com.jogamp.gluegen.cgram.types.ArrayType Maven / Gradle / Ivy

/*
 * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
 * Copyright (c) 2010 JogAmp Community. All rights reserved.
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 * This software is provided "AS IS," without a warranty of any kind. ALL
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package com.jogamp.gluegen.cgram.types;

/** Represents an array type. This differs from a pointer type in C
    syntax by the use of "[]" rather than "*". The length may or may
    not be known; if the length is unknown then a negative number
    should be passed in to the constructor. */

public class ArrayType extends MemoryLayoutType implements Cloneable {
  private final Type elementType;
  private final int length;
  private String computedName;

  public ArrayType(final Type elementType, final SizeThunk sizeInBytes, final int length, final int cvAttributes) {
    super(elementType.getName() + " *", sizeInBytes, cvAttributes);
    this.elementType = elementType;
    this.length      = length;
  }

  @Override
  public boolean equals(final Object arg) {
    if (arg == this) return true;
    if (arg == null || (!(arg instanceof ArrayType))) {
      return false;
    }
    final ArrayType t = (ArrayType) arg;
    return (super.equals(arg) && elementType.equals(t.elementType) && (length == t.length));
  }

  @Override
  public String getName(final boolean includeCVAttrs) {
    // Lazy computation of name due to lazy setting of compound type
    // names during parsing
    // Note: don't think cvAttributes can be set for array types (unlike pointer types)
    if (computedName == null) {
      computedName = (elementType.getName() + " *").intern();
    }
    return computedName;
  }

  @Override
  public ArrayType asArray()      { return this; }

  public Type    getElementType() { return elementType; }
  public int     getLength()      { return length;      }
  public boolean hasLength()      { return length >= 0; }

  @Override
  public Type getBaseElementType() {
    ArrayType t = this;
    while (t.getElementType().isArray()) {
      t = t.getElementType().asArray();
    }
    return t.getElementType();
    // return elementType.getBaseElementType();
  }

  /** Recompute the size of this array if necessary. This needs to be
      done when the base element type is a compound type after layouting. */
  void recomputeSize() {
    final ArrayType arrayElementType = getElementType().asArray();
    if (arrayElementType != null) {
      arrayElementType.recomputeSize();
    }
    super.setSize(SizeThunk.mul(SizeThunk.constant(getLength()), elementType.getSize()));
  }

  @Override
  public String toString() {
    return toString(null);
  }

  public String toString(final String variableName) {
    final StringBuilder buf = new StringBuilder();
    if(elementType.isConst()) {
        buf.append("const ");
    }
    buf.append(elementType.getName());
    if (variableName != null) {
      buf.append(" ");
      buf.append(variableName);
    }
    buf.append("[");
    buf.append(length);
    buf.append("]");
    return buf.toString();
  }

  @Override
  public void visit(final TypeVisitor arg) {
    super.visit(arg);
    elementType.visit(arg);
  }

  @Override
  Type newCVVariant(final int cvAttributes) {
    return new ArrayType(elementType, getSize(), length, cvAttributes);
  }
}