ref: a5e537ceac98fde7b3050b1d310764caad9124da
dir: /llt/dtypes.h/
#ifndef __DTYPES_H_
#define __DTYPES_H_
/*
This file defines sane integer types for our target platforms. This
library only runs on machines with the following characteristics:
- supports integer word sizes of 8, 16, 32, and 64 bits
- uses unsigned and signed 2's complement representations
- all pointer types are the same size
- there is an integer type with the same size as a pointer
Some features require:
- IEEE 754 single- and double-precision floating point
We assume the LP64 convention for 64-bit platforms.
*/
#if defined(__gnu_linux__)
# define LINUX
#elif defined(__OpenBSD__)
# define OPENBSD
#elif defined(__FreeBSD__)
# define FREEBSD
#elif defined(__NetBSD__)
# define NETBSD
#elif !defined(PLAN9)
# error "unknown platform"
#endif
#if defined(OPENBSD) || defined(FREEBSD) || defined(NETBSD) || defined(PLAN9)
#if defined(__x86_64__) || defined(__amd64__) || defined(__arm64__)
# define __SIZEOF_POINTER__ 8
#else
# define __SIZEOF_POINTER__ 4
#endif
#endif
#if !defined (BITS32) && !defined (BITS64)
#ifndef __SIZEOF_POINTER__
# error "__SIZEOF_POINTER__ undefined"
#endif
#if( 8 == __SIZEOF_POINTER__ )
# define BITS64
#elif( 4 == __SIZEOF_POINTER__ )
# define BITS32
#else
# error "this is one weird machine"
#endif
#endif
#if defined(PLAN9)
#define STDCALL
#define DLLEXPORT
#else
# define STDCALL
# define DLLEXPORT __attribute__ ((visibility("default")))
#endif
#if defined(PLAN9)
# define __LITTLE_ENDIAN 1234
# define __BIG_ENDIAN 4321
# define __BYTE_ORDER __LITTLE_ENDIAN
#else
# include <endian.h>
#endif
#ifndef BYTE_ORDER
# define LITTLE_ENDIAN __LITTLE_ENDIAN
# define BIG_ENDIAN __BIG_ENDIAN
# define BYTE_ORDER __BYTE_ORDER
#endif
#ifdef PLAN9
#define __attribute__(...)
#else
#define USED(x) (void)(x)
#endif
#ifdef BOEHM_GC
// boehm GC allocator
#include <gc.h>
#define LLT_ALLOC(n) GC_MALLOC(n)
#define LLT_REALLOC(p,n) GC_REALLOC((p),(n))
#define LLT_FREE(x) ((void)(x))
#else
// standard allocator
#define LLT_ALLOC(n) malloc(n)
#define LLT_REALLOC(p,n) realloc((p),(n))
#define LLT_FREE(x) free(x)
#endif
typedef int bool_t;
#if defined(BITS64)
#define ULONG64
#endif
#ifdef PLAN9
typedef usize size_t;
#ifdef BITS64
typedef long long ssize_t;
#else
typedef long ssize_t;
#endif
#define STATIC_INLINE static
#define INLINE
#ifndef NULL
#define NULL nil
#endif
#else
# define STATIC_INLINE static inline
# define INLINE inline
#endif
#if defined(PLAN9)
typedef s8int int8_t;
typedef s16int int16_t;
typedef s32int int32_t;
typedef s64int int64_t;
typedef u8int u_int8_t;
typedef u16int u_int16_t;
typedef u32int u_int32_t;
typedef u64int u_int64_t;
typedef u8int uint8_t;
typedef u16int uint16_t;
typedef u32int uint32_t;
typedef u64int uint64_t;
typedef vlong off_t;
typedef intptr intptr_t;
typedef uintptr uintptr_t;
#else
#include <sys/types.h>
#include <stdint.h>
#endif
typedef u_int8_t byte_t; /* 1 byte */
#ifdef BITS64
#define TOP_BIT 0x8000000000000000ULL
#define NBITS 64
typedef uint64_t uint_t; // preferred int type on platform
typedef int64_t int_t;
typedef int64_t offset_t;
typedef u_int64_t index_t;
typedef intptr_t ptrint_t; // pointer-size int
typedef uintptr_t u_ptrint_t;
#else
#define TOP_BIT 0x80000000UL
#define NBITS 32
typedef unsigned long uint_t;
typedef long int_t;
typedef int32_t offset_t;
typedef u_int32_t index_t;
typedef int32_t ptrint_t;
typedef u_int32_t u_ptrint_t;
#endif
#define LLT_ALIGN(x, sz) (((x) + (sz-1)) & (-sz))
// branch prediction annotations
#ifdef __GNUC__
#define __unlikely(x) __builtin_expect(!!(x), 0)
#define __likely(x) __builtin_expect(!!(x), 1)
#else
#define __unlikely(x) (x)
#define __likely(x) (x)
#endif
#ifndef PLAN9
#include <float.h>
#endif
#define DBL_MAXINT 9007199254740992LL
#define FLT_MAXINT 16777216
#define U64_MAX 18446744073709551615ULL
#define S64_MAX 9223372036854775807LL
#define S64_MIN (-S64_MAX - 1LL)
#define BIT63 0x8000000000000000ULL
#define U32_MAX 4294967295UL
#define S32_MAX 2147483647L
#define S32_MIN (-S32_MAX - 1L)
#define BIT31 0x80000000UL
#define LOG2_10 3.3219280948873626
#define rel_zero(a, b) (fabs((a)/(b)) < DBL_EPSILON)
#define sign_bit(r) ((*(uint64_t*)&(r)) & BIT63)
#define LABS(n) (((n)^((n)>>(NBITS-1))) - ((n)>>(NBITS-1)))
#define NBABS(n,nb) (((n)^((n)>>((nb)-1))) - ((n)>>((nb)-1)))
#define DFINITE(d) (((*(uint64_t*)&(d))&0x7ff0000000000000ULL)!=0x7ff0000000000000ULL)
extern double D_PNAN;
extern double D_NNAN;
extern double D_PINF;
extern double D_NINF;
extern float F_PNAN;
extern float F_NNAN;
extern float F_PINF;
extern float F_NINF;
#endif