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|
(* gm2lgen.mod generates the main C function from a list of module names.
Copyright (C) 2001-2025 Free Software Foundation, Inc.
Contributed by Gaius Mulley <gaius.mulley@southwales.ac.uk>.
This file is part of GNU Modula-2.
GNU Modula-2 is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GNU Modula-2 is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Modula-2; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. *)
MODULE gm2lgen ;
(*
Author : Gaius Mulley
Title : gm2lgen
Date : Fri Sep 15 14:42:17 BST 1989
Description: Generates the main C function, from a list of module names.
*)
FROM libc IMPORT exit ;
FROM ASCII IMPORT eof ;
FROM SArgs IMPORT GetArg ;
FROM Indexing IMPORT Index, InitIndex, KillIndex, HighIndice, LowIndice,
IncludeIndiceIntoIndex, GetIndice ;
FROM FIO IMPORT File, StdIn, StdOut, StdErr, WriteChar,
ReadString, WriteString, EOF, IsNoError, WriteLine, Close ;
FROM DynamicStrings IMPORT String, InitString, KillString, ConCat, RemoveWhitePrefix,
EqualArray, Mark, Assign, Fin, InitStringChar, Length, Slice, Equal,
RemoveComment ;
FROM M2Printf IMPORT fprintf0, fprintf1, fprintf2 ;
FROM SFIO IMPORT OpenToWrite, WriteS, ReadS, OpenToRead ;
FROM FormatStrings IMPORT Sprintf0, Sprintf1 ;
CONST
Comment = '#' ; (* Comment leader *)
VAR
CPlusPlus,
SharedLibrary,
NeedInitial,
NeedTerminate,
ExitNeeded : BOOLEAN ;
MainName : String ;
FunctionList : Index ;
fi, fo : File ;
(*
OpenOutputFile - attempts to open an output file.
*)
PROCEDURE OpenOutputFile (s: String) ;
BEGIN
fo := OpenToWrite(s) ;
IF NOT IsNoError(fo)
THEN
fprintf1(StdErr, 'cannot write to: %s\n', s) ;
exit(1)
END
END OpenOutputFile ;
(*
OpenInputFile - attempts to open an input file.
*)
PROCEDURE OpenInputFile (s: String) ;
BEGIN
fi := OpenToRead(s) ;
IF NOT IsNoError(fo)
THEN
fprintf1 (StdErr, 'cannot open: %s\n', s) ;
exit (1)
END
END OpenInputFile ;
(*
DisplayHelp - display brief help and exit.
*)
PROCEDURE DisplayHelp ;
BEGIN
fprintf0 (StdErr, 'gm2lgen [--exit] [-fcpp] [-fshared] [-h] [--help] [--main function]\n');
fprintf0 (StdErr, ' [-o outputfile] [--terminate] [inputfile]\n');
exit (0)
END DisplayHelp ;
(*
ScanArgs -
*)
PROCEDURE ScanArgs ;
VAR
i: CARDINAL ;
s: String ;
BEGIN
i := 1 ;
CPlusPlus := FALSE ;
NeedTerminate := TRUE ;
NeedInitial := TRUE ;
ExitNeeded := TRUE ;
SharedLibrary := FALSE ;
MainName := InitString('main') ;
fi := StdIn ;
fo := StdOut ;
WHILE GetArg(s, i) DO
IF EqualArray(s, '--exit')
THEN
ExitNeeded := FALSE
ELSIF EqualArray(s, '--terminate')
THEN
NeedTerminate := FALSE
ELSIF EqualArray(s, '--initial')
THEN
NeedInitial := FALSE
ELSIF EqualArray(s, '-h') OR EqualArray(s, '--help')
THEN
DisplayHelp
ELSIF EqualArray(s, '-fshared')
THEN
SharedLibrary := TRUE
ELSIF EqualArray(s, '-fcpp')
THEN
CPlusPlus := TRUE
ELSIF EqualArray(s, '-o')
THEN
INC(i) ;
IF GetArg(s, i)
THEN
OpenOutputFile(s)
ELSE
fprintf0(StdErr, 'missing filename option after -o\n') ;
exit(1)
END
ELSIF EqualArray(s, '--main')
THEN
INC(i) ;
IF GetArg(s, i)
THEN
MainName := Assign(MainName, s)
ELSE
fprintf0(StdErr, 'missing functionname after option -main\n') ;
exit(1)
END
ELSE
OpenInputFile(s)
END ;
INC(i)
END
END ScanArgs ;
(*
GenInit -
*)
PROCEDURE GenInit ;
BEGIN
IF SharedLibrary
THEN
Fin(WriteS(fo, Mark(Sprintf0(Mark(InitString('\nvoid __attribute__ ((constructor)) init (void);\n')))))) ;
Fin(WriteS(fo, Mark(Sprintf0(Mark(InitString('\nvoid __attribute__ ((constructor)) init (void)\n'))))))
ELSE
Fin(WriteS(fo, Mark(Sprintf0(Mark(InitString('\nstatic void init (int argc, char *argv[])\n')))))) ;
END ;
Fin(WriteS(fo, Mark(Sprintf0(Mark(InitString('{\n'))))));
GenInitializationCalls ;
Fin(WriteS(fo, Mark(Sprintf0(Mark(InitString('}\n'))))));
END GenInit ;
(*
GenFinish -
*)
PROCEDURE GenFinish ;
BEGIN
IF SharedLibrary
THEN
Fin(WriteS(fo, Mark(Sprintf0(Mark(InitString('\nvoid __attribute__ ((destructor)) finish (void);\n')))))) ;
Fin(WriteS(fo, Mark(Sprintf0(Mark(InitString('\nvoid __attribute__ ((destructor)) finish (void)\n'))))))
ELSE
Fin(WriteS(fo, Mark(Sprintf0(Mark(InitString('\nstatic void finish (void)\n'))))))
END ;
Fin(WriteS(fo, Mark(Sprintf0(Mark(InitString('{\n')))))) ;
GenFinalizationCalls ;
Fin(WriteS(fo, Mark(Sprintf0(Mark(InitString('}\n'))))))
END GenFinish ;
(*
GenMain - writes out the main() function together with module initialization
calls.
*)
PROCEDURE GenMain ;
BEGIN
FunctionList := InitIndex(1) ;
ScanArgs ;
BuildFunctionList ;
GenExternals ;
GenInit ;
GenFinish ;
IF NOT SharedLibrary
THEN
Fin(WriteS(fo, Mark(Sprintf1(Mark(InitString('\nint %s (int argc, char *argv[])\n')), MainName)))) ;
Fin(WriteS(fo, Mark(Sprintf0(Mark(InitString('{\n')))))) ;
Fin(WriteS(fo, Mark(Sprintf0(Mark(InitString(' init (argc, argv);\n')))))) ;
Fin(WriteS(fo, Mark(Sprintf0(Mark(InitString(' finish ();\n')))))) ;
Fin(WriteS(fo, Mark(Sprintf0(Mark(InitString(' return (0);\n')))))) ;
Fin(WriteS(fo, Mark(Sprintf0(Mark(InitString('}\n'))))))
END ;
Close(fo)
END GenMain ;
(*
GenExternals - writes out the external prototypes for each module initializer.
*)
PROCEDURE GenExternals ;
VAR
funcname: String ;
i, n : CARDINAL ;
BEGIN
IF ExitNeeded
THEN
Fin(WriteS(fo, Mark(InitString('extern ')))) ;
IF CPlusPlus
THEN
Fin(WriteS(fo, Mark(InitString('"C"'))))
END ;
Fin(WriteS(fo, Mark(Sprintf0(Mark(InitString(' void exit(int);\n\n')))))) ;
END ;
IF CPlusPlus
THEN
Fin(WriteS(fo, Mark(InitString('extern "C"')))) ;
Fin(WriteS(fo, Mark(Sprintf0(Mark(InitString(' void RTExceptions_DefaultErrorCatch(void);\n'))))))
END ;
n := HighIndice(FunctionList) ;
i := 1 ;
WHILE i<=n DO
funcname := GetIndice(FunctionList, i) ;
Fin(WriteS(fo, Mark(InitString('extern ')))) ;
IF CPlusPlus
THEN
Fin(WriteS(fo, Mark(InitString('"C"'))))
END ;
Fin(WriteS(fo, Mark(Sprintf1(Mark(InitString(' void _M2_%s_init (int argc, char *argv[]);\n')), funcname)))) ;
Fin(WriteS(fo, Mark(InitString('extern ')))) ;
IF CPlusPlus
THEN
Fin(WriteS(fo, Mark(InitString('"C"'))))
END ;
Fin(WriteS(fo, Mark(Sprintf1(Mark(InitString(' void _M2_%s_finish (void);\n')), funcname)))) ;
INC(i)
END ;
IF NeedTerminate
THEN
Fin(WriteS(fo, Mark(Sprintf0(Mark(InitString('\nextern ')))))) ;
IF CPlusPlus
THEN
Fin(WriteS(fo, Mark(InitString('"C"'))))
END ;
Fin(WriteS(fo, Mark(Sprintf0(Mark(InitString(' void M2RTS_ExecuteTerminationProcedures(void);\n'))))))
END ;
IF NeedInitial
THEN
Fin(WriteS(fo, Mark(Sprintf0(Mark(InitString('\nextern ')))))) ;
IF CPlusPlus
THEN
Fin(WriteS(fo, Mark(InitString('"C"'))))
END ;
Fin(WriteS(fo, Mark(Sprintf0(Mark(InitString(' void M2RTS_ExecuteInitialProcedures(void);\n'))))))
END
END GenExternals ;
(*
GenInitializationCalls - writes out the initialization calls for the modules
in the application suit.
*)
PROCEDURE GenInitializationCalls ;
VAR
funcname: String ;
i, n : CARDINAL ;
BEGIN
n := HighIndice(FunctionList) ;
i := LowIndice(FunctionList) ;
IF CPlusPlus
THEN
Fin(WriteS(fo, Mark(Sprintf0(Mark(InitString(' try {\n'))))))
END ;
WHILE i<=n DO
IF i=n
THEN
IF NeedInitial
THEN
IF CPlusPlus
THEN
Fin(WriteS(fo, Mark(Sprintf0(Mark(InitString(' '))))))
END ;
Fin(WriteS(fo, Mark(Sprintf0(Mark(InitString(' M2RTS_ExecuteInitialProcedures ();\n'))))))
END
END ;
funcname := GetIndice(FunctionList, i) ;
IF CPlusPlus
THEN
Fin(WriteS(fo, Mark(InitString(' '))))
END ;
IF SharedLibrary
THEN
Fin(WriteS(fo, Mark(Sprintf1(Mark(InitString(' _M2_%s_init (0, (char **)0);\n')),
funcname))))
ELSE
Fin(WriteS(fo, Mark(Sprintf1(Mark(InitString(' _M2_%s_init (argc, argv);\n')),
funcname))))
END ;
INC(i)
END ;
IF CPlusPlus
THEN
Fin(WriteS(fo, Mark(Sprintf0(Mark(InitString(' }\n')))))) ;
Fin(WriteS(fo, Mark(Sprintf0(Mark(InitString(' catch (...) {\n')))))) ;
Fin(WriteS(fo, Mark(Sprintf0(Mark(InitString(' RTExceptions_DefaultErrorCatch();\n')))))) ;
Fin(WriteS(fo, Mark(Sprintf0(Mark(InitString(' }\n'))))))
END ;
END GenInitializationCalls ;
(*
GenFinalizationCalls - writes out the finalization calls for the modules
in the application suit.
*)
PROCEDURE GenFinalizationCalls ;
VAR
funcname: String ;
i, n : CARDINAL ;
BEGIN
IF CPlusPlus
THEN
Fin(WriteS(fo, Mark(Sprintf0(Mark(InitString(' try {\n'))))))
END ;
IF NeedTerminate
THEN
IF CPlusPlus
THEN
Fin(WriteS(fo, Mark(Sprintf0(Mark(InitString(' '))))))
END ;
Fin(WriteS(fo, Mark(Sprintf0(Mark(InitString(' M2RTS_ExecuteTerminationProcedures ();\n'))))))
END ;
n := HighIndice(FunctionList) ;
i := LowIndice(FunctionList) ;
WHILE i<=n DO
funcname := GetIndice(FunctionList, n) ;
IF CPlusPlus
THEN
Fin(WriteS(fo, Mark(Sprintf0(Mark(InitString(' '))))))
END ;
Fin(WriteS(fo, Mark(Sprintf1(Mark(InitString(' _M2_%s_finish ();\n')),
funcname)))) ;
DEC(n)
END ;
IF ExitNeeded
THEN
IF CPlusPlus
THEN
Fin(WriteS(fo, Mark(Sprintf0(Mark(InitString(' '))))))
END ;
Fin(WriteS(fo, Mark(Sprintf0(Mark(InitString(' exit (0);\n'))))))
END ;
IF CPlusPlus
THEN
Fin(WriteS(fo, Mark(Sprintf0(Mark(InitString(' }\n')))))) ;
Fin(WriteS(fo, Mark(Sprintf0(Mark(InitString(' catch (...) {\n')))))) ;
Fin(WriteS(fo, Mark(Sprintf0(Mark(InitString(' RTExceptions_DefaultErrorCatch();\n')))))) ;
Fin(WriteS(fo, Mark(Sprintf0(Mark(InitString(' }\n'))))))
END
END GenFinalizationCalls ;
(*
BuildFunctionList - reads in the list of functions and stores them.
*)
PROCEDURE BuildFunctionList ;
VAR
s: String ;
BEGIN
REPEAT
s := RemoveComment(RemoveWhitePrefix(ReadS(fi)), Comment) ;
IF (NOT Equal(Mark(InitStringChar(Comment)),
Mark(Slice(s, 0, Length(Mark(InitStringChar(Comment)))-1)))) AND
(NOT EqualArray(s, ''))
THEN
IncludeIndiceIntoIndex(FunctionList, s)
END
UNTIL EOF(fi)
END BuildFunctionList ;
BEGIN
GenMain
END gm2lgen.
|
