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94988067b9
the number of children of a node exceeds the max possible value for the short that is used to count them. The Python runtime converts this parser error into the SyntaxError "expression too long."
113 lines
2.8 KiB
C
113 lines
2.8 KiB
C
/***********************************************************
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Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
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The Netherlands.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the names of Stichting Mathematisch
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Centrum or CWI or Corporation for National Research Initiatives or
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CNRI not be used in advertising or publicity pertaining to
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distribution of the software without specific, written prior
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permission.
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While CWI is the initial source for this software, a modified version
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is made available by the Corporation for National Research Initiatives
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(CNRI) at the Internet address ftp://ftp.python.org.
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STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
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REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
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CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
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DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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PERFORMANCE OF THIS SOFTWARE.
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******************************************************************/
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#include <limits.h>
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/* Parse tree node implementation */
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#include "pgenheaders.h"
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#include "node.h"
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#include "errcode.h"
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node *
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PyNode_New(type)
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int type;
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{
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node *n = PyMem_NEW(node, 1);
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if (n == NULL)
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return NULL;
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n->n_type = type;
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n->n_str = NULL;
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n->n_lineno = 0;
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n->n_nchildren = 0;
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n->n_child = NULL;
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return n;
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}
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#define XXX 3 /* Node alignment factor to speed up realloc */
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#define XXXROUNDUP(n) ((n) == 1 ? 1 : ((n) + XXX - 1) / XXX * XXX)
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int
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PyNode_AddChild(n1, type, str, lineno)
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register node *n1;
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int type;
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char *str;
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int lineno;
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{
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register int nch = n1->n_nchildren;
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register int nch1 = nch+1;
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register node *n;
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if (nch == SHRT_MAX || nch < 0)
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return E_OVERFLOW;
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if (XXXROUNDUP(nch) < nch1) {
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n = n1->n_child;
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nch1 = XXXROUNDUP(nch1);
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PyMem_RESIZE(n, node, nch1);
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if (n == NULL)
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return E_NOMEM;
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n1->n_child = n;
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}
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n = &n1->n_child[n1->n_nchildren++];
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n->n_type = type;
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n->n_str = str;
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n->n_lineno = lineno;
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n->n_nchildren = 0;
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n->n_child = NULL;
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return 0;
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}
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/* Forward */
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static void freechildren Py_PROTO((node *));
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void
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PyNode_Free(n)
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node *n;
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{
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if (n != NULL) {
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freechildren(n);
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PyMem_DEL(n);
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}
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}
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static void
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freechildren(n)
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node *n;
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{
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int i;
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for (i = NCH(n); --i >= 0; )
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freechildren(CHILD(n, i));
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if (n->n_child != NULL)
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PyMem_DEL(n->n_child);
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if (STR(n) != NULL)
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PyMem_DEL(STR(n));
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}
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