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Posted to dev@stdcxx.apache.org by "Farid Zaripov (JIRA)" <ji...@apache.org> on 2007/11/02 19:15:50 UTC
[jira] Created: (STDCXX-640) std::num_get::do_get() parses no more
than 128 characters
std::num_get::do_get() parses no more than 128 characters
---------------------------------------------------------
Key: STDCXX-640
URL: https://issues.apache.org/jira/browse/STDCXX-640
Project: C++ Standard Library
Issue Type: Bug
Components: 22. Localization
Affects Versions: 4.2, 4.1.4, 4.1.3, 4.1.2
Environment: All
Reporter: Farid Zaripov
Priority: Minor
The following program fails on assert.
#include <cassert>
#include <sstream>
#include <string>
int main ()
{
typedef std::num_get<char> NumGet;
typedef std::istreambuf_iterator<char> Iter;
std::locale loc;
for (unsigned i = 0; i < 10000; ++i) {
std::string s (i, '0');
s.push_back ('1');
std::istringstream is (s);
std::ios::iostate state = std::ios::goodbit;
long val = 0;
std::use_facet<NumGet> (loc).get (Iter (is), Iter (), is, state, val);
assert (1 == val && std::ios::eofbit == state);
}
return 0;
}
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[jira] Commented: (STDCXX-640) std::num_get::do_get() parses no
more than 128 characters
Posted by "Farid Zaripov (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/STDCXX-640?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12539657 ]
Farid Zaripov commented on STDCXX-640:
--------------------------------------
The reason is the fixed size buffer in num_get<_CharT, _InputIter>::_C_get(), _num_get.cc, line 253.
> std::num_get::do_get() parses no more than 128 characters
> ---------------------------------------------------------
>
> Key: STDCXX-640
> URL: https://issues.apache.org/jira/browse/STDCXX-640
> Project: C++ Standard Library
> Issue Type: Bug
> Components: 22. Localization
> Affects Versions: 4.1.2, 4.1.3, 4.1.4, 4.2
> Environment: All
> Reporter: Farid Zaripov
> Priority: Minor
>
> The following program fails on assert.
> #include <cassert>
> #include <sstream>
> #include <string>
> int main ()
> {
> typedef std::num_get<char> NumGet;
> typedef std::istreambuf_iterator<char> Iter;
> std::locale loc;
> for (unsigned i = 0; i < 10000; ++i) {
> std::string s (i, '0');
> s.push_back ('1');
> std::istringstream is (s);
> std::ios::iostate state = std::ios::goodbit;
> long val = 0;
> std::use_facet<NumGet> (loc).get (Iter (is), Iter (), is, state, val);
> assert (1 == val && std::ios::eofbit == state);
> }
> return 0;
> }
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[jira] Commented: (STDCXX-640) std::num_get::do_get() parses no
more than 128 characters
Posted by "Martin Sebor (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/STDCXX-640?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12539745 ]
Martin Sebor commented on STDCXX-640:
-------------------------------------
In this specific case we could just skip the leading zeros but there are other cases it wouldn't work (e.g., 1<N random digits>e-<N> should parse and evaluate to 1 for any value of N).
> std::num_get::do_get() parses no more than 128 characters
> ---------------------------------------------------------
>
> Key: STDCXX-640
> URL: https://issues.apache.org/jira/browse/STDCXX-640
> Project: C++ Standard Library
> Issue Type: Bug
> Components: 22. Localization
> Affects Versions: 4.1.2, 4.1.3, 4.1.4, 4.2
> Environment: All
> Reporter: Farid Zaripov
> Priority: Minor
>
> The following program fails on assert.
> #include <cassert>
> #include <sstream>
> #include <string>
> int main ()
> {
> typedef std::num_get<char> NumGet;
> typedef std::istreambuf_iterator<char> Iter;
> std::locale loc;
> for (unsigned i = 0; i < 10000; ++i) {
> std::string s (i, '0');
> s.push_back ('1');
> std::istringstream is (s);
> std::ios::iostate state = std::ios::goodbit;
> long val = 0;
> std::use_facet<NumGet> (loc).get (Iter (is), Iter (), is, state, val);
> assert (1 == val && std::ios::eofbit == state);
> }
> return 0;
> }
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[jira] Commented: (STDCXX-640) std::num_get::do_get() parses no
more than 128 characters
Posted by "Travis Vitek (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/STDCXX-640?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12539733 ]
Travis Vitek commented on STDCXX-640:
-------------------------------------
I don't necessarily think this is a problem with the fixed buffer size. It seems more like a problem of not skipping unnecessary zeros.
> std::num_get::do_get() parses no more than 128 characters
> ---------------------------------------------------------
>
> Key: STDCXX-640
> URL: https://issues.apache.org/jira/browse/STDCXX-640
> Project: C++ Standard Library
> Issue Type: Bug
> Components: 22. Localization
> Affects Versions: 4.1.2, 4.1.3, 4.1.4, 4.2
> Environment: All
> Reporter: Farid Zaripov
> Priority: Minor
>
> The following program fails on assert.
> #include <cassert>
> #include <sstream>
> #include <string>
> int main ()
> {
> typedef std::num_get<char> NumGet;
> typedef std::istreambuf_iterator<char> Iter;
> std::locale loc;
> for (unsigned i = 0; i < 10000; ++i) {
> std::string s (i, '0');
> s.push_back ('1');
> std::istringstream is (s);
> std::ios::iostate state = std::ios::goodbit;
> long val = 0;
> std::use_facet<NumGet> (loc).get (Iter (is), Iter (), is, state, val);
> assert (1 == val && std::ios::eofbit == state);
> }
> return 0;
> }
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