libcdsb/src/array/compute.c

/* This software is licensed by the MIT License, see LICENSE file */
/*                                Copyright © 2022 Gregory Lirent */

#include "include.h"
#include "../__internal/assert.h"

size_t array_nmemb(const arr_t* x) {
    return x->size*vtype_size(x->type);
}


hash_t array_hash(const arr_t* s) {
    hash_t hash = 0;

    if (s->size > 0)
        hash = vtype_hash(s->mem, s->type);

    if (s->size > 1)
        hash += vtype_hash(array_internal_at(s, s->size - 1), s->type);

    hash ^= s->size;

    return hash + VTYPE_ARRAY;
}


size_t libcdsb_array_count(const arr_t* s, const void* v, vtype t) {
    void   *p;
    void   *e;
    int   cmp;
    size_t  n;

    p = s->mem;
    e = array_end(s);
    n = 0;

    do {
        cmp = vtype_compare(p, s->type, v, t);

        if (cmp == 0) ++n;

        p += vtype_size(s->type);
    } while (p < e);

    return n;
}