/* JSON serializtion for RESERVE project. * * Author: Steffen Vogel * SPDX-FileCopyrightText: 2014-2023 Institute for Automation of Complex Power Systems, RWTH Aachen University * SPDX-License-Identifier: Apache-2.0 */ #include #include #include using namespace villas::node; #define JSON_RESERVE_INTEGER_TARGET 1 int JsonReserveFormat::packSample(json_t **json_smp, const struct Sample *smp) { json_error_t err; json_t *json_root; json_t *json_data; json_t *json_name; json_t *json_unit; json_t *json_value; json_t *json_created = nullptr; json_t *json_sequence = nullptr; if (smp->flags & (int)SampleFlags::HAS_TS_ORIGIN) json_created = json_integer(time_to_double(&smp->ts.origin) * 1e3); if (smp->flags & (int)SampleFlags::HAS_SEQUENCE) json_sequence = json_integer(smp->sequence); json_data = json_array(); for (unsigned i = 0; i < smp->length; i++) { auto sig = smp->signals->getByIndex(i); if (!sig) return -1; if (!sig->name.empty()) json_name = json_string(sig->name.c_str()); else { char name[32]; snprintf(name, 32, "signal%u", i); json_name = json_string(name); } if (!sig->unit.empty()) json_unit = json_string(sig->unit.c_str()); else json_unit = nullptr; json_value = json_pack_ex(&err, 0, "{ s: o, s: f }", "name", json_name, "value", smp->data[i].f); if (!json_value) continue; if (json_unit) json_object_set_new(json_value, "unit", json_unit); if (json_created) json_object_set_new(json_value, "created", json_created); if (json_sequence) json_object_set_new(json_value, "sequence", json_sequence); json_array_append_new(json_data, json_value); } json_root = json_pack_ex(&err, 0, "{ s: o }", "measurements", json_data); if (json_root == nullptr) return -1; #if 0 #ifdef JSON_RESERVE_INTEGER_TARGET if (io->out.node) { char *endptr; char *id_str = strrchr(io->out.node->name, '_'); if (!id_str) return -1; int id = strtoul(id_str+1, &endptr, 10); if (endptr[0] != 0) return -1; json_object_set_new(json_root, "target", json_integer(id)); } #else if (io->out.node) json_object_set_new(json_root, "target", json_string(io->out.node->name)); #endif #endif *json_smp = json_root; return 0; } int JsonReserveFormat::unpackSample(json_t *json_smp, struct Sample *smp) { int ret, idx; double created = -1; json_error_t err; json_t *json_value, *json_data = nullptr; json_t *json_origin = nullptr, *json_target = nullptr; size_t i; ret = json_unpack_ex(json_smp, &err, 0, "{ s?: o, s?: o, s?: o, s?: o }", "origin", &json_origin, "target", &json_target, "measurements", &json_data, "setpoints", &json_data); if (ret) return -1; #if 0 #ifdef JSON_RESERVE_INTEGER_TARGET if (json_target && io->in.node) { if (!json_is_integer(json_target)) return -1; char *endptr; char *id_str = strrchr(io->in.node->name, '_'); if (!id_str) return -1; int id = strtoul(id_str+1, &endptr, 10); if (endptr[0] != 0) return -1; if (id != json_integer_value(json_target)) return 0; } #else if (json_target && io->in.node) { const char *target = json_string_value(json_target); if (!target) return -1; if (strcmp(target, io->in.node->name)) return 0; } #endif #endif if (!json_data || !json_is_array(json_data)) return -1; smp->flags = 0; smp->length = 0; json_array_foreach(json_data, i, json_value) { const char *name, *unit = nullptr; double value; ret = json_unpack_ex(json_value, &err, 0, "{ s: s, s?: s, s: F, s?: F }", "name", &name, "unit", &unit, "value", &value, "created", &created); if (ret) return -1; auto sig = signals->getByName(name); if (sig) idx = signals->getIndexByName(name); else { ret = sscanf(name, "signal_%d", &idx); if (ret != 1) continue; } if (idx < 0) return -1; if (idx < (int)smp->capacity) { smp->data[idx].f = value; if (idx >= (int)smp->length) smp->length = idx + 1; } } if (smp->length > 0) smp->flags |= (int)SampleFlags::HAS_DATA; if (created > 0) { smp->ts.origin = time_from_double(created * 1e-3); smp->flags |= (int)SampleFlags::HAS_TS_ORIGIN; } return smp->length > 0 ? 1 : 0; } // Register format static char n[] = "json.reserve"; static char d[] = "RESERVE JSON format"; static FormatPlugin p;