annotate src/comment-list.cc @ 8913:35cd375d4bb3

make tree::dup functions const
author John W. Eaton <jwe@octave.org>
date Thu, 05 Mar 2009 13:50:25 -0500
parents a1dbe9d80eee
children eb63fbe60fab
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1 /*
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2
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3 Copyright (C) 2000, 2001, 2002, 2004, 2005, 2006, 2007 John W. Eaton
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4
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5 This file is part of Octave.
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6
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7 Octave is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 3 of the License, or (at your
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10 option) any later version.
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11
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12 Octave is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with Octave; see the file COPYING. If not, see
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19 <http://www.gnu.org/licenses/>.
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20
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21 */
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22
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23 #ifdef HAVE_CONFIG_H
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24 #include <config.h>
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25 #endif
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26
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27 #include "lo-utils.h"
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28
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29 #include "comment-list.h"
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30 #include "error.h"
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31
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32 octave_comment_buffer *octave_comment_buffer::instance = 0;
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33
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34 octave_comment_list *
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35 octave_comment_list::dup (void) const
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36 {
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37 octave_comment_list *new_cl = new octave_comment_list ();
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38
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39 for (const_iterator p = begin (); p != end (); p++)
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40 {
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41 const octave_comment_elt elt = *p;
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42
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43 new_cl->append (elt);
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44 }
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45
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46 return new_cl;
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47 }
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48
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49 bool
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50 octave_comment_buffer::instance_ok (void)
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51 {
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52 bool retval = true;
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53
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54 if (! instance)
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55 instance = new octave_comment_buffer ();
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56
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57 if (! instance)
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58 {
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59 ::error ("unable to create comment buffer object");
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60
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61 retval = false;
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62 }
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63
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64 return retval;
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65 }
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66
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67 void
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68 octave_comment_buffer::append (const std::string& s,
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69 octave_comment_elt::comment_type t)
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70 {
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71 if (instance_ok ())
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72 instance->do_append (s, t);
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73 }
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74
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75 octave_comment_list *
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76 octave_comment_buffer::get_comment (void)
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77 {
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78 return (instance_ok ()) ? instance->do_get_comment () : 0;
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79 }
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80
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81 void
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82 octave_comment_buffer::do_append (const std::string& s,
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83 octave_comment_elt::comment_type t)
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84 {
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85 comment_list->append(s, t);
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86 }
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87
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88 octave_comment_list *
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89 octave_comment_buffer::do_get_comment (void)
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90 {
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91 octave_comment_list *retval = 0;
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92
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93 if (comment_list && comment_list->length () > 0)
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94 {
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95 retval = comment_list;
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96 comment_list = new octave_comment_list ();
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97 }
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98
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99 return retval;
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100 }
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101
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102 /*
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103 ;;; Local Variables: ***
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104 ;;; mode: C++ ***
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105 ;;; End: ***
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106 */