1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1998-2007, AdaCore --
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 2, 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 COPYING. If not, write --
19 -- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
20 -- Boston, MA 02110-1301, USA. --
22 -- GNAT was originally developed by the GNAT team at New York University. --
23 -- Extensive contributions were provided by Ada Core Technologies Inc. --
25 ------------------------------------------------------------------------------
27 with Ada.Characters.Conversions; use Ada.Characters.Conversions;
28 with Ada.Command_Line; use Ada.Command_Line;
29 with Ada.Directories; use Ada.Directories;
30 with Ada.Streams.Stream_IO; use Ada.Streams;
31 with Ada.Text_IO; use Ada.Text_IO;
32 with System.CRTL; use System; use System.CRTL;
34 with GNAT.Command_Line; use GNAT.Command_Line;
35 with GNAT.OS_Lib; use GNAT.OS_Lib;
36 with GNAT.Heap_Sort_G;
44 Terminate_Program : exception;
45 -- Used to terminate execution immediately
47 Config_File_Name : constant String_Access := new String'("gnat.adc");
48 -- The name of the file holding the GNAT configuration pragmas
50 Gcc : String_Access := new String'("gcc");
51 -- May be modified by switch --GCC=
53 Gcc_Set : Boolean := False;
54 -- True if a switch --GCC= is used
56 Gnat_Cmd : String_Access;
57 -- Command to execute the GNAT compiler
59 Gnat_Args : Argument_List_Access :=
64 new String'("-gnats"),
65 new String'("-gnatu"));
66 -- Arguments used in Gnat_Cmd call
68 EOF : constant Character := Character'Val (26);
69 -- Special character to signal end of file. Not required in input
70 -- files, but properly treated if present. Not generated in output
71 -- files except as a result of copying input file.
77 subtype File_Num is Natural;
78 subtype File_Offset is Natural;
80 type File_Entry is record
82 -- Name of chop file or directory
84 SR_Name : String_Access;
85 -- Null unless the chop file starts with a source reference pragma
86 -- in which case this field points to the file name from this pragma.
89 package File is new GNAT.Table
90 (Table_Component_Type => File_Entry,
91 Table_Index_Type => File_Num,
94 Table_Increment => 100);
96 Directory : String_Access;
97 -- Record name of directory, or a null string if no directory given
99 Compilation_Mode : Boolean := False;
100 Overwrite_Files : Boolean := False;
101 Preserve_Mode : Boolean := False;
102 Quiet_Mode : Boolean := False;
103 Source_References : Boolean := False;
104 Verbose_Mode : Boolean := False;
105 Exit_On_Error : Boolean := False;
108 Write_gnat_adc : Boolean := False;
109 -- Gets set true if we append to gnat.adc or create a new gnat.adc.
110 -- Used to inhibit complaint about no units generated.
116 type Line_Num is new Natural;
117 -- Line number (for source reference pragmas)
119 type Unit_Count_Type is new Integer;
120 subtype Unit_Num is Unit_Count_Type range 1 .. Unit_Count_Type'Last;
121 -- Used to refer to unit number in unit table
123 type SUnit_Num is new Integer;
124 -- Used to refer to entry in sorted units table. Note that entry
125 -- zero is only for use by Heapsort, and is not otherwise referenced.
127 type Unit_Kind is (Unit_Spec, Unit_Body, Config_Pragmas);
129 -- Structure to contain all necessary information for one unit.
130 -- Entries are also temporarily used to record config pragma sequences.
132 type Unit_Info is record
133 File_Name : String_Access;
134 -- File name from GNAT output line
136 Chop_File : File_Num;
137 -- File number in chop file sequence
139 Start_Line : Line_Num;
140 -- Line number from GNAT output line
142 Offset : File_Offset;
143 -- Offset name from GNAT output line
145 SR_Present : Boolean;
146 -- Set True if SR parameter present
148 Length : File_Offset;
149 -- A length of 0 means that the Unit is the last one in the file
152 -- Indicates kind of unit
154 Sorted_Index : SUnit_Num;
155 -- Index of unit in sorted unit list
157 Bufferg : String_Access;
158 -- Pointer to buffer containing configuration pragmas to be
159 -- prepended. Null if no pragmas to be prepended.
162 -- The following table stores the unit offset information
164 package Unit is new GNAT.Table
165 (Table_Component_Type => Unit_Info,
166 Table_Index_Type => Unit_Count_Type,
167 Table_Low_Bound => 1,
168 Table_Initial => 500,
169 Table_Increment => 100);
171 -- The following table is used as a sorted index to the Unit.Table.
172 -- The entries in Unit.Table are not moved, instead we just shuffle
173 -- the entries in Sorted_Units. Note that the zeroeth entry in this
174 -- table is used by GNAT.Heap_Sort_G.
176 package Sorted_Units is new GNAT.Table
177 (Table_Component_Type => Unit_Num,
178 Table_Index_Type => SUnit_Num,
179 Table_Low_Bound => 0,
180 Table_Initial => 500,
181 Table_Increment => 100);
183 function Is_Duplicated (U : SUnit_Num) return Boolean;
184 -- Returns true if U is duplicated by a later unit.
185 -- Note that this function returns false for the last entry.
187 procedure Sort_Units;
188 -- Sort units and set up sorted unit table
190 ----------------------
191 -- File_Descriptors --
192 ----------------------
194 function dup (handle : File_Descriptor) return File_Descriptor;
195 function dup2 (from, to : File_Descriptor) return File_Descriptor;
197 ---------------------
198 -- Local variables --
199 ---------------------
201 Warning_Count : Natural := 0;
202 -- Count of warnings issued so far
204 -----------------------
205 -- Local subprograms --
206 -----------------------
208 procedure Error_Msg (Message : String; Warning : Boolean := False);
209 -- Produce an error message on standard error output
211 procedure File_Time_Stamp (Name : C_File_Name; Time : OS_Time);
212 -- Given the name of a file or directory, Name, set the
213 -- time stamp. This function must be used for an unopened file.
215 function Files_Exist return Boolean;
216 -- Check Unit.Table for possible file names that already exist
217 -- in the file system. Returns true if files exist, False otherwise
219 function Get_Maximum_File_Name_Length return Integer;
220 pragma Import (C, Get_Maximum_File_Name_Length,
221 "__gnat_get_maximum_file_name_length");
222 -- Function to get maximum file name length for system
224 Maximum_File_Name_Length : constant Integer := Get_Maximum_File_Name_Length;
225 Maximum_File_Name_Length_String : constant String :=
227 (Maximum_File_Name_Length);
229 function Locate_Executable
230 (Program_Name : String;
231 Look_For_Prefix : Boolean := True) return String_Access;
232 -- Locate executable for given program name. This takes into account
233 -- the target-prefix of the current command, if Look_For_Prefix is True.
235 subtype EOL_Length is Natural range 0 .. 2;
236 -- Possible lengths of end of line sequence
238 type EOL_String (Len : EOL_Length := 0) is record
239 Str : String (1 .. Len);
243 (Source : not null access String;
244 Start : Positive) return EOL_String;
245 -- Return the line terminator used in the passed string
248 (Source : not null access String;
249 Ptr : in out Positive);
250 -- On return Source (Ptr) is the first character of the next line
251 -- or EOF. Source.all must be terminated by EOF.
253 function Parse_File (Num : File_Num) return Boolean;
254 -- Calls the GNAT compiler to parse the given source file and parses the
255 -- output using Parse_Offset_Info. Returns True if parse operation
256 -- completes, False if some system error (e.g. failure to read the
257 -- offset information) occurs.
259 procedure Parse_Offset_Info
260 (Chop_File : File_Num;
261 Source : not null access String);
262 -- Parses the output of the compiler indicating the offsets
263 -- and names of the compilation units in Chop_File.
265 procedure Parse_Token
266 (Source : not null access String;
267 Ptr : in out Positive;
268 Token_Ptr : out Positive);
269 -- Skips any separators and stores the start of the token in Token_Ptr.
270 -- Then stores the position of the next separator in Ptr.
271 -- On return Source (Token_Ptr .. Ptr - 1) is the token.
274 (FD : File_Descriptor;
275 Contents : out String_Access;
276 Success : out Boolean);
277 -- Reads file associated with FS into the newly allocated
279 -- [VMS] Success is true iff the number of bytes read is less than or
280 -- equal to the file size.
281 -- [Other] Success is true iff the number of bytes read is equal to
284 function Report_Duplicate_Units return Boolean;
285 -- Output messages about duplicate units in the input files in Unit.Table
286 -- Returns True if any duplicates found, Fals if no duplicates found.
288 function Scan_Arguments return Boolean;
289 -- Scan command line options and set global variables accordingly.
290 -- Also scan out file and directory arguments. Returns True if scan
291 -- was successful, and False if the scan fails for any reason.
294 -- Output message on standard output describing syntax of gnatchop command
296 procedure Warning_Msg (Message : String);
297 -- Output a warning message on standard error and update warning count
299 function Write_Chopped_Files (Input : File_Num) return Boolean;
300 -- Write all units that result from chopping the Input file
302 procedure Write_Config_File (Input : File_Num; U : Unit_Num);
303 -- Call to write configuration pragmas (append them to gnat.adc)
304 -- Input is the file number for the chop file and U identifies the
305 -- unit entry for the configuration pragmas.
307 function Get_Config_Pragmas
309 U : Unit_Num) return String_Access;
310 -- Call to read configuration pragmas from given unit entry, and
311 -- return a buffer containing the pragmas to be appended to
312 -- following units. Input is the file number for the chop file and
313 -- U identifies the unit entry for the configuration pragmas.
315 procedure Write_Source_Reference_Pragma
318 File : Stream_IO.File_Type;
320 Success : in out Boolean);
321 -- If Success is True on entry, writes a source reference pragma using
322 -- the chop file from Info, and the given line number. On return Success
323 -- indicates whether the write succeeded. If Success is False on entry,
324 -- or if the global flag Source_References is False, then the call to
325 -- Write_Source_Reference_Pragma has no effect. EOL indicates the end
326 -- of line sequence to be written at the end of the pragma.
329 (Source : not null access String;
332 Success : out Boolean);
333 -- Write one compilation unit of the source to file
339 function dup (handle : File_Descriptor) return File_Descriptor is
341 return File_Descriptor (System.CRTL.dup (int (handle)));
348 function dup2 (from, to : File_Descriptor) return File_Descriptor is
350 return File_Descriptor (System.CRTL.dup2 (int (from), int (to)));
357 procedure Error_Msg (Message : String; Warning : Boolean := False) is
359 Put_Line (Standard_Error, Message);
362 Set_Exit_Status (Failure);
364 if Exit_On_Error then
365 raise Terminate_Program;
370 ---------------------
371 -- File_Time_Stamp --
372 ---------------------
374 procedure File_Time_Stamp (Name : C_File_Name; Time : OS_Time) is
375 procedure Set_File_Time (Name : C_File_Name; Time : OS_Time);
376 pragma Import (C, Set_File_Time, "__gnat_set_file_time_name");
379 Set_File_Time (Name, Time);
386 function Files_Exist return Boolean is
387 Exists : Boolean := False;
390 for SNum in 1 .. SUnit_Num (Unit.Last) loop
392 -- Only check and report for the last instance of duplicated files
394 if not Is_Duplicated (SNum) then
396 Info : constant Unit_Info :=
397 Unit.Table (Sorted_Units.Table (SNum));
400 if Is_Writable_File (Info.File_Name.all) then
401 if Hostparm.OpenVMS then
404 & " already exists, use /OVERWRITE to overwrite");
406 Error_Msg (Info.File_Name.all
407 & " already exists, use -w to overwrite");
419 ------------------------
420 -- Get_Config_Pragmas --
421 ------------------------
423 function Get_Config_Pragmas
428 Info : Unit_Info renames Unit.Table (U);
429 FD : File_Descriptor;
430 Name : aliased constant String :=
431 File.Table (Input).Name.all & ASCII.Nul;
432 Length : File_Offset;
433 Buffer : String_Access;
435 Result : String_Access;
438 FD := Open_Read (Name'Address, Binary);
440 if FD = Invalid_FD then
441 Error_Msg ("cannot open " & File.Table (Input).Name.all);
445 Read_File (FD, Buffer, Success);
447 -- A length of 0 indicates that the rest of the file belongs to
448 -- this unit. The actual length must be calculated now. Take into
449 -- account that the last character (EOF) must not be written.
451 if Info.Length = 0 then
452 Length := Buffer'Last - (Buffer'First + Info.Offset);
454 Length := Info.Length;
457 Result := new String'(Buffer (1 .. Length));
460 end Get_Config_Pragmas;
467 (Source : not null access String;
471 Ptr : Positive := Start;
476 -- Skip to end of line
478 while Source (Ptr) /= ASCII.CR and then
479 Source (Ptr) /= ASCII.LF and then
487 if Source (Ptr) /= EOF then
497 -- Recognize CR/LF or LF/CR combination
499 if (Source (Ptr + 1) = ASCII.CR or Source (Ptr + 1) = ASCII.LF)
500 and then Source (Ptr) /= Source (Ptr + 1)
505 return (Len => Last + 1 - First, Str => Source (First .. Last));
512 function Is_Duplicated (U : SUnit_Num) return Boolean is
514 return U < SUnit_Num (Unit.Last)
516 Unit.Table (Sorted_Units.Table (U)).File_Name.all =
517 Unit.Table (Sorted_Units.Table (U + 1)).File_Name.all;
520 -----------------------
521 -- Locate_Executable --
522 -----------------------
524 function Locate_Executable
525 (Program_Name : String;
526 Look_For_Prefix : Boolean := True) return String_Access
528 Current_Command : constant String := Normalize_Pathname (Command_Name);
529 End_Of_Prefix : Natural;
530 Start_Of_Prefix : Positive;
531 Result : String_Access;
534 Start_Of_Prefix := Current_Command'First;
535 End_Of_Prefix := Start_Of_Prefix - 1;
537 if Look_For_Prefix then
539 -- Find Start_Of_Prefix
541 for J in reverse Current_Command'Range loop
542 if Current_Command (J) = '/' or
543 Current_Command (J) = Directory_Separator or
544 Current_Command (J) = ':'
546 Start_Of_Prefix := J + 1;
551 -- Find End_Of_Prefix
553 for J in reverse Start_Of_Prefix .. Current_Command'Last loop
554 if Current_Command (J) = '-' then
562 Command : constant String :=
563 Current_Command (Start_Of_Prefix .. End_Of_Prefix) &
566 Result := Locate_Exec_On_Path (Command);
568 if Result = null then
570 (Command & ": installation problem, executable not found");
575 end Locate_Executable;
582 (Source : not null access String;
583 Ptr : in out Positive) is
585 -- Skip to end of line
587 while Source (Ptr) /= ASCII.CR and then Source (Ptr) /= ASCII.LF
588 and then Source (Ptr) /= EOF
593 if Source (Ptr) /= EOF then
594 Ptr := Ptr + 1; -- skip CR or LF
597 -- Skip past CR/LF or LF/CR combination
599 if (Source (Ptr) = ASCII.CR or Source (Ptr) = ASCII.LF)
600 and then Source (Ptr) /= Source (Ptr - 1)
610 function Parse_File (Num : File_Num) return Boolean is
611 Chop_Name : constant String_Access := File.Table (Num).Name;
612 Save_Stdout : constant File_Descriptor := dup (Standout);
613 Offset_Name : Temp_File_Name;
614 Offset_FD : File_Descriptor;
615 Buffer : String_Access;
620 -- Display copy of GNAT command if verbose mode
625 for J in 1 .. Gnat_Args'Length loop
627 Put (Gnat_Args (J).all);
631 Put_Line (Chop_Name.all);
634 -- Create temporary file
636 Create_Temp_File (Offset_FD, Offset_Name);
638 if Offset_FD = Invalid_FD then
639 Error_Msg ("gnatchop: cannot create temporary file");
644 -- Redirect Stdout to this temporary file in the Unix way
646 if dup2 (Offset_FD, Standout) = Invalid_FD then
647 Error_Msg ("gnatchop: cannot redirect stdout to temporary file");
653 -- Call Gnat on the source filename argument with special options
654 -- to generate offset information. If this special compilation completes
655 -- successfully then we can do the actual gnatchop operation.
657 Spawn (Gnat_Cmd.all, Gnat_Args.all & Chop_Name, Success);
660 Error_Msg (Chop_Name.all & ": parse errors detected");
661 Error_Msg (Chop_Name.all & ": chop may not be successful");
666 if dup2 (Save_Stdout, Standout) = Invalid_FD then
667 Error_Msg ("gnatchop: cannot restore stdout");
670 -- Reopen the file to start reading from the beginning
674 Offset_FD := Open_Read (Offset_Name'Address, Binary);
676 if Offset_FD = Invalid_FD then
677 Error_Msg ("gnatchop: cannot access offset info");
681 Read_File (Offset_FD, Buffer, Success);
684 Error_Msg ("gnatchop: error reading offset info");
688 Parse_Offset_Info (Num, Buffer);
691 -- Close and delete temporary file
694 Delete_File (Offset_Name'Address, Success);
699 when Failure | Terminate_Program =>
701 Delete_File (Offset_Name'Address, Success);
706 -----------------------
707 -- Parse_Offset_Info --
708 -----------------------
710 procedure Parse_Offset_Info
711 (Chop_File : File_Num;
712 Source : not null access String)
714 First_Unit : constant Unit_Num := Unit.Last + 1;
715 Bufferg : String_Access := null;
716 Parse_Ptr : File_Offset := Source'First;
717 Token_Ptr : File_Offset;
720 function Match (Literal : String) return Boolean;
721 -- Checks if given string appears at the current Token_Ptr location
722 -- and if so, bumps Parse_Ptr past the token and returns True. If
723 -- the string is not present, sets Parse_Ptr to Token_Ptr and
730 function Match (Literal : String) return Boolean is
732 Parse_Token (Source, Parse_Ptr, Token_Ptr);
734 if Source'Last + 1 - Token_Ptr < Literal'Length
736 Source (Token_Ptr .. Token_Ptr + Literal'Length - 1) /= Literal
738 Parse_Ptr := Token_Ptr;
742 Parse_Ptr := Token_Ptr + Literal'Length;
746 -- Start of processing for Parse_Offset_Info
750 -- Set default values, should get changed for all
751 -- units/pragmas except for the last
753 Info.Chop_File := Chop_File;
756 -- Parse the current line of offset information into Info
757 -- and exit the loop if there are any errors or on EOF.
759 -- First case, parse a line in the following format:
761 -- Unit x (spec) line 7, file offset 142, [SR, ]file name x.ads
763 -- Note that the unit name can be an operator name in quotes.
764 -- This is of course illegal, but both GNAT and gnatchop handle
765 -- the case so that this error does not intefere with chopping.
767 -- The SR ir present indicates that a source reference pragma
768 -- was processed as part of this unit (and that therefore no
769 -- Source_Reference pragma should be generated.
771 if Match ("Unit") then
772 Parse_Token (Source, Parse_Ptr, Token_Ptr);
774 if Match ("(body)") then
775 Info.Kind := Unit_Body;
776 elsif Match ("(spec)") then
777 Info.Kind := Unit_Spec;
782 exit when not Match ("line");
783 Parse_Token (Source, Parse_Ptr, Token_Ptr);
784 Info.Start_Line := Line_Num'Value
785 (Source (Token_Ptr .. Parse_Ptr - 1));
787 exit when not Match ("file offset");
788 Parse_Token (Source, Parse_Ptr, Token_Ptr);
789 Info.Offset := File_Offset'Value
790 (Source (Token_Ptr .. Parse_Ptr - 1));
792 Info.SR_Present := Match ("SR, ");
794 exit when not Match ("file name");
795 Parse_Token (Source, Parse_Ptr, Token_Ptr);
796 Info.File_Name := new String'
797 (Directory.all & Source (Token_Ptr .. Parse_Ptr - 1));
798 Parse_EOL (Source, Parse_Ptr);
800 -- Second case, parse a line of the following form
802 -- Configuration pragmas at line 10, file offset 223
804 elsif Match ("Configuration pragmas at") then
805 Info.Kind := Config_Pragmas;
806 Info.File_Name := Config_File_Name;
808 exit when not Match ("line");
809 Parse_Token (Source, Parse_Ptr, Token_Ptr);
810 Info.Start_Line := Line_Num'Value
811 (Source (Token_Ptr .. Parse_Ptr - 1));
813 exit when not Match ("file offset");
814 Parse_Token (Source, Parse_Ptr, Token_Ptr);
815 Info.Offset := File_Offset'Value
816 (Source (Token_Ptr .. Parse_Ptr - 1));
818 Parse_EOL (Source, Parse_Ptr);
820 -- Third case, parse a line of the following form
822 -- Source_Reference pragma for file "filename"
824 -- This appears at the start of the file only, and indicates
825 -- the name to be used on any generated Source_Reference pragmas.
827 elsif Match ("Source_Reference pragma for file ") then
828 Parse_Token (Source, Parse_Ptr, Token_Ptr);
829 File.Table (Chop_File).SR_Name :=
830 new String'(Source (Token_Ptr + 1 .. Parse_Ptr - 2));
831 Parse_EOL (Source, Parse_Ptr);
834 -- Unrecognized keyword or end of file
840 -- Store the data in the Info record in the Unit.Table
843 Unit.Table (Unit.Last) := Info;
845 -- If this is not the first unit from the file, calculate
846 -- the length of the previous unit as difference of the offsets
848 if Unit.Last > First_Unit then
849 Unit.Table (Unit.Last - 1).Length :=
850 Info.Offset - Unit.Table (Unit.Last - 1).Offset;
853 -- If not in compilation mode combine current unit with any
854 -- preceding configuration pragmas.
856 if not Compilation_Mode
857 and then Unit.Last > First_Unit
858 and then Unit.Table (Unit.Last - 1).Kind = Config_Pragmas
860 Info.Start_Line := Unit.Table (Unit.Last - 1).Start_Line;
861 Info.Offset := Unit.Table (Unit.Last - 1).Offset;
863 -- Delete the configuration pragma entry
865 Unit.Table (Unit.Last - 1) := Info;
869 -- If in compilation mode, and previous entry is the initial
870 -- entry for the file and is for configuration pragmas, then
871 -- they are to be appended to every unit in the file.
874 and then Unit.Last = First_Unit + 1
875 and then Unit.Table (First_Unit).Kind = Config_Pragmas
879 (Unit.Table (Unit.Last - 1).Chop_File, First_Unit);
880 Unit.Table (Unit.Last - 1) := Info;
884 Unit.Table (Unit.Last).Bufferg := Bufferg;
886 -- If in compilation mode, and this is not the first item,
887 -- combine configuration pragmas with previous unit, which
888 -- will cause an error message to be generated when the unit
892 and then Unit.Last > First_Unit
893 and then Unit.Table (Unit.Last).Kind = Config_Pragmas
903 -- Find out if the loop was exited prematurely because of
904 -- an error or if the EOF marker was found.
906 if Source (Parse_Ptr) /= EOF then
908 (File.Table (Chop_File).Name.all & ": error parsing offset info");
912 -- Handle case of a chop file consisting only of config pragmas
914 if Unit.Last = First_Unit
915 and then Unit.Table (Unit.Last).Kind = Config_Pragmas
917 -- In compilation mode, we append such a file to gnat.adc
919 if Compilation_Mode then
920 Write_Config_File (Unit.Table (Unit.Last).Chop_File, First_Unit);
923 -- In default (non-compilation) mode, this is invalid
927 (File.Table (Chop_File).Name.all &
928 ": no units found (only pragmas)");
933 -- Handle case of a chop file ending with config pragmas. This can
934 -- happen only in default non-compilation mode, since in compilation
935 -- mode such configuration pragmas are part of the preceding unit.
936 -- We simply concatenate such pragmas to the previous file which
937 -- will cause a compilation error, which is appropriate.
939 if Unit.Last > First_Unit
940 and then Unit.Table (Unit.Last).Kind = Config_Pragmas
944 end Parse_Offset_Info;
950 procedure Parse_Token
951 (Source : not null access String;
952 Ptr : in out Positive;
953 Token_Ptr : out Positive)
955 In_Quotes : Boolean := False;
960 while Source (Ptr) = ' ' or Source (Ptr) = ',' loop
968 while (In_Quotes or else not (Source (Ptr) = ' ' or Source (Ptr) = ','))
969 and then Source (Ptr) >= ' '
971 if Source (Ptr) = '"' then
972 In_Quotes := not In_Quotes;
984 (FD : File_Descriptor;
985 Contents : out String_Access;
986 Success : out Boolean)
988 Length : constant File_Offset := File_Offset (File_Length (FD));
989 -- Include room for EOF char
990 Buffer : constant String_Access := new String (1 .. Length + 1);
993 Read_Ptr : File_Offset := 1;
998 This_Read := Read (FD,
999 A => Buffer (Read_Ptr)'Address,
1000 N => Length + 1 - Read_Ptr);
1001 Read_Ptr := Read_Ptr + Integer'Max (This_Read, 0);
1002 exit when This_Read <= 0;
1005 Buffer (Read_Ptr) := EOF;
1006 Contents := new String (1 .. Read_Ptr);
1007 Contents.all := Buffer (1 .. Read_Ptr);
1009 -- Things aren't simple on VMS due to the plethora of file types
1010 -- and organizations. It seems clear that there shouldn't be more
1011 -- bytes read than are contained in the file though.
1013 if Hostparm.OpenVMS then
1014 Success := Read_Ptr <= Length + 1;
1016 Success := Read_Ptr = Length + 1;
1020 ----------------------------
1021 -- Report_Duplicate_Units --
1022 ----------------------------
1024 function Report_Duplicate_Units return Boolean is
1028 Duplicates : Boolean := False;
1032 while US < SUnit_Num (Unit.Last) loop
1033 U := Sorted_Units.Table (US);
1035 if Is_Duplicated (US) then
1038 -- Move to last two versions of duplicated file to make it clearer
1039 -- to understand which file is retained in case of overwriting.
1041 while US + 1 < SUnit_Num (Unit.Last) loop
1042 exit when not Is_Duplicated (US + 1);
1046 U := Sorted_Units.Table (US);
1048 if Overwrite_Files then
1049 Warning_Msg (Unit.Table (U).File_Name.all
1050 & " is duplicated (all but last will be skipped)");
1052 elsif Unit.Table (U).Chop_File =
1053 Unit.Table (Sorted_Units.Table (US + 1)).Chop_File
1055 Error_Msg (Unit.Table (U).File_Name.all
1056 & " is duplicated in "
1057 & File.Table (Unit.Table (U).Chop_File).Name.all);
1060 Error_Msg (Unit.Table (U).File_Name.all
1062 & File.Table (Unit.Table (U).Chop_File).Name.all
1063 & " is duplicated in "
1066 (Sorted_Units.Table (US + 1)).Chop_File).Name.all);
1073 if Duplicates and not Overwrite_Files then
1074 if Hostparm.OpenVMS then
1076 ("use /OVERWRITE to overwrite files and keep last version");
1078 Put_Line ("use -w to overwrite files and keep last version");
1083 end Report_Duplicate_Units;
1085 --------------------
1086 -- Scan_Arguments --
1087 --------------------
1089 function Scan_Arguments return Boolean is
1090 Kset : Boolean := False;
1091 -- Set true if -k switch found
1094 Initialize_Option_Scan;
1096 -- Scan options first
1099 case Getopt ("c gnat? h k? p q r v w x -GCC=!") is
1104 Gcc := new String'(Parameter);
1108 Compilation_Mode := True;
1112 new Argument_List'(Gnat_Args.all &
1113 new String'("-gnat" & Parameter));
1117 raise Terminate_Program;
1121 Param : String_Access := new String'(Parameter);
1124 if Param.all /= "" then
1125 for J in Param'Range loop
1126 if Param (J) not in '0' .. '9' then
1127 if Hostparm.OpenVMS then
1128 Error_Msg ("/FILE_NAME_MAX_LENGTH=nnn" &
1129 " requires numeric parameter");
1131 Error_Msg ("-k# requires numeric parameter");
1139 if Hostparm.OpenVMS then
1140 Param := new String'("39");
1142 Param := new String'("8");
1147 new Argument_List'(Gnat_Args.all &
1148 new String'("-gnatk" & Param.all));
1153 Preserve_Mode := True;
1159 Source_References := True;
1162 Verbose_Mode := True;
1164 -- Why is following written to standard error. Most other
1165 -- tools write to standard output ???
1167 Put (Standard_Error, "GNATCHOP ");
1168 Put_Line (Standard_Error, Gnatvsn.Gnat_Version_String);
1170 (Standard_Error, "Copyright 1998-2005, AdaCore");
1173 Overwrite_Files := True;
1176 Exit_On_Error := True;
1183 if not Kset and then Maximum_File_Name_Length > 0 then
1185 -- If this system has restricted filename lengths, tell gnat1
1186 -- about them, removing the leading blank from the image string.
1189 new Argument_List'(Gnat_Args.all
1190 & new String'("-gnatk"
1191 & Maximum_File_Name_Length_String
1192 (Maximum_File_Name_Length_String'First + 1
1193 .. Maximum_File_Name_Length_String'Last)));
1200 S : constant String := Get_Argument (Do_Expansion => True);
1204 File.Increment_Last;
1205 File.Table (File.Last).Name := new String'(S);
1206 File.Table (File.Last).SR_Name := null;
1210 -- Case of more than one file where last file is a directory
1213 and then Is_Directory (File.Table (File.Last).Name.all)
1215 Directory := File.Table (File.Last).Name;
1216 File.Decrement_Last;
1218 -- Make sure Directory is terminated with a directory separator,
1219 -- so we can generate the output by just appending a filename.
1221 if Directory (Directory'Last) /= Directory_Separator
1222 and then Directory (Directory'Last) /= '/'
1224 Directory := new String'(Directory.all & Directory_Separator);
1227 -- At least one filename must be given
1229 elsif File.Last = 0 then
1233 -- No directory given, set directory to null, so that we can just
1234 -- concatenate the directory name to the file name unconditionally.
1237 Directory := new String'("");
1240 -- Finally check all filename arguments
1242 for File_Num in 1 .. File.Last loop
1244 F : constant String := File.Table (File_Num).Name.all;
1248 if Is_Directory (F) then
1249 Error_Msg (F & " is a directory, cannot be chopped");
1252 elsif not Is_Regular_File (F) then
1253 Error_Msg (F & " not found");
1262 when Invalid_Switch =>
1263 Error_Msg ("invalid switch " & Full_Switch);
1266 when Invalid_Parameter =>
1267 if Hostparm.OpenVMS then
1268 Error_Msg ("/FILE_NAME_MAX_LENGTH=nnn qualifier" &
1269 " requires numeric parameter");
1271 Error_Msg ("-k switch requires numeric parameter");
1282 procedure Sort_Units is
1284 procedure Move (From : Natural; To : Natural);
1285 -- Procedure used to sort the unit list
1286 -- Unit.Table (To) := Unit_List (From); used by sort
1288 function Lt (Left, Right : Natural) return Boolean;
1289 -- Compares Left and Right units based on file name (first),
1290 -- Chop_File (second) and Offset (third). This ordering is
1291 -- important to keep the last version in case of duplicate files.
1293 package Unit_Sort is new GNAT.Heap_Sort_G (Move, Lt);
1294 -- Used for sorting on filename to detect duplicates
1300 function Lt (Left, Right : Natural) return Boolean is
1301 L : Unit_Info renames
1302 Unit.Table (Sorted_Units.Table (SUnit_Num (Left)));
1304 R : Unit_Info renames
1305 Unit.Table (Sorted_Units.Table (SUnit_Num (Right)));
1308 return L.File_Name.all < R.File_Name.all
1309 or else (L.File_Name.all = R.File_Name.all
1310 and then (L.Chop_File < R.Chop_File
1311 or else (L.Chop_File = R.Chop_File
1312 and then L.Offset < R.Offset)));
1319 procedure Move (From : Natural; To : Natural) is
1321 Sorted_Units.Table (SUnit_Num (To)) :=
1322 Sorted_Units.Table (SUnit_Num (From));
1325 -- Start of processing for Sort_Units
1328 Sorted_Units.Set_Last (SUnit_Num (Unit.Last));
1330 for J in 1 .. Unit.Last loop
1331 Sorted_Units.Table (SUnit_Num (J)) := J;
1334 -- Sort Unit.Table, using Sorted_Units.Table (0) as scratch
1336 Unit_Sort.Sort (Natural (Unit.Last));
1338 -- Set the Sorted_Index fields in the unit tables
1340 for J in 1 .. SUnit_Num (Unit.Last) loop
1341 Unit.Table (Sorted_Units.Table (J)).Sorted_Index := J;
1352 ("Usage: gnatchop [-c] [-h] [-k#] " &
1353 "[-r] [-p] [-q] [-v] [-w] [-x] [--GCC=xx] file [file ...] [dir]");
1357 (" -c compilation mode, configuration pragmas " &
1361 (" -gnatxxx passes the -gnatxxx switch to gnat parser");
1364 (" -h help: output this usage information");
1367 (" -k# krunch file names of generated files to " &
1368 "no more than # characters");
1371 (" -k krunch file names of generated files to " &
1372 "no more than 8 characters");
1375 (" -p preserve time stamp, output files will " &
1376 "have same stamp as input");
1379 (" -q quiet mode, no output of generated file " &
1383 (" -r generate Source_Reference pragmas refer" &
1384 "encing original source file");
1387 (" -v verbose mode, output version and generat" &
1391 (" -w overwrite existing filenames");
1394 (" -x exit on error");
1397 (" --GCC=xx specify the path of the gnat parser to be used");
1401 (" file... list of source files to be chopped");
1404 (" dir directory location for split files (defa" &
1405 "ult = current directory)");
1412 procedure Warning_Msg (Message : String) is
1414 Warning_Count := Warning_Count + 1;
1415 Put_Line (Standard_Error, "warning: " & Message);
1418 -------------------------
1419 -- Write_Chopped_Files --
1420 -------------------------
1422 function Write_Chopped_Files (Input : File_Num) return Boolean is
1423 Name : aliased constant String :=
1424 File.Table (Input).Name.all & ASCII.Nul;
1425 FD : File_Descriptor;
1426 Buffer : String_Access;
1431 FD := Open_Read (Name'Address, Binary);
1432 TS_Time := File_Time_Stamp (FD);
1434 if FD = Invalid_FD then
1435 Error_Msg ("cannot open " & File.Table (Input).Name.all);
1439 Read_File (FD, Buffer, Success);
1442 Error_Msg ("cannot read " & File.Table (Input).Name.all);
1447 if not Quiet_Mode then
1448 Put_Line ("splitting " & File.Table (Input).Name.all & " into:");
1451 -- Only chop those units that come from this file
1453 for Num in 1 .. Unit.Last loop
1454 if Unit.Table (Num).Chop_File = Input then
1455 Write_Unit (Buffer, Num, TS_Time, Success);
1456 exit when not Success;
1462 end Write_Chopped_Files;
1464 -----------------------
1465 -- Write_Config_File --
1466 -----------------------
1468 procedure Write_Config_File (Input : File_Num; U : Unit_Num) is
1469 FD : File_Descriptor;
1470 Name : aliased constant String := "gnat.adc" & ASCII.NUL;
1471 Buffer : String_Access;
1474 Buffera : String_Access;
1478 Write_gnat_adc := True;
1479 FD := Open_Read_Write (Name'Address, Binary);
1481 if FD = Invalid_FD then
1482 FD := Create_File (Name'Address, Binary);
1485 if not Quiet_Mode then
1486 Put_Line ("writing configuration pragmas from " &
1487 File.Table (Input).Name.all & " to gnat.adc");
1493 if not Quiet_Mode then
1495 ("appending configuration pragmas from " &
1496 File.Table (Input).Name.all & " to gnat.adc");
1500 Success := FD /= Invalid_FD;
1503 Error_Msg ("cannot create gnat.adc");
1507 -- In append mode, acquire existing gnat.adc file
1510 Read_File (FD, Buffera, Success);
1513 Error_Msg ("cannot read gnat.adc");
1517 -- Find location of EOF byte if any to exclude from append
1520 while Bufferl <= Buffera'Last
1521 and then Buffera (Bufferl) /= EOF
1523 Bufferl := Bufferl + 1;
1526 Bufferl := Bufferl - 1;
1529 -- Write existing gnat.adc to new gnat.adc file
1531 FD := Create_File (Name'Address, Binary);
1532 Success := Write (FD, Buffera (1)'Address, Bufferl) = Bufferl;
1535 Error_Msg ("error writing gnat.adc");
1540 Buffer := Get_Config_Pragmas (Input, U);
1542 if Buffer /= null then
1543 Success := Write (FD, Buffer.all'Address, Buffer'Length) =
1547 Error_Msg ("disk full writing gnat.adc");
1553 end Write_Config_File;
1555 -----------------------------------
1556 -- Write_Source_Reference_Pragma --
1557 -----------------------------------
1559 procedure Write_Source_Reference_Pragma
1562 File : Stream_IO.File_Type;
1564 Success : in out Boolean)
1566 FTE : File_Entry renames Gnatchop.File.Table (Info.Chop_File);
1567 Nam : String_Access;
1570 if Success and Source_References and not Info.SR_Present then
1571 if FTE.SR_Name /= null then
1578 Reference : String :=
1579 "pragma Source_Reference (000000, """
1580 & Nam.all & """);" & EOL.Str;
1582 Pos : Positive := Reference'First;
1583 Lin : Line_Num := Line;
1586 while Reference (Pos + 1) /= ',' loop
1590 while Reference (Pos) = '0' loop
1591 Reference (Pos) := Character'Val
1592 (Character'Pos ('0') + Lin mod 10);
1597 -- Assume there are enough zeroes for any program length
1599 pragma Assert (Lin = 0);
1602 String'Write (Stream_IO.Stream (File), Reference);
1610 end Write_Source_Reference_Pragma;
1616 procedure Write_Unit
1617 (Source : not null access String;
1620 Success : out Boolean)
1623 procedure OS_Filename
1625 W_Name : Wide_String;
1627 N_Length : access Natural;
1629 E_Length : access Natural);
1630 pragma Import (C, OS_Filename, "__gnat_os_filename");
1631 -- Returns in OS_Name the proper name for the OS when used with the
1632 -- returned Encoding value. For example on Windows this will return the
1633 -- UTF-8 encoded name into OS_Name and set Encoding to encoding=utf8
1634 -- (form parameter Stream_IO).
1635 -- Name is the filename and W_Name the same filename in Unicode 16 bits
1636 -- (this corresponds to Win32 Unicode ISO/IEC 10646). N_Length and
1637 -- E_Length are the length returned in OS_Name and Encoding
1640 Info : Unit_Info renames Unit.Table (Num);
1641 Name : aliased constant String := Info.File_Name.all & ASCII.NUL;
1642 W_Name : aliased constant Wide_String := To_Wide_String (Name);
1643 EOL : constant EOL_String :=
1644 Get_EOL (Source, Source'First + Info.Offset);
1646 OS_Name : aliased String (1 .. Name'Length * 2);
1647 O_Length : aliased Natural := OS_Name'Length;
1648 Encoding : aliased String (1 .. 64);
1649 E_Length : aliased Natural := Encoding'Length;
1651 Length : File_Offset;
1654 -- Skip duplicated files
1656 if Is_Duplicated (Info.Sorted_Index) then
1657 Put_Line (" " & Info.File_Name.all & " skipped");
1658 Success := Overwrite_Files;
1666 OS_Name'Address, O_Length'Access,
1667 Encoding'Address, E_Length'Access);
1670 E_Name : constant String := OS_Name (1 .. O_Length);
1671 C_Name : aliased constant String := E_Name & ASCII.Nul;
1672 OS_Encoding : constant String := Encoding (1 .. E_Length);
1673 File : Stream_IO.File_Type;
1676 if not Overwrite_Files and then Exists (E_Name) then
1677 raise Stream_IO.Name_Error;
1680 (File, Stream_IO.Out_File, E_Name, OS_Encoding);
1684 when Stream_IO.Name_Error | Stream_IO.Use_Error =>
1685 Error_Msg ("cannot create " & Info.File_Name.all);
1689 -- A length of 0 indicates that the rest of the file belongs to
1690 -- this unit. The actual length must be calculated now. Take into
1691 -- account that the last character (EOF) must not be written.
1693 if Info.Length = 0 then
1694 Length := Source'Last - (Source'First + Info.Offset);
1696 Length := Info.Length;
1699 -- Prepend configuration pragmas if necessary
1701 if Success and then Info.Bufferg /= null then
1702 Write_Source_Reference_Pragma (Info, 1, File, EOL, Success);
1704 String'Write (Stream_IO.Stream (File), Info.Bufferg.all);
1707 Write_Source_Reference_Pragma
1708 (Info, Info.Start_Line, File, EOL, Success);
1713 (Stream_IO.Stream (File),
1714 Source (Source'First + Info.Offset ..
1715 Source'First + Info.Offset + Length - 1));
1717 when Stream_IO.Use_Error | Stream_IO.Device_Error =>
1718 Error_Msg ("disk full writing " & Info.File_Name.all);
1723 if not Quiet_Mode then
1724 Put_Line (" " & Info.File_Name.all);
1727 Stream_IO.Close (File);
1729 if Preserve_Mode then
1730 File_Time_Stamp (C_Name'Address, TS_Time);
1735 -- Start of processing for gnatchop
1738 -- Add the directory where gnatchop is invoked in front of the
1739 -- path, if gnatchop is invoked with directory information.
1740 -- Only do this if the platform is not VMS, where the notion of path
1741 -- does not really exist.
1743 if not Hostparm.OpenVMS then
1745 Command : constant String := Command_Name;
1748 for Index in reverse Command'Range loop
1749 if Command (Index) = Directory_Separator then
1751 Absolute_Dir : constant String :=
1753 (Command (Command'First .. Index));
1755 PATH : constant String :=
1758 Getenv ("PATH").all;
1761 Setenv ("PATH", PATH);
1770 -- Process command line options and initialize global variables
1772 if not Scan_Arguments then
1773 Set_Exit_Status (Failure);
1777 -- Check presence of required executables
1779 Gnat_Cmd := Locate_Executable (Gcc.all, not Gcc_Set);
1781 if Gnat_Cmd = null then
1782 goto No_Files_Written;
1785 -- First parse all files and read offset information
1787 for Num in 1 .. File.Last loop
1788 if not Parse_File (Num) then
1789 goto No_Files_Written;
1793 -- Check if any units have been found (assumes non-empty Unit.Table)
1795 if Unit.Last = 0 then
1796 if not Write_gnat_adc then
1797 Error_Msg ("no compilation units found", Warning => True);
1800 goto No_Files_Written;
1805 -- Check if any duplicate files would be created. If so, emit
1806 -- a warning if Overwrite_Files is true, otherwise generate an error.
1808 if Report_Duplicate_Units and then not Overwrite_Files then
1809 goto No_Files_Written;
1812 -- Check if any files exist, if so do not write anything
1813 -- Because all files have been parsed and checked already,
1814 -- there won't be any duplicates
1816 if not Overwrite_Files and then Files_Exist then
1817 goto No_Files_Written;
1820 -- After this point, all source files are read in succession
1821 -- and chopped into their destination files.
1823 -- As the Source_File_Name pragmas are handled as logical file 0,
1826 for F in 1 .. File.Last loop
1827 if not Write_Chopped_Files (F) then
1828 Set_Exit_Status (Failure);
1833 if Warning_Count > 0 then
1835 Warnings_Msg : constant String := Warning_Count'Img & " warning(s)";
1837 Error_Msg (Warnings_Msg (2 .. Warnings_Msg'Last), Warning => True);
1843 <<No_Files_Written>>
1845 -- Special error exit for all situations where no files have
1848 if not Write_gnat_adc then
1849 Error_Msg ("no source files written", Warning => True);
1855 when Terminate_Program =>