mirror of
https://github.com/Mercury-Language/mercury.git
synced 2026-04-15 01:13:30 +00:00
49ffafaa3e
runtime/mercury_deconstruct.c:
Use MR_index_or_search_ptag_layout to search du type layouts by
primary tag and MR_index_or_search_sectag_functor to search
sectag_alternatives by secondary tag, as required for subtypes.
(MR_named_arg_num is used by the debugger.)
313 lines
10 KiB
C
313 lines
10 KiB
C
// vim: ts=4 sw=4 expandtab ft=c
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// Copyright (C) 2002-2007, 2011 The University of Melbourne.
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// Copyright (C) 2013-2018 The Mercury team.
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// This file is distributed under the terms specified in COPYING.LIB.
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// mercury_deconstruct.c
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//
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// This file provides utility functions for deconstructing terms, for use by
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// the standard library.
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#include "mercury_imp.h"
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#include "mercury_deconstruct.h"
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#include "mercury_deconstruct_macros.h"
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#include "mercury_type_desc.h"
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#include "mercury_minimal_model.h"
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// We reserve a buffer to hold the names we dynamically generate
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// for "functors" of foreign types. This macro gives its size.
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#define MR_FOREIGN_NAME_BUF_SIZE 256
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static MR_ConstString MR_expand_type_name(MR_TypeCtorInfo tci, MR_bool);
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#define EXPAND_FUNCTION_NAME MR_expand_functor_args
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#define EXPAND_TYPE_NAME MR_ExpandFunctorArgsInfo
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#define EXPAND_FUNCTOR_FIELD functor
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#define EXPAND_ARGS
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#include "mercury_ml_expand_body.h"
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#undef EXPAND_FUNCTION_NAME
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#undef EXPAND_TYPE_NAME
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#undef EXPAND_FUNCTOR_FIELD
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#undef EXPAND_ARGS
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#define EXPAND_FUNCTION_NAME MR_expand_functor_args_limit
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#define EXPAND_TYPE_NAME MR_ExpandFunctorArgsLimitInfo
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#define EXPAND_FUNCTOR_FIELD functor
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#define EXPAND_ARGS
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#define EXPAND_APPLY_LIMIT
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#include "mercury_ml_expand_body.h"
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#undef EXPAND_FUNCTION_NAME
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#undef EXPAND_TYPE_NAME
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#undef EXPAND_FUNCTOR_FIELD
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#undef EXPAND_ARGS
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#undef EXPAND_APPLY_LIMIT
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#define EXPAND_FUNCTION_NAME MR_expand_functor_only
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#define EXPAND_TYPE_NAME MR_ExpandFunctorOnlyInfo
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#define EXPAND_FUNCTOR_FIELD functor_only
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#include "mercury_ml_expand_body.h"
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#undef EXPAND_FUNCTION_NAME
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#undef EXPAND_TYPE_NAME
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#undef EXPAND_FUNCTOR_FIELD
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#define EXPAND_FUNCTION_NAME MR_expand_args_only
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#define EXPAND_TYPE_NAME MR_ExpandArgsOnlyInfo
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#define EXPAND_ARGS
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#include "mercury_ml_expand_body.h"
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#undef EXPAND_FUNCTION_NAME
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#undef EXPAND_TYPE_NAME
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#undef EXPAND_ARGS
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#define EXPAND_FUNCTION_NAME MR_expand_chosen_arg_only
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#define EXPAND_TYPE_NAME MR_ExpandChosenArgOnlyInfo
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#define EXPAND_CHOSEN_ARG
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#include "mercury_ml_expand_body.h"
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#undef EXPAND_FUNCTION_NAME
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#undef EXPAND_TYPE_NAME
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#undef EXPAND_CHOSEN_ARG
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#define EXPAND_FUNCTION_NAME MR_expand_named_arg_only
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#define EXPAND_TYPE_NAME MR_ExpandChosenArgOnlyInfo
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#define EXPAND_NAMED_ARG
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#include "mercury_ml_expand_body.h"
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#undef EXPAND_FUNCTION_NAME
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#undef EXPAND_TYPE_NAME
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#undef EXPAND_NAMED_ARG
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// N.B. any modifications to the signature of this function will require
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// changes not only to library/deconstruct.m, but also to library/store.m
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// and extras/trailed_update/tr_store.m.
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MR_bool
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MR_arg(MR_TypeInfo type_info, MR_Word *term_ptr,
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MR_noncanon_handling noncanon, int arg_index,
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MR_TypeInfo *arg_type_info_ptr, MR_Word *arg_term_ptr,
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MR_Word **word_sized_arg_ptr)
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{
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MR_ExpandChosenArgOnlyInfo expand_info;
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MR_expand_chosen_arg_only(type_info, term_ptr, noncanon, arg_index,
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&expand_info);
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if (expand_info.chosen_index_exists) {
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*arg_type_info_ptr = expand_info.chosen_arg_type_info;
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*arg_term_ptr = expand_info.chosen_arg_term;
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*word_sized_arg_ptr = expand_info.chosen_arg_word_sized_ptr;
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return MR_TRUE;
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}
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return MR_FALSE;
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}
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MR_bool
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MR_named_arg(MR_TypeInfo type_info, MR_Word *term_ptr,
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MR_noncanon_handling noncanon, MR_ConstString arg_name,
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MR_TypeInfo *arg_type_info_ptr, MR_Word *arg_term_ptr,
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MR_Word **word_sized_arg_ptr)
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{
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MR_ExpandChosenArgOnlyInfo expand_info;
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MR_expand_named_arg_only(type_info, term_ptr, noncanon, arg_name,
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&expand_info);
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if (expand_info.chosen_index_exists) {
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*arg_type_info_ptr = expand_info.chosen_arg_type_info;
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*arg_term_ptr = expand_info.chosen_arg_term;
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*word_sized_arg_ptr = expand_info.chosen_arg_word_sized_ptr;
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return MR_TRUE;
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}
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return MR_FALSE;
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}
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MR_bool
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MR_named_arg_num(MR_TypeInfo type_info, MR_Word *term_ptr,
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const char *arg_name, int *arg_num_ptr)
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{
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MR_TypeCtorInfo type_ctor_info;
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const MR_DuPtagLayout *ptag_layout;
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const MR_DuFunctorDesc *functor_desc;
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const MR_NotagFunctorDesc *notag_functor_desc;
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MR_Word data;
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int ptag;
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MR_Word sectag;
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MR_TypeInfo eqv_type_info;
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int i;
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type_ctor_info = MR_TYPEINFO_GET_TYPE_CTOR_INFO(type_info);
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if (! MR_type_ctor_has_valid_rep(type_ctor_info)) {
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MR_fatal_error("MR_named_arg_num: term of unknown representation");
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}
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switch (MR_type_ctor_rep(type_ctor_info)) {
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case MR_TYPECTOR_REP_DU_USEREQ:
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case MR_TYPECTOR_REP_DU:
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data = *term_ptr;
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ptag = MR_tag(data);
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MR_index_or_search_ptag_layout(ptag, ptag_layout);
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switch (ptag_layout->MR_sectag_locn) {
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case MR_SECTAG_NONE:
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case MR_SECTAG_NONE_DIRECT_ARG:
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sectag = 0;
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break;
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case MR_SECTAG_LOCAL_REST_OF_WORD:
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sectag = MR_unmkbody(data);
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break;
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case MR_SECTAG_LOCAL_BITS:
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sectag = MR_unmkbody(data) &
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((1 << ptag_layout->MR_sectag_numbits) - 1);
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break;
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case MR_SECTAG_REMOTE_FULL_WORD:
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sectag = MR_field(ptag, data, 0);
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break;
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case MR_SECTAG_REMOTE_BITS:
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sectag = MR_field(ptag, data, 0) &
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((1 << ptag_layout->MR_sectag_numbits) - 1);
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break;
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case MR_SECTAG_VARIABLE:
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MR_fatal_error("MR_named_arg_num(): unexpected variable");
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default:
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MR_fatal_error("MR_named_arg_num(): invalid sectag_locn");
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}
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MR_index_or_search_sectag_functor(ptag_layout, sectag,
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functor_desc);
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if (functor_desc->MR_du_functor_arg_names == NULL) {
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return MR_FALSE;
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}
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for (i = 0; i < functor_desc->MR_du_functor_orig_arity; i++) {
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if (functor_desc->MR_du_functor_arg_names[i] != NULL
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&& MR_streq(arg_name,
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functor_desc->MR_du_functor_arg_names[i]))
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{
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*arg_num_ptr = i;
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return MR_TRUE;
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}
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}
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return MR_FALSE;
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case MR_TYPECTOR_REP_EQUIV:
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eqv_type_info = MR_create_type_info(
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MR_TYPEINFO_GET_FIXED_ARITY_ARG_VECTOR(type_info),
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MR_type_ctor_layout(type_ctor_info).MR_layout_equiv);
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return MR_named_arg_num(eqv_type_info, term_ptr, arg_name,
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arg_num_ptr);
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case MR_TYPECTOR_REP_EQUIV_GROUND:
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eqv_type_info = MR_pseudo_type_info_is_ground(
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MR_type_ctor_layout(type_ctor_info).MR_layout_equiv);
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return MR_named_arg_num(eqv_type_info, term_ptr, arg_name,
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arg_num_ptr);
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case MR_TYPECTOR_REP_NOTAG:
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case MR_TYPECTOR_REP_NOTAG_USEREQ:
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case MR_TYPECTOR_REP_NOTAG_GROUND:
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case MR_TYPECTOR_REP_NOTAG_GROUND_USEREQ:
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notag_functor_desc = MR_type_ctor_functors(type_ctor_info).
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MR_functors_notag;
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if (notag_functor_desc->MR_notag_functor_arg_name != NULL
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&& MR_streq(arg_name,
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notag_functor_desc->MR_notag_functor_arg_name))
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{
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*arg_num_ptr = 0;
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return MR_TRUE;
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}
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return MR_FALSE;
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case MR_TYPECTOR_REP_ENUM:
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case MR_TYPECTOR_REP_ENUM_USEREQ:
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case MR_TYPECTOR_REP_DUMMY:
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case MR_TYPECTOR_REP_INT:
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case MR_TYPECTOR_REP_UINT:
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case MR_TYPECTOR_REP_INT8:
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case MR_TYPECTOR_REP_UINT8:
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case MR_TYPECTOR_REP_INT16:
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case MR_TYPECTOR_REP_UINT16:
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case MR_TYPECTOR_REP_INT32:
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case MR_TYPECTOR_REP_UINT32:
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case MR_TYPECTOR_REP_INT64:
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case MR_TYPECTOR_REP_UINT64:
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case MR_TYPECTOR_REP_FLOAT:
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case MR_TYPECTOR_REP_CHAR:
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case MR_TYPECTOR_REP_STRING:
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case MR_TYPECTOR_REP_BITMAP:
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case MR_TYPECTOR_REP_FUNC:
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case MR_TYPECTOR_REP_PRED:
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case MR_TYPECTOR_REP_SUBGOAL:
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case MR_TYPECTOR_REP_VOID:
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case MR_TYPECTOR_REP_C_POINTER:
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case MR_TYPECTOR_REP_STABLE_C_POINTER:
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case MR_TYPECTOR_REP_TYPEINFO:
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case MR_TYPECTOR_REP_TYPECTORINFO:
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case MR_TYPECTOR_REP_TYPEDESC:
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case MR_TYPECTOR_REP_TYPECTORDESC:
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case MR_TYPECTOR_REP_PSEUDOTYPEDESC:
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case MR_TYPECTOR_REP_TYPECLASSINFO:
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case MR_TYPECTOR_REP_BASETYPECLASSINFO:
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case MR_TYPECTOR_REP_SUCCIP:
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case MR_TYPECTOR_REP_HP:
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case MR_TYPECTOR_REP_CURFR:
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case MR_TYPECTOR_REP_MAXFR:
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case MR_TYPECTOR_REP_REDOFR:
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case MR_TYPECTOR_REP_REDOIP:
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case MR_TYPECTOR_REP_TICKET:
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case MR_TYPECTOR_REP_TRAIL_PTR:
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case MR_TYPECTOR_REP_REFERENCE:
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case MR_TYPECTOR_REP_TUPLE:
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case MR_TYPECTOR_REP_ARRAY:
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case MR_TYPECTOR_REP_FOREIGN:
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case MR_TYPECTOR_REP_STABLE_FOREIGN:
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case MR_TYPECTOR_REP_FOREIGN_ENUM:
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case MR_TYPECTOR_REP_FOREIGN_ENUM_USEREQ:
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case MR_TYPECTOR_REP_UNUSED1:
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case MR_TYPECTOR_REP_UNUSED2:
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case MR_TYPECTOR_REP_UNKNOWN:
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return MR_FALSE;
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}
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MR_fatal_error("MR_named_arg_num: unexpected fallthrough");
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}
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static MR_ConstString
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MR_expand_type_name(MR_TypeCtorInfo tci, MR_bool wrap)
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{
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MR_String str;
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int len;
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len = 0;
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len += strlen(tci->MR_type_ctor_module_name);
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len += 1; // '.'
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len += strlen(tci->MR_type_ctor_name);
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len += 1; // '/'
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len += 4; // arity; we do not support arities above 1024
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if (wrap) {
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len += 4; // <<>>
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}
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len += 1; // NULL
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if (tci->MR_type_ctor_arity > 9999) {
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MR_fatal_error("MR_expand_type_name: arity > 9999");
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}
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MR_restore_transient_hp();
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MR_allocate_aligned_string_msg(str, len, MR_ALLOC_SITE_STRING);
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MR_save_transient_hp();
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sprintf(str, wrap? "<<%s.%s/%d>>" : "%s.%s/%d",
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tci->MR_type_ctor_module_name,
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tci->MR_type_ctor_name,
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(int) tci->MR_type_ctor_arity);
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return (MR_ConstString) str;
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}
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