windows: Add a common Windows header for platform specific wrappers

Include some more basic system headers in utils.h, so we can use that common
header on the different platforms.

1 files changed, 153 insertions, 0 deletions

diff --git a/src/libstrongswan/utils/windows.h b/src/libstrongswan/utils/windows.h
new file mode 100644
index 000000000..5306cbc42
--- /dev/null
+++ b/src/libstrongswan/utils/windows.h
@@ -0,0 +1,153 @@
+/*
+ * Copyright (C) 2013 Martin Willi
+ * Copyright (C) 2013 revosec AG
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program 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 General Public License
+ * for more details.
+ */
+
+/**
+ * @defgroup windows windows
+ * @{ @ingroup utils
+ */
+
+#ifndef WINDOWS_H_
+#define WINDOWS_H_
+
+#include <winsock2.h>
+#include <ws2tcpip.h>
+#include <direct.h>
+
+/* undef Windows variants evaluating values more than once */
+#undef min
+#undef max
+
+/* interface is defined as an alias to "struct" in basetypes.h, but
+ * we use it here and there as ordinary identifier. */
+#undef interface
+
+/* used by Windows API, but we have our own */
+#undef CALLBACK
+
+/* UID/GID types for capabilities, even if not supported */
+typedef u_int uid_t;
+typedef u_int gid_t;
+
+/**
+ * Replacement for random(3)
+ */
+static inline long random(void)
+{
+	return rand();
+}
+
+/**
+ * Replacement for srandom(3)
+ */
+static inline void srandom(unsigned int seed)
+{
+	srand(seed);
+}
+
+/**
+ * Provided via ws2_32
+ */
+const char *inet_ntop(int af, const void *src, char *dst, socklen_t size);
+
+/**
+ * Provided via ws2_32
+ */
+int inet_pton(int af, const char *src, void *dst);
+
+/**
+ * Provided by printf hook backend
+ */
+int asprintf(char **strp, const char *fmt, ...);
+
+/**
+ * Provided by printf hook backend
+ */
+int vasprintf(char **strp, const char *fmt, va_list ap);
+
+/**
+ * timeradd(3) from <sys/time.h>
+ */
+static inline void timeradd(struct timeval *a, struct timeval *b,
+							struct timeval *res)
+{
+	res->tv_sec = a->tv_sec + b->tv_sec;
+	res->tv_usec = a->tv_usec + b->tv_usec;
+	if (res->tv_usec >= 1000000)
+	{
+		res->tv_usec -= 1000000;
+		res->tv_sec++;
+	}
+}
+
+/**
+ * timersub(3) from <sys/time.h>
+ */
+static inline void timersub(struct timeval *a, struct timeval *b,
+							struct timeval *res)
+{
+	res->tv_sec = a->tv_sec - b->tv_sec;
+	res->tv_usec = a->tv_usec - b->tv_usec;
+	if (res->tv_usec < 0)
+	{
+		res->tv_usec += 1000000;
+		res->tv_sec--;
+	}
+}
+
+/**
+ * gmtime_r(3) from <time.h>
+ */
+static inline struct tm *gmtime_r(const time_t *timep, struct tm *result)
+{
+	if (sizeof(time_t) == 4)
+	{
+		if (_gmtime32_s(result, (__time32_t*)time) == 0)
+		{
+			return result;
+		}
+	}
+	else
+	{
+		if (_gmtime64_s(result, (__time64_t*)time) == 0)
+		{
+			return result;
+		}
+	}
+	return NULL;
+}
+
+/**
+ * localtime_r(3) from <time.h>
+ */
+static inline struct tm *localtime_r(const time_t *timep, struct tm *result)
+{
+	if (sizeof(time_t) == 4)
+	{
+		if (_localtime32_s(result, (__time32_t*)time) == 0)
+		{
+			return result;
+		}
+	}
+	else
+	{
+		if (_localtime64_s(result, (__time64_t*)time) == 0)
+		{
+			return result;
+		}
+	}
+	return NULL;
+}
+
+#endif /** WINDOWS_H_ @}*/