Showing content from http://svn.python.org/projects/python/branches/pep-382/Python/asdl.c below:
#include "Python.h" #include "asdl.h" asdl_seq * asdl_seq_new(int size, PyArena *arena) { asdl_seq *seq = NULL; size_t n = (size ? (sizeof(void *) * (size - 1)) : 0); /* check size is sane */ if (size < 0 || size == INT_MIN || (size && ((size - 1) > (PY_SIZE_MAX / sizeof(void *))))) { PyErr_NoMemory(); return NULL; } /* check if size can be added safely */ if (n > PY_SIZE_MAX - sizeof(asdl_seq)) { PyErr_NoMemory(); return NULL; } n += sizeof(asdl_seq); seq = (asdl_seq *)PyArena_Malloc(arena, n); if (!seq) { PyErr_NoMemory(); return NULL; } memset(seq, 0, n); seq->size = size; return seq; } asdl_int_seq * asdl_int_seq_new(int size, PyArena *arena) { asdl_int_seq *seq = NULL; size_t n = (size ? (sizeof(void *) * (size - 1)) : 0); /* check size is sane */ if (size < 0 || size == INT_MIN || (size && ((size - 1) > (PY_SIZE_MAX / sizeof(void *))))) { PyErr_NoMemory(); return NULL; } /* check if size can be added safely */ if (n > PY_SIZE_MAX - sizeof(asdl_seq)) { PyErr_NoMemory(); return NULL; } n += sizeof(asdl_seq); seq = (asdl_int_seq *)PyArena_Malloc(arena, n); if (!seq) { PyErr_NoMemory(); return NULL; } memset(seq, 0, n); seq->size = size; return seq; }
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