add initial CMake and Visual Studio build support

This moves the compatibility include files from include to
include/compat so we can use the awful MS C compiler
<../include/> trick to emulate the GNU #include_next extension.

This also removes a few old compat files we do not need anymore.

31 files changed, 1058 insertions, 130 deletions

diff --git a/include/Makefile.am b/include/Makefile.am
index 92ee9e7..c24d1ae 100644
--- a/include/Makefile.am
+++ b/include/Makefile.am
@@ -2,32 +2,36 @@ include $(top_srcdir)/Makefile.am.common
 
 SUBDIRS = openssl
 
-noinst_HEADERS = err.h
-noinst_HEADERS += netdb.h
-noinst_HEADERS += poll.h
-noinst_HEADERS += pqueue.h
-noinst_HEADERS += stdio.h
-noinst_HEADERS += stdlib.h
-noinst_HEADERS += string.h
-noinst_HEADERS += syslog.h
-noinst_HEADERS += unistd.h
-noinst_HEADERS += win32netcompat.h
+noinst_HEADERS = pqueue.h
+noinst_HEADERS += compat/dirent.h
+noinst_HEADERS += compat/dirent_msvc.h
+noinst_HEADERS += compat/err.h
+noinst_HEADERS += compat/netdb.h
+noinst_HEADERS += compat/poll.h
+noinst_HEADERS += compat/stdio.h
+noinst_HEADERS += compat/stdlib.h
+noinst_HEADERS += compat/string.h
+noinst_HEADERS += compat/time.h
+noinst_HEADERS += compat/unistd.h
+noinst_HEADERS += compat/win32netcompat.h
 
-noinst_HEADERS += arpa/inet.h
-noinst_HEADERS += arpa/nameser.h
+noinst_HEADERS += compat/arpa/inet.h
+noinst_HEADERS += compat/arpa/nameser.h
 
-noinst_HEADERS += machine/endian.h
+noinst_HEADERS += compat/machine/endian.h
 
-noinst_HEADERS += netinet/in.h
-noinst_HEADERS += netinet/tcp.h
+noinst_HEADERS += compat/netinet/in.h
+noinst_HEADERS += compat/netinet/tcp.h
 
-noinst_HEADERS += sys/cdefs.h
-noinst_HEADERS += sys/ioctl.h
-noinst_HEADERS += sys/mman.h
-noinst_HEADERS += sys/select.h
-noinst_HEADERS += sys/socket.h
-noinst_HEADERS += sys/times.h
-noinst_HEADERS += sys/types.h
-noinst_HEADERS += sys/uio.h
+noinst_HEADERS += compat/sys/cdefs.h
+noinst_HEADERS += compat/sys/ioctl.h
+noinst_HEADERS += compat/sys/mman.h
+noinst_HEADERS += compat/sys/param.h
+noinst_HEADERS += compat/sys/select.h
+noinst_HEADERS += compat/sys/stat.h
+noinst_HEADERS += compat/sys/socket.h
+noinst_HEADERS += compat/sys/time.h
+noinst_HEADERS += compat/sys/types.h
+noinst_HEADERS += compat/sys/uio.h
 
 include_HEADERS = tls.h
diff --git a/include/arpa/inet.h b/include/compat/arpa/inet.h
index 67740c6..0cea8c4 100644
--- a/include/arpa/inet.h
+++ b/include/compat/arpa/inet.h
@@ -15,5 +15,5 @@
 #endif
 
 #ifndef HAVE_INET_PTON
-int inet_pton(int af, const char * restrict src, void * restrict dst);
+int inet_pton(int af, const char * src, void * dst);
 #endif
diff --git a/include/arpa/nameser.h b/include/compat/arpa/nameser.h
index 0126a60..0126a60 100644
--- a/include/arpa/nameser.h
+++ b/include/compat/arpa/nameser.h
diff --git a/include/compat/dirent.h b/include/compat/dirent.h
new file mode 100644
index 0000000..753e4a0
--- /dev/null
+++ b/include/compat/dirent.h
@@ -0,0 +1,17 @@
+/*
+ * Public domain
+ * dirent.h compatibility shim
+ */
+
+#ifndef LIBCRYPTOCOMPAT_DIRENT_H
+#define LIBCRYPTOCOMPAT_DIRENT_H
+
+#ifdef _MSC_VER
+#include <windows.h>
+#include <dirent_msvc.h>
+#else
+#include_next <dirent.h>
+#endif
+
+#endif
+
diff --git a/include/compat/dirent_msvc.h b/include/compat/dirent_msvc.h
new file mode 100644
index 0000000..bf9cf1a
--- /dev/null
+++ b/include/compat/dirent_msvc.h
@@ -0,0 +1,748 @@
+/*
+ * dirent.h - dirent API for Microsoft Visual Studio
+ *
+ * Copyright (C) 2006-2012 Toni Ronkko
+ *
+ * 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 TONI RONKKO 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.
+ *
+ * $Id: dirent.h,v 1.20 2014/03/19 17:52:23 tronkko Exp $
+ */
+#ifndef DIRENT_MSVC_H
+#define DIRENT_MSVC_H
+
+#include <windows.h>
+
+#include <../include/stdio.h>
+#include <../include/stdarg.h>
+#include <../include/wchar.h>
+#include <../include/string.h>
+#include <../include/stdlib.h>
+#include <../include/malloc.h>
+#include <../include/sys/types.h>
+#include <sys/stat.h>
+#include <../include/errno.h>
+
+/* Indicates that d_type field is available in dirent structure */
+#define _DIRENT_HAVE_D_TYPE
+
+/* Indicates that d_namlen field is available in dirent structure */
+#define _DIRENT_HAVE_D_NAMLEN
+
+/* Entries missing from MSVC 6.0 */
+#if !defined(FILE_ATTRIBUTE_DEVICE)
+#   define FILE_ATTRIBUTE_DEVICE 0x40
+#endif
+
+/* Maximum length of file name */
+#if !defined(PATH_MAX)
+#   define PATH_MAX MAX_PATH
+#endif
+#if !defined(FILENAME_MAX)
+#   define FILENAME_MAX MAX_PATH
+#endif
+#if !defined(NAME_MAX)
+#   define NAME_MAX FILENAME_MAX
+#endif
+
+/* Return the exact length of d_namlen without zero terminator */
+#define _D_EXACT_NAMLEN(p) ((p)->d_namlen)
+
+/* Return number of bytes needed to store d_namlen */
+#define _D_ALLOC_NAMLEN(p) (PATH_MAX)
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/* Wide-character version */
+struct _wdirent {
+    long d_ino;                                 /* Always zero */
+    unsigned short d_reclen;                    /* Structure size */
+    size_t d_namlen;                            /* Length of name without \0 */
+    int d_type;                                 /* File type */
+    wchar_t d_name[PATH_MAX];                   /* File name */
+};
+typedef struct _wdirent _wdirent;
+
+struct _WDIR {
+    struct _wdirent ent;                        /* Current directory entry */
+    WIN32_FIND_DATAW data;                      /* Private file data */
+    int cached;                                 /* True if data is valid */
+    HANDLE handle;                              /* Win32 search handle */
+    wchar_t *patt;                              /* Initial directory name */
+};
+typedef struct _WDIR _WDIR;
+
+static _WDIR *_wopendir (const wchar_t *dirname);
+static struct _wdirent *_wreaddir (_WDIR *dirp);
+static int _wclosedir (_WDIR *dirp);
+static void _wrewinddir (_WDIR* dirp);
+
+
+/* For compatibility with Symbian */
+#define wdirent _wdirent
+#define WDIR _WDIR
+#define wopendir _wopendir
+#define wreaddir _wreaddir
+#define wclosedir _wclosedir
+#define wrewinddir _wrewinddir
+
+
+/* Multi-byte character versions */
+struct dirent {
+    long d_ino;                                 /* Always zero */
+    unsigned short d_reclen;                    /* Structure size */
+    size_t d_namlen;                            /* Length of name without \0 */
+    int d_type;                                 /* File type */
+    char d_name[PATH_MAX];                      /* File name */
+};
+typedef struct dirent dirent;
+
+struct DIR {
+    struct dirent ent;
+    struct _WDIR *wdirp;
+};
+typedef struct DIR DIR;
+
+static DIR *opendir (const char *dirname);
+static struct dirent *readdir (DIR *dirp);
+static int closedir (DIR *dirp);
+static void rewinddir (DIR* dirp);
+
+
+/* Internal utility functions */
+static WIN32_FIND_DATAW *dirent_first (_WDIR *dirp);
+static WIN32_FIND_DATAW *dirent_next (_WDIR *dirp);
+
+static int dirent_mbstowcs_s(
+    size_t *pReturnValue,
+    wchar_t *wcstr,
+    size_t sizeInWords,
+    const char *mbstr,
+    size_t count);
+
+static int dirent_wcstombs_s(
+    size_t *pReturnValue,
+    char *mbstr,
+    size_t sizeInBytes,
+    const wchar_t *wcstr,
+    size_t count);
+
+static void dirent_set_errno (int error);
+
+/*
+ * Open directory stream DIRNAME for read and return a pointer to the
+ * internal working area that is used to retrieve individual directory
+ * entries.
+ */
+static _WDIR*
+_wopendir(
+    const wchar_t *dirname)
+{
+    _WDIR *dirp = NULL;
+    int error;
+
+    /* Must have directory name */
+    if (dirname == NULL  ||  dirname[0] == '\0') {
+        dirent_set_errno (ENOENT);
+        return NULL;
+    }
+
+    /* Allocate new _WDIR structure */
+    dirp = (_WDIR*) malloc (sizeof (struct _WDIR));
+    if (dirp != NULL) {
+        DWORD n;
+
+        /* Reset _WDIR structure */
+        dirp->handle = INVALID_HANDLE_VALUE;
+        dirp->patt = NULL;
+        dirp->cached = 0;
+
+        /* Compute the length of full path plus zero terminator */
+        n = GetFullPathNameW (dirname, 0, NULL, NULL);
+
+        /* Allocate room for absolute directory name and search pattern */
+        dirp->patt = (wchar_t*) malloc (sizeof (wchar_t) * n + 16);
+        if (dirp->patt) {
+
+            /*
+             * Convert relative directory name to an absolute one.  This
+             * allows rewinddir() to function correctly even when current
+             * working directory is changed between opendir() and rewinddir().
+             */
+            n = GetFullPathNameW (dirname, n, dirp->patt, NULL);
+            if (n > 0) {
+                wchar_t *p;
+
+                /* Append search pattern \* to the directory name */
+                p = dirp->patt + n;
+                if (dirp->patt < p) {
+                    switch (p[-1]) {
+                    case '\\':
+                    case '/':
+                    case ':':
+                        /* Directory ends in path separator, e.g. c:\temp\ */
+                        /*NOP*/;
+                        break;
+
+                    default:
+                        /* Directory name doesn't end in path separator */
+                        *p++ = '\\';
+                    }
+                }
+                *p++ = '*';
+                *p = '\0';
+
+                /* Open directory stream and retrieve the first entry */
+                if (dirent_first (dirp)) {
+                    /* Directory stream opened successfully */
+                    error = 0;
+                } else {
+                    /* Cannot retrieve first entry */
+                    error = 1;
+                    dirent_set_errno (ENOENT);
+                }
+
+            } else {
+                /* Cannot retrieve full path name */
+                dirent_set_errno (ENOENT);
+                error = 1;
+            }
+
+        } else {
+            /* Cannot allocate memory for search pattern */
+            error = 1;
+        }
+
+    } else {
+        /* Cannot allocate _WDIR structure */
+        error = 1;
+    }
+
+    /* Clean up in case of error */
+    if (error  &&  dirp) {
+        _wclosedir (dirp);
+        dirp = NULL;
+    }
+
+    return dirp;
+}
+
+/*
+ * Read next directory entry.  The directory entry is returned in dirent
+ * structure in the d_name field.  Individual directory entries returned by
+ * this function include regular files, sub-directories, pseudo-directories
+ * "." and ".." as well as volume labels, hidden files and system files.
+ */
+static struct _wdirent*
+_wreaddir(
+    _WDIR *dirp)
+{
+    WIN32_FIND_DATAW *datap;
+    struct _wdirent *entp;
+
+    /* Read next directory entry */
+    datap = dirent_next (dirp);
+    if (datap) {
+        size_t n;
+        DWORD attr;
+
+        /* Pointer to directory entry to return */
+        entp = &dirp->ent;
+
+        /*
+         * Copy file name as wide-character string.  If the file name is too
+         * long to fit in to the destination buffer, then truncate file name
+         * to PATH_MAX characters and zero-terminate the buffer.
+         */
+        n = 0;
+        while (n + 1 < PATH_MAX  &&  datap->cFileName[n] != 0) {
+            entp->d_name[n] = datap->cFileName[n];
+            n++;
+        }
+        dirp->ent.d_name[n] = 0;
+
+        /* Length of file name excluding zero terminator */
+        entp->d_namlen = n;
+
+        /* File type */
+        attr = datap->dwFileAttributes;
+        if ((attr & FILE_ATTRIBUTE_DEVICE) != 0) {
+            entp->d_type = DT_CHR;
+        } else if ((attr & FILE_ATTRIBUTE_DIRECTORY) != 0) {
+            entp->d_type = DT_DIR;
+        } else {
+            entp->d_type = DT_REG;
+        }
+
+        /* Reset dummy fields */
+        entp->d_ino = 0;
+        entp->d_reclen = sizeof (struct _wdirent);
+
+    } else {
+
+        /* Last directory entry read */
+        entp = NULL;
+
+    }
+
+    return entp;
+}
+
+/*
+ * Close directory stream opened by opendir() function.  This invalidates the
+ * DIR structure as well as any directory entry read previously by
+ * _wreaddir().
+ */
+static int
+_wclosedir(
+    _WDIR *dirp)
+{
+    int ok;
+    if (dirp) {
+
+        /* Release search handle */
+        if (dirp->handle != INVALID_HANDLE_VALUE) {
+            FindClose (dirp->handle);
+            dirp->handle = INVALID_HANDLE_VALUE;
+        }
+
+        /* Release search pattern */
+        if (dirp->patt) {
+            free (dirp->patt);
+            dirp->patt = NULL;
+        }
+
+        /* Release directory structure */
+        free (dirp);
+        ok = /*success*/0;
+
+    } else {
+        /* Invalid directory stream */
+        dirent_set_errno (EBADF);
+        ok = /*failure*/-1;
+    }
+    return ok;
+}
+
+/*
+ * Rewind directory stream such that _wreaddir() returns the very first
+ * file name again.
+ */
+static void
+_wrewinddir(
+    _WDIR* dirp)
+{
+    if (dirp) {
+        /* Release existing search handle */
+        if (dirp->handle != INVALID_HANDLE_VALUE) {
+            FindClose (dirp->handle);
+        }
+
+        /* Open new search handle */
+        dirent_first (dirp);
+    }
+}
+
+/* Get first directory entry (internal) */
+static WIN32_FIND_DATAW*
+dirent_first(
+    _WDIR *dirp)
+{
+    WIN32_FIND_DATAW *datap;
+
+    /* Open directory and retrieve the first entry */
+    dirp->handle = FindFirstFileW (dirp->patt, &dirp->data);
+    if (dirp->handle != INVALID_HANDLE_VALUE) {
+
+        /* a directory entry is now waiting in memory */
+        datap = &dirp->data;
+        dirp->cached = 1;
+
+    } else {
+
+        /* Failed to re-open directory: no directory entry in memory */
+        dirp->cached = 0;
+        datap = NULL;
+
+    }
+    return datap;
+}
+
+/* Get next directory entry (internal) */
+static WIN32_FIND_DATAW*
+dirent_next(
+    _WDIR *dirp)
+{
+    WIN32_FIND_DATAW *p;
+
+    /* Get next directory entry */
+    if (dirp->cached != 0) {
+
+        /* A valid directory entry already in memory */
+        p = &dirp->data;
+        dirp->cached = 0;
+
+    } else if (dirp->handle != INVALID_HANDLE_VALUE) {
+
+        /* Get the next directory entry from stream */
+        if (FindNextFileW (dirp->handle, &dirp->data) != FALSE) {
+            /* Got a file */
+            p = &dirp->data;
+        } else {
+            /* The very last entry has been processed or an error occured */
+            FindClose (dirp->handle);
+            dirp->handle = INVALID_HANDLE_VALUE;
+            p = NULL;
+        }
+
+    } else {
+
+        /* End of directory stream reached */
+        p = NULL;
+
+    }
+
+    return p;
+}
+
+/*
+ * Open directory stream using plain old C-string.
+ */
+static DIR*
+opendir(
+    const char *dirname)
+{
+    struct DIR *dirp;
+    int error;
+
+    /* Must have directory name */
+    if (dirname == NULL  ||  dirname[0] == '\0') {
+        dirent_set_errno (ENOENT);
+        return NULL;
+    }
+
+    /* Allocate memory for DIR structure */
+    dirp = (DIR*) malloc (sizeof (struct DIR));
+    if (dirp) {
+        wchar_t wname[PATH_MAX];
+        size_t n;
+
+        /* Convert directory name to wide-character string */
+        error = dirent_mbstowcs_s (&n, wname, PATH_MAX, dirname, PATH_MAX);
+        if (!error) {
+
+            /* Open directory stream using wide-character name */
+            dirp->wdirp = _wopendir (wname);
+            if (dirp->wdirp) {
+                /* Directory stream opened */
+                error = 0;
+            } else {
+                /* Failed to open directory stream */
+                error = 1;
+            }
+
+        } else {
+            /*
+             * Cannot convert file name to wide-character string.  This
+             * occurs if the string contains invalid multi-byte sequences or
+             * the output buffer is too small to contain the resulting
+             * string.
+             */
+            error = 1;
+        }
+
+    } else {
+        /* Cannot allocate DIR structure */
+        error = 1;
+    }
+
+    /* Clean up in case of error */
+    if (error  &&  dirp) {
+        free (dirp);
+        dirp = NULL;
+    }
+
+    return dirp;
+}
+
+/*
+ * Read next directory entry.
+ *
+ * When working with text consoles, please note that file names returned by
+ * readdir() are represented in the default ANSI code page while any output to
+ * console is typically formatted on another code page.  Thus, non-ASCII
+ * characters in file names will not usually display correctly on console.  The
+ * problem can be fixed in two ways: (1) change the character set of console
+ * to 1252 using chcp utility and use Lucida Console font, or (2) use
+ * _cprintf function when writing to console.  The _cprinf() will re-encode
+ * ANSI strings to the console code page so many non-ASCII characters will
+ * display correcly.
+ */
+static struct dirent*
+readdir(
+    DIR *dirp)
+{
+    WIN32_FIND_DATAW *datap;
+    struct dirent *entp;
+
+    /* Read next directory entry */
+    datap = dirent_next (dirp->wdirp);
+    if (datap) {
+        size_t n;
+        int error;
+
+        /* Attempt to convert file name to multi-byte string */
+        error = dirent_wcstombs_s(
+            &n, dirp->ent.d_name, PATH_MAX, datap->cFileName, PATH_MAX);
+
+        /*
+         * If the file name cannot be represented by a multi-byte string,
+         * then attempt to use old 8+3 file name.  This allows traditional
+         * Unix-code to access some file names despite of unicode
+         * characters, although file names may seem unfamiliar to the user.
+         *
+         * Be ware that the code below cannot come up with a short file
+         * name unless the file system provides one.  At least
+         * VirtualBox shared folders fail to do this.
+         */
+        if (error  &&  datap->cAlternateFileName[0] != '\0') {
+            error = dirent_wcstombs_s(
+                &n, dirp->ent.d_name, PATH_MAX,
+                datap->cAlternateFileName, PATH_MAX);
+        }
+
+        if (!error) {
+            DWORD attr;
+
+            /* Initialize directory entry for return */
+            entp = &dirp->ent;
+
+            /* Length of file name excluding zero terminator */
+            entp->d_namlen = n - 1;
+
+            /* File attributes */
+            attr = datap->dwFileAttributes;
+            if ((attr & FILE_ATTRIBUTE_DEVICE) != 0) {
+                entp->d_type = DT_CHR;
+            } else if ((attr & FILE_ATTRIBUTE_DIRECTORY) != 0) {
+                entp->d_type = DT_DIR;
+            } else {
+                entp->d_type = DT_REG;
+            }
+
+            /* Reset dummy fields */
+            entp->d_ino = 0;
+            entp->d_reclen = sizeof (struct dirent);
+
+        } else {
+            /*
+             * Cannot convert file name to multi-byte string so construct
+             * an errornous directory entry and return that.  Note that
+             * we cannot return NULL as that would stop the processing
+             * of directory entries completely.
+             */
+            entp = &dirp->ent;
+            entp->d_name[0] = '?';
+            entp->d_name[1] = '\0';
+            entp->d_namlen = 1;
+            entp->d_type = DT_UNKNOWN;
+            entp->d_ino = 0;
+            entp->d_reclen = 0;
+        }
+
+    } else {
+        /* No more directory entries */
+        entp = NULL;
+    }
+
+    return entp;
+}
+
+/*
+ * Close directory stream.
+ */
+static int
+closedir(
+    DIR *dirp)
+{
+    int ok;
+    if (dirp) {
+
+        /* Close wide-character directory stream */
+        ok = _wclosedir (dirp->wdirp);
+        dirp->wdirp = NULL;
+
+        /* Release multi-byte character version */
+        free (dirp);
+
+    } else {
+
+        /* Invalid directory stream */
+        dirent_set_errno (EBADF);
+        ok = /*failure*/-1;
+
+    }
+    return ok;
+}
+
+/*
+ * Rewind directory stream to beginning.
+ */
+static void
+rewinddir(
+    DIR* dirp)
+{
+    /* Rewind wide-character string directory stream */
+    _wrewinddir (dirp->wdirp);
+}
+
+/* Convert multi-byte string to wide character string */
+static int
+dirent_mbstowcs_s(
+    size_t *pReturnValue,
+    wchar_t *wcstr,
+    size_t sizeInWords,
+    const char *mbstr,
+    size_t count)
+{
+    int error;
+
+#if defined(_MSC_VER)  &&  _MSC_VER >= 1400
+
+    /* Microsoft Visual Studio 2005 or later */
+    error = mbstowcs_s (pReturnValue, wcstr, sizeInWords, mbstr, count);
+
+#else
+
+    /* Older Visual Studio or non-Microsoft compiler */
+    size_t n;
+
+    /* Convert to wide-character string (or count characters) */
+    n = mbstowcs (wcstr, mbstr, sizeInWords);
+    if (!wcstr  ||  n < count) {
+
+        /* Zero-terminate output buffer */
+        if (wcstr  &&  sizeInWords) {
+            if (n >= sizeInWords) {
+                n = sizeInWords - 1;
+            }
+            wcstr[n] = 0;
+        }
+
+        /* Length of resuting multi-byte string WITH zero terminator */
+        if (pReturnValue) {
+            *pReturnValue = n + 1;
+        }
+
+        /* Success */
+        error = 0;
+
+    } else {
+
+        /* Could not convert string */
+        error = 1;
+
+    }
+
+#endif
+
+    return error;
+}
+
+/* Convert wide-character string to multi-byte string */
+static int
+dirent_wcstombs_s(
+    size_t *pReturnValue,
+    char *mbstr,
+    size_t sizeInBytes, /* max size of mbstr */
+    const wchar_t *wcstr,
+    size_t count)
+{
+    int error;
+
+#if defined(_MSC_VER)  &&  _MSC_VER >= 1400
+
+    /* Microsoft Visual Studio 2005 or later */
+    error = wcstombs_s (pReturnValue, mbstr, sizeInBytes, wcstr, count);
+
+#else
+
+    /* Older Visual Studio or non-Microsoft compiler */
+    size_t n;
+
+    /* Convert to multi-byte string (or count the number of bytes needed) */
+    n = wcstombs (mbstr, wcstr, sizeInBytes);
+    if (!mbstr  ||  n < count) {
+
+        /* Zero-terminate output buffer */
+        if (mbstr  &&  sizeInBytes) {
+            if (n >= sizeInBytes) {
+                n = sizeInBytes - 1;
+            }
+            mbstr[n] = '\0';
+        }
+
+        /* Lenght of resulting multi-bytes string WITH zero-terminator */
+        if (pReturnValue) {
+            *pReturnValue = n + 1;
+        }
+
+        /* Success */
+        error = 0;
+
+    } else {
+
+        /* Cannot convert string */
+        error = 1;
+
+    }
+
+#endif
+
+    return error;
+}
+
+/* Set errno variable */
+static void
+dirent_set_errno(
+    int error)
+{
+#if defined(_MSC_VER)  &&  _MSC_VER >= 1400
+
+    /* Microsoft Visual Studio 2005 and later */
+    _set_errno (error);
+
+#else
+
+    /* Non-Microsoft compiler or older Microsoft compiler */
+    errno = error;
+
+#endif
+}
+
+
+#ifdef __cplusplus
+}
+#endif
+#endif /*DIRENT_H*/
+
diff --git a/include/compat/err.h b/include/compat/err.h
new file mode 100644
index 0000000..af68a26
--- /dev/null
+++ b/include/compat/err.h
@@ -0,0 +1,33 @@
+/*
+ * Public domain
+ * err.h compatibility shim
+ */
+
+#ifdef HAVE_ERR_H
+
+#include_next <err.h>
+
+#else
+
+#ifndef LIBCRYPTOCOMPAT_ERR_H
+#define LIBCRYPTOCOMPAT_ERR_H
+
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+
+#define err(exitcode, format, ...) \
+  errx(exitcode, format ": %s", __VA_ARGS__, strerror(errno))
+
+#define errx(exitcode, format, ...) \
+  do { warnx(format, __VA_ARGS__); exit(exitcode); } while (0)
+
+#define warn(format, ...) \
+  warnx(format ": %s", __VA_ARGS__, strerror(errno))
+
+#define warnx(format, ...) \
+  fprintf(stderr, format "\n", __VA_ARGS__)
+
+#endif
+
+#endif
diff --git a/include/machine/endian.h b/include/compat/machine/endian.h
index 5ec39af..5ec39af 100644
--- a/include/machine/endian.h
+++ b/include/compat/machine/endian.h
diff --git a/include/netdb.h b/include/compat/netdb.h
index d36b91d..d36b91d 100644
--- a/include/netdb.h
+++ b/include/compat/netdb.h
diff --git a/include/netinet/in.h b/include/compat/netinet/in.h
index 20e57b8..20e57b8 100644
--- a/include/netinet/in.h
+++ b/include/compat/netinet/in.h
diff --git a/include/netinet/tcp.h b/include/compat/netinet/tcp.h
index c98cf74..c98cf74 100644
--- a/include/netinet/tcp.h
+++ b/include/compat/netinet/tcp.h
diff --git a/include/poll.h b/include/compat/poll.h
index c02a560..e9204cf 100644
--- a/include/poll.h
+++ b/include/compat/poll.h
@@ -14,7 +14,7 @@
 #ifndef LIBCRYPTOCOMPAT_POLL_H
 #define LIBCRYPTOCOMPAT_POLL_H
 
-#ifdef HAVE_POLL
+#ifndef _WIN32
 #include_next <poll.h>
 #else
 
diff --git a/include/stdio.h b/include/compat/stdio.h
index 76bd9da..973faa4 100644
--- a/include/stdio.h
+++ b/include/compat/stdio.h
@@ -3,11 +3,15 @@
  * stdio.h compatibility shim
  */
 
-#include_next <stdio.h>
-
 #ifndef LIBCRYPTOCOMPAT_STDIO_H
 #define LIBCRYPTOCOMPAT_STDIO_H
 
+#ifdef _MSC_VER
+#include <../include/stdio.h>
+#else
+#include_next <stdio.h>
+#endif
+
 #ifndef HAVE_ASPRINTF
 #include <stdarg.h>
 int vasprintf(char **str, const char *fmt, va_list ap);
@@ -26,6 +30,10 @@ int posix_rename(const char *oldpath, const char *newpath);
 #define rename(oldpath, newpath) posix_rename(oldpath, newpath)
 #endif
 
+#ifdef _MSC_VER
+#define snprintf _snprintf
+#endif
+
 #endif
 
 #endif
diff --git a/include/stdlib.h b/include/compat/stdlib.h
index e77f0b4..47189fd 100644
--- a/include/stdlib.h
+++ b/include/compat/stdlib.h
@@ -3,13 +3,18 @@
  * Public domain
  */
 
-#include_next <stdlib.h>
-
 #ifndef LIBCRYPTOCOMPAT_STDLIB_H
 #define LIBCRYPTOCOMPAT_STDLIB_H
 
+#ifdef _MSC_VER
+#include <../include/stdlib.h>
+#else
+#include_next <stdlib.h>
+#endif
+
+#include <sys/types.h>
 #include <sys/stat.h>
-#include <sys/time.h>
+//#include <sys/time.h>
 #include <stdint.h>
 
 #ifndef HAVE_ARC4RANDOM_BUF
diff --git a/include/string.h b/include/compat/string.h
index 05d1ffc..eabc4c4 100644
--- a/include/string.h
+++ b/include/compat/string.h
@@ -3,11 +3,15 @@
  * string.h compatibility shim
  */
 
-#include_next <string.h>
-
 #ifndef LIBCRYPTOCOMPAT_STRING_H
 #define LIBCRYPTOCOMPAT_STRING_H
 
+#ifdef _MSC_VER
+#include <../include/string.h>
+#else
+#include_next <string.h>
+#endif
+
 #include <sys/types.h>
 
 #if defined(__sun) || defined(__hpux)
@@ -17,6 +21,11 @@
 #include <strings.h>
 #endif
 
+#ifndef HAVE_STRCASECMP
+int strcasecmp(const char *s1, const char *s2);
+int strncasecmp(const char *s1, const char *s2, size_t len);
+#endif
+
 #ifndef HAVE_STRLCPY
 size_t strlcpy(char *dst, const char *src, size_t siz);
 #endif
diff --git a/include/sys/cdefs.h b/include/compat/sys/cdefs.h
index 21ef031..21ef031 100644
--- a/include/sys/cdefs.h
+++ b/include/compat/sys/cdefs.h
diff --git a/include/sys/ioctl.h b/include/compat/sys/ioctl.h
index a255506..a255506 100644
--- a/include/sys/ioctl.h
+++ b/include/compat/sys/ioctl.h
diff --git a/include/sys/mman.h b/include/compat/sys/mman.h
index d9eb6a9..d9eb6a9 100644
--- a/include/sys/mman.h
+++ b/include/compat/sys/mman.h
diff --git a/include/compat/sys/param.h b/include/compat/sys/param.h
new file mode 100644
index 0000000..70488f8
--- /dev/null
+++ b/include/compat/sys/param.h
@@ -0,0 +1,15 @@
+/*
+ * Public domain
+ * sys/param.h compatibility shim
+ */
+
+#ifndef LIBCRYPTOCOMPAT_SYS_PARAM_H
+#define LIBCRYPTOCOMPAT_SYS_PARAM_H
+
+#ifdef _MSC_VER
+#include <winsock2.h>
+#else
+#include_next <sys/param.h>
+#endif
+
+#endif
diff --git a/include/sys/select.h b/include/compat/sys/select.h
index 5ca0ea1..5ca0ea1 100644
--- a/include/sys/select.h
+++ b/include/compat/sys/select.h
diff --git a/include/sys/socket.h b/include/compat/sys/socket.h
index 17e84f1..17e84f1 100644
--- a/include/sys/socket.h
+++ b/include/compat/sys/socket.h
diff --git a/include/compat/sys/stat.h b/include/compat/sys/stat.h
new file mode 100644
index 0000000..55135d8
--- /dev/null
+++ b/include/compat/sys/stat.h
@@ -0,0 +1,95 @@
+/*
+ * Public domain
+ * sys/stat.h compatibility shim
+ */
+
+#ifndef LIBCRYPTOCOMPAT_SYS_STAT_H
+#define LIBCRYPTOCOMPAT_SYS_STAT_H
+
+#ifdef _MSC_VER
+#include <windows.h>
+#include <../include/sys/stat.h>
+
+/* File type and permission flags for stat() */
+#if !defined(S_IFMT)
+#   define S_IFMT   _S_IFMT                     /* File type mask */
+#endif
+#if !defined(S_IFDIR)
+#   define S_IFDIR  _S_IFDIR                    /* Directory */
+#endif
+#if !defined(S_IFCHR)
+#   define S_IFCHR  _S_IFCHR                    /* Character device */
+#endif
+#if !defined(S_IFFIFO)
+#   define S_IFFIFO _S_IFFIFO                   /* Pipe */
+#endif
+#if !defined(S_IFREG)
+#   define S_IFREG  _S_IFREG                    /* Regular file */
+#endif
+#if !defined(S_IREAD)
+#   define S_IREAD  _S_IREAD                    /* Read permission */
+#endif
+#if !defined(S_IWRITE)
+#   define S_IWRITE _S_IWRITE                   /* Write permission */
+#endif
+#if !defined(S_IEXEC)
+#   define S_IEXEC  _S_IEXEC                    /* Execute permission */
+#endif
+#if !defined(S_IFIFO)
+#   define S_IFIFO _S_IFIFO                     /* Pipe */
+#endif
+#if !defined(S_IFBLK)
+#   define S_IFBLK   0                          /* Block device */
+#endif
+#if !defined(S_IFLNK)
+#   define S_IFLNK   0                          /* Link */
+#endif
+#if !defined(S_IFSOCK)
+#   define S_IFSOCK  0                          /* Socket */
+#endif
+
+#if defined(_MSC_VER)
+#   define S_IRUSR  S_IREAD                     /* Read user */
+#   define S_IWUSR  S_IWRITE                    /* Write user */
+#   define S_IXUSR  0                           /* Execute user */
+#   define S_IRGRP  0                           /* Read group */
+#   define S_IWGRP  0                           /* Write group */
+#   define S_IXGRP  0                           /* Execute group */
+#   define S_IROTH  0                           /* Read others */
+#   define S_IWOTH  0                           /* Write others */
+#   define S_IXOTH  0                           /* Execute others */
+#endif
+
+/* File type flags for d_type */
+#define DT_UNKNOWN  0
+#define DT_REG      S_IFREG
+#define DT_DIR      S_IFDIR
+#define DT_FIFO     S_IFIFO
+#define DT_SOCK     S_IFSOCK
+#define DT_CHR      S_IFCHR
+#define DT_BLK      S_IFBLK
+#define DT_LNK      S_IFLNK
+
+/* Macros for converting between st_mode and d_type */
+#define IFTODT(mode) ((mode) & S_IFMT)
+#define DTTOIF(type) (type)
+
+/*
+ * File type macros.  Note that block devices, sockets and links cannot be
+ * distinguished on Windows and the macros S_ISBLK, S_ISSOCK and S_ISLNK are
+ * only defined for compatibility.  These macros should always return false
+ * on Windows.
+ */
+#define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFIFO)
+#define S_ISDIR(mode)  (((mode) & S_IFMT) == S_IFDIR)
+#define S_ISREG(mode)  (((mode) & S_IFMT) == S_IFREG)
+#define S_ISLNK(mode)  (((mode) & S_IFMT) == S_IFLNK)
+#define S_ISSOCK(mode) (((mode) & S_IFMT) == S_IFSOCK)
+#define S_ISCHR(mode)  (((mode) & S_IFMT) == S_IFCHR)
+#define S_ISBLK(mode)  (((mode) & S_IFMT) == S_IFBLK)
+
+#else
+#include_next <sys/stat.h>
+#endif
+
+#endif
diff --git a/include/compat/sys/time.h b/include/compat/sys/time.h
new file mode 100644
index 0000000..235bc6e
--- /dev/null
+++ b/include/compat/sys/time.h
@@ -0,0 +1,16 @@
+/*
+ * Public domain
+ * sys/time.h compatibility shim
+ */
+
+#ifndef LIBCRYPTOCOMPAT_SYS_TIME_H
+#define LIBCRYPTOCOMPAT_SYS_TIME_H
+
+#ifdef _MSC_VER
+#include <winsock2.h>
+int gettimeofday(struct timeval *tp, void *tzp);
+#else
+#include_next <sys/time.h>
+#endif
+
+#endif
diff --git a/include/sys/types.h b/include/compat/sys/types.h
index bceedc2..9929dd5 100644
--- a/include/sys/types.h
+++ b/include/compat/sys/types.h
@@ -3,17 +3,39 @@
  * sys/types.h compatibility shim
  */
 
-#include_next <sys/types.h>
-
 #ifndef LIBCRYPTOCOMPAT_SYS_TYPES_H
 #define LIBCRYPTOCOMPAT_SYS_TYPES_H
 
+#ifdef _MSC_VER
+#include <../include/sys/types.h>
+#else
+#include_next <sys/types.h>
+#endif
+
 #include <stdint.h>
 
 #ifdef __MINGW32__
 #include <_bsd_types.h>
 #endif
 
+#ifdef _MSC_VER
+typedef unsigned char   u_char;
+typedef unsigned short  u_short;
+typedef unsigned int    u_int;
+
+#include <basetsd.h>
+typedef SSIZE_T ssize_t;
+
+#ifndef SSIZE_MAX
+#ifdef _WIN64
+#define SSIZE_MAX _I64_MAX
+#else
+#define SSIZE_MAX INT_MAX
+#endif
+#endif
+
+#endif
+
 #if !defined(HAVE_ATTRIBUTE__BOUNDED__) && !defined(__bounded__)
 # define __bounded__(x, y, z)
 #endif
diff --git a/include/sys/uio.h b/include/compat/sys/uio.h
index b4aee9e..b4aee9e 100644
--- a/include/sys/uio.h
+++ b/include/compat/sys/uio.h
diff --git a/include/compat/time.h b/include/compat/time.h
new file mode 100644
index 0000000..d363d42
--- /dev/null
+++ b/include/compat/time.h
@@ -0,0 +1,16 @@
+/*
+ * Public domain
+ * sys/time.h compatibility shim
+ */
+
+#ifndef LIBCRYPTOCOMPAT_TIME_H
+#define LIBCRYPTOCOMPAT_TIME_H
+
+#ifdef _MSC_VER
+#include <../include/time.h>
+#define gmtime_r(tp, tm) ((gmtime_s((tm), (tp)) == 0) ? (tm) : NULL)
+#else
+#include_next <time.h>
+#endif
+
+#endif
diff --git a/include/compat/unistd.h b/include/compat/unistd.h
new file mode 100644
index 0000000..4676dc8
--- /dev/null
+++ b/include/compat/unistd.h
@@ -0,0 +1,36 @@
+/*
+ * Public domain
+ * unistd.h compatibility shim
+ */
+
+#ifndef LIBCRYPTOCOMPAT_UNISTD_H
+#define LIBCRYPTOCOMPAT_UNISTD_H
+
+#ifndef _MSC_VER
+#include_next <unistd.h>
+#else
+
+#include <stdlib.h>
+#include <io.h>
+#include <process.h>
+
+#define R_OK    4
+#define W_OK    2
+#define X_OK    0
+#define F_OK    0
+
+#define access _access
+
+static inline unsigned int sleep(unsigned int seconds)
+{
+        Sleep(seconds * 1000);
+        return seconds;
+}
+
+#endif
+
+#ifndef HAVE_GETENTROPY
+int getentropy(void *buf, size_t buflen);
+#endif
+
+#endif
diff --git a/include/win32netcompat.h b/include/compat/win32netcompat.h
index 452cfba..452cfba 100644
--- a/include/win32netcompat.h
+++ b/include/compat/win32netcompat.h
diff --git a/include/err.h b/include/err.h
deleted file mode 100644
index ec90327..0000000
--- a/include/err.h
+++ /dev/null
@@ -1,33 +0,0 @@
-/*
- * Public domain
- * err.h compatibility shim
- */
-
-#ifdef HAVE_ERR_H
-
-#include_next <err.h>
-
-#else
-
-#ifndef LIBCRYPTOCOMPAT_ERR_H
-#define LIBCRYPTOCOMPAT_ERR_H
-
-#include <errno.h>
-#include <stdio.h>
-#include <string.h>
-
-#define err(exitcode, format, args...) \
-  errx(exitcode, format ": %s", ## args, strerror(errno))
-
-#define errx(exitcode, format, args...) \
-  do { warnx(format, ## args); exit(exitcode); } while (0)
-
-#define warn(format, args...) \
-  warnx(format ": %s", ## args, strerror(errno))
-
-#define warnx(format, args...) \
-  fprintf(stderr, format "\n", ## args)
-
-#endif
-
-#endif
diff --git a/include/sys/times.h b/include/sys/times.h
deleted file mode 100644
index 5b9841b..0000000
--- a/include/sys/times.h
+++ /dev/null
@@ -1,10 +0,0 @@
-/*
- * Public domain
- * sys/times.h compatibility shim
- */
-
-#ifndef _WIN32
-#include_next <sys/times.h>
-#else
-#include <win32netcompat.h>
-#endif
diff --git a/include/syslog.h b/include/syslog.h
deleted file mode 100644
index f61e33b..0000000
--- a/include/syslog.h
+++ /dev/null
@@ -1,38 +0,0 @@
-/*
- * Public domain
- * syslog.h compatibility shim
- */
-
-#ifndef LIBCRYPTOCOMPAT_SYSLOG_H
-#define LIBCRYPTOCOMPAT_SYSLOG_H
-
-#ifndef _WIN32
-#include_next <syslog.h>
-#else
-
-/* priorities */
-#define LOG_EMERG 0
-#define LOG_ALERT 1
-#define LOG_CRIT 2
-#define LOG_ERR 3
-#define LOG_WARNING 4
-#define LOG_NOTICE 5
-#define LOG_INFO 6
-#define LOG_DEBUG 7
-
-/* facility codes */
-#define LOG_KERN (0<<3)
-#define LOG_USER (1<<3)
-#define LOG_DAEMON (3<<3)
-
-/* flags for openlog */
-#define LOG_PID 0x01
-#define LOG_CONS 0x02
-
-extern void openlog(const char *ident, int option, int facility);
-extern void syslog(int priority, const char *fmt, ...)
-        __attribute__ ((__format__ (__printf__, 2, 3)));
-extern void closelog (void);
-#endif
-
-#endif /* LIBCRYPTOCOMPAT_SYSLOG_H */
diff --git a/include/unistd.h b/include/unistd.h
deleted file mode 100644
index 9b12034..0000000
--- a/include/unistd.h
+++ /dev/null
@@ -1,15 +0,0 @@
-/*
- * Public domain
- * unistd.h compatibility shim
- */
-
-#include_next <unistd.h>
-
-#ifndef LIBCRYPTOCOMPAT_UNISTD_H
-#define LIBCRYPTOCOMPAT_UNISTD_H
-
-#ifndef HAVE_GETENTROPY
-int getentropy(void *buf, size_t buflen);
-#endif
-
-#endif