Source Code Cross Referenced for F64Vector.java in  » Scripting » Kawa » gnu » lists » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Scripting » Kawa » gnu.lists 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        // Copyright (c) 2001, 2002, 2003  Per M.A. Bothner and Brainfood Inc.
002:        // This is free software;  for terms and warranty disclaimer see ./COPYING.
003:
004:        package gnu.lists;
005:
006:        import java.io.*;
007:
008:        /** Simple adjustable-length vector whose elements are 64-bit floats. */
009:
010:        public class F64Vector extends SimpleVector implements  Externalizable
011:        /* #ifdef JAVA2 */
012:        , Comparable
013:        /* #endif */
014:        {
015:            double[] data;
016:            protected static double[] empty = new double[0];
017:
018:            public F64Vector() {
019:                data = empty;
020:            }
021:
022:            public F64Vector(int size, double value) {
023:                double[] array = new double[size];
024:                data = array;
025:                this .size = size;
026:                while (--size >= 0)
027:                    array[size] = value;
028:            }
029:
030:            public F64Vector(int size) {
031:                this .data = new double[size];
032:                this .size = size;
033:            }
034:
035:            public F64Vector(double[] data) {
036:                this .data = data;
037:                size = data.length;
038:            }
039:
040:            public F64Vector(Sequence seq) {
041:                data = new double[seq.size()];
042:                addAll(seq);
043:            }
044:
045:            /** Get the allocated length of the data buffer. */
046:            public int getBufferLength() {
047:                return data.length;
048:            }
049:
050:            public void setBufferLength(int length) {
051:                int oldLength = data.length;
052:                if (oldLength != length) {
053:                    double[] tmp = new double[length];
054:                    System.arraycopy(data, 0, tmp, 0,
055:                            oldLength < length ? oldLength : length);
056:                    data = tmp;
057:                }
058:            }
059:
060:            protected Object getBuffer() {
061:                return data;
062:            }
063:
064:            public final double doubleAt(int index) {
065:                if (index >= size)
066:                    throw new ArrayIndexOutOfBoundsException();
067:                return data[index];
068:            }
069:
070:            public final double doubleAtBuffer(int index) {
071:                return data[index];
072:            }
073:
074:            public final Object get(int index) {
075:                if (index > size)
076:                    throw new IndexOutOfBoundsException();
077:                return Convert.toObject(data[index]);
078:            }
079:
080:            public final Object getBuffer(int index) {
081:                return Convert.toObject(data[index]);
082:            }
083:
084:            public final int intAtBuffer(int index) {
085:                return (int) data[index];
086:            }
087:
088:            public final void setDoubleAt(int index, double value) {
089:                if (index > size)
090:                    throw new IndexOutOfBoundsException();
091:                data[index] = value;
092:            }
093:
094:            public final void setDoubleAtBuffer(int index, double value) {
095:                data[index] = value;
096:            }
097:
098:            public final Object setBuffer(int index, Object value) {
099:                Object old = Convert.toObject(data[index]);
100:                data[index] = Convert.toDouble(value);
101:                return old;
102:            }
103:
104:            /*
105:            public final void setElementAt(Object value, int index)
106:            {
107:              data[index] = ((Number) value).doubleValue();
108:            }
109:             */
110:
111:            protected void clearBuffer(int start, int count) {
112:                while (--count >= 0)
113:                    data[start++] = 0;
114:            }
115:
116:            public int getElementKind() {
117:                return DOUBLE_VALUE;
118:            }
119:
120:            public String getTag() {
121:                return "f64";
122:            }
123:
124:            public boolean consumeNext(int ipos, Consumer out) {
125:                int index = ipos >>> 1;
126:                if (index >= size)
127:                    return false;
128:                out.writeDouble(data[index]);
129:                return true;
130:            }
131:
132:            public void consumePosRange(int iposStart, int iposEnd, Consumer out) {
133:                if (out.ignoring())
134:                    return;
135:                int i = iposStart >>> 1;
136:                int end = iposEnd >>> 1;
137:                for (; i < end; i++)
138:                    out.writeDouble(data[i]);
139:            }
140:
141:            /*
142:            public final void print(int index, java.io.PrintWriter ps)
143:            {
144:              ps.print(getDouble(index));
145:            }
146:             */
147:
148:            public int compareTo(Object obj) {
149:                F64Vector vec2 = (F64Vector) obj;
150:                double[] arr1 = data;
151:                double[] arr2 = vec2.data;
152:                int n1 = size;
153:                int n2 = vec2.size;
154:                int n = n1 > n2 ? n2 : n1;
155:                for (int i = 0; i < n; i++) {
156:                    double v1 = arr1[i];
157:                    double v2 = arr2[i];
158:                    if (v1 != v2)
159:                        return v1 > v2 ? 1 : -1;
160:                }
161:                return n1 - n2;
162:            }
163:
164:            /**
165:             * @serialData Write 'size' (using writeInt),
166:             *   followed by 'size' elements in order (using writeDouble).
167:             */
168:            public void writeExternal(ObjectOutput out) throws IOException {
169:                int size = this .size;
170:                out.writeInt(size);
171:                for (int i = 0; i < size; i++)
172:                    out.writeDouble(data[i]);
173:            }
174:
175:            public void readExternal(ObjectInput in) throws IOException,
176:                    ClassNotFoundException {
177:                int size = in.readInt();
178:                double[] data = new double[size];
179:                for (int i = 0; i < size; i++)
180:                    data[i] = in.readDouble();
181:                this.data = data;
182:                this.size = size;
183:            }
184:        }
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