implement the nonstandard GNU function fpurge

this is a really ugly and backwards function, but its presence will
prevent lots of broken gnulib software from trying to define its own
version of fpurge and thereby failing to build or worse.

diff --git a/include/stdio.h b/include/stdio.h
index 69178cc873c67df35d0d743cbd20523ee4fe03df..b54fe195b9a28a27c4e294f357302b872f6fecef 100644 (file)
--- a/include/stdio.h
+++ b/include/stdio.h
@@ -158,6 +158,7 @@ int asprintf(char **, const char *, ...);
 int vasprintf(char **, const char *, va_list);
 void setlinebuf(FILE *);
 void setbuffer(FILE *, char *, size_t);
+int fpurge(FILE *);
 #endif
 
 #ifdef __cplusplus

diff --git a/src/stdio/fpurge.c b/src/stdio/fpurge.c
new file mode 100644 (file)
index 0000000..a9e98e7
--- /dev/null
+++ b/src/stdio/fpurge.c
@@ -0,0 +1,11 @@
+#define _GNU_SOURCE
+#include "stdio_impl.h"
+
+int __fpurge(FILE *f)
+{
+       f->wpos = f->wbase = f->wend = 0;
+       f->rpos = f->rend = 0;
+       return 0;
+}
+
+weak_alias(__fpurge, fpurge);