/*-
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* Copyright (c) 2012-2013 Jan Breuer,
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*
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* All Rights Reserved
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* @file scpi_units.c
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* @date Thu Nov 15 10:58:45 UTC 2012
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*
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* @brief SCPI units
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*
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*
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*/
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#include <string.h>
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#include "scpi/parser.h"
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#include "scpi/units.h"
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#include "utils_private.h"
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#include "scpi/error.h"
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#include "lexer_private.h"
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/*
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* multipliers IEEE 488.2-1992 tab 7-2
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* 1E18 EX
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* 1E15 PE
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* 1E12 T
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* 1E9 G
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* 1E6 MA (use M for OHM and HZ)
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* 1E3 K
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* 1E-3 M (disaalowed for OHM and HZ)
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* 1E-6 U
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* 1E-9 N
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* 1E-12 P
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* 1E-15 F
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* 1E-18 A
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*/
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/*
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* units definition IEEE 488.2-1992 tab 7-1
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*/
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const scpi_unit_def_t scpi_units_def[] = {
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/* voltage */
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{/* name */ "UV", /* unit */ SCPI_UNIT_VOLT, /* mult */ 1e-6},
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{/* name */ "MV", /* unit */ SCPI_UNIT_VOLT, /* mult */ 1e-3},
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{/* name */ "V", /* unit */ SCPI_UNIT_VOLT, /* mult */ 1},
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{/* name */ "KV", /* unit */ SCPI_UNIT_VOLT, /* mult */ 1e3},
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/* current */
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{/* name */ "UA", /* unit */ SCPI_UNIT_AMPER, /* mult */ 1e-6},
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{/* name */ "MA", /* unit */ SCPI_UNIT_AMPER, /* mult */ 1e-3},
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{/* name */ "A", /* unit */ SCPI_UNIT_AMPER, /* mult */ 1},
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{/* name */ "KA", /* unit */ SCPI_UNIT_AMPER, /* mult */ 1e3},
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/* resistance */
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{/* name */ "OHM", /* unit */ SCPI_UNIT_OHM, /* mult */ 1},
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{/* name */ "KOHM", /* unit */ SCPI_UNIT_OHM, /* mult */ 1e3},
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{/* name */ "MOHM", /* unit */ SCPI_UNIT_OHM, /* mult */ 1e6},
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/* frequency */
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{/* name */ "HZ", /* unit */ SCPI_UNIT_HERTZ, /* mult */ 1},
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{/* name */ "KHZ", /* unit */ SCPI_UNIT_HERTZ, /* mult */ 1e3},
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{/* name */ "MHZ", /* unit */ SCPI_UNIT_HERTZ, /* mult */ 1e6},
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{/* name */ "GHZ", /* unit */ SCPI_UNIT_HERTZ, /* mult */ 1e9},
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/* temperature */
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{/* name */ "CEL", /* unit */ SCPI_UNIT_CELSIUS, /* mult */ 1},
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/* time */
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{/* name */ "PS", /* unit */ SCPI_UNIT_SECONDS, /* mult */ 1e-12},
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{/* name */ "NS", /* unit */ SCPI_UNIT_SECONDS, /* mult */ 1e-9},
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{/* name */ "US", /* unit */ SCPI_UNIT_SECONDS, /* mult */ 1e-6},
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{/* name */ "MS", /* unit */ SCPI_UNIT_SECONDS, /* mult */ 1e-3},
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{/* name */ "S", /* unit */ SCPI_UNIT_SECONDS, /* mult */ 1},
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{/* name */ "MIN", /* unit */ SCPI_UNIT_SECONDS, /* mult */ 60},
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{/* name */ "HR", /* unit */ SCPI_UNIT_SECONDS, /* mult */ 3600},
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SCPI_UNITS_LIST_END,
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};
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/*
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* Special number values definition
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*/
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const scpi_special_number_def_t scpi_special_numbers_def[] = {
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{/* name */ "MINimum", /* type */ SCPI_NUM_MIN},
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{/* name */ "MAXimum", /* type */ SCPI_NUM_MAX},
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{/* name */ "DEFault", /* type */ SCPI_NUM_DEF},
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{/* name */ "UP", /* type */ SCPI_NUM_UP},
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{/* name */ "DOWN", /* type */ SCPI_NUM_DOWN},
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{/* name */ "NAN", /* type */ SCPI_NUM_NAN},
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{/* name */ "INFinity", /* type */ SCPI_NUM_INF},
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{/* name */ "NINF", /* type */ SCPI_NUM_NINF},
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SCPI_SPECIAL_NUMBERS_LIST_END,
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};
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/**
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* Match string constant to one of special number values
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* @param specs specifications of special numbers (patterns)
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* @param str string to be recognised
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* @param len length of string
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* @param value resultin value
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* @return TRUE if str matches one of specs patterns
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*/
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static scpi_bool_t translateSpecialNumber(const scpi_special_number_def_t * specs, const char * str, size_t len, scpi_number_parameter_t * value) {
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int i;
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value->value = 0.0;
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value->unit = SCPI_UNIT_NONE;
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value->type = SCPI_NUM_NUMBER;
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if (specs == NULL) {
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return FALSE;
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}
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for (i = 0; specs[i].name != NULL; i++) {
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if (matchPattern(specs[i].name, strlen(specs[i].name), str, len)) {
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value->type = specs[i].type;
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return TRUE;
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}
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}
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return FALSE;
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}
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/**
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* Convert special number type to its string representation
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* @param specs specifications of special numbers (patterns)
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* @param type type of special number
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* @return String representing special number or NULL
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*/
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static const char * translateSpecialNumberInverse(const scpi_special_number_def_t * specs, scpi_special_number_t type) {
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int i;
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if (specs == NULL) {
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return NULL;
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}
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for (i = 0; specs[i].name != NULL; i++) {
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if (specs[i].type == type) {
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return specs[i].name;
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}
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}
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return NULL;
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}
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/**
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* Convert string describing unit to its representation
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* @param units units patterns
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* @param unit text representation of unknown unit
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* @param len length of text representation
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* @return pointer of related unit definition or NULL
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*/
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static const scpi_unit_def_t * translateUnit(const scpi_unit_def_t * units, const char * unit, size_t len) {
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int i;
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if (units == NULL) {
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return NULL;
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}
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for (i = 0; units[i].name != NULL; i++) {
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if (compareStr(unit, len, units[i].name, strlen(units[i].name))) {
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return &units[i];
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}
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}
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return NULL;
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}
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/**
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* Convert unit definition to string
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* @param units units definitions (patterns)
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* @param unit type of unit
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* @return string representation of unit
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*/
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static const char * translateUnitInverse(const scpi_unit_def_t * units, const scpi_unit_t unit) {
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int i;
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if (units == NULL) {
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return NULL;
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}
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for (i = 0; units[i].name != NULL; i++) {
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if ((units[i].unit == unit) && (units[i].mult == 1)) {
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return units[i].name;
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}
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}
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return NULL;
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}
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/**
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* Transform number to base units
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* @param context
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* @param unit text representation of unit
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* @param len length of text representation
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* @param value preparsed numeric value
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* @return TRUE if value parameter was converted to base units
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*/
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static scpi_bool_t transformNumber(scpi_t * context, const char * unit, size_t len, scpi_number_parameter_t * value) {
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size_t s;
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const scpi_unit_def_t * unitDef;
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s = skipWhitespace(unit, len);
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if (s == len) {
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value->unit = SCPI_UNIT_NONE;
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return TRUE;
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}
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unitDef = translateUnit(context->units, unit + s, len - s);
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if (unitDef == NULL) {
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SCPI_ErrorPush(context, SCPI_ERROR_INVALID_SUFFIX);
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return FALSE;
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}
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value->value *= unitDef->mult;
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value->unit = unitDef->unit;
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return TRUE;
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}
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/**
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* Parse parameter as number, number with unit or special value (min, max, default, ...)
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* @param context
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* @param value return value
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* @param mandatory if the parameter is mandatory
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* @return
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*/
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scpi_bool_t SCPI_ParamTranslateNumberVal(scpi_t * context, scpi_parameter_t * parameter) {
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token_t token;
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lex_state_t state;
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state.buffer = parameter->data.ptr;
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state.pos = state.buffer;
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state.len = parameter->data.len;
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switch(parameter->type) {
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case TokDecimalNumericProgramDataWithSuffix:
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lexDecimalNumericProgramData(&state, &token);
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lexWhiteSpace(&state, &token);
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lexSuffixProgramData(&state, &token);
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return transformNumber(context, token.ptr, token.len, ¶meter->number);
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case TokProgramMnemonic:
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lexWhiteSpace(&state, &token);
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lexCharacterProgramData(&state, &token);
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/* convert string to special number type */
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return translateSpecialNumber(context->special_numbers, token.ptr, token.len, ¶meter->number);
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default:
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return FALSE;
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}
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}
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/**
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* Convert scpi_number_t to string
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* @param context
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* @param value number value
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* @param str target string
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* @param len max length of string
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* @return number of chars written to string
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*/
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size_t SCPI_NumberToStr(scpi_t * context, scpi_number_parameter_t * value, char * str, size_t len) {
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const char * type;
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const char * unit;
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size_t result;
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if (!value || !str) {
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return 0;
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}
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type = translateSpecialNumberInverse(context->special_numbers, value->type);
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if (type) {
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strncpy(str, type, len);
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return min(strlen(type), len);
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}
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result = doubleToStr(value->value, str, len);
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unit = translateUnitInverse(context->units, value->unit);
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if (unit) {
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strncat(str, " ", len);
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strncat(str, unit, len);
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result += strlen(unit) + 1;
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}
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return result;
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}
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