1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
|
/*
* 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;
/**
* 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 {
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) {
// System.out.println("MASK before : ln = " + ln );
ln = ln & 0x00000000FFFFFFFFL;
// System.out.println("MASK after : ln = " + ln );
} else if (ln < 0) {
ifNeg = true;
ln = -ln;
}
if (ln == 0) {
buf.append('0');
} else {
// System.out.println(" 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) {
System.out.println("Test " + n + ", 0x" + Integer.toHexString(n) + ", %"
+ Integer.toBinaryString(n));
System.out.println(" +,8,t,10 = " + integerToString(n, 8, true, 10));
System.out.println(" +,8,f,10 = " + integerToString(n, 8, false, 10));
System.out.println(" -,8,t,10 = " + integerToString(-n, 8, true, 10));
System.out.println(" -,8,f,10 = " + integerToString(-n, 8, false, 10));
System.out.println(" +,8,t,16 = " + integerToString(n, 8, true, 16));
System.out.println(" +,8,f,16 = " + integerToString(n, 8, false, 16));
System.out.println(" -,8,t,16 = " + integerToString(-n, 8, true, 16));
System.out.println(" -,8,f,16 = " + integerToString(-n, 8, false, 16));
System.out.println(" +,8,t, 2 = " + integerToString(n, 8, true, 2));
System.out.println(" +,8,f, 2 = " + integerToString(n, 8, false, 2));
}
static void testDouble(double value) {
System.out.println("Test " + value);
System.out.println(" +,5,1 = " + doubleToString(value, 5, 1));
System.out.println(" -,5,1 = " + doubleToString(-value, 5, 1));
System.out.println(" +,14,3 = " + doubleToString(value, 14, 3));
System.out.println(" -,14,3 = " + doubleToString(-value, 14, 3));
System.out.println(" +,6,2,true = " + doubleToString(value, 6, 2, true));
System.out.println(" -,6,2,true = " + doubleToString(-value, 6, 2, true));
}
public static void main(String argv[]) {
System.out.println("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);
}
}
|
