107 lines
3.6 KiB
C
107 lines
3.6 KiB
C
/* snmp-ups-helpers.c - Shared helper functions and data mapping tables
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* for NUT Generic SNMP driver core
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*
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* Copyright (C)
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* 2015 - 2021 Eaton (author: Arnaud Quette <ArnaudQuette@Eaton.com>)
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* 2016 - 2021 Eaton (author: Jim Klimov <EvgenyKlimov@Eaton.com>)
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*
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* Sponsored by Eaton <http://www.eaton.com>
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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 2 of the License, or
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* (at your option) 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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*
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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, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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/* NUT SNMP common functions */
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#include "common.h" /* includes "config.h" which must be the first header */
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/*
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#include "config.h"
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#include "main.h"
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#include "nut_float.h"
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#include "nut_stdint.h"
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*/
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#include "snmp-ups.h"
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#include "timehead.h" /* time.h => strptime() */
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#include <ctype.h> /* for isprint() */
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/***********************************************************************
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* Subdrivers shared helpers functions
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* Code below is primarily used in snmp-ups driver, but may be part
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* of other compilation units, so separated into a stand-alone file
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**********************************************************************/
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static char su_scratch_buf[255];
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/* Temperature handling, to convert back to Celsius */
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int temperature_unit = TEMPERATURE_UNKNOWN;
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/* Convert a US formated date (mm/dd/yyyy) to an ISO 8601 Calendar date (yyyy-mm-dd) */
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const char *su_usdate_to_isodate_info_fun(void *raw_date)
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{
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const char *usdate = (char *)raw_date;
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struct tm tm;
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memset(&tm, 0, sizeof(struct tm));
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memset(&su_scratch_buf, 0, sizeof(su_scratch_buf));
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upsdebugx(3, "%s: US date = %s", __func__, usdate);
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/* Try to convert from US date string to time */
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/* Note strptime returns NULL upon failure, and a ptr to the last
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null char of the string upon success. Just try blindly the conversion! */
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strptime(usdate, "%m/%d/%Y", &tm);
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if (strftime(su_scratch_buf, 254, "%F", &tm) != 0) {
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upsdebugx(3, "%s: successfully reformated: %s", __func__, su_scratch_buf);
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return su_scratch_buf;
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}
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return NULL;
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}
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info_lkp_t su_convert_to_iso_date_info[] = {
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/* array index = FUNMAP_USDATE_TO_ISODATE: */
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{ 1, "dummy", su_usdate_to_isodate_info_fun, NULL },
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{ 0, NULL, NULL, NULL }
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};
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/* Process temperature value according to 'temperature_unit' */
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const char *su_temperature_read_fun(void *raw_snmp_value)
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{
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const long snmp_value = *((long*)raw_snmp_value);
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long celsius_value = snmp_value;
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memset(su_scratch_buf, 0, sizeof(su_scratch_buf));
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switch (temperature_unit) {
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case TEMPERATURE_KELVIN:
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celsius_value = (snmp_value / 10) - 273.15;
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snprintf(su_scratch_buf, sizeof(su_scratch_buf), "%.1ld", celsius_value);
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break;
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case TEMPERATURE_CELSIUS:
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snprintf(su_scratch_buf, sizeof(su_scratch_buf), "%.1ld", (snmp_value / 10));
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break;
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case TEMPERATURE_FAHRENHEIT:
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celsius_value = (((snmp_value / 10) - 32) * 5) / 9;
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snprintf(su_scratch_buf, sizeof(su_scratch_buf), "%.1ld", celsius_value);
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break;
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case TEMPERATURE_UNKNOWN:
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default:
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upsdebugx(1, "%s: not a known temperature unit for conversion!", __func__);
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break;
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}
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upsdebugx(2, "%s: %.1ld => %s", __func__, (snmp_value / 10), su_scratch_buf);
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return su_scratch_buf;
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}
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