shithub: sl

ref: bfe38a2454609a60bffe2f59340b075faeca7c4d
dir: /src/plan9/platform.h/

#pragma once

#include <u.h>
#include <libc.h>
#include <ctype.h>
#include <mp.h>

#ifdef NDEBUG
#undef assert
#define assert(x)
#define static_assert(a,b)
#else
#define static_assert_cat(a, b) a##b
#define static_assert_name(line) static_assert_cat(static_assert_, line)
#define static_assert(must_be_true, message) \
	static const void *static_assert_name(__LINE__) \
		[must_be_true ? 2 : -1] = { \
			message, \
			static_assert_name(__LINE__), \
		}
#endif

#define __os_name__ "plan9"

int sl_popcount(unsigned int w);
int sl_clz(unsigned int x);

#define sl_setjmp(e) setjmp((e))
#define sl_longjmp(e, v) longjmp((e), (v))

extern double D_PNAN, D_PINF;

#if defined(__amd64__) || \
    defined(__arm64__) || \
    defined(__mips64__) || \
    defined(__power64__) || \
    defined(__sparc64__)
#define BITS64
#define PRIdPTR PRId64
#define PRIuPTR PRIu64
typedef long long ssize;
#else
#define PRIdPTR "ld"
#define PRIuPTR "lud"
typedef long ssize;
#endif

#if defined(__386__) || defined(__amd64__) || defined(__arm64__)
#define MEM_UNALIGNED_ACCESS
#endif

#define unsetenv(name) putenv(name, "")
#define setenv(name, val, overwrite) putenv(name, val)
#define exit(x) exits((x) ? "error" : nil)
#define isinf(x) isInf(x, 0)
#define isnan(x) isNaN(x)

#define getcwd getwd
#define vsnprintf vsnprint
#define vdprintf vfprint
#define snprintf snprint
#define strcasecmp cistrcmp
#define lseek seek
#define towupper toupperrune
#define towlower tolowerrune
#define iswalpha isalpharune
#define signbit(r) ((*(u64int*)&(r)) & (1ULL<<63))
#define isfinite(d) (((*(u64int*)&(d))&0x7ff0000000000000ULL) != 0x7ff0000000000000ULL)

#define PRId32 "d"
#define PRIu32 "ud"
#define PRIx32 "x"
#define PRId64 "lld"
#define PRIu64 "llud"
#define PRIx64 "llx"

#define INT32_MAX 0x7fffffff
#define UINT32_MAX 0xffffffffU
#define INT32_MIN (-INT32_MAX-1)
#define INT64_MIN ((s64int)0x8000000000000000ULL)
#define INT64_MAX 0x7fffffffffffffffLL
#define UINT64_MAX 0xffffffffffffffffULL
#define ULONG_MAX UINT32_MAX
#define DBL_MANT_DIG 53
#define FLT_MANT_DIG 24

#define PATHSEP '/'
#define PATHSEPSTRING "/"
#define PATHLISTSEP ':'
#define PATHLISTSEPSTRING ":"
#define ISPATHSEP(c) ((c) == '/')

enum {
	SEEK_SET,
	SEEK_CUR,
	SEEK_END,

	STDIN_FILENO = 0,
	STDOUT_FILENO,
	STDERR_FILENO,
};

#define O_RDWR ORDWR
#define O_WRONLY OWRITE
#define O_RDONLY OREAD
#define O_TRUNC OTRUNC
#define F_OK 0

#define LITTLE_ENDIAN 1234
#define BIG_ENDIAN 4321

#if defined(__mips__) || \
    defined(__power__) || defined(__power64__) || \
    defined(__sparc__) || defined(__sparc64__)
#define BYTE_ORDER BIG_ENDIAN
#else
#define BYTE_ORDER LITTLE_ENDIAN
#endif

typedef vlong soffset;
typedef enum { false, true } bool;

int ftruncate(int f, soffset sz);

#define sl_unlikely(x) (x)
#define sl_likely(x) (x)
#define sl_printfmt(x, y)
#define sl_thread(x) x
#define sl_prefetch(x)
#define sl_constfn
#define sl_purefn
#define sl_hotfn
#define sl_aligned(x)

/* FIXME(sigrid): s*_overflow_* can be more optimal */
#define sadd_overflow_64(a, b, c) ( \
  (b < 1) ? \
  ((INT64_MAX-(b) <= (a)) ? ((*(c)=(a)+(b)), 0) : 1) : \
  ((INT64_MAX-(b) >= (a)) ? ((*(c)=(a)+(b)), 0) : 1) \
)
#define smul_overflow_64(a, b, c) ( \
	((a)>0 ? ((b)>0 ? (a)>INT64_MAX/(b) : (b)<INT64_MIN/(a)) \
	       : ((b)>0 ? (a)<INT64_MIN/(b) : ((a)!=0 && (b)<INT64_MAX/(a)))) \
	? 1 \
	: ((*(c)=(a)*(b)), 0) \
)
#if defined(BITS64)
#define sadd_overflow(a, b, c) sadd_overflow_64(a, b, c)
#else
#define sadd_overflow(a, b, c) ( \
  (b < 1) ? \
  ((INT32_MAX-(b) <= (a)) ? ((*(c)=(a)+(b)), 0) : 1) : \
  ((INT32_MAX-(b) >= (a)) ? ((*(c)=(a)+(b)), 0) : 1) \
)
#endif

#include "mem.h"