translate

pub fn translate(options: Options) mem.Allocator.Error![]u8

File

Code

pub fn translate(options: Options) mem.Allocator.Error![]u8 {
    const gpa = options.gpa;
    var arena_allocator = std.heap.ArenaAllocator.init(gpa);
    defer arena_allocator.deinit();
    const arena = arena_allocator.allocator();

    var translator: Translator = .{
        .gpa = gpa,
        .arena = arena,
        .alias_list = .empty,
        .global_scope = try arena.create(Scope.Root),
        .comp = options.comp,
        .pp = options.pp,
        .tree = options.tree,
        .pub_static = options.pub_static,
        .func_bodies = options.func_bodies,
        .keep_macro_literals = options.keep_macro_literals,
        .default_init = options.default_init,
        .strict_flex_arrays = options.strict_flex_arrays,
    };
    translator.global_scope.* = Scope.Root.init(&translator);
    defer {
        translator.type_decls.deinit(gpa);
        translator.alias_list.deinit(gpa);
        translator.global_names.deinit(gpa);
        translator.weak_global_names.deinit(gpa);
        translator.opaque_demotes.deinit(gpa);
        translator.unnamed_typedefs.deinit(gpa);
        translator.anonymous_record_field_names.deinit(gpa);
        translator.typedefs.deinit(gpa);
        translator.global_scope.deinit();
        translator.wip_var_inits.deinit(gpa);
    }

    try translator.prepopulateGlobalNameTable();
    try translator.transTopLevelDecls();

    // Insert empty line before macros.
    try translator.global_scope.nodes.append(gpa, try ZigTag.warning.create(arena, "\n"));

    try translator.transMacros();

    for (translator.alias_list.items) |alias| {
        if (!translator.global_scope.sym_table.contains(alias.alias)) {
            const node = try ZigTag.alias.create(arena, .{ .actual = alias.alias, .mangled = alias.name });
            try translator.addTopLevelDecl(alias.alias, node);
        }
    }

    try translator.global_scope.processContainerMemberFns();

    var allocating: std.Io.Writer.Allocating = .init(gpa);
    defer allocating.deinit();

    allocating.writer.writeAll(
        \\const __root = @This();
        \\pub const __builtin = @import("std").zig.c_translation.builtins;
        \\pub const __helpers = @import("std").zig.c_translation.helpers;
        \\
    ) catch return error.OutOfMemory;

    var zig_ast = try ast.render(gpa, translator.global_scope.nodes.items);
    defer {
        gpa.free(zig_ast.source);
        zig_ast.deinit(gpa);
    }
    zig_ast.render(gpa, &allocating.writer, .{}) catch return error.OutOfMemory;
    return allocating.toOwnedSlice();
}