diff --git a/tests/acutest.h b/tests/acutest.h
new file mode 100644
index 0000000..1d13044
--- /dev/null
+++ b/tests/acutest.h
@@ -0,0 +1,1794 @@
+/*
+ * Acutest -- Another C/C++ Unit Test facility
+ * <https://github.com/mity/acutest>
+ *
+ * Copyright 2013-2020 Martin Mitas
+ * Copyright 2019 Garrett D'Amore
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#ifndef ACUTEST_H
+#define ACUTEST_H
+
+
+/************************
+ *** Public interface ***
+ ************************/
+
+/* By default, "acutest.h" provides the main program entry point (function
+ * main()). However, if the test suite is composed of multiple source files
+ * which include "acutest.h", then this causes a problem of multiple main()
+ * definitions. To avoid this problem, #define macro TEST_NO_MAIN in all
+ * compilation units but one.
+ */
+
+/* Macro to specify list of unit tests in the suite.
+ * The unit test implementation MUST provide list of unit tests it implements
+ * with this macro:
+ *
+ *   TEST_LIST = {
+ *       { "test1_name", test1_func_ptr },
+ *       { "test2_name", test2_func_ptr },
+ *       ...
+ *       { NULL, NULL }     // zeroed record marking the end of the list
+ *   };
+ *
+ * The list specifies names of each test (must be unique) and pointer to
+ * a function implementing it. The function does not take any arguments
+ * and has no return values, i.e. every test function has to be compatible
+ * with this prototype:
+ *
+ *   void test_func(void);
+ *
+ * Note the list has to be ended with a zeroed record.
+ */
+#define TEST_LIST               const struct acutest_test_ acutest_list_[]
+
+
+/* Macros for testing whether an unit test succeeds or fails. These macros
+ * can be used arbitrarily in functions implementing the unit tests.
+ *
+ * If any condition fails throughout execution of a test, the test fails.
+ *
+ * TEST_CHECK takes only one argument (the condition), TEST_CHECK_ allows
+ * also to specify an error message to print out if the condition fails.
+ * (It expects printf-like format string and its parameters). The macros
+ * return non-zero (condition passes) or 0 (condition fails).
+ *
+ * That can be useful when more conditions should be checked only if some
+ * preceding condition passes, as illustrated in this code snippet:
+ *
+ *   SomeStruct* ptr = allocate_some_struct();
+ *   if(TEST_CHECK(ptr != NULL)) {
+ *       TEST_CHECK(ptr->member1 < 100);
+ *       TEST_CHECK(ptr->member2 > 200);
+ *   }
+ */
+#define TEST_CHECK_(cond,...)   acutest_check_((cond), __FILE__, __LINE__, __VA_ARGS__)
+#define TEST_CHECK(cond)        acutest_check_((cond), __FILE__, __LINE__, "%s", #cond)
+
+
+/* These macros are the same as TEST_CHECK_ and TEST_CHECK except that if the
+ * condition fails, the currently executed unit test is immediately aborted.
+ *
+ * That is done either by calling abort() if the unit test is executed as a
+ * child process; or via longjmp() if the unit test is executed within the
+ * main Acutest process.
+ *
+ * As a side effect of such abortion, your unit tests may cause memory leaks,
+ * unflushed file descriptors, and other phenomena caused by the abortion.
+ *
+ * Therefore you should not use these as a general replacement for TEST_CHECK.
+ * Use it with some caution, especially if your test causes some other side
+ * effects to the outside world (e.g. communicating with some server, inserting
+ * into a database etc.).
+ */
+#define TEST_ASSERT_(cond,...)                                                 \
+    do {                                                                       \
+        if(!acutest_check_((cond), __FILE__, __LINE__, __VA_ARGS__))           \
+            acutest_abort_();                                                  \
+    } while(0)
+#define TEST_ASSERT(cond)                                                      \
+    do {                                                                       \
+        if(!acutest_check_((cond), __FILE__, __LINE__, "%s", #cond))           \
+            acutest_abort_();                                                  \
+    } while(0)
+
+
+#ifdef __cplusplus
+/* Macros to verify that the code (the 1st argument) throws exception of given
+ * type (the 2nd argument). (Note these macros are only available in C++.)
+ *
+ * TEST_EXCEPTION_ is like TEST_EXCEPTION but accepts custom printf-like
+ * message.
+ *
+ * For example:
+ *
+ *   TEST_EXCEPTION(function_that_throw(), ExpectedExceptionType);
+ *
+ * If the function_that_throw() throws ExpectedExceptionType, the check passes.
+ * If the function throws anything incompatible with ExpectedExceptionType
+ * (or if it does not thrown an exception at all), the check fails.
+ */
+#define TEST_EXCEPTION(code, exctype)                                          \
+    do {                                                                       \
+        bool exc_ok_ = false;                                                  \
+        const char *msg_ = NULL;                                               \
+        try {                                                                  \
+            code;                                                              \
+            msg_ = "No exception thrown.";                                     \
+        } catch(exctype const&) {                                              \
+            exc_ok_= true;                                                     \
+        } catch(...) {                                                         \
+            msg_ = "Unexpected exception thrown.";                             \
+        }                                                                      \
+        acutest_check_(exc_ok_, __FILE__, __LINE__, #code " throws " #exctype);\
+        if(msg_ != NULL)                                                       \
+            acutest_message_("%s", msg_);                                      \
+    } while(0)
+#define TEST_EXCEPTION_(code, exctype, ...)                                    \
+    do {                                                                       \
+        bool exc_ok_ = false;                                                  \
+        const char *msg_ = NULL;                                               \
+        try {                                                                  \
+            code;                                                              \
+            msg_ = "No exception thrown.";                                     \
+        } catch(exctype const&) {                                              \
+            exc_ok_= true;                                                     \
+        } catch(...) {                                                         \
+            msg_ = "Unexpected exception thrown.";                             \
+        }                                                                      \
+        acutest_check_(exc_ok_, __FILE__, __LINE__, __VA_ARGS__);              \
+        if(msg_ != NULL)                                                       \
+            acutest_message_("%s", msg_);                                      \
+    } while(0)
+#endif  /* #ifdef __cplusplus */
+
+
+/* Sometimes it is useful to split execution of more complex unit tests to some
+ * smaller parts and associate those parts with some names.
+ *
+ * This is especially handy if the given unit test is implemented as a loop
+ * over some vector of multiple testing inputs. Using these macros allow to use
+ * sort of subtitle for each iteration of the loop (e.g. outputting the input
+ * itself or a name associated to it), so that if any TEST_CHECK condition
+ * fails in the loop, it can be easily seen which iteration triggers the
+ * failure, without the need to manually output the iteration-specific data in
+ * every single TEST_CHECK inside the loop body.
+ *
+ * TEST_CASE allows to specify only single string as the name of the case,
+ * TEST_CASE_ provides all the power of printf-like string formatting.
+ *
+ * Note that the test cases cannot be nested. Starting a new test case ends
+ * implicitly the previous one. To end the test case explicitly (e.g. to end
+ * the last test case after exiting the loop), you may use TEST_CASE(NULL).
+ */
+#define TEST_CASE_(...)         acutest_case_(__VA_ARGS__)
+#define TEST_CASE(name)         acutest_case_("%s", name)
+
+
+/* Maximal output per TEST_CASE call. Longer messages are cut.
+ * You may define another limit prior including "acutest.h"
+ */
+#ifndef TEST_CASE_MAXSIZE
+    #define TEST_CASE_MAXSIZE    64
+#endif
+
+
+/* printf-like macro for outputting an extra information about a failure.
+ *
+ * Intended use is to output some computed output versus the expected value,
+ * e.g. like this:
+ *
+ *   if(!TEST_CHECK(produced == expected)) {
+ *       TEST_MSG("Expected: %d", expected);
+ *       TEST_MSG("Produced: %d", produced);
+ *   }
+ *
+ * Note the message is only written down if the most recent use of any checking
+ * macro (like e.g. TEST_CHECK or TEST_EXCEPTION) in the current test failed.
+ * This means the above is equivalent to just this:
+ *
+ *   TEST_CHECK(produced == expected);
+ *   TEST_MSG("Expected: %d", expected);
+ *   TEST_MSG("Produced: %d", produced);
+ *
+ * The macro can deal with multi-line output fairly well. It also automatically
+ * adds a final new-line if there is none present.
+ */
+#define TEST_MSG(...)           acutest_message_(__VA_ARGS__)
+
+
+/* Maximal output per TEST_MSG call. Longer messages are cut.
+ * You may define another limit prior including "acutest.h"
+ */
+#ifndef TEST_MSG_MAXSIZE
+    #define TEST_MSG_MAXSIZE    1024
+#endif
+
+
+/* Macro for dumping a block of memory.
+ *
+ * Its intended use is very similar to what TEST_MSG is for, but instead of
+ * generating any printf-like message, this is for dumping raw block of a
+ * memory in a hexadecimal form:
+ *
+ *   TEST_CHECK(size_produced == size_expected &&
+ *              memcmp(addr_produced, addr_expected, size_produced) == 0);
+ *   TEST_DUMP("Expected:", addr_expected, size_expected);
+ *   TEST_DUMP("Produced:", addr_produced, size_produced);
+ */
+#define TEST_DUMP(title, addr, size)    acutest_dump_(title, addr, size)
+
+/* Maximal output per TEST_DUMP call (in bytes to dump). Longer blocks are cut.
+ * You may define another limit prior including "acutest.h"
+ */
+#ifndef TEST_DUMP_MAXSIZE
+    #define TEST_DUMP_MAXSIZE   1024
+#endif
+
+
+/* Common test initialiation/clean-up
+ *
+ * In some test suites, it may be needed to perform some sort of the same
+ * initialization and/or clean-up in all the tests.
+ *
+ * Such test suites may use macros TEST_INIT and/or TEST_FINI prior including
+ * this header. The expansion of the macro is then used as a body of helper
+ * function called just before executing every single (TEST_INIT) or just after
+ * it ends (TEST_FINI).
+ *
+ * Examples of various ways how to use the macro TEST_INIT:
+ *
+ *   #define TEST_INIT      my_init_func();
+ *   #define TEST_INIT      my_init_func()      // Works even without the semicolon
+ *   #define TEST_INIT      setlocale(LC_ALL, NULL);
+ *   #define TEST_INIT      { setlocale(LC_ALL, NULL); my_init_func(); }
+ *
+ * TEST_FINI is to be used in the same way.
+ */
+
+
+/**********************
+ *** Implementation ***
+ **********************/
+
+/* The unit test files should not rely on anything below. */
+
+#include <ctype.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <setjmp.h>
+
+#if defined(unix) || defined(__unix__) || defined(__unix) || defined(__APPLE__)
+    #define ACUTEST_UNIX_       1
+    #include <errno.h>
+    #include <libgen.h>
+    #include <unistd.h>
+    #include <sys/types.h>
+    #include <sys/wait.h>
+    #include <signal.h>
+    #include <time.h>
+
+    #if defined CLOCK_PROCESS_CPUTIME_ID  &&  defined CLOCK_MONOTONIC
+        #define ACUTEST_HAS_POSIX_TIMER_    1
+    #endif
+#endif
+
+#if defined(_gnu_linux_) || defined(__linux__)
+    #define ACUTEST_LINUX_      1
+    #include <fcntl.h>
+    #include <sys/stat.h>
+#endif
+
+#if defined(_WIN32) || defined(__WIN32__) || defined(__WINDOWS__)
+    #define ACUTEST_WIN_        1
+    #include <windows.h>
+    #include <io.h>
+#endif
+
+#ifdef __cplusplus
+    #include <exception>
+#endif
+
+#ifdef __has_include
+    #if __has_include(<valgrind.h>)
+        #include <valgrind.h>
+    #endif
+#endif
+
+/* Enable the use of the non-standard keyword __attribute__ to silence warnings under some compilers */
+#if defined(__GNUC__) || defined(__clang__)
+    #define ACUTEST_ATTRIBUTE_(attr)    __attribute__((attr))
+#else
+    #define ACUTEST_ATTRIBUTE_(attr)
+#endif
+
+/* Note our global private identifiers end with '_' to mitigate risk of clash
+ * with the unit tests implementation. */
+
+#ifdef __cplusplus
+    extern "C" {
+#endif
+
+#ifdef _MSC_VER
+    /* In the multi-platform code like ours, we cannot use the non-standard
+     * "safe" functions from Microsoft C lib like e.g. sprintf_s() instead of
+     * standard sprintf(). Hence, lets disable the warning C4996. */
+    #pragma warning(push)
+    #pragma warning(disable: 4996)
+#endif
+
+
+struct acutest_test_ {
+    const char* name;
+    void (*func)(void);
+};
+
+struct acutest_test_data_ {
+    unsigned char flags;
+    double duration;
+};
+
+enum {
+    ACUTEST_FLAG_RUN_ = 1 << 0,
+    ACUTEST_FLAG_SUCCESS_ = 1 << 1,
+    ACUTEST_FLAG_FAILURE_ = 1 << 2,
+};
+
+extern const struct acutest_test_ acutest_list_[];
+
+int acutest_check_(int cond, const char* file, int line, const char* fmt, ...);
+void acutest_case_(const char* fmt, ...);
+void acutest_message_(const char* fmt, ...);
+void acutest_dump_(const char* title, const void* addr, size_t size);
+void acutest_abort_(void) ACUTEST_ATTRIBUTE_(noreturn);
+
+
+#ifndef TEST_NO_MAIN
+
+static char* acutest_argv0_ = NULL;
+static size_t acutest_list_size_ = 0;
+static struct acutest_test_data_* acutest_test_data_ = NULL;
+static size_t acutest_count_ = 0;
+static int acutest_no_exec_ = -1;
+static int acutest_no_summary_ = 0;
+static int acutest_tap_ = 0;
+static int acutest_skip_mode_ = 0;
+static int acutest_worker_ = 0;
+static int acutest_worker_index_ = 0;
+static int acutest_cond_failed_ = 0;
+static int acutest_was_aborted_ = 0;
+static FILE *acutest_xml_output_ = NULL;
+
+static int acutest_stat_failed_units_ = 0;
+static int acutest_stat_run_units_ = 0;
+
+static const struct acutest_test_* acutest_current_test_ = NULL;
+static int acutest_current_index_ = 0;
+static char acutest_case_name_[TEST_CASE_MAXSIZE] = "";
+static int acutest_test_already_logged_ = 0;
+static int acutest_case_already_logged_ = 0;
+static int acutest_verbose_level_ = 2;
+static int acutest_test_failures_ = 0;
+static int acutest_colorize_ = 0;
+static int acutest_timer_ = 0;
+
+static int acutest_abort_has_jmp_buf_ = 0;
+static jmp_buf acutest_abort_jmp_buf_;
+
+
+static void
+acutest_cleanup_(void)
+{
+    free((void*) acutest_test_data_);
+}
+
+static void ACUTEST_ATTRIBUTE_(noreturn)
+acutest_exit_(int exit_code)
+{
+    acutest_cleanup_();
+    exit(exit_code);
+}
+
+#if defined ACUTEST_WIN_
+    typedef LARGE_INTEGER acutest_timer_type_;
+    static LARGE_INTEGER acutest_timer_freq_;
+    static acutest_timer_type_ acutest_timer_start_;
+    static acutest_timer_type_ acutest_timer_end_;
+
+    static void
+    acutest_timer_init_(void)
+    {
+        QueryPerformanceFrequency(&acutest_timer_freq_);
+    }
+
+    static void
+    acutest_timer_get_time_(LARGE_INTEGER* ts)
+    {
+        QueryPerformanceCounter(ts);
+    }
+
+    static double
+    acutest_timer_diff_(LARGE_INTEGER start, LARGE_INTEGER end)
+    {
+        double duration = (double)(end.QuadPart - start.QuadPart);
+        duration /= (double)acutest_timer_freq_.QuadPart;
+        return duration;
+    }
+
+    static void
+    acutest_timer_print_diff_(void)
+    {
+        printf("%.6lf secs", acutest_timer_diff_(acutest_timer_start_, acutest_timer_end_));
+    }
+#elif defined ACUTEST_HAS_POSIX_TIMER_
+    static clockid_t acutest_timer_id_;
+    typedef struct timespec acutest_timer_type_;
+    static acutest_timer_type_ acutest_timer_start_;
+    static acutest_timer_type_ acutest_timer_end_;
+
+    static void
+    acutest_timer_init_(void)
+    {
+        if(acutest_timer_ == 1)
+            acutest_timer_id_ = CLOCK_MONOTONIC;
+        else if(acutest_timer_ == 2)
+            acutest_timer_id_ = CLOCK_PROCESS_CPUTIME_ID;
+    }
+
+    static void
+    acutest_timer_get_time_(struct timespec* ts)
+    {
+        clock_gettime(acutest_timer_id_, ts);
+    }
+
+    static double
+    acutest_timer_diff_(struct timespec start, struct timespec end)
+    {
+        double endns;
+        double startns;
+
+        endns = end.tv_sec;
+        endns *= 1e9;
+        endns += end.tv_nsec;
+
+        startns = start.tv_sec;
+        startns *= 1e9;
+        startns += start.tv_nsec;
+
+        return ((endns - startns)/ 1e9);
+    }
+
+    static void
+    acutest_timer_print_diff_(void)
+    {
+        printf("%.6lf secs",
+            acutest_timer_diff_(acutest_timer_start_, acutest_timer_end_));
+    }
+#else
+    typedef int acutest_timer_type_;
+    static acutest_timer_type_ acutest_timer_start_;
+    static acutest_timer_type_ acutest_timer_end_;
+
+    void
+    acutest_timer_init_(void)
+    {}
+
+    static void
+    acutest_timer_get_time_(int* ts)
+    {
+        (void) ts;
+    }
+
+    static double
+    acutest_timer_diff_(int start, int end)
+    {
+        (void) start;
+        (void) end;
+        return 0.0;
+    }
+
+    static void
+    acutest_timer_print_diff_(void)
+    {}
+#endif
+
+#define ACUTEST_COLOR_DEFAULT_              0
+#define ACUTEST_COLOR_GREEN_                1
+#define ACUTEST_COLOR_RED_                  2
+#define ACUTEST_COLOR_DEFAULT_INTENSIVE_    3
+#define ACUTEST_COLOR_GREEN_INTENSIVE_      4
+#define ACUTEST_COLOR_RED_INTENSIVE_        5
+
+static int ACUTEST_ATTRIBUTE_(format (printf, 2, 3))
+acutest_colored_printf_(int color, const char* fmt, ...)
+{
+    va_list args;
+    char buffer[256];
+    int n;
+
+    va_start(args, fmt);
+    vsnprintf(buffer, sizeof(buffer), fmt, args);
+    va_end(args);
+    buffer[sizeof(buffer)-1] = '\0';
+
+    if(!acutest_colorize_) {
+        return printf("%s", buffer);
+    }
+
+#if defined ACUTEST_UNIX_
+    {
+        const char* col_str;
+        switch(color) {
+            case ACUTEST_COLOR_GREEN_:              col_str = "\033[0;32m"; break;
+            case ACUTEST_COLOR_RED_:                col_str = "\033[0;31m"; break;
+            case ACUTEST_COLOR_GREEN_INTENSIVE_:    col_str = "\033[1;32m"; break;
+            case ACUTEST_COLOR_RED_INTENSIVE_:      col_str = "\033[1;31m"; break;
+            case ACUTEST_COLOR_DEFAULT_INTENSIVE_:  col_str = "\033[1m"; break;
+            default:                                col_str = "\033[0m"; break;
+        }
+        printf("%s", col_str);
+        n = printf("%s", buffer);
+        printf("\033[0m");
+        return n;
+    }
+#elif defined ACUTEST_WIN_
+    {
+        HANDLE h;
+        CONSOLE_SCREEN_BUFFER_INFO info;
+        WORD attr;
+
+        h = GetStdHandle(STD_OUTPUT_HANDLE);
+        GetConsoleScreenBufferInfo(h, &info);
+
+        switch(color) {
+            case ACUTEST_COLOR_GREEN_:              attr = FOREGROUND_GREEN; break;
+            case ACUTEST_COLOR_RED_:                attr = FOREGROUND_RED; break;
+            case ACUTEST_COLOR_GREEN_INTENSIVE_:    attr = FOREGROUND_GREEN | FOREGROUND_INTENSITY; break;
+            case ACUTEST_COLOR_RED_INTENSIVE_:      attr = FOREGROUND_RED | FOREGROUND_INTENSITY; break;
+            case ACUTEST_COLOR_DEFAULT_INTENSIVE_:  attr = FOREGROUND_BLUE | FOREGROUND_GREEN | FOREGROUND_RED | FOREGROUND_INTENSITY; break;
+            default:                                attr = 0; break;
+        }
+        if(attr != 0)
+            SetConsoleTextAttribute(h, attr);
+        n = printf("%s", buffer);
+        SetConsoleTextAttribute(h, info.wAttributes);
+        return n;
+    }
+#else
+    n = printf("%s", buffer);
+    return n;
+#endif
+}
+
+static void
+acutest_begin_test_line_(const struct acutest_test_* test)
+{
+    if(!acutest_tap_) {
+        if(acutest_verbose_level_ >= 3) {
+            acutest_colored_printf_(ACUTEST_COLOR_DEFAULT_INTENSIVE_, "Test %s:\n", test->name);
+            acutest_test_already_logged_++;
+        } else if(acutest_verbose_level_ >= 1) {
+            int n;
+            char spaces[48];
+
+            n = acutest_colored_printf_(ACUTEST_COLOR_DEFAULT_INTENSIVE_, "Test %s... ", test->name);
+            memset(spaces, ' ', sizeof(spaces));
+            if(n < (int) sizeof(spaces))
+                printf("%.*s", (int) sizeof(spaces) - n, spaces);
+        } else {
+            acutest_test_already_logged_ = 1;
+        }
+    }
+}
+
+static void
+acutest_finish_test_line_(int result)
+{
+    if(acutest_tap_) {
+        const char* str = (result == 0) ? "ok" : "not ok";
+
+        printf("%s %d - %s\n", str, acutest_current_index_ + 1, acutest_current_test_->name);
+
+        if(result == 0  &&  acutest_timer_) {
+            printf("# Duration: ");
+            acutest_timer_print_diff_();
+            printf("\n");
+        }
+    } else {
+        int color = (result == 0) ? ACUTEST_COLOR_GREEN_INTENSIVE_ : ACUTEST_COLOR_RED_INTENSIVE_;
+        const char* str = (result == 0) ? "OK" : "FAILED";
+        printf("[ ");
+        acutest_colored_printf_(color, "%s", str);
+        printf(" ]");
+
+        if(result == 0  &&  acutest_timer_) {
+            printf("  ");
+            acutest_timer_print_diff_();
+        }
+
+        printf("\n");
+    }
+}
+
+static void
+acutest_line_indent_(int level)
+{
+    static const char spaces[] = "                ";
+    int n = level * 2;
+
+    if(acutest_tap_  &&  n > 0) {
+        n--;
+        printf("#");
+    }
+
+    while(n > 16) {
+        printf("%s", spaces);
+        n -= 16;
+    }
+    printf("%.*s", n, spaces);
+}
+
+int ACUTEST_ATTRIBUTE_(format (printf, 4, 5))
+acutest_check_(int cond, const char* file, int line, const char* fmt, ...)
+{
+    const char *result_str;
+    int result_color;
+    int verbose_level;
+
+    if(cond) {
+        result_str = "ok";
+        result_color = ACUTEST_COLOR_GREEN_;
+        verbose_level = 3;
+    } else {
+        if(!acutest_test_already_logged_  &&  acutest_current_test_ != NULL)
+            acutest_finish_test_line_(-1);
+
+        result_str = "failed";
+        result_color = ACUTEST_COLOR_RED_;
+        verbose_level = 2;
+        acutest_test_failures_++;
+        acutest_test_already_logged_++;
+    }
+
+    if(acutest_verbose_level_ >= verbose_level) {
+        va_list args;
+
+        if(!acutest_case_already_logged_  &&  acutest_case_name_[0]) {
+            acutest_line_indent_(1);
+            acutest_colored_printf_(ACUTEST_COLOR_DEFAULT_INTENSIVE_, "Case %s:\n", acutest_case_name_);
+            acutest_test_already_logged_++;
+            acutest_case_already_logged_++;
+        }
+
+        acutest_line_indent_(acutest_case_name_[0] ? 2 : 1);
+        if(file != NULL) {
+#ifdef ACUTEST_WIN_
+            const char* lastsep1 = strrchr(file, '\\');
+            const char* lastsep2 = strrchr(file, '/');
+            if(lastsep1 == NULL)
+                lastsep1 = file-1;
+            if(lastsep2 == NULL)
+                lastsep2 = file-1;
+            file = (lastsep1 > lastsep2 ? lastsep1 : lastsep2) + 1;
+#else
+            const char* lastsep = strrchr(file, '/');
+            if(lastsep != NULL)
+                file = lastsep+1;
+#endif
+            printf("%s:%d: Check ", file, line);
+        }
+
+        va_start(args, fmt);
+        vprintf(fmt, args);
+        va_end(args);
+
+        printf("... ");
+        acutest_colored_printf_(result_color, "%s", result_str);
+        printf("\n");
+        acutest_test_already_logged_++;
+    }
+
+    acutest_cond_failed_ = (cond == 0);
+    return !acutest_cond_failed_;
+}
+
+void ACUTEST_ATTRIBUTE_(format (printf, 1, 2))
+acutest_case_(const char* fmt, ...)
+{
+    va_list args;
+
+    if(acutest_verbose_level_ < 2)
+        return;
+
+    if(acutest_case_name_[0]) {
+        acutest_case_already_logged_ = 0;
+        acutest_case_name_[0] = '\0';
+    }
+
+    if(fmt == NULL)
+        return;
+
+    va_start(args, fmt);
+    vsnprintf(acutest_case_name_, sizeof(acutest_case_name_) - 1, fmt, args);
+    va_end(args);
+    acutest_case_name_[sizeof(acutest_case_name_) - 1] = '\0';
+
+    if(acutest_verbose_level_ >= 3) {
+        acutest_line_indent_(1);
+        acutest_colored_printf_(ACUTEST_COLOR_DEFAULT_INTENSIVE_, "Case %s:\n", acutest_case_name_);
+        acutest_test_already_logged_++;
+        acutest_case_already_logged_++;
+    }
+}
+
+void ACUTEST_ATTRIBUTE_(format (printf, 1, 2))
+acutest_message_(const char* fmt, ...)
+{
+    char buffer[TEST_MSG_MAXSIZE];
+    char* line_beg;
+    char* line_end;
+    va_list args;
+
+    if(acutest_verbose_level_ < 2)
+        return;
+
+    /* We allow extra message only when something is already wrong in the
+     * current test. */
+    if(acutest_current_test_ == NULL  ||  !acutest_cond_failed_)
+        return;
+
+    va_start(args, fmt);
+    vsnprintf(buffer, TEST_MSG_MAXSIZE, fmt, args);
+    va_end(args);
+    buffer[TEST_MSG_MAXSIZE-1] = '\0';
+
+    line_beg = buffer;
+    while(1) {
+        line_end = strchr(line_beg, '\n');
+        if(line_end == NULL)
+            break;
+        acutest_line_indent_(acutest_case_name_[0] ? 3 : 2);
+        printf("%.*s\n", (int)(line_end - line_beg), line_beg);
+        line_beg = line_end + 1;
+    }
+    if(line_beg[0] != '\0') {
+        acutest_line_indent_(acutest_case_name_[0] ? 3 : 2);
+        printf("%s\n", line_beg);
+    }
+}
+
+void
+acutest_dump_(const char* title, const void* addr, size_t size)
+{
+    static const size_t BYTES_PER_LINE = 16;
+    size_t line_beg;
+    size_t truncate = 0;
+
+    if(acutest_verbose_level_ < 2)
+        return;
+
+    /* We allow extra message only when something is already wrong in the
+     * current test. */
+    if(acutest_current_test_ == NULL  ||  !acutest_cond_failed_)
+        return;
+
+    if(size > TEST_DUMP_MAXSIZE) {
+        truncate = size - TEST_DUMP_MAXSIZE;
+        size = TEST_DUMP_MAXSIZE;
+    }
+
+    acutest_line_indent_(acutest_case_name_[0] ? 3 : 2);
+    printf((title[strlen(title)-1] == ':') ? "%s\n" : "%s:\n", title);
+
+    for(line_beg = 0; line_beg < size; line_beg += BYTES_PER_LINE) {
+        size_t line_end = line_beg + BYTES_PER_LINE;
+        size_t off;
+
+        acutest_line_indent_(acutest_case_name_[0] ? 4 : 3);
+        printf("%08lx: ", (unsigned long)line_beg);
+        for(off = line_beg; off < line_end; off++) {
+            if(off < size)
+                printf(" %02x", ((const unsigned char*)addr)[off]);
+            else
+                printf("   ");
+        }
+
+        printf("  ");
+        for(off = line_beg; off < line_end; off++) {
+            unsigned char byte = ((const unsigned char*)addr)[off];
+            if(off < size)
+                printf("%c", (iscntrl(byte) ? '.' : byte));
+            else
+                break;
+        }
+
+        printf("\n");
+    }
+
+    if(truncate > 0) {
+        acutest_line_indent_(acutest_case_name_[0] ? 4 : 3);
+        printf("           ... (and more %u bytes)\n", (unsigned) truncate);
+    }
+}
+
+/* This is called just before each test */
+static void
+acutest_init_(const char *test_name)
+{
+#ifdef TEST_INIT
+    TEST_INIT
+    ; /* Allow for a single unterminated function call */
+#endif
+
+    /* Suppress any warnings about unused variable. */
+    (void) test_name;
+}
+
+/* This is called after each test */
+static void
+acutest_fini_(const char *test_name)
+{
+#ifdef TEST_FINI
+    TEST_FINI
+    ; /* Allow for a single unterminated function call */
+#endif
+
+    /* Suppress any warnings about unused variable. */
+    (void) test_name;
+}
+
+void
+acutest_abort_(void)
+{
+    if(acutest_abort_has_jmp_buf_) {
+        longjmp(acutest_abort_jmp_buf_, 1);
+    } else {
+        if(acutest_current_test_ != NULL)
+            acutest_fini_(acutest_current_test_->name);
+        abort();
+    }
+}
+
+static void
+acutest_list_names_(void)
+{
+    const struct acutest_test_* test;
+
+    printf("Unit tests:\n");
+    for(test = &acutest_list_[0]; test->func != NULL; test++)
+        printf("  %s\n", test->name);
+}
+
+static void
+acutest_remember_(int i)
+{
+    if(acutest_test_data_[i].flags & ACUTEST_FLAG_RUN_)
+        return;
+
+    acutest_test_data_[i].flags |= ACUTEST_FLAG_RUN_;
+    acutest_count_++;
+}
+
+static void
+acutest_set_success_(int i, int success)
+{
+    acutest_test_data_[i].flags |= success ? ACUTEST_FLAG_SUCCESS_ : ACUTEST_FLAG_FAILURE_;
+}
+
+static void
+acutest_set_duration_(int i, double duration)
+{
+    acutest_test_data_[i].duration = duration;
+}
+
+static int
+acutest_name_contains_word_(const char* name, const char* pattern)
+{
+    static const char word_delim[] = " \t-_/.,:;";
+    const char* substr;
+    size_t pattern_len;
+
+    pattern_len = strlen(pattern);
+
+    substr = strstr(name, pattern);
+    while(substr != NULL) {
+        int starts_on_word_boundary = (substr == name || strchr(word_delim, substr[-1]) != NULL);
+        int ends_on_word_boundary = (substr[pattern_len] == '\0' || strchr(word_delim, substr[pattern_len]) != NULL);
+
+        if(starts_on_word_boundary && ends_on_word_boundary)
+            return 1;
+
+        substr = strstr(substr+1, pattern);
+    }
+
+    return 0;
+}
+
+static int
+acutest_lookup_(const char* pattern)
+{
+    int i;
+    int n = 0;
+
+    /* Try exact match. */
+    for(i = 0; i < (int) acutest_list_size_; i++) {
+        if(strcmp(acutest_list_[i].name, pattern) == 0) {
+            acutest_remember_(i);
+            n++;
+            break;
+        }
+    }
+    if(n > 0)
+        return n;
+
+    /* Try word match. */
+    for(i = 0; i < (int) acutest_list_size_; i++) {
+        if(acutest_name_contains_word_(acutest_list_[i].name, pattern)) {
+            acutest_remember_(i);
+            n++;
+        }
+    }
+    if(n > 0)
+        return n;
+
+    /* Try relaxed match. */
+    for(i = 0; i < (int) acutest_list_size_; i++) {
+        if(strstr(acutest_list_[i].name, pattern) != NULL) {
+            acutest_remember_(i);
+            n++;
+        }
+    }
+
+    return n;
+}
+
+
+/* Called if anything goes bad in Acutest, or if the unit test ends in other
+ * way then by normal returning from its function (e.g. exception or some
+ * abnormal child process termination). */
+static void ACUTEST_ATTRIBUTE_(format (printf, 1, 2))
+acutest_error_(const char* fmt, ...)
+{
+    if(acutest_verbose_level_ == 0)
+        return;
+
+    if(acutest_verbose_level_ >= 2) {
+        va_list args;
+
+        acutest_line_indent_(1);
+        if(acutest_verbose_level_ >= 3)
+            acutest_colored_printf_(ACUTEST_COLOR_RED_INTENSIVE_, "ERROR: ");
+        va_start(args, fmt);
+        vprintf(fmt, args);
+        va_end(args);
+        printf("\n");
+    }
+
+    if(acutest_verbose_level_ >= 3) {
+        printf("\n");
+    }
+}
+
+/* Call directly the given test unit function. */
+static int
+acutest_do_run_(const struct acutest_test_* test, int index)
+{
+    int status = -1;
+
+    acutest_was_aborted_ = 0;
+    acutest_current_test_ = test;
+    acutest_current_index_ = index;
+    acutest_test_failures_ = 0;
+    acutest_test_already_logged_ = 0;
+    acutest_cond_failed_ = 0;
+
+#ifdef __cplusplus
+    try {
+#endif
+        acutest_init_(test->name);
+        acutest_begin_test_line_(test);
+
+        /* This is good to do in case the test unit crashes. */
+        fflush(stdout);
+        fflush(stderr);
+
+        if(!acutest_worker_) {
+            acutest_abort_has_jmp_buf_ = 1;
+            if(setjmp(acutest_abort_jmp_buf_) != 0) {
+                acutest_was_aborted_ = 1;
+                goto aborted;
+            }
+        }
+
+        acutest_timer_get_time_(&acutest_timer_start_);
+        test->func();
+aborted:
+        acutest_abort_has_jmp_buf_ = 0;
+        acutest_timer_get_time_(&acutest_timer_end_);
+
+        if(acutest_verbose_level_ >= 3) {
+            acutest_line_indent_(1);
+            if(acutest_test_failures_ == 0) {
+                acutest_colored_printf_(ACUTEST_COLOR_GREEN_INTENSIVE_, "SUCCESS: ");
+                printf("All conditions have passed.\n");
+
+                if(acutest_timer_) {
+                    acutest_line_indent_(1);
+                    printf("Duration: ");
+                    acutest_timer_print_diff_();
+                    printf("\n");
+                }
+            } else {
+                acutest_colored_printf_(ACUTEST_COLOR_RED_INTENSIVE_, "FAILED: ");
+                if(!acutest_was_aborted_) {
+                    printf("%d condition%s %s failed.\n",
+                            acutest_test_failures_,
+                            (acutest_test_failures_ == 1) ? "" : "s",
+                            (acutest_test_failures_ == 1) ? "has" : "have");
+                } else {
+                    printf("Aborted.\n");
+                }
+            }
+            printf("\n");
+        } else if(acutest_verbose_level_ >= 1 && acutest_test_failures_ == 0) {
+            acutest_finish_test_line_(0);
+        }
+
+        status = (acutest_test_failures_ == 0) ? 0 : -1;
+
+#ifdef __cplusplus
+    } catch(std::exception& e) {
+        const char* what = e.what();
+        acutest_check_(0, NULL, 0, "Threw std::exception");
+        if(what != NULL)
+            acutest_message_("std::exception::what(): %s", what);
+
+        if(acutest_verbose_level_ >= 3) {
+            acutest_line_indent_(1);
+            acutest_colored_printf_(ACUTEST_COLOR_RED_INTENSIVE_, "FAILED: ");
+            printf("C++ exception.\n\n");
+        }
+    } catch(...) {
+        acutest_check_(0, NULL, 0, "Threw an exception");
+
+        if(acutest_verbose_level_ >= 3) {
+            acutest_line_indent_(1);
+            acutest_colored_printf_(ACUTEST_COLOR_RED_INTENSIVE_, "FAILED: ");
+            printf("C++ exception.\n\n");
+        }
+    }
+#endif
+
+    acutest_fini_(test->name);
+    acutest_case_(NULL);
+    acutest_current_test_ = NULL;
+
+    return status;
+}
+
+/* Trigger the unit test. If possible (and not suppressed) it starts a child
+ * process who calls acutest_do_run_(), otherwise it calls acutest_do_run_()
+ * directly. */
+static void
+acutest_run_(const struct acutest_test_* test, int index, int master_index)
+{
+    int failed = 1;
+    acutest_timer_type_ start, end;
+
+    acutest_current_test_ = test;
+    acutest_test_already_logged_ = 0;
+    acutest_timer_get_time_(&start);
+
+    if(!acutest_no_exec_) {
+
+#if defined(ACUTEST_UNIX_)
+
+        pid_t pid;
+        int exit_code;
+
+        /* Make sure the child starts with empty I/O buffers. */
+        fflush(stdout);
+        fflush(stderr);
+
+        pid = fork();
+        if(pid == (pid_t)-1) {
+            acutest_error_("Cannot fork. %s [%d]", strerror(errno), errno);
+            failed = 1;
+        } else if(pid == 0) {
+            /* Child: Do the test. */
+            acutest_worker_ = 1;
+            failed = (acutest_do_run_(test, index) != 0);
+            acutest_exit_(failed ? 1 : 0);
+        } else {
+            /* Parent: Wait until child terminates and analyze its exit code. */
+            waitpid(pid, &exit_code, 0);
+            if(WIFEXITED(exit_code)) {
+                switch(WEXITSTATUS(exit_code)) {
+                    case 0:   failed = 0; break;   /* test has passed. */
+                    case 1:   /* noop */ break;    /* "normal" failure. */
+                    default:  acutest_error_("Unexpected exit code [%d]", WEXITSTATUS(exit_code));
+                }
+            } else if(WIFSIGNALED(exit_code)) {
+                char tmp[32];
+                const char* signame;
+                switch(WTERMSIG(exit_code)) {
+                    case SIGINT:  signame = "SIGINT"; break;
+                    case SIGHUP:  signame = "SIGHUP"; break;
+                    case SIGQUIT: signame = "SIGQUIT"; break;
+                    case SIGABRT: signame = "SIGABRT"; break;
+                    case SIGKILL: signame = "SIGKILL"; break;
+                    case SIGSEGV: signame = "SIGSEGV"; break;
+                    case SIGILL:  signame = "SIGILL"; break;
+                    case SIGTERM: signame = "SIGTERM"; break;
+                    default:      sprintf(tmp, "signal %d", WTERMSIG(exit_code)); signame = tmp; break;
+                }
+                acutest_error_("Test interrupted by %s.", signame);
+            } else {
+                acutest_error_("Test ended in an unexpected way [%d].", exit_code);
+            }
+        }
+
+#elif defined(ACUTEST_WIN_)
+
+        char buffer[512] = {0};
+        STARTUPINFOA startupInfo;
+        PROCESS_INFORMATION processInfo;
+        DWORD exitCode;
+
+        /* Windows has no fork(). So we propagate all info into the child
+         * through a command line arguments. */
+        _snprintf(buffer, sizeof(buffer)-1,
+                 "%s --worker=%d %s --no-exec --no-summary %s --verbose=%d --color=%s -- \"%s\"",
+                 acutest_argv0_, index, acutest_timer_ ? "--time" : "",
+                 acutest_tap_ ? "--tap" : "", acutest_verbose_level_,
+                 acutest_colorize_ ? "always" : "never",
+                 test->name);
+        memset(&startupInfo, 0, sizeof(startupInfo));
+        startupInfo.cb = sizeof(STARTUPINFO);
+        if(CreateProcessA(NULL, buffer, NULL, NULL, FALSE, 0, NULL, NULL, &startupInfo, &processInfo)) {
+            WaitForSingleObject(processInfo.hProcess, INFINITE);
+            GetExitCodeProcess(processInfo.hProcess, &exitCode);
+            CloseHandle(processInfo.hThread);
+            CloseHandle(processInfo.hProcess);
+            failed = (exitCode != 0);
+            if(exitCode > 1) {
+                switch(exitCode) {
+                    case 3:             acutest_error_("Aborted."); break;
+                    case 0xC0000005:    acutest_error_("Access violation."); break;
+                    default:            acutest_error_("Test ended in an unexpected way [%lu].", exitCode); break;
+                }
+            }
+        } else {
+            acutest_error_("Cannot create unit test subprocess [%ld].", GetLastError());
+            failed = 1;
+        }
+
+#else
+
+        /* A platform where we don't know how to run child process. */
+        failed = (acutest_do_run_(test, index) != 0);
+
+#endif
+
+    } else {
+        /* Child processes suppressed through --no-exec. */
+        failed = (acutest_do_run_(test, index) != 0);
+    }
+    acutest_timer_get_time_(&end);
+
+    acutest_current_test_ = NULL;
+
+    acutest_stat_run_units_++;
+    if(failed)
+        acutest_stat_failed_units_++;
+
+    acutest_set_success_(master_index, !failed);
+    acutest_set_duration_(master_index, acutest_timer_diff_(start, end));
+}
+
+#if defined(ACUTEST_WIN_)
+/* Callback for SEH events. */
+static LONG CALLBACK
+acutest_seh_exception_filter_(EXCEPTION_POINTERS *ptrs)
+{
+    acutest_check_(0, NULL, 0, "Unhandled SEH exception");
+    acutest_message_("Exception code:    0x%08lx", ptrs->ExceptionRecord->ExceptionCode);
+    acutest_message_("Exception address: 0x%p", ptrs->ExceptionRecord->ExceptionAddress);
+
+    fflush(stdout);
+    fflush(stderr);
+
+    return EXCEPTION_EXECUTE_HANDLER;
+}
+#endif
+
+
+#define ACUTEST_CMDLINE_OPTFLAG_OPTIONALARG_    0x0001
+#define ACUTEST_CMDLINE_OPTFLAG_REQUIREDARG_    0x0002
+
+#define ACUTEST_CMDLINE_OPTID_NONE_             0
+#define ACUTEST_CMDLINE_OPTID_UNKNOWN_          (-0x7fffffff + 0)
+#define ACUTEST_CMDLINE_OPTID_MISSINGARG_       (-0x7fffffff + 1)
+#define ACUTEST_CMDLINE_OPTID_BOGUSARG_         (-0x7fffffff + 2)
+
+typedef struct acutest_test_CMDLINE_OPTION_ {
+    char shortname;
+    const char* longname;
+    int id;
+    unsigned flags;
+} ACUTEST_CMDLINE_OPTION_;
+
+static int
+acutest_cmdline_handle_short_opt_group_(const ACUTEST_CMDLINE_OPTION_* options,
+                    const char* arggroup,
+                    int (*callback)(int /*optval*/, const char* /*arg*/))
+{
+    const ACUTEST_CMDLINE_OPTION_* opt;
+    int i;
+    int ret = 0;
+
+    for(i = 0; arggroup[i] != '\0'; i++) {
+        for(opt = options; opt->id != 0; opt++) {
+            if(arggroup[i] == opt->shortname)
+                break;
+        }
+
+        if(opt->id != 0  &&  !(opt->flags & ACUTEST_CMDLINE_OPTFLAG_REQUIREDARG_)) {
+            ret = callback(opt->id, NULL);
+        } else {
+            /* Unknown option. */
+            char badoptname[3];
+            badoptname[0] = '-';
+            badoptname[1] = arggroup[i];
+            badoptname[2] = '\0';
+            ret = callback((opt->id != 0 ? ACUTEST_CMDLINE_OPTID_MISSINGARG_ : ACUTEST_CMDLINE_OPTID_UNKNOWN_),
+                            badoptname);
+        }
+
+        if(ret != 0)
+            break;
+    }
+
+    return ret;
+}
+
+#define ACUTEST_CMDLINE_AUXBUF_SIZE_  32
+
+static int
+acutest_cmdline_read_(const ACUTEST_CMDLINE_OPTION_* options, int argc, char** argv,
+                      int (*callback)(int /*optval*/, const char* /*arg*/))
+{
+
+    const ACUTEST_CMDLINE_OPTION_* opt;
+    char auxbuf[ACUTEST_CMDLINE_AUXBUF_SIZE_+1];
+    int after_doubledash = 0;
+    int i = 1;
+    int ret = 0;
+
+    auxbuf[ACUTEST_CMDLINE_AUXBUF_SIZE_] = '\0';
+
+    while(i < argc) {
+        if(after_doubledash  ||  strcmp(argv[i], "-") == 0) {
+            /* Non-option argument. */
+            ret = callback(ACUTEST_CMDLINE_OPTID_NONE_, argv[i]);
+        } else if(strcmp(argv[i], "--") == 0) {
+            /* End of options. All the remaining members are non-option arguments. */
+            after_doubledash = 1;
+        } else if(argv[i][0] != '-') {
+            /* Non-option argument. */
+            ret = callback(ACUTEST_CMDLINE_OPTID_NONE_, argv[i]);
+        } else {
+            for(opt = options; opt->id != 0; opt++) {
+                if(opt->longname != NULL  &&  strncmp(argv[i], "--", 2) == 0) {
+                    size_t len = strlen(opt->longname);
+                    if(strncmp(argv[i]+2, opt->longname, len) == 0) {
+                        /* Regular long option. */
+                        if(argv[i][2+len] == '\0') {
+                            /* with no argument provided. */
+                            if(!(opt->flags & ACUTEST_CMDLINE_OPTFLAG_REQUIREDARG_))
+                                ret = callback(opt->id, NULL);
+                            else
+                                ret = callback(ACUTEST_CMDLINE_OPTID_MISSINGARG_, argv[i]);
+                            break;
+                        } else if(argv[i][2+len] == '=') {
+                            /* with an argument provided. */
+                            if(opt->flags & (ACUTEST_CMDLINE_OPTFLAG_OPTIONALARG_ | ACUTEST_CMDLINE_OPTFLAG_REQUIREDARG_)) {
+                                ret = callback(opt->id, argv[i]+2+len+1);
+                            } else {
+                                sprintf(auxbuf, "--%s", opt->longname);
+                                ret = callback(ACUTEST_CMDLINE_OPTID_BOGUSARG_, auxbuf);
+                            }
+                            break;
+                        } else {
+                            continue;
+                        }
+                    }
+                } else if(opt->shortname != '\0'  &&  argv[i][0] == '-') {
+                    if(argv[i][1] == opt->shortname) {
+                        /* Regular short option. */
+                        if(opt->flags & ACUTEST_CMDLINE_OPTFLAG_REQUIREDARG_) {
+                            if(argv[i][2] != '\0')
+                                ret = callback(opt->id, argv[i]+2);
+                            else if(i+1 < argc)
+                                ret = callback(opt->id, argv[++i]);
+                            else
+                                ret = callback(ACUTEST_CMDLINE_OPTID_MISSINGARG_, argv[i]);
+                            break;
+                        } else {
+                            ret = callback(opt->id, NULL);
+
+                            /* There might be more (argument-less) short options
+                             * grouped together. */
+                            if(ret == 0  &&  argv[i][2] != '\0')
+                                ret = acutest_cmdline_handle_short_opt_group_(options, argv[i]+2, callback);
+                            break;
+                        }
+                    }
+                }
+            }
+
+            if(opt->id == 0) {  /* still not handled? */
+                if(argv[i][0] != '-') {
+                    /* Non-option argument. */
+                    ret = callback(ACUTEST_CMDLINE_OPTID_NONE_, argv[i]);
+                } else {
+                    /* Unknown option. */
+                    char* badoptname = argv[i];
+
+                    if(strncmp(badoptname, "--", 2) == 0) {
+                        /* Strip any argument from the long option. */
+                        char* assignment = strchr(badoptname, '=');
+                        if(assignment != NULL) {
+                            size_t len = assignment - badoptname;
+                            if(len > ACUTEST_CMDLINE_AUXBUF_SIZE_)
+                                len = ACUTEST_CMDLINE_AUXBUF_SIZE_;
+                            strncpy(auxbuf, badoptname, len);
+                            auxbuf[len] = '\0';
+                            badoptname = auxbuf;
+                        }
+                    }
+
+                    ret = callback(ACUTEST_CMDLINE_OPTID_UNKNOWN_, badoptname);
+                }
+            }
+        }
+
+        if(ret != 0)
+            return ret;
+        i++;
+    }
+
+    return ret;
+}
+
+static void
+acutest_help_(void)
+{
+    printf("Usage: %s [options] [test...]\n", acutest_argv0_);
+    printf("\n");
+    printf("Run the specified unit tests; or if the option '--skip' is used, run all\n");
+    printf("tests in the suite but those listed.  By default, if no tests are specified\n");
+    printf("on the command line, all unit tests in the suite are run.\n");
+    printf("\n");
+    printf("Options:\n");
+    printf("  -s, --skip            Execute all unit tests but the listed ones\n");
+    printf("      --exec[=WHEN]     If supported, execute unit tests as child processes\n");
+    printf("                          (WHEN is one of 'auto', 'always', 'never')\n");
+    printf("  -E, --no-exec         Same as --exec=never\n");
+#if defined ACUTEST_WIN_
+    printf("  -t, --time            Measure test duration\n");
+#elif defined ACUTEST_HAS_POSIX_TIMER_
+    printf("  -t, --time            Measure test duration (real time)\n");
+    printf("      --time=TIMER      Measure test duration, using given timer\n");
+    printf("                          (TIMER is one of 'real', 'cpu')\n");
+#endif
+    printf("      --no-summary      Suppress printing of test results summary\n");
+    printf("      --tap             Produce TAP-compliant output\n");
+    printf("                          (See https://testanything.org/)\n");
+    printf("  -x, --xml-output=FILE Enable XUnit output to the given file\n");
+    printf("  -l, --list            List unit tests in the suite and exit\n");
+    printf("  -v, --verbose         Make output more verbose\n");
+    printf("      --verbose=LEVEL   Set verbose level to LEVEL:\n");
+    printf("                          0 ... Be silent\n");
+    printf("                          1 ... Output one line per test (and summary)\n");
+    printf("                          2 ... As 1 and failed conditions (this is default)\n");
+    printf("                          3 ... As 1 and all conditions (and extended summary)\n");
+    printf("  -q, --quiet           Same as --verbose=0\n");
+    printf("      --color[=WHEN]    Enable colorized output\n");
+    printf("                          (WHEN is one of 'auto', 'always', 'never')\n");
+    printf("      --no-color        Same as --color=never\n");
+    printf("  -h, --help            Display this help and exit\n");
+
+    if(acutest_list_size_ < 16) {
+        printf("\n");
+        acutest_list_names_();
+    }
+}
+
+static const ACUTEST_CMDLINE_OPTION_ acutest_cmdline_options_[] = {
+    { 's',  "skip",         's', 0 },
+    {  0,   "exec",         'e', ACUTEST_CMDLINE_OPTFLAG_OPTIONALARG_ },
+    { 'E',  "no-exec",      'E', 0 },
+#if defined ACUTEST_WIN_
+    { 't',  "time",         't', 0 },
+    {  0,   "timer",        't', 0 },   /* kept for compatibility */
+#elif defined ACUTEST_HAS_POSIX_TIMER_
+    { 't',  "time",         't', ACUTEST_CMDLINE_OPTFLAG_OPTIONALARG_ },
+    {  0,   "timer",        't', ACUTEST_CMDLINE_OPTFLAG_OPTIONALARG_ },  /* kept for compatibility */
+#endif
+    {  0,   "no-summary",   'S', 0 },
+    {  0,   "tap",          'T', 0 },
+    { 'l',  "list",         'l', 0 },
+    { 'v',  "verbose",      'v', ACUTEST_CMDLINE_OPTFLAG_OPTIONALARG_ },
+    { 'q',  "quiet",        'q', 0 },
+    {  0,   "color",        'c', ACUTEST_CMDLINE_OPTFLAG_OPTIONALARG_ },
+    {  0,   "no-color",     'C', 0 },
+    { 'h',  "help",         'h', 0 },
+    {  0,   "worker",       'w', ACUTEST_CMDLINE_OPTFLAG_REQUIREDARG_ },  /* internal */
+    { 'x',  "xml-output",   'x', ACUTEST_CMDLINE_OPTFLAG_REQUIREDARG_ },
+    {  0,   NULL,            0,  0 }
+};
+
+static int
+acutest_cmdline_callback_(int id, const char* arg)
+{
+    switch(id) {
+        case 's':
+            acutest_skip_mode_ = 1;
+            break;
+
+        case 'e':
+            if(arg == NULL || strcmp(arg, "always") == 0) {
+                acutest_no_exec_ = 0;
+            } else if(strcmp(arg, "never") == 0) {
+                acutest_no_exec_ = 1;
+            } else if(strcmp(arg, "auto") == 0) {
+                /*noop*/
+            } else {
+                fprintf(stderr, "%s: Unrecognized argument '%s' for option --exec.\n", acutest_argv0_, arg);
+                fprintf(stderr, "Try '%s --help' for more information.\n", acutest_argv0_);
+                acutest_exit_(2);
+            }
+            break;
+
+        case 'E':
+            acutest_no_exec_ = 1;
+            break;
+
+        case 't':
+#if defined ACUTEST_WIN_  ||  defined ACUTEST_HAS_POSIX_TIMER_
+            if(arg == NULL || strcmp(arg, "real") == 0) {
+                acutest_timer_ = 1;
+    #ifndef ACUTEST_WIN_
+            } else if(strcmp(arg, "cpu") == 0) {
+                acutest_timer_ = 2;
+    #endif
+            } else {
+                fprintf(stderr, "%s: Unrecognized argument '%s' for option --time.\n", acutest_argv0_, arg);
+                fprintf(stderr, "Try '%s --help' for more information.\n", acutest_argv0_);
+                acutest_exit_(2);
+            }
+#endif
+            break;
+
+        case 'S':
+            acutest_no_summary_ = 1;
+            break;
+
+        case 'T':
+            acutest_tap_ = 1;
+            break;
+
+        case 'l':
+            acutest_list_names_();
+            acutest_exit_(0);
+            break;
+
+        case 'v':
+            acutest_verbose_level_ = (arg != NULL ? atoi(arg) : acutest_verbose_level_+1);
+            break;
+
+        case 'q':
+            acutest_verbose_level_ = 0;
+            break;
+
+        case 'c':
+            if(arg == NULL || strcmp(arg, "always") == 0) {
+                acutest_colorize_ = 1;
+            } else if(strcmp(arg, "never") == 0) {
+                acutest_colorize_ = 0;
+            } else if(strcmp(arg, "auto") == 0) {
+                /*noop*/
+            } else {
+                fprintf(stderr, "%s: Unrecognized argument '%s' for option --color.\n", acutest_argv0_, arg);
+                fprintf(stderr, "Try '%s --help' for more information.\n", acutest_argv0_);
+                acutest_exit_(2);
+            }
+            break;
+
+        case 'C':
+            acutest_colorize_ = 0;
+            break;
+
+        case 'h':
+            acutest_help_();
+            acutest_exit_(0);
+            break;
+
+        case 'w':
+            acutest_worker_ = 1;
+            acutest_worker_index_ = atoi(arg);
+            break;
+        case 'x':
+            acutest_xml_output_ = fopen(arg, "w");
+            if (!acutest_xml_output_) {
+                fprintf(stderr, "Unable to open '%s': %s\n", arg, strerror(errno));
+                acutest_exit_(2);
+            }
+            break;
+
+        case 0:
+            if(acutest_lookup_(arg) == 0) {
+                fprintf(stderr, "%s: Unrecognized unit test '%s'\n", acutest_argv0_, arg);
+                fprintf(stderr, "Try '%s --list' for list of unit tests.\n", acutest_argv0_);
+                acutest_exit_(2);
+            }
+            break;
+
+        case ACUTEST_CMDLINE_OPTID_UNKNOWN_:
+            fprintf(stderr, "Unrecognized command line option '%s'.\n", arg);
+            fprintf(stderr, "Try '%s --help' for more information.\n", acutest_argv0_);
+            acutest_exit_(2);
+            break;
+
+        case ACUTEST_CMDLINE_OPTID_MISSINGARG_:
+            fprintf(stderr, "The command line option '%s' requires an argument.\n", arg);
+            fprintf(stderr, "Try '%s --help' for more information.\n", acutest_argv0_);
+            acutest_exit_(2);
+            break;
+
+        case ACUTEST_CMDLINE_OPTID_BOGUSARG_:
+            fprintf(stderr, "The command line option '%s' does not expect an argument.\n", arg);
+            fprintf(stderr, "Try '%s --help' for more information.\n", acutest_argv0_);
+            acutest_exit_(2);
+            break;
+    }
+
+    return 0;
+}
+
+
+#ifdef ACUTEST_LINUX_
+static int
+acutest_is_tracer_present_(void)
+{
+    /* Must be large enough so the line 'TracerPid: ${PID}' can fit in. */
+    static const int OVERLAP = 32;
+
+    char buf[256+OVERLAP+1];
+    int tracer_present = 0;
+    int fd;
+    size_t n_read = 0;
+
+    fd = open("/proc/self/status", O_RDONLY);
+    if(fd == -1)
+        return 0;
+
+    while(1) {
+        static const char pattern[] = "TracerPid:";
+        const char* field;
+
+        while(n_read < sizeof(buf) - 1) {
+            ssize_t n;
+
+            n = read(fd, buf + n_read, sizeof(buf) - 1 - n_read);
+            if(n <= 0)
+                break;
+            n_read += n;
+        }
+        buf[n_read] = '\0';
+
+        field = strstr(buf, pattern);
+        if(field != NULL  &&  field < buf + sizeof(buf) - OVERLAP) {
+            pid_t tracer_pid = (pid_t) atoi(field + sizeof(pattern) - 1);
+            tracer_present = (tracer_pid != 0);
+            break;
+        }
+
+        if(n_read == sizeof(buf)-1) {
+            memmove(buf, buf + sizeof(buf)-1 - OVERLAP, OVERLAP);
+            n_read = OVERLAP;
+        } else {
+            break;
+        }
+    }
+
+    close(fd);
+    return tracer_present;
+}
+#endif
+
+int
+main(int argc, char** argv)
+{
+    int i;
+
+    acutest_argv0_ = argv[0];
+
+#if defined ACUTEST_UNIX_
+    acutest_colorize_ = isatty(STDOUT_FILENO);
+#elif defined ACUTEST_WIN_
+ #if defined _BORLANDC_
+    acutest_colorize_ = isatty(_fileno(stdout));
+ #else
+    acutest_colorize_ = _isatty(_fileno(stdout));
+ #endif
+#else
+    acutest_colorize_ = 0;
+#endif
+
+    /* Count all test units */
+    acutest_list_size_ = 0;
+    for(i = 0; acutest_list_[i].func != NULL; i++)
+        acutest_list_size_++;
+
+    acutest_test_data_ = (struct acutest_test_data_*)calloc(acutest_list_size_, sizeof(struct acutest_test_data_));
+    if(acutest_test_data_ == NULL) {
+        fprintf(stderr, "Out of memory.\n");
+        acutest_exit_(2);
+    }
+
+    /* Parse options */
+    acutest_cmdline_read_(acutest_cmdline_options_, argc, argv, acutest_cmdline_callback_);
+
+    /* Initialize the proper timer. */
+    acutest_timer_init_();
+
+#if defined(ACUTEST_WIN_)
+    SetUnhandledExceptionFilter(acutest_seh_exception_filter_);
+#ifdef _MSC_VER
+    _set_abort_behavior(0, _WRITE_ABORT_MSG);
+#endif
+#endif
+
+    /* By default, we want to run all tests. */
+    if(acutest_count_ == 0) {
+        for(i = 0; acutest_list_[i].func != NULL; i++)
+            acutest_remember_(i);
+    }
+
+    /* Guess whether we want to run unit tests as child processes. */
+    if(acutest_no_exec_ < 0) {
+        acutest_no_exec_ = 0;
+
+        if(acutest_count_ <= 1) {
+            acutest_no_exec_ = 1;
+        } else {
+#ifdef ACUTEST_WIN_
+            if(IsDebuggerPresent())
+                acutest_no_exec_ = 1;
+#endif
+#ifdef ACUTEST_LINUX_
+            if(acutest_is_tracer_present_())
+                acutest_no_exec_ = 1;
+#endif
+#ifdef RUNNING_ON_VALGRIND
+            /* RUNNING_ON_VALGRIND is provided by optionally included <valgrind.h> */
+            if(RUNNING_ON_VALGRIND)
+                acutest_no_exec_ = 1;
+#endif
+        }
+    }
+
+    if(acutest_tap_) {
+        /* TAP requires we know test result ("ok", "not ok") before we output
+         * anything about the test, and this gets problematic for larger verbose
+         * levels. */
+        if(acutest_verbose_level_ > 2)
+            acutest_verbose_level_ = 2;
+
+        /* TAP harness should provide some summary. */
+        acutest_no_summary_ = 1;
+
+        if(!acutest_worker_)
+            printf("1..%d\n", (int) acutest_count_);
+    }
+
+    int index = acutest_worker_index_;
+    for(i = 0; acutest_list_[i].func != NULL; i++) {
+        int run = (acutest_test_data_[i].flags & ACUTEST_FLAG_RUN_);
+        if (acutest_skip_mode_) /* Run all tests except those listed. */
+            run = !run;
+        if(run)
+            acutest_run_(&acutest_list_[i], index++, i);
+    }
+
+    /* Write a summary */
+    if(!acutest_no_summary_ && acutest_verbose_level_ >= 1) {
+        if(acutest_verbose_level_ >= 3) {
+            acutest_colored_printf_(ACUTEST_COLOR_DEFAULT_INTENSIVE_, "Summary:\n");
+
+            printf("  Count of all unit tests:     %4d\n", (int) acutest_list_size_);
+            printf("  Count of run unit tests:     %4d\n", acutest_stat_run_units_);
+            printf("  Count of failed unit tests:  %4d\n", acutest_stat_failed_units_);
+            printf("  Count of skipped unit tests: %4d\n", (int) acutest_list_size_ - acutest_stat_run_units_);
+        }
+
+        if(acutest_stat_failed_units_ == 0) {
+            acutest_colored_printf_(ACUTEST_COLOR_GREEN_INTENSIVE_, "SUCCESS:");
+            printf(" All unit tests have passed.\n");
+        } else {
+            acutest_colored_printf_(ACUTEST_COLOR_RED_INTENSIVE_, "FAILED:");
+            printf(" %d of %d unit tests %s failed.\n",
+                    acutest_stat_failed_units_, acutest_stat_run_units_,
+                    (acutest_stat_failed_units_ == 1) ? "has" : "have");
+        }
+
+        if(acutest_verbose_level_ >= 3)
+            printf("\n");
+    }
+
+    if (acutest_xml_output_) {
+#if defined ACUTEST_UNIX_
+        char *suite_name = basename(argv[0]);
+#elif defined ACUTEST_WIN_
+        char suite_name[_MAX_FNAME];
+        _splitpath(argv[0], NULL, NULL, suite_name, NULL);
+#else
+        const char *suite_name = argv[0];
+#endif
+        fprintf(acutest_xml_output_, "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n");
+        fprintf(acutest_xml_output_, "<testsuite name=\"%s\" tests=\"%d\" errors=\"%d\" failures=\"%d\" skip=\"%d\">\n",
+            suite_name, (int)acutest_list_size_, acutest_stat_failed_units_, acutest_stat_failed_units_,
+            (int)acutest_list_size_ - acutest_stat_run_units_);
+        for(i = 0; acutest_list_[i].func != NULL; i++) {
+            struct acutest_test_data_ *details = &acutest_test_data_[i];
+            fprintf(acutest_xml_output_, "  <testcase name=\"%s\" time=\"%.2f\">\n", acutest_list_[i].name, details->duration);
+            if (details->flags & ACUTEST_FLAG_FAILURE_)
+                fprintf(acutest_xml_output_, "    <failure />\n");
+            if (!(details->flags & ACUTEST_FLAG_FAILURE_) && !(details->flags & ACUTEST_FLAG_SUCCESS_))
+                fprintf(acutest_xml_output_, "    <skipped />\n");
+            fprintf(acutest_xml_output_, "  </testcase>\n");
+        }
+        fprintf(acutest_xml_output_, "</testsuite>\n");
+        fclose(acutest_xml_output_);
+    }
+
+    acutest_cleanup_();
+
+    return (acutest_stat_failed_units_ == 0) ? 0 : 1;
+}
+
+
+#endif  /* #ifndef TEST_NO_MAIN */
+
+#ifdef _MSC_VER
+    #pragma warning(pop)
+#endif
+
+#ifdef __cplusplus
+    }  /* extern "C" */
+#endif
+
+#endif  /* #ifndef ACUTEST_H */