--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/nasmbuild/nasm-2.13rc9/nasmlib/filename.c	Thu Mar 30 20:58:41 2017 +0000
@@ -0,0 +1,69 @@
+/* ----------------------------------------------------------------------- *
+ *   
+ *   Copyright 1996-2016 The NASM Authors - All Rights Reserved
+ *   See the file AUTHORS included with the NASM distribution for
+ *   the specific copyright holders.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following
+ *   conditions are met:
+ *
+ *   * Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *   * Redistributions in binary form must reproduce the above
+ *     copyright notice, this list of conditions and the following
+ *     disclaimer in the documentation and/or other materials provided
+ *     with the distribution.
+ *     
+ *     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+ *     CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ *     INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ *     MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ *     DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ *     CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *     SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ *     NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ *     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ *     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ *     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ *     OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ *     EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * ----------------------------------------------------------------------- */
+
+/*
+ * nasmlib.c	library routines for the Netwide Assembler
+ */
+
+#include "compiler.h"
+#include "nasmlib.h"
+#include "error.h"
+
+void standard_extension(char *inname, char *outname, char *extension)
+{
+    char *p, *q;
+
+    if (*outname)               /* file name already exists, */
+        return;                 /* so do nothing */
+    q = inname;
+    p = outname;
+    while (*q)
+        *p++ = *q++;            /* copy, and find end of string */
+    *p = '\0';                  /* terminate it */
+    while (p > outname && *--p != '.') ;        /* find final period (or whatever) */
+    if (*p != '.')
+        while (*p)
+            p++;                /* go back to end if none found */
+    if (!strcmp(p, extension)) {        /* is the extension already there? */
+        if (*extension)
+            nasm_error(ERR_WARNING | ERR_NOFILE,
+		       "file name already ends in `%s': "
+		       "output will be in `nasm.out'", extension);
+        else
+            nasm_error(ERR_WARNING | ERR_NOFILE,
+		       "file name already has no extension: "
+		       "output will be in `nasm.out'");
+        strcpy(outname, "nasm.out");
+    } else
+        strcpy(p, extension);
+}