src/graphviz.h

   1 /* Output Graphviz specification of a state machine generated by Bison.
   2
   3    Copyright (C) 2006, 2010-2015, 2018 Free Software Foundation, Inc.
   4
   5    This file is part of Bison, the GNU Compiler Compiler.
   6
   7    This program is free software: you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation, either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 /* Written by Paul Eggert and Satya Kiran Popuri.  */
  21
  22 #ifndef GRAPHVIZ_H_
  23 # define GRAPHVIZ_H_
  24
  25 # include "state.h"
  26
  27 /** Begin a Dot graph.
  28  *
  29  * \param fout   output stream.
  30  */
  31 void start_graph (FILE *fout);
  32
  33 /** Output a Dot node.
  34  *
  35  * \param id     identifier of the node
  36  * \param label  human readable label of the node (no Dot escaping needed).
  37  * \param fout   output stream.
  38  */
  39 void output_node (int id, char const *label, FILE *fout);
  40
  41 /** Output a Dot edge.
  42  * \param source       id of the source node
  43  * \param destination  id of the target node
  44  * \param label        human readable label of the edge
  45  *                     (no Dot escaping needed).  Can be 0.
  46  * \param style        Dot style of the edge (e.g., "dotted" or "solid").
  47  * \param fout         output stream.
  48  */
  49 void output_edge (int source, int destination, char const *label,
  50                   char const *style, FILE *fout);
  51
  52 /** Output a reduction.
  53  * \param s            current state
  54  * \param reds         the set of reductions
  55  * \param fout         output stream.
  56  */
  57 void output_red (state const *s, reductions const *reds, FILE *fout);
  58
  59 /** End a Dot graph.
  60  *
  61  * \param fout  output stream.
  62  */
  63 void finish_graph (FILE *fout);
  64
  65 /** Escape a lookahead token.
  66  *
  67  * \param name         the token.
  68  */
  69 char const *escape (char const *name);
  70
  71 #endif /* ! GRAPHVIZ_H_ */