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Diffstat (limited to 'gcc-4.4.0/gcc/ada/g-decstr.ads')
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diff --git a/gcc-4.4.0/gcc/ada/g-decstr.ads b/gcc-4.4.0/gcc/ada/g-decstr.ads deleted file mode 100755 index 07d501552..000000000 --- a/gcc-4.4.0/gcc/ada/g-decstr.ads +++ /dev/null @@ -1,163 +0,0 @@ ------------------------------------------------------------------------------- --- -- --- GNAT RUN-TIME COMPONENTS -- --- -- --- G N A T . D E C O D E _ S T R I N G -- --- -- --- S p e c -- --- -- --- Copyright (C) 2007, AdaCore -- --- -- --- 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 2, 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. See the GNU General Public License -- --- for more details. You should have received a copy of the GNU General -- --- Public License distributed with GNAT; see file COPYING. If not, write -- --- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, -- --- Boston, MA 02110-1301, USA. -- --- -- --- As a special exception, if other files instantiate generics from this -- --- unit, or you link this unit with other files to produce an executable, -- --- this unit does not by itself cause the resulting executable to be -- --- covered by the GNU General Public License. This exception does not -- --- however invalidate any other reasons why the executable file might be -- --- covered by the GNU Public License. -- --- -- --- GNAT was originally developed by the GNAT team at New York University. -- --- Extensive contributions were provided by Ada Core Technologies Inc. -- --- -- ------------------------------------------------------------------------------- - --- This generic package provides utility routines for converting from an --- encoded string to a corresponding Wide_String or Wide_Wide_String value --- using a specified encoding convention, which is supplied as the generic --- parameter. UTF-8 is handled especially efficiently, and if the encoding --- method is known at compile time to be WCEM_UTF8, then the instantiation --- is specialized to handle only the UTF-8 case and exclude code for the --- other encoding methods. The package also provides positioning routines --- for skipping encoded characters in either direction, and for validating --- strings for correct encodings. - --- Note: this package is only about decoding sequences of 8-bit characters --- into corresponding 16-bit Wide_String or 32-bit Wide_Wide_String values. --- It knows nothing at all about the character encodings being used for the --- resulting Wide_Character and Wide_Wide_Character values. Most often this --- will be Unicode/ISO-10646 as specified by the Ada RM, but this package --- does not make any assumptions about the character coding. See also the --- packages Ada.Wide_[Wide_]Characters.Unicode for unicode specific functions. - --- Note on the use of brackets encoding (WCEM_Brackets). The brackets encoding --- method is ambiguous in the context of this package, since there is no way --- to tell if ["1234"] is eight unencoded characters or one encoded character. --- In the context of Ada sources, any sequence starting [" must be the start --- of an encoding (since that sequence is not valid in Ada source otherwise). --- The routines in this package use the same approach. If the input string --- contains the sequence [" then this is assumed to be the start of a brackets --- encoding sequence, and if it does not match the syntax, an error is raised. --- In the case of the Prev functions, a sequence ending with "] is assumed to --- be a valid brackets sequence, and an error is raised if it is not. - -with System.WCh_Con; - -generic - Encoding_Method : System.WCh_Con.WC_Encoding_Method; - -package GNAT.Decode_String is - pragma Pure; - - function Decode_Wide_String (S : String) return Wide_String; - pragma Inline (Decode_Wide_String); - -- Decode the given String, which is encoded using the indicated coding - -- method, returning the corresponding decoded Wide_String value. If S - -- contains a character code that cannot be represented with the given - -- encoding, then Constraint_Error is raised. - - procedure Decode_Wide_String - (S : String; - Result : out Wide_String; - Length : out Natural); - -- Similar to the above function except that the result is stored in the - -- given Wide_String variable Result, starting at Result (Result'First). On - -- return, Length is set to the number of characters stored in Result. The - -- caller must ensure that Result is long enough (an easy choice is to set - -- the length equal to the S'Length, since decoding can never increase the - -- string length). If the length of Result is insufficient Constraint_Error - -- will be raised. - - function Decode_Wide_Wide_String (S : String) return Wide_Wide_String; - pragma Inline (Decode_Wide_Wide_String); - -- Same as above function but for Wide_Wide_String output - - procedure Decode_Wide_Wide_String - (S : String; - Result : out Wide_Wide_String; - Length : out Natural); - -- Same as above procedure, but for Wide_Wide_String output - - function Validate_Wide_String (S : String) return Boolean; - -- This function inspects the string S to determine if it contains only - -- valid encodings corresponding to Wide_Character values using the - -- given encoding. If a call to Decode_Wide_String (S) would return - -- without raising Constraint_Error, then Validate_Wide_String will - -- return True. If the call would have raised Constraint_Error, then - -- Validate_Wide_String will return False. - - function Validate_Wide_Wide_String (S : String) return Boolean; - -- Similar to Validate_Wide_String, except that it succeeds if the string - -- contains only encodings corresponding to Wide_Wide_Character values. - - procedure Decode_Wide_Character - (Input : String; - Ptr : in out Natural; - Result : out Wide_Character); - pragma Inline (Decode_Wide_Character); - -- This is a lower level procedure that decodes a single character using - -- the given encoding method. The encoded character is stored in Input, - -- starting at Input (Ptr). The resulting output character is stored in - -- Result, and on return Ptr is updated past the input character or - -- encoding sequence. Constraint_Error will be raised if the input has - -- has a character that cannot be represented using the given encoding, - -- or if Ptr is outside the bounds of the Input string. - - procedure Decode_Wide_Wide_Character - (Input : String; - Ptr : in out Natural; - Result : out Wide_Wide_Character); - -- Same as above procedure but with Wide_Wide_Character input - - procedure Next_Wide_Character (Input : String; Ptr : in out Natural); - -- This procedure examines the input string starting at Input (Ptr), and - -- advances Ptr past one character in the encoded string, so that on return - -- Ptr points to the next encoded character. Constraint_Error is raised if - -- an invalid encoding is encountered, or the end of the string is reached - -- or if Ptr is less than String'First on entry, or if the character - -- skipped is not a valid Wide_Character code. This call may be more - -- efficient than calling Decode_Wide_Character and discarding the result. - - procedure Prev_Wide_Character (Input : String; Ptr : in out Natural); - -- This procedure is similar to Next_Encoded_Character except that it moves - -- backwards in the string, so that on return, Ptr is set to point to the - -- previous encoded character. Constraint_Error is raised if the start of - -- the string is encountered. It is valid for Ptr to be one past the end - -- of the string for this call (in which case on return it will point to - -- the last encoded character). - -- - -- Note: it is not generally possible to do this function efficiently with - -- all encodings, the current implementation is only efficient for the case - -- of UTF-8 (Encoding_Method = WCEM_UTF8) and Brackets (Encoding_Method = - -- WCEM_Brackets). For all other encodings, we work by starting at the - -- beginning of the string and moving forward till Ptr is reached, which - -- is correct but slow. - - procedure Next_Wide_Wide_Character (Input : String; Ptr : in out Natural); - -- Similar to Next_Wide_Character except that codes skipped must be valid - -- Wide_Wide_Character codes. - - procedure Prev_Wide_Wide_Character (Input : String; Ptr : in out Natural); - -- Similar to Prev_Wide_Character except that codes skipped must be valid - -- Wide_Wide_Character codes. - -end GNAT.Decode_String; |