diff options
Diffstat (limited to 'gcc-4.2.1/gcc/ada/namet.ads')
| -rw-r--r-- | gcc-4.2.1/gcc/ada/namet.ads | 425 |
1 files changed, 0 insertions, 425 deletions
diff --git a/gcc-4.2.1/gcc/ada/namet.ads b/gcc-4.2.1/gcc/ada/namet.ads deleted file mode 100644 index 4bf12e6a8..000000000 --- a/gcc-4.2.1/gcc/ada/namet.ads +++ /dev/null @@ -1,425 +0,0 @@ ------------------------------------------------------------------------------- --- -- --- GNAT COMPILER COMPONENTS -- --- -- --- N A M E T -- --- -- --- S p e c -- --- -- --- Copyright (C) 1992-2005 Free Software Foundation, Inc. -- --- -- --- GNAT is free software; you can redistribute it and/or modify it under -- --- terms of the GNU General Public License as published by the Free Soft- -- --- ware Foundation; either version 2, or (at your option) any later ver- -- --- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- --- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- --- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -- --- for more details. You should have received a copy of the GNU General -- --- Public License distributed with GNAT; see file COPYING. If not, write -- --- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, -- --- Boston, MA 02110-1301, USA. -- --- -- --- As a special exception, if other files instantiate generics from this -- --- unit, or you link this unit with other files to produce an executable, -- --- this unit does not by itself cause the resulting executable to be -- --- covered by the GNU General Public License. This exception does not -- --- however invalidate any other reasons why the executable file might be -- --- covered by the GNU Public License. -- --- -- --- GNAT was originally developed by the GNAT team at New York University. -- --- Extensive contributions were provided by Ada Core Technologies Inc. -- --- -- ------------------------------------------------------------------------------- - -with Alloc; -with Table; -with Hostparm; use Hostparm; -with System; use System; -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 --- which is created manually from namet.ads and namet.adb. - --- 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 Store_Encoded_Character, 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 a --- 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. - --- Two values, one of type Int and one of type Byte, 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, the Int field is used to point to a chain of potentially --- visible entities (see Sem.Ch8 for details), and the Byte field is used to --- hold the Token_Type value for reserved words (see Sem for details). In the --- binder, the Byte field is unused, and the Int field is used in various --- ways depending on the name involved (see binder documentation). - - Name_Buffer : String (1 .. 4 * Max_Line_Length); - -- This buffer is used to set the name to be stored in the table for the - -- Name_Find call, and to retrieve the name for the Get_Name_String call. - -- The limit here is intended to be an infinite value that ensures that we - -- never overflow the buffer (names this long are too absurd to worry!) - - Name_Len : Natural; - -- Length of name stored in Name_Buffer. Used as an input parameter for - -- Name_Find, and as an output value by Get_Name_String, or Write_Name. - - ----------------- - -- Subprograms -- - ----------------- - - 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 Get_Name_String (Id : Name_Id); - -- Get_Name_String is used to retrieve the string associated with an entry - -- in the names table. The resulting string is stored in Name_Buffer and - -- Name_Len is set. It is an error to call Get_Name_String with one of the - -- special name Id values (No_Name or Error_Name). - - function Get_Name_String (Id : Name_Id) return String; - -- This functional form returns the result as a string without affecting - -- the contents of either Name_Buffer or Name_Len. - - procedure Get_Unqualified_Name_String (Id : Name_Id); - -- Similar to the above 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. This - -- includes all ASIS processing, since ASIS works on the tree written - -- after gigi has been called. - - procedure Get_Name_String_And_Append (Id : Name_Id); - -- Like Get_Name_String but the resulting characters are appended to the - -- current contents of the entry stored in Name_Buffer, and Name_Len is - -- incremented to include the added characters. - - procedure Get_Decoded_Name_String (Id : Name_Id); - -- Same calling sequence an interface as Get_Name_String, 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 Get_Unqualified_Decoded_Name_String (Id : Name_Id); - -- Similar to the above except that qualification (as defined in unit - -- Exp_Dbug) is removed (including both preceding __ delimited names, and - -- also the suffix used to indicate package body 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. This includes all ASIS processing, since ASIS works on the tree - -- written after gigi has been called. - - procedure Get_Decoded_Name_String_With_Brackets (Id : Name_Id); - -- This routine is similar to Decoded_Name, 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). - - function Get_Name_Table_Byte (Id : Name_Id) return Byte; - pragma Inline (Get_Name_Table_Byte); - -- Fetches the Byte value associated with the given name - - function Get_Name_Table_Info (Id : Name_Id) return Int; - pragma Inline (Get_Name_Table_Info); - -- Fetches the Int value associated with the given name - - function Is_Operator_Name (Id : 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). - - procedure Initialize; - -- Initializes the names table, including initializing the first 26 - -- entries in the table (for the 1-character lower case names a-z) Note - -- that Initialize must not be called if Tree_Read is used. - - procedure Lock; - -- Lock name table before calling back end. Space for up to 10 extra - -- names and 1000 extra characters is reserved before the table is locked. - - procedure Unlock; - -- Unlocks the name table to allow use of the 10 extra names and 1000 - -- extra characters reserved by the Lock call. See gnat1drv for details of - -- the need for this. - - function Length_Of_Name (Id : 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, the result is equivalent to - -- calling Get_Name_String and reading Name_Len, except that a call to - -- Length_Of_Name does not affect the contents of Name_Len and Name_Buffer. - - function Name_Chars_Address return System.Address; - -- Return starting address of name characters table (used in Back_End call - -- to Gigi). - - function Name_Find return Name_Id; - -- Name_Find is called with a string stored in Name_Buffer whose length is - -- in Name_Len (i.e. the characters of the name are in subscript positions - -- 1 to Name_Len in Name_Buffer). It 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_Info - -- field set to zero. The contents of Name_Buffer and Name_Len are not - -- modified by this call. Note that it is permissible for Name_Len to be - -- set to zero to lookup the null name string. - - function Name_Enter return Name_Id; - -- Name_Enter has the same calling interface as 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_Entries_Address return System.Address; - -- Return starting address of Names table (used in Back_End call to Gigi) - - function Name_Entries_Count return Nat; - -- Return current number of entries in the names table - - 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_Internal_Name (Id : 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. This call destroys the value of Name_Len and - -- Name_Buffer (it loads these as for Get_Name_String). - -- - -- 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_Internal_Name return Boolean; - -- Like the form with an Id argument, except that the name to be tested is - -- passed in Name_Buffer and Name_Len (which are not affected by the call). - -- Name_Buffer (it loads these as for Get_Name_String). - - 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 Add_Char_To_Name_Buffer (C : Character); - pragma Inline (Add_Char_To_Name_Buffer); - -- Add given character to the end of the string currently stored in the - -- Name_Buffer, incrementing Name_Len. - - procedure Add_Nat_To_Name_Buffer (V : Nat); - -- Add decimal representation of given value to the end of the string - -- currently stored in Name_Buffer, incrementing Name_Len as required. - - procedure Add_Str_To_Name_Buffer (S : String); - -- Add characters of string S to the end of the string currently stored - -- in the Name_Buffer, incrementing Name_Len by the length of the string. - - procedure Set_Character_Literal_Name (C : Char_Code); - -- This procedure sets the proper encoded name for the character literal - -- for the given character code. On return Name_Buffer and Name_Len are - -- set to reflect the stored name. - - procedure Set_Name_Table_Info (Id : Name_Id; Val : Int); - pragma Inline (Set_Name_Table_Info); - -- Sets the Int value associated with the given name - - procedure Set_Name_Table_Byte (Id : Name_Id; Val : Byte); - pragma Inline (Set_Name_Table_Byte); - -- Sets the Byte value associated with the given name - - procedure Store_Encoded_Character (C : Char_Code); - -- Stores given character code at the end of Name_Buffer, updating the - -- value in Name_Len appropriately. 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). If folding is required, it must be done - -- by the caller prior to the call. - - procedure Tree_Read; - -- Initializes internal tables from current tree file using the relevant - -- Table.Tree_Read routines. Note that Initialize should not be called if - -- Tree_Read is used. Tree_Read includes all necessary initialization. - - procedure Tree_Write; - -- Writes out internal tables to current tree file using the relevant - -- Table.Tree_Write routines. - - procedure Get_Last_Two_Chars (N : Name_Id; C1, 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. - - procedure Write_Name (Id : Name_Id); - -- Write_Name writes the characters of the specified name using the - -- standard output procedures in package Output. No end of line is - -- written, just the characters of the name. On return Name_Buffer and - -- Name_Len are set as for a call to Get_Name_String. 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 wn (Id : Name_Id); - pragma Export (Ada, wn); - -- Like Write_Name, but includes new line at end. Intended for use - -- from the debugger only. - - procedure Write_Name_Decoded (Id : Name_Id); - -- Like Write_Name, except that the name written is the decoded name, as - -- described for Get_Decoded_Name_String, and the resulting value stored - -- in Name_Len and Name_Buffer is the decoded name. - - --------------------------- - -- 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. - -private - - -- 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 : 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 : Short; - -- Length of this name in characters - - Byte_Info : Byte; - -- Byte value associated with this name - - Hash_Link : Name_Id; - -- Link to next entry in names table for same hash code - - Int_Info : Int; - -- Int Value associated with this name - end record; - - -- This is the table that is referenced by 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 => Name_Id, - Table_Low_Bound => First_Name_Id, - Table_Initial => Alloc.Names_Initial, - Table_Increment => Alloc.Names_Increment, - Table_Name => "Name_Entries"); - -end Namet; |