Comment on the range of decimal exponents

fix #110
ulfjack · Apr 19, 2019 · 00ecce8 · 00ecce8
1 parent 59661c3
commit 00ecce8
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diff --git a/ryu/d2s.c b/ryu/d2s.c
@@ -205,6 +205,8 @@ static inline uint32_t decimalLength17(const uint64_t v) {
 // A floating decimal representing m * 10^e.
 typedef struct floating_decimal_64 {
   uint64_t mantissa;
+  // Decimal exponent's range is -324 to 308
+  // inclusive, and can fit in a short if needed.
   int32_t exponent;
 } floating_decimal_64;
 

diff --git a/ryu/f2s.c b/ryu/f2s.c
@@ -133,6 +133,8 @@ static inline uint32_t mulPow5divPow2(const uint32_t m, const uint32_t i, const
 // A floating decimal representing m * 10^e.
 typedef struct floating_decimal_32 {
   uint32_t mantissa;
+  // Decimal exponent's range is -45 to 38
+  // inclusive, and can fit in a short if needed.
   int32_t exponent;
 } floating_decimal_32;