数值定义

#include <glib.h>

#define             G_IEEE754_FLOAT_BIAS
#define             G_IEEE754_DOUBLE_BIAS
union               GFloatIEEE754;
union               GDoubleIEEE754;


#define             G_E
#define             G_LN2
#define             G_LN10
#define             G_PI
#define             G_PI_2
#define             G_PI_4
#define             G_SQRT2
#define             G_LOG_2_BASE_10

#define G_IEEE754_FLOAT_BIAS (127)
#define G_IEEE754_DOUBLE_BIAS (1023)

union GFloatIEEE754
union GDoubleIEEE754

#define G_E     2.7182818284590452353602874713526624977572470937000
#define G_LN2   0.69314718055994530941723212145817656807550013436026
#define G_LN10  2.3025850929940456840179914546843642076011014886288
#define G_PI    3.1415926535897932384626433832795028841971693993751
#define G_PI_2  1.5707963267948966192313216916397514420985846996876
#define G_PI_4  0.78539816339744830961566084581987572104929234984378
#define G_SQRT2 1.4142135623730950488016887242096980785696718753769
#define G_LOG_2_BASE_10           (0.30102999566398119521)