path: root/VP-roomwork.lua

function patch_logic(logic, windows, activate_debug)
    local ptr_start = 3
    local rd_opcode = function(PC)
        logic:seek(PC * 4)
        return logic:readU32()
    end
    local patch_opcode = function(PC, newcode)
        logic:wseek(PC * 4)
        logic:writeU32(newcode)
    end
    local txt_process = function(PC)
        local opcode = rd_opcode(PC)
        local txtptr
        local x, y, width, height
        if andB(opcode, 0x00100000) ~= 0 then
            local psh1 = rd_opcode(PC - 1)
            local psh2 = rd_opcode(PC - 2)
            local psh3 = rd_opcode(PC - 3)
            local psh4 = rd_opcode(PC - 4)
            local psh5 = rd_opcode(PC - 5)
            local psh6 = rd_opcode(PC - 6)
        
            if andB(psh1, 0xff000000) ~= 0x12000000 then return end
            if andB(psh2, 0xff000000) ~= 0x12000000 then return end
            if andB(psh3, 0xff000000) ~= 0x12000000 then return end
            if andB(psh4, 0xff000000) ~= 0x12000000 then return end
            if andB(psh5, 0xff000000) ~= 0x12000000 then return end
            if andB(psh6, 0xff000000) ~= 0x12000000 then return end
        
            local arg1 = andB(psh1, 0x7fffff)
            local arg2 = andB(psh2, 0x7fffff)
            local arg3 = andB(psh3, 0x7fffff)
            local arg4 = andB(psh4, 0x7fffff)
            local arg5 = andB(psh5, 0x7fffff)
            local arg6 = andB(psh6, 0x7fffff)
        
            txtptr = arg6 + 1 - ptr_start
            
            if txtptr < 0 then return end
            
            local window = windows[txtptr + ptr_start]
            
            if not window then return end
            
            if window.x and window.x ~= "var" then psh5 = orB(andB(psh5, 0xff800000), window.x) end
            if window.y and window.y ~= "var" then psh4 = orB(andB(psh4, 0xff800000), window.y) end
            if window.width and window.width ~= "var" then psh3 = orB(andB(psh3, 0xff800000), window.width) end
            if window.height and window.height ~= "var" then psh2 = orB(andB(psh2, 0xff800000), window.height) end
            
            patch_opcode(PC - 2, psh2)
            patch_opcode(PC - 3, psh3)
            patch_opcode(PC - 4, psh4)
            patch_opcode(PC - 5, psh5)
        else
            txtptr = andB(opcode, 0xff) + 1 - ptr_start
            if txtptr < 0 then return end
            local window = windows[txtptr + ptr_start]
            if not window then return end
            if window.wtype == "fixed" then return end
            if window.x == "var" or window.y == "var" or window.width == "var" or window.height == "var" then return end
            local arg1 = orB(window.x, shl(window.y, 16))
            local arg2 = orB(window.width, shl(window.height, 16))
            patch_opcode(PC + 1, arg1)
            patch_opcode(PC + 2, arg2)
        end
    end
    local process_subtxt = function(PC)
        local psh1 = rd_opcode(PC - 1)
        local psh2 = rd_opcode(PC - 2)
        local psh3 = rd_opcode(PC - 3)
        local psh4 = rd_opcode(PC - 4)
        local psh5 = rd_opcode(PC - 5)
        local psh6 = rd_opcode(PC - 6)
        
        if andB(psh1, 0xff000000) ~= 0x12000000 and andB(psh1, 0xff000000) ~= 0x0B000000 then return end
        if andB(psh2, 0xff000000) ~= 0x12000000 then return end
        if andB(psh3, 0xff000000) ~= 0x12000000 and andB(psh3, 0xff000000) ~= 0x0B000000 then return end
        if andB(psh4, 0xff000000) ~= 0x12000000 and andB(psh4, 0xff000000) ~= 0x0B000000 then return end
        if andB(psh5, 0xff000000) ~= 0x12000000 and andB(psh5, 0xff000000) ~= 0x0B000000 then return end
        if andB(psh6, 0xff000000) ~= 0x12000000 and andB(psh6, 0xff000000) ~= 0x0B000000 then return end
        
        local arg2 = andB(psh2, 0x7fffff)
        
        local txtptr = arg2 + 1 - ptr_start
        if txtptr < 0 then return end
        
        local window = windows[txtptr + ptr_start]
        if not window then return end

        if andB(psh3, 0xff000000) ~= 0x0B000000 and window.height and window.height ~= "var" then psh3 = orB(andB(psh3, 0xff800000), window.height) end
        if andB(psh4, 0xff000000) ~= 0x0B000000 and window.width and window.width ~= "var" then psh4 = orB(andB(psh4, 0xff800000), window.width) end
        if andB(psh5, 0xff000000) ~= 0x0B000000 and window.y and window.y ~= "var" then psh5 = orB(andB(psh5, 0xff800000), window.y) end
        if andB(psh6, 0xff000000) ~= 0x0B000000 and window.x and window.x ~= "var" then psh6 = orB(andB(psh6, 0xff800000), window.x) end
        
        patch_opcode(PC - 3, psh3)
        patch_opcode(PC - 4, psh4)
        patch_opcode(PC - 5, psh5)
        patch_opcode(PC - 6, psh6)
    end
    local call_process = function(PC)
        local opcode = rd_opcode(PC)
        if opcode == 0x1400033C or opcode == 0x140003E2 or opcode == 0x140003F5 or opcode == 0x14000408 then process_subtxt(PC) end
    end
    check_room_logic(logic)
    if activate_debug then patch_opcode(0x1158, 0x9e000000) end
    logic_disasm(logic, nil, {
        -- txtbox1
        [0x92] = txt_process,
        -- txtbox2
        [0x93] = txt_process,
        -- txtbox3
        [0x94] = txt_process,
        -- txtbox4
        [0x98] = txt_process,
        -- *sigh*
        [0x14] = call_process,
    } )
end

function process_current_room_script()
    local script, font, scriptfile, fontfile, nptrs, windows
    room_idx = current_file - 3610
    if not rooms_lookup[room_idx] then return nil, nil end
    
    script = Buffer(true)
    scriptfile = Buffer(true)
    fontfile = Buffer(true)
    font = { idx = 1, ilookup = {}, clookup = {} }
    for k, v in ipairs(script_types.room.translated) do
        add_glyph(font, v)
    end
    for i = 1, script_types.room.size do
        script:writeU8(script_types.room.header[i])
    end
    scriptfile:writeU16(0)
    scriptfile:writeU16(3)
    nptrs = 0
    windows = {}
    for pidx, pval in ipairs(rooms_lookup[room_idx]) do
        nptrs = nptrs + 1
        local ptr = rooms_txts[pval]
        windows[nptrs] = windows_data[pval]
        scriptfile:writeU16(script:getsize())
        for k, v in ipairs(ptr) do
            if type(v) == "string" then
                local str = v
                local char
                local gidx
                while str:len() ~= 0 do
                    char, str = get_next_utf8(str)
                    gidx = font.clookup[char] or add_glyph(font, char)
                    if gidx < 0x80 then
                        script:writeU8(gidx)
                    else
                        local high = shl(gidx, 7)
                        local low = andB(gidx, 127) + 0x80
                        script:writeU8(low)
                        script:writeU8(high)
                    end
                end
            elseif type(v) == "table" then
                local code = v[1]
                local high = 0x80
                local low = 0x80 + code
                script:writeU8(low)
                script:writeU8(high)
                if v[2] then script:writeU8(v[2]) end
                if v[3] then script:writeU8(v[3]) end
                if v[4] then error "Wrong script..." end
            else
                error("Wrong script...")
            end
        end
        script:writeU8(0)
    end
    scriptfile:copyfrom(script)
    script:destroy()

    local npadding = alignment(#font.ilookup, 4)
    
    fontfile:writeU32(#font.ilookup + npadding)
    fontfile:writeU32(12)
    
    for _, glyph in ipairs(font.ilookup) do
        if not glyphes[glyph] then error("No glyph in database for " .. glyph) end
        fontfile:writeU8(glyphes[glyph].attr.Width)
    end
    for i = 1, npadding do
        fontfile:writeU8(0)
    end
    
    for _, glyph in ipairs(font.ilookup) do
        Base64DecodeBin(glyphes[glyph].attr.Data, fontfile)
    end
    for i = 1, npadding do
        for j = 1, 6 do fontfile:writeU32(0) end
    end
    
    return scriptfile, fontfile, nptrs + 2, windows
end

function insert_script(old, new, nptrs, windows)
    local size_logic = old:readU32()
    local u1 = old:readU32()
    local u2 = old:readU32()
    local n_ptrs = old:readU32()
    local u3 = old:readU32()
    local u4 = old:readU32()
    local u5 = old:readU32()
    
    local ret = Buffer(true)
    
    ret:writeU32(size_logic)
    ret:writeU32(u1)
    ret:writeU32(u2)
    if nptrs ~= n_ptrs then error("Script inconsistancy! Got " .. nptrs .. " instead of " .. n_ptrs) end
    ret:writeU32(nptrs)
    ret:writeU32(u3)
    ret:writeU32(u4)
    ret:writeU32(u5)
    local logic = Buffer(true)
    logic:copyfrom(old, size_logic)
    patch_logic(logic, windows, got_us and current_file == (3610 + 125) and activate_debug_room)
    logic:seek(0)
    ret:copyfrom(logic)
    ret:copyfrom(new)
    
    return ret
end

function process_arcroom(fname, h, size, ext)
    log("Processing " .. fname .. "." .. ext)
    local o
    
    if dump_mode then
        o = Output(fname .. "." .. ext)
        o:copyfrom(h, size)
        o:destroy()
        h:seek(-size, SEEK_CUR)
    end
    log("Processing " .. fname .. " - format 'arcroom' - " .. ext)
    dump_mkdir(fname)
    
    local nfiles = h:readU32()
    local offset = h:readU32()
    
    if nfiles * 8 + 8 ~= offset then
        error("Bad archive format.")
    end
    
    local ret
    
    if not dump_mode then
        ret = Buffer(true)
        ret:writeU32(nfiles)
        ret:writeU32(offset)
    end
    
    index = {}
    for i = 1, nfiles do
        index[i] = {}
        index[i].ftype = h:readU32()
        index[i].size = h:readU32()
    end
    
    local tell
    local outfile = {}
    local script = nil
    local font = nil
    local nptrs
    local windows = {}
    if not dump_mode then
        script, font, nptrs, windows = process_current_room_script()
    end
    for i = 1, nfiles do
        tell = h:tell()
        local handler = nil
        local counter = 1
        if dump_mode and ext == "arm" and index[i].ftype == 4 then
            log("Preparing to dump script...")
            handler = function(fname, h, size, ext)
                if counter == 1 then
                    log("Taking script...")
                    script = Buffer(true)
                    script:copyfrom(h)
                elseif counter == 2 then
                    log("Taking font...")
                    font = Buffer(true)
                    font:copyfrom(h)
                else
                    error("Too many files.")
                end
                counter = counter + 1
            end
        elseif not dump_mode and ext == "arm" and index[i].ftype == 4 and script and font then
            old_script = Buffer(true)
            handler = function(fname, h, size, ext)
                local ret
                if counter == 1 then
                    log("Putting script...")
                    ret = insert_script(h, script, nptrs, windows)
                elseif counter == 2 then
                    log("Putting font...")
                    ret = Buffer(true)
                    ret:copyfrom(font)
                else
                    error("Too many files.")
                end
                counter = counter + 1
                return ret
            end
        elseif dump_mode and ext == "sarc" and index[i].ftype == 4 then
            handler = function(fname, h, size, ext)
                if counter == 1 then
                    if script then error "Can't have two scripts in these..." end
                    log("Taking text...")
                    script = Buffer(true)
                    script:copyfrom(h)
                elseif counter == 2 then
                    if font then error "Can't have two fonts in these..." end
                    log("Taking font...")
                    font = Buffer(true)
                    font:copyfrom(h)
                else
                    error("Too many files")
                end
                counter = counter + 1
            end
        elseif dump_mode and ext == "sarc" and index[i].ftype == 7 then
            if font then error "Can't have two fonts in these..." end
            handler = function(fname, h, size, ext)
                if counter == 1 then
                    log("Taking font...")
                    font = Buffer(true)
                    font:copyfrom(h)
                else
                    error("Too many files")
                end
                counter = counter + 1
            end
        elseif not dump_mode and ext == "sarc" and index[i].ftype == 4 then
--            error "Not written yet"
            handler = nil
        elseif not dump_mode and ext == "sarc" and index[i].ftype == 7 then
--            error "Not written yet"
            handler = nil
        end
        outfile[i] = process_single_file(fname .. string.format("/%04i-%08X", i, index[i].ftype), h, index[i].size, "room", handler)
        if handler and script and font then
            if dump_mode and ext == "arm" then
                extract_room_script(fname .. string.format("/%04i", i), script, font)
            elseif dump_mode then
                extract_simple_script(fname .. string.format("/%04i", i), script, font)
            end
            script:destroy()
            font:destroy()
            script = nil
            font = nil
        end
        h:seek(tell + index[i].size)
    end

    if not dump_mode then
        for i = 1, nfiles do
            local alignment_bytes = alignment(outfile[i]:getsize(), 4)
            for j = 1, alignment_bytes do
                outfile[i]:writeU8(0)
            end
            ret:writeU32(index[i].ftype)
            ret:writeU32(outfile[i]:getsize())
        end
        for i = 1, nfiles do
            ret:copyfrom(outfile[i])
            outfile[i]:destroy()
        end
    end
    
    return ret
end

room_logic_check = {
    [0x0090] = { 0x18000000, 0x00000008 }, [0x009B] = { 0x98100000, 0x17000000 },
    [0x033C] = { 0x18000000, 0x0000002C }, [0x03BC] = { 0x92100000, 0x150003E1 }, [0x03C7] = { 0x94100000, 0x150003E1 }, [0x03D3] = { 0x93100000, 0x150003E1 }, [0x03DF] = { 0x92100000, 0x150003E1 },
    [0x03E2] = { 0x18000000, 0x00000018 }, [0x03F0] = { 0x1400033C, 0x7E000000 },
    [0x03F5] = { 0x18000000, 0x00000018 }, [0x0403] = { 0x1400033C, 0x7E000000 },
    [0x0408] = { 0x18000000, 0x00000018 }, [0x0416] = { 0x1400033C, 0x7E000000 },
--    [0x041B] = { 0x18000000, 0x00000020 }, [0x042B] = { 0x1400033C, 0x7E000000 },
--    [0x0432] = { 0x18000000, 0x00000020 }, [0x0442] = { 0x1400033C, 0x7E000000 },
--    [0x0449] = { 0x18000000, 0x00000020 }, [0x0459] = { 0x1400033C, 0x7E000000 },
}

function check_opcode(script, PC, supposed)
    script:seek(PC * 4)
    local r = script:readU32()
    if r ~= supposed then error(string.format("Error for script: opcode %04X is %08X but was supposed to be %08X", PC, r, supposed)) end
end

function check_room_logic(script)
    for offset, v in pairs(room_logic_check) do
        local PC = offset - 1
        for suboffset, supposed in ipairs(v) do
            check_opcode(script, PC + suboffset, supposed)
        end
    end
end

function extract_room_script(fname, script, font)
    log("Processing script " .. fname)
    dump_mkdir(fname)
    dump_mkdir(fname .. "/EXTRA")
    local font = extract_font(fname .. "/FONT", font)
    local lookup = resolve_font(font)
    local size_1 = script:readU32()
    local logic_offset = script:readU32()
    local u1 = script:readU32()
    local n_ptrs = script:readU32()
    local u3 = script:readU32()
    local u4 = script:readU32()
    local u5 = script:readU32()
    
    if logic_offset ~= 0 then error("Unhandled logic offset " .. logic_offset) end
    
    local o
    o = Output(fname .. "/EXTRA/00-head1-" .. string.format("%08X", u1) .. ".bin")
    o:writeU32(u1)
    o:destroy()
    o = Output(fname .. "/EXTRA/00-head2-" .. string.format("%08X-%08X-%08X", u3, u4, u5) .. ".bin")
    o:writeU32(u3)
    o:writeU32(u4)
    o:writeU32(u5)
    o:destroy()
    o = Output(fname .. "/EXTRA/01-head1.bin")
    o:writeU32(u1)
    o:destroy()
    o = Output(fname .. "/EXTRA/01-head2.bin")
    o:writeU32(u3)
    o:writeU32(u4)
    o:writeU32(u5)
    o:destroy()
    o = Output(fname .. "/EXTRA/02-part1.bin")
    o:copyfrom(script, size_1)
    o:destroy()
    script:seek(-size_1, SEEK_CUR)
    local logic = Buffer(true)
    logic:copyfrom(script, size_1)
    
    local ptrs = {}
    local ptr_start = 1
    
    for i = 1, n_ptrs do
        ptrs[i] = script:readU16()
    end
    
    local ptrs_contents, ptrs_raws = {}, {}
    local tell = script:tell()
    ptrs_contents[1] = ""
    ptrs_contents[2] = ""
    ptrs_raws[1] = ""
    ptrs_raws[2] = ""
    ptr_start = 3
    
    local header = script_types.room.header
    for i = 1, script_types.room.size do
        if script:readU8() ~= header[i] then error("Script header file of type 'room' not according to its header") end
    end
    
    for i = ptr_start, n_ptrs do
        ptrs_contents[i] = ""
        ptrs_raws[i] = ""
        if tell + ptrs[i] ~= script:tell() then error("Script consistancy failure for pointer " .. i .. " - we're at " .. script:tell() .. " and " .. (tell + ptrs[i]) .. " was expected.") end
        while true do
            local r, rr = extract_char(script, lookup)
            if not r then break end
            ptrs_contents[i] = ptrs_contents[i] .. r
            ptrs_raws[i] = ptrs_raws[i] .. rr
        end
    end
    
    o = Output(fname .. "/EXTRA/logic.txt")
    check_room_logic(logic)
    local textboxes = { }
    local rd_opcode = function(PC)
        logic:seek(PC * 4)
        return logic:readU32()
    end
    local add_textbox = function(txtptr, txtbox)
        if txtptr < 0 then return end
        o:write("\n")
        if ptrs_raws[txtptr + ptr_start] then
            o:write(ptrs_raws[txtptr + ptr_start])
            if textboxes[txtptr + ptr_start] then
                o:write("\n****SUSPECT****PTR ALREADY RECORDED****: " .. (txtptr + ptr_start))
            end
            textboxes[txtptr + ptr_start] = txtbox
        else
            error("****SUSPECT****PTR TOO LARGE****: " .. (txtptr + ptr_start))
        end
    end
    local txt_process = function(PC)
        local opcode = rd_opcode(PC)
        local txtptr
        local x, y, width, height
        if andB(opcode, 0x00100000) ~= 0 then
            local psh1 = rd_opcode(PC - 1)
            local psh2 = rd_opcode(PC - 2)
            local psh3 = rd_opcode(PC - 3)
            local psh4 = rd_opcode(PC - 4)
            local psh5 = rd_opcode(PC - 5)
            local psh6 = rd_opcode(PC - 6)
        
            if andB(psh1, 0xff000000) ~= 0x12000000 then return end
            if andB(psh2, 0xff000000) ~= 0x12000000 then return end
            if andB(psh3, 0xff000000) ~= 0x12000000 then return end
            if andB(psh4, 0xff000000) ~= 0x12000000 then return end
            if andB(psh5, 0xff000000) ~= 0x12000000 then return end
            if andB(psh6, 0xff000000) ~= 0x12000000 then return end
        
            local arg1 = andB(psh1, 0x7fffff)
            local arg2 = andB(psh2, 0x7fffff)
            local arg3 = andB(psh3, 0x7fffff)
            local arg4 = andB(psh4, 0x7fffff)
            local arg5 = andB(psh5, 0x7fffff)
            local arg6 = andB(psh6, 0x7fffff)
        
            txtptr = arg6 + 1 - ptr_start

            x = arg5
            y = arg4
            width = arg3
            height = arg2
        else
            txtptr = andB(opcode, 0xff) + 1 - ptr_start
            local arg1 = rd_opcode(PC + 1)
            local arg2 = rd_opcode(PC + 2)
            x = andB(arg1, 0xffff)
            y = shr(arg1, 16)
            width = andB(arg2, 0xffff)
            height = shr(arg2, 16)
        end
        add_textbox(txtptr, {
            x = x,
            y = y,
            width = width,
            height = height,
        })
    end
    local process_subtxt = function(PC)
        local psh1 = rd_opcode(PC - 1)
        local psh2 = rd_opcode(PC - 2)
        local psh3 = rd_opcode(PC - 3)
        local psh4 = rd_opcode(PC - 4)
        local psh5 = rd_opcode(PC - 5)
        local psh6 = rd_opcode(PC - 6)
        
        if andB(psh1, 0xff000000) ~= 0x12000000 and andB(psh1, 0xff000000) ~= 0x0B000000 then return end
        if andB(psh2, 0xff000000) ~= 0x12000000 then return end
        if andB(psh3, 0xff000000) ~= 0x12000000 and andB(psh3, 0xff000000) ~= 0x0B000000 then return end
        if andB(psh4, 0xff000000) ~= 0x12000000 and andB(psh4, 0xff000000) ~= 0x0B000000 then return end
        if andB(psh5, 0xff000000) ~= 0x12000000 and andB(psh5, 0xff000000) ~= 0x0B000000 then return end
        if andB(psh6, 0xff000000) ~= 0x12000000 and andB(psh6, 0xff000000) ~= 0x0B000000 then return end
        
        local arg1 = andB(psh1, 0x7fffff)
        local arg2 = andB(psh2, 0x7fffff)
        local arg3 = andB(psh3, 0x7fffff)
        local arg4 = andB(psh4, 0x7fffff)
        local arg5 = andB(psh5, 0x7fffff)
        local arg6 = andB(psh6, 0x7fffff)
        
        if andB(psh1, 0xff000000) == 0x0B000000 then arg1 = nil end
        if andB(psh3, 0xff000000) == 0x0B000000 then arg3 = nil end
        if andB(psh4, 0xff000000) == 0x0B000000 then arg4 = nil end
        if andB(psh5, 0xff000000) == 0x0B000000 then arg5 = nil end
        if andB(psh6, 0xff000000) == 0x0B000000 then arg6 = nil end
        
        local txtptr = arg2 + 1 - ptr_start
        add_textbox(txtptr, {
            x = arg6 or "var",
            y = arg5 or "var",
            width = arg4 or "var",
            height = arg3 or "var",
        })
    end
    local process_subtxt2 = function(PC)
        local psh1 = rd_opcode(PC - 1)
        local psh2 = rd_opcode(PC - 2)
        local psh3 = rd_opcode(PC - 3)
        local psh4 = rd_opcode(PC - 4)
        local psh5 = rd_opcode(PC - 5)

        if andB(psh1, 0xff000000) ~= 0x12000000 then return end
        if andB(psh2, 0xff000000) ~= 0x0B000000 then return end
        if andB(psh3, 0xff000000) ~= 0x22000000 then return end
        if andB(psh4, 0xff000000) ~= 0x0B000000 then return end
        if andB(psh5, 0xff000000) ~= 0xCB000000 then return end
        
        local txtptr = andB(psh5, 0xff) + 1 - ptr_start
        add_textbox(txtptr, {
            typ = "fixed",
        })
    end
    local call_process = function(PC)
        local opcode = rd_opcode(PC)
        if opcode == 0x1400033C or opcode == 0x140003E2 or opcode == 0x140003F5 or opcode == 0x14000408 then process_subtxt(PC) end
        if opcode == 0x14000090 then process_subtxt2(PC) end
    end
    logic_disasm(logic, o, {
        -- ret
        [0x17] = function(PC) o:write("\n-----------------------------------------------------\n") end,
        -- txtbox1
        [0x92] = txt_process,
        -- txtbox2
        [0x93] = txt_process,
        -- txtbox3
        [0x94] = txt_process,
        -- txtbox4
        [0x98] = txt_process,
        -- *sigh*
        [0x14] = call_process,
    } )
    
    o:destroy()
    logic:destroy()
    
    for i = ptr_start, n_ptrs do
        if textboxes[i] then
            local tb = textboxes[i]
            if tb.typ == "fixed" then
                ptrs_contents[i] = '<window type="fixed"/>\n' .. ptrs_contents[i]
            elseif tb.typ == "auto" then
                ptrs_contents[i] = '<window type="auto"/>\n' .. ptrs_contents[i]
            else
                ptrs_contents[i] = '<window x="' .. tb.x .. '" y="' .. tb.y .. '" width="' .. tb.width .. '" height="' .. tb.height .. '"/>\n' .. ptrs_contents[i]
            end
        else
            ptrs_contents[i] = '<nowindowdetected/>\n' .. ptrs_contents[i]
        end
    end
    
    -- WARNING -- only for rooms
    local ptrs_idx = process_ptrs(ptrs_contents, ptr_start, n_ptrs)
    
    local o = Output(fname .. "-script.txt")
    o:write("template:room\n")
    
    for i = ptr_start, n_ptrs do
        o:write(ptrs_idx[i] .. "\n")
    end
    
    lookup_rooms:write("    [" .. current_file - 3610 .. "] = { ")
    for i = ptr_start, n_ptrs do
        lookup_rooms:write(ptrs_idx[i] .. ", ")
    end
    lookup_rooms:write "},\n"

    o:destroy()
end

function extract_simple_script(fname, script, font)
    log("Processing script " .. fname)
    dump_mkdir(fname)
    local font = extract_font(fname .. "/FONT", font)
    local lookup = resolve_font(font)
    local n_ptrs = 1
    local script_begin = script:readU32()
    
    local ptrs = {}
    local unks = {}
    local ptr_start = 1
    local tell = script:tell()
    
    while tell < script_begin do
        unks[n_ptrs] = script:readU32()
        ptrs[n_ptrs] = script:readU32()
        tell = script:tell()
        n_ptrs = n_ptrs + 1
    end
    ptrs[n_ptrs] = script:getsize() - script_begin
    n_ptrs = n_ptrs - 1
    
    local ptrs_contents, ptrs_raws = {}, {}
    ptr_start = 1
    for i = ptr_start, n_ptrs do
        ptrs_contents[i] = ""
        ptrs_raws[i] = ""

--        if tell + ptrs[i] ~= script:tell() then print("Script consistancy failure for pointer " .. i .. " - we're at " .. script:tell() .. " and " .. (tell + ptrs[i]) .. " was expected.") end

        script:seek(script_begin + ptrs[i])
        while script:tell() ~= (script_begin + ptrs[i + 1]) do
            local r, rr = extract_char(script, lookup)
            if r then
                ptrs_contents[i] = ptrs_contents[i] .. r
                ptrs_raws[i] = ptrs_raws[i] .. rr
            elseif script:tell() ~= (script_begin + ptrs[i + 1]) then
                ptrs_contents[i] = ptrs_contents[i] .. "<ZERO>"
            end
        end
    end
    
    local o = Output(fname .. "-script.txt")
    for i = ptr_start, n_ptrs do
        o:write("<ptr " .. i .. " - " .. unks[i] .. ">\n")
        o:write(ptrs_contents[i])
        o:write("\n")
    end
    
    o:destroy()
end