1999-08-09 18:06:01 +00:00
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/* sane - Scanner Access Now Easy.
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Copyright (C) 1997 David Mosberger-Tang
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This file is part of the SANE package.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston,
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MA 02111-1307, USA.
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As a special exception, the authors of SANE give permission for
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additional uses of the libraries contained in this release of SANE.
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The exception is that, if you link a SANE library with other files
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to produce an executable, this does not by itself cause the
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resulting executable to be covered by the GNU General Public
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License. Your use of that executable is in no way restricted on
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account of linking the SANE library code into it.
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This exception does not, however, invalidate any other reasons why
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the executable file might be covered by the GNU General Public
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License.
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If you submit changes to SANE to the maintainers to be included in
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a subsequent release, you agree by submitting the changes that
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those changes may be distributed with this exception intact.
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If you write modifications of your own for SANE, it is your choice
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whether to permit this exception to apply to your modifications.
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If you do not wish that, delete this exception notice. */
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2000-08-12 15:11:46 +00:00
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#include "sane/config.h"
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1999-08-09 18:06:01 +00:00
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#include <stdlib.h>
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#include <unistd.h>
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#include <errno.h>
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#ifdef HAVE_LIBC_H
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# include <libc.h> /* NeXTStep/OpenStep */
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#endif
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2000-08-12 15:11:46 +00:00
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#include "sane/sane.h"
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2001-02-22 09:48:17 +00:00
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#include "sane/sanei.h"
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2000-08-12 15:11:46 +00:00
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#include "sane/sanei_wire.h"
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#include "sane/sanei_codec_ascii.h"
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1999-08-09 18:06:01 +00:00
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int
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sanei_save_values (int fd, SANE_Handle device)
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{
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const SANE_Option_Descriptor *opt;
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size_t word_array_size = 0;
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SANE_Word *word_array = 0;
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size_t str_size = 0;
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SANE_String str = 0;
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SANE_Word word;
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Wire w;
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int i;
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w.io.fd = fd;
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w.io.read = read;
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w.io.write = write;
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sanei_w_init (&w, sanei_codec_ascii_init);
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sanei_w_set_dir (&w, WIRE_ENCODE);
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for (i = 0; (opt = sane_get_option_descriptor (device, i)); ++i)
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{
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if ((opt->cap & (SANE_CAP_SOFT_SELECT | SANE_CAP_SOFT_DETECT))
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!= (SANE_CAP_SOFT_SELECT | SANE_CAP_SOFT_DETECT)
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|| !opt->name)
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/* if we can't query AND set the option, don't bother saving it */
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continue;
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switch (opt->type)
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{
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case SANE_TYPE_BOOL:
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case SANE_TYPE_INT:
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case SANE_TYPE_FIXED:
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if (opt->size == sizeof (SANE_Word))
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{
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if (sane_control_option (device, i, SANE_ACTION_GET_VALUE,
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&word, 0)
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!= SANE_STATUS_GOOD)
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continue;
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sanei_w_string (&w, (SANE_String *) &opt->name);
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sanei_w_word (&w, &word);
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}
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else
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{
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SANE_Int len = opt->size / sizeof (SANE_Word);
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if (opt->size > word_array_size)
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{
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word_array_size =
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((opt->size + 32*sizeof (SANE_Word))
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& ~(32*sizeof (SANE_Word) - 1));
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if (word_array)
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word_array = realloc (word_array, word_array_size);
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else
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word_array = malloc (word_array_size);
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if (word_array == 0)
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{
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/* Malloc failed, so return an error. */
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w.status = ENOMEM;
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return 1;
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}
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}
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if (sane_control_option (device, i, SANE_ACTION_GET_VALUE,
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word_array, 0)
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!= SANE_STATUS_GOOD)
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continue;
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sanei_w_string (&w, (SANE_String *) &opt->name);
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sanei_w_array (&w, &len, (void **) &word_array,
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(WireCodecFunc) sanei_w_word, sizeof (SANE_Word));
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}
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break;
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case SANE_TYPE_STRING:
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if (opt->size > str_size)
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{
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str_size = (opt->size + 1024) & ~1023;
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if (str)
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str = realloc (str, str_size);
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else
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str = malloc (str_size);
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if (str == 0)
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{
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/* Malloc failed, so return an error. */
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w.status = ENOMEM;
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return 1;
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}
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}
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if (sane_control_option (device, i, SANE_ACTION_GET_VALUE, str, 0)
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!= SANE_STATUS_GOOD)
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continue;
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sanei_w_string (&w, (SANE_String *) &opt->name);
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sanei_w_string (&w, &str);
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break;
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case SANE_TYPE_BUTTON:
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case SANE_TYPE_GROUP:
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break;
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}
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}
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sanei_w_set_dir (&w, WIRE_DECODE);
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if (word_array)
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free (word_array);
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if (str)
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free (str);
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return 0;
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}
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