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bpo-28604: Fix localeconv() for different LC_MONETARY (GH-10606)

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locale.localeconv() now sets temporarily the LC_CTYPE locale to the
LC_MONETARY locale if the two locales are different and monetary
strings are non-ASCII. This temporary change affects other threads.

Changes:

* locale.localeconv() can now set LC_CTYPE to LC_MONETARY to decode
  monetary fields.
* Add LocaleInfo.grouping_buffer: copy localeconv() grouping string
  since it can be replaced anytime if a different thread calls
  localeconv().
* _Py_GetLocaleconvNumeric() now requires a "struct lconv *"
  structure, so locale.localeconv() now longer calls localeconv()
  twice. Moreover, the function now requires all arguments to be
  non-NULL.
* Rename STATIC_LOCALE_INFO_INIT to LocaleInfo_STATIC_INIT.
* Move _Py_GetLocaleconvNumeric() definition from fileutils.h
  to pycore_fileutils.h. pycore_fileutils.h now includes locale.h.
* The _locale module is now built with Py_BUILD_CORE defined.
This commit is contained in:
Victor Stinner 2018-11-20 16:20:16 +01:00 committed by GitHub
parent d5d33681c1
commit 02e6bf7f20
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
8 changed files with 145 additions and 60 deletions
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6
Doc/library/locale.rst
View File

@ -148,10 +148,8 @@ The :mod:`locale` module defines the following exception and functions:
+--------------+-----------------------------------------+
The function sets temporarily the ``LC_CTYPE`` locale to the ``LC_NUMERIC``
locale to decode ``decimal_point`` and ``thousands_sep`` byte strings if
they are non-ASCII or longer than 1 byte, and the ``LC_NUMERIC`` locale is
different than the ``LC_CTYPE`` locale. This temporary change affects other
threads.
locale or the ``LC_MONETARY`` locale if locales are different and numeric or
monetary strings are non-ASCII. This temporary change affects other threads.
.. versionchanged:: 3.7
The function now sets temporarily the ``LC_CTYPE`` locale to the

5
Include/fileutils.h
View File

@ -170,11 +170,6 @@ PyAPI_FUNC(int) _Py_get_blocking(int fd);
PyAPI_FUNC(int) _Py_set_blocking(int fd, int blocking);
#endif /* !MS_WINDOWS */
PyAPI_FUNC(int) _Py_GetLocaleconvNumeric(
PyObject **decimal_point,
PyObject **thousands_sep,
const char **grouping);
#endif /* Py_LIMITED_API */
#ifdef __cplusplus

7
Include/internal/pycore_fileutils.h
View File

@ -8,6 +8,8 @@ extern "C" {
# error "Py_BUILD_CORE must be defined to include this header"
#endif
#include <locale.h> /* struct lconv */
PyAPI_FUNC(int) _Py_DecodeUTF8Ex(
const char *arg,
Py_ssize_t arglen,
@ -30,6 +32,11 @@ PyAPI_FUNC(wchar_t*) _Py_DecodeUTF8_surrogateescape(
PyAPI_FUNC(int) _Py_GetForceASCII(void);
PyAPI_FUNC(int) _Py_GetLocaleconvNumeric(
struct lconv *lc,
PyObject **decimal_point,
PyObject **thousands_sep);
#ifdef __cplusplus
}
#endif

3
Misc/NEWS.d/next/Library/2018-11-20-13-34-01.bpo-28604.iiih5h.rst Normal file
View File

@ -0,0 +1,3 @@
:func:`locale.localeconv` now sets temporarily the ``LC_CTYPE`` locale to the
``LC_MONETARY`` locale if the two locales are different and monetary strings
are non-ASCII. This temporary change affects other threads.

2
Modules/Setup
View File

@ -120,7 +120,7 @@ time -DPy_BUILD_CORE -I$(srcdir)/Include/internal timemodule.c # -lm # time oper
_thread -DPy_BUILD_CORE -I$(srcdir)/Include/internal _threadmodule.c # low-level threading interface
# access to ISO C locale support
_locale _localemodule.c # -lintl
_locale -DPy_BUILD_CORE _localemodule.c # -lintl
# Standard I/O baseline
_io -DPy_BUILD_CORE -I$(srcdir)/Include/internal -I$(srcdir)/Modules/_io _io/_iomodule.c _io/iobase.c _io/fileio.c _io/bytesio.c _io/bufferedio.c _io/textio.c _io/stringio.c

109
Modules/_localemodule.c
View File

@ -11,6 +11,7 @@ This software comes with no warranty. Use at your own risk.
#define PY_SSIZE_T_CLEAN
#include "Python.h"
#include "pycore_fileutils.h"
#include <stdio.h>
#include <locale.h>
@ -128,6 +129,82 @@ PyLocale_setlocale(PyObject* self, PyObject* args)
return result_object;
}
static int
locale_is_ascii(const char *str)
{
return (strlen(str) == 1 && ((unsigned char)str[0]) <= 127);
}
static int
locale_decode_monetary(PyObject *dict, struct lconv *lc)
{
int change_locale;
change_locale = (!locale_is_ascii(lc->int_curr_symbol)
|| !locale_is_ascii(lc->currency_symbol)
|| !locale_is_ascii(lc->mon_decimal_point)
|| !locale_is_ascii(lc->mon_thousands_sep));
/* 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,
"failed to get LC_CTYPE locale");
return -1;
}
oldloc = _PyMem_Strdup(oldloc);
if (!oldloc) {
PyErr_NoMemory();
return -1;
}
loc = setlocale(LC_MONETARY, NULL);
if (loc != NULL && strcmp(loc, oldloc) == 0) {
loc = NULL;
}
if (loc != NULL) {
/* Only set the locale temporarily the LC_CTYPE locale
to the LC_MONETARY locale if the two locales are different and
at least one string is non-ASCII. */
setlocale(LC_CTYPE, loc);
}
}
int res = -1;
#define RESULT_STRING(ATTR) \
do { \
PyObject *obj; \
obj = PyUnicode_DecodeLocale(lc->ATTR, NULL); \
if (obj == NULL) { \
goto done; \
} \
if (PyDict_SetItemString(dict, Py_STRINGIFY(ATTR), obj) < 0) { \
Py_DECREF(obj); \
goto done; \
} \
Py_DECREF(obj); \
} while (0)
RESULT_STRING(int_curr_symbol);
RESULT_STRING(currency_symbol);
RESULT_STRING(mon_decimal_point);
RESULT_STRING(mon_thousands_sep);
#undef RESULT_STRING
res = 0;
done:
if (loc != NULL) {
setlocale(LC_CTYPE, oldloc);
}
PyMem_Free(oldloc);
return res;
}
PyDoc_STRVAR(localeconv__doc__,
"() -> dict. Returns numeric and monetary locale-specific parameters.");
@ -135,7 +212,7 @@ static PyObject*
PyLocale_localeconv(PyObject* self, PyObject *Py_UNUSED(ignored))
{
PyObject* result;
struct lconv *l;
struct lconv *lc;
PyObject *x;
result = PyDict_New();
@ -144,7 +221,7 @@ PyLocale_localeconv(PyObject* self, PyObject *Py_UNUSED(ignored))
}
/* if LC_NUMERIC is different in the C library, use saved value */
l = localeconv();
lc = localeconv();
/* hopefully, the localeconv result survives the C library calls
involved herein */
@ -162,22 +239,21 @@ PyLocale_localeconv(PyObject* self, PyObject *Py_UNUSED(ignored))
#define RESULT_STRING(s)\
do { \
x = PyUnicode_DecodeLocale(l->s, NULL); \
x = PyUnicode_DecodeLocale(lc->s, NULL); \
RESULT(#s, x); \
} while (0)
#define RESULT_INT(i)\
do { \
x = PyLong_FromLong(l->i); \
x = PyLong_FromLong(lc->i); \
RESULT(#i, x); \
} while (0)
/* Monetary information */
RESULT_STRING(int_curr_symbol);
RESULT_STRING(currency_symbol);
RESULT_STRING(mon_decimal_point);
RESULT_STRING(mon_thousands_sep);
x = copy_grouping(l->mon_grouping);
/* Monetary information: LC_MONETARY encoding */
if (locale_decode_monetary(result, lc) < 0) {
goto failed;
}
x = copy_grouping(lc->mon_grouping);
RESULT("mon_grouping", x);
RESULT_STRING(positive_sign);
@ -191,12 +267,9 @@ PyLocale_localeconv(PyObject* self, PyObject *Py_UNUSED(ignored))
RESULT_INT(p_sign_posn);
RESULT_INT(n_sign_posn);
/* Numeric information */
/* Numeric information: LC_NUMERIC encoding */
PyObject *decimal_point, *thousands_sep;
const char *grouping;
if (_Py_GetLocaleconvNumeric(&decimal_point,
&thousands_sep,
&grouping) < 0) {
if (_Py_GetLocaleconvNumeric(lc, &decimal_point, &thousands_sep) < 0) {
goto failed;
}
@ -213,7 +286,7 @@ PyLocale_localeconv(PyObject* self, PyObject *Py_UNUSED(ignored))
}
Py_DECREF(thousands_sep);
x = copy_grouping(grouping);
x = copy_grouping(lc->grouping);
RESULT("grouping", x);
return result;
@ -221,6 +294,10 @@ PyLocale_localeconv(PyObject* self, PyObject *Py_UNUSED(ignored))
failed:
Py_DECREF(result);
return NULL;
#undef RESULT
#undef RESULT_STRING
#undef RESULT_INT
}
#if defined(HAVE_WCSCOLL)

41
Python/fileutils.c
View File

@ -1868,22 +1868,17 @@ error:
int
_Py_GetLocaleconvNumeric(PyObject **decimal_point, PyObject **thousands_sep,
const char **grouping)
_Py_GetLocaleconvNumeric(struct lconv *lc,
PyObject **decimal_point, PyObject **thousands_sep)
{
int res = -1;
struct lconv *lc = localeconv();
assert(decimal_point != NULL);
assert(thousands_sep != NULL);
int change_locale = 0;
if (decimal_point != NULL &&
(strlen(lc->decimal_point) > 1 || ((unsigned char)lc->decimal_point[0]) > 127))
{
if ((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))
{
if ((strlen(lc->thousands_sep) > 1 || ((unsigned char)lc->thousands_sep[0]) > 127)) {
change_locale = 1;
}
@ -1892,7 +1887,8 @@ _Py_GetLocaleconvNumeric(PyObject **decimal_point, PyObject **thousands_sep,
if (change_locale) {
oldloc = setlocale(LC_CTYPE, NULL);
if (!oldloc) {
PyErr_SetString(PyExc_RuntimeWarning, "faild to get LC_CTYPE locale");
PyErr_SetString(PyExc_RuntimeWarning,
"failed to get LC_CTYPE locale");
return -1;
}
@ -1908,7 +1904,7 @@ _Py_GetLocaleconvNumeric(PyObject **decimal_point, PyObject **thousands_sep,
}
if (loc != NULL) {
/* Only set the locale temporarilty the LC_CTYPE locale
/* Only set the locale temporarily 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 */
@ -1916,26 +1912,21 @@ _Py_GetLocaleconvNumeric(PyObject **decimal_point, PyObject **thousands_sep,
}
}
if (decimal_point != NULL) {
int res = -1;
*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;
}
goto done;
}
if (grouping != NULL) {
*grouping = lc->grouping;
*thousands_sep = PyUnicode_DecodeLocale(lc->thousands_sep, NULL);
if (*thousands_sep == NULL) {
goto done;
}
res = 0;
error:
done:
if (loc != NULL) {
setlocale(LC_CTYPE, oldloc);
}

28
Python/formatter_unicode.c
View File

@ -3,6 +3,7 @@
of int.__float__, etc., that take and return unicode objects */
#include "Python.h"
#include "pycore_fileutils.h"
#include <locale.h>
/* Raises an exception about an unknown presentation type for this
@ -396,9 +397,10 @@ typedef struct {
PyObject *decimal_point;
PyObject *thousands_sep;
const char *grouping;
char *grouping_buffer;
} LocaleInfo;
#define STATIC_LOCALE_INFO_INIT {0, 0, 0}
#define LocaleInfo_STATIC_INIT {0, 0, 0, 0}
/* describes the layout for an integer, see the comment in
calc_number_widths() for details */
@ -705,11 +707,22 @@ get_locale_info(enum LocaleType type, LocaleInfo *locale_info)
{
switch (type) {
case LT_CURRENT_LOCALE: {
if (_Py_GetLocaleconvNumeric(&locale_info->decimal_point,
&locale_info->thousands_sep,
&locale_info->grouping) < 0) {
struct lconv *lc = localeconv();
if (_Py_GetLocaleconvNumeric(lc,
&locale_info->decimal_point,
&locale_info->thousands_sep) < 0) {
return -1;
}
/* localeconv() grouping can become a dangling pointer or point
to a different string if another thread calls localeconv() during
the string formatting. Copy the string to avoid this risk. */
locale_info->grouping_buffer = _PyMem_Strdup(lc->grouping);
if (locale_info->grouping_buffer == NULL) {
PyErr_NoMemory();
return -1;
}
locale_info->grouping = locale_info->grouping_buffer;
break;
}
case LT_DEFAULT_LOCALE:
@ -743,6 +756,7 @@ free_locale_info(LocaleInfo *locale_info)
{
Py_XDECREF(locale_info->decimal_point);
Py_XDECREF(locale_info->thousands_sep);
PyMem_Free(locale_info->grouping_buffer);
}
/************************************************************************/
@ -855,7 +869,7 @@ format_long_internal(PyObject *value, const InternalFormatSpec *format,
/* Locale settings, either from the actual locale or
from a hard-code pseudo-locale */
LocaleInfo locale = STATIC_LOCALE_INFO_INIT;
LocaleInfo locale = LocaleInfo_STATIC_INIT;
/* no precision allowed on integers */
if (format->precision != -1) {
@ -1027,7 +1041,7 @@ format_float_internal(PyObject *value,
/* Locale settings, either from the actual locale or
from a hard-code pseudo-locale */
LocaleInfo locale = STATIC_LOCALE_INFO_INIT;
LocaleInfo locale = LocaleInfo_STATIC_INIT;
if (format->precision > INT_MAX) {
PyErr_SetString(PyExc_ValueError, "precision too big");
@ -1190,7 +1204,7 @@ format_complex_internal(PyObject *value,
/* Locale settings, either from the actual locale or
from a hard-code pseudo-locale */
LocaleInfo locale = STATIC_LOCALE_INFO_INIT;
LocaleInfo locale = LocaleInfo_STATIC_INIT;
if (format->precision > INT_MAX) {
PyErr_SetString(PyExc_ValueError, "precision too big");