*************************************************************************
Copyright (C) Olivetti 1989
All Rights reserved
Use and copy of this software and preparation of derivative works based
upon this software are permitted to any person, provided this same
copyright notice and the following Olivetti warranty disclaimer are
included in any copy of the software or any modification thereof or
derivative work therefrom made by any person.
This software is made available AS IS and Olivetti disclaims all
warranties with respect to this software, whether expressed or implied
under any law, including all implied warranties of merchantibility and
fitness for any purpose. In no event shall Olivetti be liable for any
damages whatsoever resulting from loss of use, data or profits or
otherwise arising out of or in connection with the use or performance
of this software.
*************************************************************************
Copyright (C) 1994, Digital Equipment Corp.
MODULE M3CUnit EXPORTS M3CUnit, M3AST_FE, M3CUnitRep;
IMPORT Rd, Fmt, Err, OSError, Atom, FS, Pathname, FileRd;
IMPORT M3Extension, M3FindFile;
IMPORT M3Conventions;
IMPORT M3AST_AS;
IMPORT M3AST_AS_F, M3AST_SM_F;
TYPE ExtSet = M3Extension.TSet; Ext = M3Extension.T;
PROCEDURE FindUnit(
f: M3FindFile.T;
name: TEXT;
unitType: Type;
VAR (*inout*) uf: Form;
VAR id: Uid)
: Rd.T
RAISES {OSError.E} =
VAR
m3Exts: ExtSet;
result: Rd.T;
t: M3Extension.T;
pn: Pathname.T;
BEGIN
IF unitType = Type.Interface THEN
IF uf # Form.Source THEN m3Exts := ExtSet{Ext.PInt}
ELSE m3Exts := M3Extension.Ints;
END;
ELSE m3Exts := M3Extension.Mods
END;
IF M3Extension.Has(name, t) AND t # M3Extension.T.Null THEN
result := FileRd.Open(name);
pn := name;
ELSE
(* strip to module name *)
name := Pathname.Base(name);
result := OpenFromSet(f, name, m3Exts, pn);
END;
IF (result = NIL) AND (uf # Form.Source) THEN
IF unitType = Type.Interface THEN
m3Exts := M3Extension.Ints;
result := OpenFromSet(f, name, m3Exts, pn);
END;
END;
IF result # NIL THEN
id := NEW(Uid, filename := pn);
IF NOT (Ext.PInt IN m3Exts) THEN
TRY
WITH status = FS.Status(pn) DO
id.stamp := status.modificationTime;
END;
EXCEPT
| OSError.E(t) =>
Err.Print(Fmt.F("problem reading timestamp for %s - %s",
id.filename, Atom.ToText(t.head)), Err.Severity.Error);
result := NIL;
END;
uf := Form.Source;
ELSE
uf := Form.Ast;
END;
END; (* if *)
RETURN result;
END FindUnit;
PROCEDURE OpenFromSet(
f: M3FindFile.T;
name: TEXT;
exts: M3Extension.TSet;
VAR (*out*) pn: Pathname.T)
: Rd.T
RAISES {OSError.E}=
VAR rd: Rd.T := NIL;
BEGIN
FOR ext := FIRST(M3Extension.T) TO LAST(M3Extension.T) DO
IF ext IN exts THEN
TRY
pn := f.find(name, ext);
rd := f.openRead(name, ext);
EXIT;
EXCEPT
| M3FindFile.Failed =>
END;
END; (* if *)
END; (* for *)
RETURN rd;
END OpenFromSet;
PROCEDURE FindStandard(
f: M3FindFile.T;
VAR uf: Form;
VAR id: Uid
): Rd.T RAISES {OSError.E} =
BEGIN
RETURN FindUnit(f, M3Conventions.Standard, Type.Interface, uf, id);
END FindStandard;
PROCEDURE TextName(id: Uid): TEXT RAISES {} =
BEGIN
RETURN id^.filename;
END TextName;
PROCEDURE TypeName(ut: Type): TEXT RAISES {} =
BEGIN
CASE ut OF
| Type.Interface => RETURN "interface";
| Type.Module => RETURN "module";
| Type.Interface_gen_def => RETURN "generic interface"
| Type.Interface_gen_ins => RETURN "instantiated interface"
| Type.Module_gen_def => RETURN "generic module"
| Type.Module_gen_ins => RETURN "instantiated module"
(*ELSE crash *)
END;
END TypeName;
EXCEPTION NullUNIT;
PROCEDURE ToType(u: M3AST_AS.UNIT): Type RAISES {}=
<*FATAL NullUNIT*>
BEGIN
TYPECASE u OF <*NOWARN*>
| NULL => RAISE NullUNIT;
| M3AST_AS.Interface => RETURN Type.Interface;
| M3AST_AS.Module => RETURN Type.Module;
| M3AST_AS.Interface_gen_def => RETURN Type.Interface_gen_def;
| M3AST_AS.Module_gen_def => RETURN Type.Module_gen_def;
| M3AST_AS.Interface_gen_ins => RETURN Type.Interface_gen_ins;
| M3AST_AS.Module_gen_ins => RETURN Type.Module_gen_ins;
END;
END ToType;
PROCEDURE ToGenIns(cu: M3AST_AS.Compilation_Unit;
VAR (*inout*) ut: Type): M3AST_AS.Compilation_Unit RAISES {}=
BEGIN
TYPECASE cu.as_root OF
| M3AST_AS.UNIT_GEN_INS(unit_ins) =>
cu := unit_ins.sm_ins_comp_unit;
IF cu # NIL THEN
IF ISTYPE(cu.as_root, M3AST_AS.Interface) THEN ut := Type.Interface
ELSE ut := Type.Module
END;
END;
ELSE
END; (* typecase *)
RETURN cu
END ToGenIns;
PROCEDURE Equal(id1, id2: Uid): BOOLEAN=
BEGIN
RETURN id1.stamp = id2.stamp;
END Equal;
<*INLINE*> PROCEDURE InclState(VAR status: Status; state: State) RAISES {}=
BEGIN
status := status + Status{state};
END InclState;
<*INLINE*> PROCEDURE ExclState(VAR status: Status; state: State) RAISES {}=
BEGIN
status := status - Status{state};
END ExclState;
BEGIN
END M3CUnit.