Add fgetwln(), a wide character version of fgetln().

1 files changed, 68 insertions, 0 deletions

diff --git a/lib/libc/stdio/fgetwln.c b/lib/libc/stdio/fgetwln.c
new file mode 100644
index 0000000..a559321
--- /dev/null
+++ b/lib/libc/stdio/fgetwln.c
@@ -0,0 +1,68 @@
+/*-
+ * Copyright (c) 2002-2004 Tim J. Robbins.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include "namespace.h"
+#include <stdio.h>
+#include <wchar.h>
+#include "un-namespace.h"
+#include "libc_private.h"
+#include "local.h"
+
+wchar_t *
+fgetwln(FILE * __restrict fp, size_t *lenp)
+{
+	wint_t wc;
+	size_t len;
+
+	FLOCKFILE(fp);
+	ORIENT(fp, 1);
+
+	len = 0;
+	while ((wc = __fgetwc(fp)) != WEOF) {
+#define	GROW	512
+		len++;
+		if (len * sizeof(wchar_t) >= fp->_lb._size &&
+		    __slbexpand(fp, (len + GROW) * sizeof(wchar_t)))
+			goto error;
+		*((wchar_t *)fp->_lb._base + len) = wc;
+		if (wc == L'\n')
+			break;
+	}
+	if (len == 0)
+		goto error;
+
+	FUNLOCKFILE(fp);
+	*lenp = len;
+	return ((wchar_t *)fp->_lb._base);
+
+error:
+	FUNLOCKFILE(fp);
+	*lenp = 0;
+	return (NULL);
+}