kopia lustrzana https://gitlab.com/sane-project/backends
138 wiersze
3.5 KiB
C
138 wiersze
3.5 KiB
C
/* 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, see <https://www.gnu.org/licenses/>.
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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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#include "../include/sane/config.h"
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#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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#include "../include/sane/sane.h"
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#include "../include/sane/sanei_wire.h"
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#include "../include/sane/sanei_codec_bin.h"
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static void
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bin_w_byte (Wire *w, void *v)
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{
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SANE_Byte *b = v;
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sanei_w_space (w, 1);
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if (w->status)
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return;
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switch (w->direction)
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{
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case WIRE_ENCODE:
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*w->buffer.curr++ = *b;
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break;
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case WIRE_DECODE:
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*b = *w->buffer.curr++;
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break;
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case WIRE_FREE:
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break;
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}
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}
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static void
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bin_w_string (Wire *w, void *v)
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{
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SANE_Word len;
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SANE_String *s = v;
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if (w->direction != WIRE_DECODE)
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{
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len = 0;
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if (*s)
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len = strlen (*s) + 1;
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}
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sanei_w_array (w, &len, v, w->codec.w_byte, 1);
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if (w->direction == WIRE_DECODE)
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{
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if (len == 0)
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*s = 0;
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else if (w->status == 0)
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*(*s + len - 1) = '\0';
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}
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}
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static void
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bin_w_word (Wire *w, void *v)
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{
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SANE_Word val, *word = v;
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sanei_w_space (w, 4);
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if (w->status)
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return;
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switch (w->direction)
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{
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case WIRE_ENCODE:
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val = *word;
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/* store in bigendian byte-order: */
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w->buffer.curr[0] = (val >> 24) & 0xff;
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w->buffer.curr[1] = (val >> 16) & 0xff;
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w->buffer.curr[2] = (val >> 8) & 0xff;
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w->buffer.curr[3] = (val >> 0) & 0xff;
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w->buffer.curr += 4;
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break;
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case WIRE_DECODE:
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val = ( ((w->buffer.curr[0] & 0xff) << 24)
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| ((w->buffer.curr[1] & 0xff) << 16)
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| ((w->buffer.curr[2] & 0xff) << 8)
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| ((w->buffer.curr[3] & 0xff) << 0));
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*word = val;
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w->buffer.curr += 4;
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break;
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case WIRE_FREE:
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break;
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}
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}
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void
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sanei_codec_bin_init (Wire *w)
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{
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w->codec.w_byte = bin_w_byte;
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w->codec.w_char = bin_w_byte;
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w->codec.w_word = bin_w_word;
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w->codec.w_string = bin_w_string;
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}
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