summaryrefslogtreecommitdiff
path: root/lib/unistdio/ulc-fprintf.c
diff options
context:
space:
mode:
authorAndreas Rottmann <a.rottmann@gmx.at>2009-09-14 12:32:44 +0200
committerAndreas Rottmann <a.rottmann@gmx.at>2009-09-14 12:32:44 +0200
commitfa095a4504cbe668e4244547e2c141597bea4ecf (patch)
tree06135820a286ffec47804e75fbf8a147e92acd2e /lib/unistdio/ulc-fprintf.c
Imported Upstream version 0.9.1upstream/0.9.1
Diffstat (limited to 'lib/unistdio/ulc-fprintf.c')
-rw-r--r--lib/unistdio/ulc-fprintf.c74
1 files changed, 74 insertions, 0 deletions
diff --git a/lib/unistdio/ulc-fprintf.c b/lib/unistdio/ulc-fprintf.c
new file mode 100644
index 00000000..ac8ab6fe
--- /dev/null
+++ b/lib/unistdio/ulc-fprintf.c
@@ -0,0 +1,74 @@
+/* Formatted output to a stream.
+ Copyright (C) 2004, 2006-2008 Free Software Foundation, Inc.
+
+ This program 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 3 of the License, or
+ (at your option) any later version.
+
+ This program 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 <http://www.gnu.org/licenses/>. */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+/* Specification. */
+#include "unistdio.h"
+
+#include <errno.h>
+#include <limits.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "fseterr.h"
+
+/* Print formatted output to the stream FP.
+ Return string length of formatted string. On error, return a negative
+ value. */
+int
+ulc_fprintf (FILE *fp, const char *format, ...)
+{
+ char buf[2000];
+ char *output;
+ size_t len;
+ size_t lenbuf = sizeof (buf);
+ va_list args;
+
+ va_start (args, format);
+ output = ulc_vasnprintf (buf, &lenbuf, format, args);
+ len = lenbuf;
+ va_end (args);
+
+ if (!output)
+ {
+ fseterr (fp);
+ return -1;
+ }
+
+ if (fwrite (output, 1, len, fp) < len)
+ {
+ if (output != buf)
+ {
+ int saved_errno = errno;
+ free (output);
+ errno = saved_errno;
+ }
+ return -1;
+ }
+
+ if (len > INT_MAX)
+ {
+ errno = EOVERFLOW;
+ fseterr (fp);
+ return -1;
+ }
+
+ return len;
+}