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1 ------------------------------------------------------------------------------
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2 -- --
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3 -- GNAT RUN-TIME COMPONENTS --
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4 -- --
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5 -- S Y S T E M . W C H _ S T W --
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6 -- --
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7 -- S p e c --
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8 -- --
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9 -- Copyright (C) 1992-2018, Free Software Foundation, Inc. --
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111
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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 -- This package contains the routine used to convert strings to wide (wide)
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33 -- strings for use by wide (wide) image attribute.
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34
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35 with System.WCh_Con;
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36
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37 package System.WCh_StW is
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38 pragma Pure;
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39
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40 procedure String_To_Wide_String
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41 (S : String;
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42 R : out Wide_String;
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43 L : out Natural;
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44 EM : System.WCh_Con.WC_Encoding_Method);
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45 -- This routine simply takes its argument and converts it to wide string
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46 -- format, storing the result in R (1 .. L), with L being set appropriately
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47 -- on return. The caller guarantees that R is long enough to accommodate
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48 -- the result. This is used in the context of the Wide_Image attribute,
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49 -- where the argument is the corresponding 'Image attribute. Any wide
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50 -- character escape sequences in the string are converted to the
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51 -- corresponding wide character value. No syntax checks are made, it is
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52 -- assumed that any such sequences are validly formed (this must be assured
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53 -- by the caller), and results from the fact that Wide_Image is only used
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54 -- on strings that have been built by the compiler, such as images of
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55 -- enumeration literals. If the method for encoding is a shift-in,
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56 -- shift-out convention, then it is assumed that normal (non-wide
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57 -- character) mode holds at the start and end of the argument string. EM
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58 -- indicates the wide character encoding method.
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59 -- Note: in the WCEM_Brackets case, the brackets escape sequence is used
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60 -- only for codes greater than 16#FF#.
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61
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62 procedure String_To_Wide_Wide_String
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63 (S : String;
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64 R : out Wide_Wide_String;
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65 L : out Natural;
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66 EM : System.WCh_Con.WC_Encoding_Method);
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67 -- Same function with Wide_Wide_String output
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68
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69 end System.WCh_StW;
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