mirror of
https://github.com/mruby/mruby
synced 2026-06-08 16:11:16 +00:00
Yukihiro "Matz" Matsumoto
afca99a40b
The ISO standard does not include implicit type conversion using `to_int`. This implicit conversion often causes vulnerability. There will be no more attacks like #4120. In addition, we have added internal convenience method `__to_int` which does type check and conversion (from floats).
100 lines
2.0 KiB
C
100 lines
2.0 KiB
C
#include <limits.h>
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#include <mruby.h>
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static inline mrb_int
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to_int(mrb_state *mrb, mrb_value x)
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{
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x = mrb_to_int(mrb, x);
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return mrb_fixnum(x);
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}
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/*
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* Document-method: Integer#chr
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* call-seq:
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* int.chr -> string
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*
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* Returns a string containing the character represented by the +int+'s value
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* according to +encoding+.
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*
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* 65.chr #=> "A"
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* 230.chr #=> "\xE6"
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*/
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static mrb_value
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mrb_int_chr(mrb_state *mrb, mrb_value x)
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{
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mrb_int chr;
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char c;
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chr = to_int(mrb, x);
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if (chr >= (1 << CHAR_BIT)) {
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mrb_raisef(mrb, E_RANGE_ERROR, "%S out of char range", x);
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}
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c = (char)chr;
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return mrb_str_new(mrb, &c, 1);
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}
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/*
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* call-seq:
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* int.allbits?(mask) -> true or false
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*
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* Returns +true+ if all bits of <code>+int+ & +mask+</code> are 1.
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*/
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static mrb_value
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mrb_int_allbits(mrb_state *mrb, mrb_value self)
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{
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mrb_int n, m;
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mrb_get_args(mrb, "i", &m);
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n = to_int(mrb, self);
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return mrb_bool_value((n & m) == m);
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}
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/*
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* call-seq:
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* int.anybits?(mask) -> true or false
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*
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* Returns +true+ if any bits of <code>+int+ & +mask+</code> are 1.
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*/
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static mrb_value
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mrb_int_anybits(mrb_state *mrb, mrb_value self)
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{
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mrb_int n, m;
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mrb_get_args(mrb, "i", &m);
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n = to_int(mrb, self);
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return mrb_bool_value((n & m) != 0);
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}
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/*
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* call-seq:
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* int.nobits?(mask) -> true or false
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*
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* Returns +true+ if no bits of <code>+int+ & +mask+</code> are 1.
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*/
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static mrb_value
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mrb_int_nobits(mrb_state *mrb, mrb_value self)
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{
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mrb_int n, m;
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mrb_get_args(mrb, "i", &m);
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n = to_int(mrb, self);
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return mrb_bool_value((n & m) == 0);
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}
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void
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mrb_mruby_numeric_ext_gem_init(mrb_state* mrb)
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{
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struct RClass *i = mrb_module_get(mrb, "Integral");
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mrb_define_method(mrb, i, "chr", mrb_int_chr, MRB_ARGS_NONE());
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mrb_define_method(mrb, i, "allbits?", mrb_int_allbits, MRB_ARGS_REQ(1));
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mrb_define_method(mrb, i, "anybits?", mrb_int_anybits, MRB_ARGS_REQ(1));
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mrb_define_method(mrb, i, "nobits?", mrb_int_nobits, MRB_ARGS_REQ(1));
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}
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void
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mrb_mruby_numeric_ext_gem_final(mrb_state* mrb)
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{
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}
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