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1 ------------------------------------------------------------------------------
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2 -- --
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3 -- GNAT COMPILER COMPONENTS --
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4 -- --
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5 -- S Y S T E M . W C H _ C O N --
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6 -- --
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7 -- B o d y --
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8 -- --
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9 -- Copyright (C) 2005-2017, Free Software Foundation, Inc. --
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10 -- --
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11 -- GNAT is free software; you can redistribute it and/or modify it under --
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12 -- terms of the GNU General Public License as published by the Free Soft- --
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13 -- ware Foundation; either version 3, or (at your option) any later ver- --
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14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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16 -- or FITNESS FOR A PARTICULAR PURPOSE. --
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17 -- --
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18 -- As a special exception under Section 7 of GPL version 3, you are granted --
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19 -- additional permissions described in the GCC Runtime Library Exception, --
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20 -- version 3.1, as published by the Free Software Foundation. --
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21 -- --
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22 -- You should have received a copy of the GNU General Public License and --
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23 -- a copy of the GCC Runtime Library Exception along with this program; --
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24 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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25 -- <http://www.gnu.org/licenses/>. --
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26 -- --
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27 -- GNAT was originally developed by the GNAT team at New York University. --
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28 -- Extensive contributions were provided by Ada Core Technologies Inc. --
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29 -- --
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30 ------------------------------------------------------------------------------
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31
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32 pragma Compiler_Unit_Warning;
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33
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34 package body System.WCh_Con is
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35
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36 ----------------------------
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37 -- Get_WC_Encoding_Method --
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38 ----------------------------
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39
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40 function Get_WC_Encoding_Method (C : Character) return WC_Encoding_Method is
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41 begin
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42 for Method in WC_Encoding_Method loop
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43 if C = WC_Encoding_Letters (Method) then
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44 return Method;
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45 end if;
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46 end loop;
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47
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48 raise Constraint_Error;
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49 end Get_WC_Encoding_Method;
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50
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51 function Get_WC_Encoding_Method (S : String) return WC_Encoding_Method is
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52 begin
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53 if S = "hex" then
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54 return WCEM_Hex;
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55 elsif S = "upper" then
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56 return WCEM_Upper;
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57 elsif S = "shift_jis" then
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58 return WCEM_Shift_JIS;
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59 elsif S = "euc" then
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60 return WCEM_EUC;
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61 elsif S = "utf8" then
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62 return WCEM_UTF8;
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63 elsif S = "brackets" then
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64 return WCEM_Brackets;
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65 else
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66 raise Constraint_Error;
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67 end if;
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68 end Get_WC_Encoding_Method;
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69
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70 --------------------------
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71 -- Is_Start_Of_Encoding --
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72 --------------------------
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73
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74 function Is_Start_Of_Encoding
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75 (C : Character;
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76 EM : WC_Encoding_Method) return Boolean
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77 is
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78 begin
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79 return (EM in WC_Upper_Half_Encoding_Method
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80 and then Character'Pos (C) >= 16#80#)
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81 or else (EM in WC_ESC_Encoding_Method and then C = ASCII.ESC);
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82 end Is_Start_Of_Encoding;
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83
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84 end System.WCh_Con;
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