That's what I tried and it didn't work. The C code in zlib is ... let's say complicated and strange [1]. My simple approach to do this with only one C file failed miserably with lots of hard to understand error codes. I didn't save any of these, but that wouldn't be helpful anyway. But generally that's the idea I tried to follow...

[1] Example code (from gzread.c):

/* Local functions */
local int gz_load OF((gz_statep, unsigned char *, unsigned, unsigned *));
local int gz_avail OF((gz_statep));
...
local z_size_t gz_read OF((gz_statep, voidp, z_size_t));
...
local int gz_load(state, buf, len, have)   <--
    gz_statep state;                       <--
    unsigned char *buf;                    <--
    unsigned len;                          <--
    unsigned *have;                        <--
{
    int ret;

This code doesn't compile with g++. I know this is an ancient C standard, but why does this not compile with a C++ compiler? Was this way to declare arguments dropped? And why are they using it in zlib?

Maybe we can find a way, but as I wrote before, for today I gave up. Sometimes sleeping a night and starting over again with a fresh mind helps...

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