content: /*
   * [The "BSD licence"]
   * Copyright (c) 2010 Ben Gruver (JesusFreke)
   * 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. The name of the author may not be used to endorse or promote products
   *    derived from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.taobao.android.baksmali.adaptors;
  
  import org.jf.baksmali.BaksmaliOptions;
  import org.jf.util.IndentingWriter;
  
  import java.io.IOException;
  
  import javax.annotation.Nonnull;
  
  /**
   * This class contains the logic used for formatting registers
   */
  public class RegisterFormatter {
      @Nonnull public final BaksmaliOptions options;
      public final int registerCount;
      public final int parameterRegisterCount;
  
      public RegisterFormatter(@Nonnull BaksmaliOptions options, int registerCount, int parameterRegisterCount) {
          this.options = options;
          this.registerCount = registerCount;
          this.parameterRegisterCount = parameterRegisterCount;
      }
  
      /**
       * Write out the register range value used by Format3rc. If baksmali.noParameterRegisters is true, it will always
       * output the registers in the v<n> format. But if false, then it will check if *both* registers are parameter
       * registers, and if so, use the p<n> format for both. If only the last register is a parameter register, it will
       * use the v<n> format for both, otherwise it would be confusing to have something like {v20 .. p1}
       * @param writer the <code>IndentingWriter</code> to write to
       * @param startRegister the first register in the range
       * @param lastRegister the last register in the range
       */
      public void writeRegisterRange(IndentingWriter writer, int startRegister, int lastRegister) throws IOException {
          if (!options.parameterRegisters) {
              assert startRegister <= lastRegister;
  
              if (startRegister >= registerCount - parameterRegisterCount) {
                  writer.write("{p");
                  writer.printSignedIntAsDec(startRegister - (registerCount - parameterRegisterCount));
                  writer.write(" .. p");
                  writer.printSignedIntAsDec(lastRegister - (registerCount - parameterRegisterCount));
                  writer.write('}');
                  return;
              }
          }
          writer.write("{v");
          writer.printSignedIntAsDec(startRegister);
          writer.write(" .. v");
          writer.printSignedIntAsDec(lastRegister);
          writer.write('}');
      }
  
      /**
       * Writes a register with the appropriate format. If baksmali.noParameterRegisters is true, then it will always
       * output a register in the v<n> format. If false, then it determines if the register is a parameter register,
       * and if so, formats it in the p<n> format instead.
       *
       * @param writer the <code>IndentingWriter</code> to write to
       * @param register the register number
       */
      public void writeTo(IndentingWriter writer, int register) throws IOException {
          if (!options.parameterRegisters) {
              if (register >= registerCount - parameterRegisterCount) {
                  writer.write('p');
                  writer.printSignedIntAsDec((register - (registerCount - parameterRegisterCount)));
                  return;
              }
          }
          writer.write('v');
          writer.printSignedIntAsDec(register);
      }
  }
  