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diff --git a/gcc-4.2.1/gcc/ada/s-wchcon.ads b/gcc-4.2.1/gcc/ada/s-wchcon.ads deleted file mode 100644 index d0c9b8f30..000000000 --- a/gcc-4.2.1/gcc/ada/s-wchcon.ads +++ /dev/null @@ -1,189 +0,0 @@ ------------------------------------------------------------------------------- --- -- --- GNAT COMPILER COMPONENTS -- --- -- --- S Y S T E M . W C H _ C O N -- --- -- --- S p e c -- --- -- --- Copyright (C) 1992-2005, 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 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 package defines the codes used to identify the encoding method for --- wide characters in string and character constants. This is needed both --- at compile time and at runtime (for the wide character runtime routines) - --- This unit may be used directly from an application program by providing --- an appropriate WITH, and the interface can be expected to remain stable. - -package System.WCh_Con is - pragma Pure; - - ------------------------------------- - -- Wide_Character Encoding Methods -- - ------------------------------------- - - -- A wide character encoding method is a method for uniquely representing - -- a Wide_Character or Wide_Wide_Character value using a one or more - -- Character values. Three types of encoding method are supported by GNAT: - - -- An escape encoding method uses ESC as the first character of the - -- sequence, and subsequent characters determine the wide character - -- value that is represented. Any character other than ESC stands - -- for itself as a single byte (i.e. any character in Latin-1, other - -- than ESC itself, is represented as a single character: itself). - - -- An upper half encoding method uses a character in the upper half - -- range (i.e. in the range 16#80# .. 16#FF#) as the first byte of - -- a wide character encoding sequence. Subsequent characters are - -- used to determine the wide character value that is represented. - -- Any character in the lower half (16#00# .. 16#7F#) represents - -- itself as a single character. - - -- The brackets notation, where a wide character is represented by the - -- sequence ["xx"] or ["xxxx"] or ["xxxxxx"] where xx are hexadecimal - -- characters. Note that currently this is the only encoding that - -- supports the full UTF-32 range. - - -- Note that GNAT does not currently support escape-in, escape-out - -- encoding methods, where an escape sequence is used to set a mode - -- used to recognize subsequent characters. All encoding methods use - -- individual character-by-character encodings, so that a sequence of - -- wide characters is represented by a sequence of encodings. - - -- To add new encoding methods, the following steps are required: - - -- 1. Define a code for a new value of type WC_Encoding_Method - -- 2. Adjust the definition of WC_Encoding_Method accordingly - -- 3. Provide appropriate conversion routines in System.Wch_Cnv - -- 4. Adjust definition of WC_Longest_Sequence if necessary - -- 5. Add an entry in WC_Encoding_Letters for the new method - -- 6. Add proper code to s-wchstw.adb, s-wchwts.adb, s-widwch.adb - - -- Note that the WC_Encoding_Method values must be kept ordered so that - -- the definitions of the subtypes WC_Upper_Half_Encoding_Method and - -- WC_ESC_Encoding_Method are still correct. - - --------------------------------- - -- Encoding Method Definitions -- - --------------------------------- - - type WC_Encoding_Method is range 1 .. 6; - -- Type covering the range of values used to represent wide character - -- encoding methods. An enumeration type might be a little neater, but - -- more trouble than it's worth, given the need to pass these values - -- from the compiler to the backend, and to record them in the ALI file. - - WCEM_Hex : constant WC_Encoding_Method := 1; - -- The wide character with code 16#abcd# is represented by the escape - -- sequence ESC a b c d (five characters, where abcd are ASCII hex - -- characters, using upper case for letters). This method is easy - -- to deal with in external environments that do not support wide - -- characters, and covers the whole BMP. This is the default encoding - -- method. - - WCEM_Upper : constant WC_Encoding_Method := 2; - -- The wide character with encoding 16#abcd#, where the upper bit is on - -- (i.e. a is in the range 8-F) is represented as two bytes 16#ab# and - -- 16#cd#. The second byte may never be a format control character, but - -- is not required to be in the upper half. This method can be also used - -- for shift-JIS or EUC where the internal coding matches the external - -- coding. - - WCEM_Shift_JIS : constant WC_Encoding_Method := 3; - -- A wide character is represented by a two character sequence 16#ab# - -- and 16#cd#, with the restrictions described for upper half encoding - -- as described above. The internal character code is the corresponding - -- JIS character according to the standard algorithm for Shift-JIS - -- conversion. See the body of package System.JIS_Conversions for - -- further details. - - WCEM_EUC : constant WC_Encoding_Method := 4; - -- A wide character is represented by a two character sequence 16#ab# and - -- 16#cd#, with both characters being in the upper half set. The internal - -- character code is the corresponding JIS character according to the EUC - -- encoding algorithm. See the body of package System.JIS_Conversions for - -- further details. - - WCEM_UTF8 : constant WC_Encoding_Method := 5; - -- An ISO 10646-1 BMP/Unicode wide character is represented in - -- UCS Transformation Format 8 (UTF-8) as defined in Annex R of ISO - -- 10646-1/Am.2. Depending on the character value, a Unicode character - -- is represented as the one to six byte sequence. - -- - -- 16#0000_0000#-16#0000_007f#: 2#0xxxxxxx# - -- 16#0000_0080#-16#0000_07ff#: 2#110xxxxx# 2#10xxxxxx# - -- 16#0000_0800#-16#0000_ffff#: 2#1110xxxx# 2#10xxxxxx# 2#10xxxxxx# - -- 16#0001_0000#-16#001F_FFFF#: 2#11110xxx# 2#10xxxxxx# 2#10xxxxxx# - -- 2#10xxxxxx# - -- 16#0020_0000#-16#03FF_FFFF#: 2#111110xx# 2#10xxxxxx# 2#10xxxxxx# - -- 2#10xxxxxx# 2#10xxxxxx# - -- 16#0400_0000#-16#7FFF_FFFF#: 2#1111110x# 2#10xxxxxx# 2#10xxxxxx# - -- 2#10xxxxxx# 2#10xxxxxx# 2#10xxxxxx# - -- - -- where the xxx bits correspond to the left-padded bits of the - -- 16-bit character value. Note that all lower half ASCII characters - -- are represented as ASCII bytes and all upper half characters and - -- other wide characters are represented as sequences of upper-half. - - WCEM_Brackets : constant WC_Encoding_Method := 6; - -- A wide character is represented using one of the following sequences: - -- - -- ["xx"] - -- ["xxxx"] - -- ["xxxxxx"] - -- ["xxxxxxxx"] - -- - -- where xx are hexadecimal digits representing the character code. - - WC_Encoding_Letters : constant array (WC_Encoding_Method) of Character := - (WCEM_Hex => 'h', - WCEM_Upper => 'u', - WCEM_Shift_JIS => 's', - WCEM_EUC => 'e', - WCEM_UTF8 => '8', - WCEM_Brackets => 'b'); - -- Letters used for selection of wide character encoding method in the - -- compiler options (-gnatW? switch) and for Wide_Text_IO (WCEM parameter - -- in the form string). - - subtype WC_ESC_Encoding_Method is - WC_Encoding_Method range WCEM_Hex .. WCEM_Hex; - -- Encoding methods using an ESC character at the start of the sequence - - subtype WC_Upper_Half_Encoding_Method is - WC_Encoding_Method range WCEM_Upper .. WCEM_UTF8; - -- Encoding methods using an upper half character (16#80#..16#FF) at - -- the start of the sequence. - - WC_Longest_Sequence : constant := 10; - -- The longest number of characters that can be used for a wide character - -- or wide wide character sequence for any of the active encoding methods. - - function Get_WC_Encoding_Method (C : Character) return WC_Encoding_Method; - -- Given a character C, returns corresponding encoding method (see array - -- WC_Encoding_Letters above). Raises Constraint_Error if not in list. - -end System.WCh_Con; |