1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
|
/* String object interface */
#ifndef Py_STRINGOBJECT_H
#define Py_STRINGOBJECT_H
#ifdef __cplusplus
extern "C" {
#endif
/*
Type PyStringObject represents a character string. An extra zero byte is
reserved at the end to ensure it is zero-terminated, but a size is
present so strings with null bytes in them can be represented. This
is an immutable object type.
There are functions to create new string objects, to test
an object for string-ness, and to get the
string value. The latter function returns a null pointer
if the object is not of the proper type.
There is a variant that takes an explicit size as well as a
variant that assumes a zero-terminated string. Note that none of the
functions should be applied to nil objects.
*/
/* Two speedup hacks. Caching the hash saves recalculation of a
string's hash value. Interning strings (which requires hash
caching) tries to ensure that only one string object with a given
value exists, so equality tests are one pointer comparison.
Together, these can speed the interpreter up by as much as 20%.
Each costs the size of a long or pointer per string object. In
addition, interned strings live until the end of times. If you are
concerned about memory footprint, simply comment the #define out
here (and rebuild everything!). */
#define CACHE_HASH
#ifdef CACHE_HASH
#define INTERN_STRINGS
#endif
typedef struct {
PyObject_VAR_HEAD
#ifdef CACHE_HASH
long ob_shash;
#endif
#ifdef INTERN_STRINGS
PyObject *ob_sinterned;
#endif
char ob_sval[1];
} PyStringObject;
extern DL_IMPORT(PyTypeObject) PyString_Type;
#define PyString_Check(op) ((op)->ob_type == &PyString_Type)
extern DL_IMPORT(PyObject *) PyString_FromStringAndSize(const char *, int);
extern DL_IMPORT(PyObject *) PyString_FromString(const char *);
extern DL_IMPORT(int) PyString_Size(PyObject *);
extern DL_IMPORT(char *) PyString_AsString(PyObject *);
extern DL_IMPORT(void) PyString_Concat(PyObject **, PyObject *);
extern DL_IMPORT(void) PyString_ConcatAndDel(PyObject **, PyObject *);
extern DL_IMPORT(int) _PyString_Resize(PyObject **, int);
extern DL_IMPORT(int) _PyString_Eq(PyObject *, PyObject*);
extern DL_IMPORT(PyObject *) PyString_Format(PyObject *, PyObject *);
extern DL_IMPORT(PyObject *) _PyString_FormatLong(PyObject*, int, int,
int, char**, int*);
#ifdef INTERN_STRINGS
extern DL_IMPORT(void) PyString_InternInPlace(PyObject **);
extern DL_IMPORT(PyObject *) PyString_InternFromString(const char *);
extern DL_IMPORT(void) _Py_ReleaseInternedStrings(void);
#else
#define PyString_InternInPlace(p)
#define PyString_InternFromString(cp) PyString_FromString(cp)
#define _Py_ReleaseInternedStrings()
#endif
/* Macro, trading safety for speed */
#define PyString_AS_STRING(op) (((PyStringObject *)(op))->ob_sval)
#define PyString_GET_SIZE(op) (((PyStringObject *)(op))->ob_size)
/* _PyString_Join(sep, x) is like sep.join(x). sep must be PyStringObject*,
x must be an iterable object. */
extern DL_IMPORT(PyObject *) _PyString_Join(PyObject *sep, PyObject *x);
/* --- Generic Codecs ----------------------------------------------------- */
/* Create an object by decoding the encoded string s of the
given size. */
extern DL_IMPORT(PyObject*) PyString_Decode(
const char *s, /* encoded string */
int size, /* size of buffer */
const char *encoding, /* encoding */
const char *errors /* error handling */
);
/* Encodes a char buffer of the given size and returns a
Python object. */
extern DL_IMPORT(PyObject*) PyString_Encode(
const char *s, /* string char buffer */
int size, /* number of chars to encode */
const char *encoding, /* encoding */
const char *errors /* error handling */
);
/* Encodes a string object and returns the result as Python
object. */
extern DL_IMPORT(PyObject*) PyString_AsEncodedObject(
PyObject *str, /* string object */
const char *encoding, /* encoding */
const char *errors /* error handling */
);
/* Encodes a string object and returns the result as Python string
object.
If the codec returns an Unicode object, the object is converted
back to a string using the default encoding.
DEPRECATED - use PyString_AsEncodedObject() instead. */
extern DL_IMPORT(PyObject*) PyString_AsEncodedString(
PyObject *str, /* string object */
const char *encoding, /* encoding */
const char *errors /* error handling */
);
/* Decodes a string object and returns the result as Python
object. */
extern DL_IMPORT(PyObject*) PyString_AsDecodedObject(
PyObject *str, /* string object */
const char *encoding, /* encoding */
const char *errors /* error handling */
);
/* Decodes a string object and returns the result as Python string
object.
If the codec returns an Unicode object, the object is converted
back to a string using the default encoding.
DEPRECATED - use PyString_AsDecodedObject() instead. */
extern DL_IMPORT(PyObject*) PyString_AsDecodedString(
PyObject *str, /* string object */
const char *encoding, /* encoding */
const char *errors /* error handling */
);
/* Provides access to the internal data buffer and size of a string
object or the default encoded version of an Unicode object. Passing
NULL as *len parameter will force the string buffer to be
0-terminated (passing a string with embedded NULL characters will
cause an exception). */
extern DL_IMPORT(int) PyString_AsStringAndSize(
register PyObject *obj, /* string or Unicode object */
register char **s, /* pointer to buffer variable */
register int *len /* pointer to length variable or NULL
(only possible for 0-terminated
strings) */
);
#ifdef __cplusplus
}
#endif
#endif /* !Py_STRINGOBJECT_H */
|
