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/* 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, write to the Free
Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "../include/sane/config.h"
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <preferences.h>
#include <sane/sane.h>
#include "../include/sane/sanei.h"
#include "../include/sane/sanei_wire.h"
#include "../include/sane/sanei_codec_ascii.h"
#define POFFSET(field) ((char *) &((Preferences *) 0)->field - (char *) 0)
#define PFIELD(p,offset,type) (*((type *)(((char *)(p)) + (offset))))
Preferences preferences =
{
0, /* no preferred device (must be 0 or malloced!) */
0, /* no default filename */
0, /* advanced user */
1, /* tooltips enabled */
1, /* two column enabled */
10.0, /* length unit */
1, /* preserve_preview */
0, /* preview_own_cmap */
1.0 /* preview_gamma */
};
static void w_string (Wire *w, Preferences *p, long offset);
static void w_double (Wire *w, Preferences *p, long offset);
static void w_int (Wire *w, Preferences *p, long offset);
static struct
{
SANE_String name;
void (*codec) (Wire *w, Preferences *p, long offset);
long offset;
}
desc[] =
{
{"device", w_string, POFFSET(device)},
{"filename", w_string, POFFSET(filename)},
{"advanced", w_int, POFFSET(advanced)},
{"tool-tips", w_int, POFFSET(tooltips_enabled)},
{"twocolumn", w_int, POFFSET(twocolumn_enabled)},
{"length-unit", w_double, POFFSET(length_unit)},
{"preserve-preview", w_int, POFFSET(preserve_preview)},
{"preview-own-cmap", w_int, POFFSET(preview_own_cmap)},
{"preview-gamma", w_double, POFFSET(preview_gamma)},
};
static void
w_string (Wire *w, Preferences *p, long offset)
{
SANE_String string;
if (w->direction == WIRE_ENCODE)
string = PFIELD (p, offset, char *);
sanei_w_string (w, &string);
if (w->direction == WIRE_DECODE)
{
if (w->status == 0)
{
const char **field;
field = &PFIELD (p, offset, const char *);
if (*field)
free ((char *) *field);
*field = string ? strdup (string) : 0;
}
sanei_w_free (w, (WireCodecFunc) sanei_w_string, &string);
}
}
static void
w_double (Wire *w, Preferences *p, long offset)
{
SANE_Word word;
if (w->direction == WIRE_ENCODE)
word = SANE_FIX (PFIELD (p, offset, double));
sanei_w_word (w, &word);
if (w->direction == WIRE_DECODE)
{
if (w->status == 0)
PFIELD (p, offset, double) = SANE_UNFIX (word);
sanei_w_free (w, (WireCodecFunc) sanei_w_word, &word);
}
}
static void
w_int (Wire *w, Preferences *p, long offset)
{
SANE_Word word;
if (w->direction == WIRE_ENCODE)
word = PFIELD (p, offset, int);
sanei_w_word (w, &word);
if (w->direction == WIRE_DECODE)
{
if (w->status == 0)
PFIELD (p, offset, int) = word;
sanei_w_free (w, (WireCodecFunc) sanei_w_word, &word);
}
}
void
preferences_save (int fd)
{
Wire w;
int i;
w.io.fd = fd;
w.io.read = read;
w.io.write = write;
sanei_w_init (&w, sanei_codec_ascii_init);
sanei_w_set_dir (&w, WIRE_ENCODE);
for (i = 0; i < NELEMS (desc); ++i)
{
sanei_w_string (&w, &desc[i].name);
(*desc[i].codec) (&w, &preferences, desc[i].offset);
}
sanei_w_set_dir (&w, WIRE_DECODE); /* flush it out */
}
void
preferences_restore (int fd)
{
SANE_String name;
Wire w;
int i;
w.io.fd = fd;
w.io.read = read;
w.io.write = write;
sanei_w_init (&w, sanei_codec_ascii_init);
sanei_w_set_dir (&w, WIRE_DECODE);
while (1)
{
sanei_w_space (&w, 3);
if (w.status)
return;
sanei_w_string (&w, &name);
if (w.status || !name)
return;
for (i = 0; i < NELEMS (desc); ++i)
{
if (strcmp (name, desc[i].name) == 0)
{
(*desc[i].codec) (&w, &preferences, desc[i].offset);
break;
}
}
}
}
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