Examples of org.tmatesoft.svn.core.io.diff.SVNDiffInstruction

org.tmatesoft.svn.core.io.diff.SVNDiffInstruction
The SVNDiffInstruction class represents instructions used as delta applying rules.
For now there are three types of copy instructions:
- {@link SVNDiffInstruction#COPY_FROM_SOURCE}: that is when bytes are copied from a source view (for example, existing revision of a file) to the target one.
- {@link SVNDiffInstruction#COPY_FROM_NEW_DATA}: new data bytes (e.g. new text) are copied to the target view.
- {@link SVNDiffInstruction#COPY_FROM_TARGET}: that is, when a sequence of bytes in the target must be repeated.
These are three different ways how full text representation bytes are obtained. @version 1.3 @author TMate Software Ltd. @since 1.2

    private SVNDiffInstruction myInstructionTemplate;
    
    public SVNDeltaCombiner() {
        myRangeTree = new SVNRangeTree();
        myWindowInstructions = new SVNDiffInstruction[10];
        myInstructionTemplate = new SVNDiffInstruction(0,0,0);
        myOffsetsIndex = new SVNOffsetsIndex();
        
        myNextWindowData = ByteBuffer.allocate(2048);
    }

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        SVNRangeTree rangeIndexTree = myRangeTree;
        rangeIndexTree.dispose();
    
        for(Iterator instructions = myWindow.instructions(true); instructions.hasNext();) {
            SVNDiffInstruction instruction = (SVNDiffInstruction) instructions.next();
            if (instruction.type != SVNDiffInstruction.COPY_FROM_SOURCE) {
                myNextWindowInstructions = ensureBufferSize(myNextWindowInstructions, 10);
                instruction.writeTo(myNextWindowInstructions);
                if (instruction.type == SVNDiffInstruction.COPY_FROM_NEW_DATA) {
                    myNextWindowData = ensureBufferSize(myNextWindowData, instruction.length);
                    myWindow.writeNewData(myNextWindowData, instruction.offset, instruction.length);
                }
            } else {

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    private void copySourceInstructions(int offset, int limit, int targetOffset, SVNDiffWindow window, SVNDiffInstruction[] windowInsructions) {
        int firstInstuctionIndex = findInstructionIndex(myOffsetsIndex, offset);
        int lastInstuctionIndex = findInstructionIndex(myOffsetsIndex, limit - 1);
        
        for(int i = firstInstuctionIndex; i <= lastInstuctionIndex; i++) {
            SVNDiffInstruction instruction = windowInsructions[i];
            int off0 = myOffsetsIndex.offsets[i];
            int off1 = myOffsetsIndex.offsets[i + 1];
            
            int fix_offset = offset > off0 ? offset - off0 : 0;
            int fix_limit = off1 > limit ? off1 - limit : 0;
            SVNDebugLog.assertCondition(SVNLogType.DEFAULT, fix_offset + fix_limit < instruction.length, 
                    "assert #7");
            
            if (instruction.type != SVNDiffInstruction.COPY_FROM_TARGET) {
                int oldOffset = instruction.offset;
                int oldLength = instruction.length;
                
                instruction.offset += fix_offset;
                instruction.length = oldLength - fix_offset - fix_limit; 
                
                myNextWindowInstructions = ensureBufferSize(myNextWindowInstructions, 10);
                instruction.writeTo(myNextWindowInstructions);
                if (instruction.type == SVNDiffInstruction.COPY_FROM_NEW_DATA) {
                    myNextWindowData = ensureBufferSize(myNextWindowData, instruction.length);
                    window.writeNewData(myNextWindowData, instruction.offset, instruction.length);
                }
                instruction.offset = oldOffset;

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            myOffsetsIndex = new SVNOffsetsIndex();
        }
        myOffsetsIndex.clear();
        int offset = 0;
        for (int i = 0; i < length; i++) {
            SVNDiffInstruction instruction = instructions[i];
            myOffsetsIndex.addOffset(offset);
            offset += instruction.length;
        }
        myOffsetsIndex.addOffset(offset);
    }

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    private SVNDiffInstruction myTemplateInstruction;
    
    public SVNDeltaAlgorithm() {
        myNewData = ByteBuffer.allocate(1024);
        myData = ByteBuffer.allocate(2048);
        myTemplateInstruction = new SVNDiffInstruction(0,0,0);
    }

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Related Classes of org.tmatesoft.svn.core.io.diff.SVNDiffInstruction

org.tmatesoft.svn.core.internal.delta.SVNDeltaAlgorithm

org.tmatesoft.svn.core.internal.delta.SVNDeltaCombiner

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