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/**
* Copyright 2013 JogAmp Community. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are
* permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* The views and conclusions contained in the software and documentation are those of the
* authors and should not be interpreted as representing official policies, either expressed
* or implied, of JogAmp Community.
*/
package jogamp.common.os.elf;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
class IOUtils {
static final long MAX_INT_VALUE = ( (long) Integer.MAX_VALUE & 0xffffffffL ) ;
static String toHexString(int i) { return "0x"+Integer.toHexString(i); }
static String toHexString(long i) { return "0x"+Long.toHexString(i); }
static int shortToInt(short s) {
return (int)s & 0x0000ffff;
}
static int long2Int(final long v) {
if( MAX_INT_VALUE < v ) {
throw new IllegalArgumentException("Read uint32 value "+toHexString(v)+" > int32-max "+toHexString(MAX_INT_VALUE));
}
return (int)v;
}
static void checkBounds(final byte[] sb, final int offset, final int remaining) {
if( offset + remaining > sb.length ) {
throw new IndexOutOfBoundsException("Buffer of size "+sb.length+" cannot hold offset "+offset+" + remaining "+remaining);
}
}
static void readBytes(final RandomAccessFile in, final byte[] out, final int offset, final int len)
throws IOException, IllegalArgumentException
{
in.readFully(out, offset, len);
}
static void seek(final RandomAccessFile in, long newPos) throws IOException {
in.seek(newPos);
}
static int readUInt32(final byte[] in, final int offset) {
final int v = readInt32(in, offset);
if( 0 > v ) {
throw new IllegalArgumentException("Read uint32 value "+toHexString(v)+" > int32-max "+toHexString(MAX_INT_VALUE));
}
return v;
/** Need to fix endian for below path ..
checkBounds(in, offset, 4);
final byte[] uint = new byte[] { 0, 0, 0, 0, in[offset+0], in[offset+1], in[offset+2], in[offset+3] };
final ByteBuffer b = ByteBuffer.wrap(uint, 0, 8).order(ByteOrder.nativeOrder());
return b.asLongBuffer().get(0); */
}
static int readInt32(final byte[] in, final int offset) {
checkBounds(in, offset, 4);
final ByteBuffer b = ByteBuffer.wrap(in, offset, 4).order(ByteOrder.nativeOrder());
return b.asIntBuffer().get(0);
}
/**
* @param sb byte source buffer to parse
* @param offset offset within byte source buffer to start parsing
* @param remaining remaining numbers of bytes to parse beginning w/ <code>sb_off</code>,
* which shall not exceed <code>sb.length - offset</code>.
* @param offset_post optional integer array holding offset post parsing
* @return the parsed string
* @throws IndexOutOfBoundsException if <code>offset + remaining > sb.length</code>.
*/
static String getString(final byte[] sb, final int offset, final int remaining, int[] offset_post) throws IndexOutOfBoundsException {
checkBounds(sb, offset, remaining);
int strlen = 0;
for(; strlen < remaining && sb[strlen + offset] != 0; strlen++) { }
final String s = 0 < strlen ? new String(sb, offset, strlen) : "" ;
if( null != offset_post ) {
offset_post[0] = offset + strlen + 1; // incl. EOS
}
return s;
}
/**
* @param sb byte source buffer to parse
* @param offset offset within byte source buffer to start parsing
* @param remaining remaining numbers of bytes to parse beginning w/ <code>sb_off</code>,
* which shall not exceed <code>sb.length - offset</code>.
* @return the number of parsed strings
* @throws IndexOutOfBoundsException if <code>offset + remaining > sb.length</code>.
*/
static int getStringCount(final byte[] sb, int offset, final int remaining) throws IndexOutOfBoundsException {
checkBounds(sb, offset, remaining);
int strnum=0;
for(int i=0; i < remaining; i++) {
for(; i < remaining && sb[i + offset] != 0; i++) { }
strnum++;
}
return strnum;
}
/**
* @param sb byte source buffer to parse
* @param offset offset within byte source buffer to start parsing
* @param remaining remaining numbers of bytes to parse beginning w/ <code>sb_off</code>,
* which shall not exceed <code>sb.length - offset</code>.
* @return the parsed strings
* @throws IndexOutOfBoundsException if <code>offset + remaining > sb.length</code>.
*/
public static String[] getStrings(final byte[] sb, int offset, final int remaining) throws IndexOutOfBoundsException {
final int strnum = getStringCount(sb, offset, remaining);
// System.err.println("XXX: strnum "+strnum+", sb_off "+sb_off+", sb_len "+sb_len);
final String[] sa = new String[strnum];
final int[] io_off = new int[] { offset };
for(int i=0; i < strnum; i++) {
// System.err.print("XXX: str["+i+"] ["+io_off[0]);
sa[i] = getString(sb, io_off[0], remaining - io_off[0], io_off);
// System.err.println(".. "+io_off[0]+"[ "+sa[i]);
}
return sa;
}
}
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