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Diffstat (limited to 'gcc-4.2.1/gcc/ada/switch.ads')
| -rw-r--r-- | gcc-4.2.1/gcc/ada/switch.ads | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/gcc-4.2.1/gcc/ada/switch.ads b/gcc-4.2.1/gcc/ada/switch.ads new file mode 100644 index 000000000..dce2f12d8 --- /dev/null +++ b/gcc-4.2.1/gcc/ada/switch.ads @@ -0,0 +1,92 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT COMPILER COMPONENTS -- +-- -- +-- S W I T C H -- +-- -- +-- 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. -- +-- -- +-- GNAT was originally developed by the GNAT team at New York University. -- +-- Extensive contributions were provided by Ada Core Technologies Inc. -- +-- -- +------------------------------------------------------------------------------ + +-- This package together with a child package appropriate to the client +-- tool scans switches. Note that the body of the appropraite Usage package +-- must be coordinated with the switches that are recognized by this package. +-- These Usage packages also act as the official documentation for the +-- switches that are recognized. In addition, package Debug documents +-- the otherwise undocumented debug switches that are also recognized. + +with Types; use Types; + +package Switch is + + -- Note: The default switch character is indicated by Switch_Character, + -- but regardless of what it is, a hyphen is always allowed as an + -- (alternative) switch character. + + -- Note: In GNAT, the case of switches is not significant if + -- Switches_Case_Sensitive is False. If this is the case, switch + -- characters, or letters appearing in the parameter to a switch, may be + -- either upper case or lower case. + + ----------------- + -- Subprograms -- + ----------------- + + function Is_Switch (Switch_Chars : String) return Boolean; + -- Returns True iff Switch_Chars is at least two characters long, + -- and the first character indicates it is a switch. + + function Is_Front_End_Switch (Switch_Chars : String) return Boolean; + -- Returns True iff Switch_Chars represents a front-end switch, + -- ie. it starts with -I or -gnat. + +private + + -- This section contains some common routines used by the tool dependent + -- child packages (there is one such child package for each tool that + -- uses Switches to scan switches - Compiler/gnatbind/gnatmake/. + + Switch_Max_Value : constant := 999_999; + -- Maximum value permitted in switches that take a value + + procedure Scan_Nat + (Switch_Chars : String; + Max : Integer; + Ptr : in out Integer; + Result : out Nat; + Switch : Character); + -- Scan natural integer parameter for switch. On entry, Ptr points + -- just past the switch character, on exit it points past the last + -- digit of the integer value. + + procedure Scan_Pos + (Switch_Chars : String; + Max : Integer; + Ptr : in out Integer; + Result : out Pos; + Switch : Character); + -- Scan positive integer parameter for switch. On entry, Ptr points + -- just past the switch character, on exit it points past the last + -- digit of the integer value. + + procedure Bad_Switch (Switch : Character); + procedure Bad_Switch (Switch : String); + -- Fail with an appropriate message when a switch is not recognized + +end Switch; |