gcc/ada/s-imgcha.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUN-TIME COMPONENTS                         --
   4 --                                                                          --
   5 --                      S Y S T E M . I M G _ C H A R                       --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1992-2009, Free Software Foundation, Inc.         --
  10 --                                                                          --
  11 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  12 -- terms of the  GNU General Public License as published  by the Free Soft- --
  13 -- ware  Foundation;  either version 3,  or (at your option) any later ver- --
  14 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  15 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  16 -- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
  17 --                                                                          --
  18 -- As a special exception under Section 7 of GPL version 3, you are granted --
  19 -- additional permissions described in the GCC Runtime Library Exception,   --
  20 -- version 3.1, as published by the Free Software Foundation.               --
  21 --                                                                          --
  22 -- You should have received a copy of the GNU General Public License and    --
  23 -- a copy of the GCC Runtime Library Exception along with this program;     --
  24 -- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
  25 -- <http://www.gnu.org/licenses/>.                                          --
  26 --                                                                          --
  27 -- GNAT was originally developed  by the GNAT team at  New York University. --
  28 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  29 --                                                                          --
  30 ------------------------------------------------------------------------------
  31
  32 package body System.Img_Char is
  33
  34    ---------------------
  35    -- Image_Character --
  36    ---------------------
  37
  38    procedure Image_Character
  39      (V : Character;
  40       S : in out String;
  41       P : out Natural)
  42    is
  43       pragma Assert (S'First = 1);
  44
  45       subtype Cname is String (1 .. 3);
  46
  47       subtype C0_Range is Character
  48         range Character'Val (16#00#) .. Character'Val (16#1F#);
  49
  50       C0 : constant array (C0_Range) of Cname :=
  51               (Character'Val (16#00#) => "NUL",
  52                Character'Val (16#01#) => "SOH",
  53                Character'Val (16#02#) => "STX",
  54                Character'Val (16#03#) => "ETX",
  55                Character'Val (16#04#) => "EOT",
  56                Character'Val (16#05#) => "ENQ",
  57                Character'Val (16#06#) => "ACK",
  58                Character'Val (16#07#) => "BEL",
  59                Character'Val (16#08#) => "BS ",
  60                Character'Val (16#09#) => "HT ",
  61                Character'Val (16#0A#) => "LF ",
  62                Character'Val (16#0B#) => "VT ",
  63                Character'Val (16#0C#) => "FF ",
  64                Character'Val (16#0D#) => "CR ",
  65                Character'Val (16#0E#) => "SO ",
  66                Character'Val (16#0F#) => "SI ",
  67                Character'Val (16#10#) => "DLE",
  68                Character'Val (16#11#) => "DC1",
  69                Character'Val (16#12#) => "DC2",
  70                Character'Val (16#13#) => "DC3",
  71                Character'Val (16#14#) => "DC4",
  72                Character'Val (16#15#) => "NAK",
  73                Character'Val (16#16#) => "SYN",
  74                Character'Val (16#17#) => "ETB",
  75                Character'Val (16#18#) => "CAN",
  76                Character'Val (16#19#) => "EM ",
  77                Character'Val (16#1A#) => "SUB",
  78                Character'Val (16#1B#) => "ESC",
  79                Character'Val (16#1C#) => "FS ",
  80                Character'Val (16#1D#) => "GS ",
  81                Character'Val (16#1E#) => "RS ",
  82                Character'Val (16#1F#) => "US ");
  83
  84       subtype C1_Range is Character
  85         range Character'Val (16#7F#) .. Character'Val (16#9F#);
  86
  87       C1 : constant array (C1_Range) of Cname :=
  88               (Character'Val (16#7F#) => "DEL",
  89                Character'Val (16#80#) => "res",
  90                Character'Val (16#81#) => "res",
  91                Character'Val (16#82#) => "BPH",
  92                Character'Val (16#83#) => "NBH",
  93                Character'Val (16#84#) => "res",
  94                Character'Val (16#85#) => "NEL",
  95                Character'Val (16#86#) => "SSA",
  96                Character'Val (16#87#) => "ESA",
  97                Character'Val (16#88#) => "HTS",
  98                Character'Val (16#89#) => "HTJ",
  99                Character'Val (16#8A#) => "VTS",
 100                Character'Val (16#8B#) => "PLD",
 101                Character'Val (16#8C#) => "PLU",
 102                Character'Val (16#8D#) => "RI ",
 103                Character'Val (16#8E#) => "SS2",
 104                Character'Val (16#8F#) => "SS3",
 105                Character'Val (16#90#) => "DCS",
 106                Character'Val (16#91#) => "PU1",
 107                Character'Val (16#92#) => "PU2",
 108                Character'Val (16#93#) => "STS",
 109                Character'Val (16#94#) => "CCH",
 110                Character'Val (16#95#) => "MW ",
 111                Character'Val (16#96#) => "SPA",
 112                Character'Val (16#97#) => "EPA",
 113                Character'Val (16#98#) => "SOS",
 114                Character'Val (16#99#) => "res",
 115                Character'Val (16#9A#) => "SCI",
 116                Character'Val (16#9B#) => "CSI",
 117                Character'Val (16#9C#) => "ST ",
 118                Character'Val (16#9D#) => "OSC",
 119                Character'Val (16#9E#) => "PM ",
 120                Character'Val (16#9F#) => "APC");
 121
 122    begin
 123       --  Control characters are represented by their names (RM 3.5(32))
 124
 125       if V in C0_Range then
 126          S (1 .. 3) := C0 (V);
 127          P := (if S (3) = ' ' then 2 else 3);
 128
 129       elsif V in C1_Range then
 130          S (1 .. 3) := C1 (V);
 131
 132          if S (1) /= 'r' then
 133             P := (if S (3) = ' ' then 2 else 3);
 134
 135          --  Special case, res means RESERVED_nnn where nnn is the three digit
 136          --  decimal value corresponding to the code position (more efficient
 137          --  to compute than to store!)
 138
 139          else
 140             declare
 141                VP : constant Natural := Character'Pos (V);
 142             begin
 143                S (1 .. 9) := "RESERVED_";
 144                S (10) := Character'Val (48 + VP / 100);
 145                S (11) := Character'Val (48 + (VP / 10) mod 10);
 146                S (12) := Character'Val (48 + VP mod 10);
 147                P := 12;
 148             end;
 149          end if;
 150
 151       --  Normal characters yield the character enclosed in quotes (RM 3.5(32))
 152
 153       else
 154          S (1) := ''';
 155          S (2) := V;
 156          S (3) := ''';
 157          P := 3;
 158       end if;
 159    end Image_Character;
 160
 161 end System.Img_Char;