diff options
Diffstat (limited to 'sanei/sanei_codec_bin.c')
| -rw-r--r-- | sanei/sanei_codec_bin.c | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/sanei/sanei_codec_bin.c b/sanei/sanei_codec_bin.c new file mode 100644 index 0000000..4347825 --- /dev/null +++ b/sanei/sanei_codec_bin.c @@ -0,0 +1,139 @@ +/* sane - Scanner Access Now Easy. + Copyright (C) 1997 David Mosberger-Tang + This file is part of the SANE 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., 59 Temple Place - Suite 330, Boston, + MA 02111-1307, USA. + + As a special exception, the authors of SANE give permission for + additional uses of the libraries contained in this release of SANE. + + The exception is that, if you link a SANE library with other files + to produce an executable, this does not by itself cause the + resulting executable to be covered by the GNU General Public + License. Your use of that executable is in no way restricted on + account of linking the SANE library code into it. + + This exception does not, however, invalidate any other reasons why + the executable file might be covered by the GNU General Public + License. + + If you submit changes to SANE to the maintainers to be included in + a subsequent release, you agree by submitting the changes that + those changes may be distributed with this exception intact. + + If you write modifications of your own for SANE, it is your choice + whether to permit this exception to apply to your modifications. + If you do not wish that, delete this exception notice. */ + +#include "sane/config.h" + +#include <errno.h> +#include <stdlib.h> +#include <string.h> + +#include <sane/sane.h> +#include "../include/sane/sanei_wire.h" +#include "../include/sane/sanei_codec_bin.h" + +static void +bin_w_byte (Wire *w, void *v) +{ + SANE_Byte *b = v; + + sanei_w_space (w, 1); + if (w->status) + return; + + switch (w->direction) + { + case WIRE_ENCODE: + *w->buffer.curr++ = *b; + break; + + case WIRE_DECODE: + *b = *w->buffer.curr++; + break; + + case WIRE_FREE: + break; + } +} + +static void +bin_w_string (Wire *w, void *v) +{ + SANE_Word len; + SANE_String *s = v; + + if (w->direction != WIRE_DECODE) + { + len = 0; + if (*s) + len = strlen (*s) + 1; + } + sanei_w_array (w, &len, v, w->codec.w_byte, 1); + + if (w->direction == WIRE_DECODE) + { + if (len == 0) + *s = 0; + else if (w->status == 0) + *(*s + len - 1) = '\0'; + } +} + +static void +bin_w_word (Wire *w, void *v) +{ + SANE_Word val, *word = v; + + sanei_w_space (w, 4); + if (w->status) + return; + switch (w->direction) + { + case WIRE_ENCODE: + val = *word; + /* store in bigendian byte-order: */ + w->buffer.curr[0] = (val >> 24) & 0xff; + w->buffer.curr[1] = (val >> 16) & 0xff; + w->buffer.curr[2] = (val >> 8) & 0xff; + w->buffer.curr[3] = (val >> 0) & 0xff; + w->buffer.curr += 4; + break; + + case WIRE_DECODE: + val = ( ((w->buffer.curr[0] & 0xff) << 24) + | ((w->buffer.curr[1] & 0xff) << 16) + | ((w->buffer.curr[2] & 0xff) << 8) + | ((w->buffer.curr[3] & 0xff) << 0)); + *word = val; + w->buffer.curr += 4; + break; + + case WIRE_FREE: + break; + } +} + +void +sanei_codec_bin_init (Wire *w) +{ + w->codec.w_byte = bin_w_byte; + w->codec.w_char = bin_w_byte; + w->codec.w_word = bin_w_word; + w->codec.w_string = bin_w_string; +} |