Hi, I just started MASM and I need some help. I just created a SDL lib file and whenever I try to use SDL functions using call, MASM tells me that the SDL functions are undefined symbols. I read somewhere that I don't need a inc file unless I use invoke. What am I doing wrong?
ALL used functions must have a declaration prototype.
The prototype can be C , BASIC, FORTRAN, PASCAL, SYSCALL, STDCALL.
and so on with number and type of arguments.
Before the call , masm must know all this details to write it.
Hi Gadersd,
Welcome on board. You can write code the way you suggest but you are doing it the hard way and with a highly reduced chance of success if you try and avoid prototypes. In MASM code you can have local procedures, library procedures or import libraries and they generally use an identical type of prototype for all of them.
A prototype does something very basic in MASM, it tells the assembler BEFOREHAND what the argument count and sizes are and this allows MASM to use the INVOKE notation with some limited but useful checking so that you don't make a mess of a procedure call. Windows has something like 12000 API functions, most of which are prototyped for you in the include files where if you try and do it the hard way you have to manually call each procedure or API.
Do you know of a program that can convert SDL.def to SDL.inc so that I don't have to do it manually.
You can use Japheth's h2incX (http://www.japheth.de/h2incX.html) for conversion of the headers (sometimes it is required to correct the translation at some points, which is maybe hard for people who are new to MASM).
For SDL 1.2, there is already a translation: see the WinInc (http://www.japheth.de/WinInc.html) site.
What do the langtypes mean in masm? How do I choose which one to use in proto?
for most stuff we do in here, we use StdCall, which is the default
MyFunc PROTO :HWND,:LPSTR,:DWORD
Quote from: Gadersd on August 06, 2013, 12:03:57 AM
Do you know of a program that can convert SDL.def to SDL.inc so that I don't have to do it manually.
def2inc can convert module definition files to include files.