1 ------------------------------------------------------------------------------
3 -- GNAT SYSTEM UTILITIES --
10 -- Copyright (C) 1992-2001 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 -- GNAT was originally developed by the GNAT team at New York University. --
24 -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
26 ------------------------------------------------------------------------------
28 -- Program to construct C header file a-einfo.h (C version of einfo.ads spec)
29 -- for use by Gigi. This header file contaInF all definitions and access
30 -- functions, but does not contain set procedures, since Gigi is not allowed
31 -- to modify the GNAT tree)
35 -- einfo.ads spec of Einfo package
36 -- einfo.adb body of Einfo package
40 -- a-einfo.h Corresponding c header file
42 -- Note: It is assumed that the input files have been compiled without errors
44 -- An optional argument allows the specification of an output file name to
45 -- override the default a-einfo.h file name for the generated output file.
47 -- Most, but not all of the functions in Einfo can be inlined in the C header.
48 -- They are the functions identified by pragma Inline in the spec. Functions
49 -- that cannot be inlined are simply defined in the header.
51 with Ada.Command_Line; use Ada.Command_Line;
52 with Ada.Strings.Unbounded; use Ada.Strings.Unbounded;
53 with Ada.Strings.Unbounded.Text_IO; use Ada.Strings.Unbounded.Text_IO;
54 with Ada.Strings.Maps; use Ada.Strings.Maps;
55 with Ada.Strings.Maps.Constants; use Ada.Strings.Maps.Constants;
56 with Ada.Text_IO; use Ada.Text_IO;
58 with GNAT.Spitbol; use GNAT.Spitbol;
59 with GNAT.Spitbol.Patterns; use GNAT.Spitbol.Patterns;
60 with GNAT.Spitbol.Table_Boolean; use GNAT.Spitbol.Table_Boolean;
64 package TB renames GNAT.Spitbol.Table_Boolean;
71 Expr : VString := Nul;
72 Filler : VString := Nul;
73 Fline : VString := Nul;
74 Formal : VString := Nul;
75 Formaltyp : VString := Nul;
77 Line : VString := Nul;
83 Name : VString := Nul;
84 NewS : VString := Nul;
85 Nextlin : VString := Nul;
86 OldS : VString := Nul;
88 Term : VString := Nul;
91 -- Used to read full text of both spec and body
94 -- Used to write output file
96 wsp : Pattern := NSpan (' ' & ASCII.HT);
97 Comment : Pattern := wsp & "--";
98 For_Rep : Pattern := wsp & "for";
99 Get_Func : Pattern := wsp * A & "function" & wsp & Break (' ') * Name;
100 Inline : Pattern := wsp & "pragma Inline (" & Break (')') * Name;
101 Get_Pack : Pattern := wsp & "package ";
102 Get_Enam : Pattern := wsp & Break (',') * N & ',';
103 Find_Fun : Pattern := wsp & "function";
104 F_Subtyp : Pattern := wsp * A & "subtype " & Break (' ') * N;
105 G_Subtyp : Pattern := wsp & "subtype" & wsp & Break (' ') * NewS
106 & wsp & "is" & wsp & Break (" ;") * OldS
107 & wsp & ';' & wsp & Rtab (0);
108 F_Typ : Pattern := wsp * A & "type " & Break (' ') * N & " is (";
109 Get_Nam : Pattern := wsp * A & Break (",)") * Nam & Len (1) * Term;
110 Get_Styp : Pattern := wsp * A & "subtype " & Break (' ') * N;
111 Get_N1 : Pattern := wsp & Break (' ') * N1;
112 Get_N2 : Pattern := wsp & "-- " & Rest * N2;
113 Get_N3 : Pattern := wsp & Break (';') * N3;
114 Get_FN : Pattern := wsp * C & "function" & wsp & Break (" (") * FN;
115 Is_Rturn : Pattern := BreakX ('r') & "return";
116 Is_Begin : Pattern := wsp & "begin";
117 Get_Asrt : Pattern := wsp & "pragma Assert";
118 Semicoln : Pattern := BreakX (';');
119 Get_Cmnt : Pattern := BreakX ('-') * A & "--";
120 Get_Expr : Pattern := wsp & "return " & Break (';') * Expr;
121 Chek_End : Pattern := wsp & "end" & BreakX (';') & ';';
122 Get_B1 : Pattern := BreakX (' ') * A & " in " & Rest * B;
123 Get_B2 : Pattern := BreakX (' ') * A & " = " & Rest * B;
124 Get_B3 : Pattern := BreakX (' ') * A & " /= " & Rest * B;
125 To_Paren : Pattern := wsp * Filler & '(';
126 Get_Fml : Pattern := Break (" :") * Formal & wsp & ':' & wsp
127 & BreakX (" );") * Formaltyp;
128 Nxt_Fml : Pattern := wsp & "; ";
129 Get_Rtn : Pattern := wsp & "return" & wsp & BreakX (" ;") * Rtn;
130 Rem_Prn : Pattern := wsp & ')';
134 Lineno : Natural := 0;
135 -- Line number in spec
140 Inlined : TB.Table (200);
141 -- Inlined<N> = True for inlined function, False otherwise
143 Lastinlined : Boolean;
146 -- Signal bad function in body
148 function Getlin return VString;
149 -- Get non-comment line (comment lines skipped, also skips FOR rep clauses)
150 -- Fatal error (raises End_Error exception) if end of file encountered
152 procedure Must (B : Boolean);
153 -- Raises Err if the argument (a Match) call, returns False
155 procedure Sethead (Line : in out VString; Term : String);
156 -- Process function header into C
166 "Body for function " & FN & " does not meet requirements");
174 function Getlin return VString is
179 Lin := Get_Line (InF);
180 Lineno := Lineno + 1;
183 and then not Match (Lin, Comment)
184 and then not Match (Lin, For_Rep)
195 procedure Must (B : Boolean) is
206 procedure Sethead (Line : in out VString; Term : String) is
210 Must (Match (Line, Get_Func, ""));
213 if Match (Line, To_Paren, "") then
214 Args := Filler & '(';
217 Must (Match (Line, Get_Fml, ""));
218 Append (Args, Formaltyp & ' ' & Formal);
219 exit when not Match (Line, Nxt_Fml);
223 Match (Line, Rem_Prn, "");
227 Must (Match (Line, Get_Rtn));
229 if Present (Inlined, Name) then
230 Put_Line (Ofile, A & "INLINE " & Rtn & ' ' & Name & Args & Term);
232 Put_Line (Ofile, A & Rtn & ' ' & Name & Args & Term);
236 -- Start of processing for XEinfo
239 Anchored_Mode := True;
241 if Argument_Count > 0 then
242 Create (Ofile, Out_File, Argument (1));
244 Create (Ofile, Out_File, "a-einfo.h");
247 Open (InF, In_File, "einfo.ads");
251 -- Write header to output file
254 Line := Get_Line (InF);
255 Lineno := Lineno + 1;
260 "-- C Header File ");
262 Match (Line, "--", "/*");
263 Match (Line, Rtab (2) * A & "--", M);
264 Replace (M, A & "*/");
265 Put_Line (Ofile, Line);
268 Put_Line (Ofile, "");
270 -- Find and record pragma Inlines
273 Line := Get_Line (InF);
274 exit when Match (Line, " -- END XEINFO INLINES");
276 if Match (Line, Inline) then
277 Set (Inlined, Name, True);
281 -- Skip to package line
283 Reset (InF, In_File);
288 exit when Match (Line, Get_Pack);
293 Must (Match (Line, wsp & "type Entity_Kind"));
295 -- Process entity kind code definitions
299 exit when not Match (Line, Get_Enam);
300 Put_Line (Ofile, " #define " & Rpad (N, 32) & " " & V);
304 Must (Match (Line, wsp & Rest * N));
305 Put_Line (Ofile, " #define " & Rpad (N, 32) & ' ' & V);
308 Must (Match (Line, wsp & ");"));
309 Put_Line (Ofile, "");
311 -- Loop through subtype and type declarations
315 exit when Match (Line, Find_Fun);
317 -- Case of a subtype declaration
319 if Match (Line, F_Subtyp) then
321 -- Case of a subtype declaration that is an abbreviation of the
322 -- form subtype x is y, and if so generate the appropriate typedef
324 if Match (Line, G_Subtyp) then
325 Put_Line (Ofile, A & "typedef " & OldS & ' ' & NewS & ';');
327 -- Otherwise the subtype must be declaring a subrange of Entity_Id
330 Must (Match (Line, Get_Styp));
332 Must (Match (Line, Get_N1));
335 Line := Get_Line (InF);
336 Lineno := Lineno + 1;
337 exit when not Match (Line, Get_N2);
340 Must (Match (Line, Get_N3));
341 Put_Line (Ofile, A & "SUBTYPE (" & N & ", Entity_Kind, ");
342 Put_Line (Ofile, A & " " & N1 & ", " & N3 & ')');
343 Put_Line (Ofile, "");
346 -- Case of type declaration
348 elsif Match (Line, F_Typ) then
349 -- Process type declaration (must be enumeration type)
352 Put_Line (Ofile, A & "typedef char " & N & ';');
356 Must (Match (Line, Get_Nam));
357 Put_Line (Ofile, A & "#define " & Rpad (Nam, 25) & Ctr);
359 exit when Term /= ",";
362 Put_Line (Ofile, "");
364 -- Neither subtype nor type declaration
371 -- Process function declarations
372 -- Note: Lastinlined used to control blank lines
374 Put_Line (Ofile, "");
377 -- Loop through function declarations
379 while Match (Line, Get_FN) loop
381 -- Non-inlined function
383 if not Present (Inlined, FN) then
384 Put_Line (Ofile, "");
387 " #define " & FN & " einfo__" & Translate (FN, Lower_Case_Map));
392 if not Lastinlined then
393 Put_Line (Ofile, "");
397 -- Merge here to output spec
400 Lastinlined := Get (Inlined, FN);
404 Put_Line (Ofile, "");
406 -- Read body to find inlined functions
409 Open (InF, In_File, "einfo.adb");
412 -- Loop through input lines to find bodies of inlined functions
414 while not End_Of_File (InF) loop
415 Fline := Get_Line (InF);
417 if Match (Fline, Get_FN)
418 and then Get (Inlined, FN)
420 -- Here we have an inlined function
422 if not Match (Fline, Is_Rturn) then
429 if not Match (Line, Is_Begin) then
433 -- Skip past pragma Asserts
437 exit when not Match (Line, Get_Asrt);
439 -- Pragma asser found, get its continuation lines
442 exit when Match (Line, Semicoln);
447 -- Process return statement
449 Match (Line, Get_Cmnt, M);
452 -- Get continuations of return statemnt
454 while not Match (Line, Semicoln) loop
456 Match (Nextlin, wsp, " ");
457 Append (Line, Nextlin);
460 if not Match (Line, Get_Expr) then
466 if not Match (Line, Chek_End) then
470 Match (Expr, Get_B1, M);
471 Replace (M, "IN (" & A & ", " & B & ')');
472 Match (Expr, Get_B2, M);
473 Replace (M, A & " == " & B);
474 Match (Expr, Get_B3, M);
475 Replace (M, A & " != " & B);
476 Put_Line (Ofile, "");
478 Put_Line (Ofile, C & " { return " & Expr & "; }");
482 Put_Line (Ofile, "");
485 "/* End of einfo.h (C version of Einfo package specification) */");
489 Put_Line (Standard_Error, Lineno & ". " & Line);
490 Put_Line (Standard_Error, "**** fatal error ****");
494 Put_Line (Standard_Error, "unexpected end of file");
495 Put_Line (Standard_Error, "**** fatal error ****");