Reduce code duplication

Author: mborland

extra/detail/decode_decimal128.py

@@ -2,6 +2,8 @@
 # Distributed under the Boost Software License, Version 1.0.
 # https://www.boost.org/LICENSE_1_0.txt
 
+from generate_string import generate_string
+
 def decode_decimal128(bits):
 
     bits_high = bits >> 64
@@ -41,17 +43,6 @@ def decode_decimal128(bits):
 
         exp -= 6176 # Bias Value
 
-        if significand == 0:
-            result = "0.0e+0"
-        else:
-            sig_str = str(significand)
-            n_digits = len(sig_str)
-            if n_digits == 1:
-                normalized_str = sig_str
-                total_exp = exp
-            else:
-                normalized_str = sig_str[0] + '.' + sig_str[1:]
-                total_exp = exp + n_digits - 1
-            result = f"{'-' if sign else ''}{normalized_str}e{total_exp:+}"
+        result = generate_string(significand, exp, sign)
 
     return result

extra/detail/decode_decimal32.py

@@ -2,6 +2,8 @@
 # Distributed under the Boost Software License, Version 1.0.
 # https://www.boost.org/LICENSE_1_0.txt
 
+from generate_string import generate_string
+
 def decode_decimal32(bits):
     sign = bits & 2147483648 != 0
     isnan = False
@@ -37,17 +39,6 @@ def decode_decimal32(bits):
 
         exp -= 101 # Bias Value
 
-        if significand == 0:
-            result = "0.0e+0"
-        else:
-            sig_str = str(significand)
-            n_digits = len(sig_str)
-            if n_digits == 1:
-                normalized_str = sig_str
-                total_exp = exp
-            else:
-                normalized_str = sig_str[0] + '.' + sig_str[1:]
-                total_exp = exp + n_digits - 1
-            result = f"{'-' if sign else ''}{normalized_str}e{total_exp:+}"
+        result = generate_string(significand, exp, sign)
 
     return result

extra/detail/decode_decimal64.py

@@ -2,6 +2,8 @@
 # Distributed under the Boost Software License, Version 1.0.
 # https://www.boost.org/LICENSE_1_0.txt
 
+from generate_string import generate_string
+
 def decode_decimal64(bits):
     sign = bits & 9223372036854775808 != 0
     isnan = False
@@ -36,17 +38,6 @@ def decode_decimal64(bits):
 
         exp -= 398 # Bias Value
 
-        if significand == 0:
-            result = "0.0e+0"
-        else:
-            sig_str = str(significand)
-            n_digits = len(sig_str)
-            if n_digits == 1:
-                normalized_str = sig_str
-                total_exp = exp
-            else:
-                normalized_str = sig_str[0] + '.' + sig_str[1:]
-                total_exp = exp + n_digits - 1
-            result = f"{'-' if sign else ''}{normalized_str}e{total_exp:+}"
+        result = generate_string(significand, exp, sign)
 
     return result

extra/detail/decode_fast_type.py

@@ -6,4 +6,4 @@
 
 def decode_fast_type(significand, exp, sign):
     return generate_string(significand, exp, sign)
-    
+