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) _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 */