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1 ------------------------------------------------------------------------------
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2 -- --
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3 -- GNAT RUN-TIME COMPONENTS --
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4 -- --
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5 -- S Y S T E M . I M G _ C H A R --
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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. --
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17 -- --
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18 -- As a special exception under Section 7 of GPL version 3, you are granted --
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19 -- additional permissions described in the GCC Runtime Library Exception, --
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20 -- version 3.1, as published by the Free Software Foundation. --
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21 -- --
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22 -- You should have received a copy of the GNU General Public License and --
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23 -- a copy of the GCC Runtime Library Exception along with this program; --
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24 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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25 -- <http://www.gnu.org/licenses/>. --
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26 -- --
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27 -- GNAT was originally developed by the GNAT team at New York University. --
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28 -- Extensive contributions were provided by Ada Core Technologies Inc. --
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29 -- --
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30 ------------------------------------------------------------------------------
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31
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32 package body System.Img_Char is
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33
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34 ---------------------
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35 -- Image_Character --
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36 ---------------------
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37
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38 procedure Image_Character
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39 (V : Character;
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40 S : in out String;
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41 P : out Natural)
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42 is
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43 pragma Assert (S'First = 1);
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44
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45 subtype Cname is String (1 .. 3);
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46
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47 subtype C0_Range is Character
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48 range Character'Val (16#00#) .. Character'Val (16#1F#);
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49
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50 C0 : constant array (C0_Range) of Cname :=
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51 (Character'Val (16#00#) => "NUL",
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52 Character'Val (16#01#) => "SOH",
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53 Character'Val (16#02#) => "STX",
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54 Character'Val (16#03#) => "ETX",
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55 Character'Val (16#04#) => "EOT",
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56 Character'Val (16#05#) => "ENQ",
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57 Character'Val (16#06#) => "ACK",
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58 Character'Val (16#07#) => "BEL",
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59 Character'Val (16#08#) => "BS ",
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60 Character'Val (16#09#) => "HT ",
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61 Character'Val (16#0A#) => "LF ",
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62 Character'Val (16#0B#) => "VT ",
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63 Character'Val (16#0C#) => "FF ",
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64 Character'Val (16#0D#) => "CR ",
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65 Character'Val (16#0E#) => "SO ",
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66 Character'Val (16#0F#) => "SI ",
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67 Character'Val (16#10#) => "DLE",
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68 Character'Val (16#11#) => "DC1",
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69 Character'Val (16#12#) => "DC2",
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70 Character'Val (16#13#) => "DC3",
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71 Character'Val (16#14#) => "DC4",
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72 Character'Val (16#15#) => "NAK",
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73 Character'Val (16#16#) => "SYN",
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74 Character'Val (16#17#) => "ETB",
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75 Character'Val (16#18#) => "CAN",
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76 Character'Val (16#19#) => "EM ",
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77 Character'Val (16#1A#) => "SUB",
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78 Character'Val (16#1B#) => "ESC",
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79 Character'Val (16#1C#) => "FS ",
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80 Character'Val (16#1D#) => "GS ",
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81 Character'Val (16#1E#) => "RS ",
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82 Character'Val (16#1F#) => "US ");
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83
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84 subtype C1_Range is Character
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85 range Character'Val (16#7F#) .. Character'Val (16#9F#);
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86
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87 C1 : constant array (C1_Range) of Cname :=
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88 (Character'Val (16#7F#) => "DEL",
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89 Character'Val (16#80#) => "res",
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90 Character'Val (16#81#) => "res",
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91 Character'Val (16#82#) => "BPH",
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92 Character'Val (16#83#) => "NBH",
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93 Character'Val (16#84#) => "res",
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94 Character'Val (16#85#) => "NEL",
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95 Character'Val (16#86#) => "SSA",
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96 Character'Val (16#87#) => "ESA",
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97 Character'Val (16#88#) => "HTS",
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98 Character'Val (16#89#) => "HTJ",
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99 Character'Val (16#8A#) => "VTS",
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100 Character'Val (16#8B#) => "PLD",
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101 Character'Val (16#8C#) => "PLU",
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102 Character'Val (16#8D#) => "RI ",
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103 Character'Val (16#8E#) => "SS2",
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104 Character'Val (16#8F#) => "SS3",
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105 Character'Val (16#90#) => "DCS",
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106 Character'Val (16#91#) => "PU1",
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107 Character'Val (16#92#) => "PU2",
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108 Character'Val (16#93#) => "STS",
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109 Character'Val (16#94#) => "CCH",
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110 Character'Val (16#95#) => "MW ",
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111 Character'Val (16#96#) => "SPA",
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112 Character'Val (16#97#) => "EPA",
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113 Character'Val (16#98#) => "SOS",
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114 Character'Val (16#99#) => "res",
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115 Character'Val (16#9A#) => "SCI",
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116 Character'Val (16#9B#) => "CSI",
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117 Character'Val (16#9C#) => "ST ",
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118 Character'Val (16#9D#) => "OSC",
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119 Character'Val (16#9E#) => "PM ",
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120 Character'Val (16#9F#) => "APC");
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121
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122 begin
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123 -- Control characters are represented by their names (RM 3.5(32))
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124
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125 if V in C0_Range then
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126 S (1 .. 3) := C0 (V);
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127 P := (if S (3) = ' ' then 2 else 3);
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128
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129 elsif V in C1_Range then
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130 S (1 .. 3) := C1 (V);
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131
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132 if S (1) /= 'r' then
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133 P := (if S (3) = ' ' then 2 else 3);
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134
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135 -- Special case, res means RESERVED_nnn where nnn is the three digit
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136 -- decimal value corresponding to the code position (more efficient
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137 -- to compute than to store).
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138
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139 else
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140 declare
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141 VP : constant Natural := Character'Pos (V);
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142 begin
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143 S (1 .. 9) := "RESERVED_";
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144 S (10) := Character'Val (48 + VP / 100);
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145 S (11) := Character'Val (48 + (VP / 10) mod 10);
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146 S (12) := Character'Val (48 + VP mod 10);
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147 P := 12;
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148 end;
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149 end if;
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150
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151 -- Normal characters yield the character enclosed in quotes (RM 3.5(32))
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152
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153 else
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154 S (1) := ''';
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155 S (2) := V;
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156 S (3) := ''';
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157 P := 3;
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158 end if;
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159 end Image_Character;
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160
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161 ------------------------
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162 -- Image_Character_05 --
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163 ------------------------
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164
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165 procedure Image_Character_05
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166 (V : Character;
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167 S : in out String;
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168 P : out Natural)
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169 is
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170 pragma Assert (S'First = 1);
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171 begin
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172 if V = Character'Val (16#00AD#) then
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173 P := 11;
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174 S (1 .. P) := "SOFT_HYPHEN";
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175 else
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176 Image_Character (V, S, P);
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177 end if;
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178 end Image_Character_05;
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179
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180 end System.Img_Char;
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