1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
10 -- Copyright (C) 1992-2002 Free Software Foundation, Inc. --
12 -- GNAT is free software; you can redistribute it and/or modify it under --
13 -- terms of the GNU General Public License as published by the Free Soft- --
14 -- ware Foundation; either version 2, or (at your option) any later ver- --
15 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
16 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
17 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
18 -- for more details. You should have received a copy of the GNU General --
19 -- Public License distributed with GNAT; see file COPYING. If not, write --
20 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
21 -- MA 02111-1307, USA. --
23 -- As a special exception, if other files instantiate generics from this --
24 -- unit, or you link this unit with other files to produce an executable, --
25 -- this unit does not by itself cause the resulting executable to be --
26 -- covered by the GNU General Public License. This exception does not --
27 -- however invalidate any other reasons why the executable file might be --
28 -- covered by the GNU Public License. --
30 -- GNAT was originally developed by the GNAT team at New York University. --
31 -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
33 ------------------------------------------------------------------------------
35 -- This package contains the input routines used for reading the
36 -- input source file. The actual I/O routines are in OS_Interface,
37 -- with this module containing only the system independent processing.
39 -- General Note: throughout the compiler, we use the term line or source
40 -- line to refer to a physical line in the source, terminated by the end of
41 -- physical line sequence. See Skip_Line_Terminators procedure for a full
42 -- description of the difference between logical and physical lines.
45 with Casing; use Casing;
47 with Types; use Types;
51 ----------------------------
52 -- Source License Control --
53 ----------------------------
55 -- The following type indicates the license state of a source if it
60 -- Licensing status of this source unit is unknown
63 -- This is a non-GPL'ed unit that is restricted from depending
64 -- on GPL'ed units (e.g. proprietary code is in this category)
67 -- This file is licensed under the unmodified GPL. It is not allowed
68 -- to depend on Non_GPL units, and Non_GPL units may not depend on
72 -- This file is licensed under the GNAT modified GPL (see header of
73 -- This file for wording of the modification). It may depend on other
74 -- Modified_GPL units or on unrestricted units.
77 -- The license on this file is permitted to depend on any other
78 -- units, or have other units depend on it, without violating the
79 -- license of this unit. Examples are public domain units, and
80 -- units defined in the RM).
82 -- The above license status is checked when the appropriate check is
83 -- activated and one source depends on another, and the licensing state
84 -- of both files is known:
86 -- The prohibited combinations are:
88 -- Restricted file may not depend on GPL file
90 -- GPL file may not depend on Restricted file
92 -- Modified GPL file may not depend on Restricted file
93 -- Modified_GPL file may not depend on GPL file
95 -- The reason for the last restriction here is that a client depending
96 -- on a modified GPL file must be sure that the license condition is
97 -- correct considered transitively.
99 -- The licensing status is determined either by the presence of a
100 -- specific pragma License, or by scanning the header for a predefined
101 -- file, or any file if compiling in -gnatg mode.
103 -----------------------
104 -- Source File Table --
105 -----------------------
107 -- The source file table has an entry for each source file read in for
108 -- this run of the compiler. This table is (default) initialized when
109 -- the compiler is loaded, and simply accumulates entries as compilation
110 -- proceeds and the Sinput.L.Load_Source_File procedure is called to load
111 -- required source files.
113 -- Virtual entries are also created for generic templates when they are
114 -- instantiated, as described in a separate section later on.
116 -- In the case where there are multiple main units (e.g. in the case of
117 -- the cross-reference tool), this table is not reset between these units,
118 -- so that a given source file is only read once if it is used by two
119 -- separate main units.
121 -- The entries in the table are accessed using a Source_File_Index that
122 -- ranges from 1 to Last_Source_File. Each entry has the following fields
124 -- Note that entry 1 is always for system.ads (see Targparm for details
125 -- of why we always read this source file first), and we have defined a
126 -- constant Types.System_Source_File_Index as 1 to reflect this fact.
128 -- File_Name : File_Name_Type
129 -- Name of the source file (simple name with no directory information).
130 -- Set by Sinput.L.Load_Source_File and cannot be subequently changed.
132 -- Full_File_Name : File_Name_Type
133 -- Full file name (full name with directory info), used for generation
134 -- of error messages, etc. Set by Sinput.L.Load_Source_File and cannot
135 -- be subsequently changed.
137 -- Reference_Name : File_Name_Type
138 -- Name to be used for source file references in error messages where
139 -- only the simple name of the file is required. Identical to File_Name
140 -- unless pragma Source_Reference is used to change it. Only processing
141 -- for the Source_Reference pragma circuit may set this field.
143 -- Full_Ref_Name : File_Name_Type
144 -- Name to be used for source file references in error messages where
145 -- the full name of the file is required. Identical to Full_File_Name
146 -- unless pragma Source_Reference is used to change it. Only processing
147 -- for the Source_Reference pragma may set this field.
149 -- Debug_Source_Name : File_Name_Type
150 -- Name to be used for source file references in debugging information
151 -- where only the simple name of the file is required. Identical to
152 -- Full_Ref_Name unless the -gnatD (debug source file) switch is used.
153 -- Only processing in Sprint that generates this file is permitted to
156 -- License : License_Type;
157 -- License status of source file
159 -- Num_SRef_Pragmas : Nat;
160 -- Number of source reference pragmas present in source file
162 -- First_Mapped_Line : Logical_Line_Number;
163 -- This field stores logical line number of the first line in the
164 -- file that is not a Source_Reference pragma. If no source reference
165 -- pragmas are used, then the value is set to No_Line_Number.
167 -- Source_Text : Source_Buffer_Ptr
168 -- Text of source file. Note that every source file has a distinct set
169 -- of non-overlapping logical bounds, so it is possible to determine
170 -- which file is referenced from a given subscript (Source_Ptr) value.
171 -- Set by Sinput.L.Load_Source_File and cannot be subsequently changed.
173 -- Source_First : Source_Ptr;
174 -- Subscript of first character in Source_Text. Note that this cannot
175 -- be obtained as Source_Text'First, because we use virtual origin
176 -- addressing. Set by Sinput.L procedures when the entry is first
177 -- created and never subsequently changed.
179 -- Source_Last : Source_Ptr;
180 -- Subscript of last character in Source_Text. Note that this cannot
181 -- be obtained as Source_Text'Last, because we use virtual origin
182 -- addressing, so this value is always Source_Ptr'Last. Set by
183 -- Sinput.L procedures when the entry is first created and never
184 -- subsequently changed.
186 -- Time_Stamp : Time_Stamp_Type;
187 -- Time stamp of the source file. Set by Sinput.L.Load_Source_File,
188 -- and cannot be subsequently changed.
190 -- Source_Checksum : Word;
191 -- Computed checksum for contents of source file. See separate section
192 -- later on in this spec for a description of the checksum algorithm.
194 -- Last_Source_Line : Physical_Line_Number;
195 -- Physical line number of last source line. Whlie a file is being
196 -- read, this refers to the last line scanned. Once a file has been
197 -- completely scanned, it is the number of the last line in the file,
198 -- and hence also gives the number of source lines in the file.
200 -- Keyword_Casing : Casing_Type;
201 -- Casing style used in file for keyword casing. This is initialized
202 -- to Unknown, and then set from the first occurrence of a keyword.
203 -- This value is used only for formatting of error messages.
205 -- Identifier_Casing : Casing_Type;
206 -- Casing style used in file for identifier casing. This is initialized
207 -- to Unknown, and then set from an identifier in the program as soon as
208 -- one is found whose casing is sufficiently clear to make a decision.
209 -- This value is used for formatting of error messages, and also is used
210 -- in the detection of keywords misused as identifiers.
212 -- Instantiation : Source_Ptr;
213 -- Source file location of the instantiation if this source file entry
214 -- represents a generic instantiation. Set to No_Location for the case
215 -- of a normal non-instantiation entry. See section below for details.
216 -- This field is read-only for clients.
218 -- Template : Source_File_Index;
219 -- Source file index of the source file containing the template if this
220 -- is a generic instantiation. Set to No_Source_File for the normal case
221 -- of a non-instantiation entry. See Sinput-L for details. This field is
222 -- read-only for clients.
224 -- The source file table is accessed by clients using the following
225 -- subprogram interface:
227 subtype SFI is Source_File_Index;
229 function Debug_Source_Name (S : SFI) return File_Name_Type;
230 function File_Name (S : SFI) return File_Name_Type;
231 function First_Mapped_Line (S : SFI) return Logical_Line_Number;
232 function Full_File_Name (S : SFI) return File_Name_Type;
233 function Full_Ref_Name (S : SFI) return File_Name_Type;
234 function Identifier_Casing (S : SFI) return Casing_Type;
235 function Instantiation (S : SFI) return Source_Ptr;
236 function Keyword_Casing (S : SFI) return Casing_Type;
237 function Last_Source_Line (S : SFI) return Physical_Line_Number;
238 function License (S : SFI) return License_Type;
239 function Num_SRef_Pragmas (S : SFI) return Nat;
240 function Reference_Name (S : SFI) return File_Name_Type;
241 function Source_Checksum (S : SFI) return Word;
242 function Source_First (S : SFI) return Source_Ptr;
243 function Source_Last (S : SFI) return Source_Ptr;
244 function Source_Text (S : SFI) return Source_Buffer_Ptr;
245 function Template (S : SFI) return Source_File_Index;
246 function Time_Stamp (S : SFI) return Time_Stamp_Type;
248 procedure Set_Keyword_Casing (S : SFI; C : Casing_Type);
249 procedure Set_Identifier_Casing (S : SFI; C : Casing_Type);
250 procedure Set_License (S : SFI; L : License_Type);
252 function Last_Source_File return Source_File_Index;
253 -- Index of last source file table entry
255 function Num_Source_Files return Nat;
256 -- Number of source file table entries
258 procedure Initialize;
259 -- Initialize internal tables
262 -- Lock internal tables
264 Main_Source_File : Source_File_Index;
265 -- This is set to the source file index of the main unit
267 -----------------------
268 -- Checksum Handling --
269 -----------------------
271 -- As a source file is scanned, a checksum is computed by taking all the
272 -- non-blank characters in the file, excluding comment characters, the
273 -- minus-minus sequence starting a comment, and all control characters
276 -- The checksum algorithm used is the standard CRC-32 algorithm, as
277 -- implemented by System.CRC32, except that we do not bother with the
278 -- final XOR with all 1 bits.
280 -- This algorithm ensures that the checksum includes all semantically
281 -- significant aspects of the program represented by the source file,
282 -- but is insensitive to layout, presence or contents of comments, wide
283 -- character representation method, or casing conventions outside strings.
285 -- Scans.Checksum is initialized appropriately at the start of scanning
286 -- a file, and copied into the Source_Checksum field of the file table
287 -- entry when the end of file is encountered.
289 -------------------------------------
290 -- Handling Generic Instantiations --
291 -------------------------------------
293 -- As described in Sem_Ch12, a generic instantiation involves making a
294 -- copy of the tree of the generic template. The source locations in
295 -- this tree directly reference the source of the template. However it
296 -- is also possible to find the location of the instantiation.
298 -- This is achieved as follows. When an instantiation occurs, a new entry
299 -- is made in the source file table. This entry points to the same source
300 -- text, i.e. the file that contains the instantiation, but has a distinct
301 -- set of Source_Ptr index values. The separate range of Sloc values avoids
302 -- confusion, and means that the Sloc values can still be used to uniquely
303 -- identify the source file table entry. It is possible for both entries
304 -- to point to the same text, because of the virtual origin pointers used
305 -- in the source table.
307 -- The Instantiation field of this source file index entry, usually set
308 -- to No_Source_File, instead contains the Sloc of the instantiation. In
309 -- the case of nested instantiations, this Sloc may itself refer to an
310 -- instantiation, so the complete chain can be traced.
312 -- Two routines are used to build these special entries in the source
313 -- file table. Create_Instantiation_Source is first called to build
314 -- the virtual source table entry for the instantiation, and then the
315 -- Sloc values in the copy are adjusted using Adjust_Instantiation_Sloc.
316 -- See child unit Sinput.L for details on these two routines.
322 Current_Source_File : Source_File_Index;
323 -- Source_File table index of source file currently being scanned
325 Current_Source_Unit : Unit_Number_Type;
326 -- Unit number of source file currently being scanned. The special value
327 -- of No_Unit indicates that the configuration pragma file is currently
328 -- being scanned (this has no entry in the unit table).
330 Source_gnat_adc : Source_File_Index := No_Source_File;
331 -- This is set if a gnat.adc file is present to reference this file
333 Source : Source_Buffer_Ptr;
334 -- Current source (copy of Source_File.Table (Current_Source_Unit).Source)
336 Internal_Source : aliased Source_Buffer (1 .. 81);
337 -- This buffer is used internally in the compiler when the lexical analyzer
338 -- is used to scan a string from within the compiler. The procedure is to
339 -- establish Internal_Source_Ptr as the value of Source, set the string to
340 -- be scanned, appropriately terminated, in this buffer, and set Scan_Ptr
341 -- to point to the start of the buffer. It is a fatal error if the scanner
342 -- signals an error while scanning a token in this internal buffer.
344 Internal_Source_Ptr : constant Source_Buffer_Ptr :=
345 Internal_Source'Unrestricted_Access;
346 -- Pointer to internal source buffer
352 procedure Backup_Line (P : in out Source_Ptr);
353 -- Back up the argument pointer to the start of the previous line. On
354 -- entry, P points to the start of a physical line in the source buffer.
355 -- On return, P is updated to point to the start of the previous line.
356 -- The caller has checked that a Line_Terminator character precedes P so
357 -- that there definitely is a previous line in the source buffer.
359 procedure Build_Location_String (Loc : Source_Ptr);
360 -- This function builds a string literal of the form "name:line",
361 -- where name is the file name corresponding to Loc, and line is
362 -- the line number. In the event that instantiations are involved,
363 -- additional suffixes of the same form are appended after the
364 -- separating string " instantiated at ". The returned string is
365 -- stored in Name_Buffer, terminated by ASCII.Nul, with Name_Length
366 -- indicating the length not including the terminating Nul.
368 function Get_Column_Number (P : Source_Ptr) return Column_Number;
369 -- The ones-origin column number of the specified Source_Ptr value is
370 -- determined and returned. Tab characters if present are assumed to
371 -- represent the standard 1,9,17.. spacing pattern.
373 function Get_Logical_Line_Number
375 return Logical_Line_Number;
376 -- The line number of the specified source position is obtained by
377 -- doing a binary search on the source positions in the lines table
378 -- for the unit containing the given source position. The returned
379 -- value is the logical line number, already adjusted for the effect
380 -- of source reference pragmas. If P refers to the line of a source
381 -- reference pragma itself, then No_Line is returned. If no source
382 -- reference pragmas have been encountered, the value returned is
383 -- the same as the physical line number.
385 function Get_Physical_Line_Number
387 return Physical_Line_Number;
388 -- The line number of the specified source position is obtained by
389 -- doing a binary search on the source positions in the lines table
390 -- for the unit containing the given source position. The returned
391 -- value is the physical line number in the source being compiled.
393 function Get_Source_File_Index (S : Source_Ptr) return Source_File_Index;
394 -- Return file table index of file identified by given source pointer
395 -- value. This call must always succeed, since any valid source pointer
396 -- value belongs to some previously loaded source file.
398 function Instantiation_Depth (S : Source_Ptr) return Nat;
399 -- Determine instantiation depth for given Sloc value. A value of
400 -- zero means that the given Sloc is not in an instantiation.
402 function Line_Start (P : Source_Ptr) return Source_Ptr;
403 -- Finds the source position of the start of the line containing the
404 -- given source location.
407 (L : Physical_Line_Number;
408 S : Source_File_Index)
410 -- Finds the source position of the start of the given line in the
411 -- given source file, using a physical line number to identify the line.
413 function Num_Source_Lines (S : Source_File_Index) return Nat;
414 -- Returns the number of source lines (this is equivalent to reading
415 -- the value of Last_Source_Line, but returns Nat rathern than a
416 -- physical line number.
418 procedure Register_Source_Ref_Pragma
419 (File_Name : Name_Id;
420 Stripped_File_Name : Name_Id;
422 Line_After_Pragma : Physical_Line_Number);
423 -- Register a source reference pragma, the parameter File_Name is the
424 -- file name from the pragma, and Stripped_File_Name is this name with
425 -- the directory information stripped. Both these parameters are set
426 -- to No_Name if no file name parameter was given in the pragma.
427 -- (which can only happen for the second and subsequent pragmas).
428 -- Mapped_Line is the line number parameter from the pragma, and
429 -- Line_After_Pragma is the physical line number of the line that
430 -- follows the line containing the Source_Reference pragma.
432 function Original_Location (S : Source_Ptr) return Source_Ptr;
433 -- Given a source pointer S, returns the corresponding source pointer
434 -- value ignoring instantiation copies. For locations that do not
435 -- correspond to instantiation copies of templates, the argument is
436 -- returned unchanged. For locations that do correspond to copies of
437 -- templates from instantiations, the location within the original
438 -- template is returned. This is useful in canonicalizing locations.
440 function Instantiation_Location (S : Source_Ptr) return Source_Ptr;
441 pragma Inline (Instantiation_Location);
442 -- Given a source pointer S, returns the corresponding source pointer
443 -- value of the instantiation if this location is within an instance.
444 -- If S is not within an instance, then this returns No_Location.
446 function Top_Level_Location (S : Source_Ptr) return Source_Ptr;
447 -- Given a source pointer S, returns the argument unchanged if it is
448 -- not in an instantiation. If S is in an instantiation, then it returns
449 -- the location of the top level instantiation, i.e. the outer level
450 -- instantiation in the nested case.
452 function Physical_To_Logical
453 (Line : Physical_Line_Number;
454 S : Source_File_Index)
455 return Logical_Line_Number;
456 -- Given a physical line number in source file whose source index is S,
457 -- return the corresponding logical line number. If the physical line
458 -- number is one containing a Source_Reference pragma, the result will
459 -- be No_Line_Number.
461 procedure Skip_Line_Terminators
462 (P : in out Source_Ptr;
463 Physical : out Boolean);
464 -- On entry, Source (P) points to the line terminator character that
465 -- terminates a line. The result set in P is the location of the first
466 -- character of the following line (after skipping the sequence of line
467 -- terminator characters terminating the current line). In addition, if
468 -- the terminator sequence ends a physical line (the definition of what
469 -- constitutes a physical line is embodied in the implementation of this
470 -- function), and it is the first time this sequence is encountered, then
471 -- an entry is made in the lines table to record the location for further
472 -- use by functions such as Get_Line_Number. Physical is set to True if
473 -- the line terminator was the end of a physical line.
475 function Source_Offset (S : Source_Ptr) return Nat;
476 -- Returns the zero-origin offset of the given source location from the
477 -- start of its corresponding unit. This is used for creating canonical
478 -- names in some situations.
480 procedure Write_Location (P : Source_Ptr);
481 -- Writes out a string of the form fff:nn:cc, where fff, nn, cc are the
482 -- file name, line number and column corresponding to the given source
483 -- location. No_Location and Standard_Location appear as the strings
484 -- <no location> and <standard location>. If the location is within an
485 -- instantiation, then the instance location is appended, enclosed in
486 -- square brackets (which can nest if necessary). Note that this routine
487 -- is used only for internal compiler debugging output purposes (which
488 -- is why the somewhat cryptic use of brackets is acceptable).
490 procedure wl (P : Source_Ptr);
491 pragma Export (Ada, wl);
492 -- Equivalent to Write_Location (P); Write_Eol; for calls from GDB
494 procedure Write_Time_Stamp (S : Source_File_Index);
495 -- Writes time stamp of specified file in YY-MM-DD HH:MM.SS format
497 procedure Tree_Write;
498 -- Writes out internal tables to current tree file using Tree_Write
501 -- Initializes internal tables from current tree file using Tree_Read
504 pragma Inline (File_Name);
505 pragma Inline (First_Mapped_Line);
506 pragma Inline (Full_File_Name);
507 pragma Inline (Identifier_Casing);
508 pragma Inline (Instantiation);
509 pragma Inline (Keyword_Casing);
510 pragma Inline (Last_Source_Line);
511 pragma Inline (Last_Source_File);
512 pragma Inline (License);
513 pragma Inline (Num_SRef_Pragmas);
514 pragma Inline (Num_Source_Files);
515 pragma Inline (Num_Source_Lines);
516 pragma Inline (Reference_Name);
517 pragma Inline (Set_Keyword_Casing);
518 pragma Inline (Set_Identifier_Casing);
519 pragma Inline (Source_First);
520 pragma Inline (Source_Last);
521 pragma Inline (Source_Text);
522 pragma Inline (Template);
523 pragma Inline (Time_Stamp);
525 -------------------------
526 -- Source_Lines Tables --
527 -------------------------
529 type Lines_Table_Type is
530 array (Physical_Line_Number) of Source_Ptr;
531 -- Type used for lines table. The entries are indexed by physical line
532 -- numbers. The values are the starting Source_Ptr values for the start
533 -- of the corresponding physical line. Note that we make this a bogus
534 -- big array, sized as required, so that we avoid the use of fat pointers.
536 type Lines_Table_Ptr is access all Lines_Table_Type;
537 -- Type used for pointers to line tables
539 type Logical_Lines_Table_Type is
540 array (Physical_Line_Number) of Logical_Line_Number;
541 -- Type used for logical lines table. This table is used if a source
542 -- reference pragma is present. It is indexed by physical line numbers,
543 -- and contains the corresponding logical line numbers. An entry that
544 -- corresponds to a source reference pragma is set to No_Line_Number.
545 -- Note that we make this a bogus big array, sized as required, so that
546 -- we avoid the use of fat pointers.
548 type Logical_Lines_Table_Ptr is access all Logical_Lines_Table_Type;
549 -- Type used for pointers to logical line tables.
551 -----------------------
552 -- Source_File Table --
553 -----------------------
555 -- See earlier descriptions for meanings of public fields
557 type Source_File_Record is record
559 File_Name : File_Name_Type;
560 Reference_Name : File_Name_Type;
561 Debug_Source_Name : File_Name_Type;
562 Full_File_Name : File_Name_Type;
563 Full_Ref_Name : File_Name_Type;
564 License : License_Type;
565 Num_SRef_Pragmas : Nat;
566 First_Mapped_Line : Logical_Line_Number;
567 Source_Text : Source_Buffer_Ptr;
568 Source_First : Source_Ptr;
569 Source_Last : Source_Ptr;
570 Time_Stamp : Time_Stamp_Type;
571 Source_Checksum : Word;
572 Last_Source_Line : Physical_Line_Number;
573 Keyword_Casing : Casing_Type;
574 Identifier_Casing : Casing_Type;
575 Instantiation : Source_Ptr;
576 Template : Source_File_Index;
578 -- The following fields are for internal use only (i.e. only in the
579 -- body of Sinput or its children, with no direct access by clients).
581 Sloc_Adjust : Source_Ptr;
582 -- A value to be added to Sloc values for this file to reference the
583 -- corresponding lines table. This is zero for the non-instantiation
584 -- case, and set so that the adition references the ultimate template
585 -- for the instantiation case. See Sinput-L for further details.
587 Lines_Table : Lines_Table_Ptr;
588 -- Pointer to lines table for this source. Updated as additional
589 -- lines are accessed using the Skip_Line_Terminators procedure.
590 -- Note: the lines table for an instantiation entry refers to the
591 -- original line numbers of the template see Sinput-L for details.
593 Logical_Lines_Table : Logical_Lines_Table_Ptr;
594 -- Pointer to logical lines table for this source. Non-null only if
595 -- a source reference pragma has been processed. Updated as lines
596 -- are accessed using the Skip_Line_Terminators procedure.
598 Lines_Table_Max : Physical_Line_Number;
599 -- Maximum subscript values for currently allocated Lines_Table
600 -- and (if present) the allocated Logical_Lines_Table. The value
601 -- Max_Source_Line gives the maximum used value, this gives the
602 -- maximum allocated value.
606 package Source_File is new Table.Table (
607 Table_Component_Type => Source_File_Record,
608 Table_Index_Type => Source_File_Index,
609 Table_Low_Bound => 1,
610 Table_Initial => Alloc.Source_File_Initial,
611 Table_Increment => Alloc.Source_File_Increment,
612 Table_Name => "Source_File");
618 procedure Alloc_Line_Tables
619 (S : in out Source_File_Record;
621 -- Allocate or reallocate the lines table for the given source file so
622 -- that it can accommodate at least New_Max lines. Also allocates or
623 -- reallocates logical lines table if source ref pragmas are present.
625 procedure Add_Line_Tables_Entry
626 (S : in out Source_File_Record;
628 -- Increment line table size by one (reallocating the lines table if
629 -- needed) and set the new entry to contain the value P. Also bumps
630 -- the Source_Line_Count field. If source reference pragmas are
631 -- present, also increments logical lines table size by one, and
634 procedure Trim_Lines_Table (S : Source_File_Index);
635 -- Set lines table size for entry S in the source file table to
636 -- correspond to the current value of Num_Source_Lines, releasing
637 -- any unused storage. This is used by Sinput.L and Sinput.D.
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