1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1998-2007, 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 with Ada.Characters.Conversions; use Ada.Characters.Conversions;
27 with Ada.Command_Line; use Ada.Command_Line;
28 with Ada.Directories; use Ada.Directories;
29 with Ada.Streams.Stream_IO; use Ada.Streams;
30 with Ada.Text_IO; use Ada.Text_IO;
31 with System.CRTL; use System; use System.CRTL;
33 with GNAT.Command_Line; use GNAT.Command_Line;
34 with GNAT.OS_Lib; use GNAT.OS_Lib;
35 with GNAT.Heap_Sort_G;
39 with Switch; use Switch;
44 Config_File_Name : constant String_Access := new String'("gnat.adc");
45 -- The name of the file holding the GNAT configuration pragmas
47 Gcc : String_Access := new String'("gcc");
48 -- May be modified by switch --GCC=
50 Gcc_Set : Boolean := False;
51 -- True if a switch --GCC= is used
53 Gnat_Cmd : String_Access;
54 -- Command to execute the GNAT compiler
56 Gnat_Args : Argument_List_Access :=
61 new String'("-gnats"),
62 new String'("-gnatu"));
63 -- Arguments used in Gnat_Cmd call
65 EOF : constant Character := Character'Val (26);
66 -- Special character to signal end of file. Not required in input
67 -- files, but properly treated if present. Not generated in output
68 -- files except as a result of copying input file.
74 subtype File_Num is Natural;
75 subtype File_Offset is Natural;
77 type File_Entry is record
79 -- Name of chop file or directory
81 SR_Name : String_Access;
82 -- Null unless the chop file starts with a source reference pragma
83 -- in which case this field points to the file name from this pragma.
86 package File is new GNAT.Table
87 (Table_Component_Type => File_Entry,
88 Table_Index_Type => File_Num,
91 Table_Increment => 100);
93 Directory : String_Access;
94 -- Record name of directory, or a null string if no directory given
96 Compilation_Mode : Boolean := False;
97 Overwrite_Files : Boolean := False;
98 Preserve_Mode : Boolean := False;
99 Quiet_Mode : Boolean := False;
100 Source_References : Boolean := False;
101 Verbose_Mode : Boolean := False;
102 Exit_On_Error : Boolean := False;
105 Write_gnat_adc : Boolean := False;
106 -- Gets set true if we append to gnat.adc or create a new gnat.adc.
107 -- Used to inhibit complaint about no units generated.
113 type Line_Num is new Natural;
114 -- Line number (for source reference pragmas)
116 type Unit_Count_Type is new Integer;
117 subtype Unit_Num is Unit_Count_Type range 1 .. Unit_Count_Type'Last;
118 -- Used to refer to unit number in unit table
120 type SUnit_Num is new Integer;
121 -- Used to refer to entry in sorted units table. Note that entry
122 -- zero is only for use by Heapsort, and is not otherwise referenced.
124 type Unit_Kind is (Unit_Spec, Unit_Body, Config_Pragmas);
126 -- Structure to contain all necessary information for one unit.
127 -- Entries are also temporarily used to record config pragma sequences.
129 type Unit_Info is record
130 File_Name : String_Access;
131 -- File name from GNAT output line
133 Chop_File : File_Num;
134 -- File number in chop file sequence
136 Start_Line : Line_Num;
137 -- Line number from GNAT output line
139 Offset : File_Offset;
140 -- Offset name from GNAT output line
142 SR_Present : Boolean;
143 -- Set True if SR parameter present
145 Length : File_Offset;
146 -- A length of 0 means that the Unit is the last one in the file
149 -- Indicates kind of unit
151 Sorted_Index : SUnit_Num;
152 -- Index of unit in sorted unit list
154 Bufferg : String_Access;
155 -- Pointer to buffer containing configuration pragmas to be
156 -- prepended. Null if no pragmas to be prepended.
159 -- The following table stores the unit offset information
161 package Unit is new GNAT.Table
162 (Table_Component_Type => Unit_Info,
163 Table_Index_Type => Unit_Count_Type,
164 Table_Low_Bound => 1,
165 Table_Initial => 500,
166 Table_Increment => 100);
168 -- The following table is used as a sorted index to the Unit.Table.
169 -- The entries in Unit.Table are not moved, instead we just shuffle
170 -- the entries in Sorted_Units. Note that the zeroeth entry in this
171 -- table is used by GNAT.Heap_Sort_G.
173 package Sorted_Units is new GNAT.Table
174 (Table_Component_Type => Unit_Num,
175 Table_Index_Type => SUnit_Num,
176 Table_Low_Bound => 0,
177 Table_Initial => 500,
178 Table_Increment => 100);
180 function Is_Duplicated (U : SUnit_Num) return Boolean;
181 -- Returns true if U is duplicated by a later unit.
182 -- Note that this function returns false for the last entry.
184 procedure Sort_Units;
185 -- Sort units and set up sorted unit table
187 ----------------------
188 -- File_Descriptors --
189 ----------------------
191 function dup (handle : File_Descriptor) return File_Descriptor;
192 function dup2 (from, to : File_Descriptor) return File_Descriptor;
194 ---------------------
195 -- Local variables --
196 ---------------------
198 Warning_Count : Natural := 0;
199 -- Count of warnings issued so far
201 -----------------------
202 -- Local subprograms --
203 -----------------------
205 procedure Error_Msg (Message : String; Warning : Boolean := False);
206 -- Produce an error message on standard error output
208 procedure File_Time_Stamp (Name : C_File_Name; Time : OS_Time);
209 -- Given the name of a file or directory, Name, set the
210 -- time stamp. This function must be used for an unopened file.
212 function Files_Exist return Boolean;
213 -- Check Unit.Table for possible file names that already exist
214 -- in the file system. Returns true if files exist, False otherwise
216 function Get_Maximum_File_Name_Length return Integer;
217 pragma Import (C, Get_Maximum_File_Name_Length,
218 "__gnat_get_maximum_file_name_length");
219 -- Function to get maximum file name length for system
221 Maximum_File_Name_Length : constant Integer := Get_Maximum_File_Name_Length;
222 Maximum_File_Name_Length_String : constant String :=
224 (Maximum_File_Name_Length);
226 function Locate_Executable
227 (Program_Name : String;
228 Look_For_Prefix : Boolean := True) return String_Access;
229 -- Locate executable for given program name. This takes into account
230 -- the target-prefix of the current command, if Look_For_Prefix is True.
232 subtype EOL_Length is Natural range 0 .. 2;
233 -- Possible lengths of end of line sequence
235 type EOL_String (Len : EOL_Length := 0) is record
236 Str : String (1 .. Len);
240 (Source : not null access String;
241 Start : Positive) return EOL_String;
242 -- Return the line terminator used in the passed string
245 (Source : not null access String;
246 Ptr : in out Positive);
247 -- On return Source (Ptr) is the first character of the next line
248 -- or EOF. Source.all must be terminated by EOF.
250 function Parse_File (Num : File_Num) return Boolean;
251 -- Calls the GNAT compiler to parse the given source file and parses the
252 -- output using Parse_Offset_Info. Returns True if parse operation
253 -- completes, False if some system error (e.g. failure to read the
254 -- offset information) occurs.
256 procedure Parse_Offset_Info
257 (Chop_File : File_Num;
258 Source : not null access String);
259 -- Parses the output of the compiler indicating the offsets
260 -- and names of the compilation units in Chop_File.
262 procedure Parse_Token
263 (Source : not null access String;
264 Ptr : in out Positive;
265 Token_Ptr : out Positive);
266 -- Skips any separators and stores the start of the token in Token_Ptr.
267 -- Then stores the position of the next separator in Ptr.
268 -- On return Source (Token_Ptr .. Ptr - 1) is the token.
271 (FD : File_Descriptor;
272 Contents : out String_Access;
273 Success : out Boolean);
274 -- Reads file associated with FS into the newly allocated
276 -- [VMS] Success is true iff the number of bytes read is less than or
277 -- equal to the file size.
278 -- [Other] Success is true iff the number of bytes read is equal to
281 function Report_Duplicate_Units return Boolean;
282 -- Output messages about duplicate units in the input files in Unit.Table
283 -- Returns True if any duplicates found, Fals if no duplicates found.
285 function Scan_Arguments return Boolean;
286 -- Scan command line options and set global variables accordingly.
287 -- Also scan out file and directory arguments. Returns True if scan
288 -- was successful, and False if the scan fails for any reason.
291 -- Output message on standard output describing syntax of gnatchop command
293 procedure Warning_Msg (Message : String);
294 -- Output a warning message on standard error and update warning count
296 function Write_Chopped_Files (Input : File_Num) return Boolean;
297 -- Write all units that result from chopping the Input file
299 procedure Write_Config_File (Input : File_Num; U : Unit_Num);
300 -- Call to write configuration pragmas (append them to gnat.adc)
301 -- Input is the file number for the chop file and U identifies the
302 -- unit entry for the configuration pragmas.
304 function Get_Config_Pragmas
306 U : Unit_Num) return String_Access;
307 -- Call to read configuration pragmas from given unit entry, and
308 -- return a buffer containing the pragmas to be appended to
309 -- following units. Input is the file number for the chop file and
310 -- U identifies the unit entry for the configuration pragmas.
312 procedure Write_Source_Reference_Pragma
315 File : Stream_IO.File_Type;
317 Success : in out Boolean);
318 -- If Success is True on entry, writes a source reference pragma using
319 -- the chop file from Info, and the given line number. On return Success
320 -- indicates whether the write succeeded. If Success is False on entry,
321 -- or if the global flag Source_References is False, then the call to
322 -- Write_Source_Reference_Pragma has no effect. EOL indicates the end
323 -- of line sequence to be written at the end of the pragma.
326 (Source : not null access String;
329 Success : out Boolean);
330 -- Write one compilation unit of the source to file
336 function dup (handle : File_Descriptor) return File_Descriptor is
338 return File_Descriptor (System.CRTL.dup (int (handle)));
345 function dup2 (from, to : File_Descriptor) return File_Descriptor is
347 return File_Descriptor (System.CRTL.dup2 (int (from), int (to)));
354 procedure Error_Msg (Message : String; Warning : Boolean := False) is
356 Put_Line (Standard_Error, Message);
359 Set_Exit_Status (Failure);
361 if Exit_On_Error then
362 raise Types.Terminate_Program;
367 ---------------------
368 -- File_Time_Stamp --
369 ---------------------
371 procedure File_Time_Stamp (Name : C_File_Name; Time : OS_Time) is
372 procedure Set_File_Time (Name : C_File_Name; Time : OS_Time);
373 pragma Import (C, Set_File_Time, "__gnat_set_file_time_name");
376 Set_File_Time (Name, Time);
383 function Files_Exist return Boolean is
384 Exists : Boolean := False;
387 for SNum in 1 .. SUnit_Num (Unit.Last) loop
389 -- Only check and report for the last instance of duplicated files
391 if not Is_Duplicated (SNum) then
393 Info : constant Unit_Info :=
394 Unit.Table (Sorted_Units.Table (SNum));
397 if Is_Writable_File (Info.File_Name.all) then
398 if Hostparm.OpenVMS then
401 & " already exists, use /OVERWRITE to overwrite");
403 Error_Msg (Info.File_Name.all
404 & " already exists, use -w to overwrite");
416 ------------------------
417 -- Get_Config_Pragmas --
418 ------------------------
420 function Get_Config_Pragmas
425 Info : Unit_Info renames Unit.Table (U);
426 FD : File_Descriptor;
427 Name : aliased constant String :=
428 File.Table (Input).Name.all & ASCII.Nul;
429 Length : File_Offset;
430 Buffer : String_Access;
432 Result : String_Access;
435 FD := Open_Read (Name'Address, Binary);
437 if FD = Invalid_FD then
438 Error_Msg ("cannot open " & File.Table (Input).Name.all);
442 Read_File (FD, Buffer, Success);
444 -- A length of 0 indicates that the rest of the file belongs to
445 -- this unit. The actual length must be calculated now. Take into
446 -- account that the last character (EOF) must not be written.
448 if Info.Length = 0 then
449 Length := Buffer'Last - (Buffer'First + Info.Offset);
451 Length := Info.Length;
454 Result := new String'(Buffer (1 .. Length));
457 end Get_Config_Pragmas;
464 (Source : not null access String;
468 Ptr : Positive := Start;
473 -- Skip to end of line
475 while Source (Ptr) /= ASCII.CR and then
476 Source (Ptr) /= ASCII.LF and then
484 if Source (Ptr) /= EOF then
494 -- Recognize CR/LF or LF/CR combination
496 if (Source (Ptr + 1) = ASCII.CR or Source (Ptr + 1) = ASCII.LF)
497 and then Source (Ptr) /= Source (Ptr + 1)
502 return (Len => Last + 1 - First, Str => Source (First .. Last));
509 function Is_Duplicated (U : SUnit_Num) return Boolean is
511 return U < SUnit_Num (Unit.Last)
513 Unit.Table (Sorted_Units.Table (U)).File_Name.all =
514 Unit.Table (Sorted_Units.Table (U + 1)).File_Name.all;
517 -----------------------
518 -- Locate_Executable --
519 -----------------------
521 function Locate_Executable
522 (Program_Name : String;
523 Look_For_Prefix : Boolean := True) return String_Access
525 Current_Command : constant String := Normalize_Pathname (Command_Name);
526 End_Of_Prefix : Natural;
527 Start_Of_Prefix : Positive;
528 Result : String_Access;
531 Start_Of_Prefix := Current_Command'First;
532 End_Of_Prefix := Start_Of_Prefix - 1;
534 if Look_For_Prefix then
536 -- Find Start_Of_Prefix
538 for J in reverse Current_Command'Range loop
539 if Current_Command (J) = '/' or
540 Current_Command (J) = Directory_Separator or
541 Current_Command (J) = ':'
543 Start_Of_Prefix := J + 1;
548 -- Find End_Of_Prefix
550 for J in reverse Start_Of_Prefix .. Current_Command'Last loop
551 if Current_Command (J) = '-' then
559 Command : constant String :=
560 Current_Command (Start_Of_Prefix .. End_Of_Prefix) &
563 Result := Locate_Exec_On_Path (Command);
565 if Result = null then
567 (Command & ": installation problem, executable not found");
572 end Locate_Executable;
579 (Source : not null access String;
580 Ptr : in out Positive) is
582 -- Skip to end of line
584 while Source (Ptr) /= ASCII.CR and then Source (Ptr) /= ASCII.LF
585 and then Source (Ptr) /= EOF
590 if Source (Ptr) /= EOF then
591 Ptr := Ptr + 1; -- skip CR or LF
594 -- Skip past CR/LF or LF/CR combination
596 if (Source (Ptr) = ASCII.CR or Source (Ptr) = ASCII.LF)
597 and then Source (Ptr) /= Source (Ptr - 1)
607 function Parse_File (Num : File_Num) return Boolean is
608 Chop_Name : constant String_Access := File.Table (Num).Name;
609 Save_Stdout : constant File_Descriptor := dup (Standout);
610 Offset_Name : Temp_File_Name;
611 Offset_FD : File_Descriptor;
612 Buffer : String_Access;
617 -- Display copy of GNAT command if verbose mode
622 for J in 1 .. Gnat_Args'Length loop
624 Put (Gnat_Args (J).all);
628 Put_Line (Chop_Name.all);
631 -- Create temporary file
633 Create_Temp_File (Offset_FD, Offset_Name);
635 if Offset_FD = Invalid_FD then
636 Error_Msg ("gnatchop: cannot create temporary file");
641 -- Redirect Stdout to this temporary file in the Unix way
643 if dup2 (Offset_FD, Standout) = Invalid_FD then
644 Error_Msg ("gnatchop: cannot redirect stdout to temporary file");
650 -- Call Gnat on the source filename argument with special options
651 -- to generate offset information. If this special compilation completes
652 -- successfully then we can do the actual gnatchop operation.
654 Spawn (Gnat_Cmd.all, Gnat_Args.all & Chop_Name, Success);
657 Error_Msg (Chop_Name.all & ": parse errors detected");
658 Error_Msg (Chop_Name.all & ": chop may not be successful");
663 if dup2 (Save_Stdout, Standout) = Invalid_FD then
664 Error_Msg ("gnatchop: cannot restore stdout");
667 -- Reopen the file to start reading from the beginning
671 Offset_FD := Open_Read (Offset_Name'Address, Binary);
673 if Offset_FD = Invalid_FD then
674 Error_Msg ("gnatchop: cannot access offset info");
678 Read_File (Offset_FD, Buffer, Success);
681 Error_Msg ("gnatchop: error reading offset info");
685 Parse_Offset_Info (Num, Buffer);
688 -- Close and delete temporary file
691 Delete_File (Offset_Name'Address, Success);
696 when Failure | Types.Terminate_Program =>
698 Delete_File (Offset_Name'Address, Success);
703 -----------------------
704 -- Parse_Offset_Info --
705 -----------------------
707 procedure Parse_Offset_Info
708 (Chop_File : File_Num;
709 Source : not null access String)
711 First_Unit : constant Unit_Num := Unit.Last + 1;
712 Bufferg : String_Access := null;
713 Parse_Ptr : File_Offset := Source'First;
714 Token_Ptr : File_Offset;
717 function Match (Literal : String) return Boolean;
718 -- Checks if given string appears at the current Token_Ptr location
719 -- and if so, bumps Parse_Ptr past the token and returns True. If
720 -- the string is not present, sets Parse_Ptr to Token_Ptr and
727 function Match (Literal : String) return Boolean is
729 Parse_Token (Source, Parse_Ptr, Token_Ptr);
731 if Source'Last + 1 - Token_Ptr < Literal'Length
733 Source (Token_Ptr .. Token_Ptr + Literal'Length - 1) /= Literal
735 Parse_Ptr := Token_Ptr;
739 Parse_Ptr := Token_Ptr + Literal'Length;
743 -- Start of processing for Parse_Offset_Info
747 -- Set default values, should get changed for all
748 -- units/pragmas except for the last
750 Info.Chop_File := Chop_File;
753 -- Parse the current line of offset information into Info
754 -- and exit the loop if there are any errors or on EOF.
756 -- First case, parse a line in the following format:
758 -- Unit x (spec) line 7, file offset 142, [SR, ]file name x.ads
760 -- Note that the unit name can be an operator name in quotes.
761 -- This is of course illegal, but both GNAT and gnatchop handle
762 -- the case so that this error does not intefere with chopping.
764 -- The SR ir present indicates that a source reference pragma
765 -- was processed as part of this unit (and that therefore no
766 -- Source_Reference pragma should be generated.
768 if Match ("Unit") then
769 Parse_Token (Source, Parse_Ptr, Token_Ptr);
771 if Match ("(body)") then
772 Info.Kind := Unit_Body;
773 elsif Match ("(spec)") then
774 Info.Kind := Unit_Spec;
779 exit when not Match ("line");
780 Parse_Token (Source, Parse_Ptr, Token_Ptr);
781 Info.Start_Line := Line_Num'Value
782 (Source (Token_Ptr .. Parse_Ptr - 1));
784 exit when not Match ("file offset");
785 Parse_Token (Source, Parse_Ptr, Token_Ptr);
786 Info.Offset := File_Offset'Value
787 (Source (Token_Ptr .. Parse_Ptr - 1));
789 Info.SR_Present := Match ("SR, ");
791 exit when not Match ("file name");
792 Parse_Token (Source, Parse_Ptr, Token_Ptr);
793 Info.File_Name := new String'
794 (Directory.all & Source (Token_Ptr .. Parse_Ptr - 1));
795 Parse_EOL (Source, Parse_Ptr);
797 -- Second case, parse a line of the following form
799 -- Configuration pragmas at line 10, file offset 223
801 elsif Match ("Configuration pragmas at") then
802 Info.Kind := Config_Pragmas;
803 Info.File_Name := Config_File_Name;
805 exit when not Match ("line");
806 Parse_Token (Source, Parse_Ptr, Token_Ptr);
807 Info.Start_Line := Line_Num'Value
808 (Source (Token_Ptr .. Parse_Ptr - 1));
810 exit when not Match ("file offset");
811 Parse_Token (Source, Parse_Ptr, Token_Ptr);
812 Info.Offset := File_Offset'Value
813 (Source (Token_Ptr .. Parse_Ptr - 1));
815 Parse_EOL (Source, Parse_Ptr);
817 -- Third case, parse a line of the following form
819 -- Source_Reference pragma for file "filename"
821 -- This appears at the start of the file only, and indicates
822 -- the name to be used on any generated Source_Reference pragmas.
824 elsif Match ("Source_Reference pragma for file ") then
825 Parse_Token (Source, Parse_Ptr, Token_Ptr);
826 File.Table (Chop_File).SR_Name :=
827 new String'(Source (Token_Ptr + 1 .. Parse_Ptr - 2));
828 Parse_EOL (Source, Parse_Ptr);
831 -- Unrecognized keyword or end of file
837 -- Store the data in the Info record in the Unit.Table
840 Unit.Table (Unit.Last) := Info;
842 -- If this is not the first unit from the file, calculate
843 -- the length of the previous unit as difference of the offsets
845 if Unit.Last > First_Unit then
846 Unit.Table (Unit.Last - 1).Length :=
847 Info.Offset - Unit.Table (Unit.Last - 1).Offset;
850 -- If not in compilation mode combine current unit with any
851 -- preceding configuration pragmas.
853 if not Compilation_Mode
854 and then Unit.Last > First_Unit
855 and then Unit.Table (Unit.Last - 1).Kind = Config_Pragmas
857 Info.Start_Line := Unit.Table (Unit.Last - 1).Start_Line;
858 Info.Offset := Unit.Table (Unit.Last - 1).Offset;
860 -- Delete the configuration pragma entry
862 Unit.Table (Unit.Last - 1) := Info;
866 -- If in compilation mode, and previous entry is the initial
867 -- entry for the file and is for configuration pragmas, then
868 -- they are to be appended to every unit in the file.
871 and then Unit.Last = First_Unit + 1
872 and then Unit.Table (First_Unit).Kind = Config_Pragmas
876 (Unit.Table (Unit.Last - 1).Chop_File, First_Unit);
877 Unit.Table (Unit.Last - 1) := Info;
881 Unit.Table (Unit.Last).Bufferg := Bufferg;
883 -- If in compilation mode, and this is not the first item,
884 -- combine configuration pragmas with previous unit, which
885 -- will cause an error message to be generated when the unit
889 and then Unit.Last > First_Unit
890 and then Unit.Table (Unit.Last).Kind = Config_Pragmas
900 -- Find out if the loop was exited prematurely because of
901 -- an error or if the EOF marker was found.
903 if Source (Parse_Ptr) /= EOF then
905 (File.Table (Chop_File).Name.all & ": error parsing offset info");
909 -- Handle case of a chop file consisting only of config pragmas
911 if Unit.Last = First_Unit
912 and then Unit.Table (Unit.Last).Kind = Config_Pragmas
914 -- In compilation mode, we append such a file to gnat.adc
916 if Compilation_Mode then
917 Write_Config_File (Unit.Table (Unit.Last).Chop_File, First_Unit);
920 -- In default (non-compilation) mode, this is invalid
924 (File.Table (Chop_File).Name.all &
925 ": no units found (only pragmas)");
930 -- Handle case of a chop file ending with config pragmas. This can
931 -- happen only in default non-compilation mode, since in compilation
932 -- mode such configuration pragmas are part of the preceding unit.
933 -- We simply concatenate such pragmas to the previous file which
934 -- will cause a compilation error, which is appropriate.
936 if Unit.Last > First_Unit
937 and then Unit.Table (Unit.Last).Kind = Config_Pragmas
941 end Parse_Offset_Info;
947 procedure Parse_Token
948 (Source : not null access String;
949 Ptr : in out Positive;
950 Token_Ptr : out Positive)
952 In_Quotes : Boolean := False;
957 while Source (Ptr) = ' ' or Source (Ptr) = ',' loop
965 while (In_Quotes or else not (Source (Ptr) = ' ' or Source (Ptr) = ','))
966 and then Source (Ptr) >= ' '
968 if Source (Ptr) = '"' then
969 In_Quotes := not In_Quotes;
981 (FD : File_Descriptor;
982 Contents : out String_Access;
983 Success : out Boolean)
985 Length : constant File_Offset := File_Offset (File_Length (FD));
986 -- Include room for EOF char
987 Buffer : constant String_Access := new String (1 .. Length + 1);
990 Read_Ptr : File_Offset := 1;
995 This_Read := Read (FD,
996 A => Buffer (Read_Ptr)'Address,
997 N => Length + 1 - Read_Ptr);
998 Read_Ptr := Read_Ptr + Integer'Max (This_Read, 0);
999 exit when This_Read <= 0;
1002 Buffer (Read_Ptr) := EOF;
1003 Contents := new String (1 .. Read_Ptr);
1004 Contents.all := Buffer (1 .. Read_Ptr);
1006 -- Things aren't simple on VMS due to the plethora of file types
1007 -- and organizations. It seems clear that there shouldn't be more
1008 -- bytes read than are contained in the file though.
1010 if Hostparm.OpenVMS then
1011 Success := Read_Ptr <= Length + 1;
1013 Success := Read_Ptr = Length + 1;
1017 ----------------------------
1018 -- Report_Duplicate_Units --
1019 ----------------------------
1021 function Report_Duplicate_Units return Boolean is
1025 Duplicates : Boolean := False;
1029 while US < SUnit_Num (Unit.Last) loop
1030 U := Sorted_Units.Table (US);
1032 if Is_Duplicated (US) then
1035 -- Move to last two versions of duplicated file to make it clearer
1036 -- to understand which file is retained in case of overwriting.
1038 while US + 1 < SUnit_Num (Unit.Last) loop
1039 exit when not Is_Duplicated (US + 1);
1043 U := Sorted_Units.Table (US);
1045 if Overwrite_Files then
1046 Warning_Msg (Unit.Table (U).File_Name.all
1047 & " is duplicated (all but last will be skipped)");
1049 elsif Unit.Table (U).Chop_File =
1050 Unit.Table (Sorted_Units.Table (US + 1)).Chop_File
1052 Error_Msg (Unit.Table (U).File_Name.all
1053 & " is duplicated in "
1054 & File.Table (Unit.Table (U).Chop_File).Name.all);
1057 Error_Msg (Unit.Table (U).File_Name.all
1059 & File.Table (Unit.Table (U).Chop_File).Name.all
1060 & " is duplicated in "
1063 (Sorted_Units.Table (US + 1)).Chop_File).Name.all);
1070 if Duplicates and not Overwrite_Files then
1071 if Hostparm.OpenVMS then
1073 ("use /OVERWRITE to overwrite files and keep last version");
1075 Put_Line ("use -w to overwrite files and keep last version");
1080 end Report_Duplicate_Units;
1082 --------------------
1083 -- Scan_Arguments --
1084 --------------------
1086 function Scan_Arguments return Boolean is
1087 Kset : Boolean := False;
1088 -- Set true if -k switch found
1091 Initialize_Option_Scan;
1093 -- Scan options first
1096 case Getopt ("c gnat? h k? p q r v w x -GCC=!") is
1101 Gcc := new String'(Parameter);
1105 Compilation_Mode := True;
1109 new Argument_List'(Gnat_Args.all &
1110 new String'("-gnat" & Parameter));
1114 raise Types.Terminate_Program;
1118 Param : String_Access := new String'(Parameter);
1121 if Param.all /= "" then
1122 for J in Param'Range loop
1123 if Param (J) not in '0' .. '9' then
1124 if Hostparm.OpenVMS then
1125 Error_Msg ("/FILE_NAME_MAX_LENGTH=nnn" &
1126 " requires numeric parameter");
1128 Error_Msg ("-k# requires numeric parameter");
1136 if Hostparm.OpenVMS then
1137 Param := new String'("39");
1139 Param := new String'("8");
1144 new Argument_List'(Gnat_Args.all &
1145 new String'("-gnatk" & Param.all));
1150 Preserve_Mode := True;
1156 Source_References := True;
1159 Verbose_Mode := True;
1160 Display_Version ("GNATCHOP", "1998");
1163 Overwrite_Files := True;
1166 Exit_On_Error := True;
1173 if not Kset and then Maximum_File_Name_Length > 0 then
1175 -- If this system has restricted filename lengths, tell gnat1
1176 -- about them, removing the leading blank from the image string.
1179 new Argument_List'(Gnat_Args.all
1180 & new String'("-gnatk"
1181 & Maximum_File_Name_Length_String
1182 (Maximum_File_Name_Length_String'First + 1
1183 .. Maximum_File_Name_Length_String'Last)));
1190 S : constant String := Get_Argument (Do_Expansion => True);
1194 File.Increment_Last;
1195 File.Table (File.Last).Name := new String'(S);
1196 File.Table (File.Last).SR_Name := null;
1200 -- Case of more than one file where last file is a directory
1203 and then Is_Directory (File.Table (File.Last).Name.all)
1205 Directory := File.Table (File.Last).Name;
1206 File.Decrement_Last;
1208 -- Make sure Directory is terminated with a directory separator,
1209 -- so we can generate the output by just appending a filename.
1211 if Directory (Directory'Last) /= Directory_Separator
1212 and then Directory (Directory'Last) /= '/'
1214 Directory := new String'(Directory.all & Directory_Separator);
1217 -- At least one filename must be given
1219 elsif File.Last = 0 then
1223 -- No directory given, set directory to null, so that we can just
1224 -- concatenate the directory name to the file name unconditionally.
1227 Directory := new String'("");
1230 -- Finally check all filename arguments
1232 for File_Num in 1 .. File.Last loop
1234 F : constant String := File.Table (File_Num).Name.all;
1238 if Is_Directory (F) then
1239 Error_Msg (F & " is a directory, cannot be chopped");
1242 elsif not Is_Regular_File (F) then
1243 Error_Msg (F & " not found");
1252 when Invalid_Switch =>
1253 Error_Msg ("invalid switch " & Full_Switch);
1256 when Invalid_Parameter =>
1257 if Hostparm.OpenVMS then
1258 Error_Msg ("/FILE_NAME_MAX_LENGTH=nnn qualifier" &
1259 " requires numeric parameter");
1261 Error_Msg ("-k switch requires numeric parameter");
1272 procedure Sort_Units is
1274 procedure Move (From : Natural; To : Natural);
1275 -- Procedure used to sort the unit list
1276 -- Unit.Table (To) := Unit_List (From); used by sort
1278 function Lt (Left, Right : Natural) return Boolean;
1279 -- Compares Left and Right units based on file name (first),
1280 -- Chop_File (second) and Offset (third). This ordering is
1281 -- important to keep the last version in case of duplicate files.
1283 package Unit_Sort is new GNAT.Heap_Sort_G (Move, Lt);
1284 -- Used for sorting on filename to detect duplicates
1290 function Lt (Left, Right : Natural) return Boolean is
1291 L : Unit_Info renames
1292 Unit.Table (Sorted_Units.Table (SUnit_Num (Left)));
1294 R : Unit_Info renames
1295 Unit.Table (Sorted_Units.Table (SUnit_Num (Right)));
1298 return L.File_Name.all < R.File_Name.all
1299 or else (L.File_Name.all = R.File_Name.all
1300 and then (L.Chop_File < R.Chop_File
1301 or else (L.Chop_File = R.Chop_File
1302 and then L.Offset < R.Offset)));
1309 procedure Move (From : Natural; To : Natural) is
1311 Sorted_Units.Table (SUnit_Num (To)) :=
1312 Sorted_Units.Table (SUnit_Num (From));
1315 -- Start of processing for Sort_Units
1318 Sorted_Units.Set_Last (SUnit_Num (Unit.Last));
1320 for J in 1 .. Unit.Last loop
1321 Sorted_Units.Table (SUnit_Num (J)) := J;
1324 -- Sort Unit.Table, using Sorted_Units.Table (0) as scratch
1326 Unit_Sort.Sort (Natural (Unit.Last));
1328 -- Set the Sorted_Index fields in the unit tables
1330 for J in 1 .. SUnit_Num (Unit.Last) loop
1331 Unit.Table (Sorted_Units.Table (J)).Sorted_Index := J;
1342 ("Usage: gnatchop [-c] [-h] [-k#] " &
1343 "[-r] [-p] [-q] [-v] [-w] [-x] [--GCC=xx] file [file ...] [dir]");
1347 (" -c compilation mode, configuration pragmas " &
1351 (" -gnatxxx passes the -gnatxxx switch to gnat parser");
1354 (" -h help: output this usage information");
1357 (" -k# krunch file names of generated files to " &
1358 "no more than # characters");
1361 (" -k krunch file names of generated files to " &
1362 "no more than 8 characters");
1365 (" -p preserve time stamp, output files will " &
1366 "have same stamp as input");
1369 (" -q quiet mode, no output of generated file " &
1373 (" -r generate Source_Reference pragmas refer" &
1374 "encing original source file");
1377 (" -v verbose mode, output version and generat" &
1381 (" -w overwrite existing filenames");
1384 (" -x exit on error");
1387 (" --GCC=xx specify the path of the gnat parser to be used");
1391 (" file... list of source files to be chopped");
1394 (" dir directory location for split files (defa" &
1395 "ult = current directory)");
1402 procedure Warning_Msg (Message : String) is
1404 Warning_Count := Warning_Count + 1;
1405 Put_Line (Standard_Error, "warning: " & Message);
1408 -------------------------
1409 -- Write_Chopped_Files --
1410 -------------------------
1412 function Write_Chopped_Files (Input : File_Num) return Boolean is
1413 Name : aliased constant String :=
1414 File.Table (Input).Name.all & ASCII.Nul;
1415 FD : File_Descriptor;
1416 Buffer : String_Access;
1421 FD := Open_Read (Name'Address, Binary);
1422 TS_Time := File_Time_Stamp (FD);
1424 if FD = Invalid_FD then
1425 Error_Msg ("cannot open " & File.Table (Input).Name.all);
1429 Read_File (FD, Buffer, Success);
1432 Error_Msg ("cannot read " & File.Table (Input).Name.all);
1437 if not Quiet_Mode then
1438 Put_Line ("splitting " & File.Table (Input).Name.all & " into:");
1441 -- Only chop those units that come from this file
1443 for Num in 1 .. Unit.Last loop
1444 if Unit.Table (Num).Chop_File = Input then
1445 Write_Unit (Buffer, Num, TS_Time, Success);
1446 exit when not Success;
1452 end Write_Chopped_Files;
1454 -----------------------
1455 -- Write_Config_File --
1456 -----------------------
1458 procedure Write_Config_File (Input : File_Num; U : Unit_Num) is
1459 FD : File_Descriptor;
1460 Name : aliased constant String := "gnat.adc" & ASCII.NUL;
1461 Buffer : String_Access;
1464 Buffera : String_Access;
1468 Write_gnat_adc := True;
1469 FD := Open_Read_Write (Name'Address, Binary);
1471 if FD = Invalid_FD then
1472 FD := Create_File (Name'Address, Binary);
1475 if not Quiet_Mode then
1476 Put_Line ("writing configuration pragmas from " &
1477 File.Table (Input).Name.all & " to gnat.adc");
1483 if not Quiet_Mode then
1485 ("appending configuration pragmas from " &
1486 File.Table (Input).Name.all & " to gnat.adc");
1490 Success := FD /= Invalid_FD;
1493 Error_Msg ("cannot create gnat.adc");
1497 -- In append mode, acquire existing gnat.adc file
1500 Read_File (FD, Buffera, Success);
1503 Error_Msg ("cannot read gnat.adc");
1507 -- Find location of EOF byte if any to exclude from append
1510 while Bufferl <= Buffera'Last
1511 and then Buffera (Bufferl) /= EOF
1513 Bufferl := Bufferl + 1;
1516 Bufferl := Bufferl - 1;
1519 -- Write existing gnat.adc to new gnat.adc file
1521 FD := Create_File (Name'Address, Binary);
1522 Success := Write (FD, Buffera (1)'Address, Bufferl) = Bufferl;
1525 Error_Msg ("error writing gnat.adc");
1530 Buffer := Get_Config_Pragmas (Input, U);
1532 if Buffer /= null then
1533 Success := Write (FD, Buffer.all'Address, Buffer'Length) =
1537 Error_Msg ("disk full writing gnat.adc");
1543 end Write_Config_File;
1545 -----------------------------------
1546 -- Write_Source_Reference_Pragma --
1547 -----------------------------------
1549 procedure Write_Source_Reference_Pragma
1552 File : Stream_IO.File_Type;
1554 Success : in out Boolean)
1556 FTE : File_Entry renames Gnatchop.File.Table (Info.Chop_File);
1557 Nam : String_Access;
1560 if Success and Source_References and not Info.SR_Present then
1561 if FTE.SR_Name /= null then
1568 Reference : String :=
1569 "pragma Source_Reference (000000, """
1570 & Nam.all & """);" & EOL.Str;
1572 Pos : Positive := Reference'First;
1573 Lin : Line_Num := Line;
1576 while Reference (Pos + 1) /= ',' loop
1580 while Reference (Pos) = '0' loop
1581 Reference (Pos) := Character'Val
1582 (Character'Pos ('0') + Lin mod 10);
1587 -- Assume there are enough zeroes for any program length
1589 pragma Assert (Lin = 0);
1592 String'Write (Stream_IO.Stream (File), Reference);
1600 end Write_Source_Reference_Pragma;
1606 procedure Write_Unit
1607 (Source : not null access String;
1610 Success : out Boolean)
1613 procedure OS_Filename
1615 W_Name : Wide_String;
1617 N_Length : access Natural;
1619 E_Length : access Natural);
1620 pragma Import (C, OS_Filename, "__gnat_os_filename");
1621 -- Returns in OS_Name the proper name for the OS when used with the
1622 -- returned Encoding value. For example on Windows this will return the
1623 -- UTF-8 encoded name into OS_Name and set Encoding to encoding=utf8
1624 -- (form parameter Stream_IO).
1625 -- Name is the filename and W_Name the same filename in Unicode 16 bits
1626 -- (this corresponds to Win32 Unicode ISO/IEC 10646). N_Length and
1627 -- E_Length are the length returned in OS_Name and Encoding
1630 Info : Unit_Info renames Unit.Table (Num);
1631 Name : aliased constant String := Info.File_Name.all & ASCII.NUL;
1632 W_Name : aliased constant Wide_String := To_Wide_String (Name);
1633 EOL : constant EOL_String :=
1634 Get_EOL (Source, Source'First + Info.Offset);
1636 OS_Name : aliased String (1 .. Name'Length * 2);
1637 O_Length : aliased Natural := OS_Name'Length;
1638 Encoding : aliased String (1 .. 64);
1639 E_Length : aliased Natural := Encoding'Length;
1641 Length : File_Offset;
1644 -- Skip duplicated files
1646 if Is_Duplicated (Info.Sorted_Index) then
1647 Put_Line (" " & Info.File_Name.all & " skipped");
1648 Success := Overwrite_Files;
1656 OS_Name'Address, O_Length'Access,
1657 Encoding'Address, E_Length'Access);
1660 E_Name : constant String := OS_Name (1 .. O_Length);
1661 C_Name : aliased constant String := E_Name & ASCII.Nul;
1662 OS_Encoding : constant String := Encoding (1 .. E_Length);
1663 File : Stream_IO.File_Type;
1666 if not Overwrite_Files and then Exists (E_Name) then
1667 raise Stream_IO.Name_Error;
1670 (File, Stream_IO.Out_File, E_Name, OS_Encoding);
1674 when Stream_IO.Name_Error | Stream_IO.Use_Error =>
1675 Error_Msg ("cannot create " & Info.File_Name.all);
1679 -- A length of 0 indicates that the rest of the file belongs to
1680 -- this unit. The actual length must be calculated now. Take into
1681 -- account that the last character (EOF) must not be written.
1683 if Info.Length = 0 then
1684 Length := Source'Last - (Source'First + Info.Offset);
1686 Length := Info.Length;
1689 -- Prepend configuration pragmas if necessary
1691 if Success and then Info.Bufferg /= null then
1692 Write_Source_Reference_Pragma (Info, 1, File, EOL, Success);
1694 String'Write (Stream_IO.Stream (File), Info.Bufferg.all);
1697 Write_Source_Reference_Pragma
1698 (Info, Info.Start_Line, File, EOL, Success);
1703 (Stream_IO.Stream (File),
1704 Source (Source'First + Info.Offset ..
1705 Source'First + Info.Offset + Length - 1));
1707 when Stream_IO.Use_Error | Stream_IO.Device_Error =>
1708 Error_Msg ("disk full writing " & Info.File_Name.all);
1713 if not Quiet_Mode then
1714 Put_Line (" " & Info.File_Name.all);
1717 Stream_IO.Close (File);
1719 if Preserve_Mode then
1720 File_Time_Stamp (C_Name'Address, TS_Time);
1725 -- Start of processing for gnatchop
1728 -- Add the directory where gnatchop is invoked in front of the
1729 -- path, if gnatchop is invoked with directory information.
1730 -- Only do this if the platform is not VMS, where the notion of path
1731 -- does not really exist.
1733 if not Hostparm.OpenVMS then
1735 Command : constant String := Command_Name;
1738 for Index in reverse Command'Range loop
1739 if Command (Index) = Directory_Separator then
1741 Absolute_Dir : constant String :=
1743 (Command (Command'First .. Index));
1745 PATH : constant String :=
1748 Getenv ("PATH").all;
1751 Setenv ("PATH", PATH);
1760 -- Process command line options and initialize global variables
1762 -- First, scan to detect --version and/or --help
1764 Check_Version_And_Help ("GNATCHOP", "1998", Usage'Unrestricted_Access);
1766 if not Scan_Arguments then
1767 Set_Exit_Status (Failure);
1771 -- Check presence of required executables
1773 Gnat_Cmd := Locate_Executable (Gcc.all, not Gcc_Set);
1775 if Gnat_Cmd = null then
1776 goto No_Files_Written;
1779 -- First parse all files and read offset information
1781 for Num in 1 .. File.Last loop
1782 if not Parse_File (Num) then
1783 goto No_Files_Written;
1787 -- Check if any units have been found (assumes non-empty Unit.Table)
1789 if Unit.Last = 0 then
1790 if not Write_gnat_adc then
1791 Error_Msg ("no compilation units found", Warning => True);
1794 goto No_Files_Written;
1799 -- Check if any duplicate files would be created. If so, emit
1800 -- a warning if Overwrite_Files is true, otherwise generate an error.
1802 if Report_Duplicate_Units and then not Overwrite_Files then
1803 goto No_Files_Written;
1806 -- Check if any files exist, if so do not write anything
1807 -- Because all files have been parsed and checked already,
1808 -- there won't be any duplicates
1810 if not Overwrite_Files and then Files_Exist then
1811 goto No_Files_Written;
1814 -- After this point, all source files are read in succession
1815 -- and chopped into their destination files.
1817 -- As the Source_File_Name pragmas are handled as logical file 0,
1820 for F in 1 .. File.Last loop
1821 if not Write_Chopped_Files (F) then
1822 Set_Exit_Status (Failure);
1827 if Warning_Count > 0 then
1829 Warnings_Msg : constant String := Warning_Count'Img & " warning(s)";
1831 Error_Msg (Warnings_Msg (2 .. Warnings_Msg'Last), Warning => True);
1837 <<No_Files_Written>>
1839 -- Special error exit for all situations where no files have
1842 if not Write_gnat_adc then
1843 Error_Msg ("no source files written", Warning => True);
1849 when Types.Terminate_Program =>