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#include
"Python.h"
#include
"pycore_fileutils.h"
// fileutils definitions
#include
"pycore_runtime.h"
// _PyRuntime
#include
"osdefs.h"
// SEP
#include
<locale.h>
#include
<stdlib.h>
// mbstowcs()
#ifdef
MS_WINDOWS
# include
<malloc.h>
# include
<windows.h>
# include
<winioctl.h>
// FILE_DEVICE_* constants
# include
"pycore_fileutils_windows.h"
// FILE_STAT_BASIC_INFORMATION
# if
defined(
MS_WINDOWS_GAMES
)
&&
!defined(
MS_WINDOWS_DESKTOP
)
# define
PATHCCH_ALLOW_LONG_PATHS
0x01
# else
# include
<pathcch.h>
// PathCchCombineEx
# endif
extern
int
winerror_to_errno
(
int
);
#endif
#ifdef
HAVE_LANGINFO_H
#include
<langinfo.h>
#endif
#ifdef
HAVE_SYS_IOCTL_H
#include
<sys/ioctl.h>
#endif
#ifdef
HAVE_NON_UNICODE_WCHAR_T_REPRESENTATION
#include
<iconv.h>
#endif
#ifdef
HAVE_FCNTL_H
#include
<fcntl.h>
#endif
/* HAVE_FCNTL_H */
#ifdef
O_CLOEXEC
/* Does open() support the O_CLOEXEC flag? Possible values:
-1: unknown
0: open() ignores O_CLOEXEC flag, ex: Linux kernel older than 2.6.23
1: open() supports O_CLOEXEC flag, close-on-exec is set
The flag is used by _Py_open(), _Py_open_noraise(), io.FileIO
and os.open(). */
int
_Py_open_cloexec_works
=
-1
;
#endif
// The value must be the same in unicodeobject.c.
#define
MAX_UNICODE
0x10ffff
// mbstowcs() and mbrtowc() errors
static
const
size_t
DECODE_ERROR
=
((
size_t
)
-1
);
static
const
size_t
INCOMPLETE_CHARACTER
=
(
size_t
)
-2
;
static
int
get_surrogateescape
(
_Py_error_handler
errors
,
int
*
surrogateescape
)
{
switch
(
errors
)
{
case
_Py_ERROR_STRICT
:
*
surrogateescape
=
0
;
return
0
;
case
_Py_ERROR_SURROGATEESCAPE
:
*
surrogateescape
=
1
;
return
0
;
default
:
return
-1
;
}
}
PyObject
*
_Py_device_encoding
(
int
fd
)
{
int
valid
;
Py_BEGIN_ALLOW_THREADS
_Py_BEGIN_SUPPRESS_IPH
valid
=
isatty
(
fd
);
_Py_END_SUPPRESS_IPH
Py_END_ALLOW_THREADS
if
(!
valid
)
Py_RETURN_NONE
;
#ifdef
MS_WINDOWS
#ifdef
HAVE_WINDOWS_CONSOLE_IO
UINT
cp
;
if
(
fd
==
0
)
cp
=
GetConsoleCP
();
else
if
(
fd
==
1
||
fd
==
2
)
cp
=
GetConsoleOutputCP
();
else
cp
=
0
;
/* GetConsoleCP() and GetConsoleOutputCP() return 0 if the application
has no console */
if
(
cp
==
0
) {
Py_RETURN_NONE
;
}
return
PyUnicode_FromFormat
(
"cp%u"
, (
unsigned
int
)
cp
);
#else
Py_RETURN_NONE
;
#endif
/* HAVE_WINDOWS_CONSOLE_IO */
#else
if
(
_PyRuntime
.
preconfig
.
utf8_mode
) {
_Py_DECLARE_STR
(
utf_8
,
"utf-8"
);
return
&
_Py_STR
(
utf_8
);
}
return
_Py_GetLocaleEncodingObject
();
#endif
}
static
int
is_valid_wide_char
(
wchar_t
ch
)
{
#ifdef
HAVE_NON_UNICODE_WCHAR_T_REPRESENTATION
/* Oracle Solaris doesn't use Unicode code points as wchar_t encoding
for non-Unicode locales, which makes values higher than MAX_UNICODE
possibly valid. */
return
1
;
#endif
if
(
Py_UNICODE_IS_SURROGATE
(
ch
)) {
// Reject lone surrogate characters
return
0
;
}
if
(
ch
>
MAX_UNICODE
) {
// bpo-35883: Reject characters outside [U+0000; U+10ffff] range.
// The glibc mbstowcs() UTF-8 decoder does not respect the RFC 3629,
// it creates characters outside the [U+0000; U+10ffff] range:
// https://sourceware.org/bugzilla/show_bug.cgi?id=2373
return
0
;
}
return
1
;
}
static
size_t
_Py_mbstowcs
(
wchar_t
*
dest
,
const
char
*
src
,
size_t
n
)
{
size_t
count
=
mbstowcs
(
dest
,
src
,
n
);
if
(
dest
!=
NULL
&&
count
!=
DECODE_ERROR
) {
for
(
size_t
i
=
0
;
i
<
count
;
i
++
) {
wchar_t
ch
=
dest
[
i
];
if
(!
is_valid_wide_char
(
ch
)) {
return
DECODE_ERROR
;
}
}
}
return
count
;
}
#ifdef
HAVE_MBRTOWC
static
size_t
_Py_mbrtowc
(
wchar_t
*
pwc
,
const
char
*
str
,
size_t
len
,
mbstate_t
*
pmbs
)
{
assert
(
pwc
!=
NULL
);
size_t
count
=
mbrtowc
(
pwc
,
str
,
len
,
pmbs
);
if
(
count
!=
0
&&
count
!=
DECODE_ERROR
&&
count
!=
INCOMPLETE_CHARACTER
) {
if
(!
is_valid_wide_char
(
*
pwc
)) {
return
DECODE_ERROR
;
}
}
return
count
;
}
#endif
#if
!defined(
_Py_FORCE_UTF8_FS_ENCODING
)
&&
!defined(
MS_WINDOWS
)
#define
USE_FORCE_ASCII
extern
int
_Py_normalize_encoding
(
const
char
*
,
char
*
,
size_t
);
/* Workaround FreeBSD and OpenIndiana locale encoding issue with the C locale
and POSIX locale. nl_langinfo(CODESET) announces an alias of the
ASCII encoding, whereas mbstowcs() and wcstombs() functions use the
ISO-8859-1 encoding. The problem is that os.fsencode() and os.fsdecode() use
locale.getpreferredencoding() codec. For example, if command line arguments
are decoded by mbstowcs() and encoded back by os.fsencode(), we get a
UnicodeEncodeError instead of retrieving the original byte string.
The workaround is enabled if setlocale(LC_CTYPE, NULL) returns "C",
nl_langinfo(CODESET) announces "ascii" (or an alias to ASCII), and at least
one byte in range 0x80-0xff can be decoded from the locale encoding. The
workaround is also enabled on error, for example if getting the locale
failed.
On HP-UX with the C locale or the POSIX locale, nl_langinfo(CODESET)
announces "roman8" but mbstowcs() uses Latin1 in practice. Force also the
ASCII encoding in this case.
Values of force_ascii:
1: the workaround is used: Py_EncodeLocale() uses
encode_ascii_surrogateescape() and Py_DecodeLocale() uses
decode_ascii()
0: the workaround is not used: Py_EncodeLocale() uses wcstombs() and
Py_DecodeLocale() uses mbstowcs()
-1: unknown, need to call check_force_ascii() to get the value
*/
#define
force_ascii
(_PyRuntime.fileutils.force_ascii)
static
int
check_force_ascii
(
void
)
{
char
*
loc
=
setlocale
(
LC_CTYPE
,
NULL
);
if
(
loc
==
NULL
) {
goto
error
;
}
if
(
strcmp
(
loc
,
"C"
)
!=
0
&&
strcmp
(
loc
,
"POSIX"
)
!=
0
) {
/* the LC_CTYPE locale is different than C and POSIX */
return
0
;
}
#if
defined(
HAVE_LANGINFO_H
)
&&
defined(
CODESET
)
const
char
*
codeset
=
nl_langinfo
(
CODESET
);
if
(!
codeset
||
codeset
[
0
]
==
'\0'
) {
/* CODESET is not set or empty */
goto
error
;
}
char
encoding
[
20
];
/* longest name: "iso_646.irv_1991\0" */
if
(!
_Py_normalize_encoding
(
codeset
,
encoding
,
sizeof
(
encoding
))) {
goto
error
;
}
#ifdef
__hpux
if
(
strcmp
(
encoding
,
"roman8"
)
==
0
) {
unsigned
char
ch
;
wchar_t
wch
;
size_t
res
;
ch
=
(
unsigned
char
)
0xA7
;
res
=
_Py_mbstowcs
(
&
wch
, (
char
*
)
&
ch
,
1
);
if
(
res
!=
DECODE_ERROR
&&
wch
==
L'\xA7'
) {
/* On HP-UX with C locale or the POSIX locale,
nl_langinfo(CODESET) announces "roman8", whereas mbstowcs() uses
Latin1 encoding in practice. Force ASCII in this case.
Roman8 decodes 0xA7 to U+00CF. Latin1 decodes 0xA7 to U+00A7. */
return
1
;
}
}
#else
const
char
*
ascii_aliases
[]
=
{
"ascii"
,
/* Aliases from Lib/encodings/aliases.py */
"646"
,
"ansi_x3.4_1968"
,
"ansi_x3.4_1986"
,
"ansi_x3_4_1968"
,
"cp367"
,
"csascii"
,
"ibm367"
,
"iso646_us"
,
"iso_646.irv_1991"
,
"iso_ir_6"
,
"us"
,
"us_ascii"
,
NULL
};
int
is_ascii
=
0
;
for
(
const
char
*
*
alias
=
ascii_aliases
;
*
alias
!=
NULL
;
alias
++
) {
if
(
strcmp
(
encoding
,
*
alias
)
==
0
) {
is_ascii
=
1
;
break
;
}
}
if
(!
is_ascii
) {
/* nl_langinfo(CODESET) is not "ascii" or an alias of ASCII */
return
0
;
}
for
(
unsigned
int
i
=
0x80
;
i
<=
0xff
;
i
++
) {
char
ch
[
1
];
wchar_t
wch
[
1
];
size_t
res
;
unsigned
uch
=
(
unsigned
char
)
i
;
ch
[
0
]
=
(
char
)
uch
;
res
=
_Py_mbstowcs
(
wch
,
ch
,
1
);
if
(
res
!=
DECODE_ERROR
) {
/* decoding a non-ASCII character from the locale encoding succeed:
the locale encoding is not ASCII, force ASCII */
return
1
;
}
}
/* None of the bytes in the range 0x80-0xff can be decoded from the locale
encoding: the locale encoding is really ASCII */
#endif
/* !defined(__hpux) */
return
0
;
#else
/* nl_langinfo(CODESET) is not available: always force ASCII */
return
1
;
#endif
/* defined(HAVE_LANGINFO_H) && defined(CODESET) */
error
:
/* if an error occurred, force the ASCII encoding */
return
1
;
}
int
_Py_GetForceASCII
(
void
)
{
if
(
force_ascii
==
-1
) {
force_ascii
=
check_force_ascii
();
}
return
force_ascii
;
}
void
_Py_ResetForceASCII
(
void
)
{
force_ascii
=
-1
;
}
static
int
encode_ascii
(
const
wchar_t
*
text
,
char
*
*
str
,
size_t
*
error_pos
,
const
char
*
*
reason
,
int
raw_malloc
,
_Py_error_handler
errors
)
{
char
*
result
=
NULL
,
*
out
;
size_t
len
,
i
;
wchar_t
ch
;
int
surrogateescape
;
if
(
get_surrogateescape
(
errors
,
&
surrogateescape
)
<
0
) {
return
-3
;
}
len
=
wcslen
(
text
);
/* +1 for NULL byte */
if
(
raw_malloc
) {
result
=
PyMem_RawMalloc
(
len
+
1
);
}
else
{
result
=
PyMem_Malloc
(
len
+
1
);
}
if
(
result
==
NULL
) {
return
-1
;
}
out
=
result
;
for
(
i
=
0
;
i
<
len
;
i
++
) {
ch
=
text
[
i
];
if
(
ch
<=
0x7f
) {
/* ASCII character */
*
out
++
=
(
char
)
ch
;
}
else
if
(
surrogateescape
&&
0xdc80
<=
ch
&&
ch
<=
0xdcff
) {
/* UTF-8b surrogate */
*
out
++
=
(
char
)(
ch
-
0xdc00
);
}
else
{
if
(
raw_malloc
) {
PyMem_RawFree
(
result
);
}
else
{
PyMem_Free
(
result
);
}
if
(
error_pos
!=
NULL
) {
*
error_pos
=
i
;
}
if
(
reason
) {
*
reason
=
"encoding error"
;
}
return
-2
;
}
}
*
out
=
'\0'
;
*
str
=
result
;
return
0
;
}
#else
int
_Py_GetForceASCII
(
void
)
{
return
0
;
}
void
_Py_ResetForceASCII
(
void
)
{
/* nothing to do */
}
#endif
/* !defined(_Py_FORCE_UTF8_FS_ENCODING) && !defined(MS_WINDOWS) */
#if
!defined(
HAVE_MBRTOWC
)
||
defined(
USE_FORCE_ASCII
)
static
int
decode_ascii
(
const
char
*
arg
,
wchar_t
*
*
wstr
,
size_t
*
wlen
,
const
char
*
*
reason
,
_Py_error_handler
errors
)
{
wchar_t
*
res
;
unsigned
char
*
in
;
wchar_t
*
out
;
size_t
argsize
=
strlen
(
arg
)
+
1
;
int
surrogateescape
;
if
(
get_surrogateescape
(
errors
,
&
surrogateescape
)
<
0
) {
return
-3
;
}
if
(
argsize
>
PY_SSIZE_T_MAX
/
sizeof
(
wchar_t
)) {
return
-1
;
}
res
=
PyMem_RawMalloc
(
argsize
*
sizeof
(
wchar_t
));
if
(!
res
) {
return
-1
;
}
out
=
res
;
for
(
in
=
(
unsigned
char
*
)
arg
;
*
in
;
in
++
) {
unsigned
char
ch
=
*
in
;
if
(
ch
<
128
) {
*
out
++
=
ch
;
}
else
{
if
(!
surrogateescape
) {
PyMem_RawFree
(
res
);
if
(
wlen
) {
*
wlen
=
in
-
(
unsigned
char
*
)
arg
;
}
if
(
reason
) {
*
reason
=
"decoding error"
;
}
return
-2
;
}
*
out
++
=
0xdc00
+
ch
;
}
}
*
out
=
0
;
if
(
wlen
!=
NULL
) {
*
wlen
=
out
-
res
;
}
*
wstr
=
res
;
return
0
;
}
#endif
/* !HAVE_MBRTOWC */
static
int
decode_current_locale
(
const
char
*
arg
,
wchar_t
*
*
wstr
,
size_t
*
wlen
,
const
char
*
*
reason
,
_Py_error_handler
errors
)
{
wchar_t
*
res
;
size_t
argsize
;
size_t
count
;
#ifdef
HAVE_MBRTOWC
unsigned
char
*
in
;
wchar_t
*
out
;
mbstate_t
mbs
;
#endif
int
surrogateescape
;
if
(
get_surrogateescape
(
errors
,
&
surrogateescape
)
<
0
) {
return
-3
;
}
#ifdef
HAVE_BROKEN_MBSTOWCS
/* Some platforms have a broken implementation of
* mbstowcs which does not count the characters that
* would result from conversion. Use an upper bound.
*/
argsize
=
strlen
(
arg
);
#else
argsize
=
_Py_mbstowcs
(
NULL
,
arg
,
0
);
#endif
if
(
argsize
!=
DECODE_ERROR
) {
if
(
argsize
>
PY_SSIZE_T_MAX
/
sizeof
(
wchar_t
)
-
1
) {
return
-1
;
}
res
=
(
wchar_t
*
)
PyMem_RawMalloc
((
argsize
+
1
)
*
sizeof
(
wchar_t
));
if
(!
res
) {
return
-1
;
}
count
=
_Py_mbstowcs
(
res
,
arg
,
argsize
+
1
);
if
(
count
!=
DECODE_ERROR
) {
*
wstr
=
res
;
if
(
wlen
!=
NULL
) {
*
wlen
=
count
;
}
return
0
;
}
PyMem_RawFree
(
res
);
}
/* Conversion failed. Fall back to escaping with surrogateescape. */
#ifdef
HAVE_MBRTOWC
/* Try conversion with mbrtwoc (C99), and escape non-decodable bytes. */
/* Overallocate; as multi-byte characters are in the argument, the
actual output could use less memory. */
argsize
=
strlen
(
arg
)
+
1
;
if
(
argsize
>
PY_SSIZE_T_MAX
/
sizeof
(
wchar_t
)) {
return
-1
;
}
res
=
(
wchar_t
*
)
PyMem_RawMalloc
(
argsize
*
sizeof
(
wchar_t
));
if
(!
res
) {
return
-1
;
}
in
=
(
unsigned
char
*
)
arg
;
out
=
res
;
memset
(
&
mbs
,
0
,
sizeof
mbs
);
while
(
argsize
) {
size_t
converted
=
_Py_mbrtowc
(
out
, (
char
*
)
in
,
argsize
,
&
mbs
);
if
(
converted
==
0
) {
/* Reached end of string; null char stored. */
break
;
}
if
(
converted
==
INCOMPLETE_CHARACTER
) {
/* Incomplete character. This should never happen,
since we provide everything that we have -
unless there is a bug in the C library, or I
misunderstood how mbrtowc works. */
goto
decode_error
;
}
if
(
converted
==
DECODE_ERROR
) {
if
(!
surrogateescape
) {
goto
decode_error
;
}
/* Decoding error. Escape as UTF-8b, and start over in the initial
shift state. */
*
out
++
=
0xdc00
+
*
in
++
;
argsize
--
;
memset
(
&
mbs
,
0
,
sizeof
mbs
);
continue
;
}
// _Py_mbrtowc() reject lone surrogate characters
assert
(!
Py_UNICODE_IS_SURROGATE
(
*
out
));
/* successfully converted some bytes */
in
+=
converted
;
argsize
-=
converted
;
out
++
;
}
if
(
wlen
!=
NULL
) {
*
wlen
=
out
-
res
;
}
*
wstr
=
res
;
return
0
;
decode_error
:
PyMem_RawFree
(
res
);
if
(
wlen
) {
*
wlen
=
in
-
(
unsigned
char
*
)
arg
;
}
if
(
reason
) {
*
reason
=
"decoding error"
;
}
return
-2
;
#else
/* HAVE_MBRTOWC */
/* Cannot use C locale for escaping; manually escape as if charset
is ASCII (i.e. escape all bytes > 128. This will still roundtrip
correctly in the locale's charset, which must be an ASCII superset. */
return
decode_ascii
(
arg
,
wstr
,
wlen
,
reason
,
errors
);
#endif
/* HAVE_MBRTOWC */
}
/* Decode a byte string from the locale encoding.
Use the strict error handler if 'surrogateescape' is zero. Use the
surrogateescape error handler if 'surrogateescape' is non-zero: undecodable
bytes are decoded as characters in range U+DC80..U+DCFF. If a byte sequence
can be decoded as a surrogate character, escape the bytes using the
surrogateescape error handler instead of decoding them.
On success, return 0 and write the newly allocated wide character string into
*wstr (use PyMem_RawFree() to free the memory). If wlen is not NULL, write
the number of wide characters excluding the null character into *wlen.
On memory allocation failure, return -1.
On decoding error, return -2. If wlen is not NULL, write the start of
invalid byte sequence in the input string into *wlen. If reason is not NULL,
write the decoding error message into *reason.
Return -3 if the error handler 'errors' is not supported.
Use the Py_EncodeLocaleEx() function to encode the character string back to
a byte string. */
int
_Py_DecodeLocaleEx
(
const
char
*
arg
,
wchar_t
*
*
wstr
,
size_t
*
wlen
,
const
char
*
*
reason
,
int
current_locale
,
_Py_error_handler
errors
)
{
if
(
current_locale
) {
#ifdef
_Py_FORCE_UTF8_LOCALE
return
_Py_DecodeUTF8Ex
(
arg
,
strlen
(
arg
),
wstr
,
wlen
,
reason
,
errors
);
#else
return
decode_current_locale
(
arg
,
wstr
,
wlen
,
reason
,
errors
);
#endif
}
#ifdef
_Py_FORCE_UTF8_FS_ENCODING
return
_Py_DecodeUTF8Ex
(
arg
,
strlen
(
arg
),
wstr
,
wlen
,
reason
,
errors
);
#else
int
use_utf8
=
(
_PyRuntime
.
preconfig
.
utf8_mode
>=
1
);
#ifdef
MS_WINDOWS
use_utf8
|= (
_PyRuntime
.
preconfig
.
legacy_windows_fs_encoding
==
0
);
#endif
if
(
use_utf8
) {
return
_Py_DecodeUTF8Ex
(
arg
,
strlen
(
arg
),
wstr
,
wlen
,
reason
,
errors
);
}
#ifdef
USE_FORCE_ASCII
if
(
force_ascii
==
-1
) {
force_ascii
=
check_force_ascii
();
}
if
(
force_ascii
) {
/* force ASCII encoding to workaround mbstowcs() issue */
return
decode_ascii
(
arg
,
wstr
,
wlen
,
reason
,
errors
);
}
#endif
return
decode_current_locale
(
arg
,
wstr
,
wlen
,
reason
,
errors
);
#endif
/* !_Py_FORCE_UTF8_FS_ENCODING */
}
/* Decode a byte string from the locale encoding with the
surrogateescape error handler: undecodable bytes are decoded as characters
in range U+DC80..U+DCFF. If a byte sequence can be decoded as a surrogate
character, escape the bytes using the surrogateescape error handler instead
of decoding them.
Return a pointer to a newly allocated wide character string, use
PyMem_RawFree() to free the memory. If size is not NULL, write the number of
wide characters excluding the null character into *size
Return NULL on decoding error or memory allocation error. If *size* is not
NULL, *size is set to (size_t)-1 on memory error or set to (size_t)-2 on
decoding error.
Decoding errors should never happen, unless there is a bug in the C
library.
Use the Py_EncodeLocale() function to encode the character string back to a
byte string. */
wchar_t
*
Py_DecodeLocale
(
const
char
*
arg
,
size_t
*
wlen
)
{
wchar_t
*
wstr
;
int
res
=
_Py_DecodeLocaleEx
(
arg
,
&
wstr
,
wlen
,
NULL
,
0
,
_Py_ERROR_SURROGATEESCAPE
);
if
(
res
!=
0
) {
assert
(
res
!=
-3
);
if
(
wlen
!=
NULL
) {
*
wlen
=
(
size_t
)
res
;
}
return
NULL
;
}
return
wstr
;
}
static
int
encode_current_locale
(
const
wchar_t
*
text
,
char
*
*
str
,
size_t
*
error_pos
,
const
char
*
*
reason
,
int
raw_malloc
,
_Py_error_handler
errors
)
{
const
size_t
len
=
wcslen
(
text
);
char
*
result
=
NULL
,
*
bytes
=
NULL
;
size_t
i
,
size
,
converted
;
wchar_t
c
,
buf
[
2
];
int
surrogateescape
;
if
(
get_surrogateescape
(
errors
,
&
surrogateescape
)
<
0
) {
return
-3
;
}
/* The function works in two steps:
1. compute the length of the output buffer in bytes (size)
2. outputs the bytes */
size
=
0
;
buf
[
1
]
=
0
;
while
(
1
) {
for
(
i
=
0
;
i
<
len
;
i
++
) {
c
=
text
[
i
];
if
(
c
>=
0xdc80
&&
c
<=
0xdcff
) {
if
(!
surrogateescape
) {
goto
encode_error
;
}
/* UTF-8b surrogate */
if
(
bytes
!=
NULL
) {
*
bytes
++
=
c
-
0xdc00
;
size
--
;
}
else
{
size
++
;
}
continue
;
}
else
{
buf
[
0
]
=
c
;
if
(
bytes
!=
NULL
) {
converted
=
wcstombs
(
bytes
,
buf
,
size
);
}
else
{
converted
=
wcstombs
(
NULL
,
buf
,
0
);
}
if
(
converted
==
DECODE_ERROR
) {
goto
encode_error
;
}
if
(
bytes
!=
NULL
) {
bytes
+=
converted
;
size
-=
converted
;
}
else
{
size
+=
converted
;
}
}
}
if
(
result
!=
NULL
) {
*
bytes
=
'\0'
;
break
;
}
size
+=
1
;
/* nul byte at the end */
if
(
raw_malloc
) {
result
=
PyMem_RawMalloc
(
size
);
}
else
{
result
=
PyMem_Malloc
(
size
);
}
if
(
result
==
NULL
) {
return
-1
;
}
bytes
=
result
;
}
*
str
=
result
;
return
0
;
encode_error
:
if
(
raw_malloc
) {
PyMem_RawFree
(
result
);
}
else
{
PyMem_Free
(
result
);
}
if
(
error_pos
!=
NULL
) {
*
error_pos
=
i
;
}
if
(
reason
) {
*
reason
=
"encoding error"
;
}
return
-2
;
}
/* Encode a string to the locale encoding.
Parameters:
* raw_malloc: if non-zero, allocate memory using PyMem_RawMalloc() instead
of PyMem_Malloc().
* current_locale: if non-zero, use the current LC_CTYPE, otherwise use
Python filesystem encoding.
* errors: error handler like "strict" or "surrogateescape".
Return value:
0: success, *str is set to a newly allocated decoded string.
-1: memory allocation failure
-2: encoding error, set *error_pos and *reason (if set).
-3: the error handler 'errors' is not supported.
*/
static
int
encode_locale_ex
(
const
wchar_t
*
text
,
char
*
*
str
,
size_t
*
error_pos
,
const
char
*
*
reason
,
int
raw_malloc
,
int
current_locale
,
_Py_error_handler
errors
)
{
if
(
current_locale
) {
#ifdef
_Py_FORCE_UTF8_LOCALE
return
_Py_EncodeUTF8Ex
(
text
,
str
,
error_pos
,
reason
,
raw_malloc
,
errors
);
#else
return
encode_current_locale
(
text
,
str
,
error_pos
,
reason
,
raw_malloc
,
errors
);
#endif
}
#ifdef
_Py_FORCE_UTF8_FS_ENCODING
return
_Py_EncodeUTF8Ex
(
text
,
str
,
error_pos
,
reason
,
raw_malloc
,
errors
);
#else
int
use_utf8
=
(
_PyRuntime
.
preconfig
.
utf8_mode
>=
1
);
#ifdef
MS_WINDOWS
use_utf8
|= (
_PyRuntime
.
preconfig
.
legacy_windows_fs_encoding
==
0
);
#endif
if
(
use_utf8
) {
return
_Py_EncodeUTF8Ex
(
text
,
str
,
error_pos
,
reason
,
raw_malloc
,
errors
);
}
#ifdef
USE_FORCE_ASCII
if
(
force_ascii
==
-1
) {
force_ascii
=
check_force_ascii
();
}
if
(
force_ascii
) {
return
encode_ascii
(
text
,
str
,
error_pos
,
reason
,
raw_malloc
,
errors
);
}
#endif
return
encode_current_locale
(
text
,
str
,
error_pos
,
reason
,
raw_malloc
,
errors
);
#endif
/* _Py_FORCE_UTF8_FS_ENCODING */
}
static
char
*
encode_locale
(
const
wchar_t
*
text
,
size_t
*
error_pos
,
int
raw_malloc
,
int
current_locale
)
{
char
*
str
;
int
res
=
encode_locale_ex
(
text
,
&
str
,
error_pos
,
NULL
,
raw_malloc
,
current_locale
,
_Py_ERROR_SURROGATEESCAPE
);
if
(
res
!=
-2
&&
error_pos
) {
*
error_pos
=
(
size_t
)
-1
;
}
if
(
res
!=
0
) {
return
NULL
;
}
return
str
;
}
/* Encode a wide character string to the locale encoding with the
surrogateescape error handler: surrogate characters in the range
U+DC80..U+DCFF are converted to bytes 0x80..0xFF.
Return a pointer to a newly allocated byte string, use PyMem_Free() to free
the memory. Return NULL on encoding or memory allocation error.
If error_pos is not NULL, *error_pos is set to (size_t)-1 on success, or set
to the index of the invalid character on encoding error.
Use the Py_DecodeLocale() function to decode the bytes string back to a wide
character string. */
char
*
Py_EncodeLocale
(
const
wchar_t
*
text
,
size_t
*
error_pos
)
{
return
encode_locale
(
text
,
error_pos
,
0
,
0
);
}
/* Similar to Py_EncodeLocale(), but result must be freed by PyMem_RawFree()
instead of PyMem_Free(). */
char
*
_Py_EncodeLocaleRaw
(
const
wchar_t
*
text
,
size_t
*
error_pos
)
{
return
encode_locale
(
text
,
error_pos
,
1
,
0
);
}
int
_Py_EncodeLocaleEx
(
const
wchar_t
*
text
,
char
*
*
str
,
size_t
*
error_pos
,
const
char
*
*
reason
,
int
current_locale
,
_Py_error_handler
errors
)
{
return
encode_locale_ex
(
text
,
str
,
error_pos
,
reason
,
1
,
current_locale
,
errors
);
}
// Get the current locale encoding name:
//
// - Return "utf-8" if _Py_FORCE_UTF8_LOCALE macro is defined (ex: on Android)
// - Return "utf-8" if the UTF-8 Mode is enabled
// - On Windows, return the ANSI code page (ex: "cp1250")
// - Return "utf-8" if nl_langinfo(CODESET) returns an empty string.
// - Otherwise, return nl_langinfo(CODESET).
//
// Return NULL on memory allocation failure.
//
// See also config_get_locale_encoding()
wchar_t
*
_Py_GetLocaleEncoding
(
void
)
{
#ifdef
_Py_FORCE_UTF8_LOCALE
// On Android langinfo.h and CODESET are missing,
// and UTF-8 is always used in mbstowcs() and wcstombs().
return
_PyMem_RawWcsdup
(
L"utf-8"
);
#else
#ifdef
MS_WINDOWS
wchar_t
encoding
[
23
];
unsigned
int
ansi_codepage
=
GetACP
();
swprintf
(
encoding
,
Py_ARRAY_LENGTH
(
encoding
),
L"cp%u"
,
ansi_codepage
);
encoding
[
Py_ARRAY_LENGTH
(
encoding
)
-
1
]
=
0
;
return
_PyMem_RawWcsdup
(
encoding
);
#else
const
char
*
encoding
=
nl_langinfo
(
CODESET
);
if
(!
encoding
||
encoding
[
0
]
==
'\0'
) {
// Use UTF-8 if nl_langinfo() returns an empty string. It can happen on
// macOS if the LC_CTYPE locale is not supported.
return
_PyMem_RawWcsdup
(
L"utf-8"
);
}
wchar_t
*
wstr
;
int
res
=
decode_current_locale
(
encoding
,
&
wstr
,
NULL
,
NULL
,
_Py_ERROR_SURROGATEESCAPE
);
if
(
res
<
0
) {
return
NULL
;
}
return
wstr
;
#endif
// !MS_WINDOWS
#endif
// !_Py_FORCE_UTF8_LOCALE
}
PyObject
*
_Py_GetLocaleEncodingObject
(
void
)
{
wchar_t
*
encoding
=
_Py_GetLocaleEncoding
();
if
(
encoding
==
NULL
) {
PyErr_NoMemory
();
return
NULL
;
}
PyObject
*
str
=
PyUnicode_FromWideChar
(
encoding
,
-1
);
PyMem_RawFree
(
encoding
);
return
str
;
}
#ifdef
HAVE_NON_UNICODE_WCHAR_T_REPRESENTATION
/* Check whether current locale uses Unicode as internal wchar_t form. */
int
_Py_LocaleUsesNonUnicodeWchar
(
void
)
{
/* Oracle Solaris uses non-Unicode internal wchar_t form for
non-Unicode locales and hence needs conversion to UTF first. */
char
*
codeset
=
nl_langinfo
(
CODESET
);
if
(!
codeset
) {
return
0
;
}
/* 646 refers to ISO/IEC 646 standard that corresponds to ASCII encoding */
return
(
strcmp
(
codeset
,
"UTF-8"
)
!=
0
&&
strcmp
(
codeset
,
"646"
)
!=
0
);
}
static
wchar_t
*
_Py_ConvertWCharForm
(
const
wchar_t
*
source
,
Py_ssize_t
size
,
const
char
*
tocode
,
const
char
*
fromcode
)
{
static_assert
(
sizeof
(
wchar_t
)
==
4
,
"wchar_t must be 32-bit"
);
/* Ensure we won't overflow the size. */
if
(
size
>
(
PY_SSIZE_T_MAX
/ (
Py_ssize_t
)
sizeof
(
wchar_t
))) {
PyErr_NoMemory
();
return
NULL
;
}
/* the string doesn't have to be NULL terminated */
wchar_t
*
target
=
PyMem_Malloc
(
size
*
sizeof
(
wchar_t
));
if
(
target
==
NULL
) {
PyErr_NoMemory
();
return
NULL
;
}
iconv_t
cd
=
iconv_open
(
tocode
,
fromcode
);
if
(
cd
==
(
iconv_t
)
-
1
) {
PyErr_Format
(
PyExc_ValueError
,
"iconv_open() failed"
);
PyMem_Free
(
target
);
return
NULL
;
}
char
*
inbuf
=
(
char
*
)
source
;
char
*
outbuf
=
(
char
*
)
target
;
size_t
inbytesleft
=
sizeof
(
wchar_t
)
*
size
;
size_t
outbytesleft
=
inbytesleft
;
size_t
ret
=
iconv
(
cd
,
&
inbuf
,
&
inbytesleft
,
&
outbuf
,
&
outbytesleft
);
if
(
ret
==
DECODE_ERROR
) {
PyErr_Format
(
PyExc_ValueError
,
"iconv() failed"
);
PyMem_Free
(
target
);
iconv_close
(
cd
);
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