share nchars impl

git-svn-id: https://svn.code.sf.net/p/jackcess/code/jackcess/trunk@1223 f203690c-595d-4dc9-a70b-905162fa7fd2

src/main/java/com/healthmarketscience/jackcess/impl/expr/DefaultFunctions.java

@@ -551,13 +551,13 @@ public class DefaultFunctions
 
     if(groupDigits) {
       fmt.append("#,");
-      appendNum(fmt, '#', numGroupDigits - 1);
+      DefaultTextFunctions.nchars(fmt, numGroupDigits - 1, '#');
     }
     
     fmt.append(incLeadDigit ? "0" : "#");
     if(numDecDigits > 0) {
       fmt.append(".");
-      appendNum(fmt, '0', numDecDigits);
+      DefaultTextFunctions.nchars(fmt, numDecDigits, '0');
     }
 
     if(isPercent) {
@@ -597,10 +597,4 @@ public class DefaultFunctions
       throw new IllegalStateException("Duplicate function " + fname);
     }
   }
-
-  private static void appendNum(StringBuilder sb, char c, int num) {
-    for(int i = 0; i < num; ++i) {
-      sb.append(c);
-    }
-  }
 }

src/main/java/com/healthmarketscience/jackcess/impl/expr/DefaultTextFunctions.java

@@ -428,12 +428,16 @@ public class DefaultTextFunctions
 
   private static String nchars(int num, char c) {
     StringBuilder sb = new StringBuilder(num);
+    nchars(sb, num, c);
+    return sb.toString();
+  }
+
+  static void nchars(StringBuilder sb, int num, char c) {
     for(int i = 0; i < num; ++i) {
       sb.append(c);
     }
-    return sb.toString();
   }
-
+  
   private static String trim(String str, boolean doLeft, boolean doRight) {
     int start = 0;
     int end = str.length();