Removed ftoa NaN check

NaN check may not work with optimizing compilers. Use your implementation specific NaN check if necessary

1 files changed, 6 insertions, 11 deletions

diff --git a/printf.c b/printf.c
index fd29785..83c6d9e 100644
--- a/printf.c
+++ b/printf.c
@@ -214,7 +214,7 @@ static size_t _ntoa_long_long(char* buffer, unsigned long long value, bool negat
 static size_t _ftoa(double value, char* buffer, size_t maxlen, unsigned int prec, unsigned int width, unsigned int flags)

 {

   char buf[FTOA_BUFFER_SIZE];

-  size_t len = 0U;

+  size_t len  = 0U;

   double diff = 0.0;

 

   // if input is larger than thres_max, revert to exponential

@@ -223,10 +223,11 @@ static size_t _ftoa(double value, char* buffer, size_t maxlen, unsigned int prec
   // powers of 10

   static const double pow10[] = { 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 100000000, 1000000000 };

 

-  // test for NaN

-  if (!(value == value) && (maxlen > 2U)) {

-    buffer[0] = 'n'; buffer[1] = 'a'; buffer[2] = 'n';

-    return (size_t)3U;

+  // test for negative

+  bool negative = false;

+  if (value < 0) {

+    negative = true;

+    value = 0 - value;

   }

 

   // limit precision

@@ -238,12 +239,6 @@ static size_t _ftoa(double value, char* buffer, size_t maxlen, unsigned int prec
     prec = 9U;

   }

 

-  unsigned int negative = 0U;

-  if (value < 0) {

-    negative = 1U;

-    value = 0 - value;

-  }

-

   int whole = (int)value;

   double tmp = (value - whole) * pow10[prec];

   unsigned long frac = (unsigned long)tmp;