Move all sources to 'src/'

[lttng-ust.git] / src / snprintf / wsetup.c

diff --git a/src/snprintf/wsetup.c b/src/snprintf/wsetup.c
new file mode 100644 (file)
index 0000000..3d2526b
--- /dev/null
+++ b/src/snprintf/wsetup.c
@@ -0,0 +1,66 @@
+/*     $OpenBSD: wsetup.c,v 1.7 2005/08/08 08:05:36 espie Exp $ */
+/*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * Copyright (C) 1990, 1993
+ *     The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Chris Torek.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+#include "local.h"
+
+/*
+ * Various output routines call wsetup to be sure it is safe to write,
+ * because either _flags does not include __SWR, or _buf is NULL.
+ * _wsetup returns 0 if OK to write, nonzero otherwise.
+ */
+int
+__swsetup(LTTNG_UST_LFILE *fp)
+{
+       /* make sure stdio is set up */
+//     if (!__sdidinit)
+//             __sinit();
+
+       /*
+        * If we are not writing, we had better be reading and writing.
+        */
+       if ((fp->_flags & __SWR) == 0) {
+               if ((fp->_flags & __SRW) == 0)
+                       return (EOF);
+               if (fp->_flags & __SRD) {
+                       /* clobber any ungetc data */
+                       if (HASUB(fp))
+                               FREEUB(fp);
+                       fp->_flags &= ~(__SRD|__SEOF);
+                       fp->_r = 0;
+                       fp->_p = fp->_bf._base;
+               }
+               fp->_flags |= __SWR;
+       }
+
+       /*
+        * Make a buffer if necessary, then set _w.
+        */
+       if (fp->_bf._base == NULL) {
+//             if ((fp->_flags & (__SSTR | __SALC)) == __SSTR)
+//                     return (EOF);
+//             __smakebuf(fp);
+               assert(0);
+       }
+       if (fp->_flags & __SLBF) {
+               /*
+                * It is line buffered, so make _lbfsize be -_bufsize
+                * for the putc() macro.  We will change _lbfsize back
+                * to 0 whenever we turn off __SWR.
+                */
+               fp->_w = 0;
+               fp->_lbfsize = -fp->_bf._size;
+       } else
+               fp->_w = fp->_flags & __SNBF ? 0 : fp->_bf._size;
+       return (0);
+}