Add scientific notation support to Decimal::setDecimal

rtl/nbcd/nbcd.cpp

@@ -951,7 +951,13 @@ void Decimal::setReal(double value)
 void Decimal::setString(size32_t length, const char * buffer)
 {
     const char * limit = buffer+length;
-    const char * cur = buffer;
+    const char * cur = limit;
+    int sciNotation = 0;
+    while ((cur > buffer) && (*cur != 'E'))
+        cur--;
+    if (cur != buffer)
+        sciNotation = atoi(std::string(cur+1, limit).c_str());
+    cur = buffer;
     while ((cur < limit) && (*cur == ' '))
         cur++;
 
@@ -975,8 +981,8 @@ void Decimal::setString(size32_t length, const char * buffer)
 
     int idx;
     for (idx = 0; idx < (int)numDigits; idx++)
-        digits[zeroDigit+idx] = cur[-(idx+1)] - '0'; // careful - if idx is unsigned, -(idx+1) is not sign-extended and fails if int size is not pointer size
-    msb = zeroDigit+(numDigits-1);
+        digits[zeroDigit+idx+sciNotation] = cur[-(idx+1)] - '0'; // careful - if idx is unsigned, -(idx+1) is not sign-extended and fails if int size is not pointer size
+    msb = zeroDigit+(numDigits-1)+sciNotation;
 
     if ((cur < limit) && (*cur == '.'))
     {
@@ -985,13 +991,13 @@ void Decimal::setString(size32_t length, const char * buffer)
         const char * start = cur;
         if (limit-cur > maxPrecision)
             limit = cur + maxPrecision;
-        byte * digit = digits + zeroDigit;
+        byte * digit = digits + zeroDigit + sciNotation;
         while ((cur < limit) && (isdigit(*cur)))
             *--digit = *cur++ - '0';
-        lsb = zeroDigit - (cur-start);
+        lsb = zeroDigit - (cur-start) + sciNotation;
     }
     else
-        lsb = zeroDigit;
+        lsb = zeroDigit + sciNotation;
 }