Stephen Hines | c6ca60f | 2023-05-09 02:19:22 -0700 | [diff] [blame^] | 1 | #ifndef Py_INTERNAL_ASDL_H |
| 2 | #define Py_INTERNAL_ASDL_H |
| 3 | #ifdef __cplusplus |
| 4 | extern "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 | |
| 13 | typedef PyObject * identifier; |
| 14 | typedef PyObject * string; |
| 15 | typedef PyObject * object; |
| 16 | typedef 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 | |
| 28 | typedef struct { |
| 29 | _ASDL_SEQ_HEAD |
| 30 | } asdl_seq; |
| 31 | |
| 32 | typedef struct { |
| 33 | _ASDL_SEQ_HEAD |
| 34 | void *typed_elements[1]; |
| 35 | } asdl_generic_seq; |
| 36 | |
| 37 | typedef struct { |
| 38 | _ASDL_SEQ_HEAD |
| 39 | PyObject *typed_elements[1]; |
| 40 | } asdl_identifier_seq; |
| 41 | |
| 42 | typedef struct { |
| 43 | _ASDL_SEQ_HEAD |
| 44 | int typed_elements[1]; |
| 45 | } asdl_int_seq; |
| 46 | |
| 47 | asdl_generic_seq *_Py_asdl_generic_seq_new(Py_ssize_t size, PyArena *arena); |
| 48 | asdl_identifier_seq *_Py_asdl_identifier_seq_new(Py_ssize_t size, PyArena *arena); |
| 49 | asdl_int_seq *_Py_asdl_int_seq_new(Py_ssize_t size, PyArena *arena); |
| 50 | |
| 51 | |
| 52 | #define GENERATE_ASDL_SEQ_CONSTRUCTOR(NAME, TYPE) \ |
| 53 | asdl_ ## 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) (S)->elements[(I)] |
| 82 | #define asdl_seq_GET(S, I) (S)->typed_elements[(I)] |
| 83 | #define asdl_seq_LEN(S) ((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) (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) (S)->elements[I] = (V) |
| 107 | #endif |
| 108 | |
| 109 | #ifdef __cplusplus |
| 110 | } |
| 111 | #endif |
| 112 | #endif /* !Py_INTERNAL_ASDL_H */ |