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authornobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2014-01-12 00:21:37 +0000
committernobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2014-01-12 00:21:37 +0000
commit5e9b7bacc3731b909ea6341d7158ef6b34e09f2d (patch)
tree13de30bb8713467ef344ade2c58ed34afe4baa0e /ext/bigdecimal/bigdecimal.c
parent0e9cad9a8e25282be170d3e4240bd2ba6ce1a419 (diff)
ruby/util.h: DECIMAL_SIZE_OF_BITS
* include/ruby/util.h (DECIMAL_SIZE_OF_BITS): a preprocessor constant macro to approximate decimal representation size of n-bits integer. * iseq.c (register_label): use DECIMAL_SIZE_OF_BITS for better approximation. * ext/bigdecimal/bigdecimal.c (BigMath_s_log): ditto. * common.mk (iseq.o), ext/bigdecimal/depend (bigdecimal.o): add dependency to ruby/util.h for DECIMAL_SIZE_OF_BITS. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44562 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'ext/bigdecimal/bigdecimal.c')
-rw-r--r--ext/bigdecimal/bigdecimal.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/ext/bigdecimal/bigdecimal.c b/ext/bigdecimal/bigdecimal.c
index c5a3326..16fba22 100644
--- a/ext/bigdecimal/bigdecimal.c
+++ b/ext/bigdecimal/bigdecimal.c
@@ -18,6 +18,7 @@
# define BIGDECIMAL_ENABLE_VPRINT 1
#endif
#include "bigdecimal.h"
+#include "ruby/util.h"
#ifndef BIGDECIMAL_DEBUG
# define NDEBUG
@@ -2919,7 +2920,7 @@ get_vp_value:
RB_GC_GUARD(vn) = SSIZET2NUM(n);
expo = VpExponent10(vx);
if (expo < 0 || expo >= 3) {
- char buf[SIZEOF_VALUE * CHAR_BIT / 3 + 4];
+ char buf[DECIMAL_SIZE_OF_BITS(SIZEOF_VALUE * CHAR_BIT) + 4];
snprintf(buf, sizeof(buf), "1E%"PRIdVALUE, -expo);
x = BigDecimal_mult2(x, ToValue(VpCreateRbObject(1, buf)), vn);
}