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Refactoring.

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This commit is contained in:
nvt 2012-01-28 03:34:16 +01:00
parent 1e85183754
commit 4c75a250e6
10 changed files with 64 additions and 153 deletions
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108
tools/coffee-manager/se/sics/coffee/CoffeeHeader.java
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@ -26,10 +26,6 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
*
* $Id: CoffeeHeader.java,v 1.2 2009/08/10 12:51:52 nvt-se Exp $
*
* @author Nicolas Tsiftes
*
*/
@ -37,9 +33,8 @@
package se.sics.coffee;
class CoffeeHeader {
private CoffeeFS coffeeFS;
private CoffeeConfiguration conf;
private int page;
private final CoffeeConfiguration conf;
private final int page;
private static final int HDR_FLAG_VALID = 0x1;
private static final int HDR_FLAG_ALLOCATED = 0x2;
@ -54,36 +49,33 @@ class CoffeeHeader {
int maxPages;
String name;
private boolean valid;
private boolean allocated;
private boolean obsolete;
private boolean modified;
private boolean log;
private boolean isolated;
private int flags;
public CoffeeHeader(CoffeeFS coffeeFS, int page) {
this.coffeeFS = coffeeFS;
this.page = page;
conf = coffeeFS.getConfiguration();
}
public CoffeeHeader(CoffeeFS coffeeFS, int page, byte[] bytes) {
this.coffeeFS = coffeeFS;
this.page = page;
this(coffeeFS, page);
processRawHeader(bytes);
}
private int getInt(byte[] bytes, int index) {
return (bytes[index] & 0xff) + ((bytes[index + 1] & 0xff) << 8);
}
private void processRawHeader(byte[] bytes) {
int index = 0;
logPage = getPageValue(bytes, 0);
index += conf.pageTypeSize;
logRecords = bytes[index] + (bytes[index + 1] << 8);
logRecords = getInt(bytes, index);
index += 2;
logRecordSize = bytes[index] + (bytes[index + 1] << 8);
logRecordSize = getInt(bytes, index);
index += 2;
maxPages = getPageValue(bytes, index);
@ -91,64 +83,17 @@ class CoffeeHeader {
index++; // Skip deprecated EOF hint field.
processFlags((int)bytes[index]);
flags = bytes[index] & 0xff;
index++;
name = new String(bytes).substring(index,
index + conf.NAME_LENGTH);
index + conf.nameLength);
int nullCharOffset = name.indexOf(0);
if (nullCharOffset >= 0) {
name = name.substring(0, nullCharOffset);
}
}
private byte composeFlags() {
byte flags = 0;
if (valid) {
flags |= HDR_FLAG_VALID;
}
if (allocated) {
flags |= HDR_FLAG_ALLOCATED;
}
if (obsolete) {
flags |= HDR_FLAG_OBSOLETE;
}
if (modified) {
flags |= HDR_FLAG_MODIFIED;
}
if (log) {
flags |= HDR_FLAG_LOG;
}
if (isolated) {
flags |= HDR_FLAG_ISOLATED;
}
return flags;
}
private void processFlags(int flags) {
if ((flags & HDR_FLAG_VALID) != 0) {
valid = true;
}
if ((flags & HDR_FLAG_ALLOCATED) != 0) {
allocated = true;
}
if ((flags & HDR_FLAG_OBSOLETE) != 0) {
obsolete = true;
}
if ((flags & HDR_FLAG_MODIFIED) != 0) {
modified = true;
}
if ((flags & HDR_FLAG_LOG) != 0) {
log = true;
}
if ((flags & HDR_FLAG_ISOLATED) != 0) {
isolated = true;
}
}
private byte[] setPageValue(int page) {
byte[] bytes = new byte[conf.pageTypeSize];
@ -160,16 +105,15 @@ class CoffeeHeader {
private int getPageValue(byte[] bytes, int offset) {
int page = 0;
for (int i = 0; i < conf.pageTypeSize; i++) {
page |= bytes[offset + i] << (8 * i);
page |= (bytes[offset + i] & 0xff) << (8 * i);
}
return page;
}
public byte[] toRawHeader() {
byte[] bytes = new byte[2 * conf.pageTypeSize +
conf.NAME_LENGTH + 6];
conf.nameLength + 6];
int index = 0;
System.arraycopy(setPageValue(logPage), 0, bytes, 0,
@ -187,18 +131,18 @@ class CoffeeHeader {
index += conf.pageTypeSize;
bytes[index++] = 0; // Deprecated EOF hint field.
bytes[index++] = composeFlags();
bytes[index++] = (byte) flags;
byte[] nameBytes = name.getBytes();
int copyLength = nameBytes.length > conf.NAME_LENGTH ?
conf.NAME_LENGTH : nameBytes.length;
int copyLength = nameBytes.length > conf.nameLength ?
conf.nameLength : nameBytes.length;
System.arraycopy(nameBytes, 0, bytes, index, copyLength);
return bytes;
}
public int rawLength() {
return 2 * conf.pageTypeSize + conf.NAME_LENGTH + 6;
return 2 * conf.pageTypeSize + conf.nameLength + 6;
}
public int getPage() {
@ -206,27 +150,27 @@ class CoffeeHeader {
}
public boolean isValid() {
return valid;
return (flags & HDR_FLAG_VALID) != 0;
}
public boolean isAllocated() {
return allocated;
return (flags & HDR_FLAG_ALLOCATED) != 0;
}
public boolean isObsolete() {
return obsolete;
return (flags & HDR_FLAG_OBSOLETE) != 0;
}
public boolean isModified() {
return modified;
return (flags & HDR_FLAG_MODIFIED) != 0;
}
public boolean isIsolated() {
return isolated;
return (flags & HDR_FLAG_ISOLATED) != 0;
}
public boolean isLog() {
return log;
return (flags & HDR_FLAG_LOG) != 0;
}
public boolean isFree() {
@ -238,11 +182,11 @@ class CoffeeHeader {
}
public void allocate() {
allocated = true;
flags |= HDR_FLAG_ALLOCATED;
}
public void makeObsolete() {
obsolete = true;
flags |= HDR_FLAG_OBSOLETE;
}
public void setName(String name) {