1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2013, Free Software Foundation, Inc. --
11 -- GNAT is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 3, or (at your option) any later ver- --
14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNAT; see file COPYING3. If not, go to --
19 -- http://www.gnu.org/licenses for a complete copy of the license. --
21 -- GNAT was originally developed by the GNAT team at New York University. --
22 -- Extensive contributions were provided by Ada Core Technologies Inc. --
24 ------------------------------------------------------------------------------
26 -- This package contains the low level, operating system routines used in the
27 -- compiler and binder for command line processing and file input output.
29 with Namet; use Namet;
30 with Types; use Types;
32 with System; use System;
34 pragma Warnings (Off);
35 -- This package is used also by gnatcoll
36 with System.OS_Lib; use System.OS_Lib;
39 with System.Storage_Elements;
41 pragma Elaborate_All (System.OS_Lib);
42 -- For the call to function Get_Target_Object_Suffix in the private part
46 Multi_Unit_Index_Character : Character := '~';
47 -- The character before the index of the unit in a multi-unit source in ALI
48 -- and object file names. Changed to '$' on VMS.
50 Ada_Include_Path : constant String := "ADA_INCLUDE_PATH";
51 Ada_Objects_Path : constant String := "ADA_OBJECTS_PATH";
52 Project_Include_Path_File : constant String := "ADA_PRJ_INCLUDE_FILE";
53 Project_Objects_Path_File : constant String := "ADA_PRJ_OBJECTS_FILE";
56 -- Initialize internal tables
58 function Normalize_Directory_Name (Directory : String) return String_Ptr;
59 -- Verify and normalize a directory name. If directory name is invalid,
60 -- this will return an empty string. Otherwise it will insure a trailing
61 -- slash and make other normalizations.
63 type File_Type is (Source, Library, Config, Definition, Preprocessing_Data);
67 T : File_Type) return File_Name_Type;
68 -- Finds a source, library or config file depending on the value of T
69 -- following the directory search order rules unless N is the name of the
70 -- file just read with Next_Main_File and already contains directory
71 -- information, in which case just look in the Primary_Directory. Returns
72 -- File_Name_Type of the full file name if found, No_File if file not
73 -- found. Note that for the special case of gnat.adc, only the compilation
74 -- environment directory is searched, i.e. the directory where the ali and
75 -- object files are written. Another special case is Debug_Generated_Code
76 -- set and the file name ends in ".dg", in which case we look for the
77 -- generated file only in the current directory, since that is where it is
80 function Get_File_Names_Case_Sensitive return Int;
81 pragma Import (C, Get_File_Names_Case_Sensitive,
82 "__gnat_get_file_names_case_sensitive");
83 File_Names_Case_Sensitive : constant Boolean :=
84 Get_File_Names_Case_Sensitive /= 0;
85 -- Set to indicate whether the operating system convention is for file
86 -- names to be case sensitive (e.g., in Unix, set True), or non case
87 -- sensitive (e.g., in Windows, set False).
89 procedure Canonical_Case_File_Name (S : in out String);
90 -- Given a file name, converts it to canonical case form. For systems
91 -- where file names are case sensitive, this procedure has no effect.
92 -- If file names are not case sensitive (i.e. for example if you have
93 -- the file "xyz.adb", you can refer to it as XYZ.adb or XyZ.AdB), then
94 -- this call converts the given string to canonical all lower case form,
95 -- so that two file names compare equal if they refer to the same file.
97 function Get_Env_Vars_Case_Sensitive return Int;
98 pragma Import (C, Get_Env_Vars_Case_Sensitive,
99 "__gnat_get_env_vars_case_sensitive");
100 Env_Vars_Case_Sensitive : constant Boolean :=
101 Get_Env_Vars_Case_Sensitive /= 0;
102 -- Set to indicate whether the operating system convention is for
103 -- environment variable names to be case sensitive (e.g., in Unix, set
104 -- True), or non case sensitive (e.g., in Windows, set False).
106 procedure Canonical_Case_Env_Var_Name (S : in out String);
107 -- Given an environment variable name, converts it to canonical case form.
108 -- For systems where environment variable names are case sensitive, this
109 -- procedure has no effect. If environment variable names are not case
110 -- sensitive, then this call converts the given string to canonical all
111 -- lower case form, so that two environment variable names compare equal if
112 -- they refer to the same environment variable.
114 function Number_Of_Files return Int;
115 -- Gives the total number of filenames found on the command line
117 No_Index : constant := -1;
118 -- Value used in Add_File to indicate no index is specified for main
120 procedure Add_File (File_Name : String; Index : Int := No_Index);
121 -- Called by the subprogram processing the command line for each file name
122 -- found. The index, when not defaulted to No_Index is the index of the
123 -- subprogram in its source, zero indicating that the source is not
126 procedure Find_Program_Name;
127 -- Put simple name of current program being run (excluding the directory
128 -- path) in Name_Buffer, with the length in Name_Len.
130 function Program_Name (Nam : String; Prog : String) return String_Access;
131 -- In the native compilation case, Create a string containing Nam. In the
132 -- cross compilation case, looks at the prefix of the current program being
133 -- run and prepend it to Nam. For instance if the program being run is
134 -- <target>-gnatmake and Nam is "gcc", the returned value will be a pointer
135 -- to "<target>-gcc". In the specific case where AAMP_On_Target is set, the
136 -- name "gcc" is mapped to "gnaamp", and names of the form "gnat*" are
137 -- mapped to "gnaamp*". This function clobbers Name_Buffer and Name_Len.
138 -- Also look at any suffix, e.g. gnatmake-4.1 -> "gcc-4.1". Prog is the
139 -- default name of the current program being executed, e.g. "gnatmake",
142 procedure Write_Program_Name;
143 -- Writes name of program as invoked to the current output (normally
146 procedure Fail (S : String);
147 pragma No_Return (Fail);
148 -- Outputs error message S preceded by the name of the executing program
149 -- and exits with E_Fatal. The output goes to standard error, except if
150 -- special output is in effect (see Output).
152 function Is_Directory_Separator (C : Character) return Boolean;
153 -- Returns True if C is a directory separator
155 function Get_Directory (Name : File_Name_Type) return File_Name_Type;
156 -- Get the prefix directory name (if any) from Name. The last separator
157 -- is preserved. Return the normalized current directory if there is no
158 -- directory part in the name.
160 function Is_Readonly_Library (File : File_Name_Type) return Boolean;
161 -- Check if this library file is a read-only file
163 function Strip_Directory (Name : File_Name_Type) return File_Name_Type;
164 -- Strips the prefix directory name (if any) from Name. Returns the
165 -- stripped name. Name cannot end with a directory separator.
167 function Strip_Suffix (Name : File_Name_Type) return File_Name_Type;
168 -- Strips the suffix (the last '.' and whatever comes after it) from Name.
169 -- Returns the stripped name.
171 function Executable_Name
172 (Name : File_Name_Type;
173 Only_If_No_Suffix : Boolean := False) return File_Name_Type;
174 -- Given a file name it adds the appropriate suffix at the end so that
175 -- it becomes the name of the executable on the system at end. For
176 -- instance under DOS it adds the ".exe" suffix, whereas under UNIX no
179 function Executable_Name
181 Only_If_No_Suffix : Boolean := False) return String;
182 -- Same as above, with String parameters
184 function File_Stamp (Name : File_Name_Type) return Time_Stamp_Type;
185 -- Returns the time stamp of file Name. Name should include relative path
186 -- information in order to locate it. If the source file cannot be opened,
187 -- or Name = No_File, and all blank time stamp is returned (this is not an
190 function File_Stamp (Name : Path_Name_Type) return Time_Stamp_Type;
191 -- Same as above for a path name
193 type String_Access_List is array (Positive range <>) of String_Access;
194 -- Dereferenced type used to return a list of file specs in
195 -- To_Canonical_File_List.
197 type String_Access_List_Access is access all String_Access_List;
198 -- Type used to return a String_Access_List without dragging in secondary
201 function To_Canonical_File_List
202 (Wildcard_Host_File : String;
203 Only_Dirs : Boolean) return String_Access_List_Access;
204 -- Expand a wildcard host syntax file or directory specification (e.g. on
205 -- a VMS host, any file or directory spec that contains: "*", or "%", or
206 -- "...") and return a list of valid Unix syntax file or directory specs.
207 -- If Only_Dirs is True, then only return directories.
209 function To_Canonical_Dir_Spec
211 Prefix_Style : Boolean) return String_Access;
212 -- Convert a host syntax directory specification (e.g. on a VMS host:
213 -- "SYS$DEVICE:[DIR]") to canonical (Unix) syntax (e.g. "/sys$device/dir").
214 -- If Prefix_Style then make it a valid file specification prefix. A file
215 -- specification prefix is a directory specification that can be appended
216 -- with a simple file specification to yield a valid absolute or relative
217 -- path to a file. On a conversion to Unix syntax this simply means the
218 -- spec has a trailing slash ("/").
220 function To_Canonical_File_Spec
221 (Host_File : String) return String_Access;
222 -- Convert a host syntax file specification (e.g. on a VMS host:
223 -- "SYS$DEVICE:[DIR]FILE.EXT;69 to canonical (Unix) syntax (e.g.
224 -- "/sys$device/dir/file.ext.69").
226 function To_Canonical_Path_Spec
227 (Host_Path : String) return String_Access;
228 -- Convert a host syntax Path specification (e.g. on a VMS host:
229 -- "SYS$DEVICE:[BAR],DISK$USER:[FOO] to canonical (Unix) syntax (e.g.
230 -- "/sys$device/foo:disk$user/foo").
232 function To_Host_Dir_Spec
233 (Canonical_Dir : String;
234 Prefix_Style : Boolean) return String_Access;
235 -- Convert a canonical syntax directory specification to host syntax. The
236 -- Prefix_Style flag is currently ignored but should be set to False.
237 -- Note that the caller must free result.
239 function To_Host_File_Spec
240 (Canonical_File : String) return String_Access;
241 -- Convert a canonical syntax file specification to host syntax
243 function Relocate_Path
245 Path : String) return String_Ptr;
246 -- Given an absolute path and a prefix, if Path starts with Prefix,
247 -- replace the Prefix substring with the root installation directory.
248 -- By default, try to compute the root installation directory by looking
249 -- at the executable name as it was typed on the command line and, if
250 -- needed, use the PATH environment variable. If the above computation
251 -- fails, return Path. This function assumes Prefix'First = Path'First.
253 function Shared_Lib (Name : String) return String;
254 -- Returns the runtime shared library in the form -l<name>-<version> where
255 -- version is the GNAT runtime library option for the platform. For example
256 -- this routine called with Name set to "gnat" will return "-lgnat-5.02"
257 -- on UNIX and Windows and -lgnat_5_02 on VMS.
259 ---------------------
260 -- File attributes --
261 ---------------------
263 -- The following subprograms offer services similar to those found in
264 -- System.OS_Lib, but with the ability to extra multiple information from
265 -- a single system call, depending on the system. This can result in fewer
266 -- system calls when reused.
268 -- In all these subprograms, the requested value is either read from the
269 -- File_Attributes parameter (resulting in no system call), or computed
270 -- from the disk and then cached in the File_Attributes parameter (possibly
271 -- along with other values).
273 type File_Attributes is private;
274 Unknown_Attributes : constant File_Attributes;
275 -- A cache for various attributes for a file (length, accessibility,...)
276 -- This must be initialized to Unknown_Attributes prior to the first call.
278 function Is_Directory
280 Attr : access File_Attributes) return Boolean;
281 function Is_Regular_File
283 Attr : access File_Attributes) return Boolean;
284 function Is_Symbolic_Link
286 Attr : access File_Attributes) return Boolean;
287 -- Return the type of the file,
291 Attr : access File_Attributes) return Long_Integer;
292 -- Return the length (number of bytes) of the file
294 function File_Time_Stamp
296 Attr : access File_Attributes) return OS_Time;
297 function File_Time_Stamp
298 (Name : Path_Name_Type;
299 Attr : access File_Attributes) return Time_Stamp_Type;
300 -- Return the time stamp of the file
302 function Is_Readable_File
304 Attr : access File_Attributes) return Boolean;
305 function Is_Executable_File
307 Attr : access File_Attributes) return Boolean;
308 function Is_Writable_File
310 Attr : access File_Attributes) return Boolean;
311 -- Return the access rights for the file
313 -------------------------
314 -- Search Dir Routines --
315 -------------------------
317 function Include_Dir_Default_Prefix return String;
318 -- Return the directory of the run-time library sources, as modified
321 function Object_Dir_Default_Prefix return String;
322 -- Return the directory of the run-time library ALI and object files, as
323 -- modified by update_path.
325 procedure Add_Default_Search_Dirs;
326 -- This routine adds the default search dirs indicated by the environment
327 -- variables and sdefault package, as well as the library search dirs set
328 -- by option -gnateO for GNAT2WHY.
330 procedure Add_Lib_Search_Dir (Dir : String);
331 -- Add Dir at the end of the library file search path
333 procedure Add_Src_Search_Dir (Dir : String);
334 -- Add Dir at the end of the source file search path
336 procedure Get_Next_Dir_In_Path_Init
337 (Search_Path : String_Access);
338 function Get_Next_Dir_In_Path
339 (Search_Path : String_Access) return String_Access;
340 -- These subprograms are used to parse out the directory names in a search
341 -- path specified by a Search_Path argument. The procedure initializes an
342 -- internal pointer to point to the initial directory name, and calls to
343 -- the function return successive directory names, with a null pointer
344 -- marking the end of the list.
346 type Search_File_Type is (Include, Objects);
348 procedure Add_Search_Dirs
349 (Search_Path : String_Ptr;
350 Path_Type : Search_File_Type);
351 -- These procedure adds all the search directories that are in Search_Path
352 -- in the proper file search path (library or source)
354 function Get_Primary_Src_Search_Directory return String_Ptr;
355 -- Retrieved the primary directory (directory containing the main source
356 -- file for Gnatmake.
358 function Nb_Dir_In_Src_Search_Path return Natural;
359 function Dir_In_Src_Search_Path (Position : Natural) return String_Ptr;
360 -- Functions to access the directory names in the source search path
362 function Nb_Dir_In_Obj_Search_Path return Natural;
363 function Dir_In_Obj_Search_Path (Position : Natural) return String_Ptr;
364 -- Functions to access the directory names in the Object search path
366 Include_Search_File : constant String_Access :=
367 new String'("ada_source_path");
368 Objects_Search_File : constant String_Access :=
369 new String'("ada_object_path");
370 -- Names of the files containing the default include or objects search
371 -- directories. These files, located in Sdefault.Search_Dir_Prefix, do
372 -- not necessarily exist.
374 Exec_Name : String_Ptr;
375 -- Executable name as typed by the user (used to compute the
376 -- executable prefix).
378 function Read_Default_Search_Dirs
379 (Search_Dir_Prefix : String_Access;
380 Search_File : String_Access;
381 Search_Dir_Default_Name : String_Access) return String_Access;
382 -- Read and return the default search directories from the file located
383 -- in Search_Dir_Prefix (as modified by update_path) and named Search_File.
384 -- If no such file exists or an error occurs then instead return the
385 -- Search_Dir_Default_Name (as modified by update_path).
387 function Get_RTS_Search_Dir
388 (Search_Dir : String;
389 File_Type : Search_File_Type) return String_Ptr;
390 -- This function retrieves the paths to the search (resp. lib) dirs and
391 -- return them. The search dir can be absolute or relative. If the search
392 -- dir contains Include_Search_File (resp. Object_Search_File), then this
393 -- function reads and returns the default search directories from the file.
394 -- Otherwise, if the directory is absolute, it will try to find 'adalib'
395 -- (resp. 'adainclude'). If found, null is returned. If the directory is
396 -- relative, the following directories for the directories 'adalib' and
397 -- 'adainclude' will be scanned:
399 -- - current directory (from which the tool has been spawned)
400 -- - $GNAT_ROOT/gcc/gcc-lib/$targ/$vers/
401 -- - $GNAT_ROOT/gcc/gcc-lib/$targ/$vers/rts-
403 -- The scan will stop as soon as the directory being searched for (adalib
404 -- or adainclude) is found. If the scan fails, null is returned.
406 -----------------------
407 -- Source File Input --
408 -----------------------
410 -- Source file input routines are used by the compiler to read the main
411 -- source files and the subsidiary source files (e.g. with'ed units), and
412 -- also by the binder to check presence/time stamps of sources.
414 procedure Read_Source_File
418 Src : out Source_Buffer_Ptr;
419 T : File_Type := Source);
420 -- Allocates a Source_Buffer of appropriate length and then reads the
421 -- entire contents of the source file N into the buffer. The address of
422 -- the allocated buffer is returned in Src.
424 -- Each line of text is terminated by one of the sequences:
430 -- The source is terminated by an EOF (16#1A#) character, which is the last
431 -- character of the returned source buffer (note that any EOF characters in
432 -- positions other than the last source character are treated as blanks).
434 -- The logical lower bound of the source buffer is the input value of Lo,
435 -- and on exit Hi is set to the logical upper bound of the source buffer.
436 -- Note that the returned value in Src points to an array with a physical
437 -- lower bound of zero. This virtual origin addressing approach means that
438 -- a constrained array pointer can be used with a low bound of zero which
439 -- results in more efficient code.
441 -- If the given file cannot be opened, then the action depends on whether
442 -- this file is the current main unit (i.e. its name matches the name
443 -- returned by the most recent call to Next_Main_Source). If so, then the
444 -- failure to find the file is a fatal error, an error message is output,
445 -- and program execution is terminated. Otherwise (for the case of a
446 -- subsidiary source loaded directly or indirectly using with), a file
447 -- not found condition causes null to be set as the result value.
449 -- Note that the name passed to this function is the simple file name,
450 -- without any directory information. The implementation is responsible
451 -- for searching for the file in the appropriate directories.
453 -- Note the special case that if the file name is gnat.adc, then the search
454 -- for the file is done ONLY in the directory corresponding to the current
455 -- compilation environment, i.e. in the same directory where the ali and
456 -- object files will be written.
458 function Full_Source_Name return File_Name_Type;
459 function Current_Source_File_Stamp return Time_Stamp_Type;
460 -- Returns the full name/time stamp of the source file most recently read
461 -- using Read_Source_File. Calling this routine entails no source file
462 -- directory lookup penalty.
464 procedure Full_Source_Name
466 Full_File : out File_Name_Type;
467 Attr : access File_Attributes);
468 function Full_Source_Name (N : File_Name_Type) return File_Name_Type;
469 function Source_File_Stamp (N : File_Name_Type) return Time_Stamp_Type;
470 -- Returns the full name/time stamp of the source file whose simple name
471 -- is N which should not include path information. Note that if the file
472 -- cannot be located No_File is returned for the first routine and an all
473 -- blank time stamp is returned for the second (this is not an error
474 -- situation). The full name includes appropriate directory information.
475 -- The source file directory lookup penalty is incurred every single time
476 -- the routines are called unless you have previously called
477 -- Source_File_Data (Cache => True). See below.
479 -- The procedural version also returns some file attributes for the ALI
480 -- file (to save on system calls later on).
482 function Current_File_Index return Int;
483 -- Return the index in its source file of the current main unit
485 function Matching_Full_Source_Name
487 T : Time_Stamp_Type) return File_Name_Type;
488 -- Same semantics than Full_Source_Name but will search on the source path
489 -- until a source file with time stamp matching T is found. If none is
490 -- found returns No_File.
492 procedure Source_File_Data (Cache : Boolean);
493 -- By default source file data (full source file name and time stamp)
494 -- are looked up every time a call to Full_Source_Name (N) or
495 -- Source_File_Stamp (N) is made. This may be undesirable in certain
496 -- applications as this is uselessly slow if source file data does not
497 -- change during program execution. When this procedure is called with
498 -- Cache => True access to source file data does not incur a penalty if
499 -- this data was previously retrieved.
501 procedure Dump_Source_File_Names;
502 -- Prints out the names of all source files that have been read by
503 -- Read_Source_File, except those that come from the run-time library
504 -- (i.e. Include_Dir_Default_Prefix). The text is sent to whatever Output
505 -- is currently using (e.g. standard output or standard error).
507 -------------------------------------------
508 -- Representation of Library Information --
509 -------------------------------------------
511 -- Associated with each compiled source file is library information, a
512 -- string of bytes whose exact format is described in the body of Lib.Writ.
513 -- Compiling a source file generates this library information for the
514 -- compiled unit, and access the library information for units that were
515 -- compiled previously on which the unit being compiled depends.
517 -- How this information is stored is up to the implementation of this
518 -- package. At the interface level, this information is simply associated
519 -- with its corresponding source.
521 -- Several different implementations are possible:
523 -- 1. The information could be directly associated with the source file,
524 -- e.g. placed in a resource fork of this file on the Mac, or on
525 -- MS-DOS, written to the source file after the end of file mark.
527 -- 2. The information could be written into the generated object module
528 -- if the system supports the inclusion of arbitrary informational
529 -- byte streams into object files. In this case there must be a naming
530 -- convention that allows object files to be located given the name of
531 -- the corresponding source file.
533 -- 3. The information could be written to a separate file, whose name is
534 -- related to the name of the source file by a fixed convention.
536 -- Which of these three methods is chosen depends on the constraints of the
537 -- host operating system. The interface described here is independent of
538 -- which of these approaches is used. Currently all versions of GNAT use
539 -- the third approach with a file name of xxx.ali where xxx is the source
542 -------------------------------
543 -- Library Information Input --
544 -------------------------------
546 -- These subprograms are used by the binder to read library information
547 -- files, see section above for representation of these files.
549 function Read_Library_Info
550 (Lib_File : File_Name_Type;
551 Fatal_Err : Boolean := False) return Text_Buffer_Ptr;
552 -- Allocates a Text_Buffer of appropriate length and reads in the entire
553 -- source of the library information from the library information file
554 -- whose name is given by the parameter Name.
556 -- See description of Read_Source_File for details on the format of the
557 -- returned text buffer (the format is identical). The lower bound of
558 -- the Text_Buffer is always zero
560 -- If the specified file cannot be opened, then the action depends on
561 -- Fatal_Err. If Fatal_Err is True, an error message is given and the
562 -- compilation is abandoned. Otherwise if Fatal_Err is False, then null
563 -- is returned. Note that the Lib_File is a simple name which does not
564 -- include any directory information. The implementation is responsible
565 -- for searching for the file in appropriate directories.
567 -- If Opt.Check_Object_Consistency is set to True then this routine checks
568 -- whether the object file corresponding to the Lib_File is consistent with
569 -- it. The object file is inconsistent if the object does not exist or if
570 -- it has an older time stamp than Lib_File. This check is not performed
571 -- when the Lib_File is "locked" (i.e. read/only) because in this case the
572 -- object file may be buried in a library. In case of inconsistencies
573 -- Read_Library_Info behaves as if it did not find Lib_File (namely if
574 -- Fatal_Err is False, null is returned).
576 function Read_Library_Info_From_Full
577 (Full_Lib_File : File_Name_Type;
578 Lib_File_Attr : access File_Attributes;
579 Fatal_Err : Boolean := False) return Text_Buffer_Ptr;
580 -- Same as Read_Library_Info, except Full_Lib_File must contains the full
581 -- path to the library file (instead of having Read_Library_Info recompute
583 -- Lib_File_Attr should be an initialized set of attributes for the
584 -- library file (it can be initialized to Unknown_Attributes, but in
585 -- general will have been initialized by a previous call to Find_File).
587 function Full_Library_Info_Name return File_Name_Type;
588 function Full_Object_File_Name return File_Name_Type;
589 -- Returns the full name of the library/object file most recently read
590 -- using Read_Library_Info, including appropriate directory information.
591 -- Calling this routine entails no library file directory lookup
592 -- penalty. Note that the object file corresponding to a library file
593 -- is not actually read. Its time stamp is affected when the flag
594 -- Opt.Check_Object_Consistency is set.
596 function Current_Library_File_Stamp return Time_Stamp_Type;
597 function Current_Object_File_Stamp return Time_Stamp_Type;
598 -- The time stamps of the files returned by the previous two routines.
599 -- It is an error to call Current_Object_File_Stamp if
600 -- Opt.Check_Object_Consistency is set to False.
602 procedure Full_Lib_File_Name
604 Lib_File : out File_Name_Type;
605 Attr : out File_Attributes);
606 function Full_Lib_File_Name (N : File_Name_Type) return File_Name_Type;
607 -- Returns the full name of library file N. N should not include
608 -- path information. Note that if the file cannot be located No_File is
609 -- returned for the first routine and an all blank time stamp is returned
610 -- for the second (this is not an error situation). The full name includes
611 -- the appropriate directory information. The library file directory lookup
612 -- penalty is incurred every single time this routine is called.
613 -- The procedural version also returns some file attributes for the ALI
614 -- file (to save on system calls later on).
616 function Lib_File_Name
617 (Source_File : File_Name_Type;
618 Munit_Index : Nat := 0) return File_Name_Type;
619 -- Given the name of a source file, returns the name of the corresponding
620 -- library information file. This may be the name of the object file or of
621 -- a separate file used to store the library information. In the current
622 -- implementation, a separate file (the ALI file) is always used. In either
623 -- case the returned result is suitable for calling Read_Library_Info. The
624 -- Munit_Index is the unit index in multiple unit per file mode, or zero in
625 -- normal single unit per file mode (used to add ~nnn suffix). Note: this
626 -- subprogram is in this section because it is used by the compiler to
627 -- determine the proper library information names to be placed in the
628 -- generated library information file.
634 Current_Exit_Status : Integer := 0;
635 -- Exit status that is set with procedure OS_Exit_Through_Exception below
636 -- and can be used in exception handler for Types.Terminate_Program to call
637 -- Set_Exit_Status as the last action of the program.
639 procedure OS_Exit_Through_Exception (Status : Integer);
641 -- Set the Current_Exit_Status, then raise Types.Terminate_Program
643 type Exit_Code_Type is (
644 E_Success, -- No warnings or errors
645 E_Warnings, -- Compiler warnings generated
646 E_No_Code, -- No code generated
647 E_No_Compile, -- Compilation not needed (smart recompilation)
648 E_Errors, -- Compiler error messages generated
649 E_Fatal, -- Fatal (serious) error, e.g. source file not found
650 E_Abort); -- Internally detected compiler error
652 procedure Exit_Program (Exit_Code : Exit_Code_Type);
653 pragma No_Return (Exit_Program);
654 -- A call to Exit_Program terminates execution with the given status. A
655 -- status of zero indicates normal completion, a non-zero status indicates
656 -- abnormal termination.
658 -------------------------
659 -- Command Line Access --
660 -------------------------
662 -- Direct interface to command line parameters. (We don't want to use
663 -- the predefined command line package because it defines functions
666 function Arg_Count return Natural;
667 pragma Import (C, Arg_Count, "__gnat_arg_count");
668 -- Get number of arguments (note: optional globbing may be enabled)
670 procedure Fill_Arg (A : System.Address; Arg_Num : Integer);
671 pragma Import (C, Fill_Arg, "__gnat_fill_arg");
672 -- Store one argument
674 function Len_Arg (Arg_Num : Integer) return Integer;
675 pragma Import (C, Len_Arg, "__gnat_len_arg");
676 -- Get length of argument
678 ALI_Default_Suffix : constant String_Ptr := new String'("ali");
679 ALI_Suffix : String_Ptr := ALI_Default_Suffix;
680 -- The suffixes used for the library files (also known as ALI files)
684 Current_Main : File_Name_Type := No_File;
685 -- Used to save a simple file name between calls to Next_Main_Source and
686 -- Read_Source_File. If the file name argument to Read_Source_File is
687 -- No_File, that indicates that the file whose name was returned by the
688 -- last call to Next_Main_Source (and stored here) is to be read.
690 Target_Object_Suffix : constant String := Get_Target_Object_Suffix.all;
691 -- The suffix used for the target object files
693 Output_FD : File_Descriptor;
694 -- File descriptor for current library info, list, tree, or binder output
696 Output_File_Name : File_Name_Type;
697 -- File_Name_Type for name of open file whose FD is in Output_FD, the name
698 -- stored does not include the trailing NUL character.
700 Argument_Count : constant Integer := Arg_Count - 1;
701 -- Number of arguments (excluding program name)
703 type File_Name_Array is array (Int range <>) of String_Ptr;
704 type File_Name_Array_Ptr is access File_Name_Array;
705 File_Names : File_Name_Array_Ptr :=
706 new File_Name_Array (1 .. Int (Argument_Count) + 2);
707 -- As arguments are scanned, file names are stored in this array. The
708 -- strings do not have terminating NUL files. The array is extensible,
709 -- because when using project files, there may be more files than
710 -- arguments on the command line.
712 type File_Index_Array is array (Int range <>) of Int;
713 type File_Index_Array_Ptr is access File_Index_Array;
714 File_Indexes : File_Index_Array_Ptr :=
715 new File_Index_Array (1 .. Int (Argument_Count) + 2);
717 Current_File_Name_Index : Int := 0;
718 -- The index in File_Names of the last file opened by Next_Main_Source
719 -- or Next_Main_Lib_File. The value 0 indicates that no files have been
722 procedure Create_File_And_Check
723 (Fdesc : out File_Descriptor;
725 -- Create file whose name (NUL terminated) is in Name_Buffer (with the
726 -- length in Name_Len), and place the resulting descriptor in Fdesc. Issue
727 -- message and exit with fatal error if file cannot be created. The Fmode
728 -- parameter is set to either Text or Binary (for details see description
729 -- of System.OS_Lib.Create_File).
731 type Program_Type is (Compiler, Binder, Make, Gnatls, Unspecified);
732 -- Program currently running
733 procedure Set_Program (P : Program_Type);
734 -- Indicates to the body of Osint the program currently running. This
735 -- procedure is called by the child packages of Osint. A check is made
736 -- that this procedure is not called more than once.
738 function More_Files return Boolean;
739 -- Implements More_Source_Files and More_Lib_Files
741 function Next_Main_File return File_Name_Type;
742 -- Implements Next_Main_Source and Next_Main_Lib_File
744 function Object_File_Name (N : File_Name_Type) return File_Name_Type;
745 -- Constructs the name of the object file corresponding to library file N.
746 -- If N is a full file name than the returned file name will also be a full
747 -- file name. Note that no lookup in the library file directories is done
748 -- for this file. This routine merely constructs the name.
750 procedure Write_Info (Info : String);
751 -- Implementation of Write_Binder_Info, Write_Debug_Info and
752 -- Write_Library_Info (identical)
754 procedure Write_With_Check (A : Address; N : Integer);
755 -- Writes N bytes from buffer starting at address A to file whose FD is
756 -- stored in Output_FD, and whose file name is stored as a File_Name_Type
757 -- in Output_File_Name. A check is made for disk full, and if this is
758 -- detected, the file being written is deleted, and a fatal error is
761 File_Attributes_Size : constant Natural := 24;
762 -- This should be big enough to fit a "struct file_attributes" on any
763 -- system. It doesn't cause any malfunction if it is too big (which avoids
764 -- the need for either mapping the struct exactly or importing the sizeof
765 -- from C, which would result in dynamic code). However, it does waste
766 -- space (e.g. when a component of this type appears in a record, if it is
767 -- unnecessarily large).
769 type File_Attributes is
770 array (1 .. File_Attributes_Size)
771 of System.Storage_Elements.Storage_Element;
772 for File_Attributes'Alignment use Standard'Maximum_Alignment;
774 Unknown_Attributes : constant File_Attributes := (others => 0);
775 -- Will be initialized properly at elaboration (for efficiency later on,
776 -- avoid function calls every time we want to reset the attributes).