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-rw-r--r--include/mruby/compile.h1
-rw-r--r--src/numeric.c4
2 files changed, 5 insertions, 0 deletions
diff --git a/include/mruby/compile.h b/include/mruby/compile.h
index 3ccaf9f6a..459d88596 100644
--- a/include/mruby/compile.h
+++ b/include/mruby/compile.h
@@ -163,6 +163,7 @@ struct mrb_parser_state {
MRB_API struct mrb_parser_state* mrb_parser_new(mrb_state*);
MRB_API void mrb_parser_free(struct mrb_parser_state*);
MRB_API void mrb_parser_parse(struct mrb_parser_state*,mrbc_context*);
+MRB_API double mrb_float_read(const char*, char**);
MRB_API void mrb_parser_set_filename(struct mrb_parser_state*, char const*);
MRB_API char const* mrb_parser_get_filename(struct mrb_parser_state*, uint16_t idx);
diff --git a/src/numeric.c b/src/numeric.c
index 25a411de8..a9a2a641b 100644
--- a/src/numeric.c
+++ b/src/numeric.c
@@ -357,7 +357,11 @@ flo_shift(mrb_state *mrb, mrb_value x, mrb_int width)
while (width++) {
val /= 2;
}
+#if defined(_ISOC99_SOURCE)
val = trunc(val);
+#else
+ val = val > 0 ? floor(val) : ceil(val);
+#endif
if (val == 0 && mrb_float(x) < 0) {
return mrb_fixnum_value(-1);
}