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Code Issues Releases Wiki Activity

protobuf: added new format type

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This commit is contained in:
Steffen Vogel 2017-10-27 19:16:09 +02:00
parent 7d6ca30f8a
commit 950d44c32e
7 changed files with 264 additions and 3 deletions
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4
include/villas/io/msg_format.h
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@ -29,7 +29,7 @@
#define MSG_VERSION 2
/** @todo Implement more message types */
#define MSG_TYPE_DATA 0 /**< Message contains float values */
#define MSG_TYPE_DATA 0 /**< Message contains float / integer values */
#define MSG_TYPE_START 1 /**< Message marks the beginning of a new simulation case */
#define MSG_TYPE_STOP 2 /**< Message marks the end of a simulation case */
@ -75,7 +75,7 @@ struct msg
#error Invalid byte-order
#endif
uint8_t id; /**< An id which identifies the source of this sample */
uint8_t id; /**< An id which identifies the source of this sample. */
uint16_t length; /**< The number of values in msg::data[]. */
uint32_t sequence; /**< The sequence number is incremented by one for consecutive messages. */

35
include/villas/io/protobuf.h Normal file
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@ -0,0 +1,35 @@
/** Protobuf IO format
*
* @file
* @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
* @copyright 2017, Institute for Automation of Complex Power Systems, EONERC
* @license GNU General Public License (version 3)
*
* VILLASnode
*
* 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 3 of the License, or
* 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, see <http://www.gnu.org/licenses/>.
*********************************************************************************/
#pragma once
#include <stdlib.h>
/* Forward declarations */
struct sample;
/** Copy / read struct msg's from buffer \p buf to / fram samples \p smps. */
int protobuf_sprint(char *buf, size_t len, size_t *wbytes, struct sample *smps[], unsigned cnt, int flags);
/** Read struct sample's from buffer \p buf into samples \p smps. */
int protobuf_sscan(char *buf, size_t len, size_t *rbytes, struct sample *smps[], unsigned cnt, int flags);

3
lib/io/.gitignore vendored Normal file
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@ -0,0 +1,3 @@
# Generated code by Protobuf-c
*.pb-c.h
*.pb-c.c

17
lib/io/Makefile.inc
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@ -21,3 +21,20 @@
###################################################################################
LIB_SRCS += $(addprefix lib/io/,json.c villas_binary.c villas_human.c csv.c raw.c msg.c)
WITH_PROTOBUF ?= 1
# Enable Google Protobuf IO format
ifeq ($(WITH_PROTOBUF),1)
ifeq ($(shell $(PKGCONFIG) libprotobuf-c; echo $$?),0)
LIB_SRCS += lib/io/protobuf.c lib/io/villas.pb-c.c
LIB_PKGS += libprotobuf-c
endif
endif
%.pb-c.h: %.proto
protoc-c --proto_path=$(SRCDIR) --c_out=$(SRCDIR) $(realpath $^)
lib/io/villas.pb-c.c \
lib/io/protobuf.c: | lib/io/villas.pb-c.h

152
lib/io/protobuf.c Normal file
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@ -0,0 +1,152 @@
/** Protobuf IO format
*
* @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
* @copyright 2017, Institute for Automation of Complex Power Systems, EONERC
* @license GNU General Public License (version 3)
*
* VILLASnode
*
* 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 3 of the License, or
* 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, see <http://www.gnu.org/licenses/>.
*********************************************************************************/
// Generated message descriptors by protoc
#include "villas.pb-c.h"
#include "sample.h"
#include "plugin.h"
#include "io/protobuf.h"
int protobuf_sprint(char *buf, size_t len, size_t *wbytes, struct sample *smps[], unsigned cnt, int flags)
{
unsigned psz;
Villas__Node__Message *pb_msg = alloc(sizeof(Villas__Node__Message));
villas__node__message__init(pb_msg);
pb_msg->n_samples = cnt;
pb_msg->samples = alloc(pb_msg->n_samples * sizeof(Villas__Node__Sample *));
for (unsigned i = 0; i < pb_msg->n_samples; i++) {
Villas__Node__Sample *pb_smp = pb_msg->samples[i] = alloc(sizeof(Villas__Node__Sample));
villas__node__sample__init(pb_smp);
struct sample *smp = smps[i];
pb_smp->type = VILLAS__NODE__SAMPLE__TYPE__DATA;
pb_smp->sequence = smp->sequence;
pb_smp->id = smp->id;
pb_smp->timestamp = alloc(sizeof(Villas__Node__Timestamp));
villas__node__timestamp__init(pb_smp->timestamp);
pb_smp->timestamp->sec = smp->ts.origin.tv_sec;
pb_smp->timestamp->nsec = smp->ts.origin.tv_nsec;
pb_smp->n_values = smp->length;
pb_smp->values = alloc(pb_smp->n_values * sizeof(Villas__Node__Value *));
for (unsigned j = 0; j < pb_smp->n_values; j++) {
Villas__Node__Value *pb_val = pb_smp->values[j] = alloc(sizeof(Villas__Node__Value));
villas__node__value__init(pb_val);
enum sample_data_format fmt = sample_get_data_format(smp, j);
switch (fmt) {
case SAMPLE_DATA_FORMAT_FLOAT: pb_val->value_case = VILLAS__NODE__VALUE__VALUE_F; pb_val->f = smp->data[j].f; break;
case SAMPLE_DATA_FORMAT_INT: pb_val->value_case = VILLAS__NODE__VALUE__VALUE_I; pb_val->i = smp->data[j].i; break;
default: pb_val->value_case = VILLAS__NODE__VALUE__VALUE__NOT_SET; break;
}
}
}
psz = villas__node__message__get_packed_size(pb_msg);
if (psz > len)
goto out;
villas__node__message__pack(pb_msg, (uint8_t *) buf);
villas__node__message__free_unpacked(pb_msg, NULL);
*wbytes = psz;
return cnt;
out:
villas__node__message__free_unpacked(pb_msg, NULL);
return -1;
}
int protobuf_sscan(char *buf, size_t len, size_t *rbytes, struct sample *smps[], unsigned cnt, int flags)
{
unsigned i, j;
Villas__Node__Message *pb_msg;
pb_msg = villas__node__message__unpack(NULL, len, (uint8_t *) buf);
for (i = 0; i < MIN(pb_msg->n_samples, cnt); i++) {
struct sample *smp = smps[i];
Villas__Node__Sample *pb_smp = pb_msg->samples[i];
if (pb_smp->type != VILLAS__NODE__SAMPLE__TYPE__DATA) {
warn("Parsed non supported message type");
break;
}
smp->sequence = pb_smp->sequence;
if (pb_smp->has_id)
smp->id = pb_smp->id;
if (pb_smp->timestamp) {
smp->ts.origin.tv_sec = pb_smp->timestamp->sec;
smp->ts.origin.tv_nsec = pb_smp->timestamp->nsec;
}
for (j = 0; j < MIN(pb_smp->n_values, smp->capacity); j++) {
Villas__Node__Value *pb_val = pb_smp->values[j];
enum sample_data_format fmt = pb_val->value_case == VILLAS__NODE__VALUE__VALUE_F
? SAMPLE_DATA_FORMAT_FLOAT
: SAMPLE_DATA_FORMAT_INT;
switch (fmt) {
case SAMPLE_DATA_FORMAT_FLOAT: smp->data[j].f = pb_val->f; break;
case SAMPLE_DATA_FORMAT_INT: smp->data[j].i = pb_val->i; break;
default: { }
}
sample_set_data_format(smp, j, fmt);
}
smp->length = j;
}
*rbytes = villas__node__message__get_packed_size(pb_msg);
villas__node__message__free_unpacked(pb_msg, NULL);
return i;
}
static struct plugin p = {
.name = "protobuf",
.description = "Google Protobuf",
.type = PLUGIN_TYPE_IO,
.io = {
.sprint = protobuf_sprint,
.sscan = protobuf_sscan
}
};
REGISTER_PLUGIN(&p);

54
lib/io/villas.proto Normal file
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@ -0,0 +1,54 @@
/// Protobuf schema based on msg_format.h
///
/// @file
/// @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
/// @copyright 2017, Institute for Automation of Complex Power Systems, EONERC
/// @license GNU General Public License (version 3)
///
/// VILLASnode
///
/// 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 3 of the License, or
/// 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, see <http://www.gnu.org/licenses/>.
////////////////////////////////////////////////////////////////////////////////////
package villas.node;
message Message {
repeated Sample samples = 1;
}
message Sample {
enum Type {
DATA = 1; // Message contains float / integer data values
START = 2; // Message marks the beginning of a new simulation case
STOP = 3; // Message marks the end of a simulation case
};
required Type type = 1 [default = DATA];
required uint32 sequence = 2; // The sequence number is incremented by one for consecutive messages.
optional uint32 id = 3; // An id which identifies the source of this sample.
optional Timestamp timestamp = 4;
repeated Value values = 5;
}
message Timestamp {
required uint32 sec = 1; // Seconds since 1970-01-01 00:00:00
required uint32 nsec = 2; // Nanoseconds of the current second.
}
message Value {
oneof value {
float f = 1; // Floating point values.
int32 i = 2; // Integer values.
}
}

2
tests/integration/pipe-loopback-socket.sh
View file

@ -36,7 +36,7 @@ NUM_SAMPLES=${NUM_SAMPLES:-100}
# Generate test data
villas-signal random -l ${NUM_SAMPLES} -n > ${INPUT_FILE}
for FORMAT in villas-human villas-binary villas-web csv json gtnet-fake raw-flt32; do
for FORMAT in villas-human villas-binary villas-web csv json gtnet-fake raw-flt32 protobuf; do
for LAYER in udp ip eth unix; do
for VERIFY_SOURCE in true false; do