------------------------------------------------------------------------------ -- -- -- GNAT RUNTIME COMPONENTS -- -- -- -- S Y S T E M . I M G _ C H A R -- -- -- -- B o d y -- -- -- -- -- -- Copyright (C) 1992,1993,1994,1995 Free Software Foundation, Inc. -- -- -- -- GNAT is free software; you can redistribute it and/or modify it under -- -- terms of the GNU General Public License as published by the Free Soft- -- -- ware Foundation; either version 2, or (at your option) any later ver- -- -- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -- -- for more details. You should have received a copy of the GNU General -- -- Public License distributed with GNAT; see file COPYING. If not, write -- -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, -- -- MA 02111-1307, USA. -- -- -- -- As a special exception, if other files instantiate generics from this -- -- unit, or you link this unit with other files to produce an executable, -- -- this unit does not by itself cause the resulting executable to be -- -- covered by the GNU General Public License. This exception does not -- -- however invalidate any other reasons why the executable file might be -- -- covered by the GNU Public License. -- -- -- -- GNAT was originally developed by the GNAT team at New York University. -- -- Extensive contributions were provided by Ada Core Technologies Inc. -- -- -- ------------------------------------------------------------------------------ package body System.Img_Char is --------------------- -- Image_Character -- --------------------- function Image_Character (V : Character) return String is subtype Cname is String (1 .. 3); S : Cname; subtype C0_Range is Character range Character'Val (16#00#) .. Character'Val (16#1F#); C0 : constant array (C0_Range) of Cname := (Character'Val (16#00#) => "NUL", Character'Val (16#01#) => "SOH", Character'Val (16#02#) => "STX", Character'Val (16#03#) => "ETX", Character'Val (16#04#) => "EOT", Character'Val (16#05#) => "ENQ", Character'Val (16#06#) => "ACK", Character'Val (16#07#) => "BEL", Character'Val (16#08#) => "BS ", Character'Val (16#09#) => "HT ", Character'Val (16#0A#) => "LF ", Character'Val (16#0B#) => "VT ", Character'Val (16#0C#) => "FF ", Character'Val (16#0D#) => "CR ", Character'Val (16#0E#) => "SO ", Character'Val (16#0F#) => "SI ", Character'Val (16#10#) => "DLE", Character'Val (16#11#) => "DC1", Character'Val (16#12#) => "DC2", Character'Val (16#13#) => "DC3", Character'Val (16#14#) => "DC4", Character'Val (16#15#) => "NAK", Character'Val (16#16#) => "SYN", Character'Val (16#17#) => "ETB", Character'Val (16#18#) => "CAN", Character'Val (16#19#) => "EM ", Character'Val (16#1A#) => "SUB", Character'Val (16#1B#) => "ESC", Character'Val (16#1C#) => "FS ", Character'Val (16#1D#) => "GS ", Character'Val (16#1E#) => "RS ", Character'Val (16#1F#) => "US "); subtype C1_Range is Character range Character'Val (16#7F#) .. Character'Val (16#9F#); C1 : constant array (C1_Range) of Cname := (Character'Val (16#7F#) => "DEL", Character'Val (16#80#) => "res", Character'Val (16#81#) => "res", Character'Val (16#82#) => "BPH", Character'Val (16#83#) => "NBH", Character'Val (16#84#) => "res", Character'Val (16#85#) => "NEL", Character'Val (16#86#) => "SSA", Character'Val (16#87#) => "ESA", Character'Val (16#88#) => "HTS", Character'Val (16#89#) => "HTJ", Character'Val (16#8A#) => "VTS", Character'Val (16#8B#) => "PLD", Character'Val (16#8C#) => "PLU", Character'Val (16#8D#) => "RI ", Character'Val (16#8E#) => "SS2", Character'Val (16#8F#) => "SS3", Character'Val (16#90#) => "DCS", Character'Val (16#91#) => "PU1", Character'Val (16#92#) => "PU2", Character'Val (16#93#) => "STS", Character'Val (16#94#) => "CCH", Character'Val (16#95#) => "MW ", Character'Val (16#96#) => "SPA", Character'Val (16#97#) => "EPA", Character'Val (16#98#) => "SOS", Character'Val (16#99#) => "res", Character'Val (16#9A#) => "SCI", Character'Val (16#9B#) => "CSI", Character'Val (16#9C#) => "ST ", Character'Val (16#9D#) => "OSC", Character'Val (16#9E#) => "PM ", Character'Val (16#9F#) => "APC"); begin -- Control characters are represented by their names (RM 3.5(32)) if V in C0_Range then S := C0 (V); if S (3) = ' ' then return S (1 .. 2); else return S; end if; elsif V in C1_Range then S := C1 (V); if S (1) /= 'r' then if S (3) = ' ' then return S (1 .. 2); else return S; end if; -- Special case, res means RESERVED_nnn where nnn is the three digit -- decimal value corresponding to the code position (more efficient -- to compute than to store!) else declare VP : constant Natural := Character'Pos (V); St : String (1 .. 12) := "RESERVED_xxx"; begin St (10) := Character'Val (48 + VP / 100); St (11) := Character'Val (48 + (VP / 10) mod 10); St (12) := Character'Val (48 + VP mod 10); return St; end; end if; -- Normal characters yield the character enlosed in quotes (RM 3.5(32)) else S (1) := '''; S (2) := V; S (3) := '''; return S; end if; end Image_Character; end System.Img_Char;