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/* xsane -- a graphical (X11, gtk) scanner-oriented SANE frontend
xsane-rc-io.h
Oliver Rauch <Oliver.Rauch@rauch-domain.de>
Copyright (C) 1998-2007 Oliver Rauch
This file is part of the XSANE package.
This program 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.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
/* ---------------------------------------------------------------------------------------------------------------- */
#ifndef xsane_rc_io_h
#define xsane_rc_io_h
#include <sys/types.h>
/* ---------------------------------------------------------------------------------------------------------------------- */
#define XSANE_EOF -1
/* ---------------------------------------------------------------------------------------------------------------- */
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;
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 xsane_rc_io_w_init(Wire *w);
extern void xsane_rc_io_w_exit(Wire *w);
extern void xsane_rc_io_w_space(Wire *w, size_t howmuch);
extern void xsane_rc_io_w_skip_newline(Wire *w);
extern void xsane_rc_io_w_void(Wire *w);
extern void xsane_rc_io_w_byte(Wire *w, SANE_Byte *v);
extern void xsane_rc_io_w_char(Wire *w, SANE_Char *v);
extern void xsane_rc_io_w_word(Wire *w, SANE_Word *v);
extern void xsane_rc_io_w_string(Wire *w, SANE_String *v);
extern void xsane_rc_io_w_status(Wire *w, SANE_Status *v);
extern void xsane_rc_io_w_constraint_type(Wire *w, SANE_Constraint_Type *v);
extern void xsane_rc_io_w_value_type(Wire *w, SANE_Value_Type *v);
extern void xsane_rc_io_w_unit(Wire *w, SANE_Unit *v);
extern void xsane_rc_io_w_action(Wire *w, SANE_Action *v);
extern void xsane_rc_io_w_frame(Wire *w, SANE_Frame *v);
extern void xsane_rc_io_w_range(Wire *w, SANE_Range *v);
extern void xsane_rc_io_w_range_ptr(Wire *w, SANE_Range **v);
extern void xsane_rc_io_w_device(Wire *w, SANE_Device *v);
extern void xsane_rc_io_w_device_ptr(Wire *w, SANE_Device **v);
extern void xsane_rc_io_w_option_descriptor(Wire *w, SANE_Option_Descriptor *v);
extern void xsane_rc_io_w_option_descriptor_ptr(Wire *w, SANE_Option_Descriptor **v);
extern void xsane_rc_io_w_parameters(Wire *w, SANE_Parameters *v);
extern void xsane_rc_io_w_array(Wire *w, SANE_Word *len, char **v, WireCodecFunc w_element, size_t element_size);
extern void xsane_rc_io_w_flush(Wire *w);
extern void xsane_rc_io_w_set_dir(Wire *w, WireDirection dir);
extern void xsane_rc_io_w_call(Wire *w, SANE_Word proc_num, WireCodecFunc w_arg, void *arg, WireCodecFunc w_reply, void *reply);
extern void xsane_rc_io_w_reply(Wire *w, WireCodecFunc w_reply, void *reply);
extern void xsane_rc_io_w_free(Wire *w, WireCodecFunc w_reply, void *reply);
extern void xsane_rc_pref_string(Wire *w, void *p, long offset);
extern void xsane_rc_pref_double(Wire *w, void *p, long offset);
extern void xsane_rc_pref_int(Wire *w, void *p, long offset);
/* ---------------------------------------------------------------------------------------------------------------- */
#endif /* xsane_rc_io_wire_h */
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