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Diffstat (limited to 'gcc/ada/a-stzsea.adb')
| -rw-r--r-- | gcc/ada/a-stzsea.adb | 610 |
1 files changed, 610 insertions, 0 deletions
diff --git a/gcc/ada/a-stzsea.adb b/gcc/ada/a-stzsea.adb new file mode 100644 index 000000000..e745091f6 --- /dev/null +++ b/gcc/ada/a-stzsea.adb @@ -0,0 +1,610 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT RUN-TIME COMPONENTS -- +-- -- +-- A D A . S T R I N G S . W I D E _ W I D E _ S E A R C H -- +-- -- +-- B o d y -- +-- -- +-- Copyright (C) 1992-2010, 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 3, 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. -- +-- -- +-- As a special exception under Section 7 of GPL version 3, you are granted -- +-- additional permissions described in the GCC Runtime Library Exception, -- +-- version 3.1, as published by the Free Software Foundation. -- +-- -- +-- You should have received a copy of the GNU General Public License and -- +-- a copy of the GCC Runtime Library Exception along with this program; -- +-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- +-- <http://www.gnu.org/licenses/>. -- +-- -- +-- GNAT was originally developed by the GNAT team at New York University. -- +-- Extensive contributions were provided by Ada Core Technologies Inc. -- +-- -- +------------------------------------------------------------------------------ + +with Ada.Strings.Wide_Wide_Maps; use Ada.Strings.Wide_Wide_Maps; +with System; use System; + +package body Ada.Strings.Wide_Wide_Search is + + ----------------------- + -- Local Subprograms -- + ----------------------- + + function Belongs + (Element : Wide_Wide_Character; + Set : Wide_Wide_Maps.Wide_Wide_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 : Wide_Wide_Character; + Set : Wide_Wide_Maps.Wide_Wide_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 : Wide_Wide_String; + Pattern : Wide_Wide_String; + Mapping : Wide_Wide_Maps.Wide_Wide_Character_Mapping := + Wide_Wide_Maps.Identity) + return Natural + is + PL1 : constant Integer := Pattern'Length - 1; + Num : Natural; + Ind : Natural; + Cur : Natural; + + begin + if Pattern = "" then + raise Pattern_Error; + end if; + + Num := 0; + Ind := Source'First; + + -- Unmapped case + + if Mapping'Address = Wide_Wide_Maps.Identity'Address then + while Ind <= Source'Last - PL1 loop + if Pattern = Source (Ind .. Ind + PL1) then + Num := Num + 1; + Ind := Ind + Pattern'Length; + else + Ind := Ind + 1; + end if; + end loop; + + -- Mapped case + + else + while Ind <= Source'Last - PL1 loop + Cur := Ind; + for K in Pattern'Range loop + if Pattern (K) /= Value (Mapping, Source (Cur)) then + Ind := Ind + 1; + goto Cont; + else + Cur := Cur + 1; + end if; + end loop; + + Num := Num + 1; + Ind := Ind + Pattern'Length; + + <<Cont>> + null; + end loop; + end if; + + -- Return result + + return Num; + end Count; + + function Count + (Source : Wide_Wide_String; + Pattern : Wide_Wide_String; + Mapping : Wide_Wide_Maps.Wide_Wide_Character_Mapping_Function) + return Natural + is + PL1 : constant Integer := Pattern'Length - 1; + Num : Natural; + Ind : Natural; + Cur : Natural; + + begin + if Pattern = "" then + raise Pattern_Error; + end if; + + -- Check for null pointer in case checks are off + + if Mapping = null then + raise Constraint_Error; + end if; + + Num := 0; + Ind := Source'First; + while Ind <= Source'Last - PL1 loop + Cur := Ind; + for K in Pattern'Range loop + if Pattern (K) /= Mapping (Source (Cur)) then + Ind := Ind + 1; + goto Cont; + else + Cur := Cur + 1; + end if; + end loop; + + Num := Num + 1; + Ind := Ind + Pattern'Length; + + <<Cont>> + null; + end loop; + + return Num; + end Count; + + function Count + (Source : Wide_Wide_String; + Set : Wide_Wide_Maps.Wide_Wide_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 : Wide_Wide_String; + Set : Wide_Wide_Maps.Wide_Wide_Character_Set; + From : Positive; + Test : Membership; + First : out Positive; + Last : out Natural) + is + begin + for J in From .. Source'Last 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 first 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 := From; + Last := 0; + end Find_Token; + + procedure Find_Token + (Source : Wide_Wide_String; + Set : Wide_Wide_Maps.Wide_Wide_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 first 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 : Wide_Wide_String; + Pattern : Wide_Wide_String; + Going : Direction := Forward; + Mapping : Wide_Wide_Maps.Wide_Wide_Character_Mapping := + Wide_Wide_Maps.Identity) + return Natural + is + PL1 : constant Integer := Pattern'Length - 1; + Cur : Natural; + + Ind : Integer; + -- Index for start of match check. This can be negative if the pattern + -- length is greater than the string length, which is why this variable + -- is Integer instead of Natural. In this case, the search loops do not + -- execute at all, so this Ind value is never used. + + begin + if Pattern = "" then + raise Pattern_Error; + end if; + + -- Forwards case + + if Going = Forward then + Ind := Source'First; + + -- Unmapped forward case + + if Mapping'Address = Wide_Wide_Maps.Identity'Address then + for J in 1 .. Source'Length - PL1 loop + if Pattern = Source (Ind .. Ind + PL1) then + return Ind; + else + Ind := Ind + 1; + end if; + end loop; + + -- Mapped forward case + + else + for J in 1 .. Source'Length - PL1 loop + Cur := Ind; + + for K in Pattern'Range loop + if Pattern (K) /= Value (Mapping, Source (Cur)) then + goto Cont1; + else + Cur := Cur + 1; + end if; + end loop; + + return Ind; + + <<Cont1>> + Ind := Ind + 1; + end loop; + end if; + + -- Backwards case + + else + -- Unmapped backward case + + Ind := Source'Last - PL1; + + if Mapping'Address = Wide_Wide_Maps.Identity'Address then + for J in reverse 1 .. Source'Length - PL1 loop + if Pattern = Source (Ind .. Ind + PL1) then + return Ind; + else + Ind := Ind - 1; + end if; + end loop; + + -- Mapped backward case + + else + for J in reverse 1 .. Source'Length - PL1 loop + Cur := Ind; + + for K in Pattern'Range loop + if Pattern (K) /= Value (Mapping, Source (Cur)) then + goto Cont2; + else + Cur := Cur + 1; + end if; + end loop; + + return Ind; + + <<Cont2>> + Ind := Ind - 1; + end loop; + end if; + 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 : Wide_Wide_String; + Pattern : Wide_Wide_String; + Going : Direction := Forward; + Mapping : Wide_Wide_Maps.Wide_Wide_Character_Mapping_Function) + return Natural + is + PL1 : constant Integer := Pattern'Length - 1; + Ind : Natural; + Cur : Natural; + + begin + if Pattern = "" then + raise Pattern_Error; + end if; + + -- Check for null pointer in case checks are off + + if Mapping = null then + raise Constraint_Error; + end if; + + -- If Pattern longer than Source it can't be found + + if Pattern'Length > Source'Length then + return 0; + end if; + + -- Forwards case + + if Going = Forward then + Ind := Source'First; + for J in 1 .. Source'Length - PL1 loop + Cur := Ind; + + for K in Pattern'Range loop + if Pattern (K) /= Mapping.all (Source (Cur)) then + goto Cont1; + else + Cur := Cur + 1; + end if; + end loop; + + return Ind; + + <<Cont1>> + Ind := Ind + 1; + end loop; + + -- Backwards case + + else + Ind := Source'Last - PL1; + for J in reverse 1 .. Source'Length - PL1 loop + Cur := Ind; + + for K in Pattern'Range loop + if Pattern (K) /= Mapping.all (Source (Cur)) then + goto Cont2; + else + Cur := Cur + 1; + end if; + end loop; + + return Ind; + + <<Cont2>> + Ind := Ind - 1; + 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 : Wide_Wide_String; + Set : Wide_Wide_Maps.Wide_Wide_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 : Wide_Wide_String; + Pattern : Wide_Wide_String; + From : Positive; + Going : Direction := Forward; + Mapping : Wide_Wide_Maps.Wide_Wide_Character_Mapping := + Wide_Wide_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 : Wide_Wide_String; + Pattern : Wide_Wide_String; + From : Positive; + Going : Direction := Forward; + Mapping : Wide_Wide_Maps.Wide_Wide_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 : Wide_Wide_String; + Set : Wide_Wide_Maps.Wide_Wide_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 : Wide_Wide_String; + Going : Direction := Forward) return Natural + is + begin + if Going = Forward then + for J in Source'Range loop + if Source (J) /= Wide_Wide_Space then + return J; + end if; + end loop; + + else -- Going = Backward + for J in reverse Source'Range loop + if Source (J) /= Wide_Wide_Space 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 : Wide_Wide_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.Wide_Wide_Search; |