natstring.cc

gcc的组建

    return false;
  jstring other = (jstring) anObject;
  if (count != other->count)
    return false;
  /* if both are interned, return false. */
  jint i = count;
  jchar *xptr = JvGetStringChars (this);
  jchar *yptr = JvGetStringChars (other);
  while (--i >= 0)
    {
      if (*xptr++ != *yptr++)
	return false;
    }
  return true;
}

jboolean
java::lang::String::contentEquals(java::lang::StringBuffer* buffer)
{
  if (buffer == NULL)
    throw new NullPointerException;
  JvSynchronize sync(buffer);
  if (count != buffer->count)
    return false;
  if (data == buffer->value)
    return true; // Possible if shared.
  jint i = count;
  jchar *xptr = JvGetStringChars(this);
  jchar *yptr = elements(buffer->value);
  while (--i >= 0)
    if (*xptr++ != *yptr++)
      return false;
  return true;
}

jboolean
java::lang::String::contentEquals(java::lang::CharSequence *seq)
{
  if (seq->length() != count)
    return false;
  jchar *value = JvGetStringChars(this);
  for (int i = 0; i < count; ++i)
    if (value[i] != seq->charAt(i))
      return false;
  return true;
}

jchar
java::lang::String::charAt(jint i)
{
  if (i < 0 || i >= count)
    throw new java::lang::StringIndexOutOfBoundsException(i);
  return JvGetStringChars(this)[i];
}

void
java::lang::String::getChars(jint srcBegin, jint srcEnd,
			     jcharArray dst, jint dstBegin)
{
  jint dst_length = JvGetArrayLength (dst);
  if (srcBegin < 0 || srcBegin > srcEnd || srcEnd > count)
    throw new java::lang::StringIndexOutOfBoundsException;
  // The 2nd part of the test below is equivalent to 
  // dstBegin + (srcEnd-srcBegin) > dst_length
  // except that it does not overflow.
  if (dstBegin < 0 || dstBegin > dst_length - (srcEnd-srcBegin))
    throw new ArrayIndexOutOfBoundsException;
  jchar *dPtr = elements (dst) + dstBegin;
  jchar *sPtr = JvGetStringChars (this) + srcBegin;
  jint i = srcEnd-srcBegin;
  while (--i >= 0)
    *dPtr++ = *sPtr++;
}

jbyteArray
java::lang::String::getBytes (jstring enc)
{
  jint todo = length();
  jint buflen = todo;
  jbyteArray buffer = JvNewByteArray(todo);
  jint bufpos = 0;
  jint offset = 0;
  gnu::gcj::convert::UnicodeToBytes *converter
    = gnu::gcj::convert::UnicodeToBytes::getEncoder(enc);
  while (todo > 0 || converter->havePendingBytes())
    {
      converter->setOutput(buffer, bufpos);
      int converted = converter->write(this, offset, todo, NULL);
      bufpos = converter->count;
      if (converted == 0 && bufpos == converter->count)
	{
	  buflen *= 2;
	  jbyteArray newbuffer = JvNewByteArray(buflen);
	  memcpy (elements (newbuffer), elements (buffer), bufpos);
	  buffer = newbuffer;
	}
      else
	bufpos = converter->count;

      offset += converted;
      todo -= converted;
    }
  converter->done ();
  if (bufpos == buflen)
    return buffer;
  jbyteArray result = JvNewByteArray(bufpos);
  memcpy (elements (result), elements (buffer), bufpos);
  return result;
}

void
java::lang::String::getBytes(jint srcBegin, jint srcEnd,
			     jbyteArray dst, jint dstBegin)
{
  jint dst_length = JvGetArrayLength (dst);
  if (srcBegin < 0 || srcBegin > srcEnd || srcEnd > count)
    throw new java::lang::StringIndexOutOfBoundsException;
  // The 2nd part of the test below is equivalent to 
  // dstBegin + (srcEnd-srcBegin) > dst_length
  // except that it does not overflow.
  if (dstBegin < 0 || dstBegin > dst_length - (srcEnd-srcBegin))
    throw new ArrayIndexOutOfBoundsException;
  jbyte *dPtr = elements (dst) + dstBegin;
  jchar *sPtr = JvGetStringChars (this) + srcBegin;
  jint i = srcEnd-srcBegin;
  while (--i >= 0)
    *dPtr++ = (jbyte) *sPtr++;
}

jcharArray
java::lang::String::toCharArray()
{
  jcharArray array = JvNewCharArray(count);
  jchar *dPtr = elements (array);
  jchar *sPtr = JvGetStringChars (this);
  jint i = count;
  while (--i >= 0)
    *dPtr++ = *sPtr++;
  return array;
}

jboolean
java::lang::String::equalsIgnoreCase (jstring anotherString)
{
  if (anotherString == NULL || count != anotherString->count)
    return false;
  jchar *tptr = JvGetStringChars (this);
  jchar *optr = JvGetStringChars (anotherString);
  jint i = count;
  while (--i >= 0)
    {
      jchar tch = *tptr++;
      jchar och = *optr++;
      if (tch != och
	  && (java::lang::Character::toLowerCase (tch)
	      != java::lang::Character::toLowerCase (och))
	  && (java::lang::Character::toUpperCase (tch)
	      != java::lang::Character::toUpperCase (och)))
	return false;
    }
  return true;
}

jboolean
java::lang::String::regionMatches (jint toffset,
				   jstring other, jint ooffset, jint len)
{
  if (toffset < 0 || ooffset < 0 || len < 0
      || toffset > count - len
      || ooffset > other->count - len)
    return false;
  jchar *tptr = JvGetStringChars (this) + toffset;
  jchar *optr = JvGetStringChars (other) + ooffset;
  jint i = len;
  while (--i >= 0)
    {
      if (*tptr++ != *optr++)
	return false;
    }
  return true;
}

jint
java::lang::String::compareTo (jstring anotherString)
{
  jchar *tptr = JvGetStringChars (this);
  jchar *optr = JvGetStringChars (anotherString);
  jint tlen = this->count;
  jint olen = anotherString->count;
  jint i = tlen > olen ? olen : tlen;
  while (--i >= 0)
    {
      jchar tch = *tptr++;
      jchar och = *optr++;
      if (tch != och)
	return (jint) tch - (jint) och;
    }
  return tlen - olen;
}

jboolean
java::lang::String::regionMatches (jboolean ignoreCase, jint toffset,
				   jstring other, jint ooffset, jint len)
{
  if (toffset < 0 || ooffset < 0 || len < 0
      || toffset > count - len
      || ooffset > other->count - len)
    return false;
  jchar *tptr = JvGetStringChars (this) + toffset;
  jchar *optr = JvGetStringChars (other) + ooffset;
  jint i = len;
  if (ignoreCase)
    while (--i >= 0)
      {
	jchar tch = *tptr++;
	jchar och = *optr++;
	if ((java::lang::Character::toLowerCase (tch)
	     != java::lang::Character::toLowerCase (och))
	    && (java::lang::Character::toUpperCase (tch)
		!= java::lang::Character::toUpperCase (och)))
	  return false;
      }
  else
    while (--i >= 0)
      {
	jchar tch = *tptr++;
	jchar och = *optr++;
	if (tch != och)
	  return false;
      }
  return true;
}

jboolean
java::lang::String::startsWith (jstring prefix, jint toffset)
{
  jint i = prefix->count;
  if (toffset < 0 || toffset > count - i)
    return false;
  jchar *xptr = JvGetStringChars (this) + toffset;
  jchar *yptr = JvGetStringChars (prefix);
  while (--i >= 0)
    {
      if (*xptr++ != *yptr++)
	return false;
    }
  return true;
}

jint
java::lang::String::indexOf (jint ch, jint fromIndex)
{
  if (fromIndex < 0)
    fromIndex = 0;
  jchar *ptr = JvGetStringChars(this);
  for (;; ++fromIndex)
    {
      if (fromIndex >= count)
	return -1;
      if (ptr[fromIndex] == ch)
	return fromIndex;
    }
}

jint
java::lang::String::indexOf (jstring s, jint fromIndex)
{
  const jchar *const xchars = JvGetStringChars(s);
  const jchar *const ychars = JvGetStringChars(this) + fromIndex;
  
  const int xlength = s->length ();
  const int ylength = length () - fromIndex;
  
  int i = 0;
  int j = 0;

  while (i < ylength && j < xlength)
    {
      if (xchars[j] != ychars[i])
	{
	  i = i - j + 1;
	  j = 0;
	}
      else
	i++, j++;
    }

  if (j >= xlength)
    return fromIndex + i - xlength;
  else
    return -1;
}
    
jint
java::lang::String::lastIndexOf (jint ch, jint fromIndex)
{
  if (fromIndex >= count)
    fromIndex = count - 1;
  jchar *ptr = JvGetStringChars(this);
  for (;; --fromIndex)
    {
      if (fromIndex < 0)
	return -1;
      if (ptr[fromIndex] == ch)
	return fromIndex;
    }
}

jstring
java::lang::String::substring (jint beginIndex, jint endIndex)
{
  if (beginIndex < 0 || endIndex > count || beginIndex > endIndex)
    throw new StringIndexOutOfBoundsException;
  if (beginIndex == 0 && endIndex == count)
    return this;
  jint newCount = endIndex - beginIndex;
  // For very small strings, just allocate a new one.  For other
  // substrings, allocate a new one unless the substring is over half
  // of the original string.
  if (newCount <= 8 || newCount < (count >> 1))
    return JvNewString(JvGetStringChars(this) + beginIndex, newCount);
  jstring s = new String();
  s->data = data;
  s->count = newCount;
  s->boffset = boffset + sizeof(jchar) * beginIndex;
  return s;
}

jstring
java::lang::String::concat(jstring str)
{
  jint str_count = str->count;
  if (str_count == 0)
    return this;
  jstring result = JvAllocString(count + str_count);
  jchar *dstPtr = JvGetStringChars(result);
  jchar *srcPtr = JvGetStringChars(this);
  jint i = count;
  while (--i >= 0)
    *dstPtr++ = *srcPtr++;
  srcPtr = JvGetStringChars(str);
  i = str->count;
  while (--i >= 0)
    *dstPtr++ = *srcPtr++;
  return result;
}

jstring
java::lang::String::replace (jchar oldChar, jchar newChar)
{
  jint i;
  jchar* chrs = JvGetStringChars (this);
  for (i = 0;  ;  i++)
    {
      if (i == count)
	return this;
      if (chrs[i] == oldChar)
	break;
    }
  jstring result = JvAllocString (count);
  jchar *dPtr = JvGetStringChars (result);
  for (int j = 0;  j < i;  j++)
    *dPtr++ = chrs[j];
  for (; i < count;  i++)
    {
      jchar ch = chrs[i];
      if (ch == oldChar)
	ch = newChar;
      *dPtr++ = ch;
    }
  return result;
}

jstring
java::lang::String::toLowerCase (java::util::Locale *locale)
{
  jint i;
  jchar* chrs = JvGetStringChars(this);
  jchar ch = 0;

  bool handle_tr = false;
  if (locale != NULL)
    {
      String *lang = locale->getLanguage ();
      if (lang->length () == 2
	  && lang->charAt (0) == 't'
	  && lang->charAt (1) == 'r')
	handle_tr = true;
    }

  for (i = 0;  ;  i++)
    {
      if (i == count)
	return this;
      jchar origChar = chrs[i];

      if (handle_tr && (origChar == CAPITAL_I
			|| origChar == CAPITAL_I_WITH_DOT))
	break;

      ch = java::lang::Character::toLowerCase(origChar);
      if (ch != origChar)
	break;
    }
  jstring result = JvAllocString(count);
  jchar *dPtr = JvGetStringChars (result);
  for (int j = 0;  j < i;  j++)
    *dPtr++ = chrs[j];
  *dPtr++ = ch;  i++;
  for (; i < count;  i++)
    {
      if (handle_tr && chrs[i] == CAPITAL_I)
	*dPtr++ = SMALL_DOTLESS_I;
      else if (handle_tr && chrs[i] == CAPITAL_I_WITH_DOT)
	*dPtr++ = SMALL_I;
      else
	*dPtr++ = java::lang::Character::toLowerCase(chrs[i]);
    }
  return result;
}

jstring
java::lang::String::toUpperCase (java::util::Locale *locale)
{
  jint i;
  jchar* chrs = JvGetStringChars(this);
  jchar ch;

  // When handling a specific locale there might be special rules.
  // Currently all existing rules are simply handled inline, as there
  // are only two and they are documented in the online 1.2 docs.
  bool handle_esset = locale != NULL;
  bool handle_tr = false;
  if (locale != NULL)
    {
      String *lang = locale->getLanguage ();
      if (lang->length () == 2
	  && lang->charAt (0) == 't'
	  && lang->charAt (1) == 'r')
	handle_tr = true;
    }

  int new_count = count;
  bool new_string = false;
  for (i = 0;  ;  i++)
    {
      if (i == count)
	break;
      jchar origChar = chrs[i];

      if (handle_esset && origChar == ESSET)
	{
	  ++new_count;
	  new_string = true;
	}
      else if (handle_tr && (origChar == SMALL_I
			     || origChar == SMALL_DOTLESS_I))
	new_string = true;
      else
	{
	  ch = java::lang::Character::toUpperCase(origChar);
	  if (ch != origChar)
	    new_string = true;
	}

      if (new_string && ! handle_esset)
	break;
    }
  if (! new_string)
    return this;
  jstring result = JvAllocString(new_count);
  jchar *dPtr = JvGetStringChars (result);
  for (i = 0; i < count;  i++)
    {
      if (handle_esset && chrs[i] == ESSET)
	{
	  *dPtr++ = CAPITAL_S;
	  *dPtr++ = CAPITAL_S;
	}
      else if (handle_tr && chrs[i] == SMALL_I)
	*dPtr++ = CAPITAL_I_WITH_DOT;
      else if (handle_tr && chrs[i] == SMALL_DOTLESS_I)
	*dPtr++ = CAPITAL_I;
      else
	*dPtr++ = java::lang::Character::toUpperCase(chrs[i]);
    }
  return result;
}

jstring
java::lang::String::trim ()
{
  jchar* chrs = JvGetStringChars(this);
  if (count == 0 || (chrs[0] > ' ' && chrs[count-1] > ' '))
    return this;
  jint preTrim = 0;
  for (;; preTrim++)
    {
      if (preTrim == count)
	return new String();
      if (chrs[preTrim] > ' ')
	break;
    }
  jint endTrim = count;
  while (chrs[endTrim-1] <= ' ')
    endTrim--;
  return substring(preTrim, endTrim);
}

jstring
java::lang::String::valueOf(jcharArray data, jint offset, jint count)
{
  jint data_length = JvGetArrayLength (data);
  if (offset < 0 || count < 0 || offset > data_length - count)
    throw new ArrayIndexOutOfBoundsException;
  jstring result = JvAllocString(count);
  jchar *sPtr = elements (data) + offset;
  jchar *dPtr = JvGetStringChars(result);
  while (--count >= 0)
    *dPtr++ = *sPtr++;
  return result;
}

jstring
java::lang::String::valueOf(jchar c)
{
  jstring result = JvAllocString(1);
  JvGetStringChars (result)[0] = c;
  return result;
}