1 files changed, 104 insertions, 0 deletions
diff --git a/src/modules/json/NumberToString.h b/src/modules/json/NumberToString.h
new file mode 100644
index 0000000000..a5e93d4302
--- /dev/null
+++ b/src/modules/json/NumberToString.h
@@ -0,0 +1,104 @@
+#ifndef NUMBERTOSTRING_H
+#define NUMBERTOSTRING_H
+
+#include "JSONDebug.h"
+#include "JSONMemory.h"
+#include <cstdio>
+
+static unsigned int getlen(unsigned int size){
+    switch (size){
+	   case 1:
+		  return 5;   //3 digits for the number, plus null terminator and negation
+	   case 2:
+		  return 7;   //5 digits for the number, plus null terminator and negation
+	   case 4:
+		  return 12;  //10 digits for the number, plus null terminator and negation
+	   case 8:
+		  return 22;  //20 digits for the number, plus null terminator and negation
+    }
+    JSON_ASSERT(size == 16, JSON_TEXT("template is not recognized 2^x in size"));
+    return 41;  //39 digits for the number, plus null terminator and negation
+}
+
+class NumberToString {
+public:
+    template<typename T>
+    static json_string _itoa(T val, unsigned int size){
+	   long value = (long)val;
+	   const unsigned int digits = getlen(size);
+	   json_auto<json_char> result(digits);
+	   result.ptr[digits - 1] = JSON_TEXT('\0'); //null terminator
+	   json_char * runner = &result.ptr[digits - 2];
+	   bool negative;
+	   
+	   //first thing, check if it's negative, if so, make it positive
+	   if (value < 0){
+		  value = -value;
+		  negative = true;
+	   } else {
+		  negative = false;
+	   }
+	   
+	   //create the string
+	   do {
+		  *runner-- = (json_char)(value % 10) + JSON_TEXT('0');
+	   } while(value /= 10);
+	   
+	   //if it's negative, add the negation
+	   json_string res;
+	   if (negative){
+		  *runner = JSON_TEXT('-');
+		  res = runner;
+	   } else {
+		  res = runner + 1;
+	   }
+	   return res;   
+    }
+    
+    #ifndef JSON_LIBRARY
+	   template<typename T>
+	   static json_string _uitoa(T val, unsigned int size){
+		  unsigned long value = val;
+		  const unsigned int digits = getlen(size) - 1;  //minus one because no '-' char
+		  json_auto<json_char> result(digits);
+		  result.ptr[digits - 1] = JSON_TEXT('\0'); //null terminator
+		  json_char * runner = &result.ptr[digits - 2];
+		  
+		  //create the string
+		  do {
+			 *runner-- = (json_char)(value % 10) + JSON_TEXT('0');
+		  } while(value /= 10);
+		  
+		  json_string res = runner + 1;
+		  return res;   
+	   }
+    #endif
+    
+    template<typename T>
+    static json_string _ftoa(T value){
+	   json_char result[64];
+	   #ifdef JSON_UNICODE
+		  swprintf(result, 63, L"%f", value); 
+	   #else
+		  snprintf(result, 63, "%f", value); 
+	   #endif
+	   //strip the trailing zeros
+	   for(json_char * pos = &result[0]; *pos; ++pos){
+		  if (*pos == '.') {  //only care about after the decimal
+			 for(json_char * runner = pos + 1; *runner; ++runner){
+				if (*runner != JSON_TEXT('0')) pos = runner + 1;
+			 }
+			 *pos = JSON_TEXT('\0');
+			 break;
+		  }
+	   }
+	   return result;    
+    }
+    
+    static inline bool areEqual(const json_number & one, const json_number & two){
+	   const json_number temp = one - two;
+	   return (temp > 0.0) ? temp < 0.00001 : temp > -0.00001;   
+    }
+};
+
+#endif