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+/* xsane -- a graphical (X11, gtk) scanner-oriented SANE frontend
+
+ xsane-rc-io.h
+
+ Oliver Rauch <Oliver.Rauch@Wolfsburg.DE>
+ Copyright (C) 1998-2000 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_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, void **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 */