doc: use ASCII in .texi files where UTF-8 isn't needed

[gnulib.git] / lib / freadahead.h

diff --git a/lib/freadahead.h b/lib/freadahead.h
index 430dcf8..85c16b9 100644 (file)
--- a/lib/freadahead.h
+++ b/lib/freadahead.h
@@ -1,5 +1,5 @@
 /* Retrieve information about a FILE stream.
-   Copyright (C) 2007 Free Software Foundation, Inc.
+   Copyright (C) 2007-2014 Free Software Foundation, Inc.
 
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -17,20 +17,31 @@
 #include <stddef.h>
 #include <stdio.h>
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
 /* Assuming the stream STREAM is open for reading:
    Return the number of bytes waiting in the input buffer of STREAM.
+   This includes both the bytes that have been read from the underlying input
+   source and the bytes that have been pushed back through 'ungetc'.
 
    If this number is 0 and the stream is not currently writing,
    fflush (STREAM) is known to be a no-op.
 
    STREAM must not be wide-character oriented.  */
 
-extern size_t freadahead (FILE *stream);
+#if HAVE___FREADAHEAD /* musl libc */
+
+# include <stdio_ext.h>
+# define freadahead(stream) __freadahead (stream)
+
+#else
 
-#ifdef __cplusplus
+# ifdef __cplusplus
+extern "C" {
+# endif
+
+extern size_t freadahead (FILE *stream) _GL_ATTRIBUTE_PURE;
+
+# ifdef __cplusplus
 }
+# endif
+
 #endif