[thirdparty/gcc.git] / gcc / ada / libgnat / s-valenu.adb

------------------------------------------------------------------------------
--                                                                          --
--                         GNAT COMPILER COMPONENTS                         --
--                                                                          --
--                      S Y S T E M . V A L _ E N U M                       --
--                                                                          --
--                                 B o d y                                  --
--                                                                          --
--          Copyright (C) 1992-2020, 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 3,  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.                                     --
--                                                                          --
-- As a special exception under Section 7 of GPL version 3, you are granted --
-- additional permissions described in the GCC Runtime Library Exception,   --
-- version 3.1, as published by the Free Software Foundation.               --
--                                                                          --
-- You should have received a copy of the GNU General Public License and    --
-- a copy of the GCC Runtime Library Exception along with this program;     --
-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
-- <http://www.gnu.org/licenses/>.                                          --
--                                                                          --
-- GNAT was originally developed  by the GNAT team at  New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc.      --
--                                                                          --
------------------------------------------------------------------------------

with Ada.Unchecked_Conversion;

with System.Val_Util; use System.Val_Util;

package body System.Val_Enum is

   -------------------------
   -- Value_Enumeration_8 --
   -------------------------

   function Value_Enumeration_8
     (Names   : String;
      Indexes : System.Address;
      Num     : Natural;
      Str     : String)
      return    Natural
   is
      F : Natural;
      L : Natural;
      S : String (Str'Range) := Str;

      type Natural_8 is range 0 .. 2 ** 7 - 1;
      type Index_Table is array (Natural) of Natural_8;
      type Index_Table_Ptr is access Index_Table;

      function To_Index_Table_Ptr is
        new Ada.Unchecked_Conversion (System.Address, Index_Table_Ptr);

      IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);

   begin
      Normalize_String (S, F, L);

      for J in 0 .. Num loop
         if Names
           (Natural (IndexesT (J)) ..
            Natural (IndexesT (J + 1)) - 1) = S (F .. L)
         then
            return J;
         end if;
      end loop;

      Bad_Value (Str);
   end Value_Enumeration_8;

   --------------------------
   -- Value_Enumeration_16 --
   --------------------------

   function Value_Enumeration_16
     (Names   : String;
      Indexes : System.Address;
      Num     : Natural;
      Str     : String)
      return    Natural
   is
      F : Natural;
      L : Natural;
      S : String (Str'Range) := Str;

      type Natural_16 is range 0 .. 2 ** 15 - 1;
      type Index_Table is array (Natural) of Natural_16;
      type Index_Table_Ptr is access Index_Table;

      function To_Index_Table_Ptr is
        new Ada.Unchecked_Conversion (System.Address, Index_Table_Ptr);

      IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);

   begin
      Normalize_String (S, F, L);

      for J in 0 .. Num loop
         if Names
           (Natural (IndexesT (J)) ..
            Natural (IndexesT (J + 1)) - 1) = S (F .. L)
         then
            return J;
         end if;
      end loop;

      Bad_Value (Str);
   end Value_Enumeration_16;

   --------------------------
   -- Value_Enumeration_32 --
   --------------------------

   function Value_Enumeration_32
     (Names   : String;
      Indexes : System.Address;
      Num     : Natural;
      Str     : String)
      return    Natural
   is
      F : Natural;
      L : Natural;
      S : String (Str'Range) := Str;

      type Natural_32 is range 0 .. 2 ** 31 - 1;
      type Index_Table is array (Natural) of Natural_32;
      type Index_Table_Ptr is access Index_Table;

      function To_Index_Table_Ptr is
        new Ada.Unchecked_Conversion (System.Address, Index_Table_Ptr);

      IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);

   begin
      Normalize_String (S, F, L);

      for J in 0 .. Num loop
         if Names
           (Natural (IndexesT (J)) ..
            Natural (IndexesT (J + 1)) - 1) = S (F .. L)
         then
            return J;
         end if;
      end loop;

      Bad_Value (Str);
   end Value_Enumeration_32;

end System.Val_Enum;
Commit	Line	Data
cacbc350 RK	1	------------------------------------------------------------------------------
	2	-- --
	3	-- GNAT COMPILER COMPONENTS --
	4	-- --
	5	-- S Y S T E M . V A L _ E N U M --
	6	-- --
	7	-- B o d y --
	8	-- --
4b490c1e	9	-- Copyright (C) 1992-2020, Free Software Foundation, Inc. --
cacbc350 RK	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- --
748086b7	13	-- ware Foundation; either version 3, or (at your option) any later ver- --
cacbc350 RK	14	-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
cacbc350 RK	15	-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
748086b7 JJ	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/>. --
cacbc350 RK	26	-- --
cacbc350 RK	27	-- GNAT was originally developed by the GNAT team at New York University. --
71ff80dc	28	-- Extensive contributions were provided by Ada Core Technologies Inc. --
cacbc350 RK	29	-- --
	30	------------------------------------------------------------------------------
	31
cecaf88a	32	with Ada.Unchecked_Conversion;
37ae92c4	33
cacbc350 RK	34	with System.Val_Util; use System.Val_Util;
	35
	36	package body System.Val_Enum is
	37
	38	-------------------------
	39	-- Value_Enumeration_8 --
	40	-------------------------
	41
	42	function Value_Enumeration_8
	43	(Names : String;
	44	Indexes : System.Address;
	45	Num : Natural;
	46	Str : String)
	47	return Natural
	48	is
	49	F : Natural;
	50	L : Natural;
	51	S : String (Str'Range) := Str;
	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
cecaf88a	58	new Ada.Unchecked_Conversion (System.Address, Index_Table_Ptr);
cacbc350 RK	59
	60	IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
	61
	62	begin
	63	Normalize_String (S, F, L);
	64
	65	for J in 0 .. Num loop
	66	if Names
	67	(Natural (IndexesT (J)) ..
	68	Natural (IndexesT (J + 1)) - 1) = S (F .. L)
	69	then
	70	return J;
	71	end if;
	72	end loop;
	73
37ae92c4	74	Bad_Value (Str);
cacbc350 RK	75	end Value_Enumeration_8;
	76
	77	--------------------------
	78	-- Value_Enumeration_16 --
	79	--------------------------
	80
	81	function Value_Enumeration_16
	82	(Names : String;
	83	Indexes : System.Address;
	84	Num : Natural;
	85	Str : String)
	86	return Natural
	87	is
	88	F : Natural;
	89	L : Natural;
	90	S : String (Str'Range) := Str;
	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
cecaf88a	97	new Ada.Unchecked_Conversion (System.Address, Index_Table_Ptr);
cacbc350 RK	98
	99	IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
	100
	101	begin
	102	Normalize_String (S, F, L);
	103
	104	for J in 0 .. Num loop
	105	if Names
	106	(Natural (IndexesT (J)) ..
	107	Natural (IndexesT (J + 1)) - 1) = S (F .. L)
	108	then
	109	return J;
	110	end if;
	111	end loop;
	112
37ae92c4	113	Bad_Value (Str);
cacbc350 RK	114	end Value_Enumeration_16;
	115
	116	--------------------------
	117	-- Value_Enumeration_32 --
	118	--------------------------
	119
	120	function Value_Enumeration_32
	121	(Names : String;
	122	Indexes : System.Address;
	123	Num : Natural;
	124	Str : String)
	125	return Natural
	126	is
	127	F : Natural;
	128	L : Natural;
	129	S : String (Str'Range) := Str;
	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
cecaf88a	136	new Ada.Unchecked_Conversion (System.Address, Index_Table_Ptr);
cacbc350 RK	137
	138	IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
	139
	140	begin
	141	Normalize_String (S, F, L);
	142
	143	for J in 0 .. Num loop
	144	if Names
	145	(Natural (IndexesT (J)) ..
	146	Natural (IndexesT (J + 1)) - 1) = S (F .. L)
	147	then
	148	return J;
	149	end if;
	150	end loop;
	151
37ae92c4	152	Bad_Value (Str);
cacbc350 RK	153	end Value_Enumeration_32;
	154
	155	end System.Val_Enum;