1 /** 2 * This file has no copyright assigned and is placed in the Public Domain. 3 * This file is part of the mingw-w64 runtime package. 4 * No warranty is given; refer to the file DISCLAIMER.PD within this package. 5 */ 6 7 #include <math.h> 8 #include <limits.h> 9 10 extern double (* __MINGW_IMP_SYMBOL(_logb))(double); 11 logb(double x)12double logb(double x) 13 { 14 if (isinf(x)) 15 return INFINITY; 16 return __MINGW_IMP_SYMBOL(_logb)(x); 17 } 18