kopia lustrzana https://gitlab.com/sane-project/backends
133 wiersze
4.5 KiB
C
133 wiersze
4.5 KiB
C
/* sane - Scanner Access Now Easy.
|
|
Copyright (C) 1997 David Mosberger-Tang
|
|
This file is part of the SANE package.
|
|
|
|
SANE is free software; you can redistribute it and/or modify it
|
|
under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
SANE is distributed in the hope that it will be useful, but WITHOUT
|
|
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|
|
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
|
|
License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with sane; see the file COPYING.
|
|
If not, see <https://www.gnu.org/licenses/>.
|
|
|
|
As a special exception, the authors of SANE give permission for
|
|
additional uses of the libraries contained in this release of SANE.
|
|
|
|
The exception is that, if you link a SANE library with other files
|
|
to produce an executable, this does not by itself cause the
|
|
resulting executable to be covered by the GNU General Public
|
|
License. Your use of that executable is in no way restricted on
|
|
account of linking the SANE library code into it.
|
|
|
|
This exception does not, however, invalidate any other reasons why
|
|
the executable file might be covered by the GNU General Public
|
|
License.
|
|
|
|
If you submit changes to SANE to the maintainers to be included in
|
|
a subsequent release, you agree by submitting the changes that
|
|
those changes may be distributed with this exception intact.
|
|
|
|
If you write modifications of your own for SANE, it is your choice
|
|
whether to permit this exception to apply to your modifications.
|
|
If you do not wish that, delete this exception notice.
|
|
|
|
Support routines to translate internal datatypes into a wire-format
|
|
(used for RPCs and to save/restore options). */
|
|
|
|
#ifndef sanei_wire_h
|
|
#define sanei_wire_h
|
|
|
|
#include <sys/types.h>
|
|
|
|
#define MAX_MEM (1024 * 1024)
|
|
|
|
typedef enum
|
|
{
|
|
WIRE_ENCODE = 0,
|
|
WIRE_DECODE,
|
|
WIRE_FREE
|
|
}
|
|
WireDirection;
|
|
|
|
struct Wire;
|
|
|
|
typedef void (*WireCodecFunc) (struct Wire *w, void *val_ptr);
|
|
typedef ssize_t (*WireReadFunc) (int fd, void * buf, size_t len);
|
|
typedef ssize_t (*WireWriteFunc) (int fd, const void * buf, size_t len);
|
|
|
|
typedef struct Wire
|
|
{
|
|
int version; /* protocol version in use */
|
|
WireDirection direction;
|
|
int status;
|
|
int allocated_memory;
|
|
struct
|
|
{
|
|
WireCodecFunc w_byte;
|
|
WireCodecFunc w_char;
|
|
WireCodecFunc w_word;
|
|
WireCodecFunc w_string;
|
|
}
|
|
codec;
|
|
struct
|
|
{
|
|
size_t size;
|
|
char *curr;
|
|
char *start;
|
|
char *end;
|
|
}
|
|
buffer;
|
|
struct
|
|
{
|
|
int fd;
|
|
WireReadFunc read;
|
|
WireWriteFunc write;
|
|
}
|
|
io;
|
|
}
|
|
Wire;
|
|
|
|
extern void sanei_w_init (Wire *w, void (*codec_init)(Wire *));
|
|
extern void sanei_w_exit (Wire *w);
|
|
extern void sanei_w_space (Wire *w, size_t howmuch);
|
|
extern void sanei_w_void (Wire *w, void *);
|
|
extern void sanei_w_byte (Wire *w, SANE_Byte *v);
|
|
extern void sanei_w_char (Wire *w, SANE_Char *v);
|
|
extern void sanei_w_word (Wire *w, SANE_Word *v);
|
|
extern void sanei_w_bool (Wire *w, SANE_Bool *v);
|
|
extern void sanei_w_ptr (Wire *w, void **v, WireCodecFunc w_value,
|
|
size_t value_size);
|
|
extern void sanei_w_string (Wire *w, SANE_String *v);
|
|
extern void sanei_w_status (Wire *w, SANE_Status *v);
|
|
extern void sanei_w_constraint_type (Wire *w, SANE_Constraint_Type *v);
|
|
extern void sanei_w_value_type (Wire *w, SANE_Value_Type *v);
|
|
extern void sanei_w_unit (Wire *w, SANE_Unit *v);
|
|
extern void sanei_w_action (Wire *w, SANE_Action *v);
|
|
extern void sanei_w_frame (Wire *w, SANE_Frame *v);
|
|
extern void sanei_w_range (Wire *w, SANE_Range *v);
|
|
extern void sanei_w_range_ptr (Wire *w, SANE_Range **v);
|
|
extern void sanei_w_device (Wire *w, SANE_Device *v);
|
|
extern void sanei_w_device_ptr (Wire *w, SANE_Device **v);
|
|
extern void sanei_w_option_descriptor (Wire *w, SANE_Option_Descriptor *v);
|
|
extern void sanei_w_option_descriptor_ptr (Wire *w,
|
|
SANE_Option_Descriptor **v);
|
|
extern void sanei_w_parameters (Wire *w, SANE_Parameters *v);
|
|
|
|
extern void sanei_w_array (Wire *w, SANE_Word *len, void **v,
|
|
WireCodecFunc w_element, size_t element_size);
|
|
|
|
extern void sanei_w_set_dir (Wire *w, WireDirection dir);
|
|
extern void sanei_w_call (Wire *w, SANE_Word proc_num,
|
|
WireCodecFunc w_arg, void *arg,
|
|
WireCodecFunc w_reply, void *reply);
|
|
extern void sanei_w_reply (Wire *w, WireCodecFunc w_reply, void *reply);
|
|
extern void sanei_w_free (Wire *w, WireCodecFunc w_reply, void *reply);
|
|
|
|
#endif /* sanei_wire_h */
|