--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/nspr/pr/src/io/prstdio.c	Mon Jul 28 10:47:06 2014 +0200
@@ -0,0 +1,74 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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/. */
+
+#include "primpl.h"
+
+#include <string.h>
+
+/*
+** fprintf to a PRFileDesc
+*/
+PR_IMPLEMENT(PRUint32) PR_fprintf(PRFileDesc* fd, const char *fmt, ...)
+{
+    va_list ap;
+    PRUint32 rv;
+
+    va_start(ap, fmt);
+    rv = PR_vfprintf(fd, fmt, ap);
+    va_end(ap);
+    return rv;
+}
+
+PR_IMPLEMENT(PRUint32) PR_vfprintf(PRFileDesc* fd, const char *fmt, va_list ap)
+{
+    /* XXX this could be better */
+    PRUint32 rv, len;
+    char* msg = PR_vsmprintf(fmt, ap);
+    if (NULL == msg) {
+        return -1;
+    }
+    len = strlen(msg);
+#ifdef XP_OS2
+    /*
+     * OS/2 really needs a \r for every \n.
+     * In the future we should try to use scatter-gather instead of a
+     * succession of PR_Write.
+     */
+    if (isatty(PR_FileDesc2NativeHandle(fd))) {
+        PRUint32 last = 0, idx;
+        PRInt32 tmp;
+        rv = 0;
+        for (idx = 0; idx < len+1; idx++) {
+            if ((idx - last > 0) && (('\n' == msg[idx]) || (idx == len))) {
+                tmp = PR_Write(fd, msg + last, idx - last);
+                if (tmp >= 0) {
+                    rv += tmp;
+                }
+                last = idx;
+            }
+            /*
+             * if current character is \n, and
+             * previous character isn't \r, and
+             * next character isn't \r
+             */
+            if (('\n' == msg[idx]) &&
+                ((0 == idx) || ('\r' != msg[idx-1])) &&
+                ('\r' != msg[idx+1])) {
+                /* add extra \r */
+                tmp = PR_Write(fd, "\r", 1);
+                if (tmp >= 0) {
+                    rv += tmp;
+                }
+            }
+        }
+    } else {
+        rv = PR_Write(fd, msg, len);
+    }
+#else
+    rv = PR_Write(fd, msg, len);
+#endif
+    PR_DELETE(msg);
+    return rv;
+}