libxml2/include/win32config.h

#ifndef __LIBXML_WIN32_CONFIG__
#define __LIBXML_WIN32_CONFIG__

#define HAVE_CTYPE_H
#define HAVE_STDARG_H
#define HAVE_MALLOC_H
#define HAVE_ERRNO_H

#ifdef _WIN32_WCE
#undef HAVE_ERRNO_H
#include <windows.h>
#include "wincecompat.h"
#else
#define HAVE_SYS_STAT_H
#define HAVE__STAT
#define HAVE_STAT
#define HAVE_STDLIB_H
#define HAVE_TIME_H
#define HAVE_FCNTL_H
#include <io.h>
#include <direct.h>
#endif

#include <libxml/xmlversion.h>

#ifdef NEED_SOCKETS
#include <wsockcompat.h>
#endif

#define HAVE_ISINF
#define HAVE_ISNAN
#include <math.h>
#ifdef _MSC_VER
/* MS C-runtime has functions which can be used in order to determine if
   a given floating-point variable contains NaN, (+-)INF. These are 
   preferred, because floating-point technology is considered propriatary
   by MS and we can assume that their functions know more about their 
   oddities than we do. */
#include <float.h>
/* Bjorn Reese figured a quite nice construct for isinf() using the _fpclass
   function. */
#ifndef isinf
#define isinf(d) ((_fpclass(d) == _FPCLASS_PINF) ? 1 \
	: ((_fpclass(d) == _FPCLASS_NINF) ? -1 : 0))
#endif
/* _isnan(x) returns nonzero if (x == NaN) and zero otherwise. */
#ifndef isnan
#define isnan(d) (_isnan(d))
#endif
#else /* _MSC_VER */
static int isinf (double d) {
    int expon = 0;
    double val = frexp (d, &expon);
    if (expon == 1025) {
        if (val == 0.5) {
            return 1;
        } else if (val == -0.5) {
            return -1;
        } else {
            return 0;
        }
    } else {
        return 0;
    }
}
static int isnan (double d) {
    int expon = 0;
    double val = frexp (d, &expon);
    if (expon == 1025) {
        if (val == 0.5) {
            return 0;
        } else if (val == -0.5) {
            return 0;
        } else {
            return 1;
        }
    } else {
        return 0;
    }
}
#endif /* _MSC_VER */

#ifdef _MSC_VER
/* We don't use trio when compiling under MSVC. This is not because trio
   is bad, but because MSVC has no easy way to conditionally include a .c
   file in the project. In order to enable trio usage, we would have to compile
   all trio functionality into the executable, even if we don't use it.
   Since MS C-runtime has all required functions, trio is not necessary. */
#ifdef WITH_TRIO
#undef WITH_TRIO
#endif /* WITH_TRIO */
#ifndef WITHOUT_TRIO
#define WITHOUT_TRIO
#endif /* WITHOUT_TRIO */
/* Microsoft's C runtime names all non-ANSI functions with a leading
   underscore. Since functionality is still the same, they can be used. */
#define snprintf _snprintf
#define vsnprintf _vsnprintf
#endif /* _MSC_VER */

/* Threading API to use should be specified here for compatibility reasons.
   This is however best specified on the compiler's command-line. */
#if defined(LIBXML_THREAD_ENABLED)
#if !defined(HAVE_PTHREAD_H) && !defined(HAVE_WIN32_THREADS)
#define HAVE_WIN32_THREADS
#endif
#endif

/* Some third-party libraries far from our control assume the following
   is defined, which it is not if we don't include windows.h. */
#if !defined(FALSE)
#define FALSE 0
#endif
#if !defined(TRUE)
#define TRUE (!(FALSE))
#endif

#endif /* __LIBXML_WIN32_CONFIG__ */