1.cc: Split and fix for missing seeks between gets and puts into...

2003-06-13  Paolo Carlini  <pcarlini@unitus.it>

	* testsuite/27_io/basic_filebuf/seekoff/char/1.cc: Split and
	fix for missing seeks between gets and puts into...
	* testsuite/27_io/basic_filebuf/seekoff/char/3-io.cc: New.
	* testsuite/27_io/basic_filebuf/seekoff/char/4-io.cc: New.
	* testsuite/27_io/basic_filebuf/seekpos/char/1.cc: Same, into...
	* testsuite/27_io/basic_filebuf/seekpos/char/3-io.cc: New.
	* testsuite/27_io/basic_filebuf/seekpos/char/4-io.cc: New.
	* testsuite/27_io/basic_filebuf/sputbackc/char/1-io.cc: Fix
	for missing seeks between gets and puts.
	* testsuite/27_io/basic_filebuf/sputbackc/char/2-io.cc: Ditto.
	* testsuite/data/seekoff-1.tst: New.
	* testsuite/data/seekoff-2.tst: New.
	* testsuite/data/seekpos-1.tst: New.
	* testsuite/data/seekpos-2.tst: New.

From-SVN: r67913

libstdc++-v3/ChangeLog

+2003-06-13  Paolo Carlini  <pcarlini@unitus.it>
+
+	* testsuite/27_io/basic_filebuf/seekoff/char/1.cc: Split and
+	fix for missing seeks between gets and puts into...
+	* testsuite/27_io/basic_filebuf/seekoff/char/3-io.cc: New.
+	* testsuite/27_io/basic_filebuf/seekoff/char/4-io.cc: New.
+	* testsuite/27_io/basic_filebuf/seekpos/char/1.cc: Same, into...
+	* testsuite/27_io/basic_filebuf/seekpos/char/3-io.cc: New.
+	* testsuite/27_io/basic_filebuf/seekpos/char/4-io.cc: New.
+	* testsuite/27_io/basic_filebuf/sputbackc/char/1-io.cc: Fix
+	for missing seeks between gets and puts.
+	* testsuite/27_io/basic_filebuf/sputbackc/char/2-io.cc: Ditto.
+	* testsuite/data/seekoff-1.tst: New.
+	* testsuite/data/seekoff-2.tst: New.
+	* testsuite/data/seekpos-1.tst: New.
+	* testsuite/data/seekpos-2.tst: New.
+
 2003-06-13  Nathan C. Myers <ncm-nospam@cantrip.org>
 
 	Avoid multi-processor bus contention on increment/decrement-and-

libstdc++-v3/testsuite/27_io/basic_filebuf/seekoff/char/1.cc → libstdc++-v3/testsuite/27_io/basic_filebuf/seekoff/char/3-io.cc

@@ -22,116 +22,102 @@
 
 #include <fstream>
 #include <testsuite_hooks.h>
+#include <testsuite_io.h>
 
 // @require@ %-*.tst %-*.txt
 // @diff@ %-*.tst %*.txt
 
-// NB: This test assumes that _M_buf_size == 40, and not the usual
-// buffer_size length of BUFSIZ (8192), so that overflow/underflow can be
-// simulated a bit more readily.
-// NRB (Nota Really Bene): setting it to 40 breaks the test, as intended.
-const int buffer_size = 8192;
-//const int buffer_size = 40;
+const char name_01[] = "seekoff-1.tst";
 
-const char name_01[] = "filebuf_virtuals-1.txt"; // empty file, need to create
-
-class derived_filebuf: public std::filebuf
-{
- public:
-  void
-  set_size(int_type __size) { _M_buf_size = __size; }
-};
-
-derived_filebuf fb_03; // in | out
-
-// Initialize filebufs to be the same size regardless of platform.
-void test03()
-{
-  fb_03.set_size(buffer_size);
-}
-
-// Test overloaded virtual functions.
 void test05() 
 {
   using namespace std;
+  using namespace __gnu_cxx_test;
+
   typedef filebuf::int_type 	int_type;
-  typedef filebuf::traits_type 	traits_type;
   typedef filebuf::pos_type 	pos_type;
   typedef filebuf::off_type 	off_type;
-  typedef size_t 			size_type;
 
-  bool 					test = true;
-  filebuf 				f_tmp;
+  bool 				test = true;
   streamsize 			strmsz_1, strmsz_2;
   streamoff  			strmof_1, strmof_2;
-  int 					i = 0, j = 0, k = 0;
-
-  fb_03.open(name_01, ios_base::out | ios_base::in);
 
   int_type c1;
   int_type c2;
   int_type c3;
 
-  // seekoff
-  // pubseekoff(off_type off, ios_base::seekdir way, ios_base::openmode which)
-  // alters the stream position to off
   pos_type pt_1(off_type(-1));
   pos_type pt_2(off_type(0));
   off_type off_1 = 0;
   off_type off_2 = 0;
 
-  //IN|OUT
-  // 27filebuf-3.txt = bd23456789:;<=>?...
-  //beg
-  strmsz_1 = fb_03.in_avail(); 
-  pt_1 = fb_03.pubseekoff(2, ios_base::beg);
-  strmsz_2 = fb_03.in_avail(); 
-  off_1 = pt_1;
-  VERIFY( off_1 > 0 );
-  c1 = fb_03.snextc(); //current in pointer +1
-  VERIFY( c1 == '9' );
-  c2 = fb_03.sputc('\n');  //current in pointer +1
-  c3 = fb_03.sgetc();
-  VERIFY( c2 != c3 ); 
-  VERIFY( c3 == '9' );
-  fb_03.pubsync(); 
-  c1 = fb_03.sgetc();
-  VERIFY( c1 == c3 );
-  //cur
-  // 27filebuf-3.txt = bd2\n456789:;<=>?...
-  pt_2 = fb_03.pubseekoff(2, ios_base::cur);
-  off_2 = pt_2;
-  VERIFY( (off_2 == (off_1 + 2 + 1 + 1)) );
-  c1 = fb_03.snextc(); //current in pointer +1
-  VERIFY( c1 == '1' );
-  c2 = fb_03.sputc('x');  //test current out pointer
-  c3 = fb_03.sputc('\n');
-  c1 = fb_03.sgetc();
-  fb_03.pubsync(); 
-  c3 = fb_03.sgetc();
-  VERIFY( c1 == c3 );
-  //end
-  // 27filebuf-3.txt = "bd2\n456x\n9" 
-  pt_2 = fb_03.pubseekoff(0, ios_base::end, ios_base::in|ios_base::out);
-  off_1 = pt_2;
-  VERIFY( off_1 > off_2 ); //weak, but don't know exactly where it ends
-  c3 = fb_03.sputc('\n');
-  strmsz_1 = fb_03.sputn("because because because. . .", 28);  
-  VERIFY( strmsz_1 == 28 );
-  c1 = fb_03.sungetc();
-  // Defect?  retval of sungetc is not necessarily the character ungotten.
-  // So re-get it.
-  c1 = fb_03.sgetc();
-  fb_03.pubsync(); 
-  c3 = fb_03.sgetc();
-  VERIFY( c1 == c3 );
-  // IN
-  // OUT
+  // seekoff
+  // pubseekoff(off_type off, ios_base::seekdir way, ios_base::openmode which)
+  // alters the stream position to off
+
+  // in | out
+  {
+    constraint_filebuf fb_03;
+    fb_03.open(name_01, ios_base::out | ios_base::in);
+    VERIFY( fb_03.write_position() );
+    VERIFY( !fb_03.read_position() );
+    // 27filebuf-3.txt = bd23456789:;<=>?...
+    //beg
+    strmsz_1 = fb_03.in_avail(); 
+    pt_1 = fb_03.pubseekoff(2, ios_base::beg);
+    strmsz_2 = fb_03.in_avail(); 
+    off_1 = pt_1;
+    VERIFY( off_1 > 0 );
+    c1 = fb_03.snextc(); //current in pointer +1
+    VERIFY( c1 == '9' );
+    fb_03.pubseekoff(3, ios_base::beg);
+    c2 = fb_03.sputc('\n');  //current in pointer +1
+    fb_03.pubseekoff(4, ios_base::beg);
+    c3 = fb_03.sgetc();
+    VERIFY( c2 != c3 ); 
+    VERIFY( c3 == '9' );
+    fb_03.pubsync(); 
+    c1 = fb_03.sgetc();
+    VERIFY( c1 == c3 );
+    //cur
+    // 27filebuf-3.txt = bd2\n456789:;<=>?...
+    pt_2 = fb_03.pubseekoff(2, ios_base::cur);
+    off_2 = pt_2;
+    VERIFY( (off_2 == (off_1 + 2 + 1 + 1)) );
+    c1 = fb_03.snextc(); //current in pointer +1
+    VERIFY( c1 == '1' );
+    fb_03.pubseekoff(0, ios_base::cur);
+    c2 = fb_03.sputc('x');  //test current out pointer
+    c3 = fb_03.sputc('\n');
+    fb_03.pubseekoff(0, ios_base::cur);
+    c1 = fb_03.sgetc();
+    fb_03.pubsync(); 
+    c3 = fb_03.sgetc();
+    VERIFY( c1 == c3 );
+    //end
+    // 27filebuf-3.txt = "bd2\n456x\n9" 
+    pt_2 = fb_03.pubseekoff(0, ios_base::end);
+    off_1 = pt_2;
+    VERIFY( off_1 > off_2 ); //weak, but don't know exactly where it ends
+    c3 = fb_03.sputc('\n');
+    strmsz_1 = fb_03.sputn("because because because. . .", 28);  
+    VERIFY( strmsz_1 == 28 );
+    fb_03.pubseekoff(-1, ios_base::end);
+    fb_03.sgetc();
+    c1 = fb_03.sungetc();
+    // Defect?  retval of sungetc is not necessarily the character ungotten.
+    // So re-get it.
+    c1 = fb_03.sgetc();
+    fb_03.pubsync(); 
+    c3 = fb_03.sgetc();
+    VERIFY( c1 == c3 );
+    VERIFY( fb_03.write_position() );
+    VERIFY( fb_03.read_position() );
+  }
 }
 
 main() 
 {
-  test03();
   test05();
   return 0;
 }

libstdc++-v3/testsuite/27_io/basic_filebuf/seekoff/char/4-io.cc

+// 2001-05-21 Benjamin Kosnik  <bkoz@redhat.com>
+
+// Copyright (C) 2001, 2002, 2003 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library 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 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 General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING.  If not, write to the Free
+// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+// USA.
+
+// 27.8.1.4 Overridden virtual functions
+
+#include <fstream>
+#include <testsuite_hooks.h>
+#include <testsuite_io.h>
+
+// @require@ %-*.tst %-*.txt
+// @diff@ %-*.tst %*.txt
+
+const char name_01[] = "seekoff-2.tst";
+
+void test05() 
+{
+  using namespace std;
+  using namespace __gnu_cxx_test;
+
+  typedef filebuf::int_type 	int_type;
+  typedef filebuf::pos_type 	pos_type;
+  typedef filebuf::off_type 	off_type;
+
+  bool				test = true;
+  streamsize 			strmsz_1, strmsz_2;
+  streamoff  			strmof_1, strmof_2;
+
+  int_type c1;
+  int_type c2;
+  int_type c3;
+
+  pos_type pt_1(off_type(-1));
+  pos_type pt_2(off_type(0));
+  off_type off_1 = 0;
+  off_type off_2 = 0;
+
+  // seekoff
+  // pubseekoff(off_type off, ios_base::seekdir way, ios_base::openmode which)
+  // alters the stream position to off
+
+  // in | out
+  {
+    constraint_filebuf fb_03;
+    fb_03.pubsetbuf(0, 0);
+    fb_03.open(name_01, ios_base::out | ios_base::in);
+    VERIFY( fb_03.unbuffered() );
+    // 27filebuf-3.txt = bd23456789:;<=>?...
+    //beg
+    strmsz_1 = fb_03.in_avail(); 
+    pt_1 = fb_03.pubseekoff(2, ios_base::beg);
+    strmsz_2 = fb_03.in_avail(); 
+    off_1 = pt_1;
+    VERIFY( off_1 > 0 );
+    c1 = fb_03.snextc(); //current in pointer +1
+    VERIFY( c1 == '9' );
+    fb_03.pubseekoff(3, ios_base::beg);
+    c2 = fb_03.sputc('\n');  //current in pointer +1
+    fb_03.pubseekoff(4, ios_base::beg);
+    c3 = fb_03.sgetc();
+    VERIFY( c2 != c3 ); 
+    VERIFY( c3 == '9' );
+    fb_03.pubsync(); 
+    c1 = fb_03.sgetc();
+    VERIFY( c1 == c3 );
+    //cur
+    // 27filebuf-3.txt = bd2\n456789:;<=>?...
+    pt_2 = fb_03.pubseekoff(2, ios_base::cur);
+    off_2 = pt_2;
+    VERIFY( (off_2 == (off_1 + 2 + 1 + 1)) );
+    c1 = fb_03.snextc(); //current in pointer +1
+    VERIFY( c1 == '1' );
+    fb_03.pubseekoff(0, ios_base::cur);
+    c2 = fb_03.sputc('x');  //test current out pointer
+    c3 = fb_03.sputc('\n');
+    fb_03.pubseekoff(0, ios_base::cur);
+    c1 = fb_03.sgetc();
+    fb_03.pubsync(); 
+    c3 = fb_03.sgetc();
+    VERIFY( c1 == c3 );
+    //end
+    // 27filebuf-3.txt = "bd2\n456x\n9" 
+    pt_2 = fb_03.pubseekoff(0, ios_base::end);
+    off_1 = pt_2;
+    VERIFY( off_1 > off_2 ); //weak, but don't know exactly where it ends
+    c3 = fb_03.sputc('\n');
+    strmsz_1 = fb_03.sputn("because because because. . .", 28);  
+    VERIFY( strmsz_1 == 28 );
+    fb_03.pubseekoff(-1, ios_base::end);
+    fb_03.sgetc();
+    c1 = fb_03.sungetc();
+    // Defect?  retval of sungetc is not necessarily the character ungotten.
+    // So re-get it.
+    c1 = fb_03.sgetc();
+    fb_03.pubsync(); 
+    c3 = fb_03.sgetc();
+    VERIFY( c1 == c3 );
+    VERIFY( fb_03.unbuffered() );
+  }
+}
+
+main() 
+{
+  test05();
+  return 0;
+}

libstdc++-v3/testsuite/27_io/basic_filebuf/seekpos/char/1.cc → libstdc++-v3/testsuite/27_io/basic_filebuf/seekpos/char/3-io.cc

@@ -22,106 +22,77 @@
 
 #include <fstream>
 #include <testsuite_hooks.h>
+#include <testsuite_io.h>
 
 // @require@ %-*.tst %-*.txt
 // @diff@ %-*.tst %*.txt
 
-// NB: This test assumes that _M_buf_size == 40, and not the usual
-// buffer_size length of BUFSIZ (8192), so that overflow/underflow can be
-// simulated a bit more readily.
-// NRB (Nota Really Bene): setting it to 40 breaks the test, as intended.
-const int buffer_size = 8192;
-//const int buffer_size = 40;
+const char name_01[] = "seekpos-1.tst"; // file with data in it
 
-const char name_01[] = "filebuf_virtuals-1.txt"; // file with data in it
-
-class derived_filebuf: public std::filebuf
-{
- public:
-  void
-  set_size(int_type __size) { _M_buf_size = __size; }
-};
-
-derived_filebuf fb_03; // in | out
-
-// Initialize filebufs to be the same size regardless of platform.
-void test03()
-{
-  fb_03.set_size(buffer_size);
-}
-
-// Test overloaded virtual functions.
 void test05() 
 {
   using namespace std;
+  using namespace __gnu_cxx_test;
+
   typedef filebuf::int_type 	int_type;
-  typedef filebuf::traits_type 	traits_type;
   typedef filebuf::pos_type 	pos_type;
   typedef filebuf::off_type 	off_type;
-  typedef size_t 			size_type;
 
-  bool 					test = true;
-  filebuf 				f_tmp;
+  bool 				test = true;
   streamsize 			strmsz_1, strmsz_2;
   streamoff  			strmof_1, strmof_2;
-  int 					i = 0, j = 0, k = 0;
-
-  fb_03.open(name_01, ios_base::out | ios_base::in);
 
   int_type c1;
   int_type c2;
   int_type c3;
 
-  // seekpos
-  // pubseekpos(pos_type sp, ios_base::openmode)
-  // alters the stream position to sp
   pos_type pt_1(off_type(-1));
   pos_type pt_2(off_type(0));
+  pos_type pt_3;
   off_type off_1 = 0;
   off_type off_2 = 0;
-  //IN|OUT
-  //beg
-  pt_1 = fb_03.pubseekoff(78, ios_base::beg);
-  off_1 = pt_1;
-  VERIFY( off_1 > 0 );
-  c1 = fb_03.snextc(); 		//current in pointer +1
-  VERIFY( c1 == 't' );
-  c2 = fb_03.sputc('\n');  	//test current out pointer
-  c3 = fb_03.sgetc();
-  fb_03.pubsync(); 		//resets pointers
-  pt_2 = fb_03.pubseekpos(pt_1);
-  off_2 = pt_2;
-  VERIFY( off_1 == off_2 );
-  c3 = fb_03.snextc(); 		//current in pointer +1
-  VERIFY( c2 == c3 );
-  pt_1 = fb_03.pubseekoff(0, ios_base::end);
-  off_1 = pt_1;
-  VERIFY( off_1 > off_2 );
-  fb_03.sputn("\nof the wonderful things he does!!\nok", 37);
-  fb_03.pubsync();
-
-  // IN
-  // OUT
-
-  // VIRTUALS (indirectly tested)
-  // underflow
-  // if read position avail, returns *gptr()
 
-  // pbackfail(int_type c)
-  // put c back into input sequence
-
-  // overflow
-  // appends c to output seq
+  // seekpos
+  // pubseekpos(pos_type sp, ios_base::openmode)
+  // alters the stream position to sp
 
-  // NB Have to close these suckers. . .
-  // filebuf_type* close()
-  fb_03.close();
-  VERIFY( !fb_03.is_open() );
+  // in | out
+  {
+    constraint_filebuf fb_03;
+    fb_03.open(name_01, ios_base::out | ios_base::in);
+    VERIFY( fb_03.write_position() );
+    VERIFY( !fb_03.read_position() );
+    pt_1 = fb_03.pubseekoff(78, ios_base::beg);
+    off_1 = pt_1;
+    VERIFY( off_1 > 0 );
+    c1 = fb_03.snextc(); 		//current in pointer +1
+    VERIFY( c1 == 't' );
+    pt_3 = fb_03.pubseekoff(0, ios_base::cur);
+    fb_03.pubseekpos(pt_3);
+    c2 = fb_03.sputc('\n');  	//test current out pointer
+    pt_3 = fb_03.pubseekoff(0, ios_base::cur);
+    fb_03.pubseekpos(pt_3);
+    c3 = fb_03.sgetc();
+    fb_03.pubsync(); 		//resets pointers
+    pt_2 = fb_03.pubseekpos(pt_1);
+    off_2 = pt_2;
+    VERIFY( off_1 == off_2 );
+    c3 = fb_03.snextc(); 		//current in pointer +1
+    VERIFY( c2 == c3 );
+    pt_1 = fb_03.pubseekoff(0, ios_base::end);
+    off_1 = pt_1;
+    VERIFY( off_1 > off_2 );
+    fb_03.sputn("\nof the wonderful things he does!!\nok", 37);
+    fb_03.pubsync();
+    VERIFY( fb_03.write_position() );
+    VERIFY( !fb_03.read_position() );
+    fb_03.close();
+    VERIFY( !fb_03.is_open() );
+  }
 }
 
 main() 
 {
-  test03();
   test05();
   return 0;
 }

libstdc++-v3/testsuite/27_io/basic_filebuf/seekpos/char/4-io.cc

+// 2001-05-21 Benjamin Kosnik  <bkoz@redhat.com>
+
+// Copyright (C) 2001, 2002, 2003 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library 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 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 General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING.  If not, write to the Free
+// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+// USA.
+
+// 27.8.1.4 Overridden virtual functions
+
+#include <fstream>
+#include <testsuite_hooks.h>
+#include <testsuite_io.h>
+
+// @require@ %-*.tst %-*.txt
+// @diff@ %-*.tst %*.txt
+
+const char name_01[] = "seekpos-2.tst"; // file with data in it
+
+void test05() 
+{
+  using namespace std;
+  using namespace __gnu_cxx_test;
+
+  typedef filebuf::int_type 	int_type;
+  typedef filebuf::pos_type 	pos_type;
+  typedef filebuf::off_type 	off_type;
+
+  bool 				test = true;
+  streamsize 			strmsz_1, strmsz_2;
+  streamoff  			strmof_1, strmof_2;
+
+  int_type c1;
+  int_type c2;
+  int_type c3;
+
+  pos_type pt_1(off_type(-1));
+  pos_type pt_2(off_type(0));
+  pos_type pt_3;
+  off_type off_1 = 0;
+  off_type off_2 = 0;
+
+  // seekpos
+  // pubseekpos(pos_type sp, ios_base::openmode)
+  // alters the stream position to sp
+
+  // in | out
+  {
+    constraint_filebuf fb_03;
+    fb_03.pubsetbuf(0, 0);
+    fb_03.open(name_01, ios_base::out | ios_base::in);
+    VERIFY( fb_03.unbuffered() );
+    pt_1 = fb_03.pubseekoff(78, ios_base::beg);
+    off_1 = pt_1;
+    VERIFY( off_1 > 0 );
+    c1 = fb_03.snextc(); 		//current in pointer +1
+    VERIFY( c1 == 't' );
+    pt_3 = fb_03.pubseekoff(0, ios_base::cur);
+    fb_03.pubseekpos(pt_3);
+    c2 = fb_03.sputc('\n');  	//test current out pointer
+    pt_3 = fb_03.pubseekoff(0, ios_base::cur);
+    fb_03.pubseekpos(pt_3);
+    c3 = fb_03.sgetc();
+    fb_03.pubsync(); 		//resets pointers
+    pt_2 = fb_03.pubseekpos(pt_1);
+    off_2 = pt_2;
+    VERIFY( off_1 == off_2 );
+    c3 = fb_03.snextc(); 		//current in pointer +1
+    VERIFY( c2 == c3 );
+    pt_1 = fb_03.pubseekoff(0, ios_base::end);
+    off_1 = pt_1;
+    VERIFY( off_1 > off_2 );
+    fb_03.sputn("\nof the wonderful things he does!!\nok", 37);
+    fb_03.pubsync();
+    VERIFY( fb_03.unbuffered() );
+    fb_03.close();
+    VERIFY( !fb_03.is_open() );
+  }
+}
+
+main() 
+{
+  test05();
+  return 0;
+}

libstdc++-v3/testsuite/27_io/basic_filebuf/sputbackc/char/1-io.cc

@@ -54,6 +54,7 @@ void test01()
     VERIFY( !fb_01.read_position() );
     strmsz_1 = fb_01.sputn("racadabras", 10);//"abracadabras or what?"
     strmsz_2 = fb_01.sputn(", i wanna reach out and", 10);
+    fb_01.pubseekoff(0, std::ios_base::cur);
     c1 = fb_01.sgetc(); // -1
     c2 = fb_01.sputbackc('z');
     strmsz_2 = fb_01.in_avail();
@@ -63,9 +64,9 @@ void test01()
     VERIFY( 1 == strmsz_2 );
     //test for _in_cur == _in_beg
     // fb_01._M_out_beg = "bd23456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZracada" etc
-    fb_01.pubseekoff(10, std::ios_base::beg, 
-		   std::ios_base::in | std::ios_base::out);
+    fb_01.pubseekoff(10, std::ios_base::beg);
     fb_01.sputc('m');
+    fb_01.pubseekoff(0, std::ios_base::cur);
     strmsz_1 = fb_01.in_avail(); 
     c1 = fb_01.sgetc(); 
     fb_01.snextc();
@@ -78,9 +79,11 @@ void test01()
     VERIFY( c2 == 'z' );
     // test for replacing char with identical one
     fb_01.snextc();
+    fb_01.pubseekoff(0, std::ios_base::cur);
     fb_01.sputc('u');
     fb_01.sputc('v');
     fb_01.sputc('a');
+    fb_01.pubseekoff(0, std::ios_base::end);
     strmsz_1 = fb_01.in_avail();
     c2 = fb_01.sputbackc('a');
     strmsz_2 = fb_01.in_avail();

libstdc++-v3/testsuite/27_io/basic_filebuf/sputbackc/char/2-io.cc

@@ -54,6 +54,7 @@ void test01()
     VERIFY( fb_01.unbuffered() );
     strmsz_1 = fb_01.sputn("racadabras", 10);//"abracadabras or what?"
     strmsz_2 = fb_01.sputn(", i wanna reach out and", 10);
+    fb_01.pubseekoff(0, std::ios_base::cur);
     c1 = fb_01.sgetc(); // -1
     c2 = fb_01.sputbackc('z');
     strmsz_2 = fb_01.in_avail();
@@ -63,9 +64,9 @@ void test01()
     VERIFY( 1 == strmsz_2 );
     //test for _in_cur == _in_beg
     // fb_01._M_out_beg = "bd23456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZracada" etc
-    fb_01.pubseekoff(10, std::ios_base::beg, 
-		   std::ios_base::in | std::ios_base::out);
+    fb_01.pubseekoff(10, std::ios_base::beg);
     fb_01.sputc('m');
+    fb_01.pubseekoff(0, std::ios_base::cur);
     strmsz_1 = fb_01.in_avail(); 
     c1 = fb_01.sgetc(); 
     fb_01.snextc();
@@ -78,15 +79,17 @@ void test01()
     VERIFY( c2 == 'z' );
     // test for replacing char with identical one
     fb_01.snextc();
+    fb_01.pubseekoff(0, std::ios_base::cur);
     fb_01.sputc('u');
     fb_01.sputc('v');
     fb_01.sputc('a');
+    fb_01.pubseekoff(0, std::ios_base::end);
     strmsz_1 = fb_01.in_avail();
     c2 = fb_01.sputbackc('a');
     strmsz_2 = fb_01.in_avail();
     c3 = fb_01.sgetc();
     VERIFY( c3 == c2 );
-    VERIFY( strmsz_1 == strmsz_2 );
+    VERIFY( strmsz_1 + 1 == strmsz_2 );
     VERIFY( fb_01.unbuffered() );
   }
 }

libstdc++-v3/testsuite/data/seekoff-1.tst

+// 990117 bkoz
+// test functionality of basic_filebuf for char_type == char
+// this is a data file for 27filebuf.cc

libstdc++-v3/testsuite/data/seekoff-2.tst

+// 990117 bkoz
+// test functionality of basic_filebuf for char_type == char
+// this is a data file for 27filebuf.cc

libstdc++-v3/testsuite/data/seekpos-1.tst

+// 990117 bkoz
+// test functionality of basic_filebuf for char_type == char
+// this is a data file for 27filebuf.cc

libstdc++-v3/testsuite/data/seekpos-2.tst

+// 990117 bkoz
+// test functionality of basic_filebuf for char_type == char
+// this is a data file for 27filebuf.cc