annotate anagram/agcore/cf.syn @ 6:607e3be6bad8

Adjust to the moving target called the C++ standard. Apparently nowadays it's not allowed to define an explicit copy constructor but not an assignment operator. Consequently, defining the explicit copy constructor in terms of the implicit/automatic assignment operator for general convenience no longer works. Add assignment operators. Caution: not tested with the IBM compiler, but there's no particular reason it shouldn't work.
author David A. Holland
date Mon, 30 May 2022 23:46:22 -0400
parents 13d2b8934445
children
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1 {
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2 /*
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3 * AnaGram, A System for Syntax Directed Programming
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4 * Copyright 1993-2002 Parsifal Software. All Rights Reserved.
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5 *
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6 * cf.syn - Configuration file module
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7 */
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8
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9 #include "port.h"
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10
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11 #include "agstring.h"
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12 #include "assert.h"
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13 #include "cf-defs.h"
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14 #include "cint.h"
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15 #include "config.h"
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16 #include "configparam.h"
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17 #include "error.h"
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18 #include "file.h"
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19 #include "operations.h"
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20 #include "stacks.h"
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21 #include "textfile.h"
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22
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23 //#define INCLUDE_LOGGING
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24 #include "log.h"
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25 }
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26
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27 [
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28 auto resynch
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29 context type = cint
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30 grammar token = config file
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31 ~declare pcb
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32 diagnose errors
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33 lines and columns
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34 line numbers
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35 ~allow macros
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36 line numbers
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37 error frame
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38 nest comments
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39 ~test range
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40 token names
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41 pointer input
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42 default token type = int
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43 parser file name = "#.cpp"
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44 line numbers path = "cf.syn"
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45 escape backslashes
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46 ]
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47
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48 any digit = digit + hex letter
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49 backslash = '\\'
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50 blank char = ' ' + '\t'
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51 carriage return = '\r'
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52 digit = '0-9'
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53 double quote = '"'
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54 eof = 0 + 26
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55 eol chars = newline + carriage return
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56 hex letter = 'a-f' + 'A-F'
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57 letter = 'a-z' + 'A-Z' + '_'
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58 newline = '\n'
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59 nonoctal digit = any digit - octal digit
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60 octal digit = '0-7'
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61 simple string char = ~eof - (any digit + double quote + backslash + eol chars)
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62 tab = '\t'
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63 vertical space = '\f' + '\v'
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64
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65 equals
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66 -> '=', space?
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67
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68 minus
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69 -> '-', space?
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70
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71 plus
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72 -> '+', space?
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73
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74 tilde
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75 -> '~', space?
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76
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77 left parenthesis
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78 -> '(', space?
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79
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80 right parenthesis
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81 -> ')', blank?...
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82
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83
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84 config file
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85 -> blank?..., [global parameter | end of line]/..., eof
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86
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87 (void) global parameter
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88 -> name =ConfigParam::set(1, cfErrorHandler); //cf_gp4(1);
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89 -> tilde, name =ConfigParam::set(0, cfErrorHandler); //cf_gp4(0);
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90 -> name, equals, data type =ConfigParam::set(cfErrorHandler); //cf_gp2();
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91 -> name, equals, keyword string =ConfigParam::set(cfErrorHandler); //cf_gp3();
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92 -> name, equals, number:n =ConfigParam::set(n, cfErrorHandler); //cf_gp5(n);
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93
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94 (void) data type
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95 -> name
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96 -> name, abstract declarator =concat_string();
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97
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98 (void) abstract declarator
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99 -> indirect data type
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100 -> direct abstract declarator
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101 -> indirect data type, direct abstract declarator =concat_string();
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102
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103
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104 (void) direct abstract declarator
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105 -> {left parenthesis =scs('('),0;}, abstract declarator,
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106 right parenthesis =concat_string(), acs(')');
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107
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108 (void) pointer
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109 -> star
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110 -> star, name =concat_string();
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111
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112 (void) star
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113 -> '*', blank?... =sss(" *");
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114
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115 (void) indirect data type
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116 -> pointer
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117 -> indirect data type, pointer =concat_string();
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118
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119 (void) name string
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120 -> letter:a =scs(a);
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121 -> name string, letter + digit :a =acs(a);
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122 -> name string, blank..., letter + digit :a =acs(' '), acs(a);
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123
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124 name
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125 -> name string, blank?...
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126
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127 blank
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128 -> blank char
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129 -> c comment
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130
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131 space
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132 -> blank...
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133 -> blank..., continuation
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134 -> continuation
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135
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136 continuation
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137 -> comment, next line
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138 -> next line
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139
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140 next line
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141 -> carriage return?, newline
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142 -> carriage return?, newline, blank...
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143
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144 white
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145 -> blank
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146 -> carriage return?, newline
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147 -> comment, carriage return?, newline
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148
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149 end of line
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150 -> comment, carriage return?, newline
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151 -> carriage return?, newline
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152 -> end of line, white
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153 -> end of line, vertical space //form feed
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154
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155 comment
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156 -> "//", ~eol chars & ~eof?...
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157
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158 decimal number
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159 -> '1-9':d =d - '0';
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160 -> decimal number:n, '0-9':d =10*n + d - '0';
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161
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162 octal number
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163 -> '0' =0;
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164 -> octal number:n, '0-7':d =8*n + d - '0';
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165
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166 hex number
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167 -> "0x" =0;
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168 -> "0X" =0;
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169 -> hex number:n, '0-9':d =16*n + d - '0';
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170 -> hex number:n, 'A-F' + 'a-f':d =16*n + (d&7) + 9;
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171
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172 simple number
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173 -> decimal number
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174 -> octal number
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175 -> hex number
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176
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177 number
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178 -> sign:s, simple number:n, blank?... =s*n;
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179
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180 sign
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181 -> plus? =1;
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182 -> minus =-1;
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183
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184 keyword string
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185 -> keyword string head, string, double quote, blank?...
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186
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187 string
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188 -> string A | string B | string C
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189
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190 (void) keyword string head
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191 -> double quote =ics();
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192
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193 string char
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194 -> simple string char
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195 -> escape sequence
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196
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197 escape sequence
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198 -> "\\a" ='\a';
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199 -> "\\b" ='\b';
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200 -> "\\f" ='\f';
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201 -> "\\n" ='\n';
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202 -> "\\r" ='\r';
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203 -> "\\t" ='\t';
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204 -> "\\v" ='\v';
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205 -> "\\\\" ='\\';
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206 -> "\\?" = '\?';
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207 -> "\\'" ='\'';
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208 -> "\\\"" ='"';
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209 -> three octal:n =n==0?cf_error("Null character in string"),0 : n;
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210
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211 one octal
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212 -> backslash, '0-7':n =n&7;
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213
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214 two octal
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215 -> one octal:n, '0-7':d = n*8 + (d&7);
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216
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217 three octal
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218 -> two octal:n, '0-7':d = n*8 + (d&7);
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219
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220 octal escape
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221 -> {one octal | two octal}:n =
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222 n==0?cf_error("Null character in string"),0 : n;
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223
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224 hex escape
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225 -> "\\x", hex number:n =n;
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226
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227 (void) string A
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228 -> string char:c =acs(c);
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229 -> any digit:c =acs(c);
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230 -> string, string char:c =acs(c);
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231 -> string A, any digit:c =acs(c);
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232 -> string B, nonoctal digit:c =acs(c);
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233
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234 (void) string B
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235 -> octal escape:n =acs(n);
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236 -> string, octal escape:n =acs(n);
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237
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238 (void) string C
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239 -> hex escape:n =acs(n);
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240 -> string, hex escape:n =acs(n);
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241
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242 (void) c comment
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243 -> c comment text, "*/"
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244
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245 (void) c comment text
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246 -> "/*"
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247 -> c comment text, ~eof
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248
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249 c comment, c comment text
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250 -> c comment text, c comment =
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251 { if (nest_comments) PCB.reduction_token = cf_c_comment_text_token; }
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252
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253 [
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254 hidden {
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255 left parenthesis, right parenthesis,
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256 pointer, indirect data type, name string,
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257 space, next line, sign, one octal, two octal, three octal,
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258 string A, string B, string C, c comment text, escape sequence,
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259 octal escape, hex escape, name string
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260 }
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261 ]
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262
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263 {
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264
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265 #define PARSER_STACK_OVERFLOW assert(0)
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266 #define REDUCTION_TOKEN_ERROR assert(0)
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267 #define SYNTAX_ERROR cf_syn_error()
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268 #define GET_CONTEXT CONTEXT.x = PCB.column, CONTEXT.y = PCB.line
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269
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270 static void cf_error(const char *, int = 1);
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271
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272 class CfErrorHandler : public ConfigParam::ErrorHandler {
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273 public:
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274 virtual ~CfErrorHandler() {}
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275 virtual void badParam(const char *s){cf_error(s);}
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276 } cfErrorHandler;
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277
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278
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279
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280 static cf_pcb_type cfcb;
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281 #define PCB cfcb
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282
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283 static AgString config_file;
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284
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285 static void read_one_config(const AgString &dir) {
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286 LOGSECTION("read_one_config");
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287 LOGV(dir);
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288
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289 char delim[2];
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290 delim[0] = PATH_DELIMITER;
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291 delim[1] = 0;
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292
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293 config_file = dir.concat(delim).concat("AnaGram.cfg");
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294 LOGV(config_file);
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295
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296 text_file tf(config_file);
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297 cfcb.pointer = input_base = (unsigned char *) tf;
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298 if (input_base) cf();
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299 }
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300
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301 void read_config(const AgString mydir) {
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302 LOGSECTION("read_config");
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303 LOGV(mydir);
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304 LOGV(work_dir_name);
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305
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306 read_one_config(mydir);
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307 read_one_config(work_dir_name);
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308 }
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309
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310 static void cf_error(const char *msg, int contextFlag) {
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311 int line, column;
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312 if (contextFlag) {
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313 line = CONTEXT.y;
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314 column = CONTEXT.x;
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315 }
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316 else {
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317 line = PCB.line;
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318 column = PCB.column;
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319 }
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320 errorList.push(Error(line, column, config_file, msg));
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321 }
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322
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323 static void cf_syn_error(void) {
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324 reset_stk();
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325 cf_error(PCB.error_message, 0);
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326 }
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327
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328 }