1#ifndef Py_INTERNAL_ASDL_H
2#define Py_INTERNAL_ASDL_H
3#ifdef __cplusplus
4extern "C" {
5#endif
6
7#ifndef Py_BUILD_CORE
8#  error "this header requires Py_BUILD_CORE define"
9#endif
10
11#include "pycore_pyarena.h"       // _PyArena_Malloc()
12
13typedef PyObject * identifier;
14typedef PyObject * string;
15typedef PyObject * object;
16typedef PyObject * constant;
17
18/* It would be nice if the code generated by asdl_c.py was completely
19   independent of Python, but it is a goal the requires too much work
20   at this stage.  So, for example, I'll represent identifiers as
21   interned Python strings.
22*/
23
24#define _ASDL_SEQ_HEAD \
25    Py_ssize_t size;   \
26    void **elements;
27
28typedef struct {
29    _ASDL_SEQ_HEAD
30} asdl_seq;
31
32typedef struct {
33    _ASDL_SEQ_HEAD
34    void *typed_elements[1];
35} asdl_generic_seq;
36
37typedef struct {
38    _ASDL_SEQ_HEAD
39    PyObject *typed_elements[1];
40} asdl_identifier_seq;
41
42typedef struct {
43    _ASDL_SEQ_HEAD
44    int typed_elements[1];
45} asdl_int_seq;
46
47asdl_generic_seq *_Py_asdl_generic_seq_new(Py_ssize_t size, PyArena *arena);
48asdl_identifier_seq *_Py_asdl_identifier_seq_new(Py_ssize_t size, PyArena *arena);
49asdl_int_seq *_Py_asdl_int_seq_new(Py_ssize_t size, PyArena *arena);
50
51
52#define GENERATE_ASDL_SEQ_CONSTRUCTOR(NAME, TYPE) \
53asdl_ ## NAME ## _seq *_Py_asdl_ ## NAME ## _seq_new(Py_ssize_t size, PyArena *arena) \
54{ \
55    asdl_ ## NAME ## _seq *seq = NULL; \
56    size_t n; \
57    /* check size is sane */ \
58    if (size < 0 || \
59        (size && (((size_t)size - 1) > (SIZE_MAX / sizeof(void *))))) { \
60        PyErr_NoMemory(); \
61        return NULL; \
62    } \
63    n = (size ? (sizeof(TYPE *) * (size - 1)) : 0); \
64    /* check if size can be added safely */ \
65    if (n > SIZE_MAX - sizeof(asdl_ ## NAME ## _seq)) { \
66        PyErr_NoMemory(); \
67        return NULL; \
68    } \
69    n += sizeof(asdl_ ## NAME ## _seq); \
70    seq = (asdl_ ## NAME ## _seq *)_PyArena_Malloc(arena, n); \
71    if (!seq) { \
72        PyErr_NoMemory(); \
73        return NULL; \
74    } \
75    memset(seq, 0, n); \
76    seq->size = size; \
77    seq->elements = (void**)seq->typed_elements; \
78    return seq; \
79}
80
81#define asdl_seq_GET_UNTYPED(S, I) _Py_RVALUE((S)->elements[(I)])
82#define asdl_seq_GET(S, I) _Py_RVALUE((S)->typed_elements[(I)])
83#define asdl_seq_LEN(S) _Py_RVALUE(((S) == NULL ? 0 : (S)->size))
84
85#ifdef Py_DEBUG
86#  define asdl_seq_SET(S, I, V) \
87    do { \
88        Py_ssize_t _asdl_i = (I); \
89        assert((S) != NULL); \
90        assert(0 <= _asdl_i && _asdl_i < (S)->size); \
91        (S)->typed_elements[_asdl_i] = (V); \
92    } while (0)
93#else
94#  define asdl_seq_SET(S, I, V) _Py_RVALUE((S)->typed_elements[I] = (V))
95#endif
96
97#ifdef Py_DEBUG
98#  define asdl_seq_SET_UNTYPED(S, I, V) \
99    do { \
100        Py_ssize_t _asdl_i = (I); \
101        assert((S) != NULL); \
102        assert(0 <= _asdl_i && _asdl_i < (S)->size); \
103        (S)->elements[_asdl_i] = (V); \
104    } while (0)
105#else
106#  define asdl_seq_SET_UNTYPED(S, I, V) _Py_RVALUE((S)->elements[I] = (V))
107#endif
108
109#ifdef __cplusplus
110}
111#endif
112#endif /* !Py_INTERNAL_ASDL_H */
113