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https://issues.apache.org/jira/browse/STDCXX-435?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Martin Sebor updated STDCXX-435:
--------------------------------
Description:
When compiled with gcc 4.1.1 on Linux the program below runs successfully to
completion as it should. When compiled with stdcxx the facet returns a to_next
value that is greater than the number of internal (wchar_t) characters actually
produced by the conversion and consequently the program aborts.
{code}
$ cat t.cpp && make t && ./t
#include <cassert>
#include <cwchar>
#include <locale>
int main ()
{
const std::locale utf8 ("en_US.UTF-8");
typedef std::codecvt<wchar_t, char, std::mbstate_t> UTF8_Cvt;
const UTF8_Cvt &cvt = std::use_facet<UTF8_Cvt>(utf8);
const char src[] = "abc";
wchar_t dst [2] = { L'\0' };
const char* from_next;
wchar_t* to_next;
std::mbstate_t state = std::mbstate_t ();
const std::codecvt_base::result res =
cvt.in (state,
src, src + 1, from_next,
dst, dst + 2, to_next);
assert (1 == from_next - src);
assert (1 == to_next - dst);
assert ('a' == dst [0]);
}
gcc -c -I/home/mbrown/stdcxx/include/ansi -D_RWSTDDEBUG
-I/home/mbrown/stdcxx/include -I/build/mbrown/stdcxx-gcc-4.1.1-11S/include
-I/home/mbrown/stdcxx/examples/include -pedantic -nostdinc++ -g -W -Wall
-Wcast-qual -Winline -Wshadow -Wwrite-strings -Wno-long-long -Wcast-align
t.cpp
t.cpp: In function 'int main()':
t.cpp:21: warning: unused variable 'res'
gcc t.o -o t -L/build/mbrown/stdcxx-gcc-4.1.1-11S/lib -lstd11S -lsupc++ -lm
t: t.cpp:26: int main(): Assertion `1 == from_next - src' failed.
Aborted
{code}
was:
When compiled with gcc 4.1.1 on Linux the program below runs successfully to
completion as it should. When compiled with stdcxx the facet returns a to_next
value that is greater than the number of internal (wchar_t) characters actually
produced by the conversion and consequently the program aborts.
{code}
$ cat t.cpp && make t && ./t
#include <cassert>
#include <cwchar>
#include <locale>
int main ()
{
const std::locale utf8 ("en_US.UTF-8");
typedef std::codecvt<wchar_t, char, std::mbstate_t> UTF8_Cvt;
const UTF8_Cvt &cvt = std::use_facet<UTF8_Cvt>(utf8);
const char src[] = "abc";
wchar_t dst [2] = { L'\0' };
const char* from_next;
wchar_t* to_next;
std::mbstate_t state = std::mbstate_t ();
const std::codecvt_base::result res =
cvt.in (state,
src, src + 1, from_next,
dst, dst + 2, to_next);
assert (1 == from_next - src);
assert (1 == to_next - dst);
assert ('a' == dst [0]);
}
gcc -c -I/home/mbrown/stdcxx/include/ansi -D_RWSTDDEBUG
-I/home/mbrown/stdcxx/include -I/build/mbrown/stdcxx-gcc-4.1.1-11S/include
-I/home/mbrown/stdcxx/examples/include -pedantic -nostdinc++ -g -W -Wall
-Wcast-qual -Winline -Wshadow -Wwrite-strings -Wno-long-long -Wcast-align
t.cpp
t.cpp: In function 'int main()':
t.cpp:21: warning: unused variable 'res'
gcc t.o -o t -L/build/mbrown/stdcxx-gcc-4.1.1-11S/lib -lstd11S -lsupc++ -lm
t: t.cpp:26: int main(): Assertion `1 == from_next - src' failed.
Aborted
Added an ending code tag.
> [Linux] std::codecvt_byname("*.UTF-8").in() to_next greater than expected
> -------------------------------------------------------------------------
>
> Key: STDCXX-435
> URL: https://issues.apache.org/jira/browse/STDCXX-435
> Project: C++ Standard Library
> Issue Type: Bug
> Components: 22. Localization
> Affects Versions: 4.1.3
> Environment: gcc version 4.1.1 20070105 (Red Hat 4.1.1-51)
> Reporter: Mark Brown
> Assignee: Martin Sebor
> Priority: Critical
> Fix For: 4.2.1
>
> Original Estimate: 8h
> Remaining Estimate: 8h
>
> When compiled with gcc 4.1.1 on Linux the program below runs successfully to
> completion as it should. When compiled with stdcxx the facet returns a
> to_next value that is greater than the number of internal (wchar_t)
> characters actually produced by the conversion and consequently the program
> aborts.
> {code}
> $ cat t.cpp && make t && ./t
> #include <cassert>
> #include <cwchar>
> #include <locale>
> int main ()
> {
> const std::locale utf8 ("en_US.UTF-8");
> typedef std::codecvt<wchar_t, char, std::mbstate_t> UTF8_Cvt;
> const UTF8_Cvt &cvt = std::use_facet<UTF8_Cvt>(utf8);
> const char src[] = "abc";
> wchar_t dst [2] = { L'\0' };
> const char* from_next;
> wchar_t* to_next;
> std::mbstate_t state = std::mbstate_t ();
> const std::codecvt_base::result res =
> cvt.in (state,
> src, src + 1, from_next,
> dst, dst + 2, to_next);
> assert (1 == from_next - src);
> assert (1 == to_next - dst);
> assert ('a' == dst [0]);
> }
> gcc -c -I/home/mbrown/stdcxx/include/ansi -D_RWSTDDEBUG
> -I/home/mbrown/stdcxx/include -I/build/mbrown/stdcxx-gcc-4.1.1-11S/include
> -I/home/mbrown/stdcxx/examples/include -pedantic -nostdinc++ -g -W -Wall
> -Wcast-qual -Winline -Wshadow -Wwrite-strings -Wno-long-long -Wcast-align
> t.cpp
> t.cpp: In function 'int main()':
> t.cpp:21: warning: unused variable 'res'
> gcc t.o -o t -L/build/mbrown/stdcxx-gcc-4.1.1-11S/lib -lstd11S -lsupc++ -lm
> t: t.cpp:26: int main(): Assertion `1 == from_next - src' failed.
> Aborted
> {code}
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