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1 // dir-ops.h -*- C++ -*- |
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2 /* |
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3 |
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4 Copyright (C) 1996 John W. Eaton |
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5 |
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6 This file is part of Octave. |
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7 |
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8 Octave is free software; you can redistribute it and/or modify it |
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9 under the terms of the GNU General Public License as published by the |
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10 Free Software Foundation; either version 2, or (at your option) any |
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11 later version. |
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12 |
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13 Octave is distributed in the hope that it will be useful, but WITHOUT |
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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16 for more details. |
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17 |
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18 You should have received a copy of the GNU General Public License |
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19 along with Octave; see the file COPYING. If not, write to the Free |
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20 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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21 |
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22 */ |
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23 |
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24 #if !defined (octave_dir_ops_h) |
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25 #define octave_dir_ops_h 1 |
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26 |
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27 #include <string> |
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28 |
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29 #include "str-vec.h" |
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30 |
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31 struct DIR; |
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32 |
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33 class |
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34 dir_entry |
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35 { |
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36 public: |
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37 |
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38 dir_entry (const string& n = string ()) : name (n), dir (0) |
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39 { |
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40 if (! name.empty ()) |
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41 open (); |
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42 } |
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43 |
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44 dir_entry (const dir_entry& d) { copy (d); } |
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45 |
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46 dir_entry& operator = (const dir_entry& d) |
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47 { |
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48 copy (d); |
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49 return *this; |
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50 } |
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51 |
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52 ~dir_entry (void) { close (); } |
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53 |
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54 bool open (const string& = string ()); |
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55 |
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56 string_vector read (void); |
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57 |
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58 void close (void); |
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59 |
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60 bool ok (void) const { return dir && ! fail; } |
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61 |
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62 operator void* () const { return ok () ? (void *) -1 : (void *) 0; } |
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63 |
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64 string error (void) const { return ok () ? string () : errmsg; } |
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65 |
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66 private: |
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67 |
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68 // Name of the directory. |
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69 string name; |
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70 |
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71 // A pointer to the contents of the directory. |
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72 DIR *dir; |
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73 |
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74 // TRUE means the open for this directory failed. |
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75 bool fail; |
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76 |
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77 // If a failure occurs, this contains the system error text. |
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78 string errmsg; |
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79 |
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80 void copy (const dir_entry&); |
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81 }; |
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82 |
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83 #endif |
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84 |
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85 /* |
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86 ;;; Local Variables: *** |
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87 ;;; mode: C++ *** |
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88 ;;; page-delimiter: "^/\\*" *** |
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89 ;;; End: *** |
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90 */ |
