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Make the Parser independent from the global C-locale (#5028)

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* Make the Parser independent from the global C-locale

* Set a specific test locale using the environment variable FLATBUFFERS_TEST_LOCALE

* Remove redundant static qualifiers
This commit is contained in:
Vladimir Glavnyy
2018-11-17 00:24:06 +07:00
committed by Wouter van Oortmerssen
parent d6b1ce09cf
commit 5f32f94810
15 changed files with 480 additions and 277 deletions
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49
src/util.cpp
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@@ -14,6 +14,8 @@
* limitations under the License.
*/
#include <clocale>
#include "flatbuffers/util.h"
namespace flatbuffers {
@@ -58,6 +60,7 @@ bool FileExists(const char *name) {
bool DirExists(const char *name) {
// clang-format off
#ifdef _WIN32
#define flatbuffers_stat _stat
#define FLATBUFFERS_S_IFDIR _S_IFDIR
@@ -85,4 +88,50 @@ FileExistsFunction SetFileExistsFunction(
return previous_function;
}
// Locale-independent code.
#if defined(FLATBUFFERS_LOCALE_INDEPENDENT) && \
(FLATBUFFERS_LOCALE_INDEPENDENT > 0)
// clang-format off
// Allocate locale instance at startup of application.
ClassicLocale ClassicLocale::instance_;
#ifdef _MSC_VER
ClassicLocale::ClassicLocale()
: locale_(_create_locale(LC_ALL, "C")) {}
ClassicLocale::~ClassicLocale() { _free_locale(locale_); }
#else
ClassicLocale::ClassicLocale()
: locale_(newlocale(LC_ALL, "C", nullptr)) {}
ClassicLocale::~ClassicLocale() { freelocale(locale_); }
#endif
// clang-format on
#endif // !FLATBUFFERS_LOCALE_INDEPENDENT
std::string RemoveStringQuotes(const std::string &s) {
auto ch = *s.c_str();
return ((s.size() >= 2) && (ch == '\"' || ch == '\'') &&
(ch == string_back(s)))
? s.substr(1, s.length() - 2)
: s;
}
bool SetGlobalTestLocale(const char *locale_name, std::string *_value) {
const auto the_locale = setlocale(LC_ALL, locale_name);
if (!the_locale) return false;
if (_value) *_value = std::string(the_locale);
return true;
}
#ifdef _MSC_VER
# pragma warning(disable : 4996) // _CRT_SECURE_NO_WARNINGS
#endif
bool ReadEnvironmentVariable(const char *var_name, std::string *_value) {
auto env_str = std::getenv(var_name);
if (!env_str) return false;
if (_value) *_value = std::string(env_str);
return true;
}
} // namespace flatbuffers