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core.math.value_limiter

Inputs

Name	Type	Title	Mandatory	Description
input	core.type.f64	Input	True	None

Outputs

Name	Type	Title	Description
output	core.type.f64	Output	None

Parameters

Name	Type	Title	Mandatory	Default value	Description
min	core.type.f64	Lower bound	True	None	None
max	core.type.f64	Upper bound	True	None	None

State variables

Function has no state variables

Usage XML code snippet

core_math_value_limiter snippet for FLOW configuration file

<f name="value_limiter" by_spec="core.math.value_limiter">
    <in alias="input">some_block_1/output</in>
    <param alias="min">0.0</param>
    <param alias="max">0.0</param>
</f>

Function’s artifacts

• Declaration for core_math_value_limiter
• Implementation for core_math_value_limiter
• Set parameters code for core_math_value_limiter
• Header of core_math_value_limiter
• Specification of core_math_value_limiter
• Other
  • Interface of core_math_value_limiter

declaration.py

from fspeclib import *


Function(
    name='core.math.value_limiter',
    title=LocalizedString(
        en='Value limiter'
    ),
    parameters=[
        Parameter(
            name='min',
            title='Lower bound',
            value_type='core.type.f64',
            tunable=True
        ),
        Parameter(
            name='max',
            title='Upper bound',
            value_type='core.type.f64',
            tunable=True
        )
    ],
    parameter_constraints=[
        ParameterValue('min') < ParameterValue('max')
    ],
    inputs=[
        Input(
            name='input',
            title='Input',
            value_type='core.type.f64'
        )
    ],
    outputs=[
        Output(
            name='output',
            title='Output',
            value_type='core.type.f64'
        )
    ]
)

core_math_value_limiter_exec.c

#include "core_math_value_limiter.h"

void core_math_value_limiter_exec(
    const core_math_value_limiter_inputs_t *i,
    core_math_value_limiter_outputs_t *o,
    const core_math_value_limiter_params_t *p
)
{
    if (i->input < p->min) {
        o->output = p->min;
    } else if (i->input > p->max) {
        o->output = p->max;
    } else {
        o->output = i->input;
    }
}

core_math_value_limiter_set_params.c

#include "core_math_value_limiter.h"
#include "conv.h"

#include <string.h>

#include "error.h"

fspec_rv_t core_math_value_limiter_set_params(
    core_math_value_limiter_params_t *params,
    const func_param_t *param_pairs,
    int initial_call
)
{
    // Get parameters
    core_math_value_limiter_params_t p = *params;

    core_math_value_limiter_params_flags_t flags;
    memset(&flags, 0, sizeof(flags));

    int violation_count = 0;
    conv_rv_t crv = conv_rv_ok;

    // Parse parameters
    for (int i = 0; param_pairs[i].alias != NULL; i++) {
        if (strcmp(param_pairs[i].alias, "min") == 0) {
            if ((crv = conv_str_double(param_pairs[i].value, &p.min)) == conv_rv_ok) {
                flags.changed_param_min = 1;
            }
        } else if (strcmp(param_pairs[i].alias, "max") == 0) {
            if ((crv = conv_str_double(param_pairs[i].value, &p.max)) == conv_rv_ok) {
                flags.changed_param_max = 1;
            }
        } else {
            error("failed unsupported parameter '%s'", param_pairs[i].alias);
            violation_count ++;
        }

        if (crv != conv_rv_ok) {
            error("Parameter '%s' format error (%s)", param_pairs[i].alias, param_pairs[i].value);
            violation_count++;
        }
    }

    if (initial_call) {
        // Check all mandatory parameters are set
        if (!flags.changed_param_min) {
            error("failed missed mandatory parameter 'min'");
            violation_count ++;
        }
        if (!flags.changed_param_max) {
            error("failed missed mandatory parameter 'max'");
            violation_count ++;
        }
    }

    if (violation_count > 0) {
        return fspec_rv_inval_param;
    }

    // Validate parameters
    if (!(p.min < p.max)) {
        error("failed constraint (min < max)");
        return fspec_rv_inval_param;
    }

    // Set parameters
    *params = p;

    return fspec_rv_ok;
}

core_math_value_limiter.h

/**
 *  Automatically-generated file. Do not edit!
 */

#ifndef FSPEC_CORE_MATH_VALUE_LIMITER_H
#define FSPEC_CORE_MATH_VALUE_LIMITER_H

#include <stdint.h>
#include <eswb/types.h>

#include "function.h"

/* Include declaration of dependency types */
#include "core_type_f64.h"

/**
 * @brief Parameters of `core.math.value_limiter` function
 */
typedef struct core_math_value_limiter_params_{
    core_type_f64_t min;  /// Lower bound
    core_type_f64_t max;  /// Upper bound
} core_math_value_limiter_params_t;

/**
 * @brief Inputs of `core.math.value_limiter` function
 */
typedef struct core_math_value_limiter_inputs_ {
    core_type_f64_t input;  /// Input

} core_math_value_limiter_inputs_t;

/**
 * @brief Outputs of `core.math.value_limiter` function
 */
typedef struct core_math_value_limiter_outputs_ {
    core_type_f64_t output; /// Output

} core_math_value_limiter_outputs_t;

/**
 * @brief Parameter flags of `core.math.value_limiter` function
 */
typedef struct core_math_value_limiter_params_flags_ {
    uint64_t changed_param_min:1;
    uint64_t changed_param_max:1;
} core_math_value_limiter_params_flags_t;

typedef struct core_math_value_limiter_eswb_descriptors_ {
    eswb_topic_descr_t in_input;
    eswb_topic_descr_t out_all;
} core_math_value_limiter_eswb_descriptors_t;

typedef struct core_math_value_limiter_interface_ {
    core_math_value_limiter_inputs_t i;
    core_math_value_limiter_outputs_t o;
    core_math_value_limiter_params_t p;
    core_math_value_limiter_eswb_descriptors_t eswb_descriptors;
} core_math_value_limiter_interface_t;

fspec_rv_t core_math_value_limiter_set_params(
    core_math_value_limiter_params_t *params,
    const func_param_t *param_pairs,
    int initial_call
);

void core_math_value_limiter_exec(
    const core_math_value_limiter_inputs_t *i,
    core_math_value_limiter_outputs_t *o,
    const core_math_value_limiter_params_t *p
);

#endif // FSPEC_CORE_MATH_VALUE_LIMITER_H

core_math_value_limiter_spec.c

/**
 *  Automatically-generated file. Do not edit!
 */

#include "core_math_value_limiter.h"
#include <eswb/types.h>

static const param_spec_t param_min = {
    .name = "min",
    .default_value = "0.0",
    .annotation = "Lower bound",
    .flags = 0
};

static const param_spec_t param_max = {
    .name = "max",
    .default_value = "0.0",
    .annotation = "Upper bound",
    .flags = 0
};

static const param_spec_t *params[3] = {
    &param_min,
    &param_max,
    NULL
};

static const input_spec_t i_input = {
    .name = "input",
    .annotation = "Input",
    .flags = 0
};

static const input_spec_t *inputs[2] = {
    &i_input,
    NULL
};

static const output_spec_t o_output = {
    .name = "output",
    .annotation = "Output",
    .flags = 0
};

static const output_spec_t *outputs[2] = {
    &o_output,
    NULL
};

fspec_rv_t core_math_value_limiter_call_init_inputs(
    void *dh,
    const func_conn_spec_t *conn_spec,
    eswb_topic_descr_t mounting_td
);

fspec_rv_t core_math_value_limiter_call_init_outputs(
    void *dh,
    const func_conn_spec_t *conn_spec,
    eswb_topic_descr_t mounting_td,
    const char *func_name
);

void core_math_value_limiter_call_exec(void *dh);

fspec_rv_t core_math_value_limiter_call_set_params(void *dh, const func_param_t *param_pairs, int initial_call);

const function_spec_t atomic_core_math_value_limiter_spec = {
    .name = "core.math.value_limiter",
    .annotation = "Value limiter",
    .inputs = inputs,
    .outputs = outputs,
    .params = params
};

const function_calls_t atomic_core_math_value_limiter_calls = {
    .interface_handle_size = sizeof(core_math_value_limiter_interface_t),
    .init = NULL,
    .init_inputs = core_math_value_limiter_call_init_inputs,
    .init_outputs = core_math_value_limiter_call_init_outputs,
    .pre_exec_init = NULL,
    .exec = core_math_value_limiter_call_exec,
    .set_params = core_math_value_limiter_call_set_params
};

const function_handler_t atomic_core_math_value_limiter_handler = {
    .spec = &atomic_core_math_value_limiter_spec,
    .calls = &atomic_core_math_value_limiter_calls,
    .extension_handler = NULL
};

core_math_value_limiter_interface.c

/**
 *  Automatically-generated file. Do not edit!
 */

#include "core_math_value_limiter.h"

#include "error.h"
#include <eswb/api.h>
#include <eswb/topic_proclaiming_tree.h>
#include <eswb/errors.h>

int core_math_value_limiter_interface_inputs_init(
    core_math_value_limiter_interface_t *interface,
    const func_conn_spec_t *conn_spec,
    eswb_topic_descr_t mounting_td
)
{
    eswb_rv_t rv;
    int errcnt_no_topic = 0;
    int errcnt_no_input = 0;
    const char *topic_path_in_input = fspec_find_path2connect(conn_spec,"input");

    // Connecting mandatory input "input"
    if (topic_path_in_input != NULL) {
        rv = eswb_connect_nested(mounting_td, topic_path_in_input, &interface->eswb_descriptors.in_input);
        if(rv != eswb_e_ok) {
            error("failed connect input \"input\" to topic \"%s\": %s", topic_path_in_input, eswb_strerror(rv));
            errcnt_no_topic++;
        }
    } else {
        error("mandatory input \"input\" is not speicifed");
        errcnt_no_input++;
    }

    if ((errcnt_no_input > 0) || (errcnt_no_topic > 0)) {
        if (errcnt_no_input > errcnt_no_topic) {
            return fspec_rv_no_input;
        } else {
            return fspec_rv_no_topic;
        }
    }
    return fspec_rv_ok;
}

fspec_rv_t core_math_value_limiter_interface_inputs_update(core_math_value_limiter_interface_t *interface)
{
    eswb_rv_t rv;

    rv = eswb_read(interface->eswb_descriptors.in_input, &interface->i.input);
    if(rv != eswb_e_ok) {
        /*FIXME nothing to do yet*/
    }

    return 0;
}

fspec_rv_t core_math_value_limiter_interface_outputs_init(
    core_math_value_limiter_interface_t *interface,
    const func_conn_spec_t *conn_spec,
    eswb_topic_descr_t mounting_td,
    const char *func_name
)
{
    TOPIC_TREE_CONTEXT_LOCAL_DEFINE(cntx, 2);
    core_math_value_limiter_outputs_t out;
    eswb_rv_t rv;

    topic_proclaiming_tree_t *rt = usr_topic_set_struct(cntx, out, func_name);

    usr_topic_add_struct_child(cntx, rt, core_math_value_limiter_outputs_t, output, "output", tt_double);
    rv = eswb_proclaim_tree(mounting_td, rt, cntx->t_num, &interface->eswb_descriptors.out_all);
    if (rv != eswb_e_ok) {
        return fspec_rv_publish_err;
    }

    return fspec_rv_ok;
}

fspec_rv_t core_math_value_limiter_interface_outputs_update(core_math_value_limiter_interface_t *interface)
{
    eswb_rv_t rv;

    rv = eswb_update_topic(interface->eswb_descriptors.out_all, &interface->o);
    if (rv != eswb_e_ok) {
        return 1;
    }

    return 0;
}

void core_math_value_limiter_interface_update(core_math_value_limiter_interface_t *interface)
{
    core_math_value_limiter_interface_inputs_update(interface);
    core_math_value_limiter_exec(&interface->i, &interface->o, &interface->p);
    core_math_value_limiter_interface_outputs_update(interface);
}

fspec_rv_t core_math_value_limiter_call_set_params(void *dh, const func_param_t *param_pairs, int initial_call)
{
    core_math_value_limiter_interface_t *interface = (core_math_value_limiter_interface_t*) dh;
    return core_math_value_limiter_set_params(&interface->p, param_pairs, initial_call);
}

fspec_rv_t core_math_value_limiter_call_init_inputs(
    void *dh,
    const func_conn_spec_t *conn_spec,
    eswb_topic_descr_t mounting_td
)
{
    core_math_value_limiter_interface_t *interface = (core_math_value_limiter_interface_t*) dh;
    return core_math_value_limiter_interface_inputs_init(interface, conn_spec, mounting_td);
}

fspec_rv_t core_math_value_limiter_call_init_outputs(
    void *dh,
    const func_conn_spec_t *conn_spec,
    eswb_topic_descr_t mounting_td,
    const char *func_name
)
{
    core_math_value_limiter_interface_t *interface = (core_math_value_limiter_interface_t*) dh;
    return core_math_value_limiter_interface_outputs_init(interface, conn_spec, mounting_td, func_name);
}

void core_math_value_limiter_call_exec(void *dh)
{
    core_math_value_limiter_interface_t *interface = (core_math_value_limiter_interface_t*) dh;
    core_math_value_limiter_interface_update(interface);
}

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