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re PR libstdc++/8348 (fail() flag is set in istringstream when eof() flag is set !)

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2002-10-31  Benjamin Kosnik  <bkoz@redhat.com>

	PR libstdc++/8348
	* include/bits/istream.tcc (istream::tellg): Remove sentry bits.
	(istream::seekg): Same.
	* testsuite/27_io/istream_seeks.cc (test06): New.

From-SVN: r58703
This commit is contained in:
Benjamin Kosnik 2002-11-01 05:38:27 +00:00 committed by Benjamin Kosnik
parent 5e81d5beff
commit 04c7481ed2
3 changed files with 63 additions and 62 deletions
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7
libstdc++-v3/ChangeLog
View File

@ -1,3 +1,10 @@
2002-10-31 Benjamin Kosnik <bkoz@redhat.com>
PR libstdc++/8348
* include/bits/istream.tcc (istream::tellg): Remove sentry bits.
(istream::seekg): Same.
* testsuite/27_io/istream_seeks.cc (test06): New.
2002-10-28 Jason Thorpe <thorpej@wasabisystems.com>
* testsuite/thread/pthread5.cc: Include <unistd.h>

61
libstdc++-v3/include/bits/istream.tcc
View File

@ -935,23 +935,8 @@ namespace std
tellg(void)
{
pos_type __ret = pos_type(-1);
_M_gcount = 0;
sentry __cerb(*this, true);
if (__cerb)
{
try
{
__ret = this->rdbuf()->pubseekoff(0, ios_base::cur, ios_base::in);
}
catch(exception& __fail)
{
// 27.6.1.3 paragraph 1
// Turn this on without causing an ios::failure to be thrown.
this->setstate(ios_base::badbit);
if ((this->exceptions() & ios_base::badbit) != 0)
__throw_exception_again;
}
}
if (!this->fail())
__ret = this->rdbuf()->pubseekoff(0, ios_base::cur, ios_base::in);
return __ret;
}
@ -962,28 +947,16 @@ namespace std
seekg(pos_type __pos)
{
_M_gcount = 0;
sentry __cerb(*this, true);
if (__cerb)
if (!this->fail())
{
try
{
#ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
// 136. seekp, seekg setting wrong streams?
pos_type __err = this->rdbuf()->pubseekpos(__pos, ios_base::in);
pos_type __err = this->rdbuf()->pubseekpos(__pos, ios_base::in);
// 129. Need error indication from seekp() and seekg()
if (__err == pos_type(off_type(-1)))
this->setstate(ios_base::failbit);
if (__err == pos_type(off_type(-1)))
this->setstate(ios_base::failbit);
#endif
}
catch(exception& __fail)
{
// 27.6.1.3 paragraph 1
// Turn this on without causing an ios::failure to be thrown.
this->setstate(ios_base::badbit);
if ((this->exceptions() & ios_base::badbit) != 0)
__throw_exception_again;
}
}
return *this;
}
@ -994,29 +967,17 @@ namespace std
seekg(off_type __off, ios_base::seekdir __dir)
{
_M_gcount = 0;
sentry __cerb(*this, true);
if (__cerb)
if (!this->fail())
{
try
{
#ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
// 136. seekp, seekg setting wrong streams?
pos_type __err = this->rdbuf()->pubseekoff(__off, __dir,
ios_base::in);
pos_type __err = this->rdbuf()->pubseekoff(__off, __dir,
ios_base::in);
// 129. Need error indication from seekp() and seekg()
if (__err == pos_type(off_type(-1)))
this->setstate(ios_base::failbit);
if (__err == pos_type(off_type(-1)))
this->setstate(ios_base::failbit);
#endif
}
catch(exception& __fail)
{
// 27.6.1.3 paragraph 1
// Turn this on without causing an ios::failure to be thrown.
this->setstate(ios_base::badbit);
if ((this->exceptions() & ios_base::badbit) != 0)
__throw_exception_again;
}
}
return *this;
}

57
libstdc++-v3/testsuite/27_io/istream_seeks.cc
View File

@ -55,11 +55,6 @@ bool test01()
p4 = ifs2.tellg();
VERIFY( p3 == p4 );
#ifdef DEBUG_ASSERT
assert(test);
#endif
return test;
}
@ -237,10 +232,6 @@ void test04(void)
if01.peek();
pos02 = if01.tellg();
VERIFY( pos02 == pos01 );
#ifdef DEBUG_ASSERT
assert(test);
#endif
}
// stringstreams
@ -351,10 +342,50 @@ void test05(void)
VERIFY( state01 == state02 );
pos06 = is03.tellg();
VERIFY( pos05 == pos06 );
}
#ifdef DEBUG_ASSERT
assert(test);
#endif
// libstdc++/8348
void test06(void)
{
using namespace std;
bool test = true;
string num1("555");
// tellg
{
istringstream iss(num1);
istream::pos_type pos1 = iss.tellg();
int asNum = 0;
iss >> asNum;
VERIFY( test = iss.eof() );
VERIFY( test = !iss.fail() );
iss.tellg();
VERIFY( test = !iss.fail() );
}
// seekg
{
istringstream iss(num1);
istream::pos_type pos1 = iss.tellg();
int asNum = 0;
iss >> asNum;
VERIFY( test = iss.eof() );
VERIFY( test = !iss.fail() );
iss.seekg(0, ios_base::beg);
VERIFY( test = !iss.fail() );
}
// seekg
{
istringstream iss(num1);
istream::pos_type pos1 = iss.tellg();
int asNum = 0;
iss >> asNum;
VERIFY( test = iss.eof() );
VERIFY( test = !iss.fail() );
iss.seekg(pos1);
VERIFY( test = !iss.fail() );
}
}
int main()
@ -366,6 +397,8 @@ int main()
test04();
test05();
test06();
return 0;
}