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author | Jing Yu <jingyu@google.com> | 2009-11-05 15:11:04 -0800 |
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committer | Jing Yu <jingyu@google.com> | 2009-11-05 15:11:04 -0800 |
commit | df62c1c110e8532b995b23540b7e3695729c0779 (patch) | |
tree | dbbd4cbdb50ac38011e058a2533ee4c3168b0205 /gcc-4.2.1/gcc/ada/a-strsea.adb | |
parent | 8d401cf711539af5a2f78d12447341d774892618 (diff) | |
download | toolchain_gcc-df62c1c110e8532b995b23540b7e3695729c0779.tar.gz toolchain_gcc-df62c1c110e8532b995b23540b7e3695729c0779.tar.bz2 toolchain_gcc-df62c1c110e8532b995b23540b7e3695729c0779.zip |
Check in gcc sources for prebuilt toolchains in Eclair.
Diffstat (limited to 'gcc-4.2.1/gcc/ada/a-strsea.adb')
-rw-r--r-- | gcc-4.2.1/gcc/ada/a-strsea.adb | 479 |
1 files changed, 479 insertions, 0 deletions
diff --git a/gcc-4.2.1/gcc/ada/a-strsea.adb b/gcc-4.2.1/gcc/ada/a-strsea.adb new file mode 100644 index 000000000..322aeaa7f --- /dev/null +++ b/gcc-4.2.1/gcc/ada/a-strsea.adb @@ -0,0 +1,479 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT RUN-TIME COMPONENTS -- +-- -- +-- A D A . S T R I N G S . S E A R C H -- +-- -- +-- B o d y -- +-- -- +-- 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. -- +-- -- +------------------------------------------------------------------------------ + +-- Note: This code is derived from the ADAR.CSH public domain Ada 83 +-- versions of the Appendix C string handling packages (code extracted +-- from Ada.Strings.Fixed). A significant change is that we optimize the +-- case of identity mappings for Count and Index, and also Index_Non_Blank +-- is specialized (rather than using the general Index routine). + +with Ada.Strings.Maps; use Ada.Strings.Maps; + +package body Ada.Strings.Search is + + ----------------------- + -- Local Subprograms -- + ----------------------- + + function Belongs + (Element : Character; + Set : Maps.Character_Set; + Test : Membership) return Boolean; + pragma Inline (Belongs); + -- Determines if the given element is in (Test = Inside) or not in + -- (Test = Outside) the given character set. + + ------------- + -- Belongs -- + ------------- + + function Belongs + (Element : Character; + Set : Maps.Character_Set; + Test : Membership) return Boolean + is + begin + if Test = Inside then + return Is_In (Element, Set); + else + return not Is_In (Element, Set); + end if; + end Belongs; + + ----------- + -- Count -- + ----------- + + function Count + (Source : String; + Pattern : String; + Mapping : Maps.Character_Mapping := Maps.Identity) return Natural + is + N : Natural; + J : Natural; + + Mapped_Source : String (Source'Range); + + begin + for J in Source'Range loop + Mapped_Source (J) := Value (Mapping, Source (J)); + end loop; + + if Pattern = "" then + raise Pattern_Error; + end if; + + N := 0; + J := Source'First; + + while J <= Source'Last - (Pattern'Length - 1) loop + if Mapped_Source (J .. J + (Pattern'Length - 1)) = Pattern then + N := N + 1; + J := J + Pattern'Length; + else + J := J + 1; + end if; + end loop; + + return N; + end Count; + + function Count + (Source : String; + Pattern : String; + Mapping : Maps.Character_Mapping_Function) return Natural + is + Mapped_Source : String (Source'Range); + N : Natural; + J : Natural; + + begin + if Pattern = "" then + raise Pattern_Error; + end if; + + -- We make sure Access_Check is unsuppressed so that the Mapping.all + -- call will generate a friendly Constraint_Error if the value for + -- Mapping is uninitialized (and hence null). + + declare + pragma Unsuppress (Access_Check); + + begin + for J in Source'Range loop + Mapped_Source (J) := Mapping.all (Source (J)); + end loop; + end; + + N := 0; + J := Source'First; + + while J <= Source'Last - (Pattern'Length - 1) loop + if Mapped_Source (J .. J + (Pattern'Length - 1)) = Pattern then + N := N + 1; + J := J + Pattern'Length; + else + J := J + 1; + end if; + end loop; + + return N; + end Count; + + function Count + (Source : String; + Set : Maps.Character_Set) return Natural + is + N : Natural := 0; + + begin + for J in Source'Range loop + if Is_In (Source (J), Set) then + N := N + 1; + end if; + end loop; + + return N; + end Count; + + ---------------- + -- Find_Token -- + ---------------- + + procedure Find_Token + (Source : String; + Set : Maps.Character_Set; + Test : Membership; + First : out Positive; + Last : out Natural) + is + begin + for J in Source'Range loop + if Belongs (Source (J), Set, Test) then + First := J; + + for K in J + 1 .. Source'Last loop + if not Belongs (Source (K), Set, Test) then + Last := K - 1; + return; + end if; + end loop; + + -- Here if J indexes 1st char of token, and all chars + -- after J are in the token + + Last := Source'Last; + return; + end if; + end loop; + + -- Here if no token found + + First := Source'First; + Last := 0; + end Find_Token; + + ----------- + -- Index -- + ----------- + + function Index + (Source : String; + Pattern : String; + Going : Direction := Forward; + Mapping : Maps.Character_Mapping := Maps.Identity) return Natural + is + Cur_Index : Natural; + Mapped_Source : String (Source'Range); + + begin + if Pattern = "" then + raise Pattern_Error; + end if; + + for J in Source'Range loop + Mapped_Source (J) := Value (Mapping, Source (J)); + end loop; + + -- Forwards case + + if Going = Forward then + for J in 1 .. Source'Length - Pattern'Length + 1 loop + Cur_Index := Source'First + J - 1; + + if Pattern = Mapped_Source + (Cur_Index .. Cur_Index + Pattern'Length - 1) + then + return Cur_Index; + end if; + end loop; + + -- Backwards case + + else + for J in reverse 1 .. Source'Length - Pattern'Length + 1 loop + Cur_Index := Source'First + J - 1; + + if Pattern = Mapped_Source + (Cur_Index .. Cur_Index + Pattern'Length - 1) + then + return Cur_Index; + end if; + end loop; + end if; + + -- Fall through if no match found. Note that the loops are skipped + -- completely in the case of the pattern being longer than the source. + + return 0; + end Index; + + function Index + (Source : String; + Pattern : String; + Going : Direction := Forward; + Mapping : Maps.Character_Mapping_Function) return Natural + is + Mapped_Source : String (Source'Range); + Cur_Index : Natural; + + begin + if Pattern = "" then + raise Pattern_Error; + end if; + + -- We make sure Access_Check is unsuppressed so that the Mapping.all + -- call will generate a friendly Constraint_Error if the value for + -- Mapping is uninitialized (and hence null). + + declare + pragma Unsuppress (Access_Check); + begin + for J in Source'Range loop + Mapped_Source (J) := Mapping.all (Source (J)); + end loop; + end; + + -- Forwards case + + if Going = Forward then + for J in 1 .. Source'Length - Pattern'Length + 1 loop + Cur_Index := Source'First + J - 1; + + if Pattern = Mapped_Source + (Cur_Index .. Cur_Index + Pattern'Length - 1) + then + return Cur_Index; + end if; + end loop; + + -- Backwards case + + else + for J in reverse 1 .. Source'Length - Pattern'Length + 1 loop + Cur_Index := Source'First + J - 1; + + if Pattern = Mapped_Source + (Cur_Index .. Cur_Index + Pattern'Length - 1) + then + return Cur_Index; + end if; + end loop; + end if; + + return 0; + end Index; + + function Index + (Source : String; + Set : Maps.Character_Set; + Test : Membership := Inside; + Going : Direction := Forward) return Natural + is + begin + -- Forwards case + + if Going = Forward then + for J in Source'Range loop + if Belongs (Source (J), Set, Test) then + return J; + end if; + end loop; + + -- Backwards case + + else + for J in reverse Source'Range loop + if Belongs (Source (J), Set, Test) then + return J; + end if; + end loop; + end if; + + -- Fall through if no match + + return 0; + end Index; + + function Index + (Source : String; + Pattern : String; + From : Positive; + Going : Direction := Forward; + Mapping : Maps.Character_Mapping := Maps.Identity) return Natural + is + begin + if Going = Forward then + if From < Source'First then + raise Index_Error; + end if; + + return + Index (Source (From .. Source'Last), Pattern, Forward, Mapping); + + else + if From > Source'Last then + raise Index_Error; + end if; + + return + Index (Source (Source'First .. From), Pattern, Backward, Mapping); + end if; + end Index; + + function Index + (Source : String; + Pattern : String; + From : Positive; + Going : Direction := Forward; + Mapping : Maps.Character_Mapping_Function) return Natural + is + begin + if Going = Forward then + if From < Source'First then + raise Index_Error; + end if; + + return Index + (Source (From .. Source'Last), Pattern, Forward, Mapping); + + else + if From > Source'Last then + raise Index_Error; + end if; + + return Index + (Source (Source'First .. From), Pattern, Backward, Mapping); + end if; + end Index; + + function Index + (Source : String; + Set : Maps.Character_Set; + From : Positive; + Test : Membership := Inside; + Going : Direction := Forward) return Natural + is + begin + if Going = Forward then + if From < Source'First then + raise Index_Error; + end if; + + return + Index (Source (From .. Source'Last), Set, Test, Forward); + + else + if From > Source'Last then + raise Index_Error; + end if; + + return + Index (Source (Source'First .. From), Set, Test, Backward); + end if; + end Index; + + --------------------- + -- Index_Non_Blank -- + --------------------- + + function Index_Non_Blank + (Source : String; + Going : Direction := Forward) return Natural + is + begin + if Going = Forward then + for J in Source'Range loop + if Source (J) /= ' ' then + return J; + end if; + end loop; + + else -- Going = Backward + for J in reverse Source'Range loop + if Source (J) /= ' ' then + return J; + end if; + end loop; + end if; + + -- Fall through if no match + + return 0; + end Index_Non_Blank; + + function Index_Non_Blank + (Source : String; + From : Positive; + Going : Direction := Forward) return Natural + is + begin + if Going = Forward then + if From < Source'First then + raise Index_Error; + end if; + + return + Index_Non_Blank (Source (From .. Source'Last), Forward); + + else + if From > Source'Last then + raise Index_Error; + end if; + + return + Index_Non_Blank (Source (Source'First .. From), Backward); + end if; + end Index_Non_Blank; + +end Ada.Strings.Search; |