479 lines
18 KiB
Rust
479 lines
18 KiB
Rust
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import std::str;
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import std::vec;
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import std::uint;
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import std::io;
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import std::option;
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import std::option::some;
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import std::option::none;
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import std::ebml;
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import front::ast::*;
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import defs::*;
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import middle::trans::crate_ctxt;
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import middle::trans::node_id_type;
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import middle::ty;
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import back::link::crate_export_metas;
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import back::link::crate_local_metas;
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export def_to_str;
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export hash_path;
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export hash_def_id;
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export encode_metadata;
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// Path table encoding
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fn encode_name(&ebml::writer ebml_w, &str name) {
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ebml::start_tag(ebml_w, tag_paths_data_name);
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ebml_w.writer.write(str::bytes(name));
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ebml::end_tag(ebml_w);
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}
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fn encode_def_id(&ebml::writer ebml_w, &def_id id) {
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ebml::start_tag(ebml_w, tag_def_id);
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ebml_w.writer.write(str::bytes(def_to_str(id)));
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ebml::end_tag(ebml_w);
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}
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fn encode_tag_variant_paths(&ebml::writer ebml_w, &vec[variant] variants,
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&vec[str] path,
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&mutable vec[tup(str, uint)] index) {
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for (variant variant in variants) {
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add_to_index(ebml_w, path, index, variant.node.name);
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ebml::start_tag(ebml_w, tag_paths_data_item);
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encode_name(ebml_w, variant.node.name);
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encode_def_id(ebml_w, local_def(variant.node.id));
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ebml::end_tag(ebml_w);
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}
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}
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fn add_to_index(&ebml::writer ebml_w, &vec[str] path,
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&mutable vec[tup(str, uint)] index, &str name) {
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auto full_path = path + [name];
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index += [tup(str::connect(full_path, "::"), ebml_w.writer.tell())];
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}
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fn encode_native_module_item_paths(&ebml::writer ebml_w,
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&native_mod nmod, &vec[str] path,
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&mutable vec[tup(str, uint)] index) {
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for (@native_item nitem in nmod.items) {
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add_to_index(ebml_w, path, index, nitem.ident);
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ebml::start_tag(ebml_w, tag_paths_data_item);
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encode_name(ebml_w, nitem.ident);
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encode_def_id(ebml_w, local_def(nitem.id));
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ebml::end_tag(ebml_w);
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}
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}
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fn encode_module_item_paths(&ebml::writer ebml_w, &_mod module,
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&vec[str] path,
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&mutable vec[tup(str, uint)] index) {
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for (@item it in module.items) {
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if (!is_exported(it.ident, module)) { cont; }
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alt (it.node) {
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case (item_const(_, _)) {
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add_to_index(ebml_w, path, index, it.ident);
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ebml::start_tag(ebml_w, tag_paths_data_item);
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encode_name(ebml_w, it.ident);
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encode_def_id(ebml_w, local_def(it.id));
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ebml::end_tag(ebml_w);
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}
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case (item_fn(_, ?tps)) {
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add_to_index(ebml_w, path, index, it.ident);
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ebml::start_tag(ebml_w, tag_paths_data_item);
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encode_name(ebml_w, it.ident);
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encode_def_id(ebml_w, local_def(it.id));
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ebml::end_tag(ebml_w);
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}
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case (item_mod(?_mod)) {
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add_to_index(ebml_w, path, index, it.ident);
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ebml::start_tag(ebml_w, tag_paths_data_mod);
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encode_name(ebml_w, it.ident);
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encode_def_id(ebml_w, local_def(it.id));
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encode_module_item_paths(ebml_w, _mod, path + [it.ident],
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index);
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ebml::end_tag(ebml_w);
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}
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case (item_native_mod(?nmod)) {
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add_to_index(ebml_w, path, index, it.ident);
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ebml::start_tag(ebml_w, tag_paths_data_mod);
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encode_name(ebml_w, it.ident);
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encode_def_id(ebml_w, local_def(it.id));
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encode_native_module_item_paths(ebml_w, nmod,
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path + [it.ident], index);
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ebml::end_tag(ebml_w);
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}
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case (item_ty(_, ?tps)) {
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add_to_index(ebml_w, path, index, it.ident);
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ebml::start_tag(ebml_w, tag_paths_data_item);
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encode_name(ebml_w, it.ident);
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encode_def_id(ebml_w, local_def(it.id));
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ebml::end_tag(ebml_w);
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}
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case (item_res(_, _, ?tps, ?ctor_id)) {
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add_to_index(ebml_w, path, index, it.ident);
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ebml::start_tag(ebml_w, tag_paths_data_item);
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encode_name(ebml_w, it.ident);
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encode_def_id(ebml_w, local_def(ctor_id));
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ebml::end_tag(ebml_w);
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add_to_index(ebml_w, path, index, it.ident);
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ebml::start_tag(ebml_w, tag_paths_data_item);
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encode_name(ebml_w, it.ident);
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encode_def_id(ebml_w, local_def(it.id));
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ebml::end_tag(ebml_w);
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}
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case (item_tag(?variants, ?tps)) {
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add_to_index(ebml_w, path, index, it.ident);
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ebml::start_tag(ebml_w, tag_paths_data_item);
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encode_name(ebml_w, it.ident);
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encode_def_id(ebml_w, local_def(it.id));
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ebml::end_tag(ebml_w);
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encode_tag_variant_paths(ebml_w, variants, path, index);
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}
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case (item_obj(_, ?tps, ?ctor_id)) {
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add_to_index(ebml_w, path, index, it.ident);
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ebml::start_tag(ebml_w, tag_paths_data_item);
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encode_name(ebml_w, it.ident);
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encode_def_id(ebml_w, local_def(ctor_id));
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ebml::end_tag(ebml_w);
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add_to_index(ebml_w, path, index, it.ident);
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ebml::start_tag(ebml_w, tag_paths_data_item);
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encode_name(ebml_w, it.ident);
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encode_def_id(ebml_w, local_def(it.id));
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ebml::end_tag(ebml_w);
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}
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}
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}
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}
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fn encode_item_paths(&ebml::writer ebml_w, &@crate crate) ->
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vec[tup(str, uint)] {
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let vec[tup(str, uint)] index = [];
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let vec[str] path = [];
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ebml::start_tag(ebml_w, tag_paths);
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encode_module_item_paths(ebml_w, crate.node.module, path, index);
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ebml::end_tag(ebml_w);
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ret index;
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}
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// Item info table encoding
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fn encode_kind(&ebml::writer ebml_w, u8 c) {
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ebml::start_tag(ebml_w, tag_items_data_item_kind);
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ebml_w.writer.write([c]);
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ebml::end_tag(ebml_w);
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}
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fn def_to_str(&def_id did) -> str { ret #fmt("%d:%d", did._0, did._1); }
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fn encode_type_param_count(&ebml::writer ebml_w, &vec[ty_param] tps) {
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ebml::start_tag(ebml_w, tag_items_data_item_ty_param_count);
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ebml::write_vint(ebml_w.writer, vec::len[ty_param](tps));
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ebml::end_tag(ebml_w);
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}
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fn encode_variant_id(&ebml::writer ebml_w, &def_id vid) {
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ebml::start_tag(ebml_w, tag_items_data_item_variant);
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ebml_w.writer.write(str::bytes(def_to_str(vid)));
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ebml::end_tag(ebml_w);
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}
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fn encode_type(&@crate_ctxt cx, &ebml::writer ebml_w, &ty::t typ) {
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ebml::start_tag(ebml_w, tag_items_data_item_type);
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auto f = def_to_str;
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auto ty_str_ctxt =
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@rec(ds=f, tcx=cx.tcx, abbrevs=tyencode::ac_use_abbrevs(cx.type_abbrevs));
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tyencode::enc_ty(io::new_writer_(ebml_w.writer), ty_str_ctxt, typ);
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ebml::end_tag(ebml_w);
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}
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fn encode_symbol(&@crate_ctxt cx, &ebml::writer ebml_w,
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node_id id) {
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ebml::start_tag(ebml_w, tag_items_data_item_symbol);
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ebml_w.writer.write(str::bytes(cx.item_symbols.get(id)));
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ebml::end_tag(ebml_w);
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}
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fn encode_discriminant(&@crate_ctxt cx, &ebml::writer ebml_w,
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node_id id) {
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ebml::start_tag(ebml_w, tag_items_data_item_symbol);
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ebml_w.writer.write(str::bytes(cx.discrim_symbols.get(id)));
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ebml::end_tag(ebml_w);
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}
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fn encode_tag_id(&ebml::writer ebml_w, &def_id id) {
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ebml::start_tag(ebml_w, tag_items_data_item_tag_id);
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ebml_w.writer.write(str::bytes(def_to_str(id)));
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ebml::end_tag(ebml_w);
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}
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fn encode_tag_variant_info(&@crate_ctxt cx, &ebml::writer ebml_w,
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node_id id, &vec[variant] variants,
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&mutable vec[tup(int, uint)] index,
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&vec[ty_param] ty_params) {
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for (variant variant in variants) {
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index += [tup(variant.node.id, ebml_w.writer.tell())];
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ebml::start_tag(ebml_w, tag_items_data_item);
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encode_def_id(ebml_w, local_def(variant.node.id));
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encode_kind(ebml_w, 'v' as u8);
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encode_tag_id(ebml_w, local_def(id));
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encode_type(cx, ebml_w, node_id_type(cx, variant.node.id));
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if (vec::len[variant_arg](variant.node.args) > 0u) {
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encode_symbol(cx, ebml_w, variant.node.id);
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}
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encode_discriminant(cx, ebml_w, variant.node.id);
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encode_type_param_count(ebml_w, ty_params);
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ebml::end_tag(ebml_w);
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}
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}
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fn encode_info_for_item(@crate_ctxt cx, &ebml::writer ebml_w,
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@item item, &mutable vec[tup(int, uint)] index) {
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alt (item.node) {
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case (item_const(_, _)) {
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ebml::start_tag(ebml_w, tag_items_data_item);
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encode_def_id(ebml_w, local_def(item.id));
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encode_kind(ebml_w, 'c' as u8);
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encode_type(cx, ebml_w, node_id_type(cx, item.id));
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encode_symbol(cx, ebml_w, item.id);
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ebml::end_tag(ebml_w);
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}
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case (item_fn(?fd, ?tps)) {
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ebml::start_tag(ebml_w, tag_items_data_item);
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encode_def_id(ebml_w, local_def(item.id));
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encode_kind(ebml_w, alt (fd.decl.purity) {
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case (pure_fn) { 'p' }
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case (impure_fn) { 'f' } } as u8);
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encode_type_param_count(ebml_w, tps);
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encode_type(cx, ebml_w, node_id_type(cx, item.id));
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encode_symbol(cx, ebml_w, item.id);
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ebml::end_tag(ebml_w);
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}
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case (item_mod(_)) {
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ebml::start_tag(ebml_w, tag_items_data_item);
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encode_def_id(ebml_w, local_def(item.id));
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encode_kind(ebml_w, 'm' as u8);
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ebml::end_tag(ebml_w);
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}
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case (item_native_mod(_)) {
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ebml::start_tag(ebml_w, tag_items_data_item);
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encode_def_id(ebml_w, local_def(item.id));
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encode_kind(ebml_w, 'n' as u8);
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ebml::end_tag(ebml_w);
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}
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case (item_ty(_, ?tps)) {
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ebml::start_tag(ebml_w, tag_items_data_item);
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encode_def_id(ebml_w, local_def(item.id));
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encode_kind(ebml_w, 'y' as u8);
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encode_type_param_count(ebml_w, tps);
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encode_type(cx, ebml_w, node_id_type(cx, item.id));
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ebml::end_tag(ebml_w);
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}
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case (item_tag(?variants, ?tps)) {
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ebml::start_tag(ebml_w, tag_items_data_item);
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encode_def_id(ebml_w, local_def(item.id));
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encode_kind(ebml_w, 't' as u8);
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encode_type_param_count(ebml_w, tps);
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encode_type(cx, ebml_w, node_id_type(cx, item.id));
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for (variant v in variants) {
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encode_variant_id(ebml_w, local_def(v.node.id));
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}
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ebml::end_tag(ebml_w);
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encode_tag_variant_info(cx, ebml_w, item.id, variants, index,
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tps);
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}
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case (item_res(_, _, ?tps, ?ctor_id)) {
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auto fn_ty = node_id_type(cx, item.id);
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ebml::start_tag(ebml_w, tag_items_data_item);
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encode_def_id(ebml_w, local_def(item.id));
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encode_kind(ebml_w, 'y' as u8);
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encode_type_param_count(ebml_w, tps);
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encode_type(cx, ebml_w, ty::ty_fn_ret(cx.tcx, fn_ty));
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ebml::end_tag(ebml_w);
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index += [tup(ctor_id, ebml_w.writer.tell())];
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ebml::start_tag(ebml_w, tag_items_data_item);
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encode_def_id(ebml_w, local_def(ctor_id));
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encode_kind(ebml_w, 'f' as u8);
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encode_type_param_count(ebml_w, tps);
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encode_type(cx, ebml_w, fn_ty);
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encode_symbol(cx, ebml_w, ctor_id);
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ebml::end_tag(ebml_w);
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}
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case (item_obj(_, ?tps, ?ctor_id)) {
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auto fn_ty = node_id_type(cx, ctor_id);
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ebml::start_tag(ebml_w, tag_items_data_item);
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encode_def_id(ebml_w, local_def(item.id));
|
||
|
|
encode_kind(ebml_w, 'y' as u8);
|
||
|
|
encode_type_param_count(ebml_w, tps);
|
||
|
|
encode_type(cx, ebml_w, ty::ty_fn_ret(cx.tcx, fn_ty));
|
||
|
|
ebml::end_tag(ebml_w);
|
||
|
|
|
||
|
|
index += [tup(ctor_id, ebml_w.writer.tell())];
|
||
|
|
ebml::start_tag(ebml_w, tag_items_data_item);
|
||
|
|
encode_def_id(ebml_w, local_def(ctor_id));
|
||
|
|
encode_kind(ebml_w, 'f' as u8);
|
||
|
|
encode_type_param_count(ebml_w, tps);
|
||
|
|
encode_type(cx, ebml_w, fn_ty);
|
||
|
|
encode_symbol(cx, ebml_w, ctor_id);
|
||
|
|
ebml::end_tag(ebml_w);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
fn encode_info_for_native_item(&@crate_ctxt cx, &ebml::writer ebml_w,
|
||
|
|
&@native_item nitem) {
|
||
|
|
ebml::start_tag(ebml_w, tag_items_data_item);
|
||
|
|
alt (nitem.node) {
|
||
|
|
case (native_item_ty) {
|
||
|
|
encode_def_id(ebml_w, local_def(nitem.id));
|
||
|
|
encode_kind(ebml_w, 'T' as u8);
|
||
|
|
encode_type(cx, ebml_w, ty::mk_native(cx.tcx));
|
||
|
|
}
|
||
|
|
case (native_item_fn(_, _, ?tps)) {
|
||
|
|
encode_def_id(ebml_w, local_def(nitem.id));
|
||
|
|
encode_kind(ebml_w, 'F' as u8);
|
||
|
|
encode_type_param_count(ebml_w, tps);
|
||
|
|
encode_type(cx, ebml_w, node_id_type(cx, nitem.id));
|
||
|
|
encode_symbol(cx, ebml_w, nitem.id);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
ebml::end_tag(ebml_w);
|
||
|
|
}
|
||
|
|
|
||
|
|
fn encode_info_for_items(&@crate_ctxt cx, &ebml::writer ebml_w) ->
|
||
|
|
vec[tup(int, uint)] {
|
||
|
|
let vec[tup(int, uint)] index = [];
|
||
|
|
ebml::start_tag(ebml_w, tag_items_data);
|
||
|
|
for each (@tup(node_id, middle::ast_map::ast_node) kvp in cx.ast_map.items()) {
|
||
|
|
alt (kvp._1) {
|
||
|
|
case (middle::ast_map::node_item(?i)) {
|
||
|
|
index += [tup(kvp._0, ebml_w.writer.tell())];
|
||
|
|
encode_info_for_item(cx, ebml_w, i, index);
|
||
|
|
}
|
||
|
|
case (middle::ast_map::node_native_item(?i)) {
|
||
|
|
index += [tup(kvp._0, ebml_w.writer.tell())];
|
||
|
|
encode_info_for_native_item(cx, ebml_w, i);
|
||
|
|
}
|
||
|
|
case (_) {}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
ebml::end_tag(ebml_w);
|
||
|
|
ret index;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
// Path and definition ID indexing
|
||
|
|
|
||
|
|
// djb's cdb hashes.
|
||
|
|
fn hash_def_id(&int def_id) -> uint { ret 177573u ^ (def_id as uint); }
|
||
|
|
|
||
|
|
fn hash_path(&str s) -> uint {
|
||
|
|
auto h = 5381u;
|
||
|
|
for (u8 ch in str::bytes(s)) { h = (h << 5u) + h ^ (ch as uint); }
|
||
|
|
ret h;
|
||
|
|
}
|
||
|
|
|
||
|
|
fn create_index[T](&vec[tup(T, uint)] index, fn(&T) -> uint hash_fn) ->
|
||
|
|
vec[vec[tup(T, uint)]] {
|
||
|
|
let vec[mutable vec[tup(T, uint)]] buckets = vec::empty_mut();
|
||
|
|
for each (uint i in uint::range(0u, 256u)) { buckets += [mutable []]; }
|
||
|
|
for (tup(T, uint) elt in index) {
|
||
|
|
auto h = hash_fn(elt._0);
|
||
|
|
buckets.(h % 256u) += [elt];
|
||
|
|
}
|
||
|
|
ret vec::freeze(buckets);
|
||
|
|
}
|
||
|
|
|
||
|
|
fn encode_index[T](&ebml::writer ebml_w, &vec[vec[tup(T, uint)]] buckets,
|
||
|
|
fn(&io::writer, &T) write_fn) {
|
||
|
|
auto writer = io::new_writer_(ebml_w.writer);
|
||
|
|
ebml::start_tag(ebml_w, tag_index);
|
||
|
|
let vec[uint] bucket_locs = [];
|
||
|
|
ebml::start_tag(ebml_w, tag_index_buckets);
|
||
|
|
for (vec[tup(T, uint)] bucket in buckets) {
|
||
|
|
bucket_locs += [ebml_w.writer.tell()];
|
||
|
|
ebml::start_tag(ebml_w, tag_index_buckets_bucket);
|
||
|
|
for (tup(T, uint) elt in bucket) {
|
||
|
|
ebml::start_tag(ebml_w, tag_index_buckets_bucket_elt);
|
||
|
|
writer.write_be_uint(elt._1, 4u);
|
||
|
|
write_fn(writer, elt._0);
|
||
|
|
ebml::end_tag(ebml_w);
|
||
|
|
}
|
||
|
|
ebml::end_tag(ebml_w);
|
||
|
|
}
|
||
|
|
ebml::end_tag(ebml_w);
|
||
|
|
ebml::start_tag(ebml_w, tag_index_table);
|
||
|
|
for (uint pos in bucket_locs) { writer.write_be_uint(pos, 4u); }
|
||
|
|
ebml::end_tag(ebml_w);
|
||
|
|
ebml::end_tag(ebml_w);
|
||
|
|
}
|
||
|
|
|
||
|
|
fn write_str(&io::writer writer, &str s) { writer.write_str(s); }
|
||
|
|
|
||
|
|
fn write_int(&io::writer writer, &int n) {
|
||
|
|
writer.write_be_uint(n as uint, 4u);
|
||
|
|
}
|
||
|
|
|
||
|
|
fn encode_meta_items(&ebml::writer ebml_w, &crate crate) {
|
||
|
|
fn encode_meta_item(&ebml::writer ebml_w, &meta_item mi) {
|
||
|
|
// FIXME (#487): Support all forms of meta item
|
||
|
|
ebml::start_tag(ebml_w, tag_meta_item);
|
||
|
|
alt (mi.node) {
|
||
|
|
case (meta_key_value(?key, ?value)) {
|
||
|
|
ebml::start_tag(ebml_w, tag_meta_item_key);
|
||
|
|
ebml_w.writer.write(str::bytes(key));
|
||
|
|
ebml::end_tag(ebml_w);
|
||
|
|
ebml::start_tag(ebml_w, tag_meta_item_value);
|
||
|
|
ebml_w.writer.write(str::bytes(value));
|
||
|
|
ebml::end_tag(ebml_w);
|
||
|
|
}
|
||
|
|
case (_) {
|
||
|
|
log_err "unimplemented meta_item type";
|
||
|
|
}
|
||
|
|
}
|
||
|
|
ebml::end_tag(ebml_w);
|
||
|
|
}
|
||
|
|
ebml::start_tag(ebml_w, tag_meta_export);
|
||
|
|
for each (@meta_item mi in crate_export_metas(crate)) {
|
||
|
|
encode_meta_item(ebml_w, *mi);
|
||
|
|
}
|
||
|
|
ebml::end_tag(ebml_w);
|
||
|
|
ebml::start_tag(ebml_w, tag_meta_local);
|
||
|
|
for each (@meta_item mi in crate_local_metas(crate)) {
|
||
|
|
encode_meta_item(ebml_w, *mi);
|
||
|
|
}
|
||
|
|
ebml::end_tag(ebml_w);
|
||
|
|
}
|
||
|
|
|
||
|
|
fn encode_metadata(&@crate_ctxt cx, &@crate crate) -> str {
|
||
|
|
auto string_w = io::string_writer();
|
||
|
|
auto buf_w = string_w.get_writer().get_buf_writer();
|
||
|
|
auto ebml_w = ebml::create_writer(buf_w);
|
||
|
|
// Encode the meta items
|
||
|
|
|
||
|
|
encode_meta_items(ebml_w, *crate);
|
||
|
|
// Encode and index the paths.
|
||
|
|
|
||
|
|
ebml::start_tag(ebml_w, tag_paths);
|
||
|
|
auto paths_index = encode_item_paths(ebml_w, crate);
|
||
|
|
auto str_writer = write_str;
|
||
|
|
auto path_hasher = hash_path;
|
||
|
|
auto paths_buckets = create_index[str](paths_index, path_hasher);
|
||
|
|
encode_index[str](ebml_w, paths_buckets, str_writer);
|
||
|
|
ebml::end_tag(ebml_w);
|
||
|
|
// Encode and index the items.
|
||
|
|
|
||
|
|
ebml::start_tag(ebml_w, tag_items);
|
||
|
|
auto items_index = encode_info_for_items(cx, ebml_w);
|
||
|
|
auto int_writer = write_int;
|
||
|
|
auto item_hasher = hash_def_id;
|
||
|
|
auto items_buckets = create_index[int](items_index, item_hasher);
|
||
|
|
encode_index[int](ebml_w, items_buckets, int_writer);
|
||
|
|
ebml::end_tag(ebml_w);
|
||
|
|
// Pad this, since something (LLVM, presumably) is cutting off the
|
||
|
|
// remaining % 4 bytes.
|
||
|
|
|
||
|
|
buf_w.write([0u8, 0u8, 0u8, 0u8]);
|
||
|
|
ret string_w.get_str();
|
||
|
|
}
|