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58 lines
2 KiB
C
58 lines
2 KiB
C
/***********************************************************
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Copyright 1991 by Stichting Mathematisch Centrum, Amsterdam, The
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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 not be used in advertising or publicity pertaining to
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distribution of the software without specific, written prior permission.
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STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
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THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
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FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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******************************************************************/
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/* Parse tree node interface */
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typedef struct _node {
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int n_type;
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char *n_str;
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int n_lineno;
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int n_nchildren;
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struct _node *n_child;
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} node;
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extern node *newtree PROTO((int type));
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extern node *addchild PROTO((node *n, int type, char *str, int lineno));
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extern void freetree PROTO((node *n));
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/* Node access functions */
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#define NCH(n) ((n)->n_nchildren)
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#define CHILD(n, i) (&(n)->n_child[i])
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#define TYPE(n) ((n)->n_type)
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#define STR(n) ((n)->n_str)
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/* Assert that the type of a node is what we expect */
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#ifndef DEBUG
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#define REQ(n, type) { /*pass*/ ; }
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#else
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#define REQ(n, type) \
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{ if (TYPE(n) != (type)) { \
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fprintf(stderr, "FATAL: node type %d, required %d\n", \
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TYPE(n), type); \
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abort(); \
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} }
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#endif
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extern void listtree PROTO((node *));
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extern void listnode PROTO((FILE *, node *));
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