gcc/ada/s-wwdenu.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUN-TIME COMPONENTS                         --
   4 --                                                                          --
   5 --                      S Y S T E M . W W D _ E N U M                       --
   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,  51  Franklin  Street,  Fifth  Floor, --
  20 -- Boston, MA 02110-1301, 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 System.WCh_StW; use System.WCh_StW;
  35 with System.WCh_Con; use System.WCh_Con;
  36
  37 with Unchecked_Conversion;
  38
  39 package body System.WWd_Enum is
  40
  41    -----------------------------------
  42    -- Wide_Wide_Width_Enumeration_8 --
  43    -----------------------------------
  44
  45    function Wide_Wide_Width_Enumeration_8
  46      (Names   : String;
  47       Indexes : System.Address;
  48       Lo, Hi  : Natural;
  49       EM      : WC_Encoding_Method) return Natural
  50    is
  51       W : Natural;
  52
  53       type Natural_8 is range 0 .. 2 ** 7 - 1;
  54       type Index_Table is array (Natural) of Natural_8;
  55       type Index_Table_Ptr is access Index_Table;
  56
  57       function To_Index_Table_Ptr is
  58         new Unchecked_Conversion (System.Address, Index_Table_Ptr);
  59
  60       IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
  61
  62    begin
  63       W := 0;
  64       for J in Lo .. Hi loop
  65          declare
  66             WS : constant Wide_Wide_String :=
  67                    String_To_Wide_Wide_String
  68                      (Names (Natural (IndexesT (J)) ..
  69                              Natural (IndexesT (J + 1)) - 1), EM);
  70          begin
  71             W := Natural'Max (W, WS'Length);
  72          end;
  73       end loop;
  74
  75       return W;
  76    end Wide_Wide_Width_Enumeration_8;
  77
  78    ------------------------------------
  79    -- Wide_Wide_Width_Enumeration_16 --
  80    ------------------------------------
  81
  82    function Wide_Wide_Width_Enumeration_16
  83      (Names   : String;
  84       Indexes : System.Address;
  85       Lo, Hi  : Natural;
  86       EM      : WC_Encoding_Method) return Natural
  87    is
  88       W : Natural;
  89
  90       type Natural_16 is range 0 .. 2 ** 15 - 1;
  91       type Index_Table is array (Natural) of Natural_16;
  92       type Index_Table_Ptr is access Index_Table;
  93
  94       function To_Index_Table_Ptr is
  95         new Unchecked_Conversion (System.Address, Index_Table_Ptr);
  96
  97       IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
  98
  99    begin
 100       W := 0;
 101       for J in Lo .. Hi loop
 102          declare
 103             WS : constant Wide_Wide_String :=
 104                    String_To_Wide_Wide_String
 105                      (Names (Natural (IndexesT (J)) ..
 106                              Natural (IndexesT (J + 1)) - 1), EM);
 107          begin
 108             W := Natural'Max (W, WS'Length);
 109          end;
 110       end loop;
 111
 112       return W;
 113    end Wide_Wide_Width_Enumeration_16;
 114
 115    ------------------------------------
 116    -- Wide_Wide_Width_Enumeration_32 --
 117    ------------------------------------
 118
 119    function Wide_Wide_Width_Enumeration_32
 120      (Names   : String;
 121       Indexes : System.Address;
 122       Lo, Hi  : Natural;
 123       EM      : WC_Encoding_Method) return Natural
 124    is
 125       W : Natural;
 126
 127       type Natural_32 is range 0 .. 2 ** 31 - 1;
 128       type Index_Table is array (Natural) of Natural_32;
 129       type Index_Table_Ptr is access Index_Table;
 130
 131       function To_Index_Table_Ptr is
 132         new Unchecked_Conversion (System.Address, Index_Table_Ptr);
 133
 134       IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
 135
 136    begin
 137       W := 0;
 138       for J in Lo .. Hi loop
 139          declare
 140             WS : constant Wide_Wide_String :=
 141                    String_To_Wide_Wide_String
 142                      (Names (Natural (IndexesT (J)) ..
 143                              Natural (IndexesT (J + 1)) - 1), EM);
 144          begin
 145             W := Natural'Max (W, WS'Length);
 146          end;
 147       end loop;
 148
 149       return W;
 150    end Wide_Wide_Width_Enumeration_32;
 151
 152    ------------------------------
 153    -- Wide_Width_Enumeration_8 --
 154    ------------------------------
 155
 156    function Wide_Width_Enumeration_8
 157      (Names   : String;
 158       Indexes : System.Address;
 159       Lo, Hi  : Natural;
 160       EM      : WC_Encoding_Method) return Natural
 161    is
 162       W : Natural;
 163
 164       type Natural_8 is range 0 .. 2 ** 7 - 1;
 165       type Index_Table is array (Natural) of Natural_8;
 166       type Index_Table_Ptr is access Index_Table;
 167
 168       function To_Index_Table_Ptr is
 169         new Unchecked_Conversion (System.Address, Index_Table_Ptr);
 170
 171       IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
 172
 173    begin
 174       W := 0;
 175       for J in Lo .. Hi loop
 176          declare
 177             WS : constant Wide_String :=
 178                    String_To_Wide_String
 179                      (Names (Natural (IndexesT (J)) ..
 180                              Natural (IndexesT (J + 1)) - 1), EM);
 181          begin
 182             W := Natural'Max (W, WS'Length);
 183          end;
 184       end loop;
 185
 186       return W;
 187    end Wide_Width_Enumeration_8;
 188
 189    -------------------------------
 190    -- Wide_Width_Enumeration_16 --
 191    -------------------------------
 192
 193    function Wide_Width_Enumeration_16
 194      (Names   : String;
 195       Indexes : System.Address;
 196       Lo, Hi  : Natural;
 197       EM      : WC_Encoding_Method) return Natural
 198    is
 199       W : Natural;
 200
 201       type Natural_16 is range 0 .. 2 ** 15 - 1;
 202       type Index_Table is array (Natural) of Natural_16;
 203       type Index_Table_Ptr is access Index_Table;
 204
 205       function To_Index_Table_Ptr is
 206         new Unchecked_Conversion (System.Address, Index_Table_Ptr);
 207
 208       IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
 209
 210    begin
 211       W := 0;
 212       for J in Lo .. Hi loop
 213          declare
 214             WS : constant Wide_String :=
 215                    String_To_Wide_String
 216                      (Names (Natural (IndexesT (J)) ..
 217                              Natural (IndexesT (J + 1)) - 1), EM);
 218          begin
 219             W := Natural'Max (W, WS'Length);
 220          end;
 221       end loop;
 222
 223       return W;
 224    end Wide_Width_Enumeration_16;
 225
 226    -------------------------------
 227    -- Wide_Width_Enumeration_32 --
 228    -------------------------------
 229
 230    function Wide_Width_Enumeration_32
 231      (Names   : String;
 232       Indexes : System.Address;
 233       Lo, Hi  : Natural;
 234       EM      : WC_Encoding_Method) return Natural
 235    is
 236       W : Natural;
 237
 238       type Natural_32 is range 0 .. 2 ** 31 - 1;
 239       type Index_Table is array (Natural) of Natural_32;
 240       type Index_Table_Ptr is access Index_Table;
 241
 242       function To_Index_Table_Ptr is
 243         new Unchecked_Conversion (System.Address, Index_Table_Ptr);
 244
 245       IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
 246
 247    begin
 248       W := 0;
 249       for J in Lo .. Hi loop
 250          declare
 251             WS : constant Wide_String :=
 252                    String_To_Wide_String
 253                      (Names (Natural (IndexesT (J)) ..
 254                              Natural (IndexesT (J + 1)) - 1), EM);
 255          begin
 256             W := Natural'Max (W, WS'Length);
 257          end;
 258       end loop;
 259
 260       return W;
 261    end Wide_Width_Enumeration_32;
 262
 263 end System.WWd_Enum;