1.7. Data Definitions for libm

This section defines global identifiers and their values that are associated with interfaces contained in libm. These definitions are organized into groups that correspond to system headers. This convention is used as a convenience for the reader, and does not imply the existence of these headers, or their content.

These definitions are intended to supplement those provided in the referenced underlying specifications.

This specification uses ISO/IEC 9899 C Language as the reference programming language, and data definitions are specified in ISO C format. The C language is used here as a convenient notation. Using a C language description of these data objects does not preclude their use by other programming languages.

1.7.1. complex.h


#define complex	_Complex

1.7.2. math.h


#define DOMAIN	1
#define SING	2

struct exception
{
  int type;
  char *name;
  double arg1;
  double arg2;
  double retval;
}
 ;
#define FP_NAN	0
#define FP_INFINITE	1
#define FP_ZERO	2
#define FP_SUBNORMAL	3
#define FP_NORMAL	4

#define isnormal(x)	(fpclassify (x) == FP_NORMAL)
#define isfinite(x)	(sizeof (x) == sizeof (float) ? __finitef (x) : sizeof (x) == sizeof (double)? __finite (x) : __finitel (x))
#define isinf(x)	(sizeof (x) == sizeof (float) ? __isinff (x): sizeof (x) == sizeof (double) ? __isinf (x) : __isinfl (x))
#define isnan(x)	(sizeof (x) == sizeof (float) ? __isnanf (x)  : sizeof (x) == sizeof (double) ? __isnan (x) : __isnanl (x))

#define HUGE_VAL	0x1.0p2047
#define HUGE_VALF	0x1.0p255f
#define HUGE_VALL	0x1.0p32767L

#define NAN	((float)0x7fc00000UL)
#define M_1_PI	0.31830988618379067154
#define M_LOG10E	0.43429448190325182765
#define M_2_PI	0.63661977236758134308
#define M_LN2	0.69314718055994530942
#define M_SQRT1_2	0.70710678118654752440
#define M_PI_4	0.78539816339744830962
#define M_2_SQRTPI	1.12837916709551257390
#define M_SQRT2	1.41421356237309504880
#define M_LOG2E	1.4426950408889634074
#define M_PI_2	1.57079632679489661923
#define M_LN10	2.30258509299404568402
#define M_E	2.7182818284590452354
#define M_PI	3.14159265358979323846
#define INFINITY	HUGE_VALF

#define MATH_ERRNO	1
#define MATH_ERREXCEPT	2

#define isunordered(u, v)	(__extension__({ __typeof__(u) __u = (u); __typeof__(v) __v = (v);fpclassify (__u) == FP_NAN || fpclassify (__v) == FP_NAN; }))
#define islessgreater(x, y)	(__extension__({ __typeof__(x) __x = (x); __typeof__(y) __y = (y);!isunordered (__x, __y) & & (__x < __y || __y < __x); }))
#define isless(x,y)	(__extension__({ __typeof__(x) __x = (x); __typeof__(y) __y = (y);!isunordered (__x, __y) & & __x < __y; }))
#define islessequal(x, y)	(__extension__({ __typeof__(x) __x = (x); __typeof__(y) __y = (y);!isunordered (__x, __y) & & __x <= __y; }))
#define isgreater(x,y)	(__extension__({ __typeof__(x) __x = (x); __typeof__(y) __y = (y);!isunordered (__x, __y) & & __x > __y; }))
#define isgreaterequal(x,y)	(__extension__({ __typeof__(x) __x = (x); __typeof__(y) __y = (y);!isunordered (__x, __y) & & __x >= __y; }))