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------------------------------------------------------------------------------ -- -- -- GNAT COMPILER COMPONENTS -- -- -- -- A L I -- -- -- -- S p e c -- -- -- -- Copyright (C) 1992-2009, 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. 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 COPYING3. If not, go to -- -- http://www.gnu.org/licenses for a complete copy of the 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 internal data structures used for representation -- of Ada Library Information (ALI) acquired from the ALI files generated -- by the front end. with Casing; use Casing; with Gnatvsn; use Gnatvsn; with Namet; use Namet; with Rident; use Rident; with Table; with Types; use Types; with GNAT.HTable; use GNAT.HTable; package ALI is -------------- -- Id Types -- -------------- -- The various entries are stored in tables with distinct subscript ranges. -- The following type definitions show the ranges used for the subscripts -- (Id values) for the various tables. type ALI_Id is range 0 .. 999_999; -- Id values used for ALIs table entries type Unit_Id is range 1_000_000 .. 1_999_999; -- Id values used for Unit table entries type With_Id is range 2_000_000 .. 2_999_999; -- Id values used for Withs table entries type Arg_Id is range 3_000_000 .. 3_999_999; -- Id values used for argument table entries type Sdep_Id is range 4_000_000 .. 4_999_999; -- Id values used for Sdep table entries type Source_Id is range 5_000_000 .. 5_999_999; -- Id values used for Source table entries type Interrupt_State_Id is range 6_000_000 .. 6_999_999; -- Id values used for Interrupt_State table entries type Priority_Specific_Dispatching_Id is range 7_000_000 .. 7_999_999; -- Id values used for Priority_Specific_Dispatching table entries -------------------- -- ALI File Table -- -------------------- -- Each ALI file read generates an entry in the ALIs table No_ALI_Id : constant ALI_Id := ALI_Id'First; -- Special value indicating no ALI entry First_ALI_Entry : constant ALI_Id := No_ALI_Id + 1; -- Id of first actual entry in table type Main_Program_Type is (None, Proc, Func); -- Indicator of whether unit can be used as main program type ALIs_Record is record Afile : File_Name_Type; -- Name of ALI file Ofile_Full_Name : File_Name_Type; -- Full name of object file corresponding to the ALI file Sfile : File_Name_Type; -- Name of source file that generates this ALI file (which is equal -- to the name of the source file in the first unit table entry for -- this ALI file, since the body if present is always first). Ver : String (1 .. Ver_Len_Max); -- Value of library version (V line in ALI file). Not set if -- V lines are ignored as a result of the Ignore_Lines parameter. Ver_Len : Natural; -- Length of characters stored in Ver. Not set if V lines are ignored as -- a result of the Ignore_Lines parameter. SAL_Interface : Boolean; -- Set True when this is an interface to a standalone library First_Unit : Unit_Id; -- Id of first Unit table entry for this file Last_Unit : Unit_Id; -- Id of last Unit table entry for this file First_Sdep : Sdep_Id; -- Id of first Sdep table entry for this file Last_Sdep : Sdep_Id; -- Id of last Sdep table entry for this file Main_Program : Main_Program_Type; -- Indicator of whether first unit can be used as main program. Not set -- if 'M' appears in Ignore_Lines. Main_Priority : Int; -- Indicates priority value if Main_Program field indicates that this -- can be a main program. A value of -1 (No_Main_Priority) indicates -- that no parameter was found, or no M line was present. Not set if -- 'M' appears in Ignore_Lines. Time_Slice_Value : Int; -- Indicates value of time slice parameter from T=xxx on main program -- line. A value of -1 indicates that no T=xxx parameter was found, or -- no M line was present. Not set if 'M' appears in Ignore_Lines. WC_Encoding : Character; -- Wide character encoding if main procedure. Otherwise not relevant. -- Not set if 'M' appears in Ignore_Lines. Locking_Policy : Character; -- Indicates locking policy for units in this file. Space means tasking -- was not used, or that no Locking_Policy pragma was present or that -- this is a language defined unit. Otherwise set to first character -- (upper case) of policy name. Not set if 'P' appears in Ignore_Lines. Queuing_Policy : Character; -- Indicates queuing policy for units in this file. Space means tasking -- was not used, or that no Queuing_Policy pragma was present or that -- this is a language defined unit. Otherwise set to first character -- (upper case) of policy name. Not set if 'P' appears in Ignore_Lines. Task_Dispatching_Policy : Character; -- Indicates task dispatching policy for units in this file. Space means -- tasking was not used, or that no Task_Dispatching_Policy pragma was -- present or that this is a language defined unit. Otherwise set to -- first character (upper case) of policy name. Not set if 'P' appears -- in Ignore_Lines. Compile_Errors : Boolean; -- Set to True if compile errors for unit. Note that No_Object will -- always be set as well in this case. Not set if 'P' appears in -- Ignore_Lines. Float_Format : Character; -- Set to float format (set to I if no float-format given). Not set if -- 'P' appears in Ignore_Lines. No_Object : Boolean; -- Set to True if no object file generated. Not set if 'P' appears in -- Ignore_Lines. Normalize_Scalars : Boolean; -- Set to True if file was compiled with Normalize_Scalars. Not set if -- 'P' appears in Ignore_Lines. Unit_Exception_Table : Boolean; -- Set to True if unit exception table pointer generated. Not set if 'P' -- appears in Ignore_Lines. Zero_Cost_Exceptions : Boolean; -- Set to True if file was compiled with zero cost exceptions. Not set -- if 'P' appears in Ignore_Lines. Restrictions : Restrictions_Info; -- Restrictions information reconstructed from R lines First_Interrupt_State : Interrupt_State_Id; Last_Interrupt_State : Interrupt_State_Id'Base; -- These point to the first and last entries in the interrupt state -- table for this unit. If no entries, then Last_Interrupt_State = -- First_Interrupt_State - 1 (that's why the 'Base reference is there, -- it can be one less than the lower bound of the subtype). Not set if -- 'I' appears in Ignore_Lines First_Specific_Dispatching : Priority_Specific_Dispatching_Id; Last_Specific_Dispatching : Priority_Specific_Dispatching_Id'Base; -- These point to the first and last entries in the priority specific -- dispatching table for this unit. If there are no entries, then -- Last_Specific_Dispatching = First_Specific_Dispatching - 1. That -- is why the 'Base reference is there, it can be one less than the -- lower bound of the subtype. Not set if 'S' appears in Ignore_Lines. end record; No_Main_Priority : constant Int := -1; -- Code for no main priority set package ALIs is new Table.Table ( Table_Component_Type => ALIs_Record, Table_Index_Type => ALI_Id, Table_Low_Bound => First_ALI_Entry, Table_Initial => 500, Table_Increment => 200, Table_Name => "ALIs"); ---------------- -- Unit Table -- ---------------- -- Each unit within an ALI file generates an entry in the unit table No_Unit_Id : constant Unit_Id := Unit_Id'First; -- Special value indicating no unit table entry First_Unit_Entry : constant Unit_Id := No_Unit_Id + 1; -- Id of first actual entry in table type Unit_Type is (Is_Spec, Is_Body, Is_Spec_Only, Is_Body_Only); -- Indicates type of entry, if both body and spec appear in the ALI file, -- then the first unit is marked Is_Body, and the second is marked Is_Spec. -- If only a spec appears, then it is marked as Is_Spec_Only, and if only -- a body appears, then it is marked Is_Body_Only). subtype Version_String is String (1 .. 8); -- Version string, taken from unit record type Unit_Record is record My_ALI : ALI_Id; -- Corresponding ALI entry Uname : Unit_Name_Type; -- Name of Unit Sfile : File_Name_Type; -- Name of source file Preelab : Boolean; -- Indicates presence of PR parameter for a preelaborated package No_Elab : Boolean; -- Indicates presence of NE parameter for a unit that has does not -- have an elaboration routine (since it has no elaboration code). Pure : Boolean; -- Indicates presence of PU parameter for a package having pragma Pure Dynamic_Elab : Boolean; -- Set to True if the unit was compiled with dynamic elaboration checks -- (i.e. either -gnatE or pragma Elaboration_Checks (RM) was used to -- compile the unit). Elaborate_Body : Boolean; -- Indicates presence of EB parameter for a package which has a pragma -- Elaborate_Body, and also for generic package instantiations. Set_Elab_Entity : Boolean; -- Indicates presence of EE parameter for a unit which has an -- elaboration entity which must be set true as part of the -- elaboration of the entity. Has_RACW : Boolean; -- Indicates presence of RA parameter for a package that declares at -- least one Remote Access to Class_Wide (RACW) object. Remote_Types : Boolean; -- Indicates presence of RT parameter for a package which has a -- pragma Remote_Types. Shared_Passive : Boolean; -- Indicates presence of SP parameter for a package which has a pragma -- Shared_Passive. RCI : Boolean; -- Indicates presence of RC parameter for a package which has a pragma -- Remote_Call_Interface. Predefined : Boolean; -- Indicates if unit is language predefined (or a child of such a unit) Internal : Boolean; -- Indicates if unit is an internal unit (or a child of such a unit) First_With : With_Id; -- Id of first withs table entry for this file Last_With : With_Id; -- Id of last withs table entry for this file First_Arg : Arg_Id; -- Id of first args table entry for this file Last_Arg : Arg_Id; -- Id of last args table entry for this file Utype : Unit_Type; -- Type of entry Is_Generic : Boolean; -- True for generic unit (i.e. a generic declaration, or a generic -- body). False for a non-generic unit. Unit_Kind : Character; -- Indicates the nature of the unit. 'p' for Packages and 's' for -- subprograms. Version : Version_String; -- Version of unit Icasing : Casing_Type; -- Indicates casing of identifiers in source file for this unit. This -- is used for informational output, and also for constructing the main -- unit if it is being built in Ada. Kcasing : Casing_Type; -- Indicates casing of keywords in source file for this unit. This is -- used for informational output, and also for constructing the main -- unit if it is being built in Ada. Elab_Position : aliased Natural; -- Initialized to zero. Set non-zero when a unit is chosen and -- placed in the elaboration order. The value represents the -- ordinal position in the elaboration order. Init_Scalars : Boolean; -- Set True if IS qualifier appears in ALI file, indicating that -- an Initialize_Scalars pragma applies to the unit. SAL_Interface : Boolean; -- Set True when this is an interface to a standalone library Body_Needed_For_SAL : Boolean; -- Indicates that the source for the body of the unit (subprogram, -- package, or generic unit) must be included in a standalone library. Elaborate_Body_Desirable : Boolean; -- Indicates that the front end elaboration circuitry decided that it -- would be a good idea if this package had Elaborate_Body. The binder -- will attempt, but does not promise, to place the elaboration call -- for the body right after the call for the spec, or at least as close -- together as possible. Optimize_Alignment : Character; -- Optimize_Alignment setting. Set to L/S/T/O for OL/OS/OT/OO present end record; package Units is new Table.Table ( Table_Component_Type => Unit_Record, Table_Index_Type => Unit_Id, Table_Low_Bound => First_Unit_Entry, Table_Initial => 100, Table_Increment => 200, Table_Name => "Unit"); --------------------------- -- Interrupt State Table -- --------------------------- -- An entry is made in this table for each I (interrupt state) line -- encountered in the input ALI file. The First/Last_Interrupt_Id -- fields of the ALI file entry show the range of entries defined -- within a particular ALI file. type Interrupt_State_Record is record Interrupt_Id : Nat; -- Id from interrupt state entry Interrupt_State : Character; -- State from interrupt state entry ('u'/'r'/'s') IS_Pragma_Line : Nat; -- Line number of Interrupt_State pragma end record; package Interrupt_States is new Table.Table ( Table_Component_Type => Interrupt_State_Record, Table_Index_Type => Interrupt_State_Id'Base, Table_Low_Bound => Interrupt_State_Id'First, Table_Initial => 100, Table_Increment => 200, Table_Name => "Interrupt_States"); ----------------------------------------- -- Priority Specific Dispatching Table -- ----------------------------------------- -- An entry is made in this table for each S (priority specific -- dispatching) line encountered in the input ALI file. The -- First/Last_Specific_Dispatching_Id fields of the ALI file -- entry show the range of entries defined within a particular -- ALI file. type Specific_Dispatching_Record is record Dispatching_Policy : Character; -- First character (upper case) of the corresponding policy name First_Priority : Nat; -- Lower bound of the priority range to which the specified dispatching -- policy applies. Last_Priority : Nat; -- Upper bound of the priority range to which the specified dispatching -- policy applies. PSD_Pragma_Line : Nat; -- Line number of Priority_Specific_Dispatching pragma end record; package Specific_Dispatching is new Table.Table ( Table_Component_Type => Specific_Dispatching_Record, Table_Index_Type => Priority_Specific_Dispatching_Id'Base, Table_Low_Bound => Priority_Specific_Dispatching_Id'First, Table_Initial => 100, Table_Increment => 200, Table_Name => "Priority_Specific_Dispatching"); -------------- -- Switches -- -------------- -- These switches record status information about ali files that -- have been read, for quick reference without searching tables. -- Note: a switch will be left set at its default value if the line -- which might otherwise set it is ignored (from Ignore_Lines). Dynamic_Elaboration_Checks_Specified : Boolean := False; -- Set to False by Initialize_ALI. Set to True if Scan_ALI reads -- a unit for which dynamic elaboration checking is enabled. Float_Format_Specified : Character := ' '; -- Set to blank by Initialize_ALI. Set to appropriate float format -- character (V or I, see Opt.Float_Format) if an ali file that -- is read contains an F line setting the floating point format. Initialize_Scalars_Used : Boolean := False; -- Set True if an ali file contains the Initialize_Scalars flag Locking_Policy_Specified : Character := ' '; -- Set to blank by Initialize_ALI. Set to the appropriate locking policy -- character if an ali file contains a P line setting the locking policy. No_Normalize_Scalars_Specified : Boolean := False; -- Set to False by Initialize_ALI. Set to True if an ali file indicates -- that the file was compiled without normalize scalars. No_Object_Specified : Boolean := False; -- Set to False by Initialize_ALI. Set to True if an ali file contains -- the No_Object flag. Normalize_Scalars_Specified : Boolean := False; -- Set to False by Initialize_ALI. Set to True if an ali file indicates -- that the file was compiled in Normalize_Scalars mode. Queuing_Policy_Specified : Character := ' '; -- Set to blank by Initialize_ALI. Set to the appropriate queuing policy -- character if an ali file contains a P line setting the queuing policy. Cumulative_Restrictions : Restrictions_Info := No_Restrictions; -- This variable records the cumulative contributions of R lines in all -- ali files, showing whether a restriction pragma exists anywhere, and -- accumulating the aggregate knowledge of violations. Stack_Check_Switch_Set : Boolean := False; -- Set to True if at least one ALI file contains '-fstack-check' in its -- argument list. Static_Elaboration_Model_Used : Boolean := False; -- Set to False by Initialize_ALI. Set to True if any ALI file for a -- non-internal unit compiled with the static elaboration model is -- encountered. Task_Dispatching_Policy_Specified : Character := ' '; -- Set to blank by Initialize_ALI. Set to the appropriate task dispatching -- policy character if an ali file contains a P line setting the -- task dispatching policy. Unreserve_All_Interrupts_Specified : Boolean := False; -- Set to False by Initialize_ALI. Set to True if an ali file is read that -- has P line specifying unreserve all interrupts mode. Zero_Cost_Exceptions_Specified : Boolean := False; -- Set to False by Initialize_ALI. Set to True if an ali file is read that -- has a P line specifying the generation of zero cost exceptions. ----------------- -- Withs Table -- ----------------- -- Each With line (W line) in an ALI file generates a Withs table entry -- Note: there will be no entries in this table if 'W' lines are ignored No_With_Id : constant With_Id := With_Id'First; -- Special value indicating no withs table entry First_With_Entry : constant With_Id := No_With_Id + 1; -- Id of first actual entry in table type With_Record is record Uname : Unit_Name_Type; -- Name of Unit Sfile : File_Name_Type; -- Name of source file, set to No_File in generic case Afile : File_Name_Type; -- Name of ALI file, set to No_File in generic case Elaborate : Boolean; -- Indicates presence of E parameter Elaborate_All : Boolean; -- Indicates presence of EA parameter Elab_All_Desirable : Boolean; -- Indicates presence of AD parameter Elab_Desirable : Boolean; -- Indicates presence of ED parameter SAL_Interface : Boolean := False; -- True if the Unit is an Interface of a Stand-Alone Library Limited_With : Boolean := False; -- True if unit is named in a limited_with_clause end record; package Withs is new Table.Table ( Table_Component_Type => With_Record, Table_Index_Type => With_Id, Table_Low_Bound => First_With_Entry, Table_Initial => 5000, Table_Increment => 200, Table_Name => "Withs"); --------------------- -- Arguments Table -- --------------------- -- Each Arg line (A line) in an ALI file generates an Args table entry -- Note: there will be no entries in this table if 'A' lines are ignored No_Arg_Id : constant Arg_Id := Arg_Id'First; -- Special value indicating no args table entry First_Arg_Entry : constant Arg_Id := No_Arg_Id + 1; -- Id of first actual entry in table package Args is new Table.Table ( Table_Component_Type => String_Ptr, Table_Index_Type => Arg_Id, Table_Low_Bound => First_Arg_Entry, Table_Initial => 1000, Table_Increment => 100, Table_Name => "Args"); -------------------------- -- Linker_Options Table -- -------------------------- -- If an ALI file has one of more Linker_Options lines, then a single -- entry is made in this table. If more than one Linker_Options lines -- appears in a given ALI file, then the arguments are concatenated -- to form the entry in this table, using a NUL character as the -- separator, and a final NUL character is appended to the end. -- Note: there will be no entries in this table if 'L' lines are ignored type Linker_Option_Record is record Name : Name_Id; -- Name entry containing concatenated list of Linker_Options -- arguments separated by NUL and ended by NUL as described above. Unit : Unit_Id; -- Unit_Id for the entry Internal_File : Boolean; -- Set True if the linker options are from an internal file. This is -- used to insert certain standard entries after all the user entries -- but before the entries from the run-time. Original_Pos : Positive; -- Keep track of original position in the linker options table. This -- is used to implement a stable sort when we sort the linker options -- table. end record; -- Declare the Linker_Options Table -- The indexes of active entries in this table range from 1 to the -- value of Linker_Options.Last. The zero'th element is for sort call. package Linker_Options is new Table.Table ( Table_Component_Type => Linker_Option_Record, Table_Index_Type => Integer, Table_Low_Bound => 0, Table_Initial => 200, Table_Increment => 400, Table_Name => "Linker_Options"); ------------------------------------------- -- External Version Reference Hash Table -- ------------------------------------------- -- This hash table keeps track of external version reference strings -- as read from E lines in the ali file. The stored values do not -- include the terminating quote characters. -- Note: there will be no entries in this table if 'E' lines are ignored type Vindex is range 0 .. 98; -- Type to define range of headers function SHash (S : String_Ptr) return Vindex; -- Hash function for this table function SEq (F1, F2 : String_Ptr) return Boolean; -- Equality function for this table package Version_Ref is new Simple_HTable ( Header_Num => Vindex, Element => Boolean, No_Element => False, Key => String_Ptr, Hash => SHash, Equal => SEq); ------------------------- -- No_Dependency Table -- ------------------------- -- Each R line for a No_Dependency Restriction generates an entry in -- this No_Dependency table. type No_Dep_Record is record ALI_File : ALI_Id; -- ALI File containing the entry No_Dep_Unit : Name_Id; -- Id for names table entry including entire name, including periods end record; package No_Deps is new Table.Table ( Table_Component_Type => No_Dep_Record, Table_Index_Type => Integer, Table_Low_Bound => 0, Table_Initial => 200, Table_Increment => 400, Table_Name => "No_Deps"); ------------------------------------ -- Sdep (Source Dependency) Table -- ------------------------------------ -- Each source dependency (D line) in an ALI file generates an entry in the -- Sdep table. -- Note: there will be no entries in this table if 'D' lines are ignored No_Sdep_Id : constant Sdep_Id := Sdep_Id'First; -- Special value indicating no Sdep table entry First_Sdep_Entry : Sdep_Id := No_Sdep_Id + 1; -- Id of first Sdep entry for current ali file. This is initialized to the -- first Sdep entry in the table, and then incremented appropriately as -- successive ALI files are scanned. type Sdep_Record is record Sfile : File_Name_Type; -- Name of source file Stamp : Time_Stamp_Type; -- Time stamp value. Note that this will be all zero characters for the -- dummy entries for missing or non-dependent files. Checksum : Word; -- Checksum value. Note that this will be all zero characters for the -- dummy entries for missing or non-dependent files Dummy_Entry : Boolean; -- Set True for dummy entries that correspond to missing files or files -- where no dependency relationship exists. Subunit_Name : Name_Id; -- Name_Id for subunit name if present, else No_Name Rfile : File_Name_Type; -- Reference file name. Same as Sfile unless a Source_Reference pragma -- was used, in which case it reflects the name used in the pragma. Start_Line : Nat; -- Starting line number in file. Always 1, unless a Source_Reference -- pragma was used, in which case it reflects the line number value -- given in the pragma. end record; package Sdep is new Table.Table ( Table_Component_Type => Sdep_Record, Table_Index_Type => Sdep_Id, Table_Low_Bound => First_Sdep_Entry, Table_Initial => 5000, Table_Increment => 200, Table_Name => "Sdep"); ---------------------------- -- Use of Name Table Info -- ---------------------------- -- All unit names and file names are entered into the Names table. The Info -- fields of these entries are used as follows: -- Unit name Info field has Unit_Id of unit table entry -- ALI file name Info field has ALI_Id of ALI table entry -- Source file name Info field has Source_Id of source table entry -------------------------- -- Cross-Reference Data -- -------------------------- -- The following table records cross-reference sections, there is one entry -- for each X header line in the ALI file for an xref section. -- Note: there will be no entries in this table if 'X' lines are ignored type Xref_Section_Record is record File_Num : Sdep_Id; -- Dependency number for file (entry in Sdep.Table) File_Name : File_Name_Type; -- Name of file First_Entity : Nat; -- First entry in Xref_Entity table Last_Entity : Nat; -- Last entry in Xref_Entity table end record; package Xref_Section is new Table.Table ( Table_Component_Type => Xref_Section_Record, Table_Index_Type => Nat, Table_Low_Bound => 1, Table_Initial => 50, Table_Increment => 300, Table_Name => "Xref_Section"); -- The following is used to indicate whether a typeref field is present -- for the entity, and if so what kind of typeref field. type Tref_Kind is ( Tref_None, -- No typeref present Tref_Access, -- Access type typeref (points to designated type) Tref_Derived, -- Derived type typeref (points to parent type) Tref_Type); -- All other cases -- The following table records entities for which xrefs are recorded type Xref_Entity_Record is record Line : Pos; -- Line number of definition Etype : Character; -- Set to the identification character for the entity. See section -- "Cross-Reference Entity Identifiers" in lib-xref.ads for details. Col : Pos; -- Column number of definition Lib : Boolean; -- True if entity is library level entity Entity : Name_Id; -- Name of entity Iref_File_Num : Sdep_Id; -- This field is set to the dependency reference for the file containing -- the generic entity that this one instantiates, or to No_Sdep_Id if -- the current entity is not an instantiation Iref_Line : Nat; -- This field is set to the line number in Iref_File_Num of the generic -- entity that this one instantiates, or to zero if the current entity -- is not an instantiation. Rref_Line : Nat; -- This field is set to the line number of a renaming reference if -- one is present, or to zero if no renaming reference is present Rref_Col : Nat; -- This field is set to the column number of a renaming reference -- if one is present, or to zero if no renaming reference is present. Tref : Tref_Kind; -- Indicates if a typeref is present, and if so what kind. Set to -- Tref_None if no typeref field is present. Tref_File_Num : Sdep_Id; -- This field is set to No_Sdep_Id if no typeref is present, or -- if the typeref refers to an entity in standard. Otherwise it -- it is the dependency reference for the file containing the -- declaration of the typeref entity. Tref_Line : Nat; -- This field is set to zero if no typeref is present, or if the -- typeref refers to an entity in standard. Otherwise it contains -- the line number of the declaration of the typeref entity. Tref_Type : Character; -- This field is set to blank if no typeref is present, or if the -- typeref refers to an entity in standard. Otherwise it contains -- the identification character for the typeref entity. See section -- "Cross-Reference Entity Identifiers" in lib-xref.ads for details. Tref_Col : Nat; -- This field is set to zero if no typeref is present, or if the -- typeref refers to an entity in standard. Otherwise it contains -- the column number of the declaration of the parent type. Tref_Standard_Entity : Name_Id; -- This field is set to No_Name if no typeref is present or if the -- typeref refers to a declared entity rather than an entity in -- package Standard. If there is a typeref that references an -- entity in package Standard, then this field is a Name_Id -- reference for the entity name. Oref_File_Num : Sdep_Id; -- This field is set to No_Sdep_Id if the entity doesn't override any -- other entity, or to the dependency reference for the overridden -- entity. Oref_Line : Nat; Oref_Col : Nat; -- These two fields are set to the line and column of the overridden -- entity. First_Xref : Nat; -- Index into Xref table of first cross-reference Last_Xref : Nat; -- Index into Xref table of last cross-reference. The value in -- Last_Xref can be less than the First_Xref value to indicate -- that no entries are present in the Xref Table. end record; package Xref_Entity is new Table.Table ( Table_Component_Type => Xref_Entity_Record, Table_Index_Type => Nat, Table_Low_Bound => 1, Table_Initial => 500, Table_Increment => 300, Table_Name => "Xref_Entity"); Array_Index_Reference : constant Character := '*'; Interface_Reference : constant Character := 'I'; -- Some special types of references. In the ALI file itself, these -- are output as attributes of the entity, not as references, but -- there is no provision in Xref_Entity_Record for storing multiple -- such references. -- The following table records actual cross-references type Xref_Record is record File_Num : Sdep_Id; -- Set to the file dependency number for the cross-reference. Note -- that if no file entry is present explicitly, this is just a copy -- of the reference for the current cross-reference section. Line : Nat; -- Line number for the reference. This is zero when referencing a -- predefined entity, but in this case Name is set. Rtype : Character; -- Indicates type of reference, using code used in ALI file: -- r = reference -- m = modification -- b = body entity -- c = completion of private or incomplete type -- x = type extension -- i = implicit reference -- Array_Index_Reference = reference to the index of an array -- Interface_Reference = reference to an interface implemented -- by the type -- See description in lib-xref.ads for further details Col : Nat; -- Column number for the reference Name : Name_Id := No_Name; -- This is only used when referencing a predefined entity. Currently, -- this only occurs for array indexes. -- Note: for instantiation references, Rtype is set to ' ', and Col is -- set to zero. One or more such entries can follow any other reference. -- When there is more than one such entry, this is to be read as: -- e.g. ref1 ref2 ref3 -- ref1 is a reference to an entity that was instantied at ref2. -- ref2 itself is also the result of an instantiation, that took -- place at ref3 end record; package Xref is new Table.Table ( Table_Component_Type => Xref_Record, Table_Index_Type => Nat, Table_Low_Bound => 1, Table_Initial => 2000, Table_Increment => 300, Table_Name => "Xref"); -------------------------------------- -- Subprograms for Reading ALI File -- -------------------------------------- procedure Initialize_ALI; -- Initialize the ALI tables. Also resets all switch values to defaults function Scan_ALI (F : File_Name_Type; T : Text_Buffer_Ptr; Ignore_ED : Boolean; Err : Boolean; Read_Xref : Boolean := False; Read_Lines : String := ""; Ignore_Lines : String := "X"; Ignore_Errors : Boolean := False) return ALI_Id; -- Given the text, T, of an ALI file, F, scan and store the information -- from the file, and return the Id of the resulting entry in the ALI -- table. Switch settings may be modified as described above in the -- switch description settings. -- -- Ignore_ED is normally False. If set to True, it indicates that -- all AD/ED (elaboration desirable) indications in the ALI file are -- to be ignored. This parameter is obsolete now that the -f switch -- is removed from gnatbind, and should be removed ??? -- -- Err determines the action taken on an incorrectly formatted file. -- If Err is False, then an error message is output, and the program -- is terminated. If Err is True, then no error message is output, -- and No_ALI_Id is returned. -- -- Ignore_Lines requests that Scan_ALI ignore any lines that start -- with any given key character. The default value of X causes all -- Xref lines to be ignored. The corresponding data in the ALI -- tables will not be filled in this case. It is not possible -- to ignore U (unit) lines, they are always read. -- -- Read_Lines requests that Scan_ALI process only lines that start -- with one of the given characters. The corresponding data in the -- ALI file for any characters not given in the list will not be -- set. The default value of the null string indicates that all -- lines should be read (unless Ignore_Lines is specified). U -- (unit) lines are always read regardless of the value of this -- parameter. -- -- Note: either Ignore_Lines or Read_Lines should be non-null, but not -- both. If both are provided then only the Read_Lines value is used, -- and the Ignore_Lines parameter is ignored. -- -- Read_XREF is set True to read and acquire the cross-reference -- information. If Read_XREF is set to True, then the effect is to ignore -- all lines other than U, W, D and X lines and the Ignore_Lines and -- Read_Lines parameters are ignored (i.e. the use of True for Read_XREF -- is equivalent to specifying an argument of "UWDX" for Read_Lines. -- -- Ignore_Errors is normally False. If it is set True, then Scan_ALI -- will do its best to scan through a file and extract all information -- it can, even if there are errors. In this case Err is only set if -- Scan_ALI was completely unable to process the file (e.g. it did not -- look like an ALI file at all). Ignore_Errors is intended to improve -- the downward compatibility of new compilers with old tools. end ALI;
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