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83 lines
2.1 KiB
C
83 lines
2.1 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 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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/* Grammar subroutines needed by parser */
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#include "pgenheaders.h"
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#include "assert.h"
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#include "grammar.h"
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#include "token.h"
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/* Return the DFA for the given type */
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dfa *
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finddfa(g, type)
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grammar *g;
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register int type;
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{
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register dfa *d;
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#if 1
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/* Massive speed-up */
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d = &g->g_dfa[type - NT_OFFSET];
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assert(d->d_type == type);
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return d;
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#else
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/* Old, slow version */
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register int i;
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for (i = g->g_ndfas, d = g->g_dfa; --i >= 0; d++) {
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if (d->d_type == type)
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return d;
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}
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assert(0);
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/* NOTREACHED */
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#endif
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}
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char *
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labelrepr(lb)
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label *lb;
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{
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static char buf[100];
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if (lb->lb_type == ENDMARKER)
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return "EMPTY";
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else if (ISNONTERMINAL(lb->lb_type)) {
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if (lb->lb_str == NULL) {
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sprintf(buf, "NT%d", lb->lb_type);
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return buf;
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}
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else
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return lb->lb_str;
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}
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else {
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if (lb->lb_str == NULL)
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return tok_name[lb->lb_type];
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else {
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sprintf(buf, "%.32s(%.32s)",
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tok_name[lb->lb_type], lb->lb_str);
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return buf;
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}
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}
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}
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