expr.c

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// SPDX-License-Identifier: GPL-2.0
#include "util/debug.h"
#include "util/expr.h"
#include "tests.h"
#include <stdlib.h>

static int test(struct parse_ctx *ctx, const char *e, double val2)
{
    double val;

    if (expr__parse(&val, ctx, &e))
        TEST_ASSERT_VAL("parse test failed", 0);
    TEST_ASSERT_VAL("unexpected value", val == val2);
    return 0;
}

int test__expr(struct test *t __maybe_unused, int subtest __maybe_unused)
{
    const char *p;
    const char **other;
    double val;
    int ret;
    struct parse_ctx ctx;
    int num_other;

    expr__ctx_init(&ctx);
    expr__add_id(&ctx, "FOO", 1);
    expr__add_id(&ctx, "BAR", 2);

    ret = test(&ctx, "1+1", 2);
    ret |= test(&ctx, "FOO+BAR", 3);
    ret |= test(&ctx, "(BAR/2)%2", 1);
    ret |= test(&ctx, "1 - -4",  5);
    ret |= test(&ctx, "(FOO-1)*2 + (BAR/2)%2 - -4",  5);
    ret |= test(&ctx, "1-1 | 1", 1);
    ret |= test(&ctx, "1-1 & 1", 0);
    ret |= test(&ctx, "min(1,2) + 1", 2);
    ret |= test(&ctx, "max(1,2) + 1", 3);
    ret |= test(&ctx, "1+1 if 3*4 else 0", 2);

    if (ret)
        return ret;

    p = "FOO/0";
    ret = expr__parse(&val, &ctx, &p);
    TEST_ASSERT_VAL("division by zero", ret == 1);

    p = "BAR/";
    ret = expr__parse(&val, &ctx, &p);
    TEST_ASSERT_VAL("missing operand", ret == 1);

    TEST_ASSERT_VAL("find other",
            expr__find_other("FOO + BAR + BAZ + BOZO", "FOO", &other, &num_other) == 0);
    TEST_ASSERT_VAL("find other", num_other == 3);
    TEST_ASSERT_VAL("find other", !strcmp(other[0], "BAR"));
    TEST_ASSERT_VAL("find other", !strcmp(other[1], "BAZ"));
    TEST_ASSERT_VAL("find other", !strcmp(other[2], "BOZO"));
    TEST_ASSERT_VAL("find other", other[3] == NULL);
    free((void *)other);

    return 0;
}