[Zlib-devel] Explicit link to libc

[John Bowler]

From: Mark Adler
>Can we apply this same solution somehow in Windows?  Or has
>this problem been faced in the Windows world with a different
>standard solution?

I believe Windows NT always supported 64 bit sized files and SetFilePos has two arguments, the low 32 bits and, optionally, the high (SetFilePosEx does it properly with LARGE_INTEGER.)

The runtime, the C support library, seems to use the approach of providing a second API.  'fseek' is 32 bit throughout, but _fseeki64 is the same with a 64 bit offset (likewise _ftelli64).  That makes sense to me because fseek/ftell are actually speced in ANSI-C to return 'int'.

One other approach is to do fsetpos/fgetpos, because fpos_t is always an implementation defined type and, on Windows, it's always 64 bit (I think), but implemented in sub-plaform specific ways (struct, __int64 etc.)

John Bowler <jbowler at acm.org>