--!A cross-platform build utility based on Lua
--
-- Licensed under the Apache License, Version 2.0 (the "License");
-- you may not use this file except in compliance with the License.
-- You may obtain a copy of the License at
--
--     http://www.apache.org/licenses/LICENSE-2.0
--
-- Unless required by applicable law or agreed to in writing, software
-- distributed under the License is distributed on an "AS IS" BASIS,
-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-- See the License for the specific language governing permissions and
-- limitations under the License.
--
-- Copyright (C) 2015-present, Xmake Open Source Community.
--
-- @author      ruki
-- @file        readsyms.lua
--

-- imports
import("core.base.binutils")

-- get symbols from binary file (auto-detect format: ELF, COFF, Mach-O)
--
-- @param binaryfile  the binary file path (required)
-- @return            the symbols table
function _get_symbols(binaryfile)
    assert(binaryfile, "usage: xmake l utils.binary.readsyms <binaryfile>")

    binaryfile = path.absolute(binaryfile)
    assert(os.isfile(binaryfile), "%s not found!", binaryfile)

    return binutils.readsyms(binaryfile)
end

-- dump symbols to console
--
-- @param binaryfile  the object file path (required)
function dump(binaryfile)
    local objects = _get_symbols(binaryfile)
    if objects and #objects > 0 then
        for _, obj in ipairs(objects) do
            local symbols = obj.symbols
            if symbols and #symbols > 0 then
                -- print object file
                print("")
                cprint("${bright}Object: %s", obj.objectfile)
                print(string.rep("-", 80))

                -- calculate column widths for alignment
                local max_name_len = 0
                local max_type_len = 0

                for i, sym in ipairs(symbols) do
                    if sym.name then
                        max_name_len = math.max(max_name_len, #sym.name)
                    end
                    if sym.type then
                        max_type_len = math.max(max_type_len, #sym.type)
                    end
                end

                -- calculate column widths
                local type_width = math.max(max_type_len, 4)
                local name_width = math.max(max_name_len, 4)

                -- print header
                local header_format = "  %-" .. type_width .. "s  %s"
                print(string.format(header_format, "TYPE", "NAME"))

                -- print symbols
                local format_str = "  %-" .. type_width .. "s  %s"

                for i, sym in ipairs(symbols) do
                    local type_str = sym.type or "unknown"
                    local name_str = sym.name or ""

                    print(string.format(format_str, type_str, name_str))
                end
                print("")
                cprint("${bright}%d symbols found!", #symbols)
            end
        end
    else
        print("")
        cprint("${bright}No symbols found!")
    end
end

-- read symbols from object file (auto-detect format: ELF, COFF, Mach-O)
--
-- @param binaryfile  the object file path (required)
-- @return            the symbols table
function main(binaryfile)
    assert(binaryfile, "usage: xmake l utils.binary.readsyms <binaryfile>")
    return _get_symbols(binaryfile)
end