)

Definition at line 626 of file jmemdos.c.

GLOBAL void jpeg_open_backing_store	(	j_common_ptr	cinfo,
		backing_store_ptr	info,
		long	total_bytes_needed
	)

Definition at line 595 of file jmemdos.c.

EXTERN short far jdos_open JPP

(

(short far *handle, char far *filename)

)

EXTERN short far jdos_close JPP

(

(short handle)

)

EXTERN short far jdos_seek JPP

(

(short handle, long offset)

)

EXTERN short far jdos_write JPP

(

(short handle, void far *buffer, unsigned short count)

)

EXTERN void far jxms_getdriver JPP

(

(XMSDRIVER far *)

)

EXTERN void far jxms_calldriver JPP

(

(XMSDRIVER, XMScontext far *)

)

EXTERN short far jems_available JPP

(

(void)

)

EXTERN void far jems_calldriver JPP

(

(EMScontext far *)

)

LOCAL boolean open_ems_store	(	j_common_ptr	cinfo,
		backing_store_ptr	info,
		long	total_bytes_needed
	)

Definition at line 550 of file jmemdos.c.

LOCAL boolean open_file_store	(	j_common_ptr	cinfo,
		backing_store_ptr	info,
		long	total_bytes_needed
	)

Definition at line 284 of file jmemdos.c.

LOCAL boolean open_xms_store	(	j_common_ptr	cinfo,
		backing_store_ptr	info,
		long	total_bytes_needed
	)

Definition at line 410 of file jmemdos.c.

METHODDEF void read_ems_store	(	j_common_ptr	cinfo,
		backing_store_ptr	info,
		void FAR *	buffer_address,
		long	file_offset,
		long	byte_count
	)

Definition at line 487 of file jmemdos.c.

METHODDEF void read_file_store	(	j_common_ptr	cinfo,
		backing_store_ptr	info,
		void FAR *	buffer_address,
		long	file_offset,
		long	byte_count
	)

Definition at line 239 of file jmemdos.c.

METHODDEF void read_xms_store	(	j_common_ptr	cinfo,
		backing_store_ptr	info,
		void FAR *	buffer_address,
		long	file_offset,
		long	byte_count
	)

Definition at line 329 of file jmemdos.c.

LOCAL void select_file_name

(

char *

fname

)

Definition at line 124 of file jmemdos.c.

METHODDEF void write_ems_store	(	j_common_ptr	cinfo,
		backing_store_ptr	info,
		void FAR *	buffer_address,
		long	file_offset,
		long	byte_count
	)

Definition at line 512 of file jmemdos.c.

METHODDEF void write_file_store	(	j_common_ptr	cinfo,
		backing_store_ptr	info,
		void FAR *	buffer_address,
		long	file_offset,
		long	byte_count
	)

Definition at line 255 of file jmemdos.c.

METHODDEF void write_xms_store	(	j_common_ptr	cinfo,
		backing_store_ptr	info,
		void FAR *	buffer_address,
		long	file_offset,
		long	byte_count
	)

Definition at line 362 of file jmemdos.c.

Variable Documentation

MAX_ALLOC_CHUNK should be less than typedef void far* XMSDRIVER

Definition at line 93 of file jmemdos.c.