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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- O S I N T --
-- --
-- S p e c --
-- --
-- Copyright (C) 1992-2013, 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 contains the low level, operating system routines used in the
-- compiler and binder for command line processing and file input output.
with Namet; use Namet;
with Types; use Types;
with System; use System;
pragma Warnings (Off);
-- This package is used also by gnatcoll
with System.OS_Lib; use System.OS_Lib;
pragma Warnings (On);
with System.Storage_Elements;
pragma Elaborate_All (System.OS_Lib);
-- For the call to function Get_Target_Object_Suffix in the private part
package Osint is
Multi_Unit_Index_Character : Character := '~';
-- The character before the index of the unit in a multi-unit source in ALI
-- and object file names. Changed to '$' on VMS.
Ada_Include_Path : constant String := "ADA_INCLUDE_PATH";
Ada_Objects_Path : constant String := "ADA_OBJECTS_PATH";
Project_Include_Path_File : constant String := "ADA_PRJ_INCLUDE_FILE";
Project_Objects_Path_File : constant String := "ADA_PRJ_OBJECTS_FILE";
procedure Initialize;
-- Initialize internal tables
function Normalize_Directory_Name (Directory : String) return String_Ptr;
-- Verify and normalize a directory name. If directory name is invalid,
-- this will return an empty string. Otherwise it will insure a trailing
-- slash and make other normalizations.
type File_Type is (Source, Library, Config, Definition, Preprocessing_Data);
function Find_File
(N : File_Name_Type;
T : File_Type) return File_Name_Type;
-- Finds a source, library or config file depending on the value of T
-- following the directory search order rules unless N is the name of the
-- file just read with Next_Main_File and already contains directory
-- information, in which case just look in the Primary_Directory. Returns
-- File_Name_Type of the full file name if found, No_File if file not
-- found. Note that for the special case of gnat.adc, only the compilation
-- environment directory is searched, i.e. the directory where the ali and
-- object files are written. Another special case is Debug_Generated_Code
-- set and the file name ends in ".dg", in which case we look for the
-- generated file only in the current directory, since that is where it is
-- always built.
function Get_File_Names_Case_Sensitive return Int;
pragma Import (C, Get_File_Names_Case_Sensitive,
"__gnat_get_file_names_case_sensitive");
File_Names_Case_Sensitive : constant Boolean :=
Get_File_Names_Case_Sensitive /= 0;
-- Set to indicate whether the operating system convention is for file
-- names to be case sensitive (e.g., in Unix, set True), or non case
-- sensitive (e.g., in Windows, set False).
procedure Canonical_Case_File_Name (S : in out String);
-- Given a file name, converts it to canonical case form. For systems
-- where file names are case sensitive, this procedure has no effect.
-- If file names are not case sensitive (i.e. for example if you have
-- the file "xyz.adb", you can refer to it as XYZ.adb or XyZ.AdB), then
-- this call converts the given string to canonical all lower case form,
-- so that two file names compare equal if they refer to the same file.
function Get_Env_Vars_Case_Sensitive return Int;
pragma Import (C, Get_Env_Vars_Case_Sensitive,
"__gnat_get_env_vars_case_sensitive");
Env_Vars_Case_Sensitive : constant Boolean :=
Get_Env_Vars_Case_Sensitive /= 0;
-- Set to indicate whether the operating system convention is for
-- environment variable names to be case sensitive (e.g., in Unix, set
-- True), or non case sensitive (e.g., in Windows, set False).
procedure Canonical_Case_Env_Var_Name (S : in out String);
-- Given an environment variable name, converts it to canonical case form.
-- For systems where environment variable names are case sensitive, this
-- procedure has no effect. If environment variable names are not case
-- sensitive, then this call converts the given string to canonical all
-- lower case form, so that two environment variable names compare equal if
-- they refer to the same environment variable.
function Number_Of_Files return Int;
-- Gives the total number of filenames found on the command line
No_Index : constant := -1;
-- Value used in Add_File to indicate no index is specified for main
procedure Add_File (File_Name : String; Index : Int := No_Index);
-- Called by the subprogram processing the command line for each file name
-- found. The index, when not defaulted to No_Index is the index of the
-- subprogram in its source, zero indicating that the source is not
-- multi-unit.
procedure Find_Program_Name;
-- Put simple name of current program being run (excluding the directory
-- path) in Name_Buffer, with the length in Name_Len.
function Program_Name (Nam : String; Prog : String) return String_Access;
-- In the native compilation case, Create a string containing Nam. In the
-- cross compilation case, looks at the prefix of the current program being
-- run and prepend it to Nam. For instance if the program being run is
-- <target>-gnatmake and Nam is "gcc", the returned value will be a pointer
-- to "<target>-gcc". In the specific case where AAMP_On_Target is set, the
-- name "gcc" is mapped to "gnaamp", and names of the form "gnat*" are
-- mapped to "gnaamp*". This function clobbers Name_Buffer and Name_Len.
-- Also look at any suffix, e.g. gnatmake-4.1 -> "gcc-4.1". Prog is the
-- default name of the current program being executed, e.g. "gnatmake",
-- "gnatlink".
procedure Write_Program_Name;
-- Writes name of program as invoked to the current output (normally
-- standard output).
procedure Fail (S : String);
pragma No_Return (Fail);
-- Outputs error message S preceded by the name of the executing program
-- and exits with E_Fatal. The output goes to standard error, except if
-- special output is in effect (see Output).
function Is_Directory_Separator (C : Character) return Boolean;
-- Returns True if C is a directory separator
function Get_Directory (Name : File_Name_Type) return File_Name_Type;
-- Get the prefix directory name (if any) from Name. The last separator
-- is preserved. Return the normalized current directory if there is no
-- directory part in the name.
function Is_Readonly_Library (File : File_Name_Type) return Boolean;
-- Check if this library file is a read-only file
function Strip_Directory (Name : File_Name_Type) return File_Name_Type;
-- Strips the prefix directory name (if any) from Name. Returns the
-- stripped name. Name cannot end with a directory separator.
function Strip_Suffix (Name : File_Name_Type) return File_Name_Type;
-- Strips the suffix (the last '.' and whatever comes after it) from Name.
-- Returns the stripped name.
function Executable_Name
(Name : File_Name_Type;
Only_If_No_Suffix : Boolean := False) return File_Name_Type;
-- Given a file name it adds the appropriate suffix at the end so that
-- it becomes the name of the executable on the system at end. For
-- instance under DOS it adds the ".exe" suffix, whereas under UNIX no
-- suffix is added.
function Executable_Name
(Name : String;
Only_If_No_Suffix : Boolean := False) return String;
-- Same as above, with String parameters
function File_Stamp (Name : File_Name_Type) return Time_Stamp_Type;
-- Returns the time stamp of file Name. Name should include relative path
-- information in order to locate it. If the source file cannot be opened,
-- or Name = No_File, and all blank time stamp is returned (this is not an
-- error situation).
function File_Stamp (Name : Path_Name_Type) return Time_Stamp_Type;
-- Same as above for a path name
type String_Access_List is array (Positive range <>) of String_Access;
-- Dereferenced type used to return a list of file specs in
-- To_Canonical_File_List.
type String_Access_List_Access is access all String_Access_List;
-- Type used to return a String_Access_List without dragging in secondary
-- stack.
function To_Canonical_File_List
(Wildcard_Host_File : String;
Only_Dirs : Boolean) return String_Access_List_Access;
-- Expand a wildcard host syntax file or directory specification (e.g. on
-- a VMS host, any file or directory spec that contains: "*", or "%", or
-- "...") and return a list of valid Unix syntax file or directory specs.
-- If Only_Dirs is True, then only return directories.
function To_Canonical_Dir_Spec
(Host_Dir : String;
Prefix_Style : Boolean) return String_Access;
-- Convert a host syntax directory specification (e.g. on a VMS host:
-- "SYS$DEVICE:[DIR]") to canonical (Unix) syntax (e.g. "/sys$device/dir").
-- If Prefix_Style then make it a valid file specification prefix. A file
-- specification prefix is a directory specification that can be appended
-- with a simple file specification to yield a valid absolute or relative
-- path to a file. On a conversion to Unix syntax this simply means the
-- spec has a trailing slash ("/").
function To_Canonical_File_Spec
(Host_File : String) return String_Access;
-- Convert a host syntax file specification (e.g. on a VMS host:
-- "SYS$DEVICE:[DIR]FILE.EXT;69 to canonical (Unix) syntax (e.g.
-- "/sys$device/dir/file.ext.69").
function To_Canonical_Path_Spec
(Host_Path : String) return String_Access;
-- Convert a host syntax Path specification (e.g. on a VMS host:
-- "SYS$DEVICE:[BAR],DISK$USER:[FOO] to canonical (Unix) syntax (e.g.
-- "/sys$device/foo:disk$user/foo").
function To_Host_Dir_Spec
(Canonical_Dir : String;
Prefix_Style : Boolean) return String_Access;
-- Convert a canonical syntax directory specification to host syntax. The
-- Prefix_Style flag is currently ignored but should be set to False.
-- Note that the caller must free result.
function To_Host_File_Spec
(Canonical_File : String) return String_Access;
-- Convert a canonical syntax file specification to host syntax
function Relocate_Path
(Prefix : String;
Path : String) return String_Ptr;
-- Given an absolute path and a prefix, if Path starts with Prefix,
-- replace the Prefix substring with the root installation directory.
-- By default, try to compute the root installation directory by looking
-- at the executable name as it was typed on the command line and, if
-- needed, use the PATH environment variable. If the above computation
-- fails, return Path. This function assumes Prefix'First = Path'First.
function Shared_Lib (Name : String) return String;
-- Returns the runtime shared library in the form -l<name>-<version> where
-- version is the GNAT runtime library option for the platform. For example
-- this routine called with Name set to "gnat" will return "-lgnat-5.02"
-- on UNIX and Windows and -lgnat_5_02 on VMS.
---------------------
-- File attributes --
---------------------
-- The following subprograms offer services similar to those found in
-- System.OS_Lib, but with the ability to extra multiple information from
-- a single system call, depending on the system. This can result in fewer
-- system calls when reused.
-- In all these subprograms, the requested value is either read from the
-- File_Attributes parameter (resulting in no system call), or computed
-- from the disk and then cached in the File_Attributes parameter (possibly
-- along with other values).
type File_Attributes is private;
Unknown_Attributes : constant File_Attributes;
-- A cache for various attributes for a file (length, accessibility,...)
-- This must be initialized to Unknown_Attributes prior to the first call.
function Is_Directory
(Name : C_File_Name;
Attr : access File_Attributes) return Boolean;
function Is_Regular_File
(Name : C_File_Name;
Attr : access File_Attributes) return Boolean;
function Is_Symbolic_Link
(Name : C_File_Name;
Attr : access File_Attributes) return Boolean;
-- Return the type of the file,
function File_Length
(Name : C_File_Name;
Attr : access File_Attributes) return Long_Integer;
-- Return the length (number of bytes) of the file
function File_Time_Stamp
(Name : C_File_Name;
Attr : access File_Attributes) return OS_Time;
function File_Time_Stamp
(Name : Path_Name_Type;
Attr : access File_Attributes) return Time_Stamp_Type;
-- Return the time stamp of the file
function Is_Readable_File
(Name : C_File_Name;
Attr : access File_Attributes) return Boolean;
function Is_Executable_File
(Name : C_File_Name;
Attr : access File_Attributes) return Boolean;
function Is_Writable_File
(Name : C_File_Name;
Attr : access File_Attributes) return Boolean;
-- Return the access rights for the file
-------------------------
-- Search Dir Routines --
-------------------------
function Include_Dir_Default_Prefix return String;
-- Return the directory of the run-time library sources, as modified
-- by update_path.
function Object_Dir_Default_Prefix return String;
-- Return the directory of the run-time library ALI and object files, as
-- modified by update_path.
procedure Add_Default_Search_Dirs;
-- This routine adds the default search dirs indicated by the environment
-- variables and sdefault package, as well as the library search dirs set
-- by option -gnateO for GNAT2WHY.
procedure Add_Lib_Search_Dir (Dir : String);
-- Add Dir at the end of the library file search path
procedure Add_Src_Search_Dir (Dir : String);
-- Add Dir at the end of the source file search path
procedure Get_Next_Dir_In_Path_Init
(Search_Path : String_Access);
function Get_Next_Dir_In_Path
(Search_Path : String_Access) return String_Access;
-- These subprograms are used to parse out the directory names in a search
-- path specified by a Search_Path argument. The procedure initializes an
-- internal pointer to point to the initial directory name, and calls to
-- the function return successive directory names, with a null pointer
-- marking the end of the list.
type Search_File_Type is (Include, Objects);
procedure Add_Search_Dirs
(Search_Path : String_Ptr;
Path_Type : Search_File_Type);
-- These procedure adds all the search directories that are in Search_Path
-- in the proper file search path (library or source)
function Get_Primary_Src_Search_Directory return String_Ptr;
-- Retrieved the primary directory (directory containing the main source
-- file for Gnatmake.
function Nb_Dir_In_Src_Search_Path return Natural;
function Dir_In_Src_Search_Path (Position : Natural) return String_Ptr;
-- Functions to access the directory names in the source search path
function Nb_Dir_In_Obj_Search_Path return Natural;
function Dir_In_Obj_Search_Path (Position : Natural) return String_Ptr;
-- Functions to access the directory names in the Object search path
Include_Search_File : constant String_Access :=
new String'("ada_source_path");
Objects_Search_File : constant String_Access :=
new String'("ada_object_path");
-- Names of the files containing the default include or objects search
-- directories. These files, located in Sdefault.Search_Dir_Prefix, do
-- not necessarily exist.
Exec_Name : String_Ptr;
-- Executable name as typed by the user (used to compute the
-- executable prefix).
function Read_Default_Search_Dirs
(Search_Dir_Prefix : String_Access;
Search_File : String_Access;
Search_Dir_Default_Name : String_Access) return String_Access;
-- Read and return the default search directories from the file located
-- in Search_Dir_Prefix (as modified by update_path) and named Search_File.
-- If no such file exists or an error occurs then instead return the
-- Search_Dir_Default_Name (as modified by update_path).
function Get_RTS_Search_Dir
(Search_Dir : String;
File_Type : Search_File_Type) return String_Ptr;
-- This function retrieves the paths to the search (resp. lib) dirs and
-- return them. The search dir can be absolute or relative. If the search
-- dir contains Include_Search_File (resp. Object_Search_File), then this
-- function reads and returns the default search directories from the file.
-- Otherwise, if the directory is absolute, it will try to find 'adalib'
-- (resp. 'adainclude'). If found, null is returned. If the directory is
-- relative, the following directories for the directories 'adalib' and
-- 'adainclude' will be scanned:
--
-- - current directory (from which the tool has been spawned)
-- - $GNAT_ROOT/gcc/gcc-lib/$targ/$vers/
-- - $GNAT_ROOT/gcc/gcc-lib/$targ/$vers/rts-
--
-- The scan will stop as soon as the directory being searched for (adalib
-- or adainclude) is found. If the scan fails, null is returned.
-----------------------
-- Source File Input --
-----------------------
-- Source file input routines are used by the compiler to read the main
-- source files and the subsidiary source files (e.g. with'ed units), and
-- also by the binder to check presence/time stamps of sources.
procedure Read_Source_File
(N : File_Name_Type;
Lo : Source_Ptr;
Hi : out Source_Ptr;
Src : out Source_Buffer_Ptr;
T : File_Type := Source);
-- Allocates a Source_Buffer of appropriate length and then reads the
-- entire contents of the source file N into the buffer. The address of
-- the allocated buffer is returned in Src.
--
-- Each line of text is terminated by one of the sequences:
--
-- CR
-- CR/LF
-- LF
-- The source is terminated by an EOF (16#1A#) character, which is the last
-- character of the returned source buffer (note that any EOF characters in
-- positions other than the last source character are treated as blanks).
--
-- The logical lower bound of the source buffer is the input value of Lo,
-- and on exit Hi is set to the logical upper bound of the source buffer.
-- Note that the returned value in Src points to an array with a physical
-- lower bound of zero. This virtual origin addressing approach means that
-- a constrained array pointer can be used with a low bound of zero which
-- results in more efficient code.
--
-- If the given file cannot be opened, then the action depends on whether
-- this file is the current main unit (i.e. its name matches the name
-- returned by the most recent call to Next_Main_Source). If so, then the
-- failure to find the file is a fatal error, an error message is output,
-- and program execution is terminated. Otherwise (for the case of a
-- subsidiary source loaded directly or indirectly using with), a file
-- not found condition causes null to be set as the result value.
--
-- Note that the name passed to this function is the simple file name,
-- without any directory information. The implementation is responsible
-- for searching for the file in the appropriate directories.
--
-- Note the special case that if the file name is gnat.adc, then the search
-- for the file is done ONLY in the directory corresponding to the current
-- compilation environment, i.e. in the same directory where the ali and
-- object files will be written.
function Full_Source_Name return File_Name_Type;
function Current_Source_File_Stamp return Time_Stamp_Type;
-- Returns the full name/time stamp of the source file most recently read
-- using Read_Source_File. Calling this routine entails no source file
-- directory lookup penalty.
procedure Full_Source_Name
(N : File_Name_Type;
Full_File : out File_Name_Type;
Attr : access File_Attributes);
function Full_Source_Name (N : File_Name_Type) return File_Name_Type;
function Source_File_Stamp (N : File_Name_Type) return Time_Stamp_Type;
-- Returns the full name/time stamp of the source file whose simple name
-- is N which should not include path information. Note that if the file
-- cannot be located No_File is returned for the first routine and an all
-- blank time stamp is returned for the second (this is not an error
-- situation). The full name includes appropriate directory information.
-- The source file directory lookup penalty is incurred every single time
-- the routines are called unless you have previously called
-- Source_File_Data (Cache => True). See below.
--
-- The procedural version also returns some file attributes for the ALI
-- file (to save on system calls later on).
function Current_File_Index return Int;
-- Return the index in its source file of the current main unit
function Matching_Full_Source_Name
(N : File_Name_Type;
T : Time_Stamp_Type) return File_Name_Type;
-- Same semantics than Full_Source_Name but will search on the source path
-- until a source file with time stamp matching T is found. If none is
-- found returns No_File.
procedure Source_File_Data (Cache : Boolean);
-- By default source file data (full source file name and time stamp)
-- are looked up every time a call to Full_Source_Name (N) or
-- Source_File_Stamp (N) is made. This may be undesirable in certain
-- applications as this is uselessly slow if source file data does not
-- change during program execution. When this procedure is called with
-- Cache => True access to source file data does not incur a penalty if
-- this data was previously retrieved.
procedure Dump_Source_File_Names;
-- Prints out the names of all source files that have been read by
-- Read_Source_File, except those that come from the run-time library
-- (i.e. Include_Dir_Default_Prefix). The text is sent to whatever Output
-- is currently using (e.g. standard output or standard error).
-------------------------------------------
-- Representation of Library Information --
-------------------------------------------
-- Associated with each compiled source file is library information, a
-- string of bytes whose exact format is described in the body of Lib.Writ.
-- Compiling a source file generates this library information for the
-- compiled unit, and access the library information for units that were
-- compiled previously on which the unit being compiled depends.
-- How this information is stored is up to the implementation of this
-- package. At the interface level, this information is simply associated
-- with its corresponding source.
-- Several different implementations are possible:
-- 1. The information could be directly associated with the source file,
-- e.g. placed in a resource fork of this file on the Mac, or on
-- MS-DOS, written to the source file after the end of file mark.
-- 2. The information could be written into the generated object module
-- if the system supports the inclusion of arbitrary informational
-- byte streams into object files. In this case there must be a naming
-- convention that allows object files to be located given the name of
-- the corresponding source file.
-- 3. The information could be written to a separate file, whose name is
-- related to the name of the source file by a fixed convention.
-- Which of these three methods is chosen depends on the constraints of the
-- host operating system. The interface described here is independent of
-- which of these approaches is used. Currently all versions of GNAT use
-- the third approach with a file name of xxx.ali where xxx is the source
-- file name.
-------------------------------
-- Library Information Input --
-------------------------------
-- These subprograms are used by the binder to read library information
-- files, see section above for representation of these files.
function Read_Library_Info
(Lib_File : File_Name_Type;
Fatal_Err : Boolean := False) return Text_Buffer_Ptr;
-- Allocates a Text_Buffer of appropriate length and reads in the entire
-- source of the library information from the library information file
-- whose name is given by the parameter Name.
--
-- See description of Read_Source_File for details on the format of the
-- returned text buffer (the format is identical). The lower bound of
-- the Text_Buffer is always zero
--
-- If the specified file cannot be opened, then the action depends on
-- Fatal_Err. If Fatal_Err is True, an error message is given and the
-- compilation is abandoned. Otherwise if Fatal_Err is False, then null
-- is returned. Note that the Lib_File is a simple name which does not
-- include any directory information. The implementation is responsible
-- for searching for the file in appropriate directories.
--
-- If Opt.Check_Object_Consistency is set to True then this routine checks
-- whether the object file corresponding to the Lib_File is consistent with
-- it. The object file is inconsistent if the object does not exist or if
-- it has an older time stamp than Lib_File. This check is not performed
-- when the Lib_File is "locked" (i.e. read/only) because in this case the
-- object file may be buried in a library. In case of inconsistencies
-- Read_Library_Info behaves as if it did not find Lib_File (namely if
-- Fatal_Err is False, null is returned).
function Read_Library_Info_From_Full
(Full_Lib_File : File_Name_Type;
Lib_File_Attr : access File_Attributes;
Fatal_Err : Boolean := False) return Text_Buffer_Ptr;
-- Same as Read_Library_Info, except Full_Lib_File must contains the full
-- path to the library file (instead of having Read_Library_Info recompute
-- it).
-- Lib_File_Attr should be an initialized set of attributes for the
-- library file (it can be initialized to Unknown_Attributes, but in
-- general will have been initialized by a previous call to Find_File).
function Full_Library_Info_Name return File_Name_Type;
function Full_Object_File_Name return File_Name_Type;
-- Returns the full name of the library/object file most recently read
-- using Read_Library_Info, including appropriate directory information.
-- Calling this routine entails no library file directory lookup
-- penalty. Note that the object file corresponding to a library file
-- is not actually read. Its time stamp is affected when the flag
-- Opt.Check_Object_Consistency is set.
function Current_Library_File_Stamp return Time_Stamp_Type;
function Current_Object_File_Stamp return Time_Stamp_Type;
-- The time stamps of the files returned by the previous two routines.
-- It is an error to call Current_Object_File_Stamp if
-- Opt.Check_Object_Consistency is set to False.
procedure Full_Lib_File_Name
(N : File_Name_Type;
Lib_File : out File_Name_Type;
Attr : out File_Attributes);
function Full_Lib_File_Name (N : File_Name_Type) return File_Name_Type;
-- Returns the full name of library file N. N should not include
-- path information. Note that if the file cannot be located No_File is
-- returned for the first routine and an all blank time stamp is returned
-- for the second (this is not an error situation). The full name includes
-- the appropriate directory information. The library file directory lookup
-- penalty is incurred every single time this routine is called.
-- The procedural version also returns some file attributes for the ALI
-- file (to save on system calls later on).
function Lib_File_Name
(Source_File : File_Name_Type;
Munit_Index : Nat := 0) return File_Name_Type;
-- Given the name of a source file, returns the name of the corresponding
-- library information file. This may be the name of the object file or of
-- a separate file used to store the library information. In the current
-- implementation, a separate file (the ALI file) is always used. In either
-- case the returned result is suitable for calling Read_Library_Info. The
-- Munit_Index is the unit index in multiple unit per file mode, or zero in
-- normal single unit per file mode (used to add ~nnn suffix). Note: this
-- subprogram is in this section because it is used by the compiler to
-- determine the proper library information names to be placed in the
-- generated library information file.
-----------------
-- Termination --
-----------------
Current_Exit_Status : Integer := 0;
-- Exit status that is set with procedure OS_Exit_Through_Exception below
-- and can be used in exception handler for Types.Terminate_Program to call
-- Set_Exit_Status as the last action of the program.
procedure OS_Exit_Through_Exception (Status : Integer);
pragma No_Return (OS_Exit_Through_Exception);
-- Set the Current_Exit_Status, then raise Types.Terminate_Program
type Exit_Code_Type is (
E_Success, -- No warnings or errors
E_Warnings, -- Compiler warnings generated
E_No_Code, -- No code generated
E_No_Compile, -- Compilation not needed (smart recompilation)
E_Errors, -- Compiler error messages generated
E_Fatal, -- Fatal (serious) error, e.g. source file not found
E_Abort); -- Internally detected compiler error
procedure Exit_Program (Exit_Code : Exit_Code_Type);
pragma No_Return (Exit_Program);
-- A call to Exit_Program terminates execution with the given status. A
-- status of zero indicates normal completion, a non-zero status indicates
-- abnormal termination.
-------------------------
-- Command Line Access --
-------------------------
-- Direct interface to command line parameters. (We don't want to use
-- the predefined command line package because it defines functions
-- returning string)
function Arg_Count return Natural;
pragma Import (C, Arg_Count, "__gnat_arg_count");
-- Get number of arguments (note: optional globbing may be enabled)
procedure Fill_Arg (A : System.Address; Arg_Num : Integer);
pragma Import (C, Fill_Arg, "__gnat_fill_arg");
-- Store one argument
function Len_Arg (Arg_Num : Integer) return Integer;
pragma Import (C, Len_Arg, "__gnat_len_arg");
-- Get length of argument
ALI_Default_Suffix : constant String_Ptr := new String'("ali");
ALI_Suffix : String_Ptr := ALI_Default_Suffix;
-- The suffixes used for the library files (also known as ALI files)
private
Current_Main : File_Name_Type := No_File;
-- Used to save a simple file name between calls to Next_Main_Source and
-- Read_Source_File. If the file name argument to Read_Source_File is
-- No_File, that indicates that the file whose name was returned by the
-- last call to Next_Main_Source (and stored here) is to be read.
Target_Object_Suffix : constant String := Get_Target_Object_Suffix.all;
-- The suffix used for the target object files
Output_FD : File_Descriptor;
-- File descriptor for current library info, list, tree, or binder output
Output_File_Name : File_Name_Type;
-- File_Name_Type for name of open file whose FD is in Output_FD, the name
-- stored does not include the trailing NUL character.
Argument_Count : constant Integer := Arg_Count - 1;
-- Number of arguments (excluding program name)
type File_Name_Array is array (Int range <>) of String_Ptr;
type File_Name_Array_Ptr is access File_Name_Array;
File_Names : File_Name_Array_Ptr :=
new File_Name_Array (1 .. Int (Argument_Count) + 2);
-- As arguments are scanned, file names are stored in this array. The
-- strings do not have terminating NUL files. The array is extensible,
-- because when using project files, there may be more files than
-- arguments on the command line.
type File_Index_Array is array (Int range <>) of Int;
type File_Index_Array_Ptr is access File_Index_Array;
File_Indexes : File_Index_Array_Ptr :=
new File_Index_Array (1 .. Int (Argument_Count) + 2);
Current_File_Name_Index : Int := 0;
-- The index in File_Names of the last file opened by Next_Main_Source
-- or Next_Main_Lib_File. The value 0 indicates that no files have been
-- opened yet.
procedure Create_File_And_Check
(Fdesc : out File_Descriptor;
Fmode : Mode);
-- Create file whose name (NUL terminated) is in Name_Buffer (with the
-- length in Name_Len), and place the resulting descriptor in Fdesc. Issue
-- message and exit with fatal error if file cannot be created. The Fmode
-- parameter is set to either Text or Binary (for details see description
-- of System.OS_Lib.Create_File).
type Program_Type is (Compiler, Binder, Make, Gnatls, Unspecified);
-- Program currently running
procedure Set_Program (P : Program_Type);
-- Indicates to the body of Osint the program currently running. This
-- procedure is called by the child packages of Osint. A check is made
-- that this procedure is not called more than once.
function More_Files return Boolean;
-- Implements More_Source_Files and More_Lib_Files
function Next_Main_File return File_Name_Type;
-- Implements Next_Main_Source and Next_Main_Lib_File
function Object_File_Name (N : File_Name_Type) return File_Name_Type;
-- Constructs the name of the object file corresponding to library file N.
-- If N is a full file name than the returned file name will also be a full
-- file name. Note that no lookup in the library file directories is done
-- for this file. This routine merely constructs the name.
procedure Write_Info (Info : String);
-- Implementation of Write_Binder_Info, Write_Debug_Info and
-- Write_Library_Info (identical)
procedure Write_With_Check (A : Address; N : Integer);
-- Writes N bytes from buffer starting at address A to file whose FD is
-- stored in Output_FD, and whose file name is stored as a File_Name_Type
-- in Output_File_Name. A check is made for disk full, and if this is
-- detected, the file being written is deleted, and a fatal error is
-- signalled.
File_Attributes_Size : constant Natural := 24;
-- This should be big enough to fit a "struct file_attributes" on any
-- system. It doesn't cause any malfunction if it is too big (which avoids
-- the need for either mapping the struct exactly or importing the sizeof
-- from C, which would result in dynamic code). However, it does waste
-- space (e.g. when a component of this type appears in a record, if it is
-- unnecessarily large).
type File_Attributes is
array (1 .. File_Attributes_Size)
of System.Storage_Elements.Storage_Element;
for File_Attributes'Alignment use Standard'Maximum_Alignment;
Unknown_Attributes : constant File_Attributes := (others => 0);
-- Will be initialized properly at elaboration (for efficiency later on,
-- avoid function calls every time we want to reset the attributes).
end Osint;