Imported Upstream version 1.3.9

[debian/gzip] / lib / yesno.c

diff --git a/lib/yesno.c b/lib/yesno.c
new file mode 100644 (file)
index 0000000..2400628
--- /dev/null
+++ b/lib/yesno.c
@@ -0,0 +1,64 @@
+/* yesno.c -- read a yes/no response from stdin
+
+   Copyright (C) 1990, 1998, 2001, 2003, 2004, 2005, 2006 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
+   the Free Software Foundation; either version 2, 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software Foundation,
+   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+#include <config.h>
+
+#include "yesno.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+
+#if ENABLE_NLS
+# include "getline.h"
+#endif
+
+/* Return true if we read an affirmative line from standard input.  */
+
+extern int rpmatch (char const *response);
+
+bool
+yesno (void)
+{
+  bool yes;
+
+#if ENABLE_NLS
+  char *response = NULL;
+  size_t response_size = 0;
+  ssize_t response_len = getline (&response, &response_size, stdin);
+
+  if (response_len <= 0)
+    yes = false;
+  else
+    {
+      response[response_len - 1] = '\0';
+      yes = (0 < rpmatch (response));
+    }
+
+  free (response);
+#else
+  /* Test against "^[yY]", hardcoded to avoid requiring getline,
+     regex, and rpmatch.  */
+  int c = getchar ();
+  yes = (c == 'y' || c == 'Y');
+  while (c != '\n' && c != EOF)
+    c = getchar ();
+#endif
+
+  return yes;
+}