forked from pquiring/javaforce
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathLE.java
More file actions
executable file
·194 lines (176 loc) · 5.01 KB
/
Copy pathLE.java
File metadata and controls
executable file
·194 lines (176 loc) · 5.01 KB
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
189
190
191
192
193
194
package javaforce;
/**
* Little Endian get/set functions.
*
* Usage : Windows files, Intel CPU style, etc.
*
* Could use java.nio.ByteBuffer but sometimes this is faster.
*
* Created : Dec 5, 2013
*/
public class LE {
public static int getuint8(byte[] data, int offset) {
int ret;
ret = (int)data[offset] & 0xff;
return ret;
}
public static int getuint16(byte[] data, int offset) {
int ret;
ret = data[offset] & 0xff;
ret += (data[offset+1] & 0xff) << 8;
return ret;
}
public static int getuint32(byte[] data, int offset) {
int ret;
ret = (int)data[offset] & 0xff;
ret += ((int)data[offset+1] & 0xff) << 8;
ret += ((int)data[offset+2] & 0xff) << 16;
ret += ((int)data[offset+3] & 0xff) << 24;
return ret;
}
public static float getfloat(byte[] data, int offset) {
return Float.intBitsToFloat(getuint32(data, offset));
}
public static long getuint64(byte[] data, int offset) {
long ret;
ret = (long)data[offset] & 0xff;
ret += ((long)data[offset+1] & 0xff) << 8;
ret += ((long)data[offset+2] & 0xff) << 16;
ret += ((long)data[offset+3] & 0xff) << 24;
ret += ((long)data[offset+4] & 0xff) << 32;
ret += ((long)data[offset+5] & 0xff) << 40;
ret += ((long)data[offset+6] & 0xff) << 48;
ret += ((long)data[offset+7] & 0xff) << 56;
return ret;
}
public static double getdouble(byte[] data, int offset) {
return Double.longBitsToDouble(getuint64(data, offset));
}
public static String getString(byte[] data, int offset, int len) {
String ret = "";
while (len > 0) {
if (data[offset]==0) break;
ret += (char)data[offset++];
len--;
}
return ret;
}
public static void setuint8(byte[] data, int offset, int num) {
data[offset] = (byte)(num & 0xff);
}
public static void setuint16(byte[] data, int offset, int num) {
data[offset+0] = (byte)(num & 0xff);
num >>= 8;
data[offset+1] = (byte)(num & 0xff);
}
public static void setuint32(byte[] data, int offset, int num) {
data[offset+0] = (byte)(num & 0xff);
num >>= 8;
data[offset+1] = (byte)(num & 0xff);
num >>= 8;
data[offset+2] = (byte)(num & 0xff);
num >>= 8;
data[offset+3] = (byte)(num & 0xff);
}
public static void setfloat(byte[] data, int offset, float num) {
setuint32(data, offset, Float.floatToIntBits(num));
}
public static void setuint64(byte[] data, int offset, long num) {
data[offset+0] = (byte)(num & 0xff);
num >>= 8;
data[offset+1] = (byte)(num & 0xff);
num >>= 8;
data[offset+2] = (byte)(num & 0xff);
num >>= 8;
data[offset+3] = (byte)(num & 0xff);
num >>= 8;
data[offset+4] = (byte)(num & 0xff);
num >>= 8;
data[offset+5] = (byte)(num & 0xff);
num >>= 8;
data[offset+6] = (byte)(num & 0xff);
num >>= 8;
data[offset+7] = (byte)(num & 0xff);
}
public static void setdouble(byte[] data, int offset, double num) {
setuint64(data, offset, Double.doubleToLongBits(num));
}
public static void setString(byte[] data, int offset, int len, String str) {
int pos = 0;
while (len > 0) {
if (pos >= str.length()) {
data[offset++] = 0;
} else {
data[offset++] = (byte)str.charAt(pos++);
}
len--;
}
}
//Using arrays are 40% faster than using java.nio.ByteBuffer
public static short[] byteArray2shortArray(byte in[], short out[]) {
int len = in.length / 2;
if (out == null) out = new short[len];
int p = 0;
short val;
for (int a = 0; a < len; a++) {
val = (short)(in[p++] & 0xff);
val += (in[p++] & 0xff) << 8;
out[a] = val;
}
return out;
}
public static int[] byteArray2intArray(byte in[], int out[]) {
int len = in.length / 4;
if (out == null) out = new int[len];
int p = 0;
int val;
for (int a = 0; a < len; a++) {
val = (in[p++] & 0xff);
val += (in[p++] & 0xff) << 8;
val += (in[p++] & 0xff) << 16;
val += (in[p++] & 0xff) << 24;
out[a] = val;
}
return out;
}
public static byte[] shortArray2byteArray(short in[], byte out[]) {
int len = in.length;
if (out == null) out = new byte[len * 2];
int p = 0;
short val;
for (int a = 0; a < len; a++) {
val = in[a];
out[p++] = (byte) (val & 0xff);
out[p++] = (byte) (val >>> 8);
}
return out;
}
public static byte[] intArray2byteArray(int in[], byte out[]) {
int len = in.length;
if (out == null) out = new byte[len * 4];
int p = 0;
int val;
for (int a = 0; a < len; a++) {
val = in[a];
out[p++] = (byte) (val & 0xff);
val >>>= 8;
out[p++] = (byte) (val & 0xff);
val >>>= 8;
out[p++] = (byte) (val & 0xff);
out[p++] = (byte) (val >>> 8);
}
return out;
}
public static short[] swap(short[] input) {
int t1, t2;
for(int a=0;a<input.length;a++) {
t1 = input[a] & 0xffff;
t2 = t1;
t1 <<= 8;
t1 &= 0xff00;
t2 >>= 8;
input[a] = (short)(t1 | t2);
}
return input;
}
}