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1 // Copyright (C) 1999,2000 Bruce Guenter <bruceg@em.ca> |
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2 // |
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3 // This program is free software; you can redistribute it and/or modify |
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4 // it under the terms of the GNU General Public License as published by |
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5 // the Free Software Foundation; either version 2 of the License, or |
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6 // (at your option) any later version. |
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7 // |
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8 // This program is distributed in the hope that it will be useful, |
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9 // but WITHOUT ANY WARRANTY; without even the implied warranty of |
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10 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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11 // GNU General Public License for more details. |
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12 // |
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13 // You should have received a copy of the GNU General Public License |
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14 // along with this program; if not, write to the Free Software |
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15 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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16 |
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17 #ifndef FDBUF__H__ |
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18 #define FDBUF__H__ |
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19 |
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20 #include "config.h" |
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21 #include <string.h> |
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22 #include <fcntl.h> |
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23 |
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24 #ifdef _REENTRANT |
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25 #include <pthread.h> |
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26 #endif |
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27 |
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28 #ifndef FDBUF_SIZE |
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29 #define FDBUF_SIZE 4096 |
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30 #endif |
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31 |
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32 class mystring; |
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33 |
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34 class fdbuf |
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35 { |
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36 public: |
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37 enum flagbits { flag_eof=1, flag_error=2, flag_closed=4 }; |
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38 |
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39 fdbuf(int fdesc, bool dc, unsigned bufsz = FDBUF_SIZE); |
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40 ~fdbuf(); |
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41 bool error() const; |
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42 bool closed() const; |
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43 bool close(); |
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44 #ifdef _REENTRANT |
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45 void lock() { pthread_mutex_lock(&mutex); } |
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46 void unlock() { pthread_mutex_unlock(&mutex); } |
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47 #else |
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48 #ifdef FDBUF_MUTEX_DEBUG |
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49 void lock(); |
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50 void unlock(); |
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51 #else |
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52 void lock() { } |
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53 void unlock() { } |
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54 #endif |
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55 #endif |
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56 protected: |
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57 char* const buf; |
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58 unsigned buflength; // Length of the data in the buffer |
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59 unsigned bufstart; // Start of the data in the buffer |
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60 unsigned offset; // Current file read/write offset |
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61 int errnum; // Saved error flag |
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62 unsigned flags; // Status flags |
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63 |
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64 const unsigned bufsize; // Total buffer size |
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65 const int fd; |
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66 const bool do_close; // True to close on destructor |
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67 |
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68 #ifdef _REENTRANT |
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69 pthread_mutex_t mutex; |
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70 #else |
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71 #ifdef FDBUF_MUTEX_DEBUG |
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72 unsigned mutex; |
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73 #endif |
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74 #endif |
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75 }; |
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76 |
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77 #include "fdbuf/fdibuf.h" |
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78 #include "fdbuf/fdobuf.h" |
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79 |
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80 bool fdbuf_copy(fdibuf&, fdobuf&, bool noflush = false); |
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81 |
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82 #endif // FDBUF__H__ |