Mercurial > cpython-lru_cache-weakref

annotate Python/asdl.c @ 86913:8c9769b17171 3.2

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Backout 7d399099334d.
author Georg Brandl <georg@python.org>
date Mon, 04 Nov 2013 07:44:29 +0100
parents cab14be0ada1
children f4d7ad6c9d6e
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1 #include "Python.h"
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2 #include "asdl.h"
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3
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4 asdl_seq *
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5 asdl_seq_new(int size, PyArena *arena)
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6 {
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7 asdl_seq *seq = NULL;
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8 size_t n = (size ? (sizeof(void *) * (size - 1)) : 0);
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9
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10 /* check size is sane */
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11 if (size < 0 || size == INT_MIN ||
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12 (size && ((size - 1) > (PY_SIZE_MAX / sizeof(void *))))) {
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13 PyErr_NoMemory();
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14 return NULL;
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15 }
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16
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17 /* check if size can be added safely */
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18 if (n > PY_SIZE_MAX - sizeof(asdl_seq)) {
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19 PyErr_NoMemory();
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20 return NULL;
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21 }
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22
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23 n += sizeof(asdl_seq);
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24
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25 seq = (asdl_seq *)PyArena_Malloc(arena, n);
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26 if (!seq) {
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27 PyErr_NoMemory();
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28 return NULL;
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29 }
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30 memset(seq, 0, n);
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31 seq->size = size;
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32 return seq;
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33 }
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34
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35 asdl_int_seq *
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36 asdl_int_seq_new(int size, PyArena *arena)
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37 {
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38 asdl_int_seq *seq = NULL;
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39 size_t n = (size ? (sizeof(void *) * (size - 1)) : 0);
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40
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41 /* check size is sane */
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42 if (size < 0 || size == INT_MIN ||
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43 (size && ((size - 1) > (PY_SIZE_MAX / sizeof(void *))))) {
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44 PyErr_NoMemory();
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45 return NULL;
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46 }
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47
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48 /* check if size can be added safely */
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49 if (n > PY_SIZE_MAX - sizeof(asdl_seq)) {
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50 PyErr_NoMemory();
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51 return NULL;
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52 }
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53
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54 n += sizeof(asdl_seq);
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55
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56 seq = (asdl_int_seq *)PyArena_Malloc(arena, n);
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57 if (!seq) {
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58 PyErr_NoMemory();
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59 return NULL;
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60 }
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61 memset(seq, 0, n);
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62 seq->size = size;
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63 return seq;
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64 }