Scm_BignumToString 2044 src/gauche.h   SCM_EXTERN ScmObj Scm_BignumToString(ScmBignum *b, int radix, int use_upper);
Scm_BignumToString 2125 src/number.c               r = Scm_BignumToString(SCM_BIGNUM(Scm_MakeBignumFromSI(SCM_INT_VALUE(obj))),
Scm_BignumToString 2130 src/number.c           r = Scm_BignumToString(SCM_BIGNUM(obj), radix, use_upper);