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ASM: a very small and fast Java bytecode manipulation framework Copyright (c) 2000-2011 INRIA, France Telecom 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. 3. Neither the name of the copyright holders nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 THE COPYRIGHT OWNER 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.
 
 package com.sleepycat.asm;

Information about an exception handler block.

Author(s):
Eric Bruneton
 
 class Handler {

    
Beginning of the exception handler's scope (inclusive).
 
     Label start;

    
End of the exception handler's scope (exclusive).
 
     Label end;

    
Beginning of the exception handler's code.
 
     Label handler;

    
Internal name of the type of exceptions handled by this handler, or null to catch any exceptions.
 
     String desc;

    
Constant pool index of the internal name of the type of exceptions handled by this handler, or 0 to catch any exceptions.
 
     int type;

    
Next exception handler block info.
 
     Handler next;

    
Removes the range between start and end from the given exception handlers.

Parameters:
h an exception handler list.
start the start of the range to be removed.
end the end of the range to be removed. Maybe null.
Returns:
the exception handler list with the start-end range removed.
 
     static Handler remove(Handler hLabel startLabel end) {
         if (h == null) {
             return null;
         } else {
             h.next = remove(h.nextstartend);
         }
         int hstart = h.start.position;
         int hend = h.end.position;
         int s = start.position;
         int e = end == null ? . : end.position;
         // if [hstart,hend[ and [s,e[ intervals intersect...
         if (s < hend && e > hstart) {
             if (s <= hstart) {
                 if (e >= hend) {
                     // [hstart,hend[ fully included in [s,e[, h removed
                     h = h.next;
                 } else {
                     // [hstart,hend[ minus [s,e[ = [e,hend[
                     h.start = end;
                 }
            } else if (e >= hend) {
                // [hstart,hend[ minus [s,e[ = [hstart,s[
                h.end = start;
            } else {
                // [hstart,hend[ minus [s,e[ = [hstart,s[ + [e,hend[
                Handler g = new Handler();
                g.start = end;
                g.end = h.end;
                g.handler = h.handler;
                g.desc = h.desc;
                g.type = h.type;
                g.next = h.next;
                h.end = start;
                h.next = g;
            }
        }
        return h;
    }
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