mbed I/F binding for mruby
Dependents: mruby_mbed_web mirb_mbed
mbed-mruby
How to use
Class
include/mruby/numeric.h
- Committer:
- mzta
- Date:
- 2015-04-13
- Revision:
- 1:8ccd1d494a4b
- Parent:
- 0:158c61bb030f
File content as of revision 1:8ccd1d494a4b:
/* ** mruby/numeric.h - Numeric, Integer, Float, Fixnum class ** ** See Copyright Notice in mruby.h */ #ifndef MRUBY_NUMERIC_H #define MRUBY_NUMERIC_H #if defined(__cplusplus) extern "C" { #endif #define POSFIXABLE(f) ((f) <= MRB_INT_MAX) #define NEGFIXABLE(f) ((f) >= MRB_INT_MIN) #define FIXABLE(f) (POSFIXABLE(f) && NEGFIXABLE(f)) MRB_API mrb_value mrb_flo_to_fixnum(mrb_state *mrb, mrb_value val); MRB_API mrb_value mrb_fixnum_to_str(mrb_state *mrb, mrb_value x, int base); MRB_API mrb_float mrb_to_flo(mrb_state *mrb, mrb_value x); mrb_value mrb_fixnum_plus(mrb_state *mrb, mrb_value x, mrb_value y); mrb_value mrb_fixnum_minus(mrb_state *mrb, mrb_value x, mrb_value y); mrb_value mrb_fixnum_mul(mrb_state *mrb, mrb_value x, mrb_value y); mrb_value mrb_num_div(mrb_state *mrb, mrb_value x, mrb_value y); #define MRB_UINT_MAKE2(n) uint ## n ## _t #define MRB_UINT_MAKE(n) MRB_UINT_MAKE2(n) #define mrb_uint MRB_UINT_MAKE(MRB_INT_BIT) #ifdef MRB_WORD_BOXING # define MRB_INT_OVERFLOW_MASK ((mrb_uint)1 << (MRB_INT_BIT - 1 - MRB_FIXNUM_SHIFT)) #else # define MRB_INT_OVERFLOW_MASK ((mrb_uint)1 << (MRB_INT_BIT - 1)) #endif static inline mrb_bool mrb_int_add_overflow(mrb_int augend, mrb_int addend, mrb_int *sum) { mrb_uint x = (mrb_uint)augend; mrb_uint y = (mrb_uint)addend; mrb_uint z = (mrb_uint)(x + y); *sum = (mrb_int)z; return !!(((x ^ z) & (y ^ z)) & MRB_INT_OVERFLOW_MASK); } static inline mrb_bool mrb_int_sub_overflow(mrb_int minuend, mrb_int subtrahend, mrb_int *difference) { mrb_uint x = (mrb_uint)minuend; mrb_uint y = (mrb_uint)subtrahend; mrb_uint z = (mrb_uint)(x - y); *difference = (mrb_int)z; return !!(((x ^ z) & (~y ^ z)) & MRB_INT_OVERFLOW_MASK); } #undef MRB_INT_OVERFLOW_MASK #undef mrb_uint #undef MRB_UINT_MAKE #undef MRB_UINT_MAKE2 #if defined(__cplusplus) } /* extern "C" { */ #endif #endif /* MRUBY_NUMERIC_H */