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/* String (str/bytes) object implementation */
#define
PY_SSIZE_T_CLEAN
#include
"Python.h"
#include
<ctype.h>
#include
<stddef.h>
#ifdef
COUNT_ALLOCS
Py_ssize_t
null_strings
,
one_strings
;
#endif
static
PyStringObject
*
characters
[
UCHAR_MAX
+
1
];
static
PyStringObject
*
nullstring
;
/* This dictionary holds all interned strings. Note that references to
strings in this dictionary are *not* counted in the string's ob_refcnt.
When the interned string reaches a refcnt of 0 the string deallocation
function will delete the reference from this dictionary.
Another way to look at this is that to say that the actual reference
count of a string is: s->ob_refcnt + (s->ob_sstate?2:0)
*/
static
PyObject
*
interned
;
/* PyStringObject_SIZE gives the basic size of a string; any memory allocation
for a string of length n should request PyStringObject_SIZE + n bytes.
Using PyStringObject_SIZE instead of sizeof(PyStringObject) saves
3 bytes per string allocation on a typical system.
*/
#define
PyStringObject_SIZE
(offsetof(PyStringObject, ob_sval) + 1)
/*
For both PyString_FromString() and PyString_FromStringAndSize(), the
parameter `size' denotes number of characters to allocate, not counting any
null terminating character.
For PyString_FromString(), the parameter `str' points to a null-terminated
string containing exactly `size' bytes.
For PyString_FromStringAndSize(), the parameter the parameter `str' is
either NULL or else points to a string containing at least `size' bytes.
For PyString_FromStringAndSize(), the string in the `str' parameter does
not have to be null-terminated. (Therefore it is safe to construct a
substring by calling `PyString_FromStringAndSize(origstring, substrlen)'.)
If `str' is NULL then PyString_FromStringAndSize() will allocate `size+1'
bytes (setting the last byte to the null terminating character) and you can
fill in the data yourself. If `str' is non-NULL then the resulting
PyString object must be treated as immutable and you must not fill in nor
alter the data yourself, since the strings may be shared.
The PyObject member `op->ob_size', which denotes the number of "extra
items" in a variable-size object, will contain the number of bytes
allocated for string data, not counting the null terminating character. It
is therefore equal to the equal to the `size' parameter (for
PyString_FromStringAndSize()) or the length of the string in the `str'
parameter (for PyString_FromString()).
*/
PyObject
*
PyString_FromStringAndSize
(
const
char
*
str
,
Py_ssize_t
size
)
{
register
PyStringObject
*
op
;
if
(
size
<
0
) {
PyErr_SetString
(
PyExc_SystemError
,
"Negative size passed to PyString_FromStringAndSize"
);
return
NULL
;
}
if
(
size
==
0
&&
(
op
=
nullstring
)
!=
NULL
) {
#ifdef
COUNT_ALLOCS
null_strings
++
;
#endif
Py_INCREF
(
op
);
return
(
PyObject
*
)
op
;
}
if
(
size
==
1
&&
str
!=
NULL
&&
(
op
=
characters
[
*
str
&
UCHAR_MAX
])
!=
NULL
)
{
#ifdef
COUNT_ALLOCS
one_strings
++
;
#endif
Py_INCREF
(
op
);
return
(
PyObject
*
)
op
;
}
if
(
size
>
PY_SSIZE_T_MAX
-
PyStringObject_SIZE
) {
PyErr_SetString
(
PyExc_OverflowError
,
"string is too large"
);
return
NULL
;
}
/* Inline PyObject_NewVar */
op
=
(
PyStringObject
*
)
PyObject_MALLOC
(
PyStringObject_SIZE
+
size
);
if
(
op
==
NULL
)
return
PyErr_NoMemory
();
PyObject_INIT_VAR
(
op
,
&
PyString_Type
,
size
);
op
->
ob_shash
=
-1
;
op
->
ob_sstate
=
SSTATE_NOT_INTERNED
;
if
(
str
!=
NULL
)
Py_MEMCPY
(
op
->
ob_sval
,
str
,
size
);
op
->
ob_sval
[
size
]
=
'\0'
;
/* share short strings */
if
(
size
==
0
) {
PyObject
*
t
=
(
PyObject
*
)
op
;
PyString_InternInPlace
(
&
t
);
op
=
(
PyStringObject
*
)
t
;
nullstring
=
op
;
Py_INCREF
(
op
);
}
else
if
(
size
==
1
&&
str
!=
NULL
) {
PyObject
*
t
=
(
PyObject
*
)
op
;
PyString_InternInPlace
(
&
t
);
op
=
(
PyStringObject
*
)
t
;
characters
[
*
str
&
UCHAR_MAX
]
=
op
;
Py_INCREF
(
op
);
}
return
(
PyObject
*
)
op
;
}
PyObject
*
PyString_FromString
(
const
char
*
str
)
{
register
size_t
size
;
register
PyStringObject
*
op
;
assert
(
str
!=
NULL
);
size
=
strlen
(
str
);
if
(
size
>
PY_SSIZE_T_MAX
-
PyStringObject_SIZE
) {
PyErr_SetString
(
PyExc_OverflowError
,
"string is too long for a Python string"
);
return
NULL
;
}
if
(
size
==
0
&&
(
op
=
nullstring
)
!=
NULL
) {
#ifdef
COUNT_ALLOCS
null_strings
++
;
#endif
Py_INCREF
(
op
);
return
(
PyObject
*
)
op
;
}
if
(
size
==
1
&&
(
op
=
characters
[
*
str
&
UCHAR_MAX
])
!=
NULL
) {
#ifdef
COUNT_ALLOCS
one_strings
++
;
#endif
Py_INCREF
(
op
);
return
(
PyObject
*
)
op
;
}
/* Inline PyObject_NewVar */
op
=
(
PyStringObject
*
)
PyObject_MALLOC
(
PyStringObject_SIZE
+
size
);
if
(
op
==
NULL
)
return
PyErr_NoMemory
();
PyObject_INIT_VAR
(
op
,
&
PyString_Type
,
size
);
op
->
ob_shash
=
-1
;
op
->
ob_sstate
=
SSTATE_NOT_INTERNED
;
Py_MEMCPY
(
op
->
ob_sval
,
str
,
size
+
1
);
/* share short strings */
if
(
size
==
0
) {
PyObject
*
t
=
(
PyObject
*
)
op
;
PyString_InternInPlace
(
&
t
);
op
=
(
PyStringObject
*
)
t
;
nullstring
=
op
;
Py_INCREF
(
op
);
}
else
if
(
size
==
1
) {
PyObject
*
t
=
(
PyObject
*
)
op
;
PyString_InternInPlace
(
&
t
);
op
=
(
PyStringObject
*
)
t
;
characters
[
*
str
&
UCHAR_MAX
]
=
op
;
Py_INCREF
(
op
);
}
return
(
PyObject
*
)
op
;
}
PyObject
*
PyString_FromFormatV
(
const
char
*
format
,
va_list
vargs
)
{
va_list
count
;
Py_ssize_t
n
=
0
;
const
char
*
f
;
char
*
s
;
PyObject
*
string
;
#ifdef
VA_LIST_IS_ARRAY
Py_MEMCPY
(
count
,
vargs
,
sizeof
(
va_list
));
#else
#ifdef
__va_copy
__va_copy
(
count
,
vargs
);
#else
count
=
vargs
;
#endif
#endif
/* step 1: figure out how large a buffer we need */
for
(
f
=
format
;
*
f
;
f
++
) {
if
(
*
f
==
'%'
) {
const
char
*
p
=
f
;
while
(
*
++
f
&&
*
f
!=
'%'
&&
!
isalpha
(
Py_CHARMASK
(
*
f
)))
;
/* skip the 'l' or 'z' in {%ld, %zd, %lu, %zu} since
* they don't affect the amount of space we reserve.
*/
if
((
*
f
==
'l'
||
*
f
==
'z'
)
&&
(
f
[
1
]
==
'd'
||
f
[
1
]
==
'u'
))
++
f
;
switch
(
*
f
) {
case
'c'
:
(
void
)
va_arg
(
count
,
int
);
/* fall through... */
case
'%'
:
n
++
;
break
;
case
'd'
:
case
'u'
:
case
'i'
:
case
'x'
:
(
void
)
va_arg
(
count
,
int
);
/* 20 bytes is enough to hold a 64-bit
integer. Decimal takes the most space.
This isn't enough for octal. */
n
+=
20
;
break
;
case
's'
:
s
=
va_arg
(
count
,
char
*
);
n
+=
strlen
(
s
);
break
;
case
'p'
:
(
void
)
va_arg
(
count
,
int
);
/* maximum 64-bit pointer representation:
* 0xffffffffffffffff
* so 19 characters is enough.
* XXX I count 18 -- what's the extra for?
*/
n
+=
19
;
break
;
default
:
/* if we stumble upon an unknown
formatting code, copy the rest of
the format string to the output
string. (we cannot just skip the
code, since there's no way to know
what's in the argument list) */
n
+=
strlen
(
p
);
goto
expand
;
}
}
else
n
++
;
}
expand
:
/* step 2: fill the buffer */
/* Since we've analyzed how much space we need for the worst case,
use sprintf directly instead of the slower PyOS_snprintf. */
string
=
PyString_FromStringAndSize
(
NULL
,
n
);
if
(!
string
)
return
NULL
;
s
=
PyString_AsString
(
string
);
for
(
f
=
format
;
*
f
;
f
++
) {
if
(
*
f
==
'%'
) {
const
char
*
p
=
f
++
;
Py_ssize_t
i
;
int
longflag
=
0
;
int
size_tflag
=
0
;
/* parse the width.precision part (we're only
interested in the precision value, if any) */
n
=
0
;
while
(
isdigit
(
Py_CHARMASK
(
*
f
)))
n
=
(
n
*
10
)
+
*
f
++
-
'0'
;
if
(
*
f
==
'.'
) {
f
++
;
n
=
0
;
while
(
isdigit
(
Py_CHARMASK
(
*
f
)))
n
=
(
n
*
10
)
+
*
f
++
-
'0'
;
}
while
(
*
f
&&
*
f
!=
'%'
&&
!
isalpha
(
Py_CHARMASK
(
*
f
)))
f
++
;
/* handle the long flag, but only for %ld and %lu.
others can be added when necessary. */
if
(
*
f
==
'l'
&&
(
f
[
1
]
==
'd'
||
f
[
1
]
==
'u'
)) {
longflag
=
1
;
++
f
;
}
/* handle the size_t flag. */
if
(
*
f
==
'z'
&&
(
f
[
1
]
==
'd'
||
f
[
1
]
==
'u'
)) {
size_tflag
=
1
;
++
f
;
}
switch
(
*
f
) {
case
'c'
:
*
s
++
=
va_arg
(
vargs
,
int
);
break
;
case
'd'
:
if
(
longflag
)
sprintf
(
s
,
"%ld"
,
va_arg
(
vargs
,
long
));
else
if
(
size_tflag
)
sprintf
(
s
,
"%"
PY_FORMAT_SIZE_T
"d"
,
va_arg
(
vargs
,
Py_ssize_t
));
else
sprintf
(
s
,
"%d"
,
va_arg
(
vargs
,
int
));
s
+=
strlen
(
s
);
break
;
case
'u'
:
if
(
longflag
)
sprintf
(
s
,
"%lu"
,
va_arg
(
vargs
,
unsigned
long
));
else
if
(
size_tflag
)
sprintf
(
s
,
"%"
PY_FORMAT_SIZE_T
"u"
,
va_arg
(
vargs
,
size_t
));
else
sprintf
(
s
,
"%u"
,
va_arg
(
vargs
,
unsigned
int
));
s
+=
strlen
(
s
);
break
;
case
'i'
:
sprintf
(
s
,
"%i"
,
va_arg
(
vargs
,
int
));
s
+=
strlen
(
s
);
break
;
case
'x'
:
sprintf
(
s
,
"%x"
,
va_arg
(
vargs
,
int
));
s
+=
strlen
(
s
);
break
;
case
's'
:
p
=
va_arg
(
vargs
,
char
*
);
i
=
strlen
(
p
);
if
(
n
>
0
&&
i
>
n
)
i
=
n
;
Py_MEMCPY
(
s
,
p
,
i
);
s
+=
i
;
break
;
case
'p'
:
sprintf
(
s
,
"%p"
,
va_arg
(
vargs
,
void
*
));
/* %p is ill-defined: ensure leading 0x. */
if
(
s
[
1
]
==
'X'
)
s
[
1
]
=
'x'
;
else
if
(
s
[
1
]
!=
'x'
) {
memmove
(
s
+
2
,
s
,
strlen
(
s
)
+
1
);
s
[
0
]
=
'0'
;
s
[
1
]
=
'x'
;
}
s
+=
strlen
(
s
);
break
;
case
'%'
:
*
s
++
=
'%'
;
break
;
default
:
strcpy
(
s
,
p
);
s
+=
strlen
(
s
);
goto
end
;
}
}
else
*
s
++
=
*
f
;
}
end
:
_PyString_Resize
(
&
string
,
s
-
PyString_AS_STRING
(
string
));
return
string
;
}
PyObject
*
PyString_FromFormat
(
const
char
*
format
, ...)
{
PyObject
*
ret
;
va_list
vargs
;
#ifdef
HAVE_STDARG_PROTOTYPES
va_start
(
vargs
,
format
);
#else
va_start
(
vargs
);
#endif
ret
=
PyString_FromFormatV
(
format
,
vargs
);
va_end
(
vargs
);
return
ret
;
}
PyObject
*
PyString_Decode
(
const
char
*
s
,
Py_ssize_t
size
,
const
char
*
encoding
,
const
char
*
errors
)
{
PyObject
*
v
,
*
str
;
str
=
PyString_FromStringAndSize
(
s
,
size
);
if
(
str
==
NULL
)
return
NULL
;
v
=
PyString_AsDecodedString
(
str
,
encoding
,
errors
);
Py_DECREF
(
str
);
return
v
;
}
PyObject
*
PyString_AsDecodedObject
(
PyObject
*
str
,
const
char
*
encoding
,
const
char
*
errors
)
{
PyObject
*
v
;
if
(!
PyString_Check
(
str
)) {
PyErr_BadArgument
();
goto
onError
;
}
if
(
encoding
==
NULL
) {
#ifdef
Py_USING_UNICODE
encoding
=
PyUnicode_GetDefaultEncoding
();
#else
PyErr_SetString
(
PyExc_ValueError
,
"no encoding specified"
);
goto
onError
;
#endif
}
/* Decode via the codec registry */
v
=
PyCodec_Decode
(
str
,
encoding
,
errors
);
if
(
v
==
NULL
)
goto
onError
;
return
v
;
onError
:
return
NULL
;
}
PyObject
*
PyString_AsDecodedString
(
PyObject
*
str
,
const
char
*
encoding
,
const
char
*
errors
)
{
PyObject
*
v
;
v
=
PyString_AsDecodedObject
(
str
,
encoding
,
errors
);
if
(
v
==
NULL
)
goto
onError
;
#ifdef
Py_USING_UNICODE
/* Convert Unicode to a string using the default encoding */
if
(
PyUnicode_Check
(
v
)) {
PyObject
*
temp
=
v
;
v
=
PyUnicode_AsEncodedString
(
v
,
NULL
,
NULL
);
Py_DECREF
(
temp
);
if
(
v
==
NULL
)
goto
onError
;
}
#endif
if
(!
PyString_Check
(
v
)) {
PyErr_Format
(
PyExc_TypeError
,
"decoder did not return a string object (type=%.400s)"
,
Py_TYPE
(
v
)
->
tp_name
);
Py_DECREF
(
v
);
goto
onError
;
}
return
v
;
onError
:
return
NULL
;
}
PyObject
*
PyString_Encode
(
const
char
*
s
,
Py_ssize_t
size
,
const
char
*
encoding
,
const
char
*
errors
)
{
PyObject
*
v
,
*
str
;
str
=
PyString_FromStringAndSize
(
s
,
size
);
if
(
str
==
NULL
)
return
NULL
;
v
=
PyString_AsEncodedString
(
str
,
encoding
,
errors
);
Py_DECREF
(
str
);
return
v
;
}
PyObject
*
PyString_AsEncodedObject
(
PyObject
*
str
,
const
char
*
encoding
,
const
char
*
errors
)
{
PyObject
*
v
;
if
(!
PyString_Check
(
str
)) {
PyErr_BadArgument
();
goto
onError
;
}
if
(
encoding
==
NULL
) {
#ifdef
Py_USING_UNICODE
encoding
=
PyUnicode_GetDefaultEncoding
();
#else
PyErr_SetString
(
PyExc_ValueError
,
"no encoding specified"
);
goto
onError
;
#endif
}
/* Encode via the codec registry */
v
=
PyCodec_Encode
(
str
,
encoding
,
errors
);
if
(
v
==
NULL
)
goto
onError
;
return
v
;
onError
:
return
NULL
;
}
PyObject
*
PyString_AsEncodedString
(
PyObject
*
str
,
const
char
*
encoding
,
const
char
*
errors
)
{
PyObject
*
v
;
v
=
PyString_AsEncodedObject
(
str
,
encoding
,
errors
);
if
(
v
==
NULL
)
goto
onError
;
#ifdef
Py_USING_UNICODE
/* Convert Unicode to a string using the default encoding */
if
(
PyUnicode_Check
(
v
)) {
PyObject
*
temp
=
v
;
v
=
PyUnicode_AsEncodedString
(
v
,
NULL
,
NULL
);
Py_DECREF
(
temp
);
if
(
v
==
NULL
)
goto
onError
;
}
#endif
if
(!
PyString_Check
(
v
)) {
PyErr_Format
(
PyExc_TypeError
,
"encoder did not return a string object (type=%.400s)"
,
Py_TYPE
(
v
)
->
tp_name
);
Py_DECREF
(
v
);
goto
onError
;
}
return
v
;
onError
:
return
NULL
;
}
static
void
string_dealloc
(
PyObject
*
op
)
{
switch
(
PyString_CHECK_INTERNED
(
op
)) {
case
SSTATE_NOT_INTERNED
:
break
;
case
SSTATE_INTERNED_MORTAL
:
/* revive dead object temporarily for DelItem */
Py_REFCNT
(
op
)
=
3
;
if
(
PyDict_DelItem
(
interned
,
op
)
!=
0
)
Py_FatalError
(
"deletion of interned string failed"
);
break
;
case
SSTATE_INTERNED_IMMORTAL
:
Py_FatalError
(
"Immortal interned string died."
);
default
:
Py_FatalError
(
"Inconsistent interned string state."
);
}
Py_TYPE
(
op
)
->
tp_free
(
op
);
}
/* Unescape a backslash-escaped string. If unicode is non-zero,
the string is a u-literal. If recode_encoding is non-zero,
the string is UTF-8 encoded and should be re-encoded in the
specified encoding. */
PyObject
*
PyString_DecodeEscape
(
const
char
*
s
,
Py_ssize_t
len
,
const
char
*
errors
,
Py_ssize_t
unicode
,
const
char
*
recode_encoding
)
{
int
c
;
char
*
p
,
*
buf
;
const
char
*
end
;
PyObject
*
v
;
Py_ssize_t
newlen
=
recode_encoding
?
4
*
len
:
len
;
v
=
PyString_FromStringAndSize
((
char
*
)
NULL
,
newlen
);
if
(
v
==
NULL
)
return
NULL
;
p
=
buf
=
PyString_AsString
(
v
);
end
=
s
+
len
;
while
(
s
<
end
) {
if
(
*
s
!=
'\\'
) {
non_esc
:
#ifdef
Py_USING_UNICODE
if
(
recode_encoding
&&
(
*
s
&
0x80
)) {
PyObject
*
u
,
*
w
;
char
*
r
;
const
char
*
t
;
Py_ssize_t
rn
;
t
=
s
;
/* Decode non-ASCII bytes as UTF-8. */
while
(
t
<
end
&&
(
*
t
&
0x80
))
t
++
;
u
=
PyUnicode_DecodeUTF8
(
s
,
t
-
s
,
errors
);
if
(!
u
) goto
failed
;
/* Recode them in target encoding. */
w
=
PyUnicode_AsEncodedString
(
u
,
recode_encoding
,
errors
);
Py_DECREF
(
u
);
if
(!
w
) goto
failed
;
/* Append bytes to output buffer. */
assert
(
PyString_Check
(
w
));
r
=
PyString_AS_STRING
(
w
);
rn
=
PyString_GET_SIZE
(
w
);
Py_MEMCPY
(
p
,
r
,
rn
);
p
+=
rn
;
Py_DECREF
(
w
);
s
=
t
;
}
else
{
*
p
++
=
*
s
++
;
}
#else
*
p
++
=
*
s
++
;
#endif
continue
;
}
s
++
;
if
(
s
==
end
) {
PyErr_SetString
(
PyExc_ValueError
,
"Trailing \\ in string"
);
goto
failed
;
}
switch
(
*
s
++
) {
/* XXX This assumes ASCII! */
case
'\n'
:
break
;
case
'\\'
:
*
p
++
=
'\\'
;
break
;
case
'\''
:
*
p
++
=
'\''
;
break
;
case
'\"'
:
*
p
++
=
'\"'
;
break
;
case
'b'
:
*
p
++
=
'\b'
;
break
;
case
'f'
:
*
p
++
=
'\014'
;
break
;
/* FF */
case
't'
:
*
p
++
=
'\t'
;
break
;
case
'n'
:
*
p
++
=
'\n'
;
break
;
case
'r'
:
*
p
++
=
'\r'
;
break
;
case
'v'
:
*
p
++
=
'\013'
;
break
;
/* VT */
case
'a'
:
*
p
++
=
'\007'
;
break
;
/* BEL, not classic C */
case
'0'
:
case
'1'
:
case
'2'
:
case
'3'
:
case
'4'
:
case
'5'
:
case
'6'
:
case
'7'
:
c
=
s
[
-1
]
-
'0'
;
if
(
s
<
end
&&
'0'
<=
*
s
&&
*
s
<=
'7'
) {
c
=
(
c
<<
3
)
+
*
s
++
-
'0'
;
if
(
s
<
end
&&
'0'
<=
*
s
&&
*
s
<=
'7'
)
c
=
(
c
<<
3
)
+
*
s
++
-
'0'
;
}
*
p
++
=
c
;
break
;
case
'x'
:
if
(
s
+
1
<
end
&&
isxdigit
(
Py_CHARMASK
(
s
[
0
]))
&&
isxdigit
(
Py_CHARMASK
(
s
[
1
])))
{
unsigned
int
x
=
0
;
c
=
Py_CHARMASK
(
*
s
);
s
++
;
if
(
isdigit
(
c
))
x
=
c
-
'0'
;
else
if
(
islower
(
c
))
x
=
10
+
c
-
'a'
;
else
x
=
10
+
c
-
'A'
;
x
=
x
<<
4
;
c
=
Py_CHARMASK
(
*
s
);
s
++
;
if
(
isdigit
(
c
))
x
+=
c
-
'0'
;
else
if
(
islower
(
c
))
x
+=
10
+
c
-
'a'
;
else
x
+=
10
+
c
-
'A'
;
*
p
++
=
x
;
break
;
}
if
(!
errors
||
strcmp
(
errors
,
"strict"
)
==
0
) {
PyErr_SetString
(
PyExc_ValueError
,
"invalid \\x escape"
);
goto
failed
;
}
if
(
strcmp
(
errors
,
"replace"
)
==
0
) {
*
p
++
=
'?'
;
}
else
if
(
strcmp
(
errors
,
"ignore"
)
==
0
)
/* do nothing */
;
else
{
PyErr_Format
(
PyExc_ValueError
,
"decoding error; "
"unknown error handling code: %.400s"
,
errors
);
goto
failed
;
}
#ifndef
Py_USING_UNICODE
case
'u'
:
case
'U'
:
case
'N'
:
if
(
unicode
) {
PyErr_SetString
(
PyExc_ValueError
,
"Unicode escapes not legal "
"when Unicode disabled"
);
goto
failed
;
}
#endif
default
:
*
p
++
=
'\\'
;
s
--
;
goto
non_esc
;
/* an arbitry number of unescaped
UTF-8 bytes may follow. */
}
}
if
(
p
-
buf
<
newlen
)
_PyString_Resize
(
&
v
,
p
-
buf
);
return
v
;
failed
:
Py_DECREF
(
v
);
return
NULL
;
}
/* -------------------------------------------------------------------- */
/* object api */
static
Py_ssize_t
string_getsize
(register
PyObject
*
op
)
{
char
*
s
;
Py_ssize_t
len
;
if
(
PyString_AsStringAndSize
(
op
,
&
s
,
&
len
))
return
-1
;
return
len
;
}
static
/*const*/
char
*
string_getbuffer
(register
PyObject
*
op
)
{
char
*
s
;
Py_ssize_t
len
;
if
(
PyString_AsStringAndSize
(
op
,
&
s
,
&
len
))
return
NULL
;
return
s
;
}
Py_ssize_t
PyString_Size
(register
PyObject
*
op
)
{
if
(!
PyString_Check
(
op
))
return
string_getsize
(
op
);
return
Py_SIZE
(
op
);
}
/*const*/
char
*
PyString_AsString
(register
PyObject
*
op
)
{
if
(!
PyString_Check
(
op
))
return
string_getbuffer
(
op
);
return
((
PyStringObject
*
)
op
)
->
ob_sval
;
}
int
PyString_AsStringAndSize
(register
PyObject
*
obj
,
register
char
*
*
s
,
register
Py_ssize_t
*
len
)
{
if
(
s
==
NULL
) {
PyErr_BadInternalCall
();
return
-1
;
}
if
(!
PyString_Check
(
obj
)) {
#ifdef
Py_USING_UNICODE
if
(
PyUnicode_Check
(
obj
)) {
obj
=
_PyUnicode_AsDefaultEncodedString
(
obj
,
NULL
);
if
(
obj
==
NULL
)
return
-1
;
}
else
#endif
{
PyErr_Format
(
PyExc_TypeError
,
"expected string or Unicode object, "
"%.200s found"
,
Py_TYPE
(
obj
)
->
tp_name
);
return
-1
;
}
}
*
s
=
PyString_AS_STRING
(
obj
);
if
(
len
!=
NULL
)
*
len
=
PyString_GET_SIZE
(
obj
);
else
if
(
strlen
(
*
s
)
!=
(
size_t
)
PyString_GET_SIZE
(
obj
)) {
PyErr_SetString
(
PyExc_TypeError
,
"expected string without null bytes"
);
return
-1
;
}
return
0
;
}
/* -------------------------------------------------------------------- */
/* Methods */
#include
"stringlib/stringdefs.h"
#include
"stringlib/fastsearch.h"
#include
"stringlib/count.h"
#include
"stringlib/find.h"
#include
"stringlib/partition.h"
#define
_Py_InsertThousandsGrouping
_PyString_InsertThousandsGrouping
#include
"stringlib/localeutil.h"
static
int
string_print
(
PyStringObject
*
op
,
FILE
*
fp
,
int
flags
)
{
Py_ssize_t
i
,
str_len
;
char
c
;
int
quote
;
/* XXX Ought to check for interrupts when writing long strings */
if
(!
PyString_CheckExact
(
op
)) {
int
ret
;
/* A str subclass may have its own __str__ method. */
op
=
(
PyStringObject
*
)
PyObject_Str
((
PyObject
*
)
op
);
if
(
op
==
NULL
)
return
-1
;
ret
=
string_print
(
op
,
fp
,
flags
);
Py_DECREF
(
op
);
return
ret
;
}
if
(
flags
&
Py_PRINT_RAW
) {
char
*
data
=
op
->
ob_sval
;
Py_ssize_t
size
=
Py_SIZE
(
op
);
Py_BEGIN_ALLOW_THREADS
while
(
size
>
INT_MAX
) {
/* Very long strings cannot be written atomically.
* But don't write exactly INT_MAX bytes at a time
* to avoid memory aligment issues.
*/
const
int
chunk_size
=
INT_MAX
&
~
0x3FFF
;
fwrite
(
data
,
1
,
chunk_size
,
fp
);
data
+=
chunk_size
;
size
-=
chunk_size
;
}
#ifdef
__VMS
if
(
size
)
fwrite
(
data
, (
int
)
size
,
1
,
fp
);
#else
fwrite
(
data
,
1
, (
int
)
size
,
fp
);
#endif
Py_END_ALLOW_THREADS
return
0
;
}
/* figure out which quote to use; single is preferred */
quote
=
'\''
;
if
(
memchr
(
op
->
ob_sval
,
'\''
,
Py_SIZE
(
op
))
&&
!
memchr
(
op
->
ob_sval
,
'"'
,
Py_SIZE
(
op
)))
quote
=
'"'
;
str_len
=
Py_SIZE
(
op
);
Py_BEGIN_ALLOW_THREADS
fputc
(
quote
,
fp
);
for
(
i
=
0
;
i
<
str_len
;
i
++
) {
/* Since strings are immutable and the caller should have a
reference, accessing the interal buffer should not be an issue
with the GIL released. */
c
=
op
->
ob_sval
[
i
];
if
(
c
==
quote
||
c
==
'\\'
)
fprintf
(
fp
,
"\\%c"
,
c
);
else
if
(
c
==
'\t'
)
fprintf
(
fp
,
"\\t"
);
else
if
(
c
==
'\n'
)
fprintf
(
fp
,
"\\n"
);
else
if
(
c
==
'\r'
)
fprintf
(
fp
,
"\\r"
);
else
if
(
c
<
' '
||
c
>=
0x7f
)
fprintf
(
fp
,
"\\x%02x"
,
c
&
0xff
);
else
fputc
(
c
,
fp
);
}
fputc
(
quote
,
fp
);
Py_END_ALLOW_THREADS
return
0
;
}
PyObject
*
PyString_Repr
(
PyObject
*
obj
,
int
smartquotes
)
{
register
PyStringObject
*
op
=
(
PyStringObject
*
)
obj
;
size_t
newsize
=
2
+
4
*
Py_SIZE
(
op
);
PyObject
*
v
;
if
(
newsize
>
PY_SSIZE_T_MAX
||
newsize
/
4
!=
Py_SIZE
(
op
)) {
PyErr_SetString
(
PyExc_OverflowError
,
"string is too large to make repr"
);
return
NULL
;
}
v
=
PyString_FromStringAndSize
((
char
*
)
NULL
,
newsize
);
if
(
v
==
NULL
) {
return
NULL
;
}
else
{
register
Py_ssize_t
i
;
register
char
c
;
register
char
*
p
;
int
quote
;
/* figure out which quote to use; single is preferred */
quote
=
'\''
;
if
(
smartquotes
&&
memchr
(
op
->
ob_sval
,
'\''
,
Py_SIZE
(
op
))
&&
!
memchr
(
op
->
ob_sval
,
'"'
,
Py_SIZE
(
op
)))
quote
=
'"'
;
p
=
PyString_AS_STRING
(
v
);
*
p
++
=
quote
;
for
(
i
=
0
;
i
<
Py_SIZE
(
op
);
i
++
) {
/* There's at least enough room for a hex escape
and a closing quote. */
assert
(
newsize
-
(
p
-
PyString_AS_STRING
(
v
)) >=
5
);
c
=
op
->
ob_sval
[
i
];
if
(
c
==
quote
||
c
==
'\\'
)
*
p
++
=
'\\'
,
*
p
++
=
c
;
else
if
(
c
==
'\t'
)
*
p
++
=
'\\'
,
*
p
++
=
't'
;
else
if
(
c
==
'\n'
)
*
p
++
=
'\\'
,
*
p
++
=
'n'
;
else
if
(
c
==
'\r'
)
*
p
++
=
'\\'
,
*
p
++
=
'r'
;
else
if
(
c
<
' '
||
c
>=
0x7f
) {
/* For performance, we don't want to call
PyOS_snprintf here (extra layers of
function call). */
sprintf
(
p
,
"\\x%02x"
,
c
&
0xff
);
p
+=
4
;
}
else
*
p
++
=
c
;
}
assert
(
newsize
-
(
p
-
PyString_AS_STRING
(
v
)) >=
1
);
*
p
++
=
quote
;
*
p
=
'\0'
;
_PyString_Resize
(
&
v
, (
p
-
PyString_AS_STRING
(
v
)));
return
v
;
}
}
static
PyObject
*
string_repr
(
PyObject
*
op
)
{
return
PyString_Repr
(
op
,
1
);
}
static
PyObject
*
string_str
(
PyObject
*
s
)
{
assert
(
PyString_Check
(
s
));
if
(
PyString_CheckExact
(
s
)) {
Py_INCREF
(
s
);
return
s
;
}
else
{
/* Subtype -- return genuine string with the same value. */
PyStringObject
*
t
=
(
PyStringObject
*
)
s
;
return
PyString_FromStringAndSize
(
t
->
ob_sval
,
Py_SIZE
(
t
));
}
}
static
Py_ssize_t
string_length
(
PyStringObject
*
a
)
{
return
Py_SIZE
(
a
);
}
static
PyObject
*
string_concat
(register
PyStringObject
*
a
, register
PyObject
*
bb
)
{
register
Py_ssize_t
size
;
register
PyStringObject
*
op
;
if
(!
PyString_Check
(
bb
)) {
#ifdef
Py_USING_UNICODE
if
(
PyUnicode_Check
(
bb
))
return
PyUnicode_Concat
((
PyObject
*
)
a
,
bb
);
#endif
if
(
PyByteArray_Check
(
bb
))
return
PyByteArray_Concat
((
PyObject
*
)
a
,
bb
);
PyErr_Format
(
PyExc_TypeError
,
"cannot concatenate 'str' and '%.200s' objects"
,
Py_TYPE
(
bb
)
->
tp_name
);
return
NULL
;
}
#define
b
((PyStringObject *)bb)
/* Optimize cases with empty left or right operand */
if
((
Py_SIZE
(
a
)
==
0
||
Py_SIZE
(
b
)
==
0
)
&&
PyString_CheckExact
(
a
)
&&
PyString_CheckExact
(
b
)) {
if
(
Py_SIZE
(
a
)
==
0
) {
Py_INCREF
(
bb
);
return
bb
;
}
Py_INCREF
(
a
);
return
(
PyObject
*
)
a
;
}
size
=
Py_SIZE
(
a
)
+
Py_SIZE
(
b
);
/* Check that string sizes are not negative, to prevent an
overflow in cases where we are passed incorrectly-created
strings with negative lengths (due to a bug in other code).
*/
if
(
Py_SIZE
(
a
)
<
0
||
Py_SIZE
(
b
)
<
0
||
Py_SIZE
(
a
)
>
PY_SSIZE_T_MAX
-
Py_SIZE
(
b
)) {
PyErr_SetString
(
PyExc_OverflowError
,
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