Fixed compile warnings under windows

[oweals/gnunet.git] / src / util / crypto_crc.c

diff --git a/src/util/crypto_crc.c b/src/util/crypto_crc.c
index 35d1e257689dc6b698bdc32a32d0a9c505aa3704..8f5cfc800e44a3da7bf0e432ba62fe5782070487 100644 (file)
--- a/src/util/crypto_crc.c
+++ b/src/util/crypto_crc.c
@@ -52,10 +52,16 @@ static uLong crc_table[256];
  * with the ccorrect final value.  Thus, it is safe to call
  * even on a table that someone else is using concurrently.
  */
-void __attribute__ ((constructor)) GNUNET_CRYPTO_crc_init ()
+static void 
+crc_init ()
 {
+  static int once;
   unsigned int i, j;
   uLong h = 1;
+
+  if (once)
+    return;
+  once = 1;
   crc_table[0] = 0;
   for (i = 128; i; i >>= 1)
     {
@@ -79,6 +85,7 @@ void __attribute__ ((constructor)) GNUNET_CRYPTO_crc_init ()
 static uLong
 crc32 (uLong crc, const char *buf, size_t len)
 {
+  crc_init ();
   GNUNET_assert (crc_table[255] != 0);
   crc ^= 0xffffffff;
   while (len--)
@@ -94,8 +101,8 @@ crc32 (uLong crc, const char *buf, size_t len)
  * @param len the length of the buffer
  * @return the resulting CRC32 checksum
  */
-int
-GNUNET_CRYPTO_crc32_n (const void *buf, unsigned int len)
+int32_t
+GNUNET_CRYPTO_crc32_n (const void *buf, size_t len)
 {
   uLong crc;
   crc = crc32 (0L, Z_NULL, 0);
@@ -103,4 +110,4 @@ GNUNET_CRYPTO_crc32_n (const void *buf, unsigned int len)
   return crc;
 }
 
-/* end of crc32.c */
+/* end of crypto_crc.c */