/// <summary>
/// Reverse a string.
/// </summary>
//shemran/Note: this is used for secondary order value reverse, no
// need to consider supplementary pair.
internal static void Reverse(StringBuffer result, int from, int to)
{
int i = from;
char swap;
int j = to - 1;
while (i < j)
{
swap = result.CharAt(i);
result.SetCharAt(i, result.CharAt(j));
result.SetCharAt(j, swap);
i++;
j--;
}
}
private StringBuffer CheckForPositiveExponent(StringBuffer number)
{
int len = number.Length();
for (int i = len - 2; i >= 0; --i)
{
var c = number.CharAt(i);
if (c == 'e' || c == 'E')
{
if (number.CharAt(i + 1) == '-')
{
return(number);
}
return(number.Insert(i + 1, "+"));
}
}
return(number);
}
private static StringBuffer ToASCIILower(StringBuffer input)
{
StringBuffer dest = new StringBuffer();
for (int i = 0; i < input.Length(); i++)
{
dest.Append(ToASCIILower(input.CharAt(i)));
}
return(dest);
}
//
// to check if a string starts with ACE-prefix
//
private static bool StartsWithACEPrefix(StringBuffer input)
{
bool startsWithPrefix = true;
if (input.Length() < ACE_PREFIX_LENGTH)
{
return(false);
}
for (int i = 0; i < ACE_PREFIX_LENGTH; i++)
{
if (ToASCIILower(input.CharAt(i)) != ACE_PREFIX.CharAt(i))
{
startsWithPrefix = false;
}
}
return(startsWithPrefix);
}
/* Normalize the given pathname, whose length is len, starting at the given
* offset; everything before this offset is already normal. */
private String Normalize(String path, int len, int off)
{
if (len == 0)
{
return(path);
}
if (off < 3) // Avoid fencepost cases with UNC pathnames
{
off = 0;
}
int src;
char slash = this.Slash;
StringBuffer sb = new StringBuffer(len);
if (off == 0)
{
/* Complete normalization, including prefix */
src = NormalizePrefix(path, len, sb);
}
else
{
/* Partial normalization */
src = off;
sb.Append(path.Substring(0, off));
}
/* Remove redundant slashes from the remainder of the path, forcing all
* slashes into the preferred slash */
while (src < len)
{
char c = path.CharAt(src++);
if (IsSlash(c))
{
while ((src < len) && IsSlash(path.CharAt(src)))
{
src++;
}
if (src == len)
{
/* Check for trailing separator */
int sn = sb.Length();
if ((sn == 2) && (sb.CharAt(1) == ':'))
{
/* "z:\\" */
sb.Append(slash);
break;
}
if (sn == 0)
{
/* "\\" */
sb.Append(slash);
break;
}
if ((sn == 1) && (IsSlash(sb.CharAt(0))))
{
/* "\\\\" is not collapsed to "\\" because "\\\\" marks
* the beginning of a UNC pathname. Even though it is
* not, by itself, a valid UNC pathname, we leave it as
* is in order to be consistent with the win32 APIs,
* which treat this case as an invalid UNC pathname
* rather than as an alias for the root directory of
* the current drive. */
sb.Append(slash);
break;
}
/* Path does not denote a root directory, so do not append
* trailing slash */
break;
}
else
{
sb.Append(slash);
}
}
else
{
sb.Append(c);
}
}
String rv = sb.ToString();
return(rv);
}
/*
* Converts unicodes to encoded \uxxxx and writes out any of the
* characters in specialSaveChars with a preceding slash
*
* @param theString
* the string needing convert.
* @param dst
* Save of the result
* @param offset
* the offset of result
* @param escapeSpace
* if <code>true</code>, escape Space
* @param lengthFlag
* Whether add one byte of length in the result.
* <code>true</code> add one byte of length in the result
* @param getLengthFlag
* Calculate the length of result, if <code>true</code>, thestring length that return.
* @return if getLengthFlag = false, return offset of the result.
* if getLengthFlag = true, the length of the sequence of characters represented by this
* object.
*/
public static int saveConvert(string theString, byte[] dst, int offset, bool escapeSpace, bool lengthFlag, bool getLengthFlag)
{
if (false == getLengthFlag
&& (null == dst || dst.Length < (offset + (lengthFlag ? 1 : 0))
|| dst.Length < 1 || offset < 0))
return -1;
if (null == theString)
theString = "";
int length = theString.Length;
StringBuffer outBuffer = new StringBuffer (length * 2);
for (int x = 0; x < length; x++) {
char aChar = theString [x];
switch (aChar) {
case ' ':
if (x == 0 || escapeSpace)
outBuffer.Append ('\\');
outBuffer.Append (' ');
break;
case '\\':
outBuffer.Append ('\\');
break;
case '\t':
outBuffer.Append ('\\');
outBuffer.Append ('t');
break;
case '\n':
outBuffer.Append ('\\');
outBuffer.Append ('n');
break;
case '\r':
outBuffer.Append ('\\');
outBuffer.Append ('r');
break;
case '\f':
outBuffer.Append ('\\');
outBuffer.Append ('f');
break;
default:
if ((aChar < 0x0020) || (aChar > 0x007e)) {
outBuffer.Append ('\\');
outBuffer.Append ('u');
outBuffer.Append (toHexChar ((aChar >> 12) & 0xF));
outBuffer.Append (toHexChar ((aChar >> 8) & 0xF));
outBuffer.Append (toHexChar ((aChar >> 4) & 0xF));
outBuffer.Append (toHexChar (aChar & 0xF));
} else {
if (specialSaveChars.IndexOf (aChar) != -1)
outBuffer.Append ('\\');
outBuffer.Append (aChar);
}
break;
}
}
length = outBuffer.Length ();
if (length > 255)
length = 255;
if (!getLengthFlag) {
if (dst.Length >= offset + length + (lengthFlag ? 1 : 0)) {
if (lengthFlag) {
dst [offset] = (byte)(length & 0xFF);
offset++;
}
for (int i = 0; i < length; i++) {
dst [offset] = (byte)outBuffer.CharAt (i);
offset++;
}
length = offset;
} else {
length = -1;
}
} else {
if (lengthFlag)
length = length + 1;
}
outBuffer = null;
return length;
}
/*
* Converts unicodes to encoded \uxxxx and writes out any of the
* characters in specialSaveChars with a preceding slash
*
* @param theString
* the string needing convert.
* @param dst
* Save of the result
* @param offset
* the offset of result
* @param escapeSpace
* if <code>true</code>, escape Space
* @param lengthFlag
* Whether add one byte of length in the result.
* <code>true</code> add one byte of length in the result
* @param getLengthFlag
* Calculate the length of result, if <code>true</code>, thestring length that return.
* @return if getLengthFlag = false, return offset of the result.
* if getLengthFlag = true, the length of the sequence of characters represented by this
* object.
*/
public static int saveConvert(string theString, byte[] dst, int offset, bool escapeSpace, bool lengthFlag, bool getLengthFlag)
{
if (false == getLengthFlag &&
(null == dst || dst.Length < (offset + (lengthFlag ? 1 : 0)) ||
dst.Length < 1 || offset < 0))
{
return(-1);
}
if (null == theString)
{
theString = "";
}
int length = theString.Length;
StringBuffer outBuffer = new StringBuffer(length * 2);
for (int x = 0; x < length; x++)
{
char aChar = theString [x];
switch (aChar)
{
case ' ':
if (x == 0 || escapeSpace)
{
outBuffer.Append('\\');
}
outBuffer.Append(' ');
break;
case '\\':
outBuffer.Append('\\');
break;
case '\t':
outBuffer.Append('\\');
outBuffer.Append('t');
break;
case '\n':
outBuffer.Append('\\');
outBuffer.Append('n');
break;
case '\r':
outBuffer.Append('\\');
outBuffer.Append('r');
break;
case '\f':
outBuffer.Append('\\');
outBuffer.Append('f');
break;
default:
if ((aChar < 0x0020) || (aChar > 0x007e))
{
outBuffer.Append('\\');
outBuffer.Append('u');
outBuffer.Append(toHexChar((aChar >> 12) & 0xF));
outBuffer.Append(toHexChar((aChar >> 8) & 0xF));
outBuffer.Append(toHexChar((aChar >> 4) & 0xF));
outBuffer.Append(toHexChar(aChar & 0xF));
}
else
{
if (specialSaveChars.IndexOf(aChar) != -1)
{
outBuffer.Append('\\');
}
outBuffer.Append(aChar);
}
break;
}
}
length = outBuffer.Length();
if (length > 255)
{
length = 255;
}
if (!getLengthFlag)
{
if (dst.Length >= offset + length + (lengthFlag ? 1 : 0))
{
if (lengthFlag)
{
dst [offset] = (byte)(length & 0xFF);
offset++;
}
for (int i = 0; i < length; i++)
{
dst [offset] = (byte)outBuffer.CharAt(i);
offset++;
}
length = offset;
}
else
{
length = -1;
}
}
else
{
if (lengthFlag)
{
length = length + 1;
}
}
outBuffer = null;
return(length);
}