setup: move cffi stuff to mercurial/cffi
This patch moves all setup*cffi stuff to mercurial/cffi to make the root
directory cleaner. The idea was from mpm [1]:
> It seems like we could have a fair amount of cffi definitions, and
> cluttering the root directory (or mercurial/) with them is probably not
> a great long-term solution. We could probably add a cffi/ directory
> under mercurial/ to parallel pure/.
[1]: https://www.mercurial-scm.org/pipermail/mercurial-devel/2016-July/086442.html
#ifndef _HG_COMPAT_H_
#define _HG_COMPAT_H_
#ifdef _WIN32
#ifdef _MSC_VER
/* msvc 6.0 has problems */
#define inline __inline
#if defined(_WIN64)
typedef __int64 ssize_t;
#else
typedef int ssize_t;
#endif
typedef signed char int8_t;
typedef short int16_t;
typedef long int32_t;
typedef __int64 int64_t;
typedef unsigned char uint8_t;
typedef unsigned short uint16_t;
typedef unsigned long uint32_t;
typedef unsigned __int64 uint64_t;
#else
#include <stdint.h>
#endif
#else
/* not windows */
#include <sys/types.h>
#if defined __BEOS__ && !defined __HAIKU__
#include <ByteOrder.h>
#else
#include <arpa/inet.h>
#endif
#include <inttypes.h>
#endif
#if defined __hpux || defined __SUNPRO_C || defined _AIX
#define inline
#endif
#ifdef __linux
#define inline __inline
#endif
#endif