1 | /* emacs edit mode for this file is -*- C++ -*- */ |
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2 | |
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3 | /** |
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4 | * |
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5 | * @file cf_switches.h |
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6 | * |
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7 | * header to cf_switches.cc. |
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8 | * |
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9 | **/ |
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10 | |
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11 | |
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12 | #ifndef INCL_CF_SWITCHES_H |
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13 | #define INCL_CF_SWITCHES_H |
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14 | |
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15 | // #include "config.h" |
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16 | |
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17 | /** const int CFSwitchesMax |
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18 | * |
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19 | * const CFSwitchesMax - maximum number of switches. |
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20 | * |
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21 | **/ |
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22 | const int CFSwitchesMax = 8; |
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23 | |
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24 | /** class CFSwitches |
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25 | * |
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26 | * class CFSwitches - manages boolean switches. |
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27 | * |
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28 | * An object of class `CFSwitches' is simply an array of booleans |
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29 | * with some comfortable access methods (`On()', `isOn()', etc.). |
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30 | * Each object may contain `CFSwitchesMax' switches. When a new |
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31 | * object of type `CFSwitches' is created, all its switches are |
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32 | * turned off. |
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33 | * |
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34 | * Note: No range checking is done when accessing switches. |
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35 | * |
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36 | * switches: the switches |
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37 | * |
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38 | **/ |
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39 | class CFSwitches |
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40 | { |
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41 | private: |
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42 | bool switches [CFSwitchesMax]; |
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43 | |
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44 | CFSwitches (); |
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45 | public: |
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46 | // constructors, destructors |
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47 | ~CFSwitches () {} |
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48 | |
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49 | static inline CFSwitches& getInstance() |
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50 | { |
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51 | static CFSwitches singleton; |
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52 | return singleton; |
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53 | } |
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54 | // selectors |
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55 | /// switch 's' on |
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56 | void On ( int s ) { switches[s] = true; } |
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57 | /// switch 's' off |
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58 | void Off ( int s ) { switches[s] = false; } |
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59 | /// check if 's' is on |
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60 | bool isOn ( int s ) const { return switches[s]; } |
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61 | /// check if 's' is off |
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62 | bool isOff ( int s ) const { return ! switches[s]; } |
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63 | }; |
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64 | /** CFSwitches cf_glob_switches; |
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65 | * |
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66 | * cf_glob_switches - factory switches. |
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67 | * |
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68 | * This is the only object of type CFSwitches in factory. It is |
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69 | * used either directly in the low level algorithms or by the |
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70 | * functions On(), Off(), isOn() defined in canonicalform.cc. |
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71 | * |
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72 | **/ |
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73 | // extern CFSwitches& cf_glob_switches; |
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74 | // CFSwitches& cf_glob_switches = CFSwitches::getInstance(); |
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75 | #define cf_glob_switches (CFSwitches::getInstance()) |
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76 | |
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77 | #endif /* ! INCL_CF_SWITCHES_H */ |
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