1 files changed, 48 insertions, 0 deletions
diff --git a/lib/freadptr.h b/lib/freadptr.h
new file mode 100644
index 0000000..b9dac28
--- /dev/null
+++ b/lib/freadptr.h
@@ -0,0 +1,48 @@
+/* Retrieve information about a FILE stream.
+   Copyright (C) 2007-2022 Free Software Foundation, Inc.
+
+   This file 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.
+
+   This file 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 this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <stddef.h>
+#include <stdio.h>
+
+/* Assuming the stream STREAM is open for reading:
+   Return a pointer to the input buffer of STREAM, or NULL.
+   If the returned pointer is non-NULL, *SIZEP is set to the (positive) size
+   of the input buffer.
+   If the returned pointer is NULL, you should use getc (STREAM),
+   fgetc (STREAM), or fread (..., STREAM) to access the input from STREAM.
+
+   The resulting pointer becomes invalid upon any operation on STREAM.
+
+   STREAM must not be wide-character oriented.  */
+
+#if HAVE___FREADPTR /* musl libc */
+
+# include <stdio_ext.h>
+# define freadptr(stream,sizep) __freadptr (stream, sizep)
+
+#else
+
+# ifdef __cplusplus
+extern "C" {
+# endif
+
+extern const char * freadptr (FILE *stream, size_t *sizep);
+
+# ifdef __cplusplus
+}
+# endif
+
+#endif