1 files changed, 98 insertions, 0 deletions
diff --git a/gnulib-tests/test-freadseek.c b/gnulib-tests/test-freadseek.c
new file mode 100644
index 0000000..69e203e
--- /dev/null
+++ b/gnulib-tests/test-freadseek.c
@@ -0,0 +1,98 @@
+/* Test of freadseek() function.
+   Copyright (C) 2007-2023 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 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2008.  */
+
+#include <config.h>
+
+#include "freadseek.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "macros.h"
+
+int
+main (int argc, char **argv)
+{
+  static const char stdin_contents[] =
+    "#!/bin/sh\n\n${CHECKER} ./test-freadseek${EXEEXT} 5 19 6 7 18 9 19 < \"$srcdir/test-freadseek.sh\" || exit 1\ncat \"$srcdir/test-freadseek.sh\" | ${CHECKER} ./test-freadseek${EXEEXT} 5 19 6 7 18 9 19 || exit 1\nexit 0\n";
+  int nbytes1 = atoi (argv[1]);
+  int nbytes2 = atoi (argv[2]);
+  int nbytes3 = atoi (argv[3]);
+  int nbytes4 = atoi (argv[4]);
+  int nbytes5 = atoi (argv[5]);
+  int nbytes6 = atoi (argv[6]);
+  int nbytes7 = atoi (argv[7]);
+  void *buf1 = malloc (nbytes1);
+  void *buf3 = malloc (nbytes3);
+  void *buf5 = malloc (nbytes5);
+  void *buf7 = malloc (nbytes7);
+  /* A private variable to keep track of the position.  */
+  size_t position = 0;
+
+  ASSERT (fread (buf1, 1, nbytes1, stdin) == nbytes1);
+  ASSERT (memcmp (buf1, stdin_contents + position, nbytes1) == 0);
+  position += nbytes1;
+
+  /* Test normal behaviour.  */
+  ASSERT (freadseek (stdin, nbytes2) == 0);
+  position += nbytes2;
+
+  ASSERT (fread (buf3, 1, nbytes3, stdin) == nbytes3);
+  ASSERT (memcmp (buf3, stdin_contents + position, nbytes3) == 0);
+  position += nbytes3;
+
+  /* Test behaviour after normal ungetc.  */
+  ungetc (fgetc (stdin), stdin);
+  ASSERT (freadseek (stdin, nbytes4) == 0);
+  position += nbytes4;
+
+  ASSERT (fread (buf5, 1, nbytes5, stdin) == nbytes5);
+  ASSERT (memcmp (buf5, stdin_contents + position, nbytes5) == 0);
+  position += nbytes5;
+
+  /* Test behaviour after arbitrary ungetc.  */
+  fgetc (stdin);
+  ungetc ('@', stdin);
+  ASSERT (freadseek (stdin, nbytes6) == 0);
+  position += nbytes6;
+
+  ASSERT (fread (buf7, 1, nbytes7, stdin) == nbytes7);
+  ASSERT (memcmp (buf7, stdin_contents + position, nbytes7) == 0);
+  position += nbytes7;
+
+  /* Test move to end of file.  */
+  ASSERT (freadseek (stdin, strlen (stdin_contents) - position) == 0);
+  ASSERT (fgetc (stdin) == EOF);
+  ASSERT (!ferror (stdin));
+
+#if !defined __MINT__ /* FreeMiNT has problems seeking past end of file */
+  /* Test move beyond end of file.  */
+  ASSERT (freadseek (stdin, 1000000) == 0);
+  ASSERT (fgetc (stdin) == EOF);
+  ASSERT (!ferror (stdin));
+#endif
+
+  free (buf7);
+  free (buf5);
+  free (buf3);
+  free (buf1);
+
+  return 0;
+}