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ac54d19eba
* src/derivation.h, src/derivation.c, * src/parse-simulation.h, src/parse-simulation.c: New.
108 lines
2.6 KiB
C
108 lines
2.6 KiB
C
/* Counterexample derivation trees
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Copyright (C) 2020 Free Software Foundation, Inc.
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This file is part of Bison, the GNU Compiler Compiler.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include <config.h>
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#include "derivation.h"
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#include "system.h"
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static derivation d_dot = { -1, NULL };
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const derivation *
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derivation_dot (void)
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{
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return &d_dot;
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}
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derivation *
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derivation_new (symbol_number sym, gl_list_t children)
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{
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derivation *deriv = xmalloc (sizeof (derivation));
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deriv->sym = sym;
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deriv->children = children;
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return deriv;
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}
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void
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derivation_free (derivation *d)
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{
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if (d && d != &d_dot)
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{
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if (d->children)
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gl_list_free (d->children);
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free (d);
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}
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}
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size_t
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derivation_size (const derivation *deriv)
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{
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if (!deriv->children)
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return 1;
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int size = 1;
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gl_list_iterator_t it = gl_list_iterator (deriv->children);
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derivation *child;
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while (gl_list_iterator_next (&it, (const void **) &child, NULL))
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size += derivation_size (child);
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return size;
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}
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// these are used rarely enough that I don't think they should be interned.
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void
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derivation_print (const derivation *deriv, FILE *f)
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{
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if (deriv == &d_dot)
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{
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fputs (" • ", f);
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return;
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}
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symbol *sym = symbols[deriv->sym];
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if (!deriv->children)
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{
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fprintf (f, " %s ", sym->tag);
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return;
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}
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gl_list_iterator_t it = gl_list_iterator (deriv->children);
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derivation *child;
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fprintf (f, " %s ::=[", sym->tag);
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while (gl_list_iterator_next (&it, (const void **) &child, NULL))
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derivation_print (child, f);
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fputs ("] ", f);
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}
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void
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derivation_print_leaves (const derivation *deriv, FILE *f)
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{
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if (deriv == &d_dot)
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{
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fputs (" • ", f);
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return;
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}
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if (!deriv->children)
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{
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symbol *sym = symbols[deriv->sym];
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fprintf (f, " %s ", sym->tag);
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return;
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}
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gl_list_iterator_t it = gl_list_iterator (deriv->children);
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derivation *child;
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while (gl_list_iterator_next (&it, (const void **) &child, NULL))
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derivation_print_leaves (child, f);
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}
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