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annotate anagram/agcore/configparam.h @ 23:cac4c76600eb

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author David A. Holland
date Mon, 13 Jun 2022 00:17:10 -0400
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1 /*
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2 * AnaGram, A System for Syntax Directed Programming
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3 * Copyright 1993-2002 Parsifal Software. All Rights Reserved.
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4 * See the file COPYING for license and usage terms.
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5 *
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6 * configparam.h - configuration parameter mechanism
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7 */
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8
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9 #ifndef CONFIGPARAM_H
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10 #define CONFIGPARAM_H
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11
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12 class ConfigParam {
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13 public:
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14
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15 class ErrorHandler {
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16 public:
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17 ErrorHandler() {}
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18 virtual ~ErrorHandler() {}
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19 virtual void badParam(const char *) = 0;
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20 };
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21
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22 const char *name;
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23
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24 ConfigParam(const char *n);
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25 virtual ~ConfigParam() {}
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26
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27 virtual void setIntegerValue(const int, ErrorHandler &);
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28 virtual void setStringValue(const AgString, ErrorHandler &);
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29 virtual void init() {}
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30 virtual void reset() = 0;
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31 virtual AgString asString() = 0;
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32
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33 static ConfigParam *table[];
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34 static int paramCount;
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35
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36 static void initAll();
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37 static void resetAll();
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38 static void set(int, ErrorHandler &);
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39 static void set(ErrorHandler &);
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40 };
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41
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42 template <class T>
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43 class Param : public ConfigParam {
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44 protected:
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45 T &parameter;
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46 T defaultValue;
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47 public:
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48 Param(const char *, T &);
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49 virtual void init();
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50 void reset();
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51 };
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52
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53 template <class T>
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54 void Param<T>::init() {
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55 defaultValue = parameter;
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56 }
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57
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58 template <class T>
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59 Param<T>::Param(const char *n, T &p)
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60 : ConfigParam(n), parameter(p), defaultValue(p)
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61 {}
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62
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63 template <class T>
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64 void Param<T>::reset() {
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65 parameter = defaultValue;
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66 }
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67
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68 class IntegerParam : public Param<int> {
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69 public:
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70 IntegerParam(const char *n, int &p) : Param<int>(n, p) {}
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71 virtual void setIntegerValue(const int, ErrorHandler &);
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72 virtual AgString asString();
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73 };
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74
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75 class StringParam : public Param<AgString> {
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76 public:
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77 StringParam(const char *n, AgString &p) : Param<AgString>(n, p) {}
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78 virtual void setStringValue(const AgString, ErrorHandler &);
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79 virtual AgString asString();
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80 };
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81
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82 class ConfigSwitch : public Param<int> {
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83 public:
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84 ConfigSwitch(const char *n, int &p) : Param<int>(n, p) {}
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85 virtual void setIntegerValue(const int, ErrorHandler &);
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86 virtual void setStringValue(const AgString, ErrorHandler &);
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87 virtual AgString asString();
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88 };
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89
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90 class TextParam : public Param<AgString> {
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91 public:
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92 TextParam(const char *n, AgString &p) : Param<AgString>(n, p) {}
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93 virtual void setStringValue(const AgString, ErrorHandler &);
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94 virtual AgString asString();
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95 };
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96
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97 class CastParam : public Param<int> {
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98 public:
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99 CastParam(const char *, int &);
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100 virtual void setStringValue(const AgString, ErrorHandler &e);
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101 virtual AgString asString();
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102 };
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103
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104 class TokenParam : public Param<int> {
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105 public:
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106 TokenParam(const char *, int &);
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107 virtual void setStringValue(const AgString, ErrorHandler &e);
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108 virtual AgString asString();
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109 };
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110
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111 #endif /* CONFIGPARAM_H */