1 files changed, 114 insertions, 0 deletions

diff --git a/src/lib/mhd_compat.c b/src/lib/mhd_compat.c
new file mode 100644
index 00000000..3abdc367
--- /dev/null
+++ b/src/lib/mhd_compat.c
@@ -0,0 +1,114 @@
+/*
+  This file is part of libmicrohttpd
+  Copyright (C) 2014-2016 Karlson2k (Evgeny Grin)
+
+  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 Street, Fifth Floor, Boston, MA  02110-1301  USA
+
+*/
+
+/**
+ * @file microhttpd/mhd_compat.c
+ * @brief  Implementation of platform missing functions.
+ * @author Karlson2k (Evgeny Grin)
+ */
+
+#include "mhd_compat.h"
+#if defined(_WIN32) && !defined(__CYGWIN__)
+#include <stdint.h>
+#include <time.h>
+#ifndef HAVE_SNPRINTF
+#include <stdio.h>
+#include <stdarg.h>
+#endif  /* HAVE_SNPRINTF */
+#endif /* _WIN32  && !__CYGWIN__ */
+
+#ifndef HAVE_CALLOC
+#include <string.h> /* for memset() */
+#endif /* ! HAVE_CALLOC */
+
+#if defined(_WIN32) && !defined(__CYGWIN__)
+
+#ifndef HAVE_SNPRINTF
+/* Emulate snprintf function on W32 */
+int
+W32_snprintf (char *__restrict s,
+              size_t n,
+              const char *__restrict format,
+              ...)
+{
+  int ret;
+  va_list args;
+
+  if ( (0 != n) &&
+       (NULL != s) )
+  {
+    va_start (args,
+              format);
+    ret = _vsnprintf (s,
+                      n,
+                      format,
+                      args);
+    va_end (args);
+    if ((int)n == ret)
+      s[n - 1] = 0;
+    if (ret >= 0)
+      return ret;
+  }
+  va_start(args,
+           format);
+  ret = _vscprintf (format,
+                    args);
+  va_end(args);
+  if ( (0 <= ret) &&
+       (0 != n) &&
+       (NULL == s) )
+    return -1;
+
+  return ret;
+}
+
+#endif  /* HAVE_SNPRINTF */
+#endif /* _WIN32  && !__CYGWIN__ */
+
+#ifndef HAVE_CALLOC
+
+#ifdef __has_builtin
+#  if __has_builtin(__builtin_mul_overflow)
+#    define MHD_HAVE_NUL_OVERFLOW 1
+#  endif
+#elif __GNUC__+0 >= 5
+#  define MHD_HAVE_NUL_OVERFLOW 1
+#endif /* __GNUC__ >= 5 */
+
+
+void *MHD_calloc_(size_t nelem, size_t elsize)
+{
+  size_t alloc_size;
+  void *ptr;
+#ifdef MHD_HAVE_NUL_OVERFLOW
+  if (__builtin_mul_overflow(nelem, elsize, &alloc_size) || 0 == alloc_size)
+    return NULL;
+#else  /* ! MHD_HAVE_NUL_OVERFLOW */
+  alloc_size = nelem * elsize;
+  if (0 == alloc_size || elsize != alloc_size / nelem)
+    return NULL;
+#endif /* ! MHD_HAVE_NUL_OVERFLOW */
+  ptr = malloc (alloc_size);
+  if (NULL == ptr)
+    return NULL;
+  memset(ptr, 0, alloc_size);
+  return ptr;
+}
+#endif /* ! HAVE_CALLOC */