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/*
* Copyright 1999 Phil Burk, Mobileer Inc
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.jsyn.util;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Formatted numeric output. Convert integers and floats to strings based on field widths and
* desired decimal places.
*
* @author Phil Burk (C) 1999 SoftSynth.com
*/
public class NumericOutput {
private static final Logger LOGGER = LoggerFactory.getLogger(NumericOutput.class);
static char digitToChar(int digit) {
if (digit > 9) {
return (char) ('A' + digit - 10);
} else {
return (char) ('0' + digit);
}
}
public static String integerToString(int n, int width, boolean leadingZeros) {
return integerToString(n, width, leadingZeros, 10);
}
public static String integerToString(int n, int width) {
return integerToString(n, width, false, 10);
}
public static String integerToString(int n, int width, boolean leadingZeros, int radix) {
if (width > 32)
width = 32;
StringBuffer buf = new StringBuffer();
long ln = n;
boolean ifNeg = false;
// only do sign if decimal
if (radix != 10) {
// LOGGER.debug("MASK before : ln = " + ln );
ln = ln & 0x00000000FFFFFFFFL;
// LOGGER.debug("MASK after : ln = " + ln );
} else if (ln < 0) {
ifNeg = true;
ln = -ln;
}
if (ln == 0) {
buf.append('0');
} else {
// LOGGER.debug(" ln = " + ln );
while (ln > 0) {
int rem = (int) (ln % radix);
buf.append(digitToChar(rem));
ln = ln / radix;
}
}
if (leadingZeros) {
int pl = width;
if (ifNeg)
pl -= 1;
for (int i = buf.length(); i < pl; i++)
buf.append('0');
}
if (ifNeg)
buf.append('-');
// leading spaces
for (int i = buf.length(); i < width; i++)
buf.append(' ');
// reverse buffer to put characters in correct order
buf.reverse();
return buf.toString();
}
/**
* Convert double to string.
*
* @param width = minimum width of formatted string
* @param places = number of digits displayed after decimal point
*/
public static String doubleToString(double value, int width, int places) {
return doubleToString(value, width, places, false);
}
/**
* Convert double to string.
*
* @param width = minimum width of formatted string
* @param places = number of digits displayed after decimal point
*/
public static String doubleToString(double value, int width, int places, boolean leadingZeros) {
if (width > 32)
width = 32;
if (places > 16)
places = 16;
boolean ifNeg = false;
if (value < 0.0) {
ifNeg = true;
value = -value;
}
// round at relevant decimal place
value += 0.5 * Math.pow(10.0, 0 - places);
int ival = (int) Math.floor(value);
// get portion after decimal point as an integer
int fval = (int) ((value - Math.floor(value)) * Math.pow(10.0, places));
String result = "";
result += integerToString(ival, 0, false, 10);
result += ".";
result += integerToString(fval, places, true, 10);
if (leadingZeros) {
// prepend leading zeros and {-}
int zw = width;
if (ifNeg)
zw -= 1;
while (result.length() < zw)
result = "0" + result;
if (ifNeg)
result = "-" + result;
} else {
// prepend {-} and leading spaces
if (ifNeg)
result = "-" + result;
while (result.length() < width)
result = " " + result;
}
return result;
}
static void testInteger(int n) {
LOGGER.debug("Test " + n + ", 0x" + Integer.toHexString(n) + ", %"
+ Integer.toBinaryString(n));
LOGGER.debug(" +,8,t,10 = " + integerToString(n, 8, true, 10));
LOGGER.debug(" +,8,f,10 = " + integerToString(n, 8, false, 10));
LOGGER.debug(" -,8,t,10 = " + integerToString(-n, 8, true, 10));
LOGGER.debug(" -,8,f,10 = " + integerToString(-n, 8, false, 10));
LOGGER.debug(" +,8,t,16 = " + integerToString(n, 8, true, 16));
LOGGER.debug(" +,8,f,16 = " + integerToString(n, 8, false, 16));
LOGGER.debug(" -,8,t,16 = " + integerToString(-n, 8, true, 16));
LOGGER.debug(" -,8,f,16 = " + integerToString(-n, 8, false, 16));
LOGGER.debug(" +,8,t, 2 = " + integerToString(n, 8, true, 2));
LOGGER.debug(" +,8,f, 2 = " + integerToString(n, 8, false, 2));
}
static void testDouble(double value) {
LOGGER.debug("Test " + value);
LOGGER.debug(" +,5,1 = " + doubleToString(value, 5, 1));
LOGGER.debug(" -,5,1 = " + doubleToString(-value, 5, 1));
LOGGER.debug(" +,14,3 = " + doubleToString(value, 14, 3));
LOGGER.debug(" -,14,3 = " + doubleToString(-value, 14, 3));
LOGGER.debug(" +,6,2,true = " + doubleToString(value, 6, 2, true));
LOGGER.debug(" -,6,2,true = " + doubleToString(-value, 6, 2, true));
}
public static void main(String argv[]) {
LOGGER.debug("Test NumericOutput");
testInteger(0);
testInteger(1);
testInteger(16);
testInteger(23456);
testInteger(0x23456);
testInteger(0x89ABC);
testDouble(0.0);
testDouble(0.0678);
testDouble(0.1234567);
testDouble(1.234567);
testDouble(12.34567);
testDouble(123.4567);
testDouble(1234.5678);
}
}
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