dfbe160a82
2005-09-01 Ed Schonberg <schonberg@adacore.com> Thomas Quinot <quinot@adacore.com> * fname-sf.adb, mlib-tgt.ads, back_end.adb, casing.adb, g-debpoo.adb, g-excact.adb, g-spipat.adb, g-spipat.ads, g-thread.adb, lib-list.adb, makeutl.adb, mlib.adb, osint.adb, par-ch10.adb, par-load.adb, prep.adb, prj.adb, prj-attr.ads, prj-env.ads, prj-err.adb, prj-err.ads, prj-ext.adb, prj-ext.ads, prj-makr.adb, prj-makr.ads, prj-pars.ads, prj-part.adb, prj-strt.adb, prj-tree.ads, prj-util.ads, sem_dist.adb, sinput-c.ads, sinput-l.ads, sinput-p.ads, styleg-c.ads, xr_tabls.adb, prj-attr-pm.ads, makegpr.adb: Remove redundant use_clauses. From-SVN: r103854
203 lines
7.2 KiB
Ada
203 lines
7.2 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNAT COMPILER COMPONENTS --
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-- --
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-- C A S I N G --
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-- --
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-- B o d y --
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-- --
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-- Copyright (C) 1992-2005 Free Software Foundation, Inc. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 2, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
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-- for more details. You should have received a copy of the GNU General --
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-- Public License distributed with GNAT; see file COPYING. If not, write --
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-- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
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-- Boston, MA 02110-1301, USA. --
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-- --
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-- As a special exception, if other files instantiate generics from this --
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-- unit, or you link this unit with other files to produce an executable, --
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-- this unit does not by itself cause the resulting executable to be --
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-- covered by the GNU General Public License. This exception does not --
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-- however invalidate any other reasons why the executable file might be --
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-- covered by the GNU Public License. --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc. --
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-- --
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------------------------------------------------------------------------------
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with Csets; use Csets;
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with Namet; use Namet;
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with Opt; use Opt;
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with Widechar; use Widechar;
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package body Casing is
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----------------------
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-- Determine_Casing --
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----------------------
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function Determine_Casing (Ident : Text_Buffer) return Casing_Type is
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All_Lower : Boolean := True;
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-- Set False if upper case letter found
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All_Upper : Boolean := True;
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-- Set False if lower case letter found
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Mixed : Boolean := True;
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-- Set False if exception to mixed case rule found (lower case letter
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-- at start or after underline, or upper case letter elsewhere).
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Decisive : Boolean := False;
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-- Set True if at least one instance of letter not after underline
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After_Und : Boolean := True;
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-- True at start of string, and after an underline character
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begin
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for S in Ident'Range loop
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if Ident (S) = '_' or else Ident (S) = '.' then
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After_Und := True;
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elsif Is_Lower_Case_Letter (Ident (S)) then
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All_Upper := False;
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if not After_Und then
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Decisive := True;
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else
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After_Und := False;
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Mixed := False;
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end if;
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elsif Is_Upper_Case_Letter (Ident (S)) then
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All_Lower := False;
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if not After_Und then
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Decisive := True;
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Mixed := False;
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else
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After_Und := False;
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end if;
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end if;
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end loop;
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-- Now we can figure out the result from the flags we set in that loop
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if All_Lower then
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return All_Lower_Case;
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elsif not Decisive then
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return Unknown;
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elsif All_Upper then
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return All_Upper_Case;
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elsif Mixed then
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return Mixed_Case;
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else
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return Unknown;
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end if;
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end Determine_Casing;
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------------------------
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-- Set_All_Upper_Case --
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------------------------
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procedure Set_All_Upper_Case is
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begin
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Set_Casing (All_Upper_Case);
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end Set_All_Upper_Case;
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----------------
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-- Set_Casing --
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----------------
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procedure Set_Casing (C : Casing_Type; D : Casing_Type := Mixed_Case) is
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Ptr : Natural;
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Actual_Casing : Casing_Type;
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-- Set from C or D as appropriate
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After_Und : Boolean := True;
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-- True at start of string, and after an underline character or after
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-- any other special character that is not a normal identifier char).
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begin
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if C /= Unknown then
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Actual_Casing := C;
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else
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Actual_Casing := D;
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end if;
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Ptr := 1;
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while Ptr <= Name_Len loop
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-- Wide character. Note that we do nothing with casing in this case.
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-- In Ada 2005 mode, required folding of lower case letters happened
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-- as the identifier was scanned, and we do not attempt any further
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-- messing with case (note that in any case we do not know how to
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-- fold upper case to lower case in wide character mode). We also
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-- do not bother with recognizing punctuation as equivalent to an
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-- underscore. There is nothing functional at this stage in doing
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-- the requested casing operation, beyond folding to upper case
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-- when it is mandatory, which does not involve underscores.
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if Name_Buffer (Ptr) = ASCII.ESC
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or else Name_Buffer (Ptr) = '['
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or else (Upper_Half_Encoding
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and then Name_Buffer (Ptr) in Upper_Half_Character)
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then
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Skip_Wide (Name_Buffer, Ptr);
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After_Und := False;
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-- Underscore, or non-identifer character (error case)
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elsif Name_Buffer (Ptr) = '_'
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or else not Identifier_Char (Name_Buffer (Ptr))
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then
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After_Und := True;
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Ptr := Ptr + 1;
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-- Lower case letter
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elsif Is_Lower_Case_Letter (Name_Buffer (Ptr)) then
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if Actual_Casing = All_Upper_Case
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or else (After_Und and then Actual_Casing = Mixed_Case)
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then
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Name_Buffer (Ptr) := Fold_Upper (Name_Buffer (Ptr));
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end if;
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After_Und := False;
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Ptr := Ptr + 1;
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-- Upper case letter
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elsif Is_Upper_Case_Letter (Name_Buffer (Ptr)) then
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if Actual_Casing = All_Lower_Case
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or else (not After_Und and then Actual_Casing = Mixed_Case)
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then
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Name_Buffer (Ptr) := Fold_Lower (Name_Buffer (Ptr));
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end if;
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After_Und := False;
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Ptr := Ptr + 1;
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-- Other identifier character (must be digit)
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else
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After_Und := False;
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Ptr := Ptr + 1;
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end if;
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end loop;
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end Set_Casing;
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end Casing;
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