package soot.coffi;

/*-
 * #%L
 * Soot - a J*va Optimization Framework
 * %%
 * Copyright (C) 1997 Clark Verbrugge
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, either version 2.1 of the
 * License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Lesser Public License for more details.
 * 
 * You should have received a copy of the GNU General Lesser Public
 * License along with this program.  If not, see
 * <http://www.gnu.org/licenses/lgpl-2.1.html>.
 * #L%
 */

/**
 * There should be exactly one code attribute in every method; there may also be a code attribute associated with a field (as
 * an initializer).
 *
 * @see attribute_info
 * @see method_info#attributes
 * @see field_info#attributes
 * @see ClassFile@attributes
 * @author Clark Verbrugge
 */
class Code_attribute extends attribute_info {
  /** Maximum size of the operand stack. */
  public int max_stack;
  /** Maximum number of locals required. */

  public int max_locals;
  /** Length of code array. */
  public long code_length;
  /** Actual array of bytecode. */
  public byte code[];
  /** Length of exception table array. */
  public int exception_table_length;
  /**
   * Exception table array.
   *
   * @see exception_table_entry
   */
  public exception_table_entry exception_table[];
  /** Length of attributes array. */
  int attributes_count;
  /**
   * Array of attributes.
   *
   * @see attribute_info
   */
  attribute_info attributes[];

  /**
   * Locates the LocalVariableTable attribute, if one is present.
   *
   * @return the local variable table attribute, or <i>null</i> if not found.
   * @see LocalVariableTable_attribute
   * @see method_info#makeLocals
   */
  public LocalVariableTable_attribute findLocalVariableTable() {
    int i;
    for (i = 0; i < attributes_count; i++) {
      if (attributes[i] instanceof LocalVariableTable_attribute) {
        return (LocalVariableTable_attribute) (attributes[i]);
      }
    }
    return null;
  }

  /**
   * Locates the LocalVariableTypeTable attribute, if one is present.
   *
   * @return the local variable type table attribute, or <i>null</i> if not found.
   * @see LocalVariableTypeTable_attribute
   * @see method_info#makeLocals
   */
  public LocalVariableTypeTable_attribute findLocalVariableTypeTable() {
    int i;
    for (i = 0; i < attributes_count; i++) {
      if (attributes[i] instanceof LocalVariableTypeTable_attribute) {
        return (LocalVariableTypeTable_attribute) (attributes[i]);
      }
    }
    return null;
  }
}
