1 files changed, 44 insertions, 0 deletions
diff --git a/stdio-common/Xprintf_buffer_write.c b/stdio-common/Xprintf_buffer_write.c
new file mode 100644
index 0000000000..9db2b5066a
--- /dev/null
+++ b/stdio-common/Xprintf_buffer_write.c
@@ -0,0 +1,44 @@
+/* Blob write function for struct __*printf_buffer.  Generic version.
+   Copyright (C) 2022 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C 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.
+
+   The GNU C 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 the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <printf_buffer.h>
+
+#include <assert.h>
+#include <string.h>
+
+void
+Xprintf_buffer_write (struct Xprintf_buffer *buf,
+                        const CHAR_T *s, size_t count)
+{
+  if (__glibc_unlikely (Xprintf_buffer_has_failed (buf)))
+    return;
+
+  while (count > 0)
+    {
+      if (buf->write_ptr == buf->write_end && !Xprintf_buffer_flush (buf))
+        return;
+      assert (buf->write_ptr != buf->write_end);
+      size_t to_copy = buf->write_end - buf->write_ptr;
+      if (to_copy > count)
+        to_copy = count;
+      MEMCPY (buf->write_ptr, s, to_copy);
+      buf->write_ptr += to_copy;
+      s += to_copy;
+      count -= to_copy;
+    }
+}