SDL/test/testautomation_stdlib.c

/**
 * Standard C library routine test suite
 */
#include <SDL3/SDL.h>
#include <SDL3/SDL_test.h>

/* Test case functions */

/**
 * @brief Call to SDL_strlcpy
 */
#undef SDL_strlcpy
int stdlib_strlcpy(void *arg)
{
    size_t result;
    char text[1024];
    const char *expected;

    result = SDL_strlcpy(text, "foo", sizeof(text));
    expected = "foo";
    SDLTest_AssertPass("Call to SDL_strlcpy(\"foo\")");
    SDLTest_AssertCheck(SDL_strcmp(text, expected) == 0, "Check text, expected: %s, got: %s", expected, text);
    SDLTest_AssertCheck(result == SDL_strlen(text), "Check result value, expected: %d, got: %d", (int)SDL_strlen(text), (int)result);

    result = SDL_strlcpy(text, "foo", 2);
    expected = "f";
    SDLTest_AssertPass("Call to SDL_strlcpy(\"foo\") with buffer size 2");
    SDLTest_AssertCheck(SDL_strcmp(text, expected) == 0, "Check text, expected: %s, got: %s", expected, text);
    SDLTest_AssertCheck(result == 3, "Check result value, expected: 3, got: %d", (int)result);

    return TEST_COMPLETED;
}

#if defined(HAVE_WFORMAT) || defined(HAVE_WFORMAT_EXTRA_ARGS)
#pragma GCC diagnostic push
#if defined(HAVE_WFORMAT)
#pragma GCC diagnostic ignored "-Wformat"
#endif
#if defined(HAVE_WFORMAT_EXTRA_ARGS)
#pragma GCC diagnostic ignored "-Wformat-extra-args"
#endif
#endif

/**
 * @brief Call to SDL_snprintf
 */
#undef SDL_snprintf
int stdlib_snprintf(void *arg)
{
    int result;
    int predicted;
    char text[1024];
    const char *expected;
    size_t size;

    result = SDL_snprintf(text, sizeof(text), "%s", "foo");
    expected = "foo";
    SDLTest_AssertPass("Call to SDL_snprintf(\"%%s\", \"foo\")");
    SDLTest_AssertCheck(SDL_strcmp(text, expected) == 0, "Check text, expected: %s, got: %s", expected, text);
    SDLTest_AssertCheck(result == SDL_strlen(text), "Check result value, expected: %d, got: %d", (int)SDL_strlen(text), result);

    result = SDL_snprintf(text, 2, "%s", "foo");
    expected = "f";
    SDLTest_AssertPass("Call to SDL_snprintf(\"%%s\", \"foo\") with buffer size 2");
    SDLTest_AssertCheck(SDL_strcmp(text, expected) == 0, "Check text, expected: %s, got: %s", expected, text);
    SDLTest_AssertCheck(result == 3, "Check result value, expected: 3, got: %d", result);

    result = SDL_snprintf(NULL, 0, "%s", "foo");
    SDLTest_AssertPass("Call to SDL_snprintf(NULL, 0, \"%%s\", \"foo\")");
    SDLTest_AssertCheck(result == 3, "Check result value, expected: 3, got: %d", result);

    result = SDL_snprintf(text, 2, "%s\n", "foo");
    expected = "f";
    SDLTest_AssertPass("Call to SDL_snprintf(\"%%s\\n\", \"foo\") with buffer size 2");
    SDLTest_AssertCheck(SDL_strcmp(text, expected) == 0, "Check text, expected: %s, got: %s", expected, text);
    SDLTest_AssertCheck(result == 4, "Check result value, expected: 4, got: %d", result);

    result = SDL_snprintf(text, sizeof(text), "%f", 0.0);
    predicted = SDL_snprintf(NULL, 0, "%f", 0.0);
    expected = "0.000000";
    SDLTest_AssertPass("Call to SDL_snprintf(\"%%f\", 0.0)");
    SDLTest_AssertCheck(SDL_strcmp(text, expected) == 0, "Check text, expected: %s, got: %s", expected, text);
    SDLTest_AssertCheck(result == SDL_strlen(text), "Check result value, expected: %d, got: %d", (int)SDL_strlen(text), result);
    SDLTest_AssertCheck(predicted == result, "Check predicted value, expected: %d, got: %d", result, predicted);

    result = SDL_snprintf(text, sizeof(text), "%f", 1.0);
    predicted = SDL_snprintf(NULL, 0, "%f", 1.0);
    expected = "1.000000";
    SDLTest_AssertPass("Call to SDL_snprintf(\"%%f\", 1.0)");
    SDLTest_AssertCheck(SDL_strcmp(text, expected) == 0, "Check text, expected: %s, got: %s", expected, text);
    SDLTest_AssertCheck(result == SDL_strlen(text), "Check result value, expected: %d, got: %d", (int)SDL_strlen(text), result);
    SDLTest_AssertCheck(predicted == result, "Check predicted value, expected: %d, got: %d", result, predicted);

    result = SDL_snprintf(text, sizeof(text), "%.f", 1.0);
    predicted = SDL_snprintf(NULL, 0, "%.f", 1.0);
    expected = "1";
    SDLTest_AssertPass("Call to SDL_snprintf(\"%%.f\", 1.0)");
    SDLTest_AssertCheck(SDL_strcmp(text, expected) == 0, "Check text, expected: %s, got: %s", expected, text);
    SDLTest_AssertCheck(result == SDL_strlen(text), "Check result value, expected: %d, got: %d", (int)SDL_strlen(text), result);
    SDLTest_AssertCheck(predicted == result, "Check predicted value, expected: %d, got: %d", result, predicted);

    result = SDL_snprintf(text, sizeof(text), "%#.f", 1.0);
    predicted = SDL_snprintf(NULL, 0, "%#.f", 1.0);
    expected = "1.";
    SDLTest_AssertPass("Call to SDL_snprintf(\"%%#.f\", 1.0)");
    SDLTest_AssertCheck(SDL_strcmp(text, expected) == 0, "Check text, expected: %s, got: %s", expected, text);
    SDLTest_AssertCheck(result == SDL_strlen(text), "Check result value, expected: %d, got: %d", (int)SDL_strlen(text), result);
    SDLTest_AssertCheck(predicted == result, "Check predicted value, expected: %d, got: %d", result, predicted);

    result = SDL_snprintf(text, sizeof(text), "%f", 1.0 + 1.0 / 3.0);
    predicted = SDL_snprintf(NULL, 0, "%f", 1.0 + 1.0 / 3.0);
    expected = "1.333333";
    SDLTest_AssertPass("Call to SDL_snprintf(\"%%f\", 1.0 + 1.0 / 3.0)");
    SDLTest_AssertCheck(SDL_strcmp(text, expected) == 0, "Check text, expected: %s, got: %s", expected, text);
    SDLTest_AssertCheck(result == SDL_strlen(text), "Check result value, expected: %d, got: %d", (int)SDL_strlen(text), result);
    SDLTest_AssertCheck(predicted == result, "Check predicted value, expected: %d, got: %d", result, predicted);

    result = SDL_snprintf(text, sizeof(text), "%+f", 1.0 + 1.0 / 3.0);
    predicted = SDL_snprintf(NULL, 0, "%+f", 1.0 + 1.0 / 3.0);
    expected = "+1.333333";
    SDLTest_AssertPass("Call to SDL_snprintf(\"%%+f\", 1.0 + 1.0 / 3.0)");
    SDLTest_AssertCheck(SDL_strcmp(text, expected) == 0, "Check text, expected: %s, got: %s", expected, text);
    SDLTest_AssertCheck(result == SDL_strlen(text), "Check result value, expected: %d, got: %d", (int)SDL_strlen(text), result);
    SDLTest_AssertCheck(predicted == result, "Check predicted value, expected: %d, got: %d", result, predicted);

    result = SDL_snprintf(text, sizeof(text), "%.2f", 1.0 + 1.0 / 3.0);
    predicted = SDL_snprintf(NULL, 0, "%.2f", 1.0 + 1.0 / 3.0);
    expected = "1.33";
    SDLTest_AssertPass("Call to SDL_snprintf(\"%%.2f\", 1.0 + 1.0 / 3.0)");
    SDLTest_AssertCheck(SDL_strcmp(text, expected) == 0, "Check text, expected: %s, got: %s", expected, text);
    SDLTest_AssertCheck(result == SDL_strlen(text), "Check result value, expected: %d, got: %d", (int)SDL_strlen(text), result);
    SDLTest_AssertCheck(predicted == result, "Check predicted value, expected: %d, got: %d", result, predicted);

    result = SDL_snprintf(text, sizeof(text), "%6.2f", 1.0 + 1.0 / 3.0);
    predicted = SDL_snprintf(NULL, 0, "%6.2f", 1.0 + 1.0 / 3.0);
    expected = "  1.33";
    SDLTest_AssertPass("Call to SDL_snprintf(\"%%6.2f\", 1.0 + 1.0 / 3.0)");
    SDLTest_AssertCheck(SDL_strcmp(text, expected) == 0, "Check text, expected: '%s', got: '%s'", expected, text);
    SDLTest_AssertCheck(result == SDL_strlen(text), "Check result value, expected: %d, got: %d", (int)SDL_strlen(text), result);
    SDLTest_AssertCheck(predicted == result, "Check predicted value, expected: %d, got: %d", result, predicted);

    result = SDL_snprintf(text, sizeof(text), "%06.2f", 1.0 + 1.0 / 3.0);
    predicted = SDL_snprintf(NULL, 0, "%06.2f", 1.0 + 1.0 / 3.0);
    expected = "001.33";
    SDLTest_AssertPass("Call to SDL_snprintf(\"%%06.2f\", 1.0 + 1.0 / 3.0)");
    SDLTest_AssertCheck(SDL_strcmp(text, expected) == 0, "Check text, expected: '%s', got: '%s'", expected, text);
    SDLTest_AssertCheck(result == SDL_strlen(text), "Check result value, expected: %d, got: %d", (int)SDL_strlen(text), result);
    SDLTest_AssertCheck(predicted == result, "Check predicted value, expected: %d, got: %d", result, predicted);

    result = SDL_snprintf(text, 5, "%06.2f", 1.0 + 1.0 / 3.0);
    expected = "001.";
    SDLTest_AssertPass("Call to SDL_snprintf(\"%%06.2f\", 1.0 + 1.0 / 3.0) with buffer size 5");
    SDLTest_AssertCheck(SDL_strcmp(text, expected) == 0, "Check text, expected: '%s', got: '%s'", expected, text);
    SDLTest_AssertCheck(result == 6, "Check result value, expected: 6, got: %d", result);

    result = SDL_snprintf(text, sizeof(text), "%g", 100.0);
    expected = "100";
    SDLTest_AssertPass("Call to SDL_snprintf(\"%%g\", 100.0)");
    SDLTest_AssertCheck(SDL_strcmp(text, expected) == 0, "Check text, expected: '%s', got: '%s'", expected, text);
    SDLTest_AssertCheck(result == 3, "Check result value, expected: 3, got: %d", result);

    result = SDL_snprintf(text, sizeof(text), "%g", 100.75);
    expected = "100.75";
    SDLTest_AssertPass("Call to SDL_snprintf(\"%%g\", 100.75)");
    SDLTest_AssertCheck(SDL_strcmp(text, expected) == 0, "Check text, expected: '%s', got: '%s'", expected, text);
    SDLTest_AssertCheck(result == 6, "Check result value, expected: 6, got: %d", result);

    size = 64;
    result = SDL_snprintf(text, sizeof(text), "%zu %s", size, "test");
    expected = "64 test";
    SDLTest_AssertPass("Call to SDL_snprintf(text, sizeof(text), \"%%zu %%s\", size, \"test\")");
    SDLTest_AssertCheck(SDL_strcmp(text, expected) == 0, "Check text, expected: '%s', got: '%s'", expected, text);
    SDLTest_AssertCheck(result == 7, "Check result value, expected: 7, got: %d", result);

    return TEST_COMPLETED;
}

#if defined(HAVE_WFORMAT) || defined(HAVE_WFORMAT_EXTRA_ARGS)
#pragma GCC diagnostic pop
#endif

/**
 * @brief Call to SDL_getenv and SDL_setenv
 */
int stdlib_getsetenv(void *arg)
{
    const int nameLen = 16;
    char name[17];
    int counter;
    int result;
    char *value1;
    char *value2;
    char *expected;
    int overwrite;
    char *text;

    /* Create a random name. This tests SDL_getenv, since we need to */
    /* make sure the variable is not set yet (it shouldn't). */
    do {
        for (counter = 0; counter < nameLen; counter++) {
            name[counter] = (char)SDLTest_RandomIntegerInRange(65, 90);
        }
        name[nameLen] = '\0';

        text = SDL_getenv(name);
        SDLTest_AssertPass("Call to SDL_getenv('%s')", name);
        if (text != NULL) {
            SDLTest_Log("Expected: NULL, Got: '%s' (%i)", text, (int)SDL_strlen(text));
        }
    } while (text != NULL);

    /* Create random values to set */
    value1 = SDLTest_RandomAsciiStringOfSize(10);
    value2 = SDLTest_RandomAsciiStringOfSize(10);

    /* Set value 1 without overwrite */
    overwrite = 0;
    expected = value1;
    result = SDL_setenv(name, value1, overwrite);
    SDLTest_AssertPass("Call to SDL_setenv('%s','%s', %i)", name, value1, overwrite);
    SDLTest_AssertCheck(result == 0, "Check result, expected: 0, got: %i", result);

    /* Check value */
    text = SDL_getenv(name);
    SDLTest_AssertPass("Call to SDL_getenv('%s')", name);
    SDLTest_AssertCheck(text != NULL, "Verify returned text is not NULL");
    if (text != NULL) {
        SDLTest_AssertCheck(
            SDL_strcmp(text, expected) == 0,
            "Verify returned text, expected: %s, got: %s",
            expected,
            text);
    }

    /* Set value 2 with overwrite */
    overwrite = 1;
    expected = value2;
    result = SDL_setenv(name, value2, overwrite);
    SDLTest_AssertPass("Call to SDL_setenv('%s','%s', %i)", name, value2, overwrite);
    SDLTest_AssertCheck(result == 0, "Check result, expected: 0, got: %i", result);

    /* Check value */
    text = SDL_getenv(name);
    SDLTest_AssertPass("Call to SDL_getenv('%s')", name);
    SDLTest_AssertCheck(text != NULL, "Verify returned text is not NULL");
    if (text != NULL) {
        SDLTest_AssertCheck(
            SDL_strcmp(text, expected) == 0,
            "Verify returned text, expected: %s, got: %s",
            expected,
            text);
    }

    /* Set value 1 without overwrite */
    overwrite = 0;
    expected = value2;
    result = SDL_setenv(name, value1, overwrite);
    SDLTest_AssertPass("Call to SDL_setenv('%s','%s', %i)", name, value1, overwrite);
    SDLTest_AssertCheck(result == 0, "Check result, expected: 0, got: %i", result);

    /* Check value */
    text = SDL_getenv(name);
    SDLTest_AssertPass("Call to SDL_getenv('%s')", name);
    SDLTest_AssertCheck(text != NULL, "Verify returned text is not NULL");
    if (text != NULL) {
        SDLTest_AssertCheck(
            SDL_strcmp(text, expected) == 0,
            "Verify returned text, expected: %s, got: %s",
            expected,
            text);
    }

    /* Set value 1 without overwrite */
    overwrite = 1;
    expected = value1;
    result = SDL_setenv(name, value1, overwrite);
    SDLTest_AssertPass("Call to SDL_setenv('%s','%s', %i)", name, value1, overwrite);
    SDLTest_AssertCheck(result == 0, "Check result, expected: 0, got: %i", result);

    /* Check value */
    text = SDL_getenv(name);
    SDLTest_AssertPass("Call to SDL_getenv('%s')", name);
    SDLTest_AssertCheck(text != NULL, "Verify returned text is not NULL");
    if (text != NULL) {
        SDLTest_AssertCheck(
            SDL_strcmp(text, expected) == 0,
            "Verify returned text, expected: %s, got: %s",
            expected,
            text);
    }

    /* Negative cases */
    for (overwrite = 0; overwrite <= 1; overwrite++) {
        result = SDL_setenv(NULL, value1, overwrite);
        SDLTest_AssertPass("Call to SDL_setenv(NULL,'%s', %i)", value1, overwrite);
        SDLTest_AssertCheck(result == -1, "Check result, expected: -1, got: %i", result);
        result = SDL_setenv("", value1, overwrite);
        SDLTest_AssertPass("Call to SDL_setenv('','%s', %i)", value1, overwrite);
        SDLTest_AssertCheck(result == -1, "Check result, expected: -1, got: %i", result);
        result = SDL_setenv("=", value1, overwrite);
        SDLTest_AssertPass("Call to SDL_setenv('=','%s', %i)", value1, overwrite);
        SDLTest_AssertCheck(result == -1, "Check result, expected: -1, got: %i", result);
        result = SDL_setenv(name, NULL, overwrite);
        SDLTest_AssertPass("Call to SDL_setenv('%s', NULL, %i)", name, overwrite);
        SDLTest_AssertCheck(result == -1, "Check result, expected: -1, got: %i", result);
    }

    /* Clean up */
    SDL_free(value1);
    SDL_free(value2);

    return TEST_COMPLETED;
}

#if defined(HAVE_WFORMAT) || defined(HAVE_WFORMAT_EXTRA_ARGS)
#pragma GCC diagnostic push
#if defined(HAVE_WFORMAT)
#pragma GCC diagnostic ignored "-Wformat"
#endif
#if defined(HAVE_WFORMAT_EXTRA_ARGS)
#pragma GCC diagnostic ignored "-Wformat-extra-args"
#endif
#endif

/**
 * @brief Call to SDL_sscanf
 */
#undef SDL_sscanf
int stdlib_sscanf(void *arg)
{
    int output;
    int result;
    int expected_output;
    int expected_result;
    short short_output, expected_short_output;
    long long_output, expected_long_output;
    long long long_long_output, expected_long_long_output;
    size_t size_output, expected_size_output;
    char text[128];

    expected_output = output = 123;
    expected_result = -1;
    result = SDL_sscanf("", "%i", &output);
    SDLTest_AssertPass("Call to SDL_sscanf(\"\", \"%%i\", &output)");
    SDLTest_AssertCheck(expected_output == output, "Check output, expected: %i, got: %i", expected_output, output);
    SDLTest_AssertCheck(expected_result == result, "Check return value, expected: %i, got: %i", expected_result, result);

    expected_output = output = 123;
    expected_result = 0;
    result = SDL_sscanf("a", "%i", &output);
    SDLTest_AssertPass("Call to SDL_sscanf(\"a\", \"%%i\", &output)");
    SDLTest_AssertCheck(expected_output == output, "Check output, expected: %i, got: %i", expected_output, output);
    SDLTest_AssertCheck(expected_result == result, "Check return value, expected: %i, got: %i", expected_result, result);

    output = 123;
    expected_output = 2;
    expected_result = 1;
    result = SDL_sscanf("2", "%i", &output);
    SDLTest_AssertPass("Call to SDL_sscanf(\"2\", \"%%i\", &output)");
    SDLTest_AssertCheck(expected_output == output, "Check output, expected: %i, got: %i", expected_output, output);
    SDLTest_AssertCheck(expected_result == result, "Check return value, expected: %i, got: %i", expected_result, result);

    output = 123;
    expected_output = 0xa;
    expected_result = 1;
    result = SDL_sscanf("aa", "%1x", &output);
    SDLTest_AssertPass("Call to SDL_sscanf(\"aa\", \"%%1x\", &output)");
    SDLTest_AssertCheck(expected_output == output, "Check output, expected: %i, got: %i", expected_output, output);
    SDLTest_AssertCheck(expected_result == result, "Check return value, expected: %i, got: %i", expected_result, result);

#define SIZED_TEST_CASE(type, var, format_specifier)                                                                                                                             \
    var##_output = 123;                                                                                                                                                          \
    expected_##var##_output = (type)(((unsigned type)(~0)) >> 1);                                                                                                                \
    expected_result = 1;                                                                                                                                                         \
    result = SDL_snprintf(text, sizeof(text), format_specifier, expected_##var##_output);                                                                                        \
    result = SDL_sscanf(text, format_specifier, &var##_output);                                                                                                                  \
    SDLTest_AssertPass("Call to SDL_sscanf(\"%s\", \"%s\", &output)", text, #format_specifier);                                                                                  \
    SDLTest_AssertCheck(expected_##var##_output == var##_output, "Check output, expected: " format_specifier ", got: " format_specifier, expected_##var##_output, var##_output); \
    SDLTest_AssertCheck(expected_result == result, "Check return value, expected: %i, got: %i", expected_result, result);                                                        \
                                                                                                                                                                                 \
    var##_output = 123;                                                                                                                                                          \
    expected_##var##_output = ~(type)(((unsigned type)(~0)) >> 1);                                                                                                               \
    expected_result = 1;                                                                                                                                                         \
    result = SDL_snprintf(text, sizeof(text), format_specifier, expected_##var##_output);                                                                                        \
    result = SDL_sscanf(text, format_specifier, &var##_output);                                                                                                                  \
    SDLTest_AssertPass("Call to SDL_sscanf(\"%s\", \"%s\", &output)", text, #format_specifier);                                                                                  \
    SDLTest_AssertCheck(expected_##var##_output == var##_output, "Check output, expected: " format_specifier ", got: " format_specifier, expected_##var##_output, var##_output); \
    SDLTest_AssertCheck(expected_result == result, "Check return value, expected: %i, got: %i", expected_result, result);

    SIZED_TEST_CASE(short, short, "%hd")
    SIZED_TEST_CASE(long, long, "%ld")
    SIZED_TEST_CASE(long long, long_long, "%lld")

    size_output = 123;
    expected_size_output = ~((size_t)0);
    expected_result = 1;
    result = SDL_snprintf(text, sizeof(text), "%zu", expected_size_output);
    result = SDL_sscanf(text, "%zu", &size_output);
    SDLTest_AssertPass("Call to SDL_sscanf(\"%s\", \"%%zu\", &output)", text);
    SDLTest_AssertCheck(expected_size_output == size_output, "Check output, expected: %zu, got: %zu", expected_size_output, size_output);
    SDLTest_AssertCheck(expected_result == result, "Check return value, expected: %i, got: %i", expected_result, result);

    return TEST_COMPLETED;
}

#if defined(HAVE_WFORMAT) || defined(HAVE_WFORMAT_EXTRA_ARGS)
#pragma GCC diagnostic pop
#endif

#if defined(_WIN64)
#define SIZE_FORMAT "I64u"
#elif defined(__WIN32__)
#define SIZE_FORMAT "I32u"
#else
#define SIZE_FORMAT "zu"
#endif

typedef struct
{
    size_t a;
    size_t b;
    size_t result;
    int status;
} overflow_test;

static const overflow_test multiplications[] = {
    { 1, 1, 1, 0 },
    { 0, 0, 0, 0 },
    { SDL_SIZE_MAX, 0, 0, 0 },
    { SDL_SIZE_MAX, 1, SDL_SIZE_MAX, 0 },
    { SDL_SIZE_MAX / 2, 2, SDL_SIZE_MAX - (SDL_SIZE_MAX % 2), 0 },
    { SDL_SIZE_MAX / 23, 23, SDL_SIZE_MAX - (SDL_SIZE_MAX % 23), 0 },

    { (SDL_SIZE_MAX / 2) + 1, 2, 0, -1 },
    { (SDL_SIZE_MAX / 23) + 42, 23, 0, -1 },
    { SDL_SIZE_MAX, SDL_SIZE_MAX, 0, -1 },
};

static const overflow_test additions[] = {
    { 1, 1, 2, 0 },
    { 0, 0, 0, 0 },
    { SDL_SIZE_MAX, 0, SDL_SIZE_MAX, 0 },
    { SDL_SIZE_MAX - 1, 1, SDL_SIZE_MAX, 0 },
    { SDL_SIZE_MAX - 42, 23, SDL_SIZE_MAX - (42 - 23), 0 },

    { SDL_SIZE_MAX, 1, 0, -1 },
    { SDL_SIZE_MAX, 23, 0, -1 },
    { SDL_SIZE_MAX, SDL_SIZE_MAX, 0, -1 },
};

static int
stdlib_overflow(void *arg)
{
    size_t i;
    size_t useBuiltin;

    for (useBuiltin = 0; useBuiltin < 2; useBuiltin++) {
        if (useBuiltin) {
            SDLTest_Log("Using gcc/clang builtins if possible");
        } else {
            SDLTest_Log("Not using gcc/clang builtins");
        }

        for (i = 0; i < SDL_arraysize(multiplications); i++) {
            const overflow_test *t = &multiplications[i];
            int status;
            size_t result = ~t->result;

            if (useBuiltin) {
                status = SDL_size_mul_overflow(t->a, t->b, &result);
            } else {
                /* This disables the macro that tries to use a gcc/clang
                 * builtin, so we test the fallback implementation instead. */
                status = (SDL_size_mul_overflow)(t->a, t->b, &result);
            }

            if (t->status == 0) {
                SDLTest_AssertCheck(status == 0,
                                    "(%" SIZE_FORMAT " * %" SIZE_FORMAT ") should succeed",
                                    t->a, t->b);
                SDLTest_AssertCheck(result == t->result,
                                    "(%" SIZE_FORMAT " * %" SIZE_FORMAT "): expected %" SIZE_FORMAT ", got %" SIZE_FORMAT,
                                    t->a, t->b, t->result, result);
            } else {
                SDLTest_AssertCheck(status == -1,
                                    "(%" SIZE_FORMAT " * %" SIZE_FORMAT ") should fail",
                                    t->a, t->b);
            }

            if (t->a == t->b) {
                continue;
            }

            result = ~t->result;

            if (useBuiltin) {
                status = SDL_size_mul_overflow(t->b, t->a, &result);
            } else {
                status = (SDL_size_mul_overflow)(t->b, t->a, &result);
            }

            if (t->status == 0) {
                SDLTest_AssertCheck(status == 0,
                                    "(%" SIZE_FORMAT " * %" SIZE_FORMAT ") should succeed",
                                    t->b, t->a);
                SDLTest_AssertCheck(result == t->result,
                                    "(%" SIZE_FORMAT " * %" SIZE_FORMAT "): expected %" SIZE_FORMAT ", got %" SIZE_FORMAT,
                                    t->b, t->a, t->result, result);
            } else {
                SDLTest_AssertCheck(status == -1,
                                    "(%" SIZE_FORMAT " * %" SIZE_FORMAT ") should fail",
                                    t->b, t->a);
            }
        }

        for (i = 0; i < SDL_arraysize(additions); i++) {
            const overflow_test *t = &additions[i];
            int status;
            size_t result = ~t->result;

            if (useBuiltin) {
                status = SDL_size_add_overflow(t->a, t->b, &result);
            } else {
                status = (SDL_size_add_overflow)(t->a, t->b, &result);
            }

            if (t->status == 0) {
                SDLTest_AssertCheck(status == 0,
                                    "(%" SIZE_FORMAT " + %" SIZE_FORMAT ") should succeed",
                                    t->a, t->b);
                SDLTest_AssertCheck(result == t->result,
                                    "(%" SIZE_FORMAT " + %" SIZE_FORMAT "): expected %" SIZE_FORMAT ", got %" SIZE_FORMAT,
                                    t->a, t->b, t->result, result);
            } else {
                SDLTest_AssertCheck(status == -1,
                                    "(%" SIZE_FORMAT " + %" SIZE_FORMAT ") should fail",
                                    t->a, t->b);
            }

            if (t->a == t->b) {
                continue;
            }

            result = ~t->result;

            if (useBuiltin) {
                status = SDL_size_add_overflow(t->b, t->a, &result);
            } else {
                status = (SDL_size_add_overflow)(t->b, t->a, &result);
            }

            if (t->status == 0) {
                SDLTest_AssertCheck(status == 0,
                                    "(%" SIZE_FORMAT " + %" SIZE_FORMAT ") should succeed",
                                    t->b, t->a);
                SDLTest_AssertCheck(result == t->result,
                                    "(%" SIZE_FORMAT " + %" SIZE_FORMAT "): expected %" SIZE_FORMAT ", got %" SIZE_FORMAT,
                                    t->b, t->a, t->result, result);
            } else {
                SDLTest_AssertCheck(status == -1,
                                    "(%" SIZE_FORMAT " + %" SIZE_FORMAT ") should fail",
                                    t->b, t->a);
            }
        }
    }

    return TEST_COMPLETED;
}

/* ================= Test References ================== */

/* Standard C routine test cases */
static const SDLTest_TestCaseReference stdlibTest1 = {
    (SDLTest_TestCaseFp)stdlib_strlcpy, "stdlib_strlcpy", "Call to SDL_strlcpy", TEST_ENABLED
};

static const SDLTest_TestCaseReference stdlibTest2 = {
    (SDLTest_TestCaseFp)stdlib_snprintf, "stdlib_snprintf", "Call to SDL_snprintf", TEST_ENABLED
};

static const SDLTest_TestCaseReference stdlibTest3 = {
    (SDLTest_TestCaseFp)stdlib_getsetenv, "stdlib_getsetenv", "Call to SDL_getenv and SDL_setenv", TEST_ENABLED
};

static const SDLTest_TestCaseReference stdlibTest4 = {
    (SDLTest_TestCaseFp)stdlib_sscanf, "stdlib_sscanf", "Call to SDL_sscanf", TEST_ENABLED
};

static const SDLTest_TestCaseReference stdlibTestOverflow = {
    stdlib_overflow, "stdlib_overflow", "Overflow detection", TEST_ENABLED
};

/* Sequence of Standard C routine test cases */
static const SDLTest_TestCaseReference *stdlibTests[] = {
    &stdlibTest1,
    &stdlibTest2,
    &stdlibTest3,
    &stdlibTest4,
    &stdlibTestOverflow,
    NULL
};

/* Standard C routine test suite (global) */
SDLTest_TestSuiteReference stdlibTestSuite = {
    "Stdlib",
    NULL,
    stdlibTests,
    NULL
};