diff options
| -rw-r--r-- | ChangeLog | 6 | ||||
| -rw-r--r-- | util.c | 14 |
2 files changed, 13 insertions, 7 deletions
@@ -1,4 +1,8 @@ -Mon Aug 16 19:22:31 2010 Nobuyoshi Nakada <nobu@ruby-lang.org> +Mon Aug 16 19:23:19 2010 Nobuyoshi Nakada <nobu@ruby-lang.org> + + * util.c (ruby_dtoa, ruby_hdtoa): use same representations for + Infinity and NaN. a part of a patch from Peter Weldon at + [ruby-core:31725]. * util.c (ruby_hdtoa): fixed buffer overrun. based on a patch from Peter Weldon at [ruby-core:31725]. @@ -3145,6 +3145,10 @@ freedtoa(char *s) } #endif +static const char INFSTR[] = "Infinity"; +static const char NANSTR[] = "NaN"; +static const char ZEROSTR[] = "0"; + /* dtoa for IEEE arithmetic (dmg): convert double to ASCII string. * * Inspired by "How to Print Floating-Point Numbers Accurately" by @@ -3263,9 +3267,9 @@ ruby_dtoa(double d_, int mode, int ndigits, int *decpt, int *sign, char **rve) *decpt = 9999; #ifdef IEEE_Arith if (!word1(d) && !(word0(d) & 0xfffff)) - return rv_strdup("Infinity", rve); + return rv_strdup(INFSTR, rve); #endif - return rv_strdup("NaN", rve); + return rv_strdup(NANSTR, rve); } #endif #ifdef IBM @@ -3273,7 +3277,7 @@ ruby_dtoa(double d_, int mode, int ndigits, int *decpt, int *sign, char **rve) #endif if (!dval(d)) { *decpt = 1; - return rv_strdup("0", rve); + return rv_strdup(ZEROSTR, rve); } #ifdef SET_INEXACT @@ -3897,8 +3901,6 @@ ruby_each_words(const char *str, void (*func)(const char*, int, void*), void *ar #define DBL_MANH_SIZE 20 #define DBL_MANL_SIZE 32 -#define INFSTR "Infinity" -#define NANSTR "NaN" #define DBL_ADJ (DBL_MAX_EXP - 2) #define SIGFIGS ((DBL_MANT_DIG + 3) / 4 + 1) #define dexp_get(u) ((int)(word0(u) >> Exp_shift) & ~Exp_msk1) @@ -3959,7 +3961,7 @@ ruby_hdtoa(double d, const char *xdigs, int ndigits, int *decpt, int *sign, } else if (d == 0.0) { /* FP_ZERO */ *decpt = 1; - return rv_strdup("0", rve); + return rv_strdup(ZEROSTR, rve); } else if (dexp_get(u)) { /* FP_NORMAL */ *decpt = dexp_get(u) - DBL_ADJ; |