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diff --git a/gcc-4.8.3/gcc/ada/types.ads b/gcc-4.8.3/gcc/ada/types.ads new file mode 100644 index 000000000..a63e10c97 --- /dev/null +++ b/gcc-4.8.3/gcc/ada/types.ads @@ -0,0 +1,877 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT COMPILER COMPONENTS -- +-- -- +-- T Y P E S -- +-- -- +-- S p e c -- +-- -- +-- Copyright (C) 1992-2012, 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. -- +-- -- +------------------------------------------------------------------------------ + +-- This package contains host independent type definitions which are used +-- in more than one unit in the compiler. They are gathered here for easy +-- reference, although in some cases the full description is found in the +-- relevant module which implements the definition. The main reason that they +-- are not in their "natural" specs is that this would cause a lot of inter- +-- spec dependencies, and in particular some awkward circular dependencies +-- would have to be dealt with. + +-- WARNING: There is a C version of this package. Any changes to this source +-- file must be properly reflected in the C header file types.h declarations. + +-- Note: the declarations in this package reflect an expectation that the host +-- machine has an efficient integer base type with a range at least 32 bits +-- 2s-complement. If there are any machines for which this is not a correct +-- assumption, a significant number of changes will be required! + +with System; +with Unchecked_Conversion; +with Unchecked_Deallocation; + +package Types is + pragma Preelaborate; + + ------------------------------- + -- General Use Integer Types -- + ------------------------------- + + type Int is range -2 ** 31 .. +2 ** 31 - 1; + -- Signed 32-bit integer + + subtype Nat is Int range 0 .. Int'Last; + -- Non-negative Int values + + subtype Pos is Int range 1 .. Int'Last; + -- Positive Int values + + type Word is mod 2 ** 32; + -- Unsigned 32-bit integer + + type Short is range -32768 .. +32767; + for Short'Size use 16; + -- 16-bit signed integer + + type Byte is mod 2 ** 8; + for Byte'Size use 8; + -- 8-bit unsigned integer + + type size_t is mod 2 ** Standard'Address_Size; + -- Memory size value, for use in calls to C routines + + -------------------------------------- + -- 8-Bit Character and String Types -- + -------------------------------------- + + -- We use Standard.Character and Standard.String freely, since we are + -- compiling ourselves, and we properly implement the required 8-bit + -- character code as required in Ada 95. This section defines a few + -- general use constants and subtypes. + + EOF : constant Character := ASCII.SUB; + -- The character SUB (16#1A#) is used in DOS and other systems derived + -- from DOS (XP, NT etc) to signal the end of a text file. Internally + -- all source files are ended by an EOF character, even on Unix systems. + -- An EOF character acts as the end of file only as the last character + -- of a source buffer, in any other position, it is treated as a blank + -- if it appears between tokens, and as an illegal character otherwise. + -- This makes life easier dealing with files that originated from DOS, + -- including concatenated files with interspersed EOF characters. + + subtype Graphic_Character is Character range ' ' .. '~'; + -- Graphic characters, as defined in ARM + + subtype Line_Terminator is Character range ASCII.LF .. ASCII.CR; + -- Line terminator characters (LF, VT, FF, CR). For further details, + -- see the extensive discussion of line termination in the Sinput spec. + + subtype Upper_Half_Character is + Character range Character'Val (16#80#) .. Character'Val (16#FF#); + -- Characters with the upper bit set + + type Character_Ptr is access all Character; + type String_Ptr is access all String; + -- Standard character and string pointers + + procedure Free is new Unchecked_Deallocation (String, String_Ptr); + -- Procedure for freeing dynamically allocated String values + + subtype Big_String is String (Positive); + type Big_String_Ptr is access all Big_String; + -- Virtual type for handling imported big strings. Note that we should + -- never have any allocators for this type, but we don't give a storage + -- size of zero, since there are legitimate deallocations going on. + + function To_Big_String_Ptr is + new Unchecked_Conversion (System.Address, Big_String_Ptr); + -- Used to obtain Big_String_Ptr values from external addresses + + subtype Word_Hex_String is String (1 .. 8); + -- Type used to represent Word value as 8 hex digits, with lower case + -- letters for the alphabetic cases. + + function Get_Hex_String (W : Word) return Word_Hex_String; + -- Convert word value to 8-character hex string + + ----------------------------------------- + -- Types Used for Text Buffer Handling -- + ----------------------------------------- + + -- We can not use type String for text buffers, since we must use the + -- standard 32-bit integer as an index value, since we count on all index + -- values being the same size. + + type Text_Ptr is new Int; + -- Type used for subscripts in text buffer + + type Text_Buffer is array (Text_Ptr range <>) of Character; + -- Text buffer used to hold source file or library information file + + type Text_Buffer_Ptr is access all Text_Buffer; + -- Text buffers for input files are allocated dynamically and this type + -- is used to reference these text buffers. + + procedure Free is new Unchecked_Deallocation (Text_Buffer, Text_Buffer_Ptr); + -- Procedure for freeing dynamically allocated text buffers + + ------------------------------------------ + -- Types Used for Source Input Handling -- + ------------------------------------------ + + type Logical_Line_Number is range 0 .. Int'Last; + for Logical_Line_Number'Size use 32; + -- Line number type, used for storing logical line numbers (i.e. line + -- numbers that include effects of any Source_Reference pragmas in the + -- source file). The value zero indicates a line containing a source + -- reference pragma. + + No_Line_Number : constant Logical_Line_Number := 0; + -- Special value used to indicate no line number + + type Physical_Line_Number is range 1 .. Int'Last; + for Physical_Line_Number'Size use 32; + -- Line number type, used for storing physical line numbers (i.e. line + -- numbers in the physical file being compiled, unaffected by the presence + -- of source reference pragmas. + + type Column_Number is range 0 .. 32767; + for Column_Number'Size use 16; + -- Column number (assume that 2**15 - 1 is large enough). The range for + -- this type is used to compute Hostparm.Max_Line_Length. See also the + -- processing for -gnatyM in Stylesw). + + No_Column_Number : constant Column_Number := 0; + -- Special value used to indicate no column number + + subtype Source_Buffer is Text_Buffer; + -- Type used to store text of a source file. The buffer for the main + -- source (the source specified on the command line) has a lower bound + -- starting at zero. Subsequent subsidiary sources have lower bounds + -- which are one greater than the previous upper bound. + + subtype Big_Source_Buffer is Text_Buffer (0 .. Text_Ptr'Last); + -- This is a virtual type used as the designated type of the access type + -- Source_Buffer_Ptr, see Osint.Read_Source_File for details. + + type Source_Buffer_Ptr is access all Big_Source_Buffer; + -- Pointer to source buffer. We use virtual origin addressing for source + -- buffers, with thin pointers. The pointer points to a virtual instance + -- of type Big_Source_Buffer, where the actual type is in fact of type + -- Source_Buffer. The address is adjusted so that the virtual origin + -- addressing works correctly. See Osint.Read_Source_Buffer for further + -- details. Again, as for Big_String_Ptr, we should never allocate using + -- this type, but we don't give a storage size clause of zero, since we + -- may end up doing deallocations of instances allocated manually. + + subtype Source_Ptr is Text_Ptr; + -- Type used to represent a source location, which is a subscript of a + -- character in the source buffer. As noted above, different source buffers + -- have different ranges, so it is possible to tell from a Source_Ptr value + -- which source it refers to. Note that negative numbers are allowed to + -- accommodate the following special values. + + No_Location : constant Source_Ptr := -1; + -- Value used to indicate no source position set in a node. A test for a + -- Source_Ptr value being > No_Location is the approved way to test for a + -- standard value that does not include No_Location or any of the following + -- special definitions. One important use of No_Location is to label + -- generated nodes that we don't want the debugger to see in normal mode + -- (very often we conditionalize so that we set No_Location in normal mode + -- and the corresponding source line in -gnatD mode). + + Standard_Location : constant Source_Ptr := -2; + -- Used for all nodes in the representation of package Standard other than + -- nodes representing the contents of Standard.ASCII. Note that testing for + -- a value being <= Standard_Location tests for both Standard_Location and + -- for Standard_ASCII_Location. + + Standard_ASCII_Location : constant Source_Ptr := -3; + -- Used for all nodes in the presentation of package Standard.ASCII + + System_Location : constant Source_Ptr := -4; + -- Used to identify locations of pragmas scanned by Targparm, where we know + -- the location is in System, but we don't know exactly what line. + + First_Source_Ptr : constant Source_Ptr := 0; + -- Starting source pointer index value for first source program + + ------------------------------------- + -- Range Definitions for Tree Data -- + ------------------------------------- + + -- The tree has fields that can hold any of the following types: + + -- Pointers to other tree nodes (type Node_Id) + -- List pointers (type List_Id) + -- Element list pointers (type Elist_Id) + -- Names (type Name_Id) + -- Strings (type String_Id) + -- Universal integers (type Uint) + -- Universal reals (type Ureal) + + -- In most contexts, the strongly typed interface determines which of these + -- types is present. However, there are some situations (involving untyped + -- traversals of the tree), where it is convenient to be easily able to + -- distinguish these values. The underlying representation in all cases is + -- an integer type Union_Id, and we ensure that the range of the various + -- possible values for each of the above types is disjoint so that this + -- distinction is possible. + + -- Note: it is also helpful for debugging purposes to make these ranges + -- distinct. If a bug leads to misidentification of a value, then it will + -- typically result in an out of range value and a Constraint_Error. + + type Union_Id is new Int; + -- The type in the tree for a union of possible ID values + + List_Low_Bound : constant := -100_000_000; + -- The List_Id values are subscripts into an array of list headers which + -- has List_Low_Bound as its lower bound. This value is chosen so that all + -- List_Id values are negative, and the value zero is in the range of both + -- List_Id and Node_Id values (see further description below). + + List_High_Bound : constant := 0; + -- Maximum List_Id subscript value. This allows up to 100 million list Id + -- values, which is in practice infinite, and there is no need to check the + -- range. The range overlaps the node range by one element (with value + -- zero), which is used both for the Empty node, and for indicating no + -- list. The fact that the same value is used is convenient because it + -- means that the default value of Empty applies to both nodes and lists, + -- and also is more efficient to test for. + + Node_Low_Bound : constant := 0; + -- The tree Id values start at zero, because we use zero for Empty (to + -- allow a zero test for Empty). Actual tree node subscripts start at 0 + -- since Empty is a legitimate node value. + + Node_High_Bound : constant := 099_999_999; + -- Maximum number of nodes that can be allocated is 100 million, which + -- is in practice infinite, and there is no need to check the range. + + Elist_Low_Bound : constant := 100_000_000; + -- The Elist_Id values are subscripts into an array of elist headers which + -- has Elist_Low_Bound as its lower bound. + + Elist_High_Bound : constant := 199_999_999; + -- Maximum Elist_Id subscript value. This allows up to 100 million Elists, + -- which is in practice infinite and there is no need to check the range. + + Elmt_Low_Bound : constant := 200_000_000; + -- Low bound of element Id values. The use of these values is internal to + -- the Elists package, but the definition of the range is included here + -- since it must be disjoint from other Id values. The Elmt_Id values are + -- subscripts into an array of list elements which has this as lower bound. + + Elmt_High_Bound : constant := 299_999_999; + -- Upper bound of Elmt_Id values. This allows up to 100 million element + -- list members, which is in practice infinite (no range check needed). + + Names_Low_Bound : constant := 300_000_000; + -- Low bound for name Id values + + Names_High_Bound : constant := 399_999_999; + -- Maximum number of names that can be allocated is 100 million, which is + -- in practice infinite and there is no need to check the range. + + Strings_Low_Bound : constant := 400_000_000; + -- Low bound for string Id values + + Strings_High_Bound : constant := 499_999_999; + -- Maximum number of strings that can be allocated is 100 million, which + -- is in practice infinite and there is no need to check the range. + + Ureal_Low_Bound : constant := 500_000_000; + -- Low bound for Ureal values + + Ureal_High_Bound : constant := 599_999_999; + -- Maximum number of Ureal values stored is 100_000_000 which is in + -- practice infinite so that no check is required. + + Uint_Low_Bound : constant := 600_000_000; + -- Low bound for Uint values + + Uint_Table_Start : constant := 2_000_000_000; + -- Location where table entries for universal integers start (see + -- Uintp spec for details of the representation of Uint values). + + Uint_High_Bound : constant := 2_099_999_999; + -- The range of Uint values is very large, since a substantial part + -- of this range is used to store direct values, see Uintp for details. + + -- The following subtype definitions are used to provide convenient names + -- for membership tests on Int values to see what data type range they + -- lie in. Such tests appear only in the lowest level packages. + + subtype List_Range is Union_Id + range List_Low_Bound .. List_High_Bound; + + subtype Node_Range is Union_Id + range Node_Low_Bound .. Node_High_Bound; + + subtype Elist_Range is Union_Id + range Elist_Low_Bound .. Elist_High_Bound; + + subtype Elmt_Range is Union_Id + range Elmt_Low_Bound .. Elmt_High_Bound; + + subtype Names_Range is Union_Id + range Names_Low_Bound .. Names_High_Bound; + + subtype Strings_Range is Union_Id + range Strings_Low_Bound .. Strings_High_Bound; + + subtype Uint_Range is Union_Id + range Uint_Low_Bound .. Uint_High_Bound; + + subtype Ureal_Range is Union_Id + range Ureal_Low_Bound .. Ureal_High_Bound; + + ----------------------------- + -- Types for Atree Package -- + ----------------------------- + + -- Node_Id values are used to identify nodes in the tree. They are + -- subscripts into the Nodes table declared in package Atree. Note that + -- the special values Empty and Error are subscripts into this table. + -- See package Atree for further details. + + type Node_Id is range Node_Low_Bound .. Node_High_Bound; + -- Type used to identify nodes in the tree + + subtype Entity_Id is Node_Id; + -- A synonym for node types, used in the Einfo package to refer to nodes + -- that are entities (i.e. nodes with an Nkind of N_Defining_xxx). All such + -- nodes are extended nodes and these are the only extended nodes, so that + -- in practice entity and extended nodes are synonymous. + + subtype Node_Or_Entity_Id is Node_Id; + -- A synonym for node types, used in cases where a given value may be used + -- to represent either a node or an entity. We like to minimize such uses + -- for obvious reasons of logical type consistency, but where such uses + -- occur, they should be documented by use of this type. + + Empty : constant Node_Id := Node_Low_Bound; + -- Used to indicate null node. A node is actually allocated with this + -- Id value, so that Nkind (Empty) = N_Empty. Note that Node_Low_Bound + -- is zero, so Empty = No_List = zero. + + Empty_List_Or_Node : constant := 0; + -- This constant is used in situations (e.g. initializing empty fields) + -- where the value set will be used to represent either an empty node or + -- a non-existent list, depending on the context. + + Error : constant Node_Id := Node_Low_Bound + 1; + -- Used to indicate an error in the source program. A node is actually + -- allocated with this Id value, so that Nkind (Error) = N_Error. + + Empty_Or_Error : constant Node_Id := Error; + -- Since Empty and Error are the first two Node_Id values, the test for + -- N <= Empty_Or_Error tests to see if N is Empty or Error. This definition + -- provides convenient self-documentation for such tests. + + First_Node_Id : constant Node_Id := Node_Low_Bound; + -- Subscript of first allocated node. Note that Empty and Error are both + -- allocated nodes, whose Nkind fields can be accessed without error. + + ------------------------------ + -- Types for Nlists Package -- + ------------------------------ + + -- List_Id values are used to identify node lists stored in the tree, so + -- that each node can be on at most one such list (see package Nlists for + -- further details). Note that the special value Error_List is a subscript + -- in this table, but the value No_List is *not* a valid subscript, and any + -- attempt to apply list operations to No_List will cause a (detected) + -- error. + + type List_Id is range List_Low_Bound .. List_High_Bound; + -- Type used to identify a node list + + No_List : constant List_Id := List_High_Bound; + -- Used to indicate absence of a list. Note that the value is zero, which + -- is the same as Empty, which is helpful in initializing nodes where a + -- value of zero can represent either an empty node or an empty list. + + Error_List : constant List_Id := List_Low_Bound; + -- Used to indicate that there was an error in the source program in a + -- context which would normally require a list. This node appears to be + -- an empty list to the list operations (a null list is actually allocated + -- which has this Id value). + + First_List_Id : constant List_Id := Error_List; + -- Subscript of first allocated list header + + ------------------------------ + -- Types for Elists Package -- + ------------------------------ + + -- Element list Id values are used to identify element lists stored outside + -- of the tree, allowing nodes to be members of more than one such list + -- (see package Elists for further details). + + type Elist_Id is range Elist_Low_Bound .. Elist_High_Bound; + -- Type used to identify an element list (Elist header table subscript) + + No_Elist : constant Elist_Id := Elist_Low_Bound; + -- Used to indicate absence of an element list. Note that this is not an + -- actual Elist header, so element list operations on this value are not + -- valid. + + First_Elist_Id : constant Elist_Id := No_Elist + 1; + -- Subscript of first allocated Elist header + + -- Element Id values are used to identify individual elements of an element + -- list (see package Elists for further details). + + type Elmt_Id is range Elmt_Low_Bound .. Elmt_High_Bound; + -- Type used to identify an element list + + No_Elmt : constant Elmt_Id := Elmt_Low_Bound; + -- Used to represent empty element + + First_Elmt_Id : constant Elmt_Id := No_Elmt + 1; + -- Subscript of first allocated Elmt table entry + + ------------------------------- + -- Types for Stringt Package -- + ------------------------------- + + -- String_Id values are used to identify entries in the strings table. They + -- are subscripts into the Strings table defined in package Stringt. + + -- Note that with only a few exceptions, which are clearly documented, the + -- type String_Id should be regarded as a private type. In particular it is + -- never appropriate to perform arithmetic operations using this type. + -- Doesn't this also apply to all other *_Id types??? + + type String_Id is range Strings_Low_Bound .. Strings_High_Bound; + -- Type used to identify entries in the strings table + + No_String : constant String_Id := Strings_Low_Bound; + -- Used to indicate missing string Id. Note that the value zero is used + -- to indicate a missing data value for all the Int types in this section. + + First_String_Id : constant String_Id := No_String + 1; + -- First subscript allocated in string table + + ------------------------- + -- Character Code Type -- + ------------------------- + + -- The type Char is used for character data internally in the compiler, but + -- character codes in the source are represented by the Char_Code type. + -- Each character literal in the source is interpreted as being one of the + -- 16#7FFF_FFFF# possible Wide_Wide_Character codes, and a unique Integer + -- value is assigned, corresponding to the UTF-32 value, which also + -- corresponds to the Pos value in the Wide_Wide_Character type, and also + -- corresponds to the Pos value in the Wide_Character and Character types + -- for values that are in appropriate range. String literals are similarly + -- interpreted as a sequence of such codes. + + type Char_Code_Base is mod 2 ** 32; + for Char_Code_Base'Size use 32; + + subtype Char_Code is Char_Code_Base range 0 .. 16#7FFF_FFFF#; + for Char_Code'Value_Size use 32; + for Char_Code'Object_Size use 32; + + function Get_Char_Code (C : Character) return Char_Code; + pragma Inline (Get_Char_Code); + -- Function to obtain internal character code from source character. For + -- the moment, the internal character code is simply the Pos value of the + -- input source character, but we provide this interface for possible + -- later support of alternative character sets. + + function In_Character_Range (C : Char_Code) return Boolean; + pragma Inline (In_Character_Range); + -- Determines if the given character code is in range of type Character, + -- and if so, returns True. If not, returns False. + + function In_Wide_Character_Range (C : Char_Code) return Boolean; + pragma Inline (In_Wide_Character_Range); + -- Determines if the given character code is in range of the type + -- Wide_Character, and if so, returns True. If not, returns False. + + function Get_Character (C : Char_Code) return Character; + pragma Inline (Get_Character); + -- For a character C that is in Character range (see above function), this + -- function returns the corresponding Character value. It is an error to + -- call Get_Character if C is not in Character range. + + function Get_Wide_Character (C : Char_Code) return Wide_Character; + -- For a character C that is in Wide_Character range (see above function), + -- this function returns the corresponding Wide_Character value. It is an + -- error to call Get_Wide_Character if C is not in Wide_Character range. + + --------------------------------------- + -- Types used for Library Management -- + --------------------------------------- + + type Unit_Number_Type is new Int; + -- Unit number. The main source is unit 0, and subsidiary sources have + -- non-zero numbers starting with 1. Unit numbers are used to index the + -- Units table in package Lib. + + Main_Unit : constant Unit_Number_Type := 0; + -- Unit number value for main unit + + No_Unit : constant Unit_Number_Type := -1; + -- Special value used to signal no unit + + type Source_File_Index is new Int range -1 .. Int'Last; + -- Type used to index the source file table (see package Sinput) + + Internal_Source_File : constant Source_File_Index := + Source_File_Index'First; + -- Value used to indicate the buffer for the source-code-like strings + -- internally created withing the compiler (see package Sinput) + + No_Source_File : constant Source_File_Index := 0; + -- Value used to indicate no source file present + + ----------------------------------- + -- Representation of Time Stamps -- + ----------------------------------- + + -- All compiled units are marked with a time stamp which is derived from + -- the source file (we assume that the host system has the concept of a + -- file time stamp which is modified when a file is modified). These + -- time stamps are used to ensure consistency of the set of units that + -- constitutes a library. Time stamps are 12 character strings with + -- with the following format: + + -- YYYYMMDDHHMMSS + + -- YYYY year + -- MM month (2 digits 01-12) + -- DD day (2 digits 01-31) + -- HH hour (2 digits 00-23) + -- MM minutes (2 digits 00-59) + -- SS seconds (2 digits 00-59) + + -- In the case of Unix systems (and other systems which keep the time in + -- GMT), the time stamp is the GMT time of the file, not the local time. + -- This solves problems in using libraries across networks with clients + -- spread across multiple time-zones. + + Time_Stamp_Length : constant := 14; + -- Length of time stamp value + + subtype Time_Stamp_Index is Natural range 1 .. Time_Stamp_Length; + type Time_Stamp_Type is new String (Time_Stamp_Index); + -- Type used to represent time stamp + + Empty_Time_Stamp : constant Time_Stamp_Type := (others => ' '); + -- Value representing an empty or missing time stamp. Looks less than any + -- real time stamp if two time stamps are compared. Note that although this + -- is not private, clients should not rely on the exact way in which this + -- string is represented, and instead should use the subprograms below. + + Dummy_Time_Stamp : constant Time_Stamp_Type := (others => '0'); + -- This is used for dummy time stamp values used in the D lines for + -- non-existent files, and is intended to be an impossible value. + + function "=" (Left, Right : Time_Stamp_Type) return Boolean; + function "<=" (Left, Right : Time_Stamp_Type) return Boolean; + function ">=" (Left, Right : Time_Stamp_Type) return Boolean; + function "<" (Left, Right : Time_Stamp_Type) return Boolean; + function ">" (Left, Right : Time_Stamp_Type) return Boolean; + -- Comparison functions on time stamps. Note that two time stamps are + -- defined as being equal if they have the same day/month/year and the + -- hour/minutes/seconds values are within 2 seconds of one another. This + -- deals with rounding effects in library file time stamps caused by + -- copying operations during installation. We have particularly noticed + -- that WinNT seems susceptible to such changes. + -- + -- Note : the Empty_Time_Stamp value looks equal to itself, and less than + -- any non-empty time stamp value. + + procedure Split_Time_Stamp + (TS : Time_Stamp_Type; + Year : out Nat; + Month : out Nat; + Day : out Nat; + Hour : out Nat; + Minutes : out Nat; + Seconds : out Nat); + -- Given a time stamp, decompose it into its components + + procedure Make_Time_Stamp + (Year : Nat; + Month : Nat; + Day : Nat; + Hour : Nat; + Minutes : Nat; + Seconds : Nat; + TS : out Time_Stamp_Type); + -- Given the components of a time stamp, initialize the value + + ------------------------------------- + -- Types used for Check Management -- + ------------------------------------- + + type Check_Id is new Nat; + -- Type used to represent a check id + + No_Check_Id : constant := 0; + -- Check_Id value used to indicate no check + + Access_Check : constant := 1; + Accessibility_Check : constant := 2; + Alignment_Check : constant := 3; + Atomic_Synchronization : constant := 4; + Discriminant_Check : constant := 5; + Division_Check : constant := 6; + Elaboration_Check : constant := 7; + Index_Check : constant := 8; + Length_Check : constant := 9; + Overflow_Check : constant := 10; + Range_Check : constant := 11; + Storage_Check : constant := 12; + Tag_Check : constant := 13; + Validity_Check : constant := 14; + -- Values used to represent individual predefined checks (including the + -- setting of Atomic_Synchronization, which is implemented internally using + -- a "check" whose name is Atomic_Synchronization. + + All_Checks : constant := 15; + -- Value used to represent All_Checks value + + subtype Predefined_Check_Id is Check_Id range 1 .. All_Checks; + -- Subtype for predefined checks, including All_Checks + + -- The following array contains an entry for each recognized check name + -- for pragma Suppress. It is used to represent current settings of scope + -- based suppress actions from pragma Suppress or command line settings. + + -- Note: when Suppress_Array (All_Checks) is True, then generally all other + -- specific check entries are set True, except for the Elaboration_Check + -- entry which is set only if an explicit Suppress for this check is given. + -- The reason for this non-uniformity is that we do not want All_Checks to + -- suppress elaboration checking when using the static elaboration model. + -- We recognize only an explicit suppress of Elaboration_Check as a signal + -- that the static elaboration checking should skip a compile time check. + + type Suppress_Array is array (Predefined_Check_Id) of Boolean; + pragma Pack (Suppress_Array); + + -- To add a new check type to GNAT, the following steps are required: + + -- 1. Add an entry to Snames spec and body for the new name + -- 2. Add an entry to the definition of Check_Id above + -- 3. Add a new function to Checks to handle the new check test + -- 4. Add a new Do_xxx_Check flag to Sinfo (if required) + -- 5. Add appropriate checks for the new test + + -- The following provides precise details on the mode used to generate + -- code for intermediate operations in expressions for signed integer + -- arithmetic (and how to generate overflow checks if enabled). Note + -- that this only affects handling of intermediate results. The final + -- result must always fit within the target range, and if overflow + -- checking is enabled, the check on the final result is against this + -- target range. + + type Overflow_Mode_Type is ( + Not_Set, + -- Dummy value used during initialization process to show that the + -- corresponding value has not yet been initialized. + + Strict, + -- Operations are done in the base type of the subexpression. If + -- overflow checks are enabled, then the check is against the range + -- of this base type. + + Minimized, + -- Where appropriate, intermediate arithmetic operations are performed + -- with an extended range, using Long_Long_Integer if necessary. If + -- overflow checking is enabled, then the check is against the range + -- of Long_Long_Integer. + + Eliminated); + -- In this mode arbitrary precision arithmetic is used as needed to + -- ensure that it is impossible for intermediate arithmetic to cause an + -- overflow. In this mode, intermediate expressions are not affected by + -- the overflow checking mode, since overflows are eliminated. + + subtype Minimized_Or_Eliminated is + Overflow_Mode_Type range Minimized .. Eliminated; + -- Define subtype so that clients don't need to know ordering. Note that + -- Overflow_Mode_Type is not marked as an ordered enumeration type. + + -- The following structure captures the state of check suppression or + -- activation at a particular point in the program execution. + + type Suppress_Record is record + Suppress : Suppress_Array; + -- Indicates suppression status of each possible check + + Overflow_Mode_General : Overflow_Mode_Type; + -- This field indicates the mode for handling code generation and + -- overflow checking (if enabled) for intermediate expression values. + -- This applies to general expressions outside assertions. + + Overflow_Mode_Assertions : Overflow_Mode_Type; + -- This field indicates the mode for handling code generation and + -- overflow checking (if enabled) for intermediate expression values. + -- This applies to any expression occuring inside assertions. + end record; + + ----------------------------------- + -- Global Exception Declarations -- + ----------------------------------- + + -- This section contains declarations of exceptions that are used + -- throughout the compiler or in other GNAT tools. + + Unrecoverable_Error : exception; + -- This exception is raised to immediately terminate the compilation of the + -- current source program. Used in situations where things are bad enough + -- that it doesn't seem worth continuing (e.g. max errors reached, or a + -- required file is not found). Also raised when the compiler finds itself + -- in trouble after an error (see Comperr). + + Terminate_Program : exception; + -- This exception is raised to immediately terminate the tool being + -- executed. Each tool where this exception may be raised must have a + -- single exception handler that contains only a null statement and that is + -- the last statement of the program. If needed, procedure Set_Exit_Status + -- is called with the appropriate exit status before raising + -- Terminate_Program. + + --------------------------------- + -- Parameter Mechanism Control -- + --------------------------------- + + -- Function and parameter entities have a field that records the passing + -- mechanism. See specification of Sem_Mech for full details. The following + -- subtype is used to represent values of this type: + + subtype Mechanism_Type is Int range -18 .. Int'Last; + -- Type used to represent a mechanism value. This is a subtype rather than + -- a type to avoid some annoying processing problems with certain routines + -- in Einfo (processing them to create the corresponding C). + + ------------------------------ + -- Run-Time Exception Codes -- + ------------------------------ + + -- When the code generator generates a run-time exception, it provides a + -- reason code which is one of the following. This reason code is used to + -- select the appropriate run-time routine to be called, determining both + -- the exception to be raised, and the message text to be added. + + -- The prefix CE/PE/SE indicates the exception to be raised + -- CE = Constraint_Error + -- PE = Program_Error + -- SE = Storage_Error + + -- The remaining part of the name indicates the message text to be added, + -- where all letters are lower case, and underscores are converted to + -- spaces (for example CE_Invalid_Data adds the text "invalid data"). + + -- To add a new code, you need to do the following: + + -- 1. Modify the type and subtype declarations below appropriately, + -- keeping things in alphabetical order. + + -- 2. Modify the corresponding definitions in types.h, including the + -- definition of last_reason_code. + + -- 3. Add the name of the routines in exp_ch11.Get_RT_Exception_Name + + -- 4. Add a new routine in Ada.Exceptions with the appropriate call and + -- static string constant. Note that there is more than one version + -- of a-except.adb which must be modified. + + type RT_Exception_Code is + (CE_Access_Check_Failed, -- 00 + CE_Access_Parameter_Is_Null, -- 01 + CE_Discriminant_Check_Failed, -- 02 + CE_Divide_By_Zero, -- 03 + CE_Explicit_Raise, -- 04 + CE_Index_Check_Failed, -- 05 + CE_Invalid_Data, -- 06 + CE_Length_Check_Failed, -- 07 + CE_Null_Exception_Id, -- 08 + CE_Null_Not_Allowed, -- 09 + CE_Overflow_Check_Failed, -- 10 + CE_Partition_Check_Failed, -- 11 + CE_Range_Check_Failed, -- 12 + CE_Tag_Check_Failed, -- 13 + + PE_Access_Before_Elaboration, -- 14 + PE_Accessibility_Check_Failed, -- 15 + PE_Address_Of_Intrinsic, -- 16 + PE_All_Guards_Closed, -- 17 + PE_Bad_Predicated_Generic_Type, -- 18 + PE_Current_Task_In_Entry_Body, -- 19 + PE_Duplicated_Entry_Address, -- 20 + PE_Explicit_Raise, -- 21 + PE_Finalize_Raised_Exception, -- 22 + PE_Implicit_Return, -- 23 + PE_Misaligned_Address_Value, -- 24 + PE_Missing_Return, -- 25 + PE_Overlaid_Controlled_Object, -- 26 + PE_Potentially_Blocking_Operation, -- 27 + PE_Stubbed_Subprogram_Called, -- 28 + PE_Unchecked_Union_Restriction, -- 29 + PE_Non_Transportable_Actual, -- 30 + + SE_Empty_Storage_Pool, -- 31 + SE_Explicit_Raise, -- 32 + SE_Infinite_Recursion, -- 33 + SE_Object_Too_Large); -- 34 + + subtype RT_CE_Exceptions is RT_Exception_Code range + CE_Access_Check_Failed .. + CE_Tag_Check_Failed; + + subtype RT_PE_Exceptions is RT_Exception_Code range + PE_Access_Before_Elaboration .. + PE_Non_Transportable_Actual; + + subtype RT_SE_Exceptions is RT_Exception_Code range + SE_Empty_Storage_Pool .. + SE_Object_Too_Large; + +end Types; |