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add hg and python

cinap_lenrek committed 15 years ago

Commit 4bb9e221 parent 987265c3706 files · +1228772 −-233Browse files

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1
2/* String object interface */
3
4#ifndef Py_STRINGOBJECT_H
5#define Py_STRINGOBJECT_H
6#ifdef __cplusplus
7extern "C" {
8#endif
9
10#include <stdarg.h>
11
12/*
13Type PyStringObject represents a character string. An extra zero byte is
14reserved at the end to ensure it is zero-terminated, but a size is
15present so strings with null bytes in them can be represented. This
16is an immutable object type.
17
18There are functions to create new string objects, to test
19an object for string-ness, and to get the
20string value. The latter function returns a null pointer
21if the object is not of the proper type.
22There is a variant that takes an explicit size as well as a
23variant that assumes a zero-terminated string. Note that none of the
24functions should be applied to nil objects.
25*/
26
27/* Caching the hash (ob_shash) saves recalculation of a string's hash value.
28 Interning strings (ob_sstate) tries to ensure that only one string
29 object with a given value exists, so equality tests can be one pointer
30 comparison. This is generally restricted to strings that "look like"
31 Python identifiers, although the intern() builtin can be used to force
32 interning of any string.
33 Together, these sped the interpreter by up to 20%. */
34
35typedef struct {
36 PyObject_VAR_HEAD
37 long ob_shash;
38 int ob_sstate;
39 char ob_sval[1];
40
41 /* Invariants:
42 * ob_sval contains space for 'ob_size+1' elements.
43 * ob_sval[ob_size] == 0.
44 * ob_shash is the hash of the string or -1 if not computed yet.
45 * ob_sstate != 0 iff the string object is in stringobject.c's
46 * 'interned' dictionary; in this case the two references
47 * from 'interned' to this object are *not counted* in ob_refcnt.
48 */
49} PyStringObject;
50
51#define SSTATE_NOT_INTERNED 0
52#define SSTATE_INTERNED_MORTAL 1
53#define SSTATE_INTERNED_IMMORTAL 2
54
55PyAPI_DATA(PyTypeObject) PyBaseString_Type;
56PyAPI_DATA(PyTypeObject) PyString_Type;
57
58#define PyString_Check(op) PyObject_TypeCheck(op, &PyString_Type)
59#define PyString_CheckExact(op) ((op)->ob_type == &PyString_Type)
60
61PyAPI_FUNC(PyObject *) PyString_FromStringAndSize(const char *, Py_ssize_t);
62PyAPI_FUNC(PyObject *) PyString_FromString(const char *);
63PyAPI_FUNC(PyObject *) PyString_FromFormatV(const char*, va_list)
64 Py_GCC_ATTRIBUTE((format(printf, 1, 0)));
65PyAPI_FUNC(PyObject *) PyString_FromFormat(const char*, ...)
66 Py_GCC_ATTRIBUTE((format(printf, 1, 2)));
67PyAPI_FUNC(Py_ssize_t) PyString_Size(PyObject *);
68PyAPI_FUNC(char *) PyString_AsString(PyObject *);
69PyAPI_FUNC(PyObject *) PyString_Repr(PyObject *, int);
70PyAPI_FUNC(void) PyString_Concat(PyObject **, PyObject *);
71PyAPI_FUNC(void) PyString_ConcatAndDel(PyObject **, PyObject *);
72PyAPI_FUNC(int) _PyString_Resize(PyObject **, Py_ssize_t);
73PyAPI_FUNC(int) _PyString_Eq(PyObject *, PyObject*);
74PyAPI_FUNC(PyObject *) PyString_Format(PyObject *, PyObject *);
75PyAPI_FUNC(PyObject *) _PyString_FormatLong(PyObject*, int, int,
76 int, char**, int*);
77PyAPI_FUNC(PyObject *) PyString_DecodeEscape(const char *, Py_ssize_t,
78 const char *, Py_ssize_t,
79 const char *);
80
81PyAPI_FUNC(void) PyString_InternInPlace(PyObject **);
82PyAPI_FUNC(void) PyString_InternImmortal(PyObject **);
83PyAPI_FUNC(PyObject *) PyString_InternFromString(const char *);
84PyAPI_FUNC(void) _Py_ReleaseInternedStrings(void);
85
86/* Use only if you know it's a string */
87#define PyString_CHECK_INTERNED(op) (((PyStringObject *)(op))->ob_sstate)
88
89/* Macro, trading safety for speed */
90#define PyString_AS_STRING(op) (((PyStringObject *)(op))->ob_sval)
91#define PyString_GET_SIZE(op) (((PyStringObject *)(op))->ob_size)
92
93/* _PyString_Join(sep, x) is like sep.join(x). sep must be PyStringObject*,
94 x must be an iterable object. */
95PyAPI_FUNC(PyObject *) _PyString_Join(PyObject *sep, PyObject *x);
96
97/* --- Generic Codecs ----------------------------------------------------- */
98
99/* Create an object by decoding the encoded string s of the
100 given size. */
101
102PyAPI_FUNC(PyObject*) PyString_Decode(
103 const char *s, /* encoded string */
104 Py_ssize_t size, /* size of buffer */
105 const char *encoding, /* encoding */
106 const char *errors /* error handling */
107 );
108
109/* Encodes a char buffer of the given size and returns a
110 Python object. */
111
112PyAPI_FUNC(PyObject*) PyString_Encode(
113 const char *s, /* string char buffer */
114 Py_ssize_t size, /* number of chars to encode */
115 const char *encoding, /* encoding */
116 const char *errors /* error handling */
117 );
118
119/* Encodes a string object and returns the result as Python
120 object. */
121
122PyAPI_FUNC(PyObject*) PyString_AsEncodedObject(
123 PyObject *str, /* string object */
124 const char *encoding, /* encoding */
125 const char *errors /* error handling */
126 );
127
128/* Encodes a string object and returns the result as Python string
129 object.
130
131 If the codec returns an Unicode object, the object is converted
132 back to a string using the default encoding.
133
134 DEPRECATED - use PyString_AsEncodedObject() instead. */
135
136PyAPI_FUNC(PyObject*) PyString_AsEncodedString(
137 PyObject *str, /* string object */
138 const char *encoding, /* encoding */
139 const char *errors /* error handling */
140 );
141
142/* Decodes a string object and returns the result as Python
143 object. */
144
145PyAPI_FUNC(PyObject*) PyString_AsDecodedObject(
146 PyObject *str, /* string object */
147 const char *encoding, /* encoding */
148 const char *errors /* error handling */
149 );
150
151/* Decodes a string object and returns the result as Python string
152 object.
153
154 If the codec returns an Unicode object, the object is converted
155 back to a string using the default encoding.
156
157 DEPRECATED - use PyString_AsDecodedObject() instead. */
158
159PyAPI_FUNC(PyObject*) PyString_AsDecodedString(
160 PyObject *str, /* string object */
161 const char *encoding, /* encoding */
162 const char *errors /* error handling */
163 );
164
165/* Provides access to the internal data buffer and size of a string
166 object or the default encoded version of an Unicode object. Passing
167 NULL as *len parameter will force the string buffer to be
168 0-terminated (passing a string with embedded NULL characters will
169 cause an exception). */
170
171PyAPI_FUNC(int) PyString_AsStringAndSize(
172 register PyObject *obj, /* string or Unicode object */
173 register char **s, /* pointer to buffer variable */
174 register Py_ssize_t *len /* pointer to length variable or NULL
175 (only possible for 0-terminated
176 strings) */
177 );
178
179
180#ifdef __cplusplus
181}
182#endif
183#endif /* !Py_STRINGOBJECT_H */