From 7d8191b83e163d76bb05e13b373638e4eeb7da95 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?J=C3=B6rg=20Frings-F=C3=BCrst?= Date: Tue, 2 Dec 2014 20:17:04 +0100 Subject: Initial import of sane-frontends version 1.0.14-9 --- sanei/sanei_wire.c | 694 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 694 insertions(+) create mode 100644 sanei/sanei_wire.c (limited to 'sanei/sanei_wire.c') diff --git a/sanei/sanei_wire.c b/sanei/sanei_wire.c new file mode 100644 index 0000000..7f56639 --- /dev/null +++ b/sanei/sanei_wire.c @@ -0,0 +1,694 @@ +/* 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 +#include +#include + +#include + +#include +#include "../include/sane/sanei_wire.h" + +#define BACKEND_NAME sanei_wire +#include "../include/sane/sanei_debug.h" + +void +sanei_w_space (Wire * w, size_t howmuch) +{ + size_t nbytes, left_over; + int fd = w->io.fd; + ssize_t nread, nwritten; + + DBG (3, "sanei_w_space: %lu bytes for wire %d\n", (u_long) howmuch, fd); + + if (howmuch > w->buffer.size) + DBG (2, "sanei_w_space: bigger than buffer (%lu bytes), " + "may be flush()\n", (u_long) w->buffer.size); + + if (w->status != 0) + { + DBG (1, "sanei_w_space: wire is in invalid state %d\n", + w->status); + return; + } + + if (w->buffer.curr + howmuch > w->buffer.end) + { + DBG (4, "sanei_w_space: free buffer size is %lu\n", + (u_long) (w->buffer.end - w->buffer.curr)); + switch (w->direction) + { + case WIRE_ENCODE: + nbytes = w->buffer.curr - w->buffer.start; + w->buffer.curr = w->buffer.start; + DBG (4, "sanei_w_space: ENCODE: sending %lu bytes\n", + (u_long) nbytes); + while (nbytes > 0) + { + nwritten = (*w->io.write) (fd, w->buffer.curr, nbytes); + if (nwritten < 0) + { + DBG (1, "sanei_w_space: ENCODE: write failed (%d)\n", errno); + w->status = errno; + return; + } + w->buffer.curr += nwritten; + nbytes -= nwritten; + } + w->buffer.curr = w->buffer.start; + w->buffer.end = w->buffer.start + w->buffer.size; + DBG (4, "sanei_w_space: ENCODE: free buffer is now %lu\n", + (u_long) w->buffer.size); + break; + + case WIRE_DECODE: + left_over = w->buffer.end - w->buffer.curr; + + if ((signed) left_over < 0) + { + DBG (1, "sanei_w_space: DECODE: buffer underflow\n"); + return; + } + + if (left_over) + { + DBG (4, "sanei_w_space: DECODE: %lu bytes left in buffer\n", + (u_long) left_over); + memmove (w->buffer.start, w->buffer.curr, left_over); + } + w->buffer.curr = w->buffer.start; + w->buffer.end = w->buffer.start + left_over; + + DBG (4, "sanei_w_space: DECODE: receiving data\n"); + do + { + nread = (*w->io.read) (fd, w->buffer.end, + w->buffer.size - left_over); + if (nread <= 0) + { + DBG (2, "sanei_w_space: DECODE: no data received (%d)\n", + errno); + if (nread == 0) + errno = EINVAL; + w->status = errno; + return; + } + left_over += nread; + w->buffer.end += nread; + } + while (left_over < howmuch); + DBG (4, "sanei_w_space: DECODE: %lu bytes read\n", + (u_long) (w->buffer.end - w->buffer.start)); + break; + + case WIRE_FREE: + DBG (4, "sanei_w_space: FREE: doing nothing for free operation\n"); + break; + } + } + DBG (4, "sanei_w_space: done\n"); +} + +void +sanei_w_void (Wire * w) +{ + DBG (3, "sanei_w_void: wire %d (void debug output)\n", w->io.fd); +} + +void +sanei_w_array (Wire * w, SANE_Word * len_ptr, void **v, + WireCodecFunc w_element, size_t element_size) +{ + SANE_Word len; + char *val; + int i; + + DBG (3, "sanei_w_array: wire %d, elements of size %lu\n", w->io.fd, + (u_long) element_size); + + if (w->direction == WIRE_FREE) + { + if (*len_ptr && *v) + { + DBG (4, "sanei_w_array: FREE: freeing array (%d elements)\n", + *len_ptr); + val = *v; + for (i = 0; i < *len_ptr; ++i) + { + (*w_element) (w, val); + val += element_size; + } + free (*v); + w->allocated_memory -= (*len_ptr * element_size); + } + else + DBG (1, "sanei_w_array: FREE: tried to free array but *len_ptr or *v " + "was NULL\n"); + + DBG (4, "sanei_w_array: FREE: done\n"); + return; + } + + if (w->direction == WIRE_ENCODE) + len = *len_ptr; + DBG (4, "sanei_w_array: send/receive array length\n"); + sanei_w_word (w, &len); + + if (w->status) + { + DBG (1, "sanei_w_array: bad status: %d\n", w->status); + return; + } + DBG (4, "sanei_w_array: array has %d elements\n", len); + + if (w->direction == WIRE_DECODE) + { + *len_ptr = len; + if (len) + { + if (((unsigned int) len) > MAX_MEM + || ((unsigned int) len * element_size) > MAX_MEM + || (w->allocated_memory + len * element_size) > MAX_MEM) + { + DBG (0, "sanei_w_array: DECODE: maximum amount of allocated memory " + "exceeded (limit: %u, new allocation: %u, total: %u bytes)\n", + MAX_MEM, len * element_size, MAX_MEM + len * element_size); + w->status = ENOMEM; + return; + } + *v = malloc (len * element_size); + if (*v == 0) + { + /* Malloc failed, so return an error. */ + DBG (1, "sanei_w_array: DECODE: not enough free memory\n"); + w->status = ENOMEM; + return; + } + memset (*v, 0, len * element_size); + w->allocated_memory += (len * element_size); + } + else + *v = 0; + } + + val = *v; + DBG (4, "sanei_w_array: transferring array elements\n"); + for (i = 0; i < len; ++i) + { + (*w_element) (w, val); + val += element_size; + if (w->status) + { + DBG (1, "sanei_w_array: bad status: %d\n", w->status); + return; + } + } + DBG (4, "sanei_w_array: done\n"); +} + +void +sanei_w_ptr (Wire * w, void **v, WireCodecFunc w_value, size_t value_size) +{ + SANE_Word is_null; + + DBG (3, "sanei_w_ptr: wire %d, value pointer at is %lu bytes\n", w->io.fd, + (u_long) value_size); + + if (w->direction == WIRE_FREE) + { + if (*v && value_size) + { + DBG (4, "sanei_w_ptr: FREE: freeing value\n"); + (*w_value) (w, *v); + free (*v); + w->allocated_memory -= value_size; + } + else + DBG (1, "sanei_w_ptr: FREE: tried to free value but *v or value_size " + "was NULL\n"); + + DBG (4, "sanei_w_ptr: FREE: done\n"); + return; + } + if (w->direction == WIRE_ENCODE) + is_null = (*v == 0); + + DBG (4, "sanei_w_ptr: send/receive is_null\n"); + sanei_w_word (w, &is_null); + if (w->status) + { + DBG (1, "sanei_w_ptr: bad status: %d\n", w->status); + return; + } + + if (!is_null) + { + if (w->direction == WIRE_DECODE) + { + DBG (4, "sanei_w_ptr: DECODE: receive data pointed at\n"); + if (value_size > MAX_MEM) + { + DBG (0, "sanei_w_ptr: DECODE: maximum amount of allocated memory " + "exceeded (limit: %u, new allocation: %u, total: %u bytes)\n", + MAX_MEM, value_size, (w->allocated_memory + value_size)); + w->status = ENOMEM; + return; + } + + *v = malloc (value_size); + if (*v == 0) + { + /* Malloc failed, so return an error. */ + DBG (1, "sanei_w_ptr: DECODE: not enough free memory\n"); + w->status = ENOMEM; + return; + } + w->allocated_memory += value_size; + memset (*v, 0, value_size); + } + (*w_value) (w, *v); + } + else if (w->direction == WIRE_DECODE) + *v = 0; + + DBG (4, "sanei_w_ptr: done\n"); +} + +void +sanei_w_byte (Wire * w, SANE_Byte * v) +{ + DBG (3, "sanei_w_byte: wire %d\n", w->io.fd); + (*w->codec.w_byte) (w, v); + if (w->direction != WIRE_FREE) + DBG (4, "sanei_w_byte: value = %d\n", *v); +} + +void +sanei_w_char (Wire * w, SANE_Char * v) +{ + DBG (3, "sanei_w_char: wire %d\n", w->io.fd); + (*w->codec.w_char) (w, v); + if (w->direction != WIRE_FREE) + DBG (4, "sanei_w_char: value = %d\n", *v); +} + +void +sanei_w_word (Wire * w, SANE_Word * v) +{ + DBG (3, "sanei_w_word: wire %d\n", w->io.fd); + (*w->codec.w_word) (w, v); + if (w->direction != WIRE_FREE) + DBG (4, "sanei_w_word: value = %d\n", *v); +} + +void +sanei_w_string (Wire * w, SANE_String * v) +{ + DBG (3, "sanei_w_string: wire %d\n", w->io.fd); + (*w->codec.w_string) (w, v); + if (w->direction != WIRE_FREE && w->status == 0) + DBG (4, "sanei_w_string: value = %s\n", *v); +} + +void +sanei_w_status (Wire * w, SANE_Status * v) +{ + SANE_Word word = *v; + + DBG (3, "sanei_w_status: wire %d\n", w->io.fd); + + sanei_w_word (w, &word); + if (w->direction == WIRE_DECODE) + *v = word; + + if (w->direction != WIRE_FREE) + DBG (4, "sanei_w_status: value = %d\n", word); +} + +void +sanei_w_bool (Wire * w, SANE_Bool * v) +{ + SANE_Word word = *v; + + DBG (3, "sanei_w_bool: wire %d\n", w->io.fd); + sanei_w_word (w, &word); + if (w->direction == WIRE_DECODE) + *v = word; + + if (w->direction != WIRE_FREE) + DBG (4, "sanei_w_bool: value = %s\n", + ((word == SANE_TRUE) ? ("true") : ("false"))); +} + +void +sanei_w_constraint_type (Wire * w, SANE_Constraint_Type * v) +{ + SANE_Word word = *v; + + DBG (3, "sanei_w_constraint_type: wire %d\n", w->io.fd); + + sanei_w_word (w, &word); + if (w->direction == WIRE_DECODE) + *v = word; + + if (w->direction != WIRE_FREE) + DBG (4, "sanei_w_constraint_type: value = %d\n", word); +} + +void +sanei_w_value_type (Wire * w, SANE_Value_Type * v) +{ + SANE_Word word = *v; + + DBG (3, "sanei_w_value_type: wire %d\n", w->io.fd); + + sanei_w_word (w, &word); + if (w->direction == WIRE_DECODE) + *v = word; + if (w->direction != WIRE_FREE) + DBG (4, "sanei_w_value_type: value = %d\n", word); +} + +void +sanei_w_unit (Wire * w, SANE_Unit * v) +{ + SANE_Word word = *v; + + DBG (3, "sanei_w_unit: wire %d\n", w->io.fd); + sanei_w_word (w, &word); + if (w->direction == WIRE_DECODE) + *v = word; + + if (w->direction != WIRE_FREE) + DBG (4, "sanei_w_unit: value = %d\n", word); + /* gosh... all the sane_w_something should be a macro or something */ +} + +void +sanei_w_action (Wire * w, SANE_Action * v) +{ + SANE_Word word = *v; + + DBG (3, "sanei_w_action: wire %d\n", w->io.fd); + + sanei_w_word (w, &word); + if (w->direction == WIRE_DECODE) + *v = word; + + if (w->direction != WIRE_FREE) + DBG (4, "sanei_w_action: value = %d\n", word); +} + +void +sanei_w_frame (Wire * w, SANE_Frame * v) +{ + SANE_Word word = *v; + + DBG (3, "sanei_w_frame: wire %d\n", w->io.fd); + + sanei_w_word (w, &word); + if (w->direction == WIRE_DECODE) + *v = word; + + if (w->direction != WIRE_FREE) + DBG (4, "sanei_w_frame: value = %d\n", word); +} + +void +sanei_w_range (Wire * w, SANE_Range * v) +{ + DBG (3, "sanei_w_range: wire %d\n", w->io.fd); + sanei_w_word (w, &v->min); + sanei_w_word (w, &v->max); + sanei_w_word (w, &v->quant); + if (w->direction != WIRE_FREE) + DBG (4, "sanei_w_range: min/max/step = %f/%f/%f\n", + SANE_UNFIX (v->min), SANE_UNFIX (v->max), SANE_UNFIX (v->quant)); +} + +void +sanei_w_device (Wire * w, SANE_Device * v) +{ + DBG (3, "sanei_w_device: wire %d\n", w->io.fd); + sanei_w_string (w, (SANE_String *) & v->name); + sanei_w_string (w, (SANE_String *) & v->vendor); + sanei_w_string (w, (SANE_String *) & v->model); + sanei_w_string (w, (SANE_String *) & v->type); + if (w->direction != WIRE_FREE) + DBG (4, "sanei_w_device: %s %s from %s (%s)\n", v->name, v->model, + v->vendor, v->type); +} + +void +sanei_w_device_ptr (Wire * w, SANE_Device ** v) +{ + DBG (3, "sanei_w_device_ptr: wire %d\n", w->io.fd); + sanei_w_ptr (w, (void **) v, (WireCodecFunc) sanei_w_device, sizeof (**v)); + if (w->direction != WIRE_FREE) + DBG (4, "sanei_w_device_ptr: device struct at %p\n", *v); +} + +void +sanei_w_option_descriptor (Wire * w, SANE_Option_Descriptor * v) +{ + SANE_Word len; + + DBG (3, "sanei_w_option_descriptor: wire %d\n", w->io.fd); + + sanei_w_string (w, (SANE_String *) & v->name); + sanei_w_string (w, (SANE_String *) & v->title); + sanei_w_string (w, (SANE_String *) & v->desc); + sanei_w_value_type (w, &v->type); + sanei_w_unit (w, &v->unit); + sanei_w_word (w, &v->size); + sanei_w_word (w, &v->cap); + sanei_w_constraint_type (w, &v->constraint_type); + + if (w->direction != WIRE_FREE) + DBG (4, "sanei_w_option_descriptor: option %s\n", v->name); + + switch (v->constraint_type) + { + case SANE_CONSTRAINT_NONE: + break; + + case SANE_CONSTRAINT_RANGE: + sanei_w_ptr (w, (void **) &v->constraint.range, + (WireCodecFunc) sanei_w_range, sizeof (SANE_Range)); + break; + + case SANE_CONSTRAINT_WORD_LIST: + if (w->direction != WIRE_DECODE) + len = v->constraint.word_list[0] + 1; + sanei_w_array (w, &len, (void **) &v->constraint.word_list, + w->codec.w_word, sizeof (SANE_Word)); + break; + + case SANE_CONSTRAINT_STRING_LIST: + if (w->direction != WIRE_DECODE) + { + for (len = 0; v->constraint.string_list[len]; ++len); + ++len; /* send NULL string, too */ + } + sanei_w_array (w, &len, (void **) &v->constraint.string_list, + w->codec.w_string, sizeof (SANE_String)); + break; + } + DBG (4, "sanei_w_option_descriptor: done\n"); +} + +void +sanei_w_option_descriptor_ptr (Wire * w, SANE_Option_Descriptor ** v) +{ + DBG (3, "sanei_w_option_descriptor_ptr: wire %d\n", w->io.fd); + sanei_w_ptr (w, (void **) v, + (WireCodecFunc) sanei_w_option_descriptor, sizeof (**v)); + DBG (4, "sanei_w_option_descriptor_ptr: done\n"); +} + +void +sanei_w_parameters (Wire * w, SANE_Parameters * v) +{ + DBG (3, "sanei_w_parameters: wire %d\n", w->io.fd); + sanei_w_frame (w, &v->format); + sanei_w_bool (w, &v->last_frame); + sanei_w_word (w, &v->bytes_per_line); + sanei_w_word (w, &v->pixels_per_line); + sanei_w_word (w, &v->lines); + sanei_w_word (w, &v->depth); + if (w->direction != WIRE_FREE) + DBG (4, + "sanei_w_parameters: format/last/bpl/ppl/lines/depth = " + "%d/%d/%d/%d/%d/%d\n", v->format, v->last_frame, v->bytes_per_line, + v->pixels_per_line, v->lines, v->depth); +} + +static void +flush (Wire * w) +{ + DBG (3, "flush: wire %d\n", w->io.fd); + if (w->direction == WIRE_ENCODE) + sanei_w_space (w, w->buffer.size + 1); + else if (w->direction == WIRE_DECODE) + w->buffer.curr = w->buffer.end = w->buffer.start; + if (w->status != 0) + DBG (2, "flush: error status %d\n", w->status); + DBG (4, "flush: wire flushed\n"); +} + +void +sanei_w_set_dir (Wire * w, WireDirection dir) +{ + DBG (3, "sanei_w_set_dir: wire %d, old direction WIRE_%s\n", w->io.fd, + w->direction == WIRE_ENCODE ? "ENCODE" : + (w->direction == WIRE_DECODE ? "DECODE" : "FREE")); + if (w->direction == WIRE_DECODE && w->buffer.curr != w->buffer.end) + DBG (1, "sanei_w_set_dir: WARNING: will delete %lu bytes from buffer\n", + (u_long) (w->buffer.end - w->buffer.curr)); + flush (w); + w->direction = dir; + DBG (4, "sanei_w_set_dir: direction changed\n"); + flush (w); + DBG (3, "sanei_w_set_dir: wire %d, new direction WIRE_%s\n", w->io.fd, + dir == WIRE_ENCODE ? "ENCODE" : + (dir == WIRE_DECODE ? "DECODE" : "FREE")); +} + +void +sanei_w_call (Wire * w, + SANE_Word procnum, + WireCodecFunc w_arg, void *arg, + WireCodecFunc w_reply, void *reply) +{ + + DBG (3, "sanei_w_call: wire %d (old status %d)\n", w->io.fd, w->status); + w->status = 0; + sanei_w_set_dir (w, WIRE_ENCODE); + + DBG (4, "sanei_w_call: sending request (procedure number: %d)\n", procnum); + sanei_w_word (w, &procnum); + (*w_arg) (w, arg); + + if (w->status == 0) + { + DBG (4, "sanei_w_call: receiving reply\n"); + sanei_w_set_dir (w, WIRE_DECODE); + (*w_reply) (w, reply); + } + + if (w->status != 0) + DBG (2, "sanei_w_call: error status %d\n", w->status); + DBG (4, "sanei_w_call: done\n"); +} + +void +sanei_w_reply (Wire * w, WireCodecFunc w_reply, void *reply) +{ + DBG (3, "sanei_w_reply: wire %d (old status %d)\n", w->io.fd, w->status); + w->status = 0; + sanei_w_set_dir (w, WIRE_ENCODE); + (*w_reply) (w, reply); + flush (w); + if (w->status != 0) + DBG (2, "sanei_w_reply: error status %d\n", w->status); + DBG (4, "sanei_w_reply: done\n"); +} + +void +sanei_w_free (Wire * w, WireCodecFunc w_reply, void *reply) +{ + WireDirection saved_dir = w->direction; + + DBG (3, "sanei_w_free: wire %d\n", w->io.fd); + + w->direction = WIRE_FREE; + (*w_reply) (w, reply); + w->direction = saved_dir; + + if (w->status != 0) + DBG (2, "sanei_w_free: error status %d\n", w->status); + DBG (4, "sanei_w_free: done\n"); +} + +void +sanei_w_init (Wire * w, void (*codec_init_func) (Wire *)) +{ + DBG_INIT (); + + DBG (3, "sanei_w_init: initializing\n"); + w->status = 0; + w->direction = WIRE_ENCODE; + w->buffer.size = 8192; + w->buffer.start = malloc (w->buffer.size); + + if (w->buffer.start == 0) + { + /* Malloc failed, so return an error. */ + w->status = ENOMEM; + DBG (1, "sanei_w_init: not enough free memory\n"); + } + + w->buffer.curr = w->buffer.start; + w->buffer.end = w->buffer.start + w->buffer.size; + if (codec_init_func != 0) + { + DBG (4, "sanei_w_init: initializing codec\n"); + (*codec_init_func) (w); + } + w->allocated_memory = 0; + DBG (4, "sanei_w_init: done\n"); +} + +void +sanei_w_exit (Wire * w) +{ + DBG (3, "sanei_w_exit: wire %d\n", w->io.fd); + if (w->buffer.start) + { + DBG (4, "sanei_w_exit: freeing buffer\n"); + free (w->buffer.start); + } + w->buffer.start = 0; + w->buffer.size = 0; + DBG (4, "sanei_w_exit: done\n"); +} -- cgit v1.2.3