Mercurial > ~dholland > hg > ag > index.cgi
annotate anagram/agcore/ftpar.h @ 12:aab9ff6af791
Strengthen the build hack for non-DOS targets.
author | David A. Holland |
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date | Tue, 31 May 2022 00:58:42 -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 * ftpar.h |
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7 */ |
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8 |
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9 #ifndef FTPAR_H |
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10 #define FTPAR_H |
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11 |
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12 class Token; // from token.h |
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13 struct tsd; // from tsd.h |
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14 #include "agarray.h" |
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15 #include "agsignal.h" |
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16 #include "agstack.h" |
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17 #include "cint.h" |
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18 |
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19 |
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20 extern AgArray<unsigned> traceCounts; |
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21 |
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22 int precedes(cint a, cint b); |
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23 |
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24 |
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25 class FtParser { |
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26 public: |
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27 enum ProcessState { |
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28 ready, |
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29 running, |
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30 finished, |
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31 syntaxError, |
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32 unexpectedEndOfFile, |
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33 selectionRequired, |
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34 selectionError |
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35 }; |
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36 |
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37 class State { |
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38 public: |
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39 friend class FtParser; |
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40 friend class FtParserDc; |
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41 friend class FtParserReductionDc; |
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42 friend class FileTraceWindow; |
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43 friend class GTView; |
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44 friend class GTWindow; |
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45 friend class TokenMenuDc; |
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46 |
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47 int number; |
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48 int line, column, charPos; |
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49 const unsigned char *pointer; |
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50 unsigned token; |
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51 |
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52 public: |
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53 State(char *p) |
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54 : number(0) |
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55 , line(0) |
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56 , column(0) |
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57 , charPos(0) |
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58 , pointer((const unsigned char*) p) |
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59 , token(0) |
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60 {} |
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61 State() |
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62 : number(0) |
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63 , line(0) |
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64 , column(0) |
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65 , charPos(0) |
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66 , pointer(0) |
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67 , token(0) |
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68 {} |
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69 State(unsigned sn, unsigned tn) |
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70 : number(sn) |
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71 , line(0) |
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72 , column(0) |
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73 , charPos(0) |
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74 , pointer(0) |
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75 , token(tn) |
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76 {} |
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77 |
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78 cint position() { return cint(charPos,line); } |
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79 int operator < (const State &s) const { return number < s.number; } |
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80 }; |
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81 |
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82 struct Transaction { |
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83 int count; |
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84 State state; |
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85 |
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86 Transaction() : count(0) {} |
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87 Transaction(int c, State s) : count(c), state(s) {} |
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88 int operator < (const Transaction &t) const { return count < t.count; } |
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89 }; |
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90 |
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91 struct StackChanged { |
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92 int newSize; |
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93 StackChanged() : newSize(0) {} |
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94 StackChanged(int n) : newSize(n) {} |
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95 }; |
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96 |
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97 AgString text; |
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98 State state; |
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99 State reductionState; |
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100 |
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101 tsd *initialStack; |
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102 |
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103 AgStack<State> stateStack; |
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104 AgStack<State> auxStack; |
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105 AgStack<Transaction> transStack; |
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106 const unsigned char *lookAhead; |
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107 const unsigned char *endPointer; |
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108 unsigned inputToken; |
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109 int nNullShifts; |
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110 ProcessState processState; |
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111 static const char *processStateText[]; |
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112 |
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113 unsigned actionParameter; |
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114 |
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115 int ruleLength; |
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116 int ruleToReduce; |
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117 int reductionIndex; |
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118 int reductionSelection; |
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119 |
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120 //DcRef<FtParserDc> displayControl; |
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121 struct BroadcastStackChanged : public Broadcaster<StackChanged> { |
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122 FtParser &parser; |
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123 BroadcastStackChanged(FtParser &p) : parser(p) {} |
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124 void operator () (unsigned n) const { |
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125 broadcast(FtParser::StackChanged(n)); |
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126 } |
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127 }; |
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128 |
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129 BroadcastStackChanged stackChanged; |
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130 //DcRef<rule_stack_dc> ruleControl; |
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131 //tsd *itemStack; |
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132 |
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133 int testingKeyword; |
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134 |
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135 void track(void); |
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136 void dispatchReductionToken(); |
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137 |
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138 void shiftTerminal(); |
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139 void shiftTerminalAndAccept(void); |
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140 void shiftTerminalAndReduce(); |
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141 void reduce(void); |
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142 void skip(void); |
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143 void shiftNull(void); |
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144 void error(); |
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145 void accept(); |
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146 |
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147 int shiftNonterminalAndReduce(); |
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148 int shiftNonterminal(); |
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149 int shiftNonterminalAndAccept(); |
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150 |
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151 static void (FtParser::*terminalAction[11])(); |
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152 static int (FtParser::*nonterminalAction[4])(); |
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153 |
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154 Token keyToken(void); |
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155 void getToken(); |
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156 unsigned inspectToken(); |
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157 void completeReduction(int reductionToken); |
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158 void completeReduction(); |
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159 int validToken(unsigned, unsigned); |
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160 int validSelection(unsigned, unsigned); |
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161 void requestSelection(int actionParameter); |
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162 |
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163 public: |
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164 FtParser &parseTo(unsigned char *target); |
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165 FtParser &parseTo(cint *target); |
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166 FtParser &parse(const char *fragment); |
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167 FtParser &prime(const char *fragment); |
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168 FtParser &parse(); |
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169 void parseAction(); |
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170 void stepToken(unsigned); |
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171 void parseToken(unsigned); |
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172 |
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173 FtParser &step(); |
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174 FtParser &step(char *fragment); |
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175 FtParser &reset(); |
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176 cint location() { return cint(state.charPos, state.line); } |
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177 cint displayLocation() { return cint(state.column, state.line); } |
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178 |
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179 FtParser &ignoreKeyword(int k) { |
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180 testingKeyword = k; |
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181 return *this; |
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182 } |
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183 |
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184 tsd *x1x_new(); |
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185 |
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186 FtParser(AgString t); |
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187 FtParser(); |
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188 FtParser(tsd *initialStack_); |
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189 ~FtParser(); |
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190 }; |
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191 |
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192 |
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193 #endif /* FTPAR_H */ |