gcc/ada/csets.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                                C S E T S                                 --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1992-2005, 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 2,  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.  See the GNU General Public License --
  17 -- for  more details.  You should have  received  a copy of the GNU General --
  18 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  19 -- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
  20 -- MA 02111-1307, USA.                                                      --
  21 --                                                                          --
  22 -- As a special exception,  if other files  instantiate  generics from this --
  23 -- unit, or you link  this unit with other files  to produce an executable, --
  24 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  25 -- covered  by the  GNU  General  Public  License.  This exception does not --
  26 -- however invalidate  any other reasons why  the executable file  might be --
  27 -- covered by the  GNU Public License.                                      --
  28 --                                                                          --
  29 -- GNAT was originally developed  by the GNAT team at  New York University. --
  30 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  31 --                                                                          --
  32 ------------------------------------------------------------------------------
  33
  34 with Opt;   use Opt;
  35
  36 with System.WCh_Con; use System.WCh_Con;
  37
  38 package body Csets is
  39
  40    X_80 : constant Character := Character'Val (16#80#);
  41    X_81 : constant Character := Character'Val (16#81#);
  42    X_82 : constant Character := Character'Val (16#82#);
  43    X_83 : constant Character := Character'Val (16#83#);
  44    X_84 : constant Character := Character'Val (16#84#);
  45    X_85 : constant Character := Character'Val (16#85#);
  46    X_86 : constant Character := Character'Val (16#86#);
  47    X_87 : constant Character := Character'Val (16#87#);
  48    X_88 : constant Character := Character'Val (16#88#);
  49    X_89 : constant Character := Character'Val (16#89#);
  50    X_8A : constant Character := Character'Val (16#8A#);
  51    X_8B : constant Character := Character'Val (16#8B#);
  52    X_8C : constant Character := Character'Val (16#8C#);
  53    X_8D : constant Character := Character'Val (16#8D#);
  54    X_8E : constant Character := Character'Val (16#8E#);
  55    X_8F : constant Character := Character'Val (16#8F#);
  56    X_90 : constant Character := Character'Val (16#90#);
  57    X_91 : constant Character := Character'Val (16#91#);
  58    X_92 : constant Character := Character'Val (16#92#);
  59    X_93 : constant Character := Character'Val (16#93#);
  60    X_94 : constant Character := Character'Val (16#94#);
  61    X_95 : constant Character := Character'Val (16#95#);
  62    X_96 : constant Character := Character'Val (16#96#);
  63    X_97 : constant Character := Character'Val (16#97#);
  64    X_98 : constant Character := Character'Val (16#98#);
  65    X_99 : constant Character := Character'Val (16#99#);
  66    X_9A : constant Character := Character'Val (16#9A#);
  67    X_9B : constant Character := Character'Val (16#9B#);
  68    X_9C : constant Character := Character'Val (16#9C#);
  69    X_9D : constant Character := Character'Val (16#9D#);
  70    X_9E : constant Character := Character'Val (16#9E#);
  71    X_9F : constant Character := Character'Val (16#9F#);
  72    X_A0 : constant Character := Character'Val (16#A0#);
  73    X_A1 : constant Character := Character'Val (16#A1#);
  74    X_A2 : constant Character := Character'Val (16#A2#);
  75    X_A3 : constant Character := Character'Val (16#A3#);
  76    X_A4 : constant Character := Character'Val (16#A4#);
  77    X_A5 : constant Character := Character'Val (16#A5#);
  78    X_A6 : constant Character := Character'Val (16#A6#);
  79    X_A7 : constant Character := Character'Val (16#A7#);
  80    X_A8 : constant Character := Character'Val (16#A8#);
  81    X_A9 : constant Character := Character'Val (16#A9#);
  82    X_AA : constant Character := Character'Val (16#AA#);
  83    X_AB : constant Character := Character'Val (16#AB#);
  84    X_AC : constant Character := Character'Val (16#AC#);
  85    X_AD : constant Character := Character'Val (16#AD#);
  86    X_AE : constant Character := Character'Val (16#AE#);
  87    X_AF : constant Character := Character'Val (16#AF#);
  88    X_B0 : constant Character := Character'Val (16#B0#);
  89    X_B1 : constant Character := Character'Val (16#B1#);
  90    X_B2 : constant Character := Character'Val (16#B2#);
  91    X_B3 : constant Character := Character'Val (16#B3#);
  92    X_B4 : constant Character := Character'Val (16#B4#);
  93    X_B5 : constant Character := Character'Val (16#B5#);
  94    X_B6 : constant Character := Character'Val (16#B6#);
  95    X_B7 : constant Character := Character'Val (16#B7#);
  96    X_B8 : constant Character := Character'Val (16#B8#);
  97    X_B9 : constant Character := Character'Val (16#B9#);
  98    X_BA : constant Character := Character'Val (16#BA#);
  99    X_BB : constant Character := Character'Val (16#BB#);
 100    X_BC : constant Character := Character'Val (16#BC#);
 101    X_BD : constant Character := Character'Val (16#BD#);
 102    X_BE : constant Character := Character'Val (16#BE#);
 103    X_BF : constant Character := Character'Val (16#BF#);
 104    X_C0 : constant Character := Character'Val (16#C0#);
 105    X_C1 : constant Character := Character'Val (16#C1#);
 106    X_C2 : constant Character := Character'Val (16#C2#);
 107    X_C3 : constant Character := Character'Val (16#C3#);
 108    X_C4 : constant Character := Character'Val (16#C4#);
 109    X_C5 : constant Character := Character'Val (16#C5#);
 110    X_C6 : constant Character := Character'Val (16#C6#);
 111    X_C7 : constant Character := Character'Val (16#C7#);
 112    X_C8 : constant Character := Character'Val (16#C8#);
 113    X_C9 : constant Character := Character'Val (16#C9#);
 114    X_CA : constant Character := Character'Val (16#CA#);
 115    X_CB : constant Character := Character'Val (16#CB#);
 116    X_CC : constant Character := Character'Val (16#CC#);
 117    X_CD : constant Character := Character'Val (16#CD#);
 118    X_CE : constant Character := Character'Val (16#CE#);
 119    X_CF : constant Character := Character'Val (16#CF#);
 120    X_D0 : constant Character := Character'Val (16#D0#);
 121    X_D1 : constant Character := Character'Val (16#D1#);
 122    X_D2 : constant Character := Character'Val (16#D2#);
 123    X_D3 : constant Character := Character'Val (16#D3#);
 124    X_D4 : constant Character := Character'Val (16#D4#);
 125    X_D5 : constant Character := Character'Val (16#D5#);
 126    X_D6 : constant Character := Character'Val (16#D6#);
 127    X_D7 : constant Character := Character'Val (16#D7#);
 128    X_D8 : constant Character := Character'Val (16#D8#);
 129    X_D9 : constant Character := Character'Val (16#D9#);
 130    X_DA : constant Character := Character'Val (16#DA#);
 131    X_DB : constant Character := Character'Val (16#DB#);
 132    X_DC : constant Character := Character'Val (16#DC#);
 133    X_DD : constant Character := Character'Val (16#DD#);
 134    X_DE : constant Character := Character'Val (16#DE#);
 135    X_DF : constant Character := Character'Val (16#DF#);
 136    X_E0 : constant Character := Character'Val (16#E0#);
 137    X_E1 : constant Character := Character'Val (16#E1#);
 138    X_E2 : constant Character := Character'Val (16#E2#);
 139    X_E3 : constant Character := Character'Val (16#E3#);
 140    X_E4 : constant Character := Character'Val (16#E4#);
 141    X_E5 : constant Character := Character'Val (16#E5#);
 142    X_E6 : constant Character := Character'Val (16#E6#);
 143    X_E7 : constant Character := Character'Val (16#E7#);
 144    X_E8 : constant Character := Character'Val (16#E8#);
 145    X_E9 : constant Character := Character'Val (16#E9#);
 146    X_EA : constant Character := Character'Val (16#EA#);
 147    X_EB : constant Character := Character'Val (16#EB#);
 148    X_EC : constant Character := Character'Val (16#EC#);
 149    X_ED : constant Character := Character'Val (16#ED#);
 150    X_EE : constant Character := Character'Val (16#EE#);
 151    X_EF : constant Character := Character'Val (16#EF#);
 152    X_F0 : constant Character := Character'Val (16#F0#);
 153    X_F1 : constant Character := Character'Val (16#F1#);
 154    X_F2 : constant Character := Character'Val (16#F2#);
 155    X_F3 : constant Character := Character'Val (16#F3#);
 156    X_F4 : constant Character := Character'Val (16#F4#);
 157    X_F5 : constant Character := Character'Val (16#F5#);
 158    X_F6 : constant Character := Character'Val (16#F6#);
 159    X_F7 : constant Character := Character'Val (16#F7#);
 160    X_F8 : constant Character := Character'Val (16#F8#);
 161    X_F9 : constant Character := Character'Val (16#F9#);
 162    X_FA : constant Character := Character'Val (16#FA#);
 163    X_FB : constant Character := Character'Val (16#FB#);
 164    X_FC : constant Character := Character'Val (16#FC#);
 165    X_FD : constant Character := Character'Val (16#FD#);
 166    X_FE : constant Character := Character'Val (16#FE#);
 167    X_FF : constant Character := Character'Val (16#FF#);
 168
 169    ------------------------------------------
 170    -- Definitions for Latin-1 (ISO 8859-1) --
 171    ------------------------------------------
 172
 173    Fold_Latin_1 : constant Translate_Table := Translate_Table'(
 174
 175       'a' => 'A',  X_E0 => X_C0,  X_F0 => X_D0,
 176       'b' => 'B',  X_E1 => X_C1,  X_F1 => X_D1,
 177       'c' => 'C',  X_E2 => X_C2,  X_F2 => X_D2,
 178       'd' => 'D',  X_E3 => X_C3,  X_F3 => X_D3,
 179       'e' => 'E',  X_E4 => X_C4,  X_F4 => X_D4,
 180       'f' => 'F',  X_E5 => X_C5,  X_F5 => X_D5,
 181       'g' => 'G',  X_E6 => X_C6,  X_F6 => X_D6,
 182       'h' => 'H',  X_E7 => X_C7,
 183       'i' => 'I',  X_E8 => X_C8,  X_F8 => X_D8,
 184       'j' => 'J',  X_E9 => X_C9,  X_F9 => X_D9,
 185       'k' => 'K',  X_EA => X_CA,  X_FA => X_DA,
 186       'l' => 'L',  X_EB => X_CB,  X_FB => X_DB,
 187       'm' => 'M',  X_EC => X_CC,  X_FC => X_DC,
 188       'n' => 'N',  X_ED => X_CD,  X_FD => X_DD,
 189       'o' => 'O',  X_EE => X_CE,  X_FE => X_DE,
 190       'p' => 'P',  X_EF => X_CF,
 191       'q' => 'Q',
 192       'r' => 'R',
 193       's' => 'S',
 194       't' => 'T',
 195       'u' => 'U',
 196       'v' => 'V',
 197       'w' => 'W',
 198       'x' => 'X',
 199       'y' => 'Y',
 200       'z' => 'Z',
 201
 202       'A' => 'A',  X_C0 => X_C0,  X_D0 => X_D0,
 203       'B' => 'B',  X_C1 => X_C1,  X_D1 => X_D1,
 204       'C' => 'C',  X_C2 => X_C2,  X_D2 => X_D2,
 205       'D' => 'D',  X_C3 => X_C3,  X_D3 => X_D3,
 206       'E' => 'E',  X_C4 => X_C4,  X_D4 => X_D4,
 207       'F' => 'F',  X_C5 => X_C5,  X_D5 => X_D5,
 208       'G' => 'G',  X_C6 => X_C6,  X_D6 => X_D6,
 209       'H' => 'H',  X_C7 => X_C7,
 210       'I' => 'I',  X_C8 => X_C8,  X_D8 => X_D8,
 211       'J' => 'J',  X_C9 => X_C9,  X_D9 => X_D9,
 212       'K' => 'K',  X_CA => X_CA,  X_DA => X_DA,
 213       'L' => 'L',  X_CB => X_CB,  X_DB => X_DB,
 214       'M' => 'M',  X_CC => X_CC,  X_DC => X_DC,
 215       'N' => 'N',  X_CD => X_CD,  X_DD => X_DD,
 216       'O' => 'O',  X_CE => X_CE,  X_DE => X_DE,
 217       'P' => 'P',  X_CF => X_CF,  X_DF => X_DF,  X_FF => X_FF,
 218       'Q' => 'Q',
 219       'R' => 'R',
 220       'S' => 'S',
 221       'T' => 'T',
 222       'U' => 'U',
 223       'V' => 'V',
 224       'W' => 'W',
 225       'X' => 'X',
 226       'Y' => 'Y',
 227       'Z' => 'Z',
 228
 229       '0' => '0',
 230       '1' => '1',
 231       '2' => '2',
 232       '3' => '3',
 233       '4' => '4',
 234       '5' => '5',
 235       '6' => '6',
 236       '7' => '7',
 237       '8' => '8',
 238       '9' => '9',
 239
 240       '_' => '_',
 241
 242       others => ' ');
 243
 244    ------------------------------------------
 245    -- Definitions for Latin-2 (ISO 8859-2) --
 246    ------------------------------------------
 247
 248    Fold_Latin_2 : constant Translate_Table := Translate_Table'(
 249
 250       'a' => 'A',  X_E0 => X_C0,  X_F0 => X_D0,
 251       'b' => 'B',  X_E1 => X_C1,  X_F1 => X_D1,  X_B1 => X_A1,
 252       'c' => 'C',  X_E2 => X_C2,  X_F2 => X_D2,
 253       'd' => 'D',  X_E3 => X_C3,  X_F3 => X_D3,  X_B3 => X_A3,
 254       'e' => 'E',  X_E4 => X_C4,  X_F4 => X_D4,
 255       'f' => 'F',  X_E5 => X_C5,  X_F5 => X_D5,  X_B5 => X_A5,
 256       'g' => 'G',  X_E6 => X_C6,  X_F6 => X_D6,  X_B6 => X_A6,
 257       'h' => 'H',  X_E7 => X_C7,
 258       'i' => 'I',  X_E8 => X_C8,  X_F8 => X_D8,
 259       'j' => 'J',  X_E9 => X_C9,  X_F9 => X_D9,  X_B9 => X_A9,
 260       'k' => 'K',  X_EA => X_CA,  X_FA => X_DA,  X_BA => X_AA,
 261       'l' => 'L',  X_EB => X_CB,  X_FB => X_DB,  X_BB => X_AB,
 262       'm' => 'M',  X_EC => X_CC,  X_FC => X_DC,  X_BC => X_AC,
 263       'n' => 'N',  X_ED => X_CD,  X_FD => X_DD,
 264       'o' => 'O',  X_EE => X_CE,  X_FE => X_DE,  X_BE => X_AE,
 265       'p' => 'P',  X_EF => X_CF,  X_FF => X_DF,  X_BF => X_AF,
 266       'q' => 'Q',
 267       'r' => 'R',
 268       's' => 'S',
 269       't' => 'T',
 270       'u' => 'U',
 271       'v' => 'V',
 272       'w' => 'W',
 273       'x' => 'X',
 274       'y' => 'Y',
 275       'z' => 'Z',
 276
 277       'A' => 'A',  X_C0 => X_C0,  X_D0 => X_D0,
 278       'B' => 'B',  X_C1 => X_C1,  X_D1 => X_D1,  X_A1 => X_A1,
 279       'C' => 'C',  X_C2 => X_C2,  X_D2 => X_D2,
 280       'D' => 'D',  X_C3 => X_C3,  X_D3 => X_D3,  X_A3 => X_A3,
 281       'E' => 'E',  X_C4 => X_C4,  X_D4 => X_D4,
 282       'F' => 'F',  X_C5 => X_C5,  X_D5 => X_D5,  X_A5 => X_A5,
 283       'G' => 'G',  X_C6 => X_C6,  X_D6 => X_D6,  X_A6 => X_A6,
 284       'H' => 'H',  X_C7 => X_C7,
 285       'I' => 'I',  X_C8 => X_C8,  X_D8 => X_D8,
 286       'J' => 'J',  X_C9 => X_C9,  X_D9 => X_D9,  X_A9 => X_A9,
 287       'K' => 'K',  X_CA => X_CA,  X_DA => X_DA,  X_AA => X_AA,
 288       'L' => 'L',  X_CB => X_CB,  X_DB => X_DB,  X_AB => X_AB,
 289       'M' => 'M',  X_CC => X_CC,  X_DC => X_DC,  X_AC => X_AC,
 290       'N' => 'N',  X_CD => X_CD,  X_DD => X_DD,
 291       'O' => 'O',  X_CE => X_CE,  X_DE => X_DE,  X_AE => X_AE,
 292       'P' => 'P',  X_CF => X_CF,  X_DF => X_DF,  X_AF => X_AF,
 293       'Q' => 'Q',
 294       'R' => 'R',
 295       'S' => 'S',
 296       'T' => 'T',
 297       'U' => 'U',
 298       'V' => 'V',
 299       'W' => 'W',
 300       'X' => 'X',
 301       'Y' => 'Y',
 302       'Z' => 'Z',
 303
 304       '0' => '0',
 305       '1' => '1',
 306       '2' => '2',
 307       '3' => '3',
 308       '4' => '4',
 309       '5' => '5',
 310       '6' => '6',
 311       '7' => '7',
 312       '8' => '8',
 313       '9' => '9',
 314
 315       '_' => '_',
 316
 317       others => ' ');
 318
 319    ------------------------------------------
 320    -- Definitions for Latin-3 (ISO 8859-3) --
 321    ------------------------------------------
 322
 323    Fold_Latin_3 : constant Translate_Table := Translate_Table'(
 324
 325       'a' => 'A',  X_E0 => X_C0,
 326       'b' => 'B',  X_E1 => X_C1,  X_F1 => X_D1,  X_B1 => X_A1,
 327       'c' => 'C',  X_E2 => X_C2,  X_F2 => X_D2,
 328       'd' => 'D',                 X_F3 => X_D3,
 329       'e' => 'E',  X_E4 => X_C4,  X_F4 => X_D4,
 330       'f' => 'F',  X_E5 => X_C5,  X_F5 => X_D5,  X_B5 => X_A5,
 331       'g' => 'G',  X_E6 => X_C6,  X_F6 => X_D6,  X_B6 => X_A6,
 332       'h' => 'H',  X_E7 => X_C7,
 333       'i' => 'I',  X_E8 => X_C8,  X_F8 => X_D8,
 334       'j' => 'J',  X_E9 => X_C9,  X_F9 => X_D9,  X_B9 => X_A9,
 335       'k' => 'K',  X_EA => X_CA,  X_FA => X_DA,  X_BA => X_AA,
 336       'l' => 'L',  X_EB => X_CB,  X_FB => X_DB,  X_BB => X_AB,
 337       'm' => 'M',  X_EC => X_CC,  X_FC => X_DC,  X_BC => X_AC,
 338       'n' => 'N',  X_ED => X_CD,  X_FD => X_DD,
 339       'o' => 'O',  X_EE => X_CE,  X_FE => X_DE,
 340       'p' => 'P',  X_EF => X_CF,                 X_BF => X_AF,
 341       'q' => 'Q',
 342       'r' => 'R',
 343       's' => 'S',
 344       't' => 'T',
 345       'u' => 'U',
 346       'v' => 'V',
 347       'w' => 'W',
 348       'x' => 'X',
 349       'y' => 'Y',
 350       'z' => 'Z',
 351
 352       'A' => 'A',  X_C0 => X_C0,
 353       'B' => 'B',  X_C1 => X_C1,  X_D1 => X_D1,  X_A1 => X_A1,
 354       'C' => 'C',  X_C2 => X_C2,  X_D2 => X_D2,
 355       'D' => 'D',                 X_D3 => X_D3,
 356       'E' => 'E',  X_C4 => X_C4,  X_D4 => X_D4,
 357       'F' => 'F',  X_C5 => X_C5,  X_D5 => X_D5,  X_A5 => X_A5,
 358       'G' => 'G',  X_C6 => X_C6,  X_D6 => X_D6,  X_A6 => X_A6,
 359       'H' => 'H',  X_C7 => X_C7,
 360       'I' => 'I',  X_C8 => X_C8,  X_D8 => X_D8,
 361       'J' => 'J',  X_C9 => X_C9,  X_D9 => X_D9,  X_A9 => X_A9,
 362       'K' => 'K',  X_CA => X_CA,  X_DA => X_DA,  X_AA => X_AA,
 363       'L' => 'L',  X_CB => X_CB,  X_DB => X_DB,  X_AB => X_AB,
 364       'M' => 'M',  X_CC => X_CC,  X_DC => X_DC,  X_AC => X_AC,
 365       'N' => 'N',  X_CD => X_CD,  X_DD => X_DD,
 366       'O' => 'O',  X_CE => X_CE,  X_DE => X_DE,
 367       'P' => 'P',  X_CF => X_CF,                 X_AF => X_AF,
 368       'Q' => 'Q',
 369       'R' => 'R',
 370       'S' => 'S',
 371       'T' => 'T',
 372       'U' => 'U',
 373       'V' => 'V',
 374       'W' => 'W',
 375       'X' => 'X',
 376       'Y' => 'Y',
 377       'Z' => 'Z',
 378
 379       '0' => '0',
 380       '1' => '1',
 381       '2' => '2',
 382       '3' => '3',
 383       '4' => '4',
 384       '5' => '5',
 385       '6' => '6',
 386       '7' => '7',
 387       '8' => '8',
 388       '9' => '9',
 389
 390       '_' => '_',
 391
 392       others => ' ');
 393
 394    ------------------------------------------
 395    -- Definitions for Latin-4 (ISO 8859-4) --
 396    ------------------------------------------
 397
 398    Fold_Latin_4 : constant Translate_Table := Translate_Table'(
 399
 400       'a' => 'A',  X_E0 => X_C0,  X_F0 => X_D0,
 401       'b' => 'B',  X_E1 => X_C1,  X_F1 => X_D1,  X_B1 => X_A1,
 402       'c' => 'C',  X_E2 => X_C2,  X_F2 => X_D2,
 403       'd' => 'D',  X_E3 => X_C3,  X_F3 => X_D3,  X_B3 => X_A3,
 404       'e' => 'E',  X_E4 => X_C4,  X_F4 => X_D4,
 405       'f' => 'F',  X_E5 => X_C5,  X_F5 => X_D5,  X_B5 => X_A5,
 406       'g' => 'G',  X_E6 => X_C6,  X_F6 => X_D6,  X_B6 => X_A6,
 407       'h' => 'H',  X_E7 => X_C7,
 408       'i' => 'I',  X_E8 => X_C8,  X_F8 => X_D8,
 409       'j' => 'J',  X_E9 => X_C9,  X_F9 => X_D9,  X_B9 => X_A9,
 410       'k' => 'K',  X_EA => X_CA,  X_FA => X_DA,  X_BA => X_AA,
 411       'l' => 'L',  X_EB => X_CB,  X_FB => X_DB,  X_BB => X_AB,
 412       'm' => 'M',  X_EC => X_CC,  X_FC => X_DC,  X_BC => X_AC,
 413       'n' => 'N',  X_ED => X_CD,  X_FD => X_DD,
 414       'o' => 'O',  X_EE => X_CE,  X_FE => X_DE,  X_BE => X_AE,
 415       'p' => 'P',  X_EF => X_CF,
 416       'q' => 'Q',
 417       'r' => 'R',
 418       's' => 'S',
 419       't' => 'T',
 420       'u' => 'U',
 421       'v' => 'V',
 422       'w' => 'W',
 423       'x' => 'X',
 424       'y' => 'Y',
 425       'z' => 'Z',
 426
 427       'A' => 'A',  X_C0 => X_C0,  X_D0 => X_D0,
 428       'B' => 'B',  X_C1 => X_C1,  X_D1 => X_D1,  X_A1 => X_A1,
 429       'C' => 'C',  X_C2 => X_C2,  X_D2 => X_D2,
 430       'D' => 'D',  X_C3 => X_C3,  X_D3 => X_D3,  X_A3 => X_A3,
 431       'E' => 'E',  X_C4 => X_C4,  X_D4 => X_D4,
 432       'F' => 'F',  X_C5 => X_C5,  X_D5 => X_D5,  X_A5 => X_A5,
 433       'G' => 'G',  X_C6 => X_C6,  X_D6 => X_D6,  X_A6 => X_A6,
 434       'H' => 'H',  X_C7 => X_C7,
 435       'I' => 'I',  X_C8 => X_C8,  X_D8 => X_D8,
 436       'J' => 'J',  X_C9 => X_C9,  X_D9 => X_D9,  X_A9 => X_A9,
 437       'K' => 'K',  X_CA => X_CA,  X_DA => X_DA,  X_AA => X_AA,
 438       'L' => 'L',  X_CB => X_CB,  X_DB => X_DB,  X_AB => X_AB,
 439       'M' => 'M',  X_CC => X_CC,  X_DC => X_DC,  X_AC => X_AC,
 440       'N' => 'N',  X_CD => X_CD,  X_DD => X_DD,
 441       'O' => 'O',  X_CE => X_CE,  X_DE => X_DE,  X_AE => X_AE,
 442       'P' => 'P',  X_CF => X_CF,
 443       'Q' => 'Q',
 444       'R' => 'R',
 445       'S' => 'S',
 446       'T' => 'T',
 447       'U' => 'U',
 448       'V' => 'V',
 449       'W' => 'W',
 450       'X' => 'X',
 451       'Y' => 'Y',
 452       'Z' => 'Z',
 453
 454       '0' => '0',
 455       '1' => '1',
 456       '2' => '2',
 457       '3' => '3',
 458       '4' => '4',
 459       '5' => '5',
 460       '6' => '6',
 461       '7' => '7',
 462       '8' => '8',
 463       '9' => '9',
 464
 465       '_' => '_',
 466
 467       others => ' ');
 468
 469    ---------------------------------------------------
 470    -- Definitions for Latin-5 (Cyrillic ISO-8859-5) --
 471    ---------------------------------------------------
 472
 473    Fold_Latin_5 : constant Translate_Table := Translate_Table'(
 474
 475       'a' => 'A',  X_D0 => X_B0,  X_E0 => X_C0,
 476       'b' => 'B',  X_D1 => X_B1,  X_E1 => X_C1,  X_F1 => X_A1,
 477       'c' => 'C',  X_D2 => X_B2,  X_E2 => X_C2,  X_F2 => X_A2,
 478       'd' => 'D',  X_D3 => X_B3,  X_E3 => X_C3,  X_F3 => X_A3,
 479       'e' => 'E',  X_D4 => X_B4,  X_E4 => X_C4,  X_F4 => X_A4,
 480       'f' => 'F',  X_D5 => X_B5,  X_E5 => X_C5,  X_F5 => X_A5,
 481       'g' => 'G',  X_D6 => X_B6,  X_E6 => X_C6,  X_F6 => X_A6,
 482       'h' => 'H',  X_D7 => X_B7,  X_E7 => X_C7,  X_F7 => X_A7,
 483       'i' => 'I',  X_D8 => X_B8,  X_E8 => X_C8,  X_F8 => X_A8,
 484       'j' => 'J',  X_D9 => X_B9,  X_E9 => X_C9,  X_F9 => X_A9,
 485       'k' => 'K',  X_DA => X_BA,  X_EA => X_CA,  X_FA => X_AA,
 486       'l' => 'L',  X_DB => X_BB,  X_EB => X_CB,  X_FB => X_AB,
 487       'm' => 'M',  X_DC => X_BC,  X_EC => X_CC,  X_FC => X_AC,
 488       'n' => 'N',  X_DD => X_BD,  X_ED => X_CD,
 489       'o' => 'O',  X_DE => X_BE,  X_EE => X_CE,  X_FE => X_AE,
 490       'p' => 'P',  X_DF => X_BF,  X_EF => X_CF,  X_FF => X_AF,
 491       'q' => 'Q',
 492       'r' => 'R',
 493       's' => 'S',
 494       't' => 'T',
 495       'u' => 'U',
 496       'v' => 'V',
 497       'w' => 'W',
 498       'x' => 'X',
 499       'y' => 'Y',
 500       'z' => 'Z',
 501
 502       'A' => 'A',  X_B0 => X_B0,  X_C0 => X_C0,
 503       'B' => 'B',  X_B1 => X_B1,  X_C1 => X_C1,  X_A1 => X_A1,
 504       'C' => 'C',  X_B2 => X_B2,  X_C2 => X_C2,  X_A2 => X_A2,
 505       'D' => 'D',  X_B3 => X_B3,  X_C3 => X_C3,  X_A3 => X_A3,
 506       'E' => 'E',  X_B4 => X_B4,  X_C4 => X_C4,  X_A4 => X_A4,
 507       'F' => 'F',  X_B5 => X_B5,  X_C5 => X_C5,  X_A5 => X_A5,
 508       'G' => 'G',  X_B6 => X_B6,  X_C6 => X_C6,  X_A6 => X_A6,
 509       'H' => 'H',  X_B7 => X_B7,  X_C7 => X_C7,  X_A7 => X_A7,
 510       'I' => 'I',  X_B8 => X_B8,  X_C8 => X_C8,  X_A8 => X_A8,
 511       'J' => 'J',  X_B9 => X_B9,  X_C9 => X_C9,  X_A9 => X_A9,
 512       'K' => 'K',  X_BA => X_BA,  X_CA => X_CA,  X_AA => X_AA,
 513       'L' => 'L',  X_BB => X_BB,  X_CB => X_CB,  X_AB => X_AB,
 514       'M' => 'M',  X_BC => X_BC,  X_CC => X_CC,  X_AC => X_AC,
 515       'N' => 'N',  X_BD => X_BD,  X_CD => X_CD,
 516       'O' => 'O',  X_BE => X_BE,  X_CE => X_CE,  X_AE => X_AE,
 517       'P' => 'P',  X_BF => X_BF,  X_CF => X_CF,  X_AF => X_AF,
 518       'Q' => 'Q',
 519       'R' => 'R',
 520       'S' => 'S',
 521       'T' => 'T',
 522       'U' => 'U',
 523       'V' => 'V',
 524       'W' => 'W',
 525       'X' => 'X',
 526       'Y' => 'Y',
 527       'Z' => 'Z',
 528
 529       '0' => '0',
 530       '1' => '1',
 531       '2' => '2',
 532       '3' => '3',
 533       '4' => '4',
 534       '5' => '5',
 535       '6' => '6',
 536       '7' => '7',
 537       '8' => '8',
 538       '9' => '9',
 539
 540       '_' => '_',
 541
 542       others => ' ');
 543
 544    ------------------------------------------
 545    -- Definitions for Latin-9 (ISO 8859-9) --
 546    ------------------------------------------
 547
 548    Fold_Latin_9 : constant Translate_Table := Translate_Table'(
 549
 550       'a' => 'A',  X_E0 => X_C0,  X_F0 => X_D0,
 551       'b' => 'B',  X_E1 => X_C1,  X_F1 => X_D1,
 552       'c' => 'C',  X_E2 => X_C2,  X_F2 => X_D2,
 553       'd' => 'D',  X_E3 => X_C3,  X_F3 => X_D3,
 554       'e' => 'E',  X_E4 => X_C4,  X_F4 => X_D4,
 555       'f' => 'F',  X_E5 => X_C5,  X_F5 => X_D5,
 556       'g' => 'G',  X_E6 => X_C6,  X_F6 => X_D6,
 557       'h' => 'H',  X_E7 => X_C7,
 558       'i' => 'I',  X_E8 => X_C8,  X_F8 => X_D8,
 559       'j' => 'J',  X_E9 => X_C9,  X_F9 => X_D9,
 560       'k' => 'K',  X_EA => X_CA,  X_FA => X_DA,
 561       'l' => 'L',  X_EB => X_CB,  X_FB => X_DB,
 562       'm' => 'M',  X_EC => X_CC,  X_FC => X_DC,
 563       'n' => 'N',  X_ED => X_CD,  X_FD => X_DD,
 564       'o' => 'O',  X_EE => X_CE,  X_FE => X_DE,
 565       'p' => 'P',  X_EF => X_CF,
 566       'q' => 'Q',  X_A8 => X_A6,
 567       'r' => 'R',  X_B8 => X_B4,
 568       's' => 'S',  X_BD => X_BC,
 569       't' => 'T',  X_BE => X_FF,
 570       'u' => 'U',
 571       'v' => 'V',
 572       'w' => 'W',
 573       'x' => 'X',
 574       'y' => 'Y',
 575       'z' => 'Z',
 576
 577       'A' => 'A',  X_C0 => X_C0,  X_D0 => X_D0,
 578       'B' => 'B',  X_C1 => X_C1,  X_D1 => X_D1,
 579       'C' => 'C',  X_C2 => X_C2,  X_D2 => X_D2,
 580       'D' => 'D',  X_C3 => X_C3,  X_D3 => X_D3,
 581       'E' => 'E',  X_C4 => X_C4,  X_D4 => X_D4,
 582       'F' => 'F',  X_C5 => X_C5,  X_D5 => X_D5,
 583       'G' => 'G',  X_C6 => X_C6,  X_D6 => X_D6,
 584       'H' => 'H',  X_C7 => X_C7,
 585       'I' => 'I',  X_C8 => X_C8,  X_D8 => X_D8,
 586       'J' => 'J',  X_C9 => X_C9,  X_D9 => X_D9,
 587       'K' => 'K',  X_CA => X_CA,  X_DA => X_DA,
 588       'L' => 'L',  X_CB => X_CB,  X_DB => X_DB,
 589       'M' => 'M',  X_CC => X_CC,  X_DC => X_DC,
 590       'N' => 'N',  X_CD => X_CD,  X_DD => X_DD,
 591       'O' => 'O',  X_CE => X_CE,  X_DE => X_DE,
 592       'P' => 'P',  X_CF => X_CF,  X_DF => X_DF,  X_FF => X_FF,
 593       'Q' => 'Q',  X_A6 => X_A6,
 594       'R' => 'R',  X_B4 => X_B4,
 595       'S' => 'S',  X_BC => X_BC,
 596       'T' => 'T',
 597       'U' => 'U',
 598       'V' => 'V',
 599       'W' => 'W',
 600       'X' => 'X',
 601       'Y' => 'Y',
 602       'Z' => 'Z',
 603
 604       '0' => '0',
 605       '1' => '1',
 606       '2' => '2',
 607       '3' => '3',
 608       '4' => '4',
 609       '5' => '5',
 610       '6' => '6',
 611       '7' => '7',
 612       '8' => '8',
 613       '9' => '9',
 614
 615       '_' => '_',
 616
 617       others => ' ');
 618
 619    --------------------------------------------
 620    -- Definitions for IBM PC (Code Page 437) --
 621    --------------------------------------------
 622
 623    --  Note: Code page 437 is the typical default in DOS, Windows and OS/2
 624    --  for PC's in the US, it corresponds to the original PC character set.
 625    --  See also the definitions for code page 850.
 626
 627    Fold_IBM_PC_437 : constant Translate_Table := Translate_Table'(
 628
 629       'a' => 'A',
 630       'b' => 'B',
 631       'c' => 'C',
 632       'd' => 'D',
 633       'e' => 'E',
 634       'f' => 'F',
 635       'g' => 'G',
 636       'h' => 'H',
 637       'i' => 'I',
 638       'j' => 'J',
 639       'k' => 'K',
 640       'l' => 'L',
 641       'm' => 'M',
 642       'n' => 'N',
 643       'o' => 'O',
 644       'p' => 'P',
 645       'q' => 'Q',
 646       'r' => 'R',
 647       's' => 'S',
 648       't' => 'T',
 649       'u' => 'U',
 650       'v' => 'V',
 651       'w' => 'W',
 652       'x' => 'X',
 653       'y' => 'Y',
 654       'z' => 'Z',
 655
 656       'A' => 'A',
 657       'B' => 'B',
 658       'C' => 'C',
 659       'D' => 'D',
 660       'E' => 'E',
 661       'F' => 'F',
 662       'G' => 'G',
 663       'H' => 'H',
 664       'I' => 'I',
 665       'J' => 'J',
 666       'K' => 'K',
 667       'L' => 'L',
 668       'M' => 'M',
 669       'N' => 'N',
 670       'O' => 'O',
 671       'P' => 'P',
 672       'Q' => 'Q',
 673       'R' => 'R',
 674       'S' => 'S',
 675       'T' => 'T',
 676       'U' => 'U',
 677       'V' => 'V',
 678       'W' => 'W',
 679       'X' => 'X',
 680       'Y' => 'Y',
 681       'Z' => 'Z',
 682
 683       X_80 => X_80,  -- C cedilla
 684       X_81 => X_9A,  -- u umlaut
 685       X_82 => X_90,  -- e acute
 686       X_83 => X_83,  -- a circumflex
 687       X_84 => X_8E,  -- a umlaut
 688       X_85 => X_85,  -- a grave
 689       X_86 => X_8F,  -- a ring
 690       X_87 => X_80,  -- c cedilla
 691       X_88 => X_88,  -- e circumflex
 692       X_89 => X_89,  -- e umlaut
 693       X_8A => X_8A,  -- e grave
 694       X_8B => X_8B,  -- i umlaut
 695       X_8C => X_8C,  -- i circumflex
 696       X_8D => X_8D,  -- i grave
 697       X_8E => X_8E,  -- A umlaut
 698       X_8F => X_8F,  -- A ring
 699
 700       X_90 => X_90,  -- E acute
 701       X_91 => X_92,  -- ae
 702       X_92 => X_92,  -- AE
 703       X_93 => X_93,  -- o circumflex
 704       X_94 => X_99,  -- o umlaut
 705       X_95 => X_95,  -- o grave
 706       X_96 => X_96,  -- u circumflex
 707       X_97 => X_97,  -- u grave
 708       X_98 => X_98,  -- y umlaut
 709       X_99 => X_99,  -- O umlaut
 710       X_9A => X_9A,  -- U umlaut
 711
 712       X_A0 => X_A0,  -- a acute
 713       X_A1 => X_A1,  -- i acute
 714       X_A2 => X_A2,  -- o acute
 715       X_A3 => X_A3,  -- u acute
 716       X_A4 => X_A5,  -- n tilde
 717       X_A5 => X_A5,  -- N tilde
 718       X_A6 => X_A6,  -- a underline
 719       X_A7 => X_A7,  -- o underline
 720
 721       X_E0 => X_E0,  -- lower case alpha
 722       X_E1 => X_E1,  -- lower case beta
 723       X_E2 => X_E2,  -- upper case gamma
 724       X_E3 => X_E3,  -- lower case pi
 725       X_E4 => X_E4,  -- upper case sigma (lower/upper sigma not equivalent)
 726       X_E5 => X_E5,  -- lower case sigma (lower/upper sigma not equivalent)
 727       X_E6 => X_E6,  -- lower case mu
 728       X_E7 => X_E7,  -- lower case tau
 729       X_E8 => X_E8,  -- upper case phi   (lower/upper phi not equivalent)
 730       X_E9 => X_E9,  -- lower case theta
 731       X_EA => X_EA,  -- upper case omega
 732       X_EB => X_EB,  -- lower case delta
 733       X_ED => X_ED,  -- lower case phi   (lower/upper phi not equivalent)
 734       X_EE => X_EE,  -- lower case epsilon
 735
 736       X_FC => X_FC,  -- lower case eta
 737
 738       '0' => '0',
 739       '1' => '1',
 740       '2' => '2',
 741       '3' => '3',
 742       '4' => '4',
 743       '5' => '5',
 744       '6' => '6',
 745       '7' => '7',
 746       '8' => '8',
 747       '9' => '9',
 748
 749       '_' => '_',
 750
 751       others => ' ');
 752
 753    --------------------------------------------
 754    -- Definitions for IBM PC (Code Page 850) --
 755    --------------------------------------------
 756
 757    --  Note: Code page 850 is the typical default in DOS, Windows and OS/2
 758    --  for PC's in Europe, it is an extension of the original PC character
 759    --  set to include the additional characters defined in ISO Latin-1.
 760    --  See also the definitions for code page 437.
 761
 762    Fold_IBM_PC_850 : constant Translate_Table := Translate_Table'(
 763
 764       'a' => 'A',
 765       'b' => 'B',
 766       'c' => 'C',
 767       'd' => 'D',
 768       'e' => 'E',
 769       'f' => 'F',
 770       'g' => 'G',
 771       'h' => 'H',
 772       'i' => 'I',
 773       'j' => 'J',
 774       'k' => 'K',
 775       'l' => 'L',
 776       'm' => 'M',
 777       'n' => 'N',
 778       'o' => 'O',
 779       'p' => 'P',
 780       'q' => 'Q',
 781       'r' => 'R',
 782       's' => 'S',
 783       't' => 'T',
 784       'u' => 'U',
 785       'v' => 'V',
 786       'w' => 'W',
 787       'x' => 'X',
 788       'y' => 'Y',
 789       'z' => 'Z',
 790
 791       'A' => 'A',
 792       'B' => 'B',
 793       'C' => 'C',
 794       'D' => 'D',
 795       'E' => 'E',
 796       'F' => 'F',
 797       'G' => 'G',
 798       'H' => 'H',
 799       'I' => 'I',
 800       'J' => 'J',
 801       'K' => 'K',
 802       'L' => 'L',
 803       'M' => 'M',
 804       'N' => 'N',
 805       'O' => 'O',
 806       'P' => 'P',
 807       'Q' => 'Q',
 808       'R' => 'R',
 809       'S' => 'S',
 810       'T' => 'T',
 811       'U' => 'U',
 812       'V' => 'V',
 813       'W' => 'W',
 814       'X' => 'X',
 815       'Y' => 'Y',
 816       'Z' => 'Z',
 817
 818       X_80 => X_80,  -- C cedilla
 819       X_81 => X_9A,  -- u umlaut
 820       X_82 => X_90,  -- e acute
 821       X_83 => X_B6,  -- a circumflex
 822       X_84 => X_8E,  -- a umlaut
 823       X_85 => X_B7,  -- a grave
 824       X_86 => X_8F,  -- a ring
 825       X_87 => X_80,  -- c cedilla
 826       X_88 => X_D2,  -- e circumflex
 827       X_89 => X_D3,  -- e umlaut
 828       X_8A => X_D4,  -- e grave
 829       X_8B => X_D8,  -- i umlaut
 830       X_8C => X_D7,  -- i circumflex
 831       X_8D => X_DE,  -- i grave
 832       X_8E => X_8E,  -- A umlaut
 833       X_8F => X_8F,  -- A ring
 834
 835       X_90 => X_90,  -- E acute
 836       X_91 => X_92,  -- ae
 837       X_92 => X_92,  -- AE
 838       X_93 => X_E2,  -- o circumflex
 839       X_94 => X_99,  -- o umlaut
 840       X_95 => X_E3,  -- o grave
 841       X_96 => X_EA,  -- u circumflex
 842       X_97 => X_EB,  -- u grave
 843       X_98 => X_98,  -- y umlaut
 844       X_99 => X_99,  -- O umlaut
 845       X_9A => X_9A,  -- U umlaut
 846
 847       X_A0 => X_B5,  -- a acute
 848       X_A1 => X_D6,  -- i acute
 849       X_A2 => X_E0,  -- o acute
 850       X_A3 => X_E9,  -- u acute
 851       X_A4 => X_A5,  -- n tilde
 852       X_A5 => X_A5,  -- N tilde
 853       X_A6 => X_A6,  -- a underline
 854       X_A7 => X_A7,  -- o underline
 855
 856       X_B5 => X_B5,  -- A acute
 857       X_B6 => X_B6,  -- A circumflex
 858       X_B7 => X_B7,  -- A grave
 859
 860       X_C6 => X_C7,  -- a tilde
 861       X_C7 => X_C7,  -- A tilde
 862
 863       X_D0 => X_D1,  -- eth
 864       X_D1 => X_D1,  -- Eth
 865       X_D2 => X_D2,  -- E circumflex
 866       X_D3 => X_D3,  -- E umlaut
 867       X_D4 => X_D4,  -- E grave
 868       X_D5 => X_D5,  -- dotless i, no uppercase
 869       X_D6 => X_D6,  -- I acute
 870       X_D7 => X_D7,  -- I circumflex
 871       X_D8 => X_D8,  -- I umlaut
 872       X_DE => X_DE,  -- I grave
 873
 874       X_E0 => X_E0,  -- O acute
 875       X_E1 => X_E1,  -- german dbl s, no uppercase
 876       X_E2 => X_E2,  -- O circumflex
 877       X_E3 => X_E3,  -- O grave
 878       X_E4 => X_E4,  -- o tilde
 879       X_E5 => X_E5,  -- O tilde
 880       X_E7 => X_E8,  -- thorn
 881       X_E8 => X_E8,  -- Thorn
 882       X_E9 => X_E9,  -- U acute
 883       X_EA => X_EA,  -- U circumflex
 884       X_EB => X_EB,  -- U grave
 885       X_EC => X_ED,  -- y acute
 886       X_ED => X_ED,  -- Y acute
 887
 888       '0' => '0',
 889       '1' => '1',
 890       '2' => '2',
 891       '3' => '3',
 892       '4' => '4',
 893       '5' => '5',
 894       '6' => '6',
 895       '7' => '7',
 896       '8' => '8',
 897       '9' => '9',
 898
 899       '_' => '_',
 900
 901       others => ' ');
 902
 903    -----------------------------------------
 904    -- Definitions for Full Upper Half Set --
 905    -----------------------------------------
 906
 907    --  The full upper half set allows all upper half characters as letters,
 908    --  and does not recognize any upper/lower case equivalences in this half.
 909
 910    Fold_Full_Upper_Half : constant Translate_Table := Translate_Table'(
 911
 912       'a' => 'A',
 913       'b' => 'B',
 914       'c' => 'C',
 915       'd' => 'D',
 916       'e' => 'E',
 917       'f' => 'F',
 918       'g' => 'G',
 919       'h' => 'H',
 920       'i' => 'I',
 921       'j' => 'J',
 922       'k' => 'K',
 923       'l' => 'L',
 924       'm' => 'M',
 925       'n' => 'N',
 926       'o' => 'O',
 927       'p' => 'P',
 928       'q' => 'Q',
 929       'r' => 'R',
 930       's' => 'S',
 931       't' => 'T',
 932       'u' => 'U',
 933       'v' => 'V',
 934       'w' => 'W',
 935       'x' => 'X',
 936       'y' => 'Y',
 937       'z' => 'Z',
 938
 939       'A' => 'A',
 940       'B' => 'B',
 941       'C' => 'C',
 942       'D' => 'D',
 943       'E' => 'E',
 944       'F' => 'F',
 945       'G' => 'G',
 946       'H' => 'H',
 947       'I' => 'I',
 948       'J' => 'J',
 949       'K' => 'K',
 950       'L' => 'L',
 951       'M' => 'M',
 952       'N' => 'N',
 953       'O' => 'O',
 954       'P' => 'P',
 955       'Q' => 'Q',
 956       'R' => 'R',
 957       'S' => 'S',
 958       'T' => 'T',
 959       'U' => 'U',
 960       'V' => 'V',
 961       'W' => 'W',
 962       'X' => 'X',
 963       'Y' => 'Y',
 964       'Z' => 'Z',
 965
 966       X_80 => X_80,  X_90 => X_90,  X_A0 => X_A0,  X_B0 => X_B0,
 967       X_81 => X_81,  X_91 => X_91,  X_A1 => X_A1,  X_B1 => X_B1,
 968       X_82 => X_82,  X_92 => X_92,  X_A2 => X_A2,  X_B2 => X_B2,
 969       X_83 => X_83,  X_93 => X_93,  X_A3 => X_A3,  X_B3 => X_B3,
 970       X_84 => X_84,  X_94 => X_94,  X_A4 => X_A4,  X_B4 => X_B4,
 971       X_85 => X_85,  X_95 => X_95,  X_A5 => X_A5,  X_B5 => X_B5,
 972       X_86 => X_86,  X_96 => X_96,  X_A6 => X_A6,  X_B6 => X_B6,
 973       X_87 => X_87,  X_97 => X_97,  X_A7 => X_A7,  X_B7 => X_B7,
 974       X_88 => X_88,  X_98 => X_98,  X_A8 => X_A8,  X_B8 => X_B8,
 975       X_89 => X_89,  X_99 => X_99,  X_A9 => X_A9,  X_B9 => X_B9,
 976       X_8A => X_8A,  X_9A => X_9A,  X_AA => X_AA,  X_BA => X_BA,
 977       X_8B => X_8B,  X_9B => X_9B,  X_AB => X_AB,  X_BB => X_BB,
 978       X_8C => X_8C,  X_9C => X_9C,  X_AC => X_AC,  X_BC => X_BC,
 979       X_8D => X_8D,  X_9D => X_9D,  X_AD => X_AD,  X_BD => X_BD,
 980       X_8E => X_8E,  X_9E => X_9E,  X_AE => X_AE,  X_BE => X_BE,
 981       X_8F => X_8F,  X_9F => X_9F,  X_AF => X_AF,  X_BF => X_BF,
 982
 983       X_C0 => X_C0,  X_D0 => X_D0,  X_E0 => X_E0,  X_F0 => X_F0,
 984       X_C1 => X_C1,  X_D1 => X_D1,  X_E1 => X_E1,  X_F1 => X_F1,
 985       X_C2 => X_C2,  X_D2 => X_D2,  X_E2 => X_E2,  X_F2 => X_F2,
 986       X_C3 => X_C3,  X_D3 => X_D3,  X_E3 => X_E3,  X_F3 => X_F3,
 987       X_C4 => X_C4,  X_D4 => X_D4,  X_E4 => X_E4,  X_F4 => X_F4,
 988       X_C5 => X_C5,  X_D5 => X_D5,  X_E5 => X_E5,  X_F5 => X_F5,
 989       X_C6 => X_C6,  X_D6 => X_D6,  X_E6 => X_E6,  X_F6 => X_F6,
 990       X_C7 => X_C7,  X_D7 => X_D7,  X_E7 => X_E7,  X_F7 => X_F7,
 991       X_C8 => X_C8,  X_D8 => X_D8,  X_E8 => X_E8,  X_F8 => X_F8,
 992       X_C9 => X_C9,  X_D9 => X_D9,  X_E9 => X_E9,  X_F9 => X_F9,
 993       X_CA => X_CA,  X_DA => X_DA,  X_EA => X_EA,  X_FA => X_FA,
 994       X_CB => X_CB,  X_DB => X_DB,  X_EB => X_EB,  X_FB => X_FB,
 995       X_CC => X_CC,  X_DC => X_DC,  X_EC => X_EC,  X_FC => X_FC,
 996       X_CD => X_CD,  X_DD => X_DD,  X_ED => X_ED,  X_FD => X_FD,
 997       X_CE => X_CE,  X_DE => X_DE,  X_EE => X_EE,  X_FE => X_FE,
 998       X_CF => X_CF,  X_DF => X_DF,  X_EF => X_EF,  X_FF => X_FF,
 999
1000       '0' => '0',
1001       '1' => '1',
1002       '2' => '2',
1003       '3' => '3',
1004       '4' => '4',
1005       '5' => '5',
1006       '6' => '6',
1007       '7' => '7',
1008       '8' => '8',
1009       '9' => '9',
1010
1011       '_' => '_',
1012
1013       others => ' ');
1014
1015    ---------------------------------------
1016    -- Definitions for No Upper Half Set --
1017    ---------------------------------------
1018
1019    --  The no upper half set allows no upper half characters as letters, and
1020    --  thus there are no upper/lower case equivalences in this half. This set
1021    --  corresponds to the Ada 83 rules.
1022
1023    Fold_No_Upper_Half : constant Translate_Table := Translate_Table'(
1024
1025       'a' => 'A',
1026       'b' => 'B',
1027       'c' => 'C',
1028       'd' => 'D',
1029       'e' => 'E',
1030       'f' => 'F',
1031       'g' => 'G',
1032       'h' => 'H',
1033       'i' => 'I',
1034       'j' => 'J',
1035       'k' => 'K',
1036       'l' => 'L',
1037       'm' => 'M',
1038       'n' => 'N',
1039       'o' => 'O',
1040       'p' => 'P',
1041       'q' => 'Q',
1042       'r' => 'R',
1043       's' => 'S',
1044       't' => 'T',
1045       'u' => 'U',
1046       'v' => 'V',
1047       'w' => 'W',
1048       'x' => 'X',
1049       'y' => 'Y',
1050       'z' => 'Z',
1051
1052       'A' => 'A',
1053       'B' => 'B',
1054       'C' => 'C',
1055       'D' => 'D',
1056       'E' => 'E',
1057       'F' => 'F',
1058       'G' => 'G',
1059       'H' => 'H',
1060       'I' => 'I',
1061       'J' => 'J',
1062       'K' => 'K',
1063       'L' => 'L',
1064       'M' => 'M',
1065       'N' => 'N',
1066       'O' => 'O',
1067       'P' => 'P',
1068       'Q' => 'Q',
1069       'R' => 'R',
1070       'S' => 'S',
1071       'T' => 'T',
1072       'U' => 'U',
1073       'V' => 'V',
1074       'W' => 'W',
1075       'X' => 'X',
1076       'Y' => 'Y',
1077       'Z' => 'Z',
1078
1079       '0' => '0',
1080       '1' => '1',
1081       '2' => '2',
1082       '3' => '3',
1083       '4' => '4',
1084       '5' => '5',
1085       '6' => '6',
1086       '7' => '7',
1087       '8' => '8',
1088       '9' => '9',
1089
1090       '_' => '_',
1091
1092       others => ' ');
1093
1094    ----------------
1095    -- Initialize --
1096    ----------------
1097
1098    procedure Initialize is
1099    begin
1100       --  Set Fold_Upper table from source code indication
1101
1102       if Identifier_Character_Set = '1'
1103         or else Identifier_Character_Set = 'w'
1104       then
1105          Fold_Upper := Fold_Latin_1;
1106
1107       elsif Identifier_Character_Set = '2' then
1108          Fold_Upper := Fold_Latin_2;
1109
1110       elsif Identifier_Character_Set = '3' then
1111          Fold_Upper := Fold_Latin_3;
1112
1113       elsif Identifier_Character_Set = '4' then
1114          Fold_Upper := Fold_Latin_4;
1115
1116       elsif Identifier_Character_Set = '5' then
1117          Fold_Upper := Fold_Latin_5;
1118
1119       elsif Identifier_Character_Set = 'p' then
1120          Fold_Upper := Fold_IBM_PC_437;
1121
1122       elsif Identifier_Character_Set = '8' then
1123          Fold_Upper := Fold_IBM_PC_850;
1124
1125       elsif Identifier_Character_Set = '9' then
1126          Fold_Upper := Fold_Latin_9;
1127
1128       elsif Identifier_Character_Set = 'f' then
1129          Fold_Upper := Fold_Full_Upper_Half;
1130
1131       else -- Identifier_Character_Set = 'n'
1132          Fold_Upper := Fold_No_Upper_Half;
1133       end if;
1134
1135       --  Use Fold_Upper table to compute Fold_Lower table
1136
1137       Fold_Lower := Fold_Upper;
1138
1139       for J in Character loop
1140          if J /= Fold_Upper (J) then
1141             Fold_Lower (Fold_Upper (J)) := J;
1142             Fold_Lower (J) := J;
1143          end if;
1144       end loop;
1145
1146       Fold_Lower (' ') := ' ';
1147
1148       --  Build Identifier_Char table from used entries of Fold_Upper
1149
1150       for J in Character loop
1151          Identifier_Char (J) := (Fold_Upper (J) /= ' ');
1152       end loop;
1153
1154       --  Always add [ as an identifier character to deal with the brackets
1155       --  notation for wide characters used in identifiers. Note that if
1156       --  we are not allowing wide characters in identifiers, then any use
1157       --  of this notation will be flagged as an error in Scan_Identifier.
1158
1159       Identifier_Char ('[') := True;
1160
1161       --  Add entry for ESC if wide characters in use with a wide character
1162       --  encoding method active that uses the ESC code for encoding.
1163
1164       if Identifier_Character_Set = 'w'
1165         and then Wide_Character_Encoding_Method in WC_ESC_Encoding_Method
1166       then
1167          Identifier_Char (ASCII.ESC) := True;
1168       end if;
1169    end Initialize;
1170
1171    --------------------------
1172    -- Is_Lower_Case_Letter --
1173    --------------------------
1174
1175    function Is_Lower_Case_Letter (C : Character) return Boolean is
1176    begin
1177       return C /= Fold_Upper (C);
1178    end Is_Lower_Case_Letter;
1179
1180    --------------------------
1181    -- Is_Upper_Case_Letter --
1182    --------------------------
1183
1184    function Is_Upper_Case_Letter (C : Character) return Boolean is
1185    begin
1186       return C /= Fold_Lower (C);
1187    end Is_Upper_Case_Letter;
1188
1189 end Csets;