| 1 | /* emacs edit mode for this file is -*- C++ -*- */ |
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| 2 | |
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| 3 | #ifndef INCL_CF_SWITCHES_H |
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| 4 | #define INCL_CF_SWITCHES_H |
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| 5 | |
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| 6 | //{{{ docu |
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| 7 | // |
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| 8 | // cf_switches.h - header to cf_switches.cc. |
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| 9 | // |
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| 10 | //}}} |
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| 11 | |
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| 12 | // #include "config.h" |
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| 13 | |
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| 14 | //{{{ const int CFSwitchesMax |
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| 15 | //{{{ docu |
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| 16 | // |
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| 17 | // const CFSwitchesMax - maximum number of switches. |
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| 18 | // |
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| 19 | //}}} |
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| 20 | const int CFSwitchesMax = 8; |
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| 21 | //}}} |
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| 22 | |
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| 23 | //{{{ class CFSwitches |
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| 24 | //{{{ docu |
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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 | //{{{ inline method docu |
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| 40 | // |
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| 41 | // void On ( int s ) |
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| 42 | // void Off ( int s ) |
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| 43 | // bool isOn ( int s ) const |
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| 44 | // bool isOff ( int s ) const |
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| 45 | // |
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| 46 | // On(), Off() - switch `s' on or off, resp. |
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| 47 | // |
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| 48 | // isOn(), isOff() - return true iff `s' is on or off, resp. |
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| 49 | // |
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| 50 | //}}} |
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| 51 | class CFSwitches |
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| 52 | { |
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| 53 | private: |
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| 54 | bool switches [CFSwitchesMax]; |
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| 55 | |
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| 56 | CFSwitches (); |
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| 57 | public: |
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| 58 | // constructors, destructors |
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| 59 | ~CFSwitches () {} |
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| 60 | |
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| 61 | static inline CFSwitches& getInstance() |
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| 62 | { |
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| 63 | static CFSwitches singleton; |
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| 64 | return singleton; |
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| 65 | } |
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| 66 | // selectors |
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| 67 | void On ( int s ) { switches[s] = true; } |
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| 68 | void Off ( int s ) { switches[s] = false; } |
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| 69 | bool isOn ( int s ) const { return switches[s]; } |
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| 70 | bool isOff ( int s ) const { return ! switches[s]; } |
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| 71 | }; |
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| 72 | //}}} |
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| 73 | //{{{ CFSwitches cf_glob_switches; |
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| 74 | //{{{ docu |
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| 75 | // |
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| 76 | // cf_glob_switches - factory switches. |
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| 77 | // |
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| 78 | // This is the only object of type CFSwitches in factory. It is |
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| 79 | // used either directly in the low level algorithms or by the |
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| 80 | // functions On(), Off(), isOn() defined in canonicalform.cc. |
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| 81 | // |
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| 82 | //}}} |
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| 83 | // extern CFSwitches& cf_glob_switches; |
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| 84 | // CFSwitches& cf_glob_switches = CFSwitches::getInstance(); |
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| 85 | #define cf_glob_switches (CFSwitches::getInstance()) |
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| 86 | //}}} |
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| 87 | |
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| 88 | #endif /* ! INCL_CF_SWITCHES_H */ |
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