cpython/Python/asdl.c at 3.7 · python/cpython · GitHub

Name: cpython/Python/asdl.c at 3.7 · python/cpython · GitHub
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#include"Python.h"
#include"asdl.h"

asdl_seq*
_Py_asdl_seq_new(Py_ssize_tsize, PyArena*arena)
{
asdl_seq*seq=NULL;
size_tn;

/* check size is sane */
if (size<0||
 (size&& (((size_t)size-1) > (SIZE_MAX / sizeof(void*))))) {
PyErr_NoMemory();
returnNULL;
 }
n= (size ? (sizeof(void*) * (size-1)) : 0);

/* check if size can be added safely */
if (n>SIZE_MAX-sizeof(asdl_seq)) {
PyErr_NoMemory();
returnNULL;
 }
n+=sizeof(asdl_seq);

seq= (asdl_seq*)PyArena_Malloc(arena, n);
if (!seq) {
PyErr_NoMemory();
returnNULL;
 }
memset(seq, 0, n);
seq->size=size;
returnseq;
}

asdl_int_seq*
_Py_asdl_int_seq_new(Py_ssize_tsize, PyArena*arena)
{
asdl_int_seq*seq=NULL;
size_tn;

/* check size is sane */
if (size<0||
 (size&& (((size_t)size-1) > (SIZE_MAX / sizeof(void*))))) {
PyErr_NoMemory();
returnNULL;
 }
n= (size ? (sizeof(void*) * (size-1)) : 0);

/* check if size can be added safely */
if (n>SIZE_MAX-sizeof(asdl_seq)) {
PyErr_NoMemory();
returnNULL;
 }
n+=sizeof(asdl_seq);

seq= (asdl_int_seq*)PyArena_Malloc(arena, n);
if (!seq) {
PyErr_NoMemory();
returnNULL;
 }
memset(seq, 0, n);
seq->size=size;
returnseq;
}