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) 1992-2007, Free Software Foundation, Inc.         --
  10 --                                                                          --
  11 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
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  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 --
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  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 Ada.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 Ada.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             S  : constant String :=
  67                    Names (Natural (IndexesT (J)) ..
  68                           Natural (IndexesT (J + 1)) - 1);
  69             WS : Wide_Wide_String (1 .. S'Length);
  70             L  : Natural;
  71          begin
  72             String_To_Wide_Wide_String (S, WS, L, EM);
  73             W := Natural'Max (W, L);
  74          end;
  75       end loop;
  76
  77       return W;
  78    end Wide_Wide_Width_Enumeration_8;
  79
  80    ------------------------------------
  81    -- Wide_Wide_Width_Enumeration_16 --
  82    ------------------------------------
  83
  84    function Wide_Wide_Width_Enumeration_16
  85      (Names   : String;
  86       Indexes : System.Address;
  87       Lo, Hi  : Natural;
  88       EM      : WC_Encoding_Method) return Natural
  89    is
  90       W : Natural;
  91
  92       type Natural_16 is range 0 .. 2 ** 15 - 1;
  93       type Index_Table is array (Natural) of Natural_16;
  94       type Index_Table_Ptr is access Index_Table;
  95
  96       function To_Index_Table_Ptr is
  97         new Ada.Unchecked_Conversion (System.Address, Index_Table_Ptr);
  98
  99       IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
 100
 101    begin
 102       W := 0;
 103       for J in Lo .. Hi loop
 104          declare
 105             S  : constant String :=
 106                    Names (Natural (IndexesT (J)) ..
 107                           Natural (IndexesT (J + 1)) - 1);
 108             WS : Wide_Wide_String (1 .. S'Length);
 109             L  : Natural;
 110          begin
 111             String_To_Wide_Wide_String (S, WS, L, EM);
 112             W := Natural'Max (W, L);
 113          end;
 114       end loop;
 115
 116       return W;
 117    end Wide_Wide_Width_Enumeration_16;
 118
 119    ------------------------------------
 120    -- Wide_Wide_Width_Enumeration_32 --
 121    ------------------------------------
 122
 123    function Wide_Wide_Width_Enumeration_32
 124      (Names   : String;
 125       Indexes : System.Address;
 126       Lo, Hi  : Natural;
 127       EM      : WC_Encoding_Method) return Natural
 128    is
 129       W : Natural;
 130
 131       type Natural_32 is range 0 .. 2 ** 31 - 1;
 132       type Index_Table is array (Natural) of Natural_32;
 133       type Index_Table_Ptr is access Index_Table;
 134
 135       function To_Index_Table_Ptr is
 136         new Ada.Unchecked_Conversion (System.Address, Index_Table_Ptr);
 137
 138       IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
 139
 140    begin
 141       W := 0;
 142       for J in Lo .. Hi loop
 143          declare
 144             S  : constant String :=
 145                    Names (Natural (IndexesT (J)) ..
 146                           Natural (IndexesT (J + 1)) - 1);
 147             WS : Wide_Wide_String (1 .. S'Length);
 148             L  : Natural;
 149          begin
 150             String_To_Wide_Wide_String (S, WS, L, EM);
 151             W := Natural'Max (W, L);
 152          end;
 153       end loop;
 154
 155       return W;
 156    end Wide_Wide_Width_Enumeration_32;
 157
 158    ------------------------------
 159    -- Wide_Width_Enumeration_8 --
 160    ------------------------------
 161
 162    function Wide_Width_Enumeration_8
 163      (Names   : String;
 164       Indexes : System.Address;
 165       Lo, Hi  : Natural;
 166       EM      : WC_Encoding_Method) return Natural
 167    is
 168       W : Natural;
 169
 170       type Natural_8 is range 0 .. 2 ** 7 - 1;
 171       type Index_Table is array (Natural) of Natural_8;
 172       type Index_Table_Ptr is access Index_Table;
 173
 174       function To_Index_Table_Ptr is
 175         new Ada.Unchecked_Conversion (System.Address, Index_Table_Ptr);
 176
 177       IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
 178
 179    begin
 180       W := 0;
 181       for J in Lo .. Hi loop
 182          declare
 183             S  : constant String :=
 184                    Names (Natural (IndexesT (J)) ..
 185                           Natural (IndexesT (J + 1)) - 1);
 186             WS : Wide_String (1 .. S'Length);
 187             L  : Natural;
 188          begin
 189             String_To_Wide_String (S, WS, L, EM);
 190             W := Natural'Max (W, L);
 191          end;
 192       end loop;
 193
 194       return W;
 195    end Wide_Width_Enumeration_8;
 196
 197    -------------------------------
 198    -- Wide_Width_Enumeration_16 --
 199    -------------------------------
 200
 201    function Wide_Width_Enumeration_16
 202      (Names   : String;
 203       Indexes : System.Address;
 204       Lo, Hi  : Natural;
 205       EM      : WC_Encoding_Method) return Natural
 206    is
 207       W : Natural;
 208
 209       type Natural_16 is range 0 .. 2 ** 15 - 1;
 210       type Index_Table is array (Natural) of Natural_16;
 211       type Index_Table_Ptr is access Index_Table;
 212
 213       function To_Index_Table_Ptr is
 214         new Ada.Unchecked_Conversion (System.Address, Index_Table_Ptr);
 215
 216       IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
 217
 218    begin
 219       W := 0;
 220       for J in Lo .. Hi loop
 221          declare
 222             S  : constant String :=
 223                    Names (Natural (IndexesT (J)) ..
 224                           Natural (IndexesT (J + 1)) - 1);
 225             WS : Wide_String (1 .. S'Length);
 226             L  : Natural;
 227          begin
 228             String_To_Wide_String (S, WS, L, EM);
 229             W := Natural'Max (W, L);
 230          end;
 231       end loop;
 232
 233       return W;
 234    end Wide_Width_Enumeration_16;
 235
 236    -------------------------------
 237    -- Wide_Width_Enumeration_32 --
 238    -------------------------------
 239
 240    function Wide_Width_Enumeration_32
 241      (Names   : String;
 242       Indexes : System.Address;
 243       Lo, Hi  : Natural;
 244       EM      : WC_Encoding_Method) return Natural
 245    is
 246       W : Natural;
 247
 248       type Natural_32 is range 0 .. 2 ** 31 - 1;
 249       type Index_Table is array (Natural) of Natural_32;
 250       type Index_Table_Ptr is access Index_Table;
 251
 252       function To_Index_Table_Ptr is
 253         new Ada.Unchecked_Conversion (System.Address, Index_Table_Ptr);
 254
 255       IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
 256
 257    begin
 258       W := 0;
 259       for J in Lo .. Hi loop
 260          declare
 261             S  : constant String :=
 262                    Names (Natural (IndexesT (J)) ..
 263                           Natural (IndexesT (J + 1)) - 1);
 264             WS : Wide_String (1 .. S'Length);
 265             L  : Natural;
 266          begin
 267             String_To_Wide_String (S, WS, L, EM);
 268             W := Natural'Max (W, L);
 269          end;
 270       end loop;
 271
 272       return W;
 273    end Wide_Width_Enumeration_32;
 274
 275 end System.WWd_Enum;