--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/nss/lib/base/libc.c	Mon Jul 28 10:47:06 2014 +0200
@@ -0,0 +1,164 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * libc.c
+ *
+ * This file contains our wrappers/reimplementations for "standard" 
+ * libc functions.  Things like "memcpy."  We add to this as we need 
+ * it.  Oh, and let's keep it in alphabetical order, should it ever 
+ * get large.  Most string/character stuff should be in utf8.c, not 
+ * here.  This file (and maybe utf8.c) should be the only ones in
+ * NSS to include files with angle brackets.
+ */
+
+#ifndef BASE_H
+#include "base.h"
+#endif /* BASE_H */
+
+#include <string.h> /* memcpy, memset */
+
+/*
+ * nsslibc_memcpy
+ * nsslibc_memset
+ * nsslibc_offsetof
+ * nsslibc_memequal
+ */
+
+/*
+ * nsslibc_memcpy
+ *
+ * Errors:
+ *  NSS_ERROR_INVALID_POINTER
+ *
+ * Return value:
+ *  NULL on error
+ *  The destination pointer on success
+ */
+
+NSS_IMPLEMENT void *
+nsslibc_memcpy
+(
+  void *dest,
+  const void *source,
+  PRUint32 n
+)
+{
+#ifdef NSSDEBUG
+  if( ((void *)NULL == dest) || ((const void *)NULL == source) ) {
+    nss_SetError(NSS_ERROR_INVALID_POINTER);
+    return (void *)NULL;
+  }
+#endif /* NSSDEBUG */
+
+  return memcpy(dest, source, (size_t)n);
+}
+
+/*
+ * nsslibc_memset
+ *
+ * Errors:
+ *  NSS_ERROR_INVALID_POINTER
+ *
+ * Return value:
+ *  NULL on error
+ *  The destination pointer on success
+ */
+
+NSS_IMPLEMENT void *
+nsslibc_memset
+(
+  void *dest,
+  PRUint8 byte,
+  PRUint32 n
+)
+{
+#ifdef NSSDEBUG
+  if( ((void *)NULL == dest) ) {
+    nss_SetError(NSS_ERROR_INVALID_POINTER);
+    return (void *)NULL;
+  }
+#endif /* NSSDEBUG */
+
+  return memset(dest, (int)byte, (size_t)n);
+}
+
+/*
+ * nsslibc_memequal
+ *
+ * Errors:
+ *  NSS_ERROR_INVALID_POINTER
+ *
+ * Return value:
+ *  PR_TRUE if they match
+ *  PR_FALSE if they don't
+ *  PR_FALSE upon error
+ */
+
+NSS_IMPLEMENT PRBool
+nsslibc_memequal
+(
+  const void *a,
+  const void *b,
+  PRUint32 len,
+  PRStatus *statusOpt
+)
+{
+#ifdef NSSDEBUG
+  if( (((void *)NULL == a) || ((void *)NULL == b)) ) {
+    nss_SetError(NSS_ERROR_INVALID_POINTER);
+    if( (PRStatus *)NULL != statusOpt ) {
+      *statusOpt = PR_FAILURE;
+    }
+    return PR_FALSE;
+  }
+#endif /* NSSDEBUG */
+
+  if( (PRStatus *)NULL != statusOpt ) {
+    *statusOpt = PR_SUCCESS;
+  }
+
+  if( 0 == memcmp(a, b, len) ) {
+    return PR_TRUE;
+  } else {
+    return PR_FALSE;
+  }
+}
+
+/*
+ * nsslibc_memcmp
+ */
+
+NSS_IMPLEMENT PRInt32
+nsslibc_memcmp
+(
+  const void *a,
+  const void *b,
+  PRUint32 len,
+  PRStatus *statusOpt
+)
+{
+  int v;
+
+#ifdef NSSDEBUG
+  if( (((void *)NULL == a) || ((void *)NULL == b)) ) {
+    nss_SetError(NSS_ERROR_INVALID_POINTER);
+    if( (PRStatus *)NULL != statusOpt ) {
+      *statusOpt = PR_FAILURE;
+    }
+    return -2;
+  }
+#endif /* NSSDEBUG */
+
+  if( (PRStatus *)NULL != statusOpt ) {
+    *statusOpt = PR_SUCCESS;
+  }
+
+  v = memcmp(a, b, len);
+  return (PRInt32)v;
+}
+
+/*
+ * offsetof is a preprocessor definition
+ */