diff options
author | Jörg Frings-Fürst <debian@jff-webhosting.net> | 2014-12-02 20:17:04 +0100 |
---|---|---|
committer | Jörg Frings-Fürst <debian@jff-webhosting.net> | 2014-12-02 20:17:04 +0100 |
commit | 7d8191b83e163d76bb05e13b373638e4eeb7da95 (patch) | |
tree | fe29c36a3cb4ef2267b2253da4dde8ce360b3cb5 /include/sane/sanei_wire.h |
Initial import of sane-frontends version 1.0.14-9
Diffstat (limited to 'include/sane/sanei_wire.h')
-rw-r--r-- | include/sane/sanei_wire.h | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/include/sane/sanei_wire.h b/include/sane/sanei_wire.h new file mode 100644 index 0000000..95be5cf --- /dev/null +++ b/include/sane/sanei_wire.h @@ -0,0 +1,132 @@ +/* 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. + + 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. + + Support routines to translate internal datatypes into a wire-format + (used for RPCs and to save/restore options). */ + +#ifndef sanei_wire_h +#define sanei_wire_h + +#include <sys/types.h> + +#define MAX_MEM (1024 * 1024) + +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; + int allocated_memory; + 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 sanei_w_init (Wire *w, void (*codec_init)(Wire *)); +extern void sanei_w_exit (Wire *w); +extern void sanei_w_space (Wire *w, size_t howmuch); +extern void sanei_w_void (Wire *w); +extern void sanei_w_byte (Wire *w, SANE_Byte *v); +extern void sanei_w_char (Wire *w, SANE_Char *v); +extern void sanei_w_word (Wire *w, SANE_Word *v); +extern void sanei_w_bool (Wire *w, SANE_Bool *v); +extern void sanei_w_ptr (Wire *w, void **v, WireCodecFunc w_value, + size_t value_size); +extern void sanei_w_string (Wire *w, SANE_String *v); +extern void sanei_w_status (Wire *w, SANE_Status *v); +extern void sanei_w_constraint_type (Wire *w, SANE_Constraint_Type *v); +extern void sanei_w_value_type (Wire *w, SANE_Value_Type *v); +extern void sanei_w_unit (Wire *w, SANE_Unit *v); +extern void sanei_w_action (Wire *w, SANE_Action *v); +extern void sanei_w_frame (Wire *w, SANE_Frame *v); +extern void sanei_w_range (Wire *w, SANE_Range *v); +extern void sanei_w_range_ptr (Wire *w, SANE_Range **v); +extern void sanei_w_device (Wire *w, SANE_Device *v); +extern void sanei_w_device_ptr (Wire *w, SANE_Device **v); +extern void sanei_w_option_descriptor (Wire *w, SANE_Option_Descriptor *v); +extern void sanei_w_option_descriptor_ptr (Wire *w, + SANE_Option_Descriptor **v); +extern void sanei_w_parameters (Wire *w, SANE_Parameters *v); + +extern void sanei_w_array (Wire *w, SANE_Word *len, void **v, + WireCodecFunc w_element, size_t element_size); + +extern void sanei_w_set_dir (Wire *w, WireDirection dir); +extern void sanei_w_call (Wire *w, SANE_Word proc_num, + WireCodecFunc w_arg, void *arg, + WireCodecFunc w_reply, void *reply); +extern void sanei_w_reply (Wire *w, WireCodecFunc w_reply, void *reply); +extern void sanei_w_free (Wire *w, WireCodecFunc w_reply, void *reply); + +#endif /* sanei_wire_h */ |