Public bug reported:
In the en_US.UTF-8 locale, int_p_sep_by_space and int_n_sep_by_space
return 1, defined by C99ยง7.11.2.1p5 as "If the currency symbol and sign
string are adjacent, a space separates them from the value; otherwise, a
space separates the currency symbol from the value." However,
int_curr_symbol returns "USD " (note the trailing space), meaning that
C++'s money parsing functions can only parse strings like "USD 1.23"
(note 2 spaces). From some failures in libc++'s test suite, I suspect
that many other locales have the same problem, but I haven't tested them
directly. Here's a test program and its output:
$ cat test.cc
#include <iostream>
#include <locale>
#include <string>
#include <locale.h>
struct my_money_get : std::money_get<char, const char*> {
};
std::ostream& operator<<(std::ostream& out, std::ios_base::iostate state) {
if (state == std::ios_base::goodbit)
return out << "goodbit";
const char* sep = "";
if (state & std::ios_base::badbit) {
out << sep << "badbit";
sep = "|";
}
if (state & std::ios_base::failbit) {
out << sep << "failbit";
sep = "|";
}
if (state & std::ios_base::eofbit) {
out << sep << "eofbit";
sep = "|";
}
const char en_us[] = "en_US.UTF-8";
void test(const std::string& test_string) {
std::ios ios(0);
ios.imbue(std::locale(en_us));
long double result = 1.2345;
my_money_get mget;
std::ios_base::iostate err = std::ios_base::goodbit;
const char* iter = mget.get(test_string.data(),
test_string.data() + test_string.size(),
/*International=*/true,
ios, err, result);
std::cout << "'" << test_string << "' reads as: '" << result << "'\n";
std::cout << "And advances the iterator from " << (const
void*)test_string.data()
<< " to " << (const void*)iter << ".\n";
std::cout << "And leaves the stream in state " << err << ".\n";
}
int main() {
test("1.23");
test("USD 1.23");
test("USD 1.23");
setlocale(LC_ALL, en_us);
const lconv* lc = localeconv();
// In C99, the sep_by_space values mean:
// The values of p_sep_by_space, n_sep_by_space, int_p_sep_by_space,
// and int_n_sep_by_space are interpreted according to the following:
// 0 No space separates the currency symbol and value.
// 1 If the currency symbol and sign string are adjacent, a space separates
them from the
// value; otherwise, a space separates the currency symbol from the value.
// 2 If the currency symbol and sign string are adjacent, a space separates
them;
// otherwise, a space separates the sign string from the value.
std::cout << "lc->currency_symbol == '" << lc->currency_symbol << "'\n";
std::cout << "lc->p_sep_by_space == " << int(lc->p_sep_by_space) << "\n";
std::cout << "lc->n_sep_by_space == " << int(lc->n_sep_by_space) << "\n";
std::cout << "lc->int_curr_symbol == '" << lc->int_curr_symbol << "'\n";
std::cout << "lc->int_p_sep_by_space == " << int(lc->int_p_sep_by_space) <<
"\n";
std::cout << "lc->int_n_sep_by_space == " << int(lc->int_n_sep_by_space) <<
"\n";
}
$ g++ -g3 -Wall test.cc -o test && ./test
'1.23' reads as: '0'
And advances the iterator from 0x2566028 to 0x2566028.
And leaves the stream in state failbit.
'USD 1.23' reads as: '0'
And advances the iterator from 0x2566028 to 0x256602c.
And leaves the stream in state failbit.
'USD 1.23' reads as: '123'
And advances the iterator from 0x2566028 to 0x2566031.
And leaves the stream in state eofbit.
lc->currency_symbol == '$'
lc->p_sep_by_space == 0
lc->n_sep_by_space == 0
lc->int_curr_symbol == 'USD '
lc->int_p_sep_by_space == 1
lc->int_n_sep_by_space == 1
ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: locales 2.13+git20110622-2
ProcVersionSignature: Ubuntu 3.0.0-16.28-generic 3.0.17
Uname: Linux 3.0.0-16-generic x86_64
ApportVersion: 1.23-0ubuntu4
Architecture: amd64
Date: Sun Feb 19 23:30:24 2012
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
PackageArchitecture: all
ProcEnviron:
PATH=(custom, user)
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: langpack-locales
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: langpack-locales (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug oneiric running-unity
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https://bugs.launchpad.net/bugs/936773
Title:
Incorrect result from localeconv()->int_*_sep_by_space in at least
en_US.UTF-8 locale
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