| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT COMPILER COMPONENTS -- |
| -- -- |
| -- N A M E T -- |
| -- -- |
| -- S p e c -- |
| -- -- |
| -- Copyright (C) 1992-2022, 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. -- |
| -- -- |
| ------------------------------------------------------------------------------ |
| |
| with Alloc; |
| with Hostparm; use Hostparm; |
| with Table; |
| with Types; use Types; |
| |
| package Namet is |
| |
| -- WARNING: There is a C version of this package. Any changes to this |
| -- source file must be properly reflected in the C header file namet.h |
| |
| -- This package contains routines for handling the names table. The table |
| -- is used to store character strings for identifiers and operator symbols, |
| -- as well as other string values such as unit names and file names. |
| |
| -- The forms of the entries are as follows: |
| |
| -- Identifiers Stored with upper case letters folded to lower case. |
| -- Upper half (16#80# bit set) and wide characters are |
| -- stored in an encoded form (Uhh for upper half char, |
| -- Whhhh for wide characters, WWhhhhhhhh as provided by |
| -- the routine Append_Encoded, where hh are hex |
| -- digits for the character code using lower case a-f). |
| -- Normally the use of U or W in other internal names is |
| -- avoided, but these letters may be used in internal |
| -- names (without this special meaning), if they appear |
| -- as the last character of the name, or they are |
| -- followed by an upper case letter (other than the WW |
| -- sequence), or an underscore. |
| |
| -- Operator symbols Stored with an initial letter O, and the remainder |
| -- of the name is the lower case characters XXX where |
| -- the name is Name_Op_XXX, see Snames spec for a full |
| -- list of the operator names. Normally the use of O |
| -- in other internal names is avoided, but it may be |
| -- used in internal names (without this special meaning) |
| -- if it is the last character of the name, or if it is |
| -- followed by an upper case letter or an underscore. |
| |
| -- Character literals Character literals have names that are used only for |
| -- debugging and error message purposes. The form is an |
| -- upper case Q followed by a single lower case letter, |
| -- or by a Uxx/Wxxxx/WWxxxxxxx encoding as described for |
| -- identifiers. The Set_Character_Literal_Name procedure |
| -- should be used to construct these encodings. Normally |
| -- the use of O in other internal names is avoided, but |
| -- it may be used in internal names (without this special |
| -- meaning) if it is the last character of the name, or |
| -- if it is followed by an upper case letter or an |
| -- underscore. |
| |
| -- Unit names Stored with upper case letters folded to lower case, |
| -- using Uhh/Whhhh/WWhhhhhhhh encoding as described for |
| -- identifiers, and a %s or %b suffix for specs/bodies. |
| -- See package Uname for further details. |
| |
| -- File names Are stored in the form provided by Osint. Typically |
| -- they may include wide character escape sequences and |
| -- upper case characters (in non-encoded form). Casing |
| -- is also derived from the external environment. Note |
| -- that file names provided by Osint must generally be |
| -- consistent with the names from Fname.Get_File_Name. |
| |
| -- Other strings The names table is also used as a convenient storage |
| -- location for other variable length strings such as |
| -- error messages etc. There are no restrictions on what |
| -- characters may appear for such entries. |
| |
| -- Note: the encodings Uhh (upper half characters), Whhhh (wide characters), |
| -- WWhhhhhhhh (wide wide characters) and Qx (character literal names) are |
| -- described in the spec, since they are visible throughout the system (e.g. |
| -- in debugging output). However, no code should depend on these particular |
| -- encodings, so it should be possible to change the encodings by making |
| -- changes only to the Namet specification (to change these comments) and the |
| -- body (which actually implements the encodings). |
| |
| -- The names are hashed so that a given name appears only once in the table, |
| -- except that names entered with Name_Enter as opposed to Name_Find are |
| -- omitted from the hash table. |
| |
| -- The first 26 entries in the names table (with Name_Id values in the range |
| -- First_Name_Id .. First_Name_Id + 25) represent names which are the one |
| -- character lower case letters in the range a-z, and these names are created |
| -- and initialized by the Initialize procedure. |
| |
| -- Five values, one of type Int, one of type Byte, and three of type Boolean, |
| -- are stored with each names table entry and subprograms are provided for |
| -- setting and retrieving these associated values. The usage of these values |
| -- is up to the client: |
| |
| -- In the compiler we have the following uses: |
| |
| -- The Int field is used to point to a chain of potentially visible |
| -- entities (see Sem.Ch8 for details). |
| |
| -- The Byte field is used to hold the Token_Type value for reserved words |
| -- (see Sem for details). |
| |
| -- The Boolean1 field is used to mark address clauses to optimize the |
| -- performance of the Exp_Util.Following_Address_Clause function. |
| |
| -- The Boolean2 field is used to mark simple names that appear in |
| -- Restriction[_Warning]s pragmas for No_Use_Of_Entity. This avoids most |
| -- unnecessary searches of the No_Use_Of_Entity table. |
| |
| -- The Boolean3 field is set for names of pragmas that are to be ignored |
| -- because of the occurrence of a corresponding pragma Ignore_Pragma. |
| |
| -- In the binder, we have the following uses: |
| |
| -- The Int field is used in various ways depending on the name involved, |
| -- see binder documentation for details. |
| |
| -- The Byte and Boolean fields are unused. |
| |
| -- Note that the value of the Int and Byte fields are initialized to zero, |
| -- and the Boolean field is initialized to False, when a new Name table entry |
| -- is created. |
| |
| type Bounded_String (Max_Length : Natural := 2**12) is limited |
| -- It's unlikely to have names longer than this. But we don't want to make |
| -- it too big, because we declare these on the stack in recursive routines. |
| record |
| Length : Natural := 0; |
| Chars : String (1 .. Max_Length); |
| end record; |
| |
| -- To create a Name_Id, you can declare a Bounded_String as a local |
| -- variable, and Append things onto it, and finally call Name_Find. |
| -- You can also use a String, as in: |
| -- X := Name_Find (Some_String & "_some_suffix"); |
| |
| -- For historical reasons, we also have the Global_Name_Buffer below, |
| -- which is used by most of the code via the renamings. New code ought |
| -- to avoid the global. |
| |
| Global_Name_Buffer : Bounded_String (Max_Length => 4 * Max_Line_Length); |
| Name_Buffer : String renames Global_Name_Buffer.Chars; |
| Name_Len : Natural renames Global_Name_Buffer.Length; |
| |
| -- Note that there is some circuitry (e.g. Osint.Write_Program_Name) that |
| -- does a save/restore on Name_Len and Name_Buffer (1 .. Name_Len). This |
| -- works in part because Name_Len is default-initialized to 0. |
| |
| ----------------------------- |
| -- Types for Namet Package -- |
| ----------------------------- |
| |
| -- Name_Id values are used to identify entries in the names table. Except |
| -- for the special values No_Name and Error_Name, they are subscript values |
| -- for the Names table defined in this package. |
| |
| -- Note that with only a few exceptions, which are clearly documented, the |
| -- type Name_Id should be regarded as a private type. In particular it is |
| -- never appropriate to perform arithmetic operations using this type. |
| |
| type Name_Id is range Names_Low_Bound .. Names_High_Bound; |
| for Name_Id'Size use 32; |
| -- Type used to identify entries in the names table |
| |
| No_Name : constant Name_Id := Names_Low_Bound; |
| -- The special Name_Id value No_Name is used in the parser to indicate |
| -- a situation where no name is present (e.g. on a loop or block). |
| |
| Error_Name : constant Name_Id := Names_Low_Bound + 1; |
| -- The special Name_Id value Error_Name is used in the parser to |
| -- indicate that some kind of error was encountered in scanning out |
| -- the relevant name, so it does not have a representable label. |
| |
| First_Name_Id : constant Name_Id := Names_Low_Bound + 2; |
| -- Subscript of first entry in names table |
| |
| subtype Valid_Name_Id is Name_Id range First_Name_Id .. Name_Id'Last; |
| -- All but No_Name and Error_Name |
| |
| function Present (Nam : Name_Id) return Boolean; |
| pragma Inline (Present); |
| -- Determine whether name Nam exists |
| |
| ----------------- |
| -- Subprograms -- |
| ----------------- |
| |
| function To_String (Buf : Bounded_String) return String; |
| pragma Inline (To_String); |
| function "+" (Buf : Bounded_String) return String renames To_String; |
| |
| function Name_Find |
| (Buf : Bounded_String := Global_Name_Buffer) return Valid_Name_Id; |
| function Name_Find (S : String) return Valid_Name_Id; |
| -- Name_Find searches the names table to see if the string has already been |
| -- stored. If so, the Id of the existing entry is returned. Otherwise a new |
| -- entry is created with its Name_Table_Int fields set to zero/false. Note |
| -- that it is permissible for Buf.Length to be zero to lookup the empty |
| -- name string. |
| |
| function Name_Enter |
| (Buf : Bounded_String := Global_Name_Buffer) return Valid_Name_Id; |
| function Name_Enter (S : String) return Valid_Name_Id; |
| -- Name_Enter is similar to Name_Find. The difference is that it does not |
| -- search the table for an existing match, and also subsequent Name_Find |
| -- calls using the same name will not locate the entry created by this |
| -- call. Thus multiple calls to Name_Enter with the same name will create |
| -- multiple entries in the name table with different Name_Id values. This |
| -- is useful in the case of created names, which are never expected to be |
| -- looked up. Note: Name_Enter should never be used for one character |
| -- names, since these are efficiently located without hashing by Name_Find |
| -- in any case. |
| |
| function Name_Equals |
| (N1 : Valid_Name_Id; |
| N2 : Valid_Name_Id) return Boolean; |
| -- Return whether N1 and N2 denote the same character sequence |
| |
| function Get_Name_String (Id : Valid_Name_Id) return String; |
| -- Returns the characters of Id as a String. The lower bound is 1. |
| |
| -- The following Append procedures ignore any characters that don't fit in |
| -- Buf. |
| |
| procedure Append (Buf : in out Bounded_String; C : Character); |
| -- Append C onto Buf |
| pragma Inline (Append); |
| |
| procedure Append (Buf : in out Bounded_String; V : Nat); |
| -- Append decimal representation of V onto Buf |
| |
| procedure Append (Buf : in out Bounded_String; S : String); |
| -- Append S onto Buf |
| |
| procedure Append (Buf : in out Bounded_String; Buf2 : Bounded_String); |
| -- Append Buf2 onto Buf |
| |
| procedure Append (Buf : in out Bounded_String; Id : Valid_Name_Id); |
| -- Append the characters of Id onto Buf. It is an error to call this with |
| -- one of the special name Id values (No_Name or Error_Name). |
| |
| procedure Append_Decoded (Buf : in out Bounded_String; Id : Valid_Name_Id); |
| -- Same as Append, except that the result is decoded, so that upper half |
| -- characters and wide characters appear as originally found in the source |
| -- program text, operators have their source forms (special characters and |
| -- enclosed in quotes), and character literals appear surrounded by |
| -- apostrophes. |
| |
| procedure Append_Decoded_With_Brackets |
| (Buf : in out Bounded_String; |
| Id : Valid_Name_Id); |
| -- Same as Append_Decoded, except that the brackets notation (Uhh |
| -- replaced by ["hh"], Whhhh replaced by ["hhhh"], WWhhhhhhhh replaced by |
| -- ["hhhhhhhh"]) is used for all non-lower half characters, regardless of |
| -- how Opt.Wide_Character_Encoding_Method is set, and also in that |
| -- characters in the range 16#80# .. 16#FF# are converted to brackets |
| -- notation in all cases. This routine can be used when there is a |
| -- requirement for a canonical representation not affected by the |
| -- character set options (e.g. in the binder generation of symbols). |
| |
| procedure Append_Unqualified |
| (Buf : in out Bounded_String; Id : Valid_Name_Id); |
| -- Same as Append, except that qualification (as defined in unit |
| -- Exp_Dbug) is removed (including both preceding __ delimited names, and |
| -- also the suffixes used to indicate package body entities and to |
| -- distinguish between overloaded entities). Note that names are not |
| -- qualified until just before the call to gigi, so this routine is only |
| -- needed by processing that occurs after gigi has been called. |
| |
| procedure Append_Unqualified_Decoded |
| (Buf : in out Bounded_String; |
| Id : Valid_Name_Id); |
| -- Same as Append_Unqualified, but decoded as for Append_Decoded |
| |
| procedure Append_Encoded (Buf : in out Bounded_String; C : Char_Code); |
| -- Appends given character code at the end of Buf. Lower case letters and |
| -- digits are stored unchanged. Other 8-bit characters are stored using the |
| -- Uhh encoding (hh = hex code), other 16-bit wide character values are |
| -- stored using the Whhhh (hhhh = hex code) encoding, and other 32-bit wide |
| -- wide character values are stored using the WWhhhhhhhh (hhhhhhhh = hex |
| -- code). Note that this procedure does not fold upper case letters (they |
| -- are stored using the Uhh encoding). |
| |
| procedure Set_Character_Literal_Name |
| (Buf : in out Bounded_String; |
| C : Char_Code); |
| -- This procedure sets the proper encoded name for the character literal |
| -- for the given character code. |
| |
| procedure Insert_Str |
| (Buf : in out Bounded_String; |
| S : String; |
| Index : Positive); |
| -- Inserts S in Buf, starting at Index. Any existing characters at or past |
| -- this location get moved beyond the inserted string. |
| |
| function Is_Internal_Name (Buf : Bounded_String) return Boolean; |
| |
| procedure Get_Last_Two_Chars |
| (N : Valid_Name_Id; |
| C1 : out Character; |
| C2 : out Character); |
| -- Obtains last two characters of a name. C1 is last but one character and |
| -- C2 is last character. If name is less than two characters long then both |
| -- C1 and C2 are set to ASCII.NUL on return. |
| |
| function Get_Name_Table_Boolean1 (Id : Valid_Name_Id) return Boolean; |
| function Get_Name_Table_Boolean2 (Id : Valid_Name_Id) return Boolean; |
| function Get_Name_Table_Boolean3 (Id : Valid_Name_Id) return Boolean; |
| -- Fetches the Boolean values associated with the given name |
| |
| function Get_Name_Table_Byte (Id : Valid_Name_Id) return Byte; |
| pragma Inline (Get_Name_Table_Byte); |
| -- Fetches the Byte value associated with the given name |
| |
| function Get_Name_Table_Int (Id : Valid_Name_Id) return Int; |
| pragma Inline (Get_Name_Table_Int); |
| -- Fetches the Int value associated with the given name |
| |
| procedure Set_Name_Table_Boolean1 (Id : Valid_Name_Id; Val : Boolean); |
| procedure Set_Name_Table_Boolean2 (Id : Valid_Name_Id; Val : Boolean); |
| procedure Set_Name_Table_Boolean3 (Id : Valid_Name_Id; Val : Boolean); |
| -- Sets the Boolean value associated with the given name |
| |
| procedure Set_Name_Table_Byte (Id : Valid_Name_Id; Val : Byte); |
| pragma Inline (Set_Name_Table_Byte); |
| -- Sets the Byte value associated with the given name |
| |
| procedure Set_Name_Table_Int (Id : Valid_Name_Id; Val : Int); |
| pragma Inline (Set_Name_Table_Int); |
| -- Sets the Int value associated with the given name |
| |
| function Is_Internal_Name (Id : Valid_Name_Id) return Boolean; |
| -- Returns True if the name is an internal name, i.e. contains a character |
| -- for which Is_OK_Internal_Letter is true, or if the name starts or ends |
| -- with an underscore. |
| -- |
| -- Note: if the name is qualified (has a double underscore), then only the |
| -- final entity name is considered, not the qualifying names. Consider for |
| -- example that the name: |
| -- |
| -- pkg__B_1__xyz |
| -- |
| -- is not an internal name, because the B comes from the internal name of |
| -- a qualifying block, but the xyz means that this was indeed a declared |
| -- identifier called "xyz" within this block and there is nothing internal |
| -- about that name. |
| |
| function Is_OK_Internal_Letter (C : Character) return Boolean; |
| pragma Inline (Is_OK_Internal_Letter); |
| -- Returns true if C is a suitable character for using as a prefix or a |
| -- suffix of an internally generated name, i.e. it is an upper case letter |
| -- other than one of the ones used for encoding source names (currently the |
| -- set of reserved letters is O, Q, U, W) and also returns False for the |
| -- letter X, which is reserved for debug output (see Exp_Dbug). |
| |
| function Is_Operator_Name (Id : Valid_Name_Id) return Boolean; |
| -- Returns True if name given is of the form of an operator (that is, it |
| -- starts with an upper case O). |
| |
| function Is_Valid_Name (Id : Name_Id) return Boolean; |
| -- True if Id is a valid name - points to a valid entry in the Name_Entries |
| -- table. |
| |
| function Length_Of_Name (Id : Valid_Name_Id) return Nat; |
| pragma Inline (Length_Of_Name); |
| -- Returns length of given name in characters. This is the length of the |
| -- encoded name, as stored in the names table. |
| |
| procedure Initialize; |
| -- This is a dummy procedure. It is retained for easy compatibility with |
| -- clients who used to call Initialize when this call was required. Now |
| -- initialization is performed automatically during package elaboration. |
| -- Note that this change fixes problems which existed prior to the change |
| -- of Initialize being called more than once. See also Reinitialize which |
| -- allows reinitialization of the tables. |
| |
| procedure Reinitialize; |
| -- Clears the name tables and removes all existing entries from the table. |
| |
| procedure Reset_Name_Table; |
| -- This procedure is used when there are multiple source files to reset the |
| -- name table info entries associated with current entries in the names |
| -- table. There is no harm in keeping the names entries themselves from one |
| -- compilation to another, but we can't keep the entity info, since this |
| -- refers to tree nodes, which are destroyed between each main source file. |
| |
| procedure Finalize; |
| -- Called at the end of a use of the Namet package (before a subsequent |
| -- call to Initialize). Currently this routine is only used to generate |
| -- debugging output. |
| |
| procedure Lock; |
| -- Lock name tables before calling back end. We reserve some extra space |
| -- before locking to avoid unnecessary inefficiencies when we unlock. |
| |
| procedure Unlock; |
| -- Unlocks the name table to allow use of the extra space reserved by the |
| -- call to Lock. See gnat1drv for details of the need for this. |
| |
| procedure Write_Name (Id : Valid_Name_Id); |
| -- Write_Name writes the characters of the specified name using the |
| -- standard output procedures in package Output. The name is written |
| -- in encoded form (i.e. including Uhh, Whhh, Qx, _op as they appear in |
| -- the name table). If Id is Error_Name, or No_Name, no text is output. |
| |
| procedure Write_Name_Decoded (Id : Valid_Name_Id); |
| -- Like Write_Name, except that the name written is the decoded name, as |
| -- described for Append_Decoded. |
| |
| function Name_Entries_Count return Nat; |
| -- Return current number of entries in the names table |
| |
| function Last_Name_Id return Name_Id; |
| -- Return the last Name_Id in the table. This information is valid until |
| -- new names have been added. |
| |
| -------------------------- |
| -- Obsolete Subprograms -- |
| -------------------------- |
| |
| -- The following routines operate on Global_Name_Buffer. New code should |
| -- use the routines above, and declare Bounded_Strings as local |
| -- variables. Existing code can be improved incrementally by removing calls |
| -- to the following. If we eliminate all of these, we can remove |
| -- Global_Name_Buffer. But be sure to look at namet.h first. |
| |
| -- To see what these do, look at the bodies. They are all trivially defined |
| -- in terms of routines above. |
| |
| procedure Add_Char_To_Name_Buffer (C : Character); |
| pragma Inline (Add_Char_To_Name_Buffer); |
| |
| procedure Add_Nat_To_Name_Buffer (V : Nat); |
| |
| procedure Add_Str_To_Name_Buffer (S : String); |
| |
| procedure Get_Decoded_Name_String (Id : Valid_Name_Id); |
| |
| procedure Get_Decoded_Name_String_With_Brackets (Id : Valid_Name_Id); |
| |
| procedure Get_Name_String (Id : Valid_Name_Id); |
| |
| procedure Get_Name_String_And_Append (Id : Valid_Name_Id); |
| |
| procedure Get_Unqualified_Decoded_Name_String (Id : Valid_Name_Id); |
| |
| procedure Get_Unqualified_Name_String (Id : Valid_Name_Id); |
| |
| procedure Insert_Str_In_Name_Buffer (S : String; Index : Positive); |
| |
| function Is_Internal_Name return Boolean; |
| |
| procedure Set_Character_Literal_Name (C : Char_Code); |
| |
| procedure Store_Encoded_Character (C : Char_Code); |
| |
| ------------------------------ |
| -- File and Unit Name Types -- |
| ------------------------------ |
| |
| -- These are defined here in Namet rather than Fname and Uname to avoid |
| -- problems with dependencies, and to avoid dragging in Fname and Uname |
| -- into many more files, but it would be cleaner to move to Fname/Uname. |
| |
| type File_Name_Type is new Name_Id; |
| -- File names are stored in the names table and this type is used to |
| -- indicate that a Name_Id value is being used to hold a simple file name |
| -- (which does not include any directory information). |
| |
| No_File : constant File_Name_Type := File_Name_Type (No_Name); |
| -- Constant used to indicate no file is present (this is used for example |
| -- when a search for a file indicates that no file of the name exists). |
| |
| function Present (Nam : File_Name_Type) return Boolean; |
| pragma Inline (Present); |
| -- Determine whether file name Nam exists |
| |
| Error_File_Name : constant File_Name_Type := File_Name_Type (Error_Name); |
| -- The special File_Name_Type value Error_File_Name is used to indicate |
| -- a unit name where some previous processing has found an error. |
| |
| subtype Error_File_Name_Or_No_File is |
| File_Name_Type range No_File .. Error_File_Name; |
| -- Used to test for either error file name or no file |
| |
| type Path_Name_Type is new Name_Id; |
| -- Path names are stored in the names table and this type is used to |
| -- indicate that a Name_Id value is being used to hold a path name (that |
| -- may contain directory information). |
| |
| No_Path : constant Path_Name_Type := Path_Name_Type (No_Name); |
| -- Constant used to indicate no path name is present |
| |
| type Unit_Name_Type is new Name_Id; |
| -- Unit names are stored in the names table and this type is used to |
| -- indicate that a Name_Id value is being used to hold a unit name, which |
| -- terminates in %b for a body or %s for a spec. |
| |
| No_Unit_Name : constant Unit_Name_Type := Unit_Name_Type (No_Name); |
| -- Constant used to indicate no file name present |
| |
| function Present (Nam : Unit_Name_Type) return Boolean; |
| pragma Inline (Present); |
| -- Determine whether unit name Nam exists |
| |
| Error_Unit_Name : constant Unit_Name_Type := Unit_Name_Type (Error_Name); |
| -- The special Unit_Name_Type value Error_Unit_Name is used to indicate |
| -- a unit name where some previous processing has found an error. |
| |
| subtype Error_Unit_Name_Or_No_Unit_Name is |
| Unit_Name_Type range No_Unit_Name .. Error_Unit_Name; |
| |
| ------------------------ |
| -- Debugging Routines -- |
| ------------------------ |
| |
| procedure wn (Id : Name_Id); |
| pragma Export (Ada, wn); |
| -- This routine is intended for debugging use only (i.e. it is intended to |
| -- be called from the debugger). It writes the characters of the specified |
| -- name using the standard output procedures in package Output, followed by |
| -- a new line. The name is written in encoded form (i.e. including Uhh, |
| -- Whhh, Qx, _op as they appear in the name table). If Id is Error_Name, |
| -- No_Name, or invalid an appropriate string is written (<Error_Name>, |
| -- <No_Name>, <invalid name>). Unlike Write_Name, this call does not affect |
| -- the contents of Name_Buffer or Name_Len. |
| |
| private |
| |
| --------------------------- |
| -- Table Data Structures -- |
| --------------------------- |
| |
| -- The following declarations define the data structures used to store |
| -- names. The definitions are in the private part of the package spec, |
| -- rather than the body, since they are referenced directly by gigi. |
| |
| -- This table stores the actual string names. Although logically there is |
| -- no need for a terminating character (since the length is stored in the |
| -- name entry table), we still store a NUL character at the end of every |
| -- name (for convenience in interfacing to the C world). |
| |
| package Name_Chars is new Table.Table ( |
| Table_Component_Type => Character, |
| Table_Index_Type => Int, |
| Table_Low_Bound => 0, |
| Table_Initial => Alloc.Name_Chars_Initial, |
| Table_Increment => Alloc.Name_Chars_Increment, |
| Table_Name => "Name_Chars"); |
| |
| type Name_Entry is record |
| Name_Chars_Index : aliased Int; |
| -- Starting location of characters in the Name_Chars table minus one |
| -- (i.e. pointer to character just before first character). The reason |
| -- for the bias of one is that indexes in Name_Buffer are one's origin, |
| -- so this avoids unnecessary adds and subtracts of 1. |
| |
| Name_Len : aliased Short; |
| -- Length of this name in characters |
| |
| Byte_Info : aliased Byte; |
| -- Byte value associated with this name |
| |
| Name_Has_No_Encodings : Boolean; |
| -- This flag is set True if the name entry is known not to contain any |
| -- special character encodings. This is used to speed up repeated calls |
| -- to Append_Decoded. A value of False means that it is not known |
| -- whether the name contains any such encodings. |
| |
| Boolean1_Info : Boolean; |
| Boolean2_Info : Boolean; |
| Boolean3_Info : Boolean; |
| -- Boolean values associated with the name |
| |
| Spare : Boolean; |
| -- Four remaining bits in the current byte |
| |
| Hash_Link : aliased Name_Id; |
| -- Link to next entry in names table for same hash code |
| |
| Int_Info : aliased Int; |
| -- Int Value associated with this name |
| |
| end record; |
| |
| for Name_Entry use record |
| Name_Chars_Index at 0 range 0 .. 31; |
| Name_Len at 4 range 0 .. 15; |
| Byte_Info at 6 range 0 .. 7; |
| Name_Has_No_Encodings at 7 range 0 .. 0; |
| Boolean1_Info at 7 range 1 .. 1; |
| Boolean2_Info at 7 range 2 .. 2; |
| Boolean3_Info at 7 range 3 .. 3; |
| Spare at 7 range 4 .. 7; |
| Hash_Link at 8 range 0 .. 31; |
| Int_Info at 12 range 0 .. 31; |
| end record; |
| |
| for Name_Entry'Size use 16 * 8; |
| -- This ensures that we did not leave out any fields |
| |
| -- This is the table that is referenced by Valid_Name_Id entries. |
| -- It contains one entry for each unique name in the table. |
| |
| package Name_Entries is new Table.Table ( |
| Table_Component_Type => Name_Entry, |
| Table_Index_Type => Valid_Name_Id'Base, |
| Table_Low_Bound => First_Name_Id, |
| Table_Initial => Alloc.Names_Initial, |
| Table_Increment => Alloc.Names_Increment, |
| Table_Name => "Name_Entries"); |
| |
| end Namet; |
