support: Implement support_quote_string

Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>

1 files changed, 60 insertions, 0 deletions

diff --git a/support/tst-support_quote_string.c b/support/tst-support_quote_string.c
new file mode 100644
index 0000000000..3c004759b7
--- /dev/null
+++ b/support/tst-support_quote_string.c
@@ -0,0 +1,60 @@
+/* Test the support_quote_string function.
+   Copyright (C) 2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library 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 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library 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 the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <support/check.h>
+#include <support/support.h>
+#include <string.h>
+#include <stdlib.h>
+
+static int
+do_test (void)
+{
+  char *p = support_quote_string ("");
+  TEST_COMPARE (strlen (p), 0);
+  free (p);
+  p = support_quote_string ("X");
+  TEST_COMPARE (strlen (p), 1);
+  TEST_COMPARE (p[0], 'X');
+  free (p);
+
+  /* Check escaping of backslash-escaped characters, and lack of
+     escaping for other shell meta-characters.  */
+  p = support_quote_string ("$()*?`@[]{}~\'\"X");
+  TEST_COMPARE (strcmp (p, "$()*?`@[]{}~\\'\\\"X"), 0);
+  free (p);
+
+  /* Check lack of escaping for letters and digits.  */
+#define LETTERS_AND_DIGTS                       \
+  "abcdefghijklmnopqrstuvwxyz"                  \
+  "ABCDEFGHIJKLMNOPQRSTUVWXYZ"                  \
+  "0123456789"
+  p = support_quote_string (LETTERS_AND_DIGTS "@");
+  TEST_COMPARE (strcmp (p, LETTERS_AND_DIGTS "@"), 0);
+  free (p);
+
+  /* Check escaping of control characters and other non-printable
+     characters.  */
+  p = support_quote_string ("\r\n\t\a\b\f\v\1\177\200\377@");
+  TEST_COMPARE (strcmp (p, "\\r\\n\\t\\a\\b\\f\\v\\001"
+                        "\\177\\200\\377@"), 0);
+  free (p);
+
+  return 0;
+}
+
+#include <support/test-driver.c>