/usr/include/mruby/numeric.h is in libmruby-dev 1.2.0+20160315+git4f20d58a-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 | /*
** mruby/numeric.h - Numeric, Integer, Float, Fixnum 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, Float and Fixnum
*/
MRB_BEGIN_DECL
#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);
/* ArgumentError if format string doesn't match /%(\.[0-9]+)?[aAeEfFgG]/ */
MRB_API mrb_value mrb_float_to_str(mrb_state *mrb, mrb_value x, const char *fmt);
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)
#define MRB_INT_OVERFLOW_MASK ((mrb_uint)1 << (MRB_INT_BIT - 1 - MRB_FIXNUM_SHIFT))
/* Idea from Potion: https://github.com/perl11/potion (MIT) */
#if (defined(__clang__) && ((__clang_major__ > 3) || (__clang_major__ == 3 && __clang_minor__ >= 4))) \
|| (defined(__GNUC__) && __GNUC__ >= 5)
static inline mrb_bool
mrb_int_add_overflow(mrb_int augend, mrb_int addend, mrb_int *sum)
{
mrb_bool of;
#ifdef MRB_INT64
long long val;
of = __builtin_saddll_overflow(augend, addend, &val) ||
#else
int val;
of = __builtin_sadd_overflow(augend, addend, &val) ||
#endif
(val > MRB_INT_MAX) || (val < MRB_INT_MIN);
*sum = (mrb_int) val;
return of;
}
static inline mrb_bool
mrb_int_sub_overflow(mrb_int minuend, mrb_int subtrahend, mrb_int *difference)
{
mrb_bool of;
#ifdef MRB_INT64
long long val;
of = __builtin_ssubll_overflow(minuend, subtrahend, &val) ||
#else
int val;
of = __builtin_ssub_overflow(minuend, subtrahend, &val) ||
#endif
(val > MRB_INT_MAX) || (val < MRB_INT_MIN);
*difference = (mrb_int) val;
return of;
}
#else
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);
}
#endif
#undef MRB_INT_OVERFLOW_MASK
#undef mrb_uint
#undef MRB_UINT_MAKE
#undef MRB_UINT_MAKE2
MRB_END_DECL
#endif /* MRUBY_NUMERIC_H */
|