Mercurial > cpython-lru_cache-weakref

annotate Parser/node.c @ 24042:63fbbed10714 legacy-trunk

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Simplify HTTPSConnection constructor. See discussion in SF bug 458463.
author Jeremy Hylton <jeremy@alum.mit.edu>
date Fri, 28 Jun 2002 23:38:14 +0000
parents fb6b51033c3b
children 21bd86e00bce 76e9a14fb7c5
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1fd64b3af760 Move down the INT_MAX logic, because HAVE_LIMITS_H was always undefined
Vladimir Marangozov <vladimir.marangozov@t-online.de>
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1 /* Parse tree node implementation */
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2
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3 #include "Python.h"
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4 #include "node.h"
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5 #include "errcode.h"
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6
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7 node *
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8 PyNode_New(int type)
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9 {
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10 node *n = PyMem_NEW(node, 1);
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11 if (n == NULL)
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12 return NULL;
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13 n->n_type = type;
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14 n->n_str = NULL;
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15 n->n_lineno = 0;
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16 n->n_nchildren = 0;
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17 n->n_child = NULL;
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18 return n;
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19 }
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20
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21 #define XXX 3 /* Node alignment factor to speed up realloc */
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22 #define XXXROUNDUP(n) ((n) == 1 ? 1 : ((n) + XXX - 1) / XXX * XXX)
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23
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24 int
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25 PyNode_AddChild(register node *n1, int type, char *str, int lineno)
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26 {
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27 register int nch = n1->n_nchildren;
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28 register int nch1 = nch+1;
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29 register node *n;
14147
21ec69a56228 Charles G. Waldman <cgw@fnal.gov>:
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30 if (nch == INT_MAX || nch < 0)
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31 return E_OVERFLOW;
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32 if (XXXROUNDUP(nch) < nch1) {
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33 n = n1->n_child;
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34 nch1 = XXXROUNDUP(nch1);
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35 PyMem_RESIZE(n, node, nch1);
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36 if (n == NULL)
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37 return E_NOMEM;
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38 n1->n_child = n;
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39 }
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40 n = &n1->n_child[n1->n_nchildren++];
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41 n->n_type = type;
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42 n->n_str = str;
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43 n->n_lineno = lineno;
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44 n->n_nchildren = 0;
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45 n->n_child = NULL;
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46 return 0;
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47 }
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48
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49 /* Forward */
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50 static void freechildren(node *);
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51
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52
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53 void
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54 PyNode_Free(node *n)
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55 {
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56 if (n != NULL) {
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57 freechildren(n);
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58 PyMem_DEL(n);
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59 }
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60 }
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61
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62 static void
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63 freechildren(node *n)
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64 {
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65 int i;
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66 for (i = NCH(n); --i >= 0; )
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67 freechildren(CHILD(n, i));
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68 if (n->n_child != NULL)
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69 PyMem_DEL(n->n_child);
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70 if (STR(n) != NULL)
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71 PyMem_DEL(STR(n));
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72 }