/** JSON serializtion for RESERVE project. * * @author Steffen Vogel * @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 . *********************************************************************************/ #include #include #include #include #include #include #include #include #include #define JSON_RESERVE_INTEGER_TARGET 1 static int json_reserve_pack_sample(struct io *io, json_t **j, struct sample *smp) { json_error_t err; json_t *json_data, *json_name, *json_unit, *json_value; json_t *json_created = NULL, *json_sequence = NULL; struct signal *sig; if (smp->flags & SAMPLE_HAS_ORIGIN) json_created = json_integer(time_to_double(&smp->ts.origin) * 1e3); if (smp->flags & SAMPLE_HAS_SEQUENCE) json_sequence = json_integer(smp->sequence); json_data = json_array(); for (int i = 0; i < smp->length; i++) { if (io->output.signals) sig = (struct signal *) list_at_safe(io->output.signals, i); else sig = NULL; if (sig) { if (!sig->enabled) continue; json_name = json_string(sig->name); json_unit = json_string(sig->unit); } else { char name[32]; snprintf(name, 32, "signal_%d", i); json_name = json_string(name); json_unit = NULL; } 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(json_value, "unit", json_unit); if (json_created) json_object_set(json_value, "created", json_created); if (json_sequence) json_object_set(json_value, "sequence", json_sequence); json_array_append(json_data, json_value); } if (json_created) json_decref(json_created); if (json_sequence) json_decref(json_sequence); *j = json_pack_ex(&err, 0, "{ s: o }", "measurements", json_data ); if (*j == NULL) return -1; #ifdef JSON_RESERVE_INTEGER_TARGET if (io->output.node) { char *endptr; char *id_str = strrchr(io->output.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(*j, "target", json_integer(id)); } #else if (io->output.node) json_object_set_new(*j, "target", json_string(io->output.node->name)); if (smp->source) json_object_set_new(*j, "origin", json_string(smp->source->name)); #endif return 0; } static int json_reserve_unpack_sample(struct io *io, json_t *json_smp, struct sample *smp) { int ret, idx; double created = -1; json_error_t err; json_t *json_value, *json_data = NULL; json_t *json_origin = NULL, *json_target = NULL; 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; #ifdef JSON_RESERVE_INTEGER_TARGET if (json_target && io->input.node) { if (!json_is_integer(json_target)) return -1; char *endptr; char *id_str = strrchr(io->input.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->input.node) { const char *target = json_string_value(json_target); if (!target) return -1; if (strcmp(target, io->input.node->name)) return 0; } #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 = NULL; 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; struct signal *sig; sig = (struct signal *) list_lookup(io->input.signals, name); if (sig) { if (!sig->enabled) continue; idx = list_index(io->input.signals, sig); } else { ret = sscanf(name, "signal_%d", &idx); if (ret != 1) continue; } if (idx < smp->capacity) { smp->data[idx].f = value; if (idx >= smp->length) smp->length = idx + 1; } } if (smp->length > 0) smp->flags |= SAMPLE_HAS_VALUES; if (created > 0) { smp->ts.origin = time_from_double(created * 1e-3); smp->flags |= SAMPLE_HAS_ORIGIN; } return smp->length > 0 ? 1 : 0; } /* * Note: The following functions are the same as io/json.c !!! */ int json_reserve_sprint(struct io *io, char *buf, size_t len, size_t *wbytes, struct sample *smps[], unsigned cnt) { int ret; json_t *json; size_t wr; assert(cnt == 1); ret = json_reserve_pack_sample(io, &json, smps[0]); if (ret < 0) return ret; wr = json_dumpb(json, buf, len, 0); json_decref(json); if (wbytes) *wbytes = wr; return ret; } int json_reserve_sscan(struct io *io, char *buf, size_t len, size_t *rbytes, struct sample *smps[], unsigned cnt) { int ret; json_t *json; json_error_t err; assert(cnt == 1); json = json_loadb(buf, len, 0, &err); if (!json) return -1; ret = json_reserve_unpack_sample(io, json, smps[0]); json_decref(json); if (ret < 0) return ret; if (rbytes) *rbytes = err.position; return ret; } int json_reserve_print(struct io *io, struct sample *smps[], unsigned cnt) { int ret, i; json_t *json; FILE *f = io_stream_output(io); for (i = 0; i < cnt; i++) { ret = json_reserve_pack_sample(io, &json, smps[i]); if (ret) return ret; ret = json_dumpf(json, f, 0); fputc('\n', f); json_decref(json); if (ret) return ret; } return i; } int json_reserve_scan(struct io *io, struct sample *smps[], unsigned cnt) { int i, ret; json_t *json; json_error_t err; FILE *f = io_stream_input(io); for (i = 0; i < cnt; i++) { skip: json = json_loadf(f, JSON_DISABLE_EOF_CHECK, &err); if (!json) break; ret = json_reserve_unpack_sample(io, json, smps[i]); json_decref(json); if (ret < 0) goto skip; } return i; } static struct plugin p = { .name = "json.reserve", .description = "RESERVE JSON format", .type = PLUGIN_TYPE_FORMAT, .format = { .scan = json_reserve_scan, .print = json_reserve_print, .sscan = json_reserve_sscan, .sprint = json_reserve_sprint, .size = 0 }, }; REGISTER_PLUGIN(&p);