Re: [Gm2] Interfacing to C -- How do we map size_t to Modula-2?

[Benjamin Kowarsch]

On Jul 22, 2017, at 08:05, Gaius Mulley wrote:

I've added CSIZE_T, CSSIZE_T data types to SYSTEM.def which map onto
size_t and ssize_t in C.

Thanks, that is very useful.

I updated the GM2 POSIX interfaces of M2PP accordingly. I post the links below, in case somebody else wants to reuse them

https://github.com/m2sf/m2pp/blob/master/src/posix/stdio.gm2.iso.def

https://github.com/m2sf/m2pp/blob/master/src/posix/stdio.gm2.pim.def

https://github.com/m2sf/m2pp/blob/master/src/posix/unistd.gm2.def

stdio still needs two separate versions for PIM and ISO because of LOC vs BYTE but these will eventually be generated from a common template using M2PP itself.

Also of interest beyond this project may be the two libraries BasicFileIO and BasicFileSys for which there are implementations based on PIM, ISO, POSIX and vendor specific libraries, making them portable across PIM3, PIM4, ISO dialects on at least 13 compilers, with Aglet and Clarion still on the to do list.

https://github.com/m2sf/m2pp/blob/master/src/BasicFileIO.def

https://github.com/m2sf/m2pp/blob/master/src/BasicFileSys.cardinal.def

https://github.com/m2sf/m2pp/blob/master/src/BasicFileSys.longint.def

the latter has two versions, one defining type FileSize as CARDINAL the other as LONGINT.

The build configuration script determines which files are needed and places renamed copies in the build directory accordingly.

https://github.com/m2sf/m2pp/blob/master/cfg/config.sh

I am probably going to spin off the IO libraries into a portable IO library project with its own repo.

The license is LGPL2.1, so you can do whatever you want with it but if you fix a bug, you'll have to share the fix.

As an aside, we are also using this library for the M2-hosted R10 Bootstrap Kit, which was the primary motivation for M2PP in the first place. This means we're going to actively maintain this portable IO library.

regards

benjamin