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%---------------------------------------------------------------------------%
% Copyright (C) 2000 The University of Melbourne.
% This file may only be copied under the terms of the GNU General
% Public License - see the file COPYING in the Mercury distribution.
%---------------------------------------------------------------------------%
%
% File: static_term.m.
% Author: zs.
%
% This module handles the conversion of Mercury terms in the compiler
% into rvals we can give to llds_out.m in order to make those terms available
% at runtime in the program being compiled.
%
%---------------------------------------------------------------------------%
:- module static_term.
:- interface.
:- import_module llds.
:- import_module counter, std_util.
:- pred static_term__term_to_rval(univ::in, maybe(rval)::out,
counter::in, counter::out) is det.
%---------------------------------------------------------------------------%
:- implementation.
:- import_module builtin_ops.
:- import_module list, require.
static_term__term_to_rval(Univ, Rval, CellCounter0, CellCounter) :-
( std_util__get_functor_info(Univ, FunctorInfo) ->
static_term__functor_info_to_rval(FunctorInfo, Rval,
CellCounter0, CellCounter)
;
error("static_term__term_to_rval: unexpected kind of term")
).
:- pred static_term__functor_info_to_rval(functor_tag_info::in,
maybe(rval)::out, counter::in, counter::out) is det.
static_term__functor_info_to_rval(FunctorInfo, MaybeRval,
CellCounter0, CellCounter) :-
(
FunctorInfo = functor_integer(Int),
MaybeRval = yes(const(int_const(Int))),
CellCounter = CellCounter0
;
FunctorInfo = functor_float(Float),
MaybeRval = yes(const(float_const(Float))),
CellCounter = CellCounter0
;
FunctorInfo = functor_string(String),
MaybeRval = yes(const(string_const(String))),
CellCounter = CellCounter0
;
FunctorInfo = functor_enum(Enum),
MaybeRval = yes(const(int_const(Enum))),
CellCounter = CellCounter0
;
FunctorInfo = functor_local(Ptag, Sectag),
MaybeRval = yes(mkword(Ptag,
unop(mkbody, const(int_const(Sectag))))),
CellCounter = CellCounter0
;
FunctorInfo = functor_remote(Ptag, Sectag, Args),
MaybeSectagRval = yes(const(int_const(Sectag))),
list__map_foldl(static_term__term_to_rval,
Args, MaybeArgRvals, CellCounter0, CellCounter1),
counter__allocate(CNum, CellCounter1, CellCounter),
Reuse = no,
MaybeRval = yes(create(Ptag, [MaybeSectagRval | MaybeArgRvals],
uniform(no), must_be_static, CNum,
"static_term", Reuse))
;
FunctorInfo = functor_unshared(Ptag, Args),
list__map_foldl(static_term__term_to_rval,
Args, MaybeArgRvals, CellCounter0, CellCounter1),
counter__allocate(CNum, CellCounter1, CellCounter),
Reuse = no,
MaybeRval = yes(create(Ptag, MaybeArgRvals,
uniform(no), must_be_static, CNum,
"static_term", Reuse))
;
FunctorInfo = functor_notag(Univ),
static_term__term_to_rval(Univ, MaybeRval,
CellCounter0, CellCounter)
;
FunctorInfo = functor_equiv(Univ),
static_term__term_to_rval(Univ, MaybeRval,
CellCounter0, CellCounter)
).
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