liba 0.1.15

An algorithm library based on C/C++
Documentation 
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#define MAIN(x) a##x
#include "test.h"
#include <stdlib.h>

static void test_sq(void)
{
    A_BUILD_ASSERT(A_SQ(+2) == 4);
    A_BUILD_ASSERT(A_SQ(-2) == 4);
}

static void test_abs(void)
{
    A_BUILD_ASSERT(A_ABS(+1) > 0);
    A_BUILD_ASSERT(A_ABS(-1) > 0);
    A_BUILD_ASSERT(A_ABS_(+1, -1) > 0);
    A_BUILD_ASSERT(A_ABS_(-1, +1) > 0);
}

static void test_min(void)
{
    A_BUILD_ASSERT(A_MIN(0, 1) == 0);
    A_BUILD_ASSERT(A_MIN(1, 0) == 0);
}

static void test_max(void)
{
    A_BUILD_ASSERT(A_MAX(0, 1) == 1);
    A_BUILD_ASSERT(A_MAX(1, 0) == 1);
}

static void test_sgn(void)
{
    A_BUILD_ASSERT(A_SGN(0) == 0);
    A_BUILD_ASSERT(A_SGN(+10) == +1);
    A_BUILD_ASSERT(A_SGN(-10) == -1);
    A_BUILD_ASSERT(A_SGN_(0, 0) == 0);
    A_BUILD_ASSERT(A_SGN_(+1, -1) == +1);
    A_BUILD_ASSERT(A_SGN_(-1, +1) == -1);
}

static void test_sat(void)
{
    A_BUILD_ASSERT(A_SAT(0, -10, +10) == 0);
    A_BUILD_ASSERT(A_SAT(+100, -10, +10) <= +10);
    A_BUILD_ASSERT(A_SAT(-100, -10, +10) >= -10);
}

static void test_for(int argc, char *argv[])
{
    unsigned int n = 10;
    if (argc > 1)
    {
        char *endptr = A_NULL;
        unsigned long l = strtoul(argv[1], &endptr, 0);
        if (l > n) { n = a_cast_s(unsigned int, l); }
    }

    int *p = a_new(int, A_NULL, n);
    int *d = p + n;
    A_ASSUME(p);

    a_forenum(unsigned int, i, n)
    {
        p[i] = a_cast_s(int, i);
        debug("%u ", i);
    }
    debug("\n");

    a_foreach(int, *, it, p, n) { debug("%i ", *it); }
    debug("\n");

    a_iterate(int, *, it, p, d) { debug("%i ", *it); }
    debug("\n");

    a_forenum_reverse(unsigned int, i, n)
    {
        p[i] = a_cast_s(int, i);
        debug("%u ", i);
    }
    debug("\n");

    a_foreach_reverse(int, *, it, p, n) { debug("%i ", *it); }
    debug("\n");

    a_iterate_reverse(int, *, it, p, d) { debug("%i ", *it); }
    debug("\n");

    a_die(p);
}

static void test_swap(int argc, char *argv[])
{
    a_u64 lhs = 0;
    a_u64 rhs = A_U64_MAX;
    debug("0x%016" PRIX64 " 0x%016" PRIX64 " -> ", lhs, rhs);
    a_swap(&lhs, &rhs, 1);
    debug("0x%016" PRIX64 " 0x%016" PRIX64 "  \n", lhs, rhs);
    debug("0x%016" PRIX64 " 0x%016" PRIX64 " -> ", lhs, rhs);
    a_swap(&lhs, &rhs, 2);
    debug("0x%016" PRIX64 " 0x%016" PRIX64 "  \n", lhs, rhs);
    debug("0x%016" PRIX64 " 0x%016" PRIX64 " -> ", lhs, rhs);
    a_swap(&lhs, &rhs, 4);
    debug("0x%016" PRIX64 " 0x%016" PRIX64 "  \n", lhs, rhs);
    debug("0x%016" PRIX64 " 0x%016" PRIX64 " -> ", lhs, rhs);
    a_swap(&lhs, &rhs, 8);
    debug("0x%016" PRIX64 " 0x%016" PRIX64 "  \n", lhs, rhs);
    (void)argc;
    (void)argv;
}

static void test_push(int argc, char *argv[])
{
    a_float array[] = {0, 1, 2, 3, 4, 5, 6, 7};
    for (a_size i = 0; i < A_LEN(array); ++i)
    {
        debug(A_FLOAT_PRI("+", "g") "%c", array[i], i + 1 < A_LEN(array) ? ' ' : '\n');
    }
    a_float_push_fore(array, A_LEN(array), -1);
    for (a_size i = 0; i < A_LEN(array); ++i)
    {
        debug(A_FLOAT_PRI("+", "g") "%c", array[i], i + 1 < A_LEN(array) ? ' ' : '\n');
    }
    a_float_push_back(array, A_LEN(array), -1);
    for (a_size i = 0; i < A_LEN(array); ++i)
    {
        debug(A_FLOAT_PRI("+", "g") "%c", array[i], i + 1 < A_LEN(array) ? ' ' : '\n');
    }
    {
        a_float cache[] = {-1, -2};
        a_float_push_fore_(array, A_LEN(array), cache, A_LEN(cache));
    }
    for (a_size i = 0; i < A_LEN(array); ++i)
    {
        debug(A_FLOAT_PRI("+", "g") "%c", array[i], i + 1 < A_LEN(array) ? ' ' : '\n');
    }
    {
        a_float cache[] = {-2, -1};
        a_float_push_back_(array, A_LEN(array), cache, A_LEN(cache));
    }
    for (a_size i = 0; i < A_LEN(array); ++i)
    {
        debug(A_FLOAT_PRI("+", "g") "%c", array[i], i + 1 < A_LEN(array) ? ' ' : '\n');
    }
    {
        a_float cache[] = {-0, -1, -2, -3, -4, -5, -6, -7, -8, -9};
        a_float_push_fore_(array, A_LEN(array), cache, A_LEN(cache));
    }
    for (a_size i = 0; i < A_LEN(array); ++i)
    {
        debug(A_FLOAT_PRI("+", "g") "%c", array[i], i + 1 < A_LEN(array) ? ' ' : '\n');
    }
    {
        a_float cache[] = {-9, -8, -7, -6, -5, -4, -3, -2, -1, -0};
        a_float_push_fore_(array, A_LEN(array), cache, A_LEN(cache));
    }
    for (a_size i = 0; i < A_LEN(array); ++i)
    {
        debug(A_FLOAT_PRI("+", "g") "%c", array[i], i + 1 < A_LEN(array) ? ' ' : '\n');
    }
    (void)argc;
    (void)argv;
}

static void test_roll(int argc, char *argv[])
{
    a_float array[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
    a_float shift[16];
    for (a_size i = 0; i < A_LEN(array); ++i)
    {
        debug(A_FLOAT_PRI(, "g") "%c", array[i], i + 1 < A_LEN(array) ? ' ' : '\n');
    }
    a_float_roll_fore(array, A_LEN(array));
    for (a_size i = 0; i < A_LEN(array); ++i)
    {
        debug(A_FLOAT_PRI(, "g") "%c", array[i], i + 1 < A_LEN(array) ? ' ' : '\n');
    }
    a_float_roll_back(array, A_LEN(array));
    for (a_size i = 0; i < A_LEN(array); ++i)
    {
        debug(A_FLOAT_PRI(, "g") "%c", array[i], i + 1 < A_LEN(array) ? ' ' : '\n');
    }
    a_float_roll_fore_(array, A_LEN(array), shift, 2);
    for (a_size i = 0; i < A_LEN(array); ++i)
    {
        debug(A_FLOAT_PRI(, "g") "%c", array[i], i + 1 < A_LEN(array) ? ' ' : '\n');
    }
    a_float_roll_back_(array, A_LEN(array), shift, 2);
    for (a_size i = 0; i < A_LEN(array); ++i)
    {
        debug(A_FLOAT_PRI(, "g") "%c", array[i], i + 1 < A_LEN(array) ? ' ' : '\n');
    }
    a_float_roll_fore_(array, A_LEN(array), shift, 15);
    for (a_size i = 0; i < A_LEN(array); ++i)
    {
        debug(A_FLOAT_PRI(, "g") "%c", array[i], i + 1 < A_LEN(array) ? ' ' : '\n');
    }
    a_float_roll_back_(array, A_LEN(array), shift, 15);
    for (a_size i = 0; i < A_LEN(array); ++i)
    {
        debug(A_FLOAT_PRI(, "g") "%c", array[i], i + 1 < A_LEN(array) ? ' ' : '\n');
    }
    (void)argc;
    (void)argv;
}

static void test_mean(int argc, char *argv[])
{
    a_size const n = a_cast_s(a_size, argc);
    a_float *p = a_new(a_float, A_NULL, n);
    for (a_size i = 0; i < n; ++i)
    {
        char *endptr;
        p[i] = strtonum(argv[i], &endptr);
    }

    debug("{");
    for (a_size i = 0; i < n; ++i)
    {
        debug("%c" A_FLOAT_PRI("", "g"), i ? ',' : 0, p[i]);
    }
    debug("}:" A_FLOAT_PRI("", "g\n"), a_float_mean(p, n));

    a_die(p);
}

static void test_sum(int argc, char *argv[])
{
    a_size const n = a_cast_s(a_size, argc);
    a_float *p = a_new(a_float, A_NULL, n);
    for (a_size i = 0; i < n; ++i)
    {
        char *endptr;
        p[i] = strtonum(argv[i], &endptr);
    }

    debug("{");
    for (a_size i = 0; i < n; ++i)
    {
        debug("%c" A_FLOAT_PRI("", "g"), i ? ',' : 0, p[i]);
    }
    debug("}:" A_FLOAT_PRI("", "g,") A_FLOAT_PRI("", "g,") A_FLOAT_PRI("", "g\n"),
          a_float_sum(p, n), a_float_sum1(p, n), a_float_sum2(p, n));

    a_die(p);
}

static void test_hash_bkdr(int argc, char *argv[])
{
    for (int idx = 1; idx < argc; ++idx)
    {
        debug("case 0x%08" PRIX32 ": // %s\n    break;\n", a_hash_bkdr(argv[idx], 0), argv[idx]);
    }
}

static void test_hash_sdbm(int argc, char *argv[])
{
    for (int idx = 1; idx < argc; ++idx)
    {
        debug("case 0x%08" PRIX32 ": // %s\n    break;\n", a_hash_sdbm(argv[idx], 0), argv[idx]);
    }
}

int main(int argc, char *argv[]) // NOLINT(misc-definitions-in-headers)
{
    test_sq();
    test_min();
    test_max();
    test_abs();
    test_sgn();
    test_sat();
    if (argc < 2)
    {
        test_for(argc, argv);
        test_swap(argc, argv);
        test_push(argc, argv);
        test_roll(argc, argv);
        test_hash_bkdr(argc, argv);
        test_hash_sdbm(argc, argv);
        test_sum(argc - 1, argv + 1);
        test_mean(argc - 1, argv + 1);
        return 0;
    }
    switch (a_hash_bkdr(argv[1], 0))
    {
    case 0x001AEED5: // for
        test_for(argc - 1, argv + 1);
        break;
    case 0x001E5957: // sum
        test_sum(argc - 2, argv + 2);
        break;
    case 0x0F8837E3: // swap
        test_swap(argc - 1, argv + 1);
        break;
    case 0x0F20D22E: // push
        test_push(argc - 1, argv + 1);
        break;
    case 0x0F63D79D: // roll
        test_roll(argc - 1, argv + 1);
        break;
    case 0x0EB5AF9D: // mean
        test_mean(argc - 2, argv + 2);
        break;
    case 0x0E0928A2: // hash
    case 0x57614C8C: // hash_bkdr
        test_hash_bkdr(argc - 1, argv + 1);
        break;
    case 0x59A69D8D: // hash_sdbm
        test_hash_sdbm(argc - 1, argv + 1);
        break;
    default:
        debug("for\n");
        debug("sum\n");
        debug("swap\n");
        debug("save\n");
        debug("roll\n");
        debug("mean\n");
        debug("hash_bkdr\n");
        debug("hash_sdbm\n");
    }
    return 0;
}