Mercurial > cpython-lru_cache-weakref

annotate Parser/node.c @ 7278:59d2761ba1cf legacy-trunk

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Remove obsolete pagenumbering / pagestyle cruft.
author Fred Drake <fdrake@acm.org>
date Fri, 13 Feb 1998 07:08:56 +0000
parents 1c9a84e0981d
children 63436719d12e
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /***********************************************************
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2 Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
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3 The Netherlands.
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4
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5 All Rights Reserved
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6
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7 Permission to use, copy, modify, and distribute this software and its
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8 documentation for any purpose and without fee is hereby granted,
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9 provided that the above copyright notice appear in all copies and that
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10 both that copyright notice and this permission notice appear in
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11 supporting documentation, and that the names of Stichting Mathematisch
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12 Centrum or CWI or Corporation for National Research Initiatives or
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13 CNRI not be used in advertising or publicity pertaining to
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14 distribution of the software without specific, written prior
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15 permission.
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16
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17 While CWI is the initial source for this software, a modified version
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18 is made available by the Corporation for National Research Initiatives
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19 (CNRI) at the Internet address ftp://ftp.python.org.
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20
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21 STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
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22 REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
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23 MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
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24 CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
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25 DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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26 PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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27 TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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28 PERFORMANCE OF THIS SOFTWARE.
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29
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30 ******************************************************************/
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31
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32 /* Parse tree node implementation */
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33
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34 #include "pgenheaders.h"
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35 #include "node.h"
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36
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37 node *
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38 PyNode_New(type)
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39 int type;
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40 {
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41 node *n = PyMem_NEW(node, 1);
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42 if (n == NULL)
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43 return NULL;
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44 n->n_type = type;
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45 n->n_str = NULL;
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46 n->n_lineno = 0;
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47 n->n_nchildren = 0;
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48 n->n_child = NULL;
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49 return n;
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50 }
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51
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52 #define XXX 3 /* Node alignment factor to speed up realloc */
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53 #define XXXROUNDUP(n) ((n) == 1 ? 1 : ((n) + XXX - 1) / XXX * XXX)
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54
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55 node *
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56 PyNode_AddChild(n1, type, str, lineno)
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57 register node *n1;
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58 int type;
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59 char *str;
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60 int lineno;
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61 {
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62 register int nch = n1->n_nchildren;
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63 register int nch1 = nch+1;
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64 register node *n;
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65 if (XXXROUNDUP(nch) < nch1) {
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66 n = n1->n_child;
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67 nch1 = XXXROUNDUP(nch1);
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68 PyMem_RESIZE(n, node, nch1);
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69 if (n == NULL)
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70 return NULL;
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71 n1->n_child = n;
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72 }
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73 n = &n1->n_child[n1->n_nchildren++];
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74 n->n_type = type;
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75 n->n_str = str;
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76 n->n_lineno = lineno;
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77 n->n_nchildren = 0;
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78 n->n_child = NULL;
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79 return n;
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80 }
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81
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82 /* Forward */
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83 static void freechildren Py_PROTO((node *));
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86 void
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87 PyNode_Free(n)
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88 node *n;
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89 {
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90 if (n != NULL) {
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91 freechildren(n);
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92 PyMem_DEL(n);
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93 }
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94 }
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95
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96 static void
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97 freechildren(n)
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98 node *n;
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99 {
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100 int i;
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101 for (i = NCH(n); --i >= 0; )
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102 freechildren(CHILD(n, i));
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103 if (n->n_child != NULL)
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104 PyMem_DEL(n->n_child);
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105 if (STR(n) != NULL)
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106 PyMem_DEL(STR(n));
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107 }