jmemdos.c File Reference

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

Go to the source code of this file.

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

Variables
You forgot to define USE_MSDOS_MEMMGR in jconfig h MAX_ALLOC_CHUNK should be less than typedef void far *	XMSDRIVER

Macro Definition Documentation

DEFAULT_MAX_MEM

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

Definition at line 204 of file jmemdos.c.

DST_HANDLE

#define DST_HANDLE

(

spec

)

FIELD_AT(spec,12,EMSH)

Definition at line 479 of file jmemdos.c.

Referenced by read_ems_store(), and write_ems_store().

DST_OFFSET

#define DST_OFFSET

(

spec

)

FIELD_AT(spec,14,unsigned short)

Definition at line 480 of file jmemdos.c.

Referenced by write_ems_store().

DST_PAGE

#define DST_PAGE

(

spec

)

FIELD_AT(spec,16,unsigned short)

Definition at line 481 of file jmemdos.c.

Referenced by write_ems_store().

DST_PTR

#define DST_PTR

(

spec

)

FIELD_AT(spec,14,EMSPTR)

Definition at line 482 of file jmemdos.c.

Referenced by read_ems_store().

DST_TYPE

#define DST_TYPE

(

spec

)

FIELD_AT(spec,11,char)

Definition at line 478 of file jmemdos.c.

Referenced by read_ems_store(), and write_ems_store().

EMS_SUPPORTED

#define EMS_SUPPORTED   1

Definition at line 38 of file jmemdos.c.

EMSPAGESIZE

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

Definition at line 484 of file jmemdos.c.

Referenced by open_ems_store(), read_ems_store(), and write_ems_store().

far_free

#define far_free

(

x

)

free(x)

Definition at line 70 of file jmemdos.c.

Referenced by jpeg_free_large().

far_malloc

#define far_malloc

(

x

)

malloc(x)

Definition at line 69 of file jmemdos.c.

Referenced by jpeg_get_large().

FIELD_AT

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

Definition at line 472 of file jmemdos.c.

HIBYTE

#define HIBYTE

(

W

)

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

Definition at line 486 of file jmemdos.c.

Referenced by open_ems_store(), read_ems_store(), and write_ems_store().

JPEG_INTERNALS

#define JPEG_INTERNALS

Definition at line 42 of file jmemdos.c.

LOBYTE

#define LOBYTE

(

W

)

((W) & 0xFF)

Definition at line 487 of file jmemdos.c.

Referenced by open_ems_store().

ODD

#define ODD

(

X

)

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

Definition at line 329 of file jmemdos.c.

READ_BINARY

#define READ_BINARY   "rb"

Definition at line 77 of file jmemdos.c.

Referenced by select_file_name().

SRC_HANDLE

#define SRC_HANDLE

(

spec

)

FIELD_AT(spec,5,EMSH)

Definition at line 474 of file jmemdos.c.

Referenced by read_ems_store(), and write_ems_store().

SRC_OFFSET

#define SRC_OFFSET

(

spec

)

FIELD_AT(spec,7,unsigned short)

Definition at line 475 of file jmemdos.c.

Referenced by read_ems_store().

SRC_PAGE

#define SRC_PAGE

(

spec

)

FIELD_AT(spec,9,unsigned short)

Definition at line 476 of file jmemdos.c.

Referenced by read_ems_store().

SRC_PTR

#define SRC_PTR

(

spec

)

FIELD_AT(spec,7,EMSPTR)

Definition at line 477 of file jmemdos.c.

Referenced by write_ems_store().

SRC_TYPE

#define SRC_TYPE

(

spec

)

FIELD_AT(spec,4,char)

Definition at line 473 of file jmemdos.c.

Referenced by read_ems_store(), and write_ems_store().

XMS_SUPPORTED

#define XMS_SUPPORTED   1

Definition at line 35 of file jmemdos.c.

Typedef Documentation

EMSPTR

typedef void far* EMSPTR

Definition at line 464 of file jmemdos.c.

Function Documentation

close_ems_store()

close_ems_store	(	j_common_ptr	cinfo,
		backing_store_ptr	info
	)

Definition at line 541 of file jmemdos.c.

References info, LOCAL, and TRACEMS1.

Referenced by open_ems_store().

close_file_store()

close_file_store	(	j_common_ptr	cinfo,
		backing_store_ptr	info
	)

Definition at line 275 of file jmemdos.c.

References info, LOCAL, backing_store_struct::temp_name, and TRACEMSS.

Referenced by open_file_store().

close_xms_store()

close_xms_store	(	j_common_ptr	cinfo,
		backing_store_ptr	info
	)

Definition at line 401 of file jmemdos.c.

References info.

jpeg_free_large()

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

Definition at line 189 of file jmemdos.c.

References far_free.

jpeg_free_small()

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

Definition at line 172 of file jmemdos.c.

References FAR, free(), and GLOBAL.

jpeg_get_large()

jpeg_get_large	(	j_common_ptr	cinfo,
		size_t	sizeofobject
	)

Definition at line 183 of file jmemdos.c.

References FAR, far_malloc, GLOBAL, and sizeofobject.

jpeg_get_small()

jpeg_get_small	(	j_common_ptr	cinfo,
		size_t	sizeofobject
	)

Definition at line 166 of file jmemdos.c.

References GLOBAL, and malloc().

jpeg_mem_available()

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

Definition at line 208 of file jmemdos.c.

References already_allocated, and METHODDEF.

jpeg_mem_init()

jpeg_mem_init

(

j_common_ptr

cinfo

)

Definition at line 623 of file jmemdos.c.

jpeg_mem_term()

jpeg_mem_term

(

j_common_ptr

cinfo

)

Definition at line 630 of file jmemdos.c.

jpeg_open_backing_store()

jpeg_open_backing_store	(	j_common_ptr	cinfo,
		backing_store_ptr	info,
		long	total_bytes_needed
	)

Definition at line 599 of file jmemdos.c.

References ERREXITS, GLOBAL, info, open_ems_store(), open_file_store(), open_xms_store(), and total_bytes_needed.

JPP() [1/8]

short far jdos_open JPP

(

(short far *handle, char far *filename)

)

JPP() [2/8]

short far jdos_close JPP

(

(short handle)

)

JPP() [3/8]

short far jdos_seek JPP

(

(short handle, long offset)

)

JPP() [4/8]

short far jdos_write JPP

(

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

)

JPP() [5/8]

void far jxms_getdriver JPP

(

(XMSDRIVER far *)

)

JPP() [6/8]

void far jxms_calldriver JPP

(

(XMSDRIVER, XMScontext far *)

)

JPP() [7/8]

short far jems_available JPP

(

(void)

)

JPP() [8/8]

void far jems_calldriver JPP

(

(EMScontext far *)

)

open_ems_store()

open_ems_store	(	j_common_ptr	cinfo,
		backing_store_ptr	info,
		long	total_bytes_needed
	)

Definition at line 554 of file jmemdos.c.

References close_ems_store(), EMSPAGESIZE, FALSE, GLOBAL, HIBYTE, info, LOBYTE, read_ems_store(), total_bytes_needed, TRACEMS1, TRUE, and write_ems_store().

Referenced by jpeg_open_backing_store().

open_file_store()

open_file_store	(	j_common_ptr	cinfo,
		backing_store_ptr	info,
		long	total_bytes_needed
	)

Definition at line 288 of file jmemdos.c.

References close_file_store(), ERREXITS, FALSE, info, read_file_store(), select_file_name(), backing_store_struct::temp_name, TRACEMSS, TRUE, write_file_store(), and XMSDRIVER.

Referenced by jpeg_open_backing_store().

open_xms_store()

open_xms_store	(	j_common_ptr	cinfo,
		backing_store_ptr	info,
		long	total_bytes_needed
	)

Definition at line 414 of file jmemdos.c.

References XMSDRIVER.

Referenced by jpeg_open_backing_store().

read_ems_store()

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

Definition at line 491 of file jmemdos.c.

References DST_HANDLE, DST_PTR, DST_TYPE, EMSPAGESIZE, ERREXIT, HIBYTE, METHODDEF, SRC_HANDLE, SRC_OFFSET, SRC_PAGE, and SRC_TYPE.

Referenced by open_ems_store().

read_file_store()

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

Definition at line 243 of file jmemdos.c.

References ERREXIT, info, and METHODDEF.

Referenced by open_file_store().

read_xms_store()

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

Definition at line 333 of file jmemdos.c.

select_file_name()

select_file_name

(

char *

fname

)

Definition at line 128 of file jmemdos.c.

References GLOBAL, NULL, ptr, and READ_BINARY.

Referenced by open_file_store().

write_ems_store()

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

Definition at line 516 of file jmemdos.c.

References DST_HANDLE, DST_OFFSET, DST_PAGE, DST_TYPE, EMSPAGESIZE, ERREXIT, HIBYTE, info, METHODDEF, SRC_HANDLE, SRC_PTR, and SRC_TYPE.

Referenced by open_ems_store().

write_file_store()

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

Definition at line 259 of file jmemdos.c.

References ERREXIT, info, and METHODDEF.

Referenced by open_file_store().

write_xms_store()

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

Definition at line 366 of file jmemdos.c.

References info.

Variable Documentation

XMSDRIVER

You forgot to define USE_MSDOS_MEMMGR in jconfig h MAX_ALLOC_CHUNK should be less than typedef void far* XMSDRIVER

Definition at line 97 of file jmemdos.c.

Referenced by open_file_store(), and open_xms_store().