/*

 * Check: a unit test framework for C

 * Copyright (C) 2001, 2002 Arien Malec

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2.1 of the License, or (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with this library; if not, write to the

 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,

 * MA 02110-1301, USA.

 */

#ifndef LIBCOMPAT_H

#define LIBCOMPAT_H

#if HAVE_CONFIG_H

#include <config.h>

#endif

#if defined(__GNUC__) && defined(__GNUC_MINOR__)

#define GCC_VERSION_AT_LEAST(major, minor) \

((__GNUC__ > (major)) || \

 (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))

#else

#define GCC_VERSION_AT_LEAST(major, minor) 0

#endif

#if GCC_VERSION_AT_LEAST(2,95)

#define CK_ATTRIBUTE_UNUSED __attribute__ ((unused))

#else

#define CK_ATTRIBUTE_UNUSED

#endif /* GCC 2.95 */

#if GCC_VERSION_AT_LEAST(2,5)

#define CK_ATTRIBUTE_NORETURN __attribute__ ((noreturn))

#else

#define CK_ATTRIBUTE_NORETURN

#endif /* GCC 2.5 */

/*

 * Used for MSVC to create the export attribute

 * CK_DLL_EXP is defined during the compilation of the library

 * on the command line.

 */

#ifndef CK_DLL_EXP

#define CK_DLL_EXP

#endif

#if defined(_MSC_VER)

#include <WinSock2.h>           /* struct timeval, API used in gettimeofday implementation */

#include <io.h>                 /* read, write */

#include <process.h>            /* getpid */

#endif /* _MSC_VER */

/* defines size_t */

#include <sys/types.h>

/* provides assert */

#include <assert.h>

/* defines FILE */

#include <stdio.h>

/* defines exit() */

#include <stdlib.h>

/* defines NAN, INFINITY, isnan(), isinf(), isfinite() */

#include <math.h>

/* However, some older Visual Studio Versions do not */

#if !defined(INFINITY) || !defined(NAN)

extern double DOUBLE_ZERO;

#define INFINITY (1.0/DOUBLE_ZERO)

#define NAN (DOUBLE_ZERO/DOUBLE_ZERO)

#endif

#if !defined(isnan) || !defined(isinf) || !defined(isfinite)

#define NEED_fpclassify

extern int fpclassify(double d);

#define FP_INFINITE (1)

#define FP_NAN (2)

#define FP_ZERO (4)

#define FP_NORMAL (8)

#define FP_SUBNORMAL (16)

#define isnan(x) ((fpclassify((double)(x)) & FP_NAN) == FP_NAN)

#define isinf(x) ((fpclassify((double)(x)) & FP_INFINITE) == FP_INFINITE)

#define isfinite(x) ((fpclassify((double)(x)) & (FP_NAN|FP_INFINITE)) == 0)

#endif

/* provides localtime and struct tm */

#ifdef HAVE_SYS_TIME_H

#include <sys/time.h>

#endif /* !HAVE_SYS_TIME_H */

#include <time.h>

/* declares fork(), _POSIX_VERSION.  according to Autoconf.info,

   unistd.h defines _POSIX_VERSION if the system is POSIX-compliant,

   so we will use this as a test for all things uniquely provided by

   POSIX like sigaction() and fork() */

#ifdef HAVE_UNISTD_H

#include <unistd.h>

#endif

#ifdef HAVE_SYS_WAIT_H

#include <sys/wait.h>

#endif

/* declares pthread_create and friends */

#ifdef HAVE_PTHREAD

#include <pthread.h>

#endif

#ifdef HAVE_STDINT_H

#include <stdint.h>

#endif

/* replacement functions for broken originals */

#if !HAVE_DECL_ALARM

CK_DLL_EXP unsigned int alarm(unsigned int seconds);

#endif /* !HAVE_DECL_ALARM */

#if !HAVE_MALLOC

CK_DLL_EXP void *rpl_malloc(size_t n);

#endif /* !HAVE_MALLOC */

#if !HAVE_REALLOC

CK_DLL_EXP void *rpl_realloc(void *p, size_t n);

#endif /* !HAVE_REALLOC */

#if !HAVE_GETPID && HAVE__GETPID

#define getpid _getpid

#endif /* !HAVE_GETPID && HAVE__GETPID */

#if !HAVE_GETTIMEOFDAY

CK_DLL_EXP int gettimeofday(struct timeval *tv, void *tz);

#endif /* !HAVE_GETTIMEOFDAY */

#if !HAVE_DECL_LOCALTIME_R

#if !defined(localtime_r)

CK_DLL_EXP struct tm *localtime_r(const time_t * clock, struct tm *result);

#endif

#endif /* !HAVE_DECL_LOCALTIME_R */

#if !HAVE_DECL_STRDUP && !HAVE__STRDUP

CK_DLL_EXP char *strdup(const char *str);

#elif !HAVE_DECL_STRDUP && HAVE__STRDUP

#define strdup _strdup

#endif /* !HAVE_DECL_STRDUP && HAVE__STRDUP */

#if !HAVE_DECL_STRSIGNAL

CK_DLL_EXP char *strsignal(int sig);

#endif /* !HAVE_DECL_STRSIGNAL */

/*

 * On systems where clock_gettime() is not available, or

 * on systems where some clocks may not be supported, the

 * definition for CLOCK_MONOTONIC and CLOCK_REALTIME may not

 * be available. These should define which type of clock

 * clock_gettime() should use. We define it here if it is

 * not defined simply so the reimplementation can ignore it.

 *

 * We set the values of these clocks to some (hopefully)

 * invalid value, to avoid the case where we define a

 * clock with a valid value, and unintentionally use

 * an actual good clock by accident.

 */

#ifndef CLOCK_MONOTONIC

#define CLOCK_MONOTONIC -1

#endif

#ifndef CLOCK_REALTIME

#define CLOCK_REALTIME -1

#endif

#ifndef HAVE_LIBRT

#ifdef STRUCT_TIMESPEC_DEFINITION_MISSING

/*

 * The following structure is defined in POSIX 1003.1 for times

 * specified in seconds and nanoseconds. If it is not defined in

 * time.g, then we need to define it here

 */

struct timespec

{

    time_t tv_sec;

    long tv_nsec;

};

#endif /* STRUCT_TIMESPEC_DEFINITION_MISSING */

#ifdef STRUCT_ITIMERSPEC_DEFINITION_MISSING

/* 

 * The following structure is defined in POSIX.1b for timer start values and intervals.

 * If it is not defined in time.h, then we need to define it here.

 */

struct itimerspec

{

    struct timespec it_interval;

    struct timespec it_value;

};

#endif /* STRUCT_ITIMERSPEC_DEFINITION_MISSING */

/* 

 * Do a simple forward declaration in case the struct is not defined.

 * In the versions of timer_create in libcompat, sigevent is never

 * used.

 */

struct sigevent;

CK_DLL_EXP int clock_gettime(clockid_t clk_id, struct timespec *ts);

CK_DLL_EXP int timer_create(clockid_t clockid, struct sigevent *sevp,

                            timer_t * timerid);

CK_DLL_EXP int timer_settime(timer_t timerid, int flags,

                             const struct itimerspec *new_value,

                             struct itimerspec *old_value);

CK_DLL_EXP int timer_delete(timer_t timerid);

#endif /* HAVE_LIBRT */

/*

 * The following checks are to determine if the system's

 * snprintf (or its variants) should be replaced with

 * the C99 compliant version in libcompat.

 */

#if HAVE_CONFIG_H

#include <config.h>

#endif

#if HAVE_STDARG_H

#include <stdarg.h>

#if !HAVE_VSNPRINTF

CK_DLL_EXP int rpl_vsnprintf(char *, size_t, const char *, va_list);

#define vsnprintf rpl_vsnprintf

#endif

#if !HAVE_SNPRINTF

CK_DLL_EXP int rpl_snprintf(char *, size_t, const char *, ...);

#define snprintf rpl_snprintf

#endif

#endif /* HAVE_STDARG_H */

#if !HAVE_GETLINE

CK_DLL_EXP ssize_t getline(char **lineptr, size_t *n, FILE *stream);

#endif

/* silence warnings about an empty library */

CK_DLL_EXP void ck_do_nothing(void) CK_ATTRIBUTE_NORETURN;

#endif /* !LIBCOMPAT_H */