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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 -- S T Y L E S W --
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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) 1992-2019, 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 with Hostparm; use Hostparm;
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27 with Opt; use Opt;
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28 with Output; use Output;
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29
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30 package body Stylesw is
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31
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32 -- The following constant defines the default style options for -gnaty
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33
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34 Default_Style : constant String :=
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35 "3" & -- indentation level is 3
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36 "a" & -- check attribute casing
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37 "A" & -- check array attribute indexes
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38 "b" & -- check no blanks at end of lines
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39 "c" & -- check comment formats
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40 "e" & -- check end/exit labels present
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41 "f" & -- check no form/feeds vertical tabs in source
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42 "h" & -- check no horizontal tabs in source
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43 "i" & -- check if-then layout
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44 "k" & -- check casing rules for keywords
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45 "l" & -- check reference manual layout
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46 "m" & -- check line length <= 79 characters
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47 "n" & -- check casing of package Standard idents
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48 "p" & -- check pragma casing
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49 "r" & -- check casing for identifier references
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50 "s" & -- check separate subprogram specs present
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51 "t"; -- check token separation rules
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52
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53 -- The following constant defines the GNAT style options, showing them
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54 -- as additions to the standard default style check options.
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55
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56 GNAT_Style : constant String := Default_Style &
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57 "d" & -- check no DOS line terminators
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58 "I" & -- check mode IN
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59 "S" & -- check separate lines after THEN or ELSE
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60 "u" & -- check no unnecessary blank lines
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61 "x"; -- check extra parentheses around conditionals
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62
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63 -- Note: we intend GNAT_Style to also include the following, but we do
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64 -- not yet have the whole tool suite clean with respect to this.
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65
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66 -- "B" & -- check boolean operators
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67
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68 -------------------------------
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69 -- Reset_Style_Check_Options --
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70 -------------------------------
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71
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72 procedure Reset_Style_Check_Options is
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73 begin
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74 Style_Check_Indentation := 0;
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75 Style_Check_Array_Attribute_Index := False;
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76 Style_Check_Attribute_Casing := False;
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77 Style_Check_Blanks_At_End := False;
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78 Style_Check_Blank_Lines := False;
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79 Style_Check_Boolean_And_Or := False;
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80 Style_Check_Comments := False;
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81 Style_Check_DOS_Line_Terminator := False;
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82 Style_Check_Mixed_Case_Decls := False;
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83 Style_Check_End_Labels := False;
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84 Style_Check_Form_Feeds := False;
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85 Style_Check_Horizontal_Tabs := False;
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86 Style_Check_If_Then_Layout := False;
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87 Style_Check_Keyword_Casing := False;
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88 Style_Check_Layout := False;
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89 Style_Check_Max_Line_Length := False;
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90 Style_Check_Max_Nesting_Level := False;
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91 Style_Check_Missing_Overriding := False;
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92 Style_Check_Mode_In := False;
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93 Style_Check_Order_Subprograms := False;
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94 Style_Check_Pragma_Casing := False;
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95 Style_Check_References := False;
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96 Style_Check_Separate_Stmt_Lines := False;
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97 Style_Check_Specs := False;
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98 Style_Check_Standard := False;
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99 Style_Check_Tokens := False;
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100 Style_Check_Xtra_Parens := False;
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101 end Reset_Style_Check_Options;
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102
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103 ---------------------
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104 -- RM_Column_Check --
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105 ---------------------
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106
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107 function RM_Column_Check return Boolean is
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108 begin
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109 return Style_Check and Style_Check_Layout;
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110 end RM_Column_Check;
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111
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112 ------------------------------
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113 -- Save_Style_Check_Options --
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114 ------------------------------
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115
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116 procedure Save_Style_Check_Options (Options : out Style_Check_Options) is
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117 P : Natural := 0;
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118
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119 procedure Add (C : Character; S : Boolean);
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120 -- Add given character C to string if switch S is true
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121
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122 procedure Add_Nat (N : Nat);
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123 -- Add given natural number to string
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124
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125 ---------
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126 -- Add --
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127 ---------
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128
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129 procedure Add (C : Character; S : Boolean) is
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130 begin
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131 if S then
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132 P := P + 1;
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133 Options (P) := C;
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134 end if;
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135 end Add;
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136
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137 -------------
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138 -- Add_Nat --
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139 -------------
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140
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141 procedure Add_Nat (N : Nat) is
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142 begin
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143 if N > 9 then
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144 Add_Nat (N / 10);
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145 end if;
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146
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147 P := P + 1;
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148 Options (P) := Character'Val (Character'Pos ('0') + N mod 10);
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149 end Add_Nat;
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150
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151 -- Start of processing for Save_Style_Check_Options
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152
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153 begin
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154 Add (Character'Val (Style_Check_Indentation + Character'Pos ('0')),
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155 Style_Check_Indentation /= 0);
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156
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157 Add ('a', Style_Check_Attribute_Casing);
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158 Add ('A', Style_Check_Array_Attribute_Index);
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159 Add ('b', Style_Check_Blanks_At_End);
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160 Add ('B', Style_Check_Boolean_And_Or);
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161
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162 if Style_Check_Comments then
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163 if Style_Check_Comments_Spacing = 2 then
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164 Add ('c', Style_Check_Comments);
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131
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165 else
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166 pragma Assert (Style_Check_Comments_Spacing = 1);
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167 Add ('C', Style_Check_Comments);
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168 end if;
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169 end if;
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170
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171 Add ('d', Style_Check_DOS_Line_Terminator);
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172 Add ('D', Style_Check_Mixed_Case_Decls);
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173 Add ('e', Style_Check_End_Labels);
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174 Add ('f', Style_Check_Form_Feeds);
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175 Add ('h', Style_Check_Horizontal_Tabs);
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176 Add ('i', Style_Check_If_Then_Layout);
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177 Add ('I', Style_Check_Mode_In);
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178 Add ('k', Style_Check_Keyword_Casing);
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179 Add ('l', Style_Check_Layout);
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180 Add ('n', Style_Check_Standard);
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181 Add ('o', Style_Check_Order_Subprograms);
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182 Add ('O', Style_Check_Missing_Overriding);
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183 Add ('p', Style_Check_Pragma_Casing);
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184 Add ('r', Style_Check_References);
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185 Add ('s', Style_Check_Specs);
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186 Add ('S', Style_Check_Separate_Stmt_Lines);
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187 Add ('t', Style_Check_Tokens);
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188 Add ('u', Style_Check_Blank_Lines);
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189 Add ('x', Style_Check_Xtra_Parens);
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190
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191 if Style_Check_Max_Line_Length then
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192 P := P + 1;
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193 Options (P) := 'M';
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194 Add_Nat (Style_Max_Line_Length);
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195 end if;
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196
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197 if Style_Check_Max_Nesting_Level then
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198 P := P + 1;
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199 Options (P) := 'L';
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200 Add_Nat (Style_Max_Nesting_Level);
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201 end if;
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202
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203 pragma Assert (P <= Options'Last);
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204
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205 while P < Options'Last loop
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206 P := P + 1;
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207 Options (P) := ' ';
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208 end loop;
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209 end Save_Style_Check_Options;
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210
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211 -------------------------------------
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212 -- Set_Default_Style_Check_Options --
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213 -------------------------------------
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214
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215 procedure Set_Default_Style_Check_Options is
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216 begin
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217 Reset_Style_Check_Options;
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218 Set_Style_Check_Options (Default_Style);
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219 end Set_Default_Style_Check_Options;
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220
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221 ----------------------------------
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222 -- Set_GNAT_Style_Check_Options --
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223 ----------------------------------
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224
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225 procedure Set_GNAT_Style_Check_Options is
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226 begin
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227 Reset_Style_Check_Options;
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228 Set_Style_Check_Options (GNAT_Style);
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229 end Set_GNAT_Style_Check_Options;
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230
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231 -----------------------------
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232 -- Set_Style_Check_Options --
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233 -----------------------------
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234
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235 -- Version used when no error checking is required
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236
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237 procedure Set_Style_Check_Options (Options : String) is
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238 OK : Boolean;
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239 EC : Natural;
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240 pragma Warnings (Off, EC);
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241 begin
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242 Set_Style_Check_Options (Options, OK, EC);
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243 pragma Assert (OK);
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244 end Set_Style_Check_Options;
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245
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246 -- Normal version with error checking
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247
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248 procedure Set_Style_Check_Options
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249 (Options : String;
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250 OK : out Boolean;
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251 Err_Col : out Natural)
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252 is
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253 C : Character;
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254
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255 On : Boolean := True;
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256 -- Set to False if minus encountered
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257 -- Set to True if plus encountered
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258
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259 Last_Option : Character := ' ';
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260 -- Set to last character encountered
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261
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262 procedure Add_Img (N : Natural);
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263 -- Concatenates image of N at end of Style_Msg_Buf
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264
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265 procedure Bad_Style_Switch (Msg : String);
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266 -- Called if bad style switch found. Msg is set in Style_Msg_Buf and
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267 -- Style_Msg_Len. OK is set False.
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268
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269 -------------
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270 -- Add_Img --
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271 -------------
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272
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273 procedure Add_Img (N : Natural) is
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274 begin
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275 if N >= 10 then
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276 Add_Img (N / 10);
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277 end if;
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278
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279 Style_Msg_Len := Style_Msg_Len + 1;
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280 Style_Msg_Buf (Style_Msg_Len) :=
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281 Character'Val (N mod 10 + Character'Pos ('0'));
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282 end Add_Img;
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283
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284 ----------------------
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285 -- Bad_Style_Switch --
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286 ----------------------
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287
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288 procedure Bad_Style_Switch (Msg : String) is
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289 begin
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290 OK := False;
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291 Style_Msg_Len := Msg'Length;
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292 Style_Msg_Buf (1 .. Style_Msg_Len) := Msg;
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293 end Bad_Style_Switch;
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294
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295 -- Start of processing for Set_Style_Check_Options
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296
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297 begin
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298 Err_Col := Options'First;
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299 while Err_Col <= Options'Last loop
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300 C := Options (Err_Col);
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301 Last_Option := C;
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302 Err_Col := Err_Col + 1;
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303
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304 -- Turning switches on
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305
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306 if On then
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307 case C is
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308 when '+' =>
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309 null;
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310
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311 when '-' =>
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312 On := False;
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313
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314 when '0' .. '9' =>
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315 Style_Check_Indentation :=
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316 Character'Pos (C) - Character'Pos ('0');
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317
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318 when 'a' =>
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319 Style_Check_Attribute_Casing := True;
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320
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321 when 'A' =>
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322 Style_Check_Array_Attribute_Index := True;
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323
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324 when 'b' =>
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325 Style_Check_Blanks_At_End := True;
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326
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327 when 'B' =>
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328 Style_Check_Boolean_And_Or := True;
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329
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330 when 'c' =>
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331 Style_Check_Comments := True;
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332 Style_Check_Comments_Spacing := 2;
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333
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334 when 'C' =>
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335 Style_Check_Comments := True;
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336 Style_Check_Comments_Spacing := 1;
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337
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338 when 'd' =>
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339 Style_Check_DOS_Line_Terminator := True;
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340
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341 when 'D' =>
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342 Style_Check_Mixed_Case_Decls := True;
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343
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344 when 'e' =>
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345 Style_Check_End_Labels := True;
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346
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347 when 'f' =>
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348 Style_Check_Form_Feeds := True;
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349
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350 when 'g' =>
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351 Set_GNAT_Style_Check_Options;
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352
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353 when 'h' =>
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354 Style_Check_Horizontal_Tabs := True;
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355
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356 when 'i' =>
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357 Style_Check_If_Then_Layout := True;
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358
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359 when 'I' =>
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360 Style_Check_Mode_In := True;
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361
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362 when 'k' =>
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363 Style_Check_Keyword_Casing := True;
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364
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365 when 'l' =>
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366 Style_Check_Layout := True;
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367
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368 when 'L' =>
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369 Style_Max_Nesting_Level := 0;
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370
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371 if Err_Col > Options'Last
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372 or else Options (Err_Col) not in '0' .. '9'
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373 then
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374 Bad_Style_Switch ("invalid nesting level");
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375 return;
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376 end if;
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377
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378 loop
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379 Style_Max_Nesting_Level :=
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380 Style_Max_Nesting_Level * 10 +
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381 Character'Pos (Options (Err_Col)) - Character'Pos ('0');
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382
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383 if Style_Max_Nesting_Level > 999 then
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384 Bad_Style_Switch
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385 ("max nesting level (999) exceeded in style check");
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386 return;
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387 end if;
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388
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389 Err_Col := Err_Col + 1;
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390 exit when Err_Col > Options'Last
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391 or else Options (Err_Col) not in '0' .. '9';
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392 end loop;
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393
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394 Style_Check_Max_Nesting_Level := Style_Max_Nesting_Level /= 0;
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395
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396 when 'm' =>
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397 Style_Check_Max_Line_Length := True;
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398 Style_Max_Line_Length := 79;
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399
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400 when 'M' =>
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401 Style_Max_Line_Length := 0;
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402
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403 if Err_Col > Options'Last
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404 or else Options (Err_Col) not in '0' .. '9'
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405 then
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406 Bad_Style_Switch
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407 ("invalid line length in style check");
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408 return;
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409 end if;
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410
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411 loop
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412 Style_Max_Line_Length :=
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413 Style_Max_Line_Length * 10 +
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414 Character'Pos (Options (Err_Col)) - Character'Pos ('0');
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415
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416 if Style_Max_Line_Length > Int (Max_Line_Length) then
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417 OK := False;
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418 Style_Msg_Buf (1 .. 27) := "max line length allowed is ";
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419 Style_Msg_Len := 27;
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420 Add_Img (Natural (Max_Line_Length));
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421 return;
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422 end if;
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423
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424 Err_Col := Err_Col + 1;
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425 exit when Err_Col > Options'Last
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426 or else Options (Err_Col) not in '0' .. '9';
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427 end loop;
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428
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429 Style_Check_Max_Line_Length := Style_Max_Line_Length /= 0;
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430
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431 when 'n' =>
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432 Style_Check_Standard := True;
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433
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434 when 'N' =>
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435 Reset_Style_Check_Options;
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436
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437 when 'o' =>
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438 Style_Check_Order_Subprograms := True;
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439
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440 when 'O' =>
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441 Style_Check_Missing_Overriding := True;
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442
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443 when 'p' =>
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444 Style_Check_Pragma_Casing := True;
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445
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446 when 'r' =>
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447 Style_Check_References := True;
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448
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449 when 's' =>
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450 Style_Check_Specs := True;
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451
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452 when 'S' =>
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453 Style_Check_Separate_Stmt_Lines := True;
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454
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455 when 't' =>
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456 Style_Check_Tokens := True;
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457
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458 when 'u' =>
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459 Style_Check_Blank_Lines := True;
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460
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461 when 'x' =>
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462 Style_Check_Xtra_Parens := True;
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463
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464 when 'y' =>
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465 Set_Default_Style_Check_Options;
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466
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467 when ' ' =>
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468 null;
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469
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470 when others =>
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471 if Ignore_Unrecognized_VWY_Switches then
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472 Write_Line ("unrecognized switch -gnaty" & C & " ignored");
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473 else
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474 Err_Col := Err_Col - 1;
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475 Bad_Style_Switch ("invalid style switch");
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|
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476 return;
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477 end if;
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|
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478 end case;
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|
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479
|
|
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480 -- Turning switches off
|
|
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481
|
|
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482 else
|
|
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483 case C is
|
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484 when '+' =>
|
|
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485 On := True;
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|
|
486
|
|
|
487 when '-' =>
|
|
|
488 null;
|
|
|
489
|
|
|
490 when '0' .. '9' =>
|
|
|
491 Style_Check_Indentation := 0;
|
|
|
492
|
|
|
493 when 'a' =>
|
|
|
494 Style_Check_Attribute_Casing := False;
|
|
|
495
|
|
|
496 when 'A' =>
|
|
|
497 Style_Check_Array_Attribute_Index := False;
|
|
|
498
|
|
|
499 when 'b' =>
|
|
|
500 Style_Check_Blanks_At_End := False;
|
|
|
501
|
|
|
502 when 'B' =>
|
|
|
503 Style_Check_Boolean_And_Or := False;
|
|
|
504
|
|
|
505 when 'c' | 'C' =>
|
|
|
506 Style_Check_Comments := False;
|
|
|
507
|
|
|
508 when 'd' =>
|
|
|
509 Style_Check_DOS_Line_Terminator := False;
|
|
|
510
|
|
145
|
511 when 'D' =>
|
|
|
512 Style_Check_Mixed_Case_Decls := False;
|
|
|
513
|
|
111
|
514 when 'e' =>
|
|
|
515 Style_Check_End_Labels := False;
|
|
|
516
|
|
|
517 when 'f' =>
|
|
|
518 Style_Check_Form_Feeds := False;
|
|
|
519
|
|
|
520 when 'g' =>
|
|
|
521 Reset_Style_Check_Options;
|
|
|
522
|
|
|
523 when 'h' =>
|
|
|
524 Style_Check_Horizontal_Tabs := False;
|
|
|
525
|
|
|
526 when 'i' =>
|
|
|
527 Style_Check_If_Then_Layout := False;
|
|
|
528
|
|
|
529 when 'I' =>
|
|
|
530 Style_Check_Mode_In := False;
|
|
|
531
|
|
|
532 when 'k' =>
|
|
|
533 Style_Check_Keyword_Casing := False;
|
|
|
534
|
|
|
535 when 'l' =>
|
|
|
536 Style_Check_Layout := False;
|
|
|
537
|
|
|
538 when 'L' =>
|
|
|
539 Style_Max_Nesting_Level := 0;
|
|
|
540
|
|
|
541 when 'm' =>
|
|
|
542 Style_Check_Max_Line_Length := False;
|
|
|
543
|
|
|
544 when 'M' =>
|
|
|
545 Style_Max_Line_Length := 0;
|
|
|
546 Style_Check_Max_Line_Length := False;
|
|
|
547
|
|
|
548 when 'n' =>
|
|
|
549 Style_Check_Standard := False;
|
|
|
550
|
|
|
551 when 'o' =>
|
|
|
552 Style_Check_Order_Subprograms := False;
|
|
|
553
|
|
|
554 when 'O' =>
|
|
|
555 Style_Check_Missing_Overriding := False;
|
|
|
556
|
|
|
557 when 'p' =>
|
|
|
558 Style_Check_Pragma_Casing := False;
|
|
|
559
|
|
|
560 when 'r' =>
|
|
|
561 Style_Check_References := False;
|
|
|
562
|
|
|
563 when 's' =>
|
|
|
564 Style_Check_Specs := False;
|
|
|
565
|
|
|
566 when 'S' =>
|
|
|
567 Style_Check_Separate_Stmt_Lines := False;
|
|
|
568
|
|
|
569 when 't' =>
|
|
|
570 Style_Check_Tokens := False;
|
|
|
571
|
|
|
572 when 'u' =>
|
|
|
573 Style_Check_Blank_Lines := False;
|
|
|
574
|
|
|
575 when 'x' =>
|
|
|
576 Style_Check_Xtra_Parens := False;
|
|
|
577
|
|
|
578 when ' ' =>
|
|
|
579 null;
|
|
|
580
|
|
|
581 when others =>
|
|
|
582 if Ignore_Unrecognized_VWY_Switches then
|
|
|
583 Write_Line ("unrecognized switch -gnaty-" & C & " ignored");
|
|
|
584 else
|
|
|
585 Err_Col := Err_Col - 1;
|
|
|
586 Bad_Style_Switch ("invalid style switch");
|
|
|
587 return;
|
|
|
588 end if;
|
|
|
589 end case;
|
|
|
590 end if;
|
|
|
591 end loop;
|
|
|
592
|
|
|
593 -- Turn on style checking if other than N at end of string
|
|
|
594
|
|
|
595 Style_Check := (Last_Option /= 'N');
|
|
|
596 OK := True;
|
|
|
597 end Set_Style_Check_Options;
|
|
|
598 end Stylesw;
|
