Include/node.h

   1 #ifndef Py_NODE_H
   2 #define Py_NODE_H
   3 #ifdef __cplusplus
   4 extern "C" {
   5 #endif
   6
   7 /***********************************************************
   8 Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
   9 The Netherlands.
  10
  11                         All Rights Reserved
  12
  13 Permission to use, copy, modify, and distribute this software and its
  14 documentation for any purpose and without fee is hereby granted,
  15 provided that the above copyright notice appear in all copies and that
  16 both that copyright notice and this permission notice appear in
  17 supporting documentation, and that the names of Stichting Mathematisch
  18 Centrum or CWI not be used in advertising or publicity pertaining to
  19 distribution of the software without specific, written prior permission.
  20
  21 STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
  22 THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
  23 FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
  24 FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  25 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  26 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
  27 OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  28
  29 ******************************************************************/
  30
  31 /* Parse tree node interface */
  32
  33 typedef struct _node {
  34         short           n_type;
  35         char            *n_str;
  36         short           n_lineno;
  37         short           n_nchildren;
  38         struct _node    *n_child;
  39 } node;
  40
  41 extern node *PyNode_New Py_PROTO((int type));
  42 extern node *PyNode_AddChild Py_PROTO((node *n, int type, char *str, int lineno));
  43 extern void PyNode_Free Py_PROTO((node *n));
  44
  45 /* Node access functions */
  46 #define NCH(n)          ((n)->n_nchildren)
  47 #define CHILD(n, i)     (&(n)->n_child[i])
  48 #define TYPE(n)         ((n)->n_type)
  49 #define STR(n)          ((n)->n_str)
  50
  51 /* Assert that the type of a node is what we expect */
  52 #ifndef DEBUG
  53 #define REQ(n, type) { /*pass*/ ; }
  54 #else
  55 #define REQ(n, type) \
  56         { if (TYPE(n) != (type)) { \
  57                 fprintf(stderr, "FATAL: node type %d, required %d\n", \
  58                         TYPE(n), type); \
  59                 abort(); \
  60         } }
  61 #endif
  62
  63 extern void PyNode_ListTree Py_PROTO((node *));
  64
  65 #ifdef __cplusplus
  66 }
  67 #endif
  68 #endif /* !Py_NODE_H */