diff options
| -rw-r--r-- | src/qt/bitcoin.cpp | 1 | ||||
| -rwxr-xr-x | test/lint/lint-locale-dependence.sh | 33 |
2 files changed, 34 insertions, 0 deletions
diff --git a/src/qt/bitcoin.cpp b/src/qt/bitcoin.cpp index f8cdb5df23..6ae34aac72 100644 --- a/src/qt/bitcoin.cpp +++ b/src/qt/bitcoin.cpp @@ -201,6 +201,7 @@ BitcoinApplication::BitcoinApplication(interfaces::Node& node): returnValue(0), platformStyle(nullptr) { + // Qt runs setlocale(LC_ALL, "") on initialization. RegisterMetaTypes(); setQuitOnLastWindowClosed(false); } diff --git a/test/lint/lint-locale-dependence.sh b/test/lint/lint-locale-dependence.sh index e2bb403c4d..0b839824d5 100755 --- a/test/lint/lint-locale-dependence.sh +++ b/test/lint/lint-locale-dependence.sh @@ -4,6 +4,39 @@ # file COPYING or http://www.opensource.org/licenses/mit-license.php. export LC_ALL=C + +# Be aware that bitcoind and bitcoin-qt differ in terms of localization: Qt +# opts in to POSIX localization by running setlocale(LC_ALL, "") on startup, +# whereas no such call is made in bitcoind. +# +# Qt runs setlocale(LC_ALL, "") on initialization. This installs the locale +# specified by the user's LC_ALL (or LC_*) environment variable as the new +# C locale. +# +# In contrast, bitcoind does not opt in to localization -- no call to +# setlocale(LC_ALL, "") is made and the environment variables LC_* are +# thus ignored. +# +# This results in situations where bitcoind is guaranteed to be running +# with the classic locale ("C") whereas the locale of bitcoin-qt will vary +# depending on the user's environment variables. +# +# An example: Assuming the environment variable LC_ALL=de_DE then the +# call std::to_string(1.23) will return "1.230000" in bitcoind but +# "1,230000" in bitcoin-qt. +# +# From the Qt documentation: +# "On Unix/Linux Qt is configured to use the system locale settings by default. +# This can cause a conflict when using POSIX functions, for instance, when +# converting between data types such as floats and strings, since the notation +# may differ between locales. To get around this problem, call the POSIX function +# setlocale(LC_NUMERIC,"C") right after initializing QApplication, QGuiApplication +# or QCoreApplication to reset the locale that is used for number formatting to +# "C"-locale." +# +# See https://doc.qt.io/qt-5/qcoreapplication.html#locale-settings and +# https://stackoverflow.com/a/34878283 for more details. + KNOWN_VIOLATIONS=( "src/bitcoin-tx.cpp.*stoul" "src/bitcoin-tx.cpp.*trim_right" |