Scheme_Object * scheme_abs(int argc, Scheme_Object *argv[]) { Scheme_Type t; Scheme_Object *o; o = argv[0]; if (SCHEME_INTP(o)) { intptr_t n = SCHEME_INT_VAL(o); return scheme_make_integer_value(ABS(n)); } t = _SCHEME_TYPE(o); #ifdef MZ_USE_SINGLE_FLOATS if (t == scheme_float_type) return scheme_make_float(fabs(SCHEME_FLT_VAL(o))); #endif if (t == scheme_double_type) return scheme_make_double(fabs(SCHEME_DBL_VAL(o))); if (t == scheme_bignum_type) { if (SCHEME_BIGPOS(o)) return o; return scheme_bignum_negate(o); } if (t == scheme_rational_type) { if (scheme_is_rational_positive(o)) return o; else return scheme_rational_negate(o); } NEED_REAL(abs); ESCAPED_BEFORE_HERE; }
int scheme_is_zero(const Scheme_Object *o) { Scheme_Type t; if (SCHEME_INTP(o)) return o == zeroi; t = _SCHEME_TYPE(o); #ifdef MZ_USE_SINGLE_FLOATS if (t == scheme_float_type) { # ifdef NAN_EQUALS_ANYTHING if (MZ_IS_NAN(SCHEME_FLT_VAL(o))) return 0; # endif return SCHEME_FLT_VAL(o) == 0.0f; } #endif if (t == scheme_double_type) { #ifdef NAN_EQUALS_ANYTHING if (MZ_IS_NAN(SCHEME_DBL_VAL(o))) return 0; #endif return SCHEME_DBL_VAL(o) == 0.0; } if (t == scheme_complex_type) { if (scheme_is_zero(scheme_complex_imaginary_part(o))) return scheme_is_zero(scheme_complex_real_part(o)); return 0; } if ((t >= scheme_bignum_type) && (t <= scheme_complex_type)) return 0; return -1; }
Scheme_Object * scheme_sub1 (int argc, Scheme_Object *argv[]) { Scheme_Type t; Scheme_Object *o = argv[0]; if (SCHEME_INTP(o)) { intptr_t v; v = SCHEME_INT_VAL(o); if (v > -(0x3FFFFFFF)) return scheme_make_integer(SCHEME_INT_VAL(o) - 1); else { Small_Bignum b; return scheme_bignum_sub1(scheme_make_small_bignum(v, &b)); } } t = _SCHEME_TYPE(o); #ifdef MZ_USE_SINGLE_FLOATS if (t == scheme_float_type) return scheme_make_float(SCHEME_FLT_VAL(o) - 1.0f); #endif if (t == scheme_double_type) return scheme_make_double(SCHEME_DBL_VAL(o) - 1.0); if (t == scheme_bignum_type) return scheme_bignum_sub1(o); if (t == scheme_rational_type) return scheme_rational_sub1(o); if (t == scheme_complex_type) return scheme_complex_sub1(o); NEED_NUMBER(sub1); ESCAPED_BEFORE_HERE; }