mirror of
https://github.com/python/cpython.git
synced 2025-11-04 03:44:55 +00:00
107 lines
2.7 KiB
C
107 lines
2.7 KiB
C
/***********************************************************
|
|
Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
|
|
The Netherlands.
|
|
|
|
All Rights Reserved
|
|
|
|
Permission to use, copy, modify, and distribute this software and its
|
|
documentation for any purpose and without fee is hereby granted,
|
|
provided that the above copyright notice appear in all copies and that
|
|
both that copyright notice and this permission notice appear in
|
|
supporting documentation, and that the names of Stichting Mathematisch
|
|
Centrum or CWI or Corporation for National Research Initiatives or
|
|
CNRI not be used in advertising or publicity pertaining to
|
|
distribution of the software without specific, written prior
|
|
permission.
|
|
|
|
While CWI is the initial source for this software, a modified version
|
|
is made available by the Corporation for National Research Initiatives
|
|
(CNRI) at the Internet address ftp://ftp.python.org.
|
|
|
|
STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
|
|
REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
|
|
MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
|
|
CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
|
|
DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
|
|
PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
|
|
TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
|
|
PERFORMANCE OF THIS SOFTWARE.
|
|
|
|
******************************************************************/
|
|
|
|
/* Parse tree node implementation */
|
|
|
|
#include "pgenheaders.h"
|
|
#include "node.h"
|
|
|
|
node *
|
|
PyNode_New(type)
|
|
int type;
|
|
{
|
|
node *n = PyMem_NEW(node, 1);
|
|
if (n == NULL)
|
|
return NULL;
|
|
n->n_type = type;
|
|
n->n_str = NULL;
|
|
n->n_lineno = 0;
|
|
n->n_nchildren = 0;
|
|
n->n_child = NULL;
|
|
return n;
|
|
}
|
|
|
|
#define XXX 3 /* Node alignment factor to speed up realloc */
|
|
#define XXXROUNDUP(n) ((n) == 1 ? 1 : ((n) + XXX - 1) / XXX * XXX)
|
|
|
|
node *
|
|
PyNode_AddChild(n1, type, str, lineno)
|
|
register node *n1;
|
|
int type;
|
|
char *str;
|
|
int lineno;
|
|
{
|
|
register int nch = n1->n_nchildren;
|
|
register int nch1 = nch+1;
|
|
register node *n;
|
|
if (XXXROUNDUP(nch) < nch1) {
|
|
n = n1->n_child;
|
|
nch1 = XXXROUNDUP(nch1);
|
|
PyMem_RESIZE(n, node, nch1);
|
|
if (n == NULL)
|
|
return NULL;
|
|
n1->n_child = n;
|
|
}
|
|
n = &n1->n_child[n1->n_nchildren++];
|
|
n->n_type = type;
|
|
n->n_str = str;
|
|
n->n_lineno = lineno;
|
|
n->n_nchildren = 0;
|
|
n->n_child = NULL;
|
|
return n;
|
|
}
|
|
|
|
/* Forward */
|
|
static void freechildren Py_PROTO((node *));
|
|
|
|
|
|
void
|
|
PyNode_Free(n)
|
|
node *n;
|
|
{
|
|
if (n != NULL) {
|
|
freechildren(n);
|
|
PyMem_DEL(n);
|
|
}
|
|
}
|
|
|
|
static void
|
|
freechildren(n)
|
|
node *n;
|
|
{
|
|
int i;
|
|
for (i = NCH(n); --i >= 0; )
|
|
freechildren(CHILD(n, i));
|
|
if (n->n_child != NULL)
|
|
PyMem_DEL(n->n_child);
|
|
if (STR(n) != NULL)
|
|
PyMem_DEL(STR(n));
|
|
}
|