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/*
* BRLTTY - A background process providing access to the console screen (when in
* text mode) for a blind person using a refreshable braille display.
*
* Copyright (C) 1995-2014 by The BRLTTY Developers.
*
* BRLTTY comes with ABSOLUTELY NO WARRANTY.
*
* This is free software, placed 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. Please see the file LICENSE-GPL for details.
*
* Web Page: http://mielke.cc/brltty/
*
* This software is maintained by Dave Mielke <dave@mielke.cc>.
*/
#include "prologue.h"
#include <string.h>
#include "log.h"
#include "io_generic.h"
#include "gio_internal.h"
#include "io_serial.h"
struct GioHandleStruct {
SerialDevice *device;
SerialParameters parameters;
};
static int
disconnectSerialResource (GioHandle *handle) {
serialCloseDevice(handle->device);
free(handle);
return 1;
}
static ssize_t
writeSerialData (GioHandle *handle, const void *data, size_t size, int timeout) {
return serialWriteData(handle->device, data, size);
}
static int
awaitSerialInput (GioHandle *handle, int timeout) {
return serialAwaitInput(handle->device, timeout);
}
static ssize_t
readSerialData (
GioHandle *handle, void *buffer, size_t size,
int initialTimeout, int subsequentTimeout
) {
return serialReadData(handle->device, buffer, size,
initialTimeout, subsequentTimeout);
}
static int
reconfigureSerialResource (GioHandle *handle, const SerialParameters *parameters) {
int ok = serialSetParameters(handle->device, parameters);
if (ok) handle->parameters = *parameters;
return ok;
}
static int
monitorSerialInput (GioHandle *handle, AsyncMonitorCallback *callback, void *data) {
return serialMonitorInput(handle->device, callback, data);
}
static void *
getSerialResourceObject (GioHandle *handle) {
return handle->device;
}
static const GioMethods gioSerialMethods = {
.disconnectResource = disconnectSerialResource,
.writeData = writeSerialData,
.awaitInput = awaitSerialInput,
.readData = readSerialData,
.reconfigureResource = reconfigureSerialResource,
.monitorInput = monitorSerialInput,
.getResourceObject = getSerialResourceObject
};
static int
isSerialSupported (const GioDescriptor *descriptor) {
return descriptor->serial.parameters != NULL;
}
static int
testSerialIdentifier (const char **identifier) {
return isSerialDevice(identifier);
}
static const GioOptions *
getSerialOptions (const GioDescriptor *descriptor) {
return &descriptor->serial.options;
}
static const GioMethods *
getSerialMethods (void) {
return &gioSerialMethods;
}
static GioHandle *
connectSerialResource (
const char *identifier,
const GioDescriptor *descriptor
) {
GioHandle *handle = malloc(sizeof(*handle));
if (handle) {
memset(handle, 0, sizeof(*handle));
if ((handle->device = serialOpenDevice(identifier))) {
if (serialSetParameters(handle->device, descriptor->serial.parameters)) {
handle->parameters = *descriptor->serial.parameters;
return handle;
}
serialCloseDevice(handle->device);
}
free(handle);
} else {
logMallocError();
}
return NULL;
}
static int
prepareSerialEndpoint (GioEndpoint *endpoint) {
gioSetBytesPerSecond(endpoint, &endpoint->handle->parameters);
return 1;
}
const GioClass gioSerialClass = {
.isSupported = isSerialSupported,
.testIdentifier = testSerialIdentifier,
.getOptions = getSerialOptions,
.getMethods = getSerialMethods,
.connectResource = connectSerialResource,
.prepareEndpoint = prepareSerialEndpoint,
.resourceType = GIO_RESOURCE_SERIAL
};
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