Max 5 API Reference

jit.distance.manhattan.c

/*
 *  jit.distance.manhattan.c
 *
 *  Copyright 2001-2005 - Cycling '74
 *  Derek Gerstmann - derek@cycling74.com
 *
 *  Functor for calculating Manhattan distance
 *
 */

// --------------------------------------------------------------------------

#include "jit.common.h"
#include "jit.functor.h"

// --------------------------------------------------------------------------

typedef struct _jit_functor_distance_manhattan
{
    t_jit_object    ob;

} t_jit_functor_distance_manhattan;

// --------------------------------------------------------------------------

t_jit_object *jit_functor_distance_manhattan_new(void);
t_jit_err jit_functor_distance_manhattan_free(t_jit_functor_distance_manhattan *x);

t_jit_err jit_functor_distance_manhattan_recalc(t_jit_functor_distance_manhattan *x);

long jit_functor_distance_manhattan_eval_fixed(t_jit_functor_distance_manhattan *x, long dimcount, long *vals);
float jit_functor_distance_manhattan_eval_float32(t_jit_functor_distance_manhattan *x, long dimcount, float *vals);
double jit_functor_distance_manhattan_eval_float64(t_jit_functor_distance_manhattan *x, long dimcount, double *vals);

void jit_functor_distance_manhattan_fixlut_init(void);

t_class *_jit_functor_distance_manhattan_class;

// --------------------------------------------------------------------------

t_jit_err jit_functor_distance_manhattan_init(void)
{
    // create class
    _jit_functor_distance_manhattan_class = jit_class_new("jit_functor_distance_manhattan",
        (method)jit_functor_distance_manhattan_new,(method)jit_functor_distance_manhattan_free,
        sizeof(t_jit_functor_distance_manhattan),0L);

    // add evaluation methods
    jit_class_addmethod(_jit_functor_distance_manhattan_class, (method)jit_functor_distance_manhattan_eval_fixed,       "evalfixed",    A_CANT, 0L);
    jit_class_addmethod(_jit_functor_distance_manhattan_class, (method)jit_functor_distance_manhattan_eval_float32,     "evalfloat32",  A_CANT, 0L);
    jit_class_addmethod(_jit_functor_distance_manhattan_class, (method)jit_functor_distance_manhattan_eval_float64,     "evalfloat64",  A_CANT, 0L);

    // add functor to registry
    jit_functor_setup_class(_jit_functor_distance_manhattan_class,"distance","manhattan");
    jit_class_register(_jit_functor_distance_manhattan_class);

    return JIT_ERR_NONE;
}

t_jit_object *jit_functor_distance_manhattan_new(void)
{
    t_jit_functor_distance_manhattan *x;

    if (x = (t_jit_functor_distance_manhattan *)jit_object_alloc(_jit_functor_distance_manhattan_class)) {
        //initialization
        jit_functor_distance_manhattan_recalc(x);
    }

    return (t_jit_object *)x;
}

t_jit_err jit_functor_distance_manhattan_free(t_jit_functor_distance_manhattan *x)
{
    return JIT_ERR_NONE;
}

// --------------------------------------------------------------------------

t_jit_err jit_functor_distance_manhattan_recalc(t_jit_functor_distance_manhattan *x)
{
    // calculate intermediary values for efficiency
    return JIT_ERR_NONE;
}

// --------------------------------------------------------------------------

long jit_functor_distance_manhattan_eval_fixed(
    t_jit_functor_distance_manhattan *x, long dimcount, long *vals)
{
    return jit_functor_eval_fixed_with_float64((t_jit_object *)x,dimcount,vals,
            (t_jit_functor_float64_sig)jit_functor_distance_manhattan_eval_float64);
}

float jit_functor_distance_manhattan_eval_float32(
    t_jit_functor_distance_manhattan *x, long dimcount, float *vals)
{
    return jit_functor_eval_float32_with_float64((t_jit_object *)x,dimcount,vals,
            (t_jit_functor_float64_sig)jit_functor_distance_manhattan_eval_float64);
}

double jit_functor_distance_manhattan_eval_float64(
    t_jit_functor_distance_manhattan *x, long dimcount, double *vals)
{
    long i;
    double rval = 0;

    for (i=0;i<dimcount;i++) {
        rval += vals[i] > 0 ? vals[i] : -vals[i];
    }

    return rval;
}

// --------------------------------------------------------------------------

Copyright © 2008, Cycling '74