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bpo-31900: Fix localeconv() encoding for LC_NUMERIC (#4174)

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* Add _Py_GetLocaleconvNumeric() function: decode decimal_point and
  thousands_sep fields of localeconv() from the LC_NUMERIC encoding,
  rather than decoding from the LC_CTYPE encoding.
* Modify locale.localeconv() and "n" formatter of str.format() (for
  int, float and complex to use _Py_GetLocaleconvNumeric()
  internally.
This commit is contained in:
Victor Stinner 2018-01-15 15:58:02 +01:00 • committed by GitHub
parent 7ed7aead95
commit cb064fc232
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GPG key ID: 4AEE18F83AFDEB23
8 changed files with 151 additions and 19 deletions
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77
Python/fileutils.c
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@ -1746,3 +1746,80 @@ error:
return -1;
}
#endif
int
_Py_GetLocaleconvNumeric(PyObject **decimal_point, PyObject **thousands_sep,
const char **grouping)
{
int res = -1;
struct lconv *lc = localeconv();
int change_locale = 0;
if (decimal_point != NULL &&
(strlen(lc->decimal_point) > 1 || ((unsigned char)lc->decimal_point[0]) > 127))
{
change_locale = 1;
}
if (thousands_sep != NULL &&
(strlen(lc->thousands_sep) > 1 || ((unsigned char)lc->thousands_sep[0]) > 127))
{
change_locale = 1;
}
/* Keep a copy of the LC_CTYPE locale */
char *oldloc = NULL, *loc = NULL;
if (change_locale) {
oldloc = setlocale(LC_CTYPE, NULL);
if (!oldloc) {
PyErr_SetString(PyExc_RuntimeWarning, "faild to get LC_CTYPE locale");
return -1;
}
oldloc = _PyMem_Strdup(oldloc);
if (!oldloc) {
PyErr_NoMemory();
return -1;
}
loc = setlocale(LC_NUMERIC, NULL);
if (loc != NULL && strcmp(loc, oldloc) == 0) {
loc = NULL;
}
if (loc != NULL) {
/* Only set the locale temporarilty the LC_CTYPE locale
if LC_NUMERIC locale is different than LC_CTYPE locale and
decimal_point and/or thousands_sep are non-ASCII or longer than
1 byte */
setlocale(LC_CTYPE, loc);
}
}
if (decimal_point != NULL) {
*decimal_point = PyUnicode_DecodeLocale(lc->decimal_point, NULL);
if (*decimal_point == NULL) {
goto error;
}
}
if (thousands_sep != NULL) {
*thousands_sep = PyUnicode_DecodeLocale(lc->thousands_sep, NULL);
if (*thousands_sep == NULL) {
goto error;
}
}
if (grouping != NULL) {
*grouping = lc->grouping;
}
res = 0;
error:
if (loc != NULL) {
setlocale(LC_CTYPE, oldloc);
}
PyMem_Free(oldloc);
return res;
}