/**
* Copies the character from this text builder into the destination character array.
*
* @param srcBegin this text start index.
* @param srcEnd this text end index (not included).
* @param dst the destination array to copy the data into.
* @param dstBegin the offset into the destination array.
* @throws IndexOutOfBoundsException if <code>(srcBegin < 0) ||
* (dstBegin < 0) || (srcBegin > srcEnd) || (srcEnd > this.length())
* || ((dstBegin + srcEnd - srcBegin) > dst.length)</code>
*/
public final void getChars(int srcBegin, int srcEnd, char[] dst, int dstBegin) {
if ((srcBegin < 0) || (srcBegin > srcEnd) || (srcEnd > this._length))
throw new IndexOutOfBoundsException();
for (int i = srcBegin, j = dstBegin; i < srcEnd; ) {
char[] chars0 = _high[i >> B1];
int i0 = i & M1;
int length = MathLib.min(C1 - i0, srcEnd - i);
System.arraycopy(chars0, i0, dst, j, length);
i += length;
j += length;
}
}
/**
* Appends the decimal representation of the specified <code>long</code> argument.
*
* @param l the <code>long</code> to format.
* @return <code>this</code>
*/
public final TextBuilder append(long l) {
if (l <= 0) {
if (l == 0) return append("0");
if (l == Long.MIN_VALUE) // Negation would overflow.
return append("-9223372036854775808");
append('-');
l = -l;
}
if (l <= Integer.MAX_VALUE) return append((int) l);
append(l / 1000000000);
int i = (int) (l % 1000000000);
int digits = MathLib.digitLength(i);
append("000000000", 0, 9 - digits);
return append(i);
}
/**
* Appends the decimal representation of the specified <code>int</code> argument.
*
* @param i the <code>int</code> to format.
* @return <code>this</code>
*/
public final TextBuilder append(int i) {
if (i <= 0) {
if (i == 0) return append("0");
if (i == Integer.MIN_VALUE) // Negation would overflow.
return append("-2147483648");
append('-');
i = -i;
}
int digits = MathLib.digitLength(i);
if (_capacity < _length + digits) increaseCapacity();
_length += digits;
for (int index = _length - 1; ; index--) {
int j = i / 10;
_high[index >> B1][index & M1] = (char) ('0' + i - (j * 10));
if (j == 0) return this;
i = j;
}
}
/**
* Appends the characters from a subarray of the char array argument.
*
* @param chars the character array source.
* @param offset the index of the first character to append.
* @param length the number of character to append.
* @return <code>this</code>
* @throws IndexOutOfBoundsException if <code>(offset < 0) ||
* (length < 0) || ((offset + length) > chars.length)</code>
*/
public final TextBuilder append(char chars[], int offset, int length) {
final int end = offset + length;
if ((offset < 0) || (length < 0) || (end > chars.length)) throw new IndexOutOfBoundsException();
int newLength = _length + length;
while (_capacity < newLength) {
increaseCapacity();
}
for (int i = offset, j = _length; i < end; ) {
char[] dstChars = _high[j >> B1];
int dstBegin = j & M1;
int inc = MathLib.min(C1 - dstBegin, end - i);
System.arraycopy(chars, i, dstChars, dstBegin, inc);
i += inc;
j += inc;
}
_length = newLength;
return this;
}
/**
* Appends a subsequence of the specified text. If the specified character sequence is <code>null
* </code> this method is equivalent to <code>append("null")</code>.
*
* @param txt the text to append or <code>null</code>.
* @param start the index of the first character to append.
* @param end the index after the last character to append.
* @return <code>this</code>
* @throws IndexOutOfBoundsException if <code>(start < 0) || (end < 0)
* || (start > end) || (end > txt.length())</code>
*/
public final TextBuilder append(Text txt, int start, int end) {
if (txt == null) return append("null");
if ((start < 0) || (end < 0) || (start > end) || (end > txt.length()))
throw new IndexOutOfBoundsException();
int newLength = _length + end - start;
while (_capacity < newLength) {
increaseCapacity();
}
for (int i = start, j = _length; i < end; ) {
char[] chars = _high[j >> B1];
int dstBegin = j & M1;
int inc = MathLib.min(C1 - dstBegin, end - i);
txt.getChars(i, (i += inc), chars, dstBegin);
j += inc;
}
_length = newLength;
return this;
}
private final void appendFraction(long l, int digits, boolean showZero) {
append('.');
if (l == 0)
if (showZero)
for (int i = 0; i < digits; i++) {
append('0');
}
else append('0');
else { // l is different from zero.
int length = MathLib.digitLength(l);
for (int j = length; j < digits; j++) {
append('0'); // Add leading zeros.
}
if (!showZero)
while (l % 10 == 0) {
l /= 10; // Remove trailing zeros.
}
append(l);
}
}
/**
* Prints out this text builder to the specified writer.
*
* @param writer the destination writer.
*/
public void print(Writer writer) throws IOException {
for (int i = 0; i < _length; i += C1) {
char[] chars = _high[i >> B1];
writer.write(chars, 0, MathLib.min(C1, _length - i));
}
}
/**
* Appends the textual representation of the specified <code>double</code> according to the
* specified formatting arguments.
*
* @param d the <code>double</code> value.
* @param digits the number of significative digits (excludes exponent) or <code>-1</code> to
* mimic the standard library (16 or 17 digits).
* @param scientific <code>true</code> to forces the use of the scientific notation (e.g. <code>
* 1.23E3</code>); <code>false</code> otherwise.
* @param showZero <code>true</code> if trailing fractional zeros are represented; <code>false
* </code> otherwise.
* @return <code>TypeFormat.format(d, digits, scientific, showZero, this)</code>
* @throws IllegalArgumentException if <code>(digits > 19)</code>)
*/
public final TextBuilder append(double d, int digits, boolean scientific, boolean showZero) {
if (digits > 19) throw new IllegalArgumentException("digits: " + digits);
if (d != d) // NaN
return append("NaN");
if (d == Double.POSITIVE_INFINITY) return append("Infinity");
if (d == Double.NEGATIVE_INFINITY) return append("-Infinity");
if (d == 0.0) { // Zero.
if (digits < 0) return append("0.0");
append('0');
if (showZero) {
append('.');
for (int j = 1; j < digits; j++) {
append('0');
}
}
return this;
}
if (d < 0) { // Work with positive number.
d = -d;
append('-');
}
// Find the exponent e such as: value == x.xxx * 10^e
int e = MathLib.floorLog10(d);
long m;
if (digits < 0) { // Use 16 or 17 digits.
// Try 17 digits.
long m17 = MathLib.toLongPow10(d, (17 - 1) - e);
// Check if we can use 16 digits.
long m16 = m17 / 10;
double dd = MathLib.toDoublePow10(m16, e - 16 + 1);
if (dd == d) { // 16 digits is enough.
digits = 16;
m = m16;
} else { // We cannot remove the last digit.
digits = 17;
m = m17;
}
} else // Use the specified number of digits.
m = MathLib.toLongPow10(d, (digits - 1) - e);
// Formats.
if (scientific || (e >= digits)) {
// Scientific notation has to be used ("x.xxxEyy").
long pow10 = POW10_LONG[digits - 1];
int k = (int) (m / pow10); // Single digit.
append((char) ('0' + k));
m = m - pow10 * k;
appendFraction(m, digits - 1, showZero);
append('E');
append(e);
} else { // Dot within the string ("xxxx.xxxxx").
int exp = digits - e - 1;
if (exp < POW10_LONG.length) {
long pow10 = POW10_LONG[exp];
long l = m / pow10;
append(l);
m = m - pow10 * l;
} else append('0'); // Result of the division by a power of 10 larger than any long.
appendFraction(m, exp, showZero);
}
return this;
}
/**
* Appends the textual representation of the specified <code>double</code>; the number of digits
* is 17 or 16 when the 16 digits representation can be parsed back to the same <code>double
* </code> (mimic the standard library formatting).
*
* @param d the <code>double</code> to format.
* @return <code>append(d, -1, (MathLib.abs(d) >= 1E7) ||
* (MathLib.abs(d) < 0.001), false)</code>
*/
public final TextBuilder append(double d) {
return append(d, -1, (MathLib.abs(d) >= 1E7) || (MathLib.abs(d) < 0.001), false);
}
/**
* Appends the textual representation of the specified <code>float</code>.
*
* @param f the <code>float</code> to format.
* @return <code>append(f, 10, (abs(f) >= 1E7) || (abs(f) < 0.001), false)</code>
*/
public final TextBuilder append(float f) {
return append(f, 10, (MathLib.abs(f) >= 1E7) || (MathLib.abs(f) < 0.001), false);
}