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1 ------------------------------------------------------------------------------
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2 -- --
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3 -- GNAT COMPILER COMPONENTS --
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4 -- --
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5 -- G E T _ S C O S --
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6 -- --
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7 -- B o d y --
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8 -- --
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145
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9 -- Copyright (C) 2009-2019, Free Software Foundation, Inc. --
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111
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10 -- --
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11 -- GNAT is free software; you can redistribute it and/or modify it under --
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12 -- terms of the GNU General Public License as published by the Free Soft- --
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13 -- ware Foundation; either version 3, or (at your option) any later ver- --
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14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
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17 -- for more details. You should have received a copy of the GNU General --
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18 -- Public License distributed with GNAT; see file COPYING3. If not, go to --
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19 -- http://www.gnu.org/licenses for a complete copy of the license. --
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20 -- --
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21 -- GNAT was originally developed by the GNAT team at New York University. --
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22 -- Extensive contributions were provided by Ada Core Technologies Inc. --
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23 -- --
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24 ------------------------------------------------------------------------------
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25
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26 pragma Ada_2005;
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27 -- This unit is not part of the compiler proper, it is used in tools that
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28 -- read SCO information from ALI files (Xcov and sco_test). Ada 2005
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29 -- constructs may therefore be used freely (and are indeed).
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30
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31 with Namet; use Namet;
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32 with SCOs; use SCOs;
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33 with Types; use Types;
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34
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35 with Ada.IO_Exceptions; use Ada.IO_Exceptions;
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36
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37 procedure Get_SCOs is
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38 Dnum : Nat;
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39 C : Character;
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40 Loc1 : Source_Location;
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41 Loc2 : Source_Location;
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42 Cond : Character;
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43 Dtyp : Character;
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44
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45 use ASCII;
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46 -- For CR/LF
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47
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48 function At_EOL return Boolean;
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49 -- Skips any spaces, then checks if we are the end of a line. If so,
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50 -- returns True (but does not skip over the EOL sequence). If not,
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51 -- then returns False.
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52
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53 procedure Check (C : Character);
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54 -- Checks that file is positioned at given character, and if so skips past
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55 -- it, If not, raises Data_Error.
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56
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57 function Get_Int return Int;
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58 -- On entry the file is positioned to a digit. On return, the file is
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59 -- positioned past the last digit, and the returned result is the decimal
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60 -- value read. Data_Error is raised for overflow (value greater than
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61 -- Int'Last), or if the initial character is not a digit.
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62
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63 procedure Get_Source_Location (Loc : out Source_Location);
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64 -- Reads a source location in the form line:col and places the source
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65 -- location in Loc. Raises Data_Error if the format does not match this
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66 -- requirement. Note that initial spaces are not skipped.
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67
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68 procedure Get_Source_Location_Range (Loc1, Loc2 : out Source_Location);
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69 -- Skips initial spaces, then reads a source location range in the form
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70 -- line:col-line:col and places the two source locations in Loc1 and Loc2.
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71 -- Raises Data_Error if format does not match this requirement.
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72
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73 procedure Skip_EOL;
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74 -- Called with the current character about to be read being LF or CR. Skips
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75 -- past CR/LF characters until either a non-CR/LF character is found, or
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76 -- the end of file is encountered.
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77
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78 procedure Skip_Spaces;
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79 -- Skips zero or more spaces at the current position, leaving the file
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80 -- positioned at the first non-blank character (or Types.EOF).
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81
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82 ------------
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83 -- At_EOL --
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84 ------------
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85
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86 function At_EOL return Boolean is
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87 begin
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88 Skip_Spaces;
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89 return Nextc = CR or else Nextc = LF;
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90 end At_EOL;
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91
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92 -----------
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93 -- Check --
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94 -----------
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95
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96 procedure Check (C : Character) is
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97 begin
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98 if Nextc = C then
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99 Skipc;
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100 else
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101 raise Data_Error;
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102 end if;
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103 end Check;
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104
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105 -------------
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106 -- Get_Int --
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107 -------------
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108
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109 function Get_Int return Int is
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110 Val : Int;
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111 C : Character;
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112
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113 begin
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114 C := Nextc;
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115 Val := 0;
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116
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117 if C not in '0' .. '9' then
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118 raise Data_Error;
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119 end if;
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120
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121 -- Loop to read digits of integer value
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122
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123 loop
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124 declare
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125 pragma Unsuppress (Overflow_Check);
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126 begin
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127 Val := Val * 10 + (Character'Pos (C) - Character'Pos ('0'));
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128 end;
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129
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130 Skipc;
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131 C := Nextc;
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132
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133 exit when C not in '0' .. '9';
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134 end loop;
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135
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136 return Val;
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137
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138 exception
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139 when Constraint_Error =>
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140 raise Data_Error;
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141 end Get_Int;
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142
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143 -------------------------
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144 -- Get_Source_Location --
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145 -------------------------
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146
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147 procedure Get_Source_Location (Loc : out Source_Location) is
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148 pragma Unsuppress (Range_Check);
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149 begin
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150 Loc.Line := Logical_Line_Number (Get_Int);
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151 Check (':');
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152 Loc.Col := Column_Number (Get_Int);
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153 exception
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154 when Constraint_Error =>
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155 raise Data_Error;
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156 end Get_Source_Location;
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157
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158 -------------------------------
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159 -- Get_Source_Location_Range --
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160 -------------------------------
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161
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162 procedure Get_Source_Location_Range (Loc1, Loc2 : out Source_Location) is
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163 begin
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164 Skip_Spaces;
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165 Get_Source_Location (Loc1);
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166 Check ('-');
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167 Get_Source_Location (Loc2);
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168 end Get_Source_Location_Range;
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169
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170 --------------
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171 -- Skip_EOL --
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172 --------------
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173
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174 procedure Skip_EOL is
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175 C : Character;
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176
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177 begin
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178 loop
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179 Skipc;
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180 C := Nextc;
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181 exit when C /= LF and then C /= CR;
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182 end loop;
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183 end Skip_EOL;
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184
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185 -----------------
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186 -- Skip_Spaces --
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187 -----------------
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188
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189 procedure Skip_Spaces is
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190 begin
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191 while Nextc = ' ' loop
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192 Skipc;
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193 end loop;
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194 end Skip_Spaces;
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195
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196 Buf : String (1 .. 32_768);
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197 N : Natural;
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198 -- Scratch buffer, and index into it
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199
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200 Nam : Name_Id;
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201
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202 -- Start of processing for Get_SCOs
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203
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204 begin
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205 SCOs.Initialize;
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206
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207 -- Loop through lines of SCO information
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208
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209 while Nextc = 'C' loop
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210 Skipc;
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211
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212 C := Getc;
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213
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214 -- Make sure first line is a header line
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215
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216 if SCO_Unit_Table.Last = 0 and then C /= ' ' then
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217 raise Data_Error;
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218 end if;
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219
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220 -- Otherwise dispatch on type of line
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221
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222 case C is
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223
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224 -- Header or instance table entry
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225
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226 when ' ' =>
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227
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228 -- Complete previous entry if any
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229
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230 if SCO_Unit_Table.Last /= 0 then
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231 SCO_Unit_Table.Table (SCO_Unit_Table.Last).To :=
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232 SCO_Table.Last;
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233 end if;
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234
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235 Skip_Spaces;
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236
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237 case Nextc is
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238
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239 -- Instance table entry
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240
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241 when 'i' =>
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242 declare
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243 Inum : SCO_Instance_Index;
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244 begin
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245 Skipc;
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246 Skip_Spaces;
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247
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248 Inum := SCO_Instance_Index (Get_Int);
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249 SCO_Instance_Table.Increment_Last;
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250 pragma Assert (SCO_Instance_Table.Last = Inum);
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251
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252 Skip_Spaces;
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253 declare
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254 SIE : SCO_Instance_Table_Entry
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255 renames SCO_Instance_Table.Table (Inum);
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256 begin
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257 SIE.Inst_Dep_Num := Get_Int;
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258 C := Getc;
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259 pragma Assert (C = '|');
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260 Get_Source_Location (SIE.Inst_Loc);
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261
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262 if At_EOL then
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263 SIE.Enclosing_Instance := 0;
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264 else
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265 Skip_Spaces;
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266 SIE.Enclosing_Instance :=
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267 SCO_Instance_Index (Get_Int);
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268 pragma Assert (SIE.Enclosing_Instance in
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269 SCO_Instance_Table.First
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270 .. SCO_Instance_Table.Last);
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271 end if;
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272 end;
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273 end;
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274
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275 -- Unit header
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276
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277 when '0' .. '9' =>
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278 -- Scan out dependency number and file name
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279
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280 Dnum := Get_Int;
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281
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282 Skip_Spaces;
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283
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284 N := 0;
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285 while Nextc > ' ' loop
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286 N := N + 1;
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287 Buf (N) := Getc;
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288 end loop;
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289
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290 -- Make new unit table entry (will fill in To later)
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291
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292 SCO_Unit_Table.Append (
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293 (File_Name => new String'(Buf (1 .. N)),
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294 File_Index => 0,
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295 Dep_Num => Dnum,
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296 From => SCO_Table.Last + 1,
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297 To => 0));
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298
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299 when others =>
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300 raise Program_Error;
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301 end case;
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302
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303 -- Statement entry
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304
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305 when 'S' | 's' =>
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306 declare
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307 Typ : Character;
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308 Key : Character;
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309
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310 begin
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311 Key := 'S';
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312
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313 -- If continuation, reset Last indication in last entry stored
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314 -- for previous CS or cs line.
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315
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316 if C = 's' then
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317 SCO_Table.Table (SCO_Table.Last).Last := False;
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318 end if;
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319
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320 -- Initialize to scan items on one line
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321
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322 Skip_Spaces;
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323
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324 -- Loop through items on one line
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325
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326 loop
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327 Nam := No_Name;
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328 Typ := Nextc;
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329
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330 case Typ is
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331 when '>' =>
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332
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333 -- Dominance marker may be present only at entry point
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334
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335 pragma Assert (Key = 'S');
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336
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337 Skipc;
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338 Key := '>';
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339 Typ := Getc;
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340
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341 -- Sanity check on dominance marker type indication
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342
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343 pragma Assert (Typ in 'A' .. 'Z');
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344
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345 when '1' .. '9' =>
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346 Typ := ' ';
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347
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348 when others =>
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349 Skipc;
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350 if Typ = 'P' or else Typ = 'p' then
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351 if Nextc not in '1' .. '9' then
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352 Name_Len := 0;
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353 loop
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354 Name_Len := Name_Len + 1;
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355 Name_Buffer (Name_Len) := Getc;
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356 exit when Nextc = ':';
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357 end loop;
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358
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359 Skipc; -- Past ':'
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360
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361 Nam := Name_Find;
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362 end if;
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363 end if;
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364 end case;
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365
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366 if Key = '>' and then Typ /= 'E' then
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367 Get_Source_Location (Loc1);
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368 Loc2 := No_Source_Location;
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369 else
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370 Get_Source_Location_Range (Loc1, Loc2);
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371 end if;
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372
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373 SCO_Table.Append
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374 ((C1 => Key,
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375 C2 => Typ,
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376 From => Loc1,
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377 To => Loc2,
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378 Last => At_EOL,
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379 Pragma_Sloc => No_Location,
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380 Pragma_Aspect_Name => Nam));
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381
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382 if Key = '>' then
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383 Key := 'S';
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384 end if;
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385
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386 exit when At_EOL;
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387 end loop;
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388 end;
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389
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390 -- Decision entry
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391
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392 when 'E' | 'G' | 'I' | 'P' | 'W' | 'X' | 'A' =>
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393 Dtyp := C;
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394
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395 if C = 'A' then
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396 Name_Len := 0;
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397 while Nextc /= ' ' loop
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398 Name_Len := Name_Len + 1;
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399 Name_Buffer (Name_Len) := Getc;
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400 end loop;
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401
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402 Nam := Name_Find;
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403
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404 else
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405 Nam := No_Name;
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406 end if;
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407
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408 Skip_Spaces;
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409
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410 -- Output header
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411
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412 declare
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413 Loc : Source_Location;
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414
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415 begin
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416 -- Acquire location information
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417
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418 if Dtyp = 'X' then
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419 Loc := No_Source_Location;
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420 else
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421 Get_Source_Location (Loc);
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422 end if;
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423
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424 SCO_Table.Append
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425 ((C1 => Dtyp,
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426 C2 => ' ',
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427 From => Loc,
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428 To => No_Source_Location,
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429 Last => False,
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430 Pragma_Aspect_Name => Nam,
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431 others => <>));
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432 end;
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433
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434 -- Loop through terms in complex expression
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435
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436 C := Nextc;
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437 while C /= CR and then C /= LF loop
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438 if C = 'c' or else C = 't' or else C = 'f' then
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439 Cond := C;
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440 Skipc;
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441 Get_Source_Location_Range (Loc1, Loc2);
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442 SCO_Table.Append
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443 ((C2 => Cond,
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444 From => Loc1,
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445 To => Loc2,
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446 Last => False,
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447 others => <>));
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448
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449 elsif C = '!' or else
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450 C = '&' or else
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451 C = '|'
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452 then
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453 Skipc;
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454
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455 declare
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456 Loc : Source_Location;
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457 begin
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458 Get_Source_Location (Loc);
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459 SCO_Table.Append
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460 ((C1 => C,
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461 From => Loc,
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462 Last => False,
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463 others => <>));
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464 end;
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465
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466 elsif C = ' ' then
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467 Skip_Spaces;
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468
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469 elsif C = 'T' or else C = 'F' then
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470
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471 -- Chaining indicator: skip for now???
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472
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473 declare
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474 Loc1, Loc2 : Source_Location;
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475 pragma Unreferenced (Loc1, Loc2);
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476 begin
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477 Skipc;
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478 Get_Source_Location_Range (Loc1, Loc2);
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479 end;
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480
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481 else
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482 raise Data_Error;
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483 end if;
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484
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485 C := Nextc;
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486 end loop;
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487
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488 -- Reset Last indication to True for last entry
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489
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490 SCO_Table.Table (SCO_Table.Last).Last := True;
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491
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492 -- No other SCO lines are possible
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493
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494 when others =>
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495 raise Data_Error;
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496 end case;
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497
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498 Skip_EOL;
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499 end loop;
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500
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501 -- Here with all SCO's stored, complete last SCO Unit table entry
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502
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503 SCO_Unit_Table.Table (SCO_Unit_Table.Last).To := SCO_Table.Last;
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504 end Get_SCOs;
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