mirror of
https://git.rwth-aachen.de/acs/public/villas/node/
synced 2025-03-09 00:00:00 +01:00
341 lines
7.2 KiB
C++
341 lines
7.2 KiB
C++
/** JSON serializtion for RESERVE project.
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*
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* @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
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* @copyright 2014-2020, Institute for Automation of Complex Power Systems, EONERC
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* @license GNU General Public License (version 3)
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*
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* VILLASnode
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*********************************************************************************/
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#include <cstring>
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#include <villas/plugin.h>
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#include <villas/sample.h>
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#include <villas/node.h>
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#include <villas/signal.h>
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#include <villas/compat.hpp>
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#include <villas/timing.h>
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#include <villas/io.h>
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#include <villas/formats/json_reserve.h>
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#define JSON_RESERVE_INTEGER_TARGET 1
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static int json_reserve_pack_sample(struct io *io, json_t **j, struct sample *smp)
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{
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json_error_t err;
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json_t *json_data, *json_name, *json_unit, *json_value;
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json_t *json_created = nullptr;
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json_t *json_sequence = nullptr;
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if (smp->flags & (int) SampleFlags::HAS_TS_ORIGIN)
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json_created = json_integer(time_to_double(&smp->ts.origin) * 1e3);
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if (smp->flags & (int) SampleFlags::HAS_SEQUENCE)
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json_sequence = json_integer(smp->sequence);
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json_data = json_array();
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for (unsigned i = 0; i < smp->length; i++) {
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struct signal *sig = (struct signal *) vlist_at_safe(smp->signals, i);
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if (!sig)
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return -1;
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if (sig->name)
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json_name = json_string(sig->name);
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else {
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char name[32];
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snprintf(name, 32, "signal%u", i);
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json_name = json_string(name);
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}
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if (sig->unit)
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json_unit = json_string(sig->unit);
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else
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json_unit = nullptr;
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json_value = json_pack_ex(&err, 0, "{ s: o, s: f }",
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"name", json_name,
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"value", smp->data[i].f
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);
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if (!json_value)
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continue;
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if (json_unit)
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json_object_set(json_value, "unit", json_unit);
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if (json_created)
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json_object_set(json_value, "created", json_created);
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if (json_sequence)
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json_object_set(json_value, "sequence", json_sequence);
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json_array_append(json_data, json_value);
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}
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if (json_created)
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json_decref(json_created);
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if (json_sequence)
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json_decref(json_sequence);
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*j = json_pack_ex(&err, 0, "{ s: o }",
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"measurements", json_data
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);
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if (*j == nullptr)
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return -1;
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#if 0
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#ifdef JSON_RESERVE_INTEGER_TARGET
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if (io->out.node) {
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char *endptr;
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char *id_str = strrchr(io->out.node->name, '_');
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if (!id_str)
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return -1;
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int id = strtoul(id_str+1, &endptr, 10);
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if (endptr[0] != 0)
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return -1;
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json_object_set_new(*j, "target", json_integer(id));
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}
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#else
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if (io->out.node)
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json_object_set_new(*j, "target", json_string(io->out.node->name));
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#endif
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#endif
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return 0;
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}
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static int json_reserve_unpack_sample(struct io *io, json_t *json_smp, struct sample *smp)
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{
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int ret, idx;
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double created = -1;
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json_error_t err;
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json_t *json_value, *json_data = nullptr;
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json_t *json_origin = nullptr, *json_target = nullptr;
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size_t i;
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ret = json_unpack_ex(json_smp, &err, 0, "{ s?: o, s?: o, s?: o, s?: o }",
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"origin", &json_origin,
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"target", &json_target,
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"measurements", &json_data,
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"setpoints", &json_data
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);
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if (ret)
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return -1;
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#if 0
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#ifdef JSON_RESERVE_INTEGER_TARGET
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if (json_target && io->in.node) {
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if (!json_is_integer(json_target))
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return -1;
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char *endptr;
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char *id_str = strrchr(io->in.node->name, '_');
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if (!id_str)
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return -1;
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int id = strtoul(id_str+1, &endptr, 10);
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if (endptr[0] != 0)
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return -1;
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if (id != json_integer_value(json_target))
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return 0;
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}
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#else
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if (json_target && io->in.node) {
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const char *target = json_string_value(json_target);
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if (!target)
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return -1;
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if (strcmp(target, io->in.node->name))
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return 0;
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}
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#endif
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#endif
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if (!json_data || !json_is_array(json_data))
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return -1;
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smp->flags = 0;
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smp->length = 0;
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json_array_foreach(json_data, i, json_value) {
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const char *name, *unit = nullptr;
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double value;
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ret = json_unpack_ex(json_value, &err, 0, "{ s: s, s?: s, s: F, s?: F }",
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"name", &name,
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"unit", &unit,
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"value", &value,
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"created", &created
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);
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if (ret)
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return -1;
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struct signal *sig;
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sig = vlist_lookup_name<struct signal>(io->signals, name);
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if (sig) {
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if (!sig->enabled)
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continue;
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idx = vlist_index(io->signals, sig);
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}
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else {
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ret = sscanf(name, "signal_%d", &idx);
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if (ret != 1)
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continue;
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}
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if (idx < 0)
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return -1;
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if (idx < (int) smp->capacity) {
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smp->data[idx].f = value;
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if (idx >= (int) smp->length)
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smp->length = idx + 1;
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}
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}
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if (smp->length > 0)
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smp->flags |= (int) SampleFlags::HAS_DATA;
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if (created > 0) {
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smp->ts.origin = time_from_double(created * 1e-3);
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smp->flags |= (int) SampleFlags::HAS_TS_ORIGIN;
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}
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return smp->length > 0 ? 1 : 0;
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}
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/*
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* Note: The following functions are the same as io/json.c !!!
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*/
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int json_reserve_sprint(struct io *io, char *buf, size_t len, size_t *wbytes, struct sample *smps[], unsigned cnt)
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{
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int ret;
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json_t *json;
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size_t wr;
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assert(cnt == 1);
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ret = json_reserve_pack_sample(io, &json, smps[0]);
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if (ret < 0)
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return ret;
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wr = json_dumpb(json, buf, len, 0);
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json_decref(json);
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if (wbytes)
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*wbytes = wr;
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return ret;
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}
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int json_reserve_sscan(struct io *io, const char *buf, size_t len, size_t *rbytes, struct sample *smps[], unsigned cnt)
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{
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int ret;
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json_t *json;
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json_error_t err;
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assert(cnt == 1);
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json = json_loadb(buf, len, 0, &err);
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if (!json)
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return -1;
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ret = json_reserve_unpack_sample(io, json, smps[0]);
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json_decref(json);
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if (ret < 0)
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return ret;
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if (rbytes)
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*rbytes = err.position;
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return ret;
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}
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int json_reserve_print(struct io *io, struct sample *smps[], unsigned cnt)
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{
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int ret;
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unsigned i;
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json_t *json;
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FILE *f = io_stream_output(io);
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for (i = 0; i < cnt; i++) {
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ret = json_reserve_pack_sample(io, &json, smps[i]);
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if (ret)
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return ret;
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ret = json_dumpf(json, f, 0);
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fputc('\n', f);
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json_decref(json);
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if (ret)
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return ret;
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}
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return i;
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}
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int json_reserve_scan(struct io *io, struct sample *smps[], unsigned cnt)
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{
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int ret;
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unsigned i;
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json_t *json;
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json_error_t err;
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FILE *f = io_stream_input(io);
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for (i = 0; i < cnt; i++) {
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skip: json = json_loadf(f, JSON_DISABLE_EOF_CHECK, &err);
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if (!json)
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break;
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ret = json_reserve_unpack_sample(io, json, smps[i]);
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json_decref(json);
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if (ret < 0)
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goto skip;
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}
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return i;
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}
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static struct plugin p;
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__attribute__((constructor(110))) static void UNIQUE(__ctor)() {
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p.name = "json.reserve";
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p.description = "RESERVE JSON format";
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p.type = PluginType::FORMAT;
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p.format.print = json_reserve_print;
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p.format.scan = json_reserve_scan;
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p.format.sprint = json_reserve_sprint;
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p.format.sscan = json_reserve_sscan;
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p.format.size = 0;
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vlist_init_and_push(&plugins, &p);
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}
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__attribute__((destructor(110))) static void UNIQUE(__dtor)() {
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vlist_remove_all(&plugins, &p);
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}
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