/*
  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(__APPLE__) && defined(__MACH__)
#define MACOSX
#elif defined(__OpenBSD__)
#define OPENBSD
#elif defined(__FreeBSD__)
#define FREEBSD
#elif defined(_WIN32)
#define WIN32
#else
#error "unknown platform"
#endif

#if defined(OPENBSD) || defined(FREEBSD)
#if defined(__x86_64__)
#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(WIN32)
#define STDCALL __stdcall
#if defined(IMPORT_EXPORTS)
#define DLLEXPORT __declspec(dllimport)
#else
#define DLLEXPORT __declspec(dllexport)
#endif
#else
#define STDCALL
#define DLLEXPORT __attribute__((visibility("default")))
#endif

#if defined(LINUX)
#include <features.h>
#include <endian.h>
#define LITTLE_ENDIAN __LITTLE_ENDIAN
#define BIG_ENDIAN __BIG_ENDIAN
#define PDP_ENDIAN __PDP_ENDIAN
#define BYTE_ORDER __BYTE_ORDER
#elif defined(MACOSX) || defined(OPENBSD) || defined(FREEBSD)
#include <machine/endian.h>
#define __LITTLE_ENDIAN LITTLE_ENDIAN
#define __BIG_ENDIAN BIG_ENDIAN
#define __PDP_ENDIAN PDP_ENDIAN
#define __BYTE_ORDER BYTE_ORDER
#elif defined(WIN32)
#define __LITTLE_ENDIAN 1234
#define __BIG_ENDIAN 4321
#define __PDP_ENDIAN 3412
#define __BYTE_ORDER __LITTLE_ENDIAN
#define __FLOAT_WORD_ORDER __LITTLE_ENDIAN
#define LITTLE_ENDIAN __LITTLE_ENDIAN
#define BIG_ENDIAN __BIG_ENDIAN
#define PDP_ENDIAN __PDP_ENDIAN
#define BYTE_ORDER __BYTE_ORDER
#else
#error "unknown platform"
#endif

#define LLT_ALLOC(n) malloc(n)
#define LLT_REALLOC(p, n) realloc((p), (n))
#define LLT_FREE(x) free(x)

typedef int bool_t;

#if defined(__INTEL_COMPILER) && defined(WIN32)
#define STATIC_INLINE static
#define INLINE
#ifdef BITS64
typedef unsigned long size_t;
#else
typedef unsigned int size_t;
#endif
#else
#define STATIC_INLINE static inline
#define INLINE inline
#endif

typedef unsigned char byte_t; /* 1 byte */
#if defined(WIN32)
typedef short int16_t;
typedef int int32_t;
typedef long long int64_t;
typedef unsigned char u_int8_t;
typedef unsigned short u_int16_t;
typedef unsigned int u_int32_t;
#ifdef BITS64
typedef unsigned long u_int64_t;
#else
typedef unsigned long long u_int64_t;
#endif
#ifdef __INTEL_COMPILER
typedef signed char int8_t;
typedef short int16_t;
typedef int int32_t;
#endif
#else
#include <sys/types.h>
#endif

#ifdef BITS64
#define TOP_BIT 0x8000000000000000
#define NBITS 64
typedef unsigned long uint_t;  // preferred int type on platform
typedef long int_t;
typedef int64_t offset_t;
typedef u_int64_t index_t;
typedef int64_t ptrint_t;  // pointer-size int
typedef u_int64_t u_ptrint_t;
#else
#define TOP_BIT 0x80000000
#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

typedef u_int8_t uint8_t;
typedef u_int16_t uint16_t;
typedef u_int32_t uint32_t;
typedef u_int64_t uint64_t;
typedef u_ptrint_t uptrint_t;

#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

#define DBL_MAXINT 9007199254740992LL
#define FLT_MAXINT 16777216
#define U64_MAX 18446744073709551615ULL
#define S64_MAX 9223372036854775807LL
#define S64_MIN (-S64_MAX - 1LL)
#define BIT63 0x8000000000000000LL
#define U32_MAX 4294967295L
#define S32_MAX 2147483647L
#define S32_MIN (-S32_MAX - 1L)
#define BIT31 0x80000000

#define DBL_EPSILON 2.2204460492503131e-16
#define FLT_EPSILON 1.192092896e-7
#define DBL_MAX 1.7976931348623157e+308
#define DBL_MIN 2.2250738585072014e-308
#define FLT_MAX 3.402823466e+38
#define FLT_MIN 1.175494351e-38
#define LOG2_10 3.3219280948873626
#define rel_zero(a, b) (fabs((a) / (b)) < DBL_EPSILON)
#define sign_bit(r) ((*(int64_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) \
    (((*(int64_t *)&(d)) & 0x7ff0000000000000LL) != 0x7ff0000000000000LL)
#define DNAN(d) ((d) != (d))

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;