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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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131
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9 -- Copyright (C) 1992-2018, 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_End_Labels := False;
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83 Style_Check_Form_Feeds := False;
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84 Style_Check_Horizontal_Tabs := False;
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85 Style_Check_If_Then_Layout := False;
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86 Style_Check_Keyword_Casing := False;
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87 Style_Check_Layout := False;
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88 Style_Check_Max_Line_Length := False;
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89 Style_Check_Max_Nesting_Level := False;
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90 Style_Check_Missing_Overriding := False;
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91 Style_Check_Mode_In := False;
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92 Style_Check_Order_Subprograms := False;
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93 Style_Check_Pragma_Casing := False;
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94 Style_Check_References := False;
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95 Style_Check_Separate_Stmt_Lines := False;
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96 Style_Check_Specs := False;
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97 Style_Check_Standard := False;
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98 Style_Check_Tokens := False;
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99 Style_Check_Xtra_Parens := False;
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100 end Reset_Style_Check_Options;
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101
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102 ---------------------
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103 -- RM_Column_Check --
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104 ---------------------
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105
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106 function RM_Column_Check return Boolean is
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107 begin
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108 return Style_Check and Style_Check_Layout;
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109 end RM_Column_Check;
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110
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111 ------------------------------
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112 -- Save_Style_Check_Options --
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113 ------------------------------
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114
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115 procedure Save_Style_Check_Options (Options : out Style_Check_Options) is
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116 P : Natural := 0;
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117
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118 procedure Add (C : Character; S : Boolean);
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119 -- Add given character C to string if switch S is true
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120
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121 procedure Add_Nat (N : Nat);
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122 -- Add given natural number to string
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123
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124 ---------
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125 -- Add --
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126 ---------
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127
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128 procedure Add (C : Character; S : Boolean) is
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129 begin
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130 if S then
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131 P := P + 1;
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132 Options (P) := C;
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133 end if;
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134 end Add;
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135
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136 -------------
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137 -- Add_Nat --
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138 -------------
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139
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140 procedure Add_Nat (N : Nat) is
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141 begin
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142 if N > 9 then
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143 Add_Nat (N / 10);
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144 end if;
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145
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146 P := P + 1;
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147 Options (P) := Character'Val (Character'Pos ('0') + N mod 10);
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148 end Add_Nat;
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149
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150 -- Start of processing for Save_Style_Check_Options
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151
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152 begin
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153 Add (Character'Val (Style_Check_Indentation + Character'Pos ('0')),
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154 Style_Check_Indentation /= 0);
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155
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156 Add ('a', Style_Check_Attribute_Casing);
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157 Add ('A', Style_Check_Array_Attribute_Index);
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158 Add ('b', Style_Check_Blanks_At_End);
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159 Add ('B', Style_Check_Boolean_And_Or);
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160
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161 if Style_Check_Comments then
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162 if Style_Check_Comments_Spacing = 2 then
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163 Add ('c', Style_Check_Comments);
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131
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164 else
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165 pragma Assert (Style_Check_Comments_Spacing = 1);
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111
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166 Add ('C', Style_Check_Comments);
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167 end if;
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168 end if;
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169
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170 Add ('d', Style_Check_DOS_Line_Terminator);
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171 Add ('e', Style_Check_End_Labels);
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172 Add ('f', Style_Check_Form_Feeds);
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173 Add ('h', Style_Check_Horizontal_Tabs);
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174 Add ('i', Style_Check_If_Then_Layout);
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175 Add ('I', Style_Check_Mode_In);
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176 Add ('k', Style_Check_Keyword_Casing);
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177 Add ('l', Style_Check_Layout);
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178 Add ('n', Style_Check_Standard);
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179 Add ('o', Style_Check_Order_Subprograms);
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180 Add ('O', Style_Check_Missing_Overriding);
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181 Add ('p', Style_Check_Pragma_Casing);
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182 Add ('r', Style_Check_References);
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183 Add ('s', Style_Check_Specs);
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184 Add ('S', Style_Check_Separate_Stmt_Lines);
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185 Add ('t', Style_Check_Tokens);
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186 Add ('u', Style_Check_Blank_Lines);
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187 Add ('x', Style_Check_Xtra_Parens);
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188
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189 if Style_Check_Max_Line_Length then
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190 P := P + 1;
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191 Options (P) := 'M';
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192 Add_Nat (Style_Max_Line_Length);
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193 end if;
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194
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195 if Style_Check_Max_Nesting_Level then
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196 P := P + 1;
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197 Options (P) := 'L';
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198 Add_Nat (Style_Max_Nesting_Level);
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199 end if;
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200
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201 pragma Assert (P <= Options'Last);
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202
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203 while P < Options'Last loop
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204 P := P + 1;
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205 Options (P) := ' ';
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206 end loop;
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207 end Save_Style_Check_Options;
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208
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209 -------------------------------------
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210 -- Set_Default_Style_Check_Options --
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211 -------------------------------------
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212
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213 procedure Set_Default_Style_Check_Options is
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214 begin
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215 Reset_Style_Check_Options;
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216 Set_Style_Check_Options (Default_Style);
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217 end Set_Default_Style_Check_Options;
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218
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219 ----------------------------------
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220 -- Set_GNAT_Style_Check_Options --
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221 ----------------------------------
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222
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223 procedure Set_GNAT_Style_Check_Options is
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224 begin
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225 Reset_Style_Check_Options;
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226 Set_Style_Check_Options (GNAT_Style);
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227 end Set_GNAT_Style_Check_Options;
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228
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229 -----------------------------
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230 -- Set_Style_Check_Options --
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231 -----------------------------
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232
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233 -- Version used when no error checking is required
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234
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235 procedure Set_Style_Check_Options (Options : String) is
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236 OK : Boolean;
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237 EC : Natural;
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238 pragma Warnings (Off, EC);
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239 begin
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240 Set_Style_Check_Options (Options, OK, EC);
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241 pragma Assert (OK);
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242 end Set_Style_Check_Options;
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243
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244 -- Normal version with error checking
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245
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246 procedure Set_Style_Check_Options
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247 (Options : String;
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248 OK : out Boolean;
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249 Err_Col : out Natural)
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250 is
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251 C : Character;
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252
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253 On : Boolean := True;
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254 -- Set to False if minus encountered
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255 -- Set to True if plus encountered
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256
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257 Last_Option : Character := ' ';
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258 -- Set to last character encountered
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259
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260 procedure Add_Img (N : Natural);
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261 -- Concatenates image of N at end of Style_Msg_Buf
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262
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263 procedure Bad_Style_Switch (Msg : String);
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264 -- Called if bad style switch found. Msg is set in Style_Msg_Buf and
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265 -- Style_Msg_Len. OK is set False.
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266
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267 -------------
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268 -- Add_Img --
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269 -------------
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270
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271 procedure Add_Img (N : Natural) is
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272 begin
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273 if N >= 10 then
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274 Add_Img (N / 10);
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275 end if;
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276
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277 Style_Msg_Len := Style_Msg_Len + 1;
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278 Style_Msg_Buf (Style_Msg_Len) :=
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279 Character'Val (N mod 10 + Character'Pos ('0'));
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280 end Add_Img;
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281
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282 ----------------------
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283 -- Bad_Style_Switch --
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284 ----------------------
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285
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286 procedure Bad_Style_Switch (Msg : String) is
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287 begin
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288 OK := False;
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289 Style_Msg_Len := Msg'Length;
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290 Style_Msg_Buf (1 .. Style_Msg_Len) := Msg;
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291 end Bad_Style_Switch;
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292
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293 -- Start of processing for Set_Style_Check_Options
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294
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295 begin
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296 Err_Col := Options'First;
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297 while Err_Col <= Options'Last loop
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298 C := Options (Err_Col);
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299 Last_Option := C;
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300 Err_Col := Err_Col + 1;
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301
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302 -- Turning switches on
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303
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304 if On then
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305 case C is
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306 when '+' =>
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307 null;
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308
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309 when '-' =>
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310 On := False;
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311
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312 when '0' .. '9' =>
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313 Style_Check_Indentation :=
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314 Character'Pos (C) - Character'Pos ('0');
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315
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316 when 'a' =>
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317 Style_Check_Attribute_Casing := True;
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318
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319 when 'A' =>
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320 Style_Check_Array_Attribute_Index := True;
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321
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322 when 'b' =>
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323 Style_Check_Blanks_At_End := True;
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324
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325 when 'B' =>
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326 Style_Check_Boolean_And_Or := True;
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327
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328 when 'c' =>
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329 Style_Check_Comments := True;
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330 Style_Check_Comments_Spacing := 2;
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331
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332 when 'C' =>
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333 Style_Check_Comments := True;
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334 Style_Check_Comments_Spacing := 1;
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335
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336 when 'd' =>
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337 Style_Check_DOS_Line_Terminator := True;
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338
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339 when 'e' =>
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340 Style_Check_End_Labels := True;
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341
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342 when 'f' =>
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343 Style_Check_Form_Feeds := True;
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344
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345 when 'g' =>
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346 Set_GNAT_Style_Check_Options;
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347
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348 when 'h' =>
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349 Style_Check_Horizontal_Tabs := True;
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350
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351 when 'i' =>
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352 Style_Check_If_Then_Layout := True;
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353
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354 when 'I' =>
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355 Style_Check_Mode_In := True;
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356
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357 when 'k' =>
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358 Style_Check_Keyword_Casing := True;
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359
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360 when 'l' =>
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361 Style_Check_Layout := True;
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362
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363 when 'L' =>
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364 Style_Max_Nesting_Level := 0;
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365
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366 if Err_Col > Options'Last
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367 or else Options (Err_Col) not in '0' .. '9'
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368 then
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369 Bad_Style_Switch ("invalid nesting level");
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370 return;
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371 end if;
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372
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373 loop
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374 Style_Max_Nesting_Level :=
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375 Style_Max_Nesting_Level * 10 +
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376 Character'Pos (Options (Err_Col)) - Character'Pos ('0');
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377
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378 if Style_Max_Nesting_Level > 999 then
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379 Bad_Style_Switch
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380 ("max nesting level (999) exceeded in style check");
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381 return;
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382 end if;
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383
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384 Err_Col := Err_Col + 1;
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385 exit when Err_Col > Options'Last
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386 or else Options (Err_Col) not in '0' .. '9';
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387 end loop;
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388
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389 Style_Check_Max_Nesting_Level := Style_Max_Nesting_Level /= 0;
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390
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391 when 'm' =>
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392 Style_Check_Max_Line_Length := True;
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393 Style_Max_Line_Length := 79;
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394
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395 when 'M' =>
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396 Style_Max_Line_Length := 0;
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397
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398 if Err_Col > Options'Last
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399 or else Options (Err_Col) not in '0' .. '9'
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400 then
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401 Bad_Style_Switch
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402 ("invalid line length in style check");
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403 return;
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404 end if;
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405
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406 loop
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407 Style_Max_Line_Length :=
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408 Style_Max_Line_Length * 10 +
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409 Character'Pos (Options (Err_Col)) - Character'Pos ('0');
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410
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411 if Style_Max_Line_Length > Int (Max_Line_Length) then
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412 OK := False;
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413 Style_Msg_Buf (1 .. 27) := "max line length allowed is ";
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414 Style_Msg_Len := 27;
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415 Add_Img (Natural (Max_Line_Length));
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416 return;
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417 end if;
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418
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419 Err_Col := Err_Col + 1;
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420 exit when Err_Col > Options'Last
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421 or else Options (Err_Col) not in '0' .. '9';
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422 end loop;
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423
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424 Style_Check_Max_Line_Length := Style_Max_Line_Length /= 0;
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425
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426 when 'n' =>
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427 Style_Check_Standard := True;
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428
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429 when 'N' =>
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430 Reset_Style_Check_Options;
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431
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432 when 'o' =>
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433 Style_Check_Order_Subprograms := True;
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434
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435 when 'O' =>
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436 Style_Check_Missing_Overriding := True;
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437
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438 when 'p' =>
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439 Style_Check_Pragma_Casing := True;
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440
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441 when 'r' =>
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442 Style_Check_References := True;
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443
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444 when 's' =>
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445 Style_Check_Specs := True;
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446
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447 when 'S' =>
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448 Style_Check_Separate_Stmt_Lines := True;
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449
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450 when 't' =>
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451 Style_Check_Tokens := True;
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452
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453 when 'u' =>
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454 Style_Check_Blank_Lines := True;
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455
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456 when 'x' =>
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457 Style_Check_Xtra_Parens := True;
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458
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459 when 'y' =>
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460 Set_Default_Style_Check_Options;
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461
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462 when ' ' =>
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463 null;
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464
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465 when others =>
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466 if Ignore_Unrecognized_VWY_Switches then
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467 Write_Line ("unrecognized switch -gnaty" & C & " ignored");
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468 else
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469 Err_Col := Err_Col - 1;
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470 Bad_Style_Switch ("invalid style switch");
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471 return;
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472 end if;
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473 end case;
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474
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475 -- Turning switches off
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476
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477 else
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|
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478 case C is
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479 when '+' =>
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|
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480 On := True;
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|
|
481
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|
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482 when '-' =>
|
|
|
483 null;
|
|
|
484
|
|
|
485 when '0' .. '9' =>
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|
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486 Style_Check_Indentation := 0;
|
|
|
487
|
|
|
488 when 'a' =>
|
|
|
489 Style_Check_Attribute_Casing := False;
|
|
|
490
|
|
|
491 when 'A' =>
|
|
|
492 Style_Check_Array_Attribute_Index := False;
|
|
|
493
|
|
|
494 when 'b' =>
|
|
|
495 Style_Check_Blanks_At_End := False;
|
|
|
496
|
|
|
497 when 'B' =>
|
|
|
498 Style_Check_Boolean_And_Or := False;
|
|
|
499
|
|
|
500 when 'c' | 'C' =>
|
|
|
501 Style_Check_Comments := False;
|
|
|
502
|
|
|
503 when 'd' =>
|
|
|
504 Style_Check_DOS_Line_Terminator := False;
|
|
|
505
|
|
|
506 when 'e' =>
|
|
|
507 Style_Check_End_Labels := False;
|
|
|
508
|
|
|
509 when 'f' =>
|
|
|
510 Style_Check_Form_Feeds := False;
|
|
|
511
|
|
|
512 when 'g' =>
|
|
|
513 Reset_Style_Check_Options;
|
|
|
514
|
|
|
515 when 'h' =>
|
|
|
516 Style_Check_Horizontal_Tabs := False;
|
|
|
517
|
|
|
518 when 'i' =>
|
|
|
519 Style_Check_If_Then_Layout := False;
|
|
|
520
|
|
|
521 when 'I' =>
|
|
|
522 Style_Check_Mode_In := False;
|
|
|
523
|
|
|
524 when 'k' =>
|
|
|
525 Style_Check_Keyword_Casing := False;
|
|
|
526
|
|
|
527 when 'l' =>
|
|
|
528 Style_Check_Layout := False;
|
|
|
529
|
|
|
530 when 'L' =>
|
|
|
531 Style_Max_Nesting_Level := 0;
|
|
|
532
|
|
|
533 when 'm' =>
|
|
|
534 Style_Check_Max_Line_Length := False;
|
|
|
535
|
|
|
536 when 'M' =>
|
|
|
537 Style_Max_Line_Length := 0;
|
|
|
538 Style_Check_Max_Line_Length := False;
|
|
|
539
|
|
|
540 when 'n' =>
|
|
|
541 Style_Check_Standard := False;
|
|
|
542
|
|
|
543 when 'o' =>
|
|
|
544 Style_Check_Order_Subprograms := False;
|
|
|
545
|
|
|
546 when 'O' =>
|
|
|
547 Style_Check_Missing_Overriding := False;
|
|
|
548
|
|
|
549 when 'p' =>
|
|
|
550 Style_Check_Pragma_Casing := False;
|
|
|
551
|
|
|
552 when 'r' =>
|
|
|
553 Style_Check_References := False;
|
|
|
554
|
|
|
555 when 's' =>
|
|
|
556 Style_Check_Specs := False;
|
|
|
557
|
|
|
558 when 'S' =>
|
|
|
559 Style_Check_Separate_Stmt_Lines := False;
|
|
|
560
|
|
|
561 when 't' =>
|
|
|
562 Style_Check_Tokens := False;
|
|
|
563
|
|
|
564 when 'u' =>
|
|
|
565 Style_Check_Blank_Lines := False;
|
|
|
566
|
|
|
567 when 'x' =>
|
|
|
568 Style_Check_Xtra_Parens := False;
|
|
|
569
|
|
|
570 when ' ' =>
|
|
|
571 null;
|
|
|
572
|
|
|
573 when others =>
|
|
|
574 if Ignore_Unrecognized_VWY_Switches then
|
|
|
575 Write_Line ("unrecognized switch -gnaty-" & C & " ignored");
|
|
|
576 else
|
|
|
577 Err_Col := Err_Col - 1;
|
|
|
578 Bad_Style_Switch ("invalid style switch");
|
|
|
579 return;
|
|
|
580 end if;
|
|
|
581 end case;
|
|
|
582 end if;
|
|
|
583 end loop;
|
|
|
584
|
|
|
585 -- Turn on style checking if other than N at end of string
|
|
|
586
|
|
|
587 Style_Check := (Last_Option /= 'N');
|
|
|
588 OK := True;
|
|
|
589 end Set_Style_Check_Options;
|
|
|
590 end Stylesw;
|
