/** ** @file mruby/numeric.h - Numeric, Integer, Float class ** ** See Copyright Notice in mruby.h */ #ifndef MRUBY_NUMERIC_H #define MRUBY_NUMERIC_H #include "common.h" /** * Numeric class and it's sub-classes. * * Integer and Float */ MRB_BEGIN_DECL #define TYPED_POSFIXABLE(f,t) ((f) <= (t)MRB_FIXNUM_MAX) #define TYPED_NEGFIXABLE(f,t) ((f) >= (t)MRB_FIXNUM_MIN) #define TYPED_FIXABLE(f,t) (TYPED_POSFIXABLE(f,t) && TYPED_NEGFIXABLE(f,t)) #define POSFIXABLE(f) TYPED_POSFIXABLE(f,mrb_int) #define NEGFIXABLE(f) TYPED_NEGFIXABLE(f,mrb_int) #define FIXABLE(f) TYPED_FIXABLE(f,mrb_int) #ifndef MRB_NO_FLOAT #ifdef MRB_INT64 #define FIXABLE_FLOAT(f) ((f)>=-9223372036854775808.0 && (f)<9223372036854775808.0) #else #define FIXABLE_FLOAT(f) TYPED_FIXABLE(f,mrb_float) #endif #endif MRB_API mrb_value mrb_num_plus(mrb_state *mrb, mrb_value x, mrb_value y); MRB_API mrb_value mrb_num_minus(mrb_state *mrb, mrb_value x, mrb_value y); MRB_API mrb_value mrb_num_mul(mrb_state *mrb, mrb_value x, mrb_value y); MRB_API mrb_value mrb_integer_to_str(mrb_state *mrb, mrb_value x, mrb_int base); MRB_API char *mrb_int_to_cstr(char *buf, size_t len, mrb_int n, mrb_int base); /* internal function(s) */ mrb_int mrb_div_int(mrb_state *mrb, mrb_int x, mrb_int y); /* obsolete function(s); will be removed */ #define mrb_fixnum_to_str(mrb, x, base) mrb_integer_to_str(mrb, x, base) #ifndef __has_builtin #define __has_builtin(x) 0 #endif #if (defined(__GNUC__) && __GNUC__ >= 5) || \ (__has_builtin(__builtin_add_overflow) && \ __has_builtin(__builtin_sub_overflow) && \ __has_builtin(__builtin_mul_overflow)) # define MRB_HAVE_TYPE_GENERIC_CHECKED_ARITHMETIC_BUILTINS #endif /* // Clang 3.8 and 3.9 have problem compiling mruby in 32-bit mode, when MRB_INT64 is set // because of missing __mulodi4 and similar functions in its runtime. We need to use custom // implementation for them. */ #ifdef MRB_HAVE_TYPE_GENERIC_CHECKED_ARITHMETIC_BUILTINS #if defined(__clang__) && (__clang_major__ == 3) && (__clang_minor__ >= 8) && \ defined(MRB_32BIT) && defined(MRB_INT64) #undef MRB_HAVE_TYPE_GENERIC_CHECKED_ARITHMETIC_BUILTINS #endif #endif #ifdef MRB_HAVE_TYPE_GENERIC_CHECKED_ARITHMETIC_BUILTINS static inline mrb_bool mrb_int_add_overflow(mrb_int augend, mrb_int addend, mrb_int *sum) { return __builtin_add_overflow(augend, addend, sum); } static inline mrb_bool mrb_int_sub_overflow(mrb_int minuend, mrb_int subtrahend, mrb_int *difference) { return __builtin_sub_overflow(minuend, subtrahend, difference); } static inline mrb_bool mrb_int_mul_overflow(mrb_int multiplier, mrb_int multiplicand, mrb_int *product) { return __builtin_mul_overflow(multiplier, multiplicand, product); } #else #define MRB_INT_OVERFLOW_MASK ((mrb_uint)1 << (MRB_INT_BIT - 1)) static inline mrb_bool mrb_int_add_overflow(mrb_int a, mrb_int b, mrb_int *c) { mrb_uint x = (mrb_uint)a; mrb_uint y = (mrb_uint)b; mrb_uint z = (mrb_uint)(x + y); *c = (mrb_int)z; return !!(((x ^ z) & (y ^ z)) & MRB_INT_OVERFLOW_MASK); } static inline mrb_bool mrb_int_sub_overflow(mrb_int a, mrb_int b, mrb_int *c) { mrb_uint x = (mrb_uint)a; mrb_uint y = (mrb_uint)b; mrb_uint z = (mrb_uint)(x - y); *c = (mrb_int)z; return !!(((x ^ z) & (~y ^ z)) & MRB_INT_OVERFLOW_MASK); } static inline mrb_bool mrb_int_mul_overflow(mrb_int a, mrb_int b, mrb_int *c) { #ifdef MRB_INT32 int64_t n = (int64_t)a * b; *c = (mrb_int)n; return n > MRB_INT_MAX || n < MRB_INT_MIN; #else /* MRB_INT64 */ if (a > 0 && b > 0 && a > MRB_INT_MAX / b) return TRUE; if (a < 0 && b > 0 && a < MRB_INT_MIN / b) return TRUE; if (a > 0 && b < 0 && b < MRB_INT_MIN / a) return TRUE; if (a < 0 && b < 0 && (a <= MRB_INT_MIN || b <= MRB_INT_MIN || -a > MRB_INT_MAX / -b)) return TRUE; *c = a * b; return FALSE; #endif } #undef MRB_INT_OVERFLOW_MASK #endif #ifndef MRB_NO_FLOAT # define MRB_FLT_RADIX FLT_RADIX # ifdef MRB_USE_FLOAT32 # define MRB_FLT_MANT_DIG FLT_MANT_DIG # define MRB_FLT_EPSILON FLT_EPSILON # define MRB_FLT_DIG FLT_DIG # define MRB_FLT_MIN_EXP FLT_MIN_EXP # define MRB_FLT_MIN FLT_MIN # define MRB_FLT_MIN_10_EXP FLT_MIN_10_EXP # define MRB_FLT_MAX_EXP FLT_MAX_EXP # define MRB_FLT_MAX FLT_MAX # define MRB_FLT_MAX_10_EXP FLT_MAX_10_EXP # else /* not MRB_USE_FLOAT32 */ # define MRB_FLT_MANT_DIG DBL_MANT_DIG # define MRB_FLT_EPSILON DBL_EPSILON # define MRB_FLT_DIG DBL_DIG # define MRB_FLT_MIN_EXP DBL_MIN_EXP # define MRB_FLT_MIN DBL_MIN # define MRB_FLT_MIN_10_EXP DBL_MIN_10_EXP # define MRB_FLT_MAX_EXP DBL_MAX_EXP # define MRB_FLT_MAX DBL_MAX # define MRB_FLT_MAX_10_EXP DBL_MAX_10_EXP # endif /* MRB_USE_FLOAT32 */ MRB_API mrb_value mrb_float_to_integer(mrb_state *mrb, mrb_value val); /* internal functions */ mrb_float mrb_div_float(mrb_float x, mrb_float y); mrb_value mrb_float_to_str(mrb_state *mrb, mrb_value x, const char *fmt); int mrb_format_float(mrb_float f, char *buf, size_t buf_size, char fmt, int prec, char sign); /* obsolete functions; will be removed */ #define mrb_flo_to_fixnum(mrb, val) mrb_float_to_integer(mrb, val) #define mrb_to_flo(mrb, x) mrb_as_float(mrb, x) #endif /* MRB_NO_FLOAT */ MRB_END_DECL #endif /* MRUBY_NUMERIC_H */