public StringBuffer Prepare(String src, StringPrepOptions options)
{
int ch;
String mapOut = Map(src, options);
UCharacterIterator iter = UCharacterIterator.GetInstance(mapOut);
UCharacterDirection direction = UCharacterDirectionExtensions.CharDirectionCount,
firstCharDir = UCharacterDirectionExtensions.CharDirectionCount;
int rtlPos = -1, ltrPos = -1;
bool rightToLeft = false, leftToRight = false;
while ((ch = iter.NextCodePoint()) != UCharacterIterator.Done)
{
if (transform.prohibitedSet.Contains(ch) == true && ch != 0x0020)
{
throw new StringPrepParseException("A prohibited code point was found in the input",
StringPrepErrorType.ProhibitedError,
iter.GetText(), iter.Index);
}
direction = UChar.GetDirection(ch);
if (firstCharDir == UCharacterDirectionExtensions.CharDirectionCount)
{
firstCharDir = direction;
}
if (direction == UCharacterDirection.LeftToRight)
{
leftToRight = true;
ltrPos = iter.Index - 1;
}
if (direction == UCharacterDirection.RightToLeft || direction == UCharacterDirection.RightToLeftArabic)
{
rightToLeft = true;
rtlPos = iter.Index - 1;
}
}
// satisfy 2
if (leftToRight == true && rightToLeft == true)
{
throw new StringPrepParseException("The input does not conform to the rules for BiDi code points.",
StringPrepErrorType.CheckBiDiError, iter.GetText(), (rtlPos > ltrPos) ? rtlPos : ltrPos);
}
//satisfy 3
if (rightToLeft == true &&
!((firstCharDir == UCharacterDirection.RightToLeft || firstCharDir == UCharacterDirection.RightToLeftArabic) &&
(direction == UCharacterDirection.RightToLeft || direction == UCharacterDirection.RightToLeftArabic))
)
{
throw new StringPrepParseException("The input does not conform to the rules for BiDi code points.",
StringPrepErrorType.CheckBiDiError, iter.GetText(), (rtlPos > ltrPos) ? rtlPos : ltrPos);
}
return(new StringBuffer(mapOut));
}
private String Map(String src, StringPrepOptions options)
{
// map
bool allowUnassigned = ((options & ALLOW_UNASSIGNED) > 0);
// disable test
String caseMapOut = mapTransform.Transliterate(src);
UCharacterIterator iter = UCharacterIterator.GetInstance(caseMapOut);
int ch;
while ((ch = iter.NextCodePoint()) != UCharacterIterator.Done)
{
if (transform.unassignedSet.Contains(ch) == true && allowUnassigned == false)
{
throw new StringPrepParseException("An unassigned code point was found in the input",
StringPrepErrorType.UnassignedError);
}
}
return(caseMapOut);
}
/// <summary>
/// Prepare the input String for use in applications with the given profile. This operation maps, normalizes(NFKC),
/// checks for prohibited and BiDi characters in the order defined by RFC 3454
/// depending on the options specified in the profile.
/// </summary>
/// <param name="src">A string.</param>
/// <param name="options">A bit set of options:
/// <list type="bullet">
/// <item><term><see cref="StringPrepOptions.Default"/></term><description>Prohibit processing of unassigned code points in the input.</description></item>
/// <item><term><see cref="StringPrepOptions.AllowUnassigned"/></term><description>Treat the unassigned code points are in the input as normal Unicode code points.</description></item>
/// </list>
/// </param>
/// <returns>A string containing the output.</returns>
/// <exception cref="StringPrepParseException">An exception occurs when parsing a string is invalid.</exception>
/// <stable>ICU 4.2</stable>
public string Prepare(string src, StringPrepOptions options)
{
StringBuffer result = Prepare(UCharacterIterator.GetInstance(src), options);
return(result.ToString());
}
/*
* boolean isLabelSeparator(int ch){
* int result = getCodePointValue(ch);
* if( (result & 0x07) == LABEL_SEPARATOR){
* return true;
* }
* return false;
* }
*/
/*
* 1) Map -- For each character in the input, check if it has a mapping
* and, if so, replace it with its mapping.
*
* 2) Normalize -- Possibly normalize the result of step 1 using Unicode
* normalization.
*
* 3) Prohibit -- Check for any characters that are not allowed in the
* output. If any are found, return an error.
*
* 4) Check bidi -- Possibly check for right-to-left characters, and if
* any are found, make sure that the whole string satisfies the
* requirements for bidirectional strings. If the string does not
* satisfy the requirements for bidirectional strings, return an
* error.
* [Unicode3.2] defines several bidirectional categories; each character
* has one bidirectional category assigned to it. For the purposes of
* the requirements below, an "RandALCat character" is a character that
* has Unicode bidirectional categories "R" or "AL"; an "LCat character"
* is a character that has Unicode bidirectional category "L". Note
*
*
* that there are many characters which fall in neither of the above
* definitions; Latin digits (<U+0030> through <U+0039>) are examples of
* this because they have bidirectional category "EN".
*
* In any profile that specifies bidirectional character handling, all
* three of the following requirements MUST be met:
*
* 1) The characters in section 5.8 MUST be prohibited.
*
* 2) If a string contains any RandALCat character, the string MUST NOT
* contain any LCat character.
*
* 3) If a string contains any RandALCat character, a RandALCat
* character MUST be the first character of the string, and a
* RandALCat character MUST be the last character of the string.
*/
/// <summary>
/// Prepare the input buffer for use in applications with the given profile. This operation maps, normalizes(NFKC),
/// checks for prohibited and BiDi characters in the order defined by RFC 3454
/// depending on the options specified in the profile.
/// </summary>
/// <param name="src">A <see cref="UCharacterIterator"/> object containing the source string.</param>
/// <param name="options">A bit set of options:
/// <list type="bullet">
/// <item><term><see cref="StringPrepOptions.Default"/></term><description>Prohibit processing of unassigned code points in the input.</description></item>
/// <item><term><see cref="StringPrepOptions.AllowUnassigned"/></term><description>Treat the unassigned code points are in the input as normal Unicode code points.</description></item>
/// </list>
/// </param>
/// <returns>A <see cref="StringBuffer"/> containing the output.</returns>
/// <exception cref="StringPrepParseException">An exception occurs when parsing a string is invalid.</exception>
/// <stable>ICU 2.8</stable>
public StringBuffer Prepare(UCharacterIterator src, StringPrepOptions options)
{
// map
StringBuffer mapOut = Map(src, options);
StringBuffer normOut = mapOut;// initialize
if (doNFKC)
{
// normalize
normOut = Normalize(mapOut);
}
int ch;
char result;
UCharacterIterator iter = UCharacterIterator.GetInstance(normOut);
Values val = new Values();
#pragma warning disable 612, 618
UCharacterDirection direction = UCharacterDirection.CharDirectionCount,
firstCharDir = UCharacterDirection.CharDirectionCount;
#pragma warning restore 612, 618
int rtlPos = -1, ltrPos = -1;
bool rightToLeft = false, leftToRight = false;
while ((ch = iter.NextCodePoint()) != UCharacterIterator.DONE)
{
result = GetCodePointValue(ch);
GetValues(result, val);
if (val.type == PROHIBITED)
{
throw new StringPrepParseException("A prohibited code point was found in the input",
StringPrepErrorType.ProhibitedError, iter.GetText(), val.value);
}
if (checkBiDi)
{
direction = (UCharacterDirection)bdp.GetClass(ch);
#pragma warning disable 612, 618
if (firstCharDir == UCharacterDirection.CharDirectionCount)
#pragma warning restore 612, 618
{
firstCharDir = direction;
}
if (direction == UCharacterDirection.LeftToRight)
{
leftToRight = true;
ltrPos = iter.Index - 1;
}
if (direction == UCharacterDirection.RightToLeft || direction == UCharacterDirection.RightToLeftArabic)
{
rightToLeft = true;
rtlPos = iter.Index - 1;
}
}
}
if (checkBiDi == true)
{
// satisfy 2
if (leftToRight == true && rightToLeft == true)
{
throw new StringPrepParseException("The input does not conform to the rules for BiDi code points.",
StringPrepErrorType.CheckBiDiError, iter.GetText(),
(rtlPos > ltrPos) ? rtlPos : ltrPos);
}
//satisfy 3
if (rightToLeft == true &&
!((firstCharDir == UCharacterDirection.RightToLeft || firstCharDir == UCharacterDirection.RightToLeftArabic) &&
(direction == UCharacterDirection.RightToLeft || direction == UCharacterDirection.RightToLeftArabic))
)
{
throw new StringPrepParseException("The input does not conform to the rules for BiDi code points.",
StringPrepErrorType.CheckBiDiError, iter.GetText(),
(rtlPos > ltrPos) ? rtlPos : ltrPos);
}
}
return(normOut);
}
private StringBuffer Map(UCharacterIterator iter, StringPrepOptions options)
{
Values val = new Values();
char result = (char)0;
int ch = UCharacterIterator.DONE;
StringBuffer dest = new StringBuffer();
bool allowUnassigned = ((options & StringPrepOptions.AllowUnassigned) > 0);
while ((ch = iter.NextCodePoint()) != UCharacterIterator.DONE)
{
result = GetCodePointValue(ch);
GetValues(result, val);
// check if the source codepoint is unassigned
if (val.type == UNASSIGNED && allowUnassigned == false)
{
throw new StringPrepParseException("An unassigned code point was found in the input",
StringPrepErrorType.UnassignedError,
iter.GetText(), iter.Index);
}
else if ((val.type == MAP))
{
int index, length;
if (val.isIndex)
{
index = val.value;
if (index >= indexes[ONE_UCHAR_MAPPING_INDEX_START] &&
index < indexes[TWO_UCHARS_MAPPING_INDEX_START])
{
length = 1;
}
else if (index >= indexes[TWO_UCHARS_MAPPING_INDEX_START] &&
index < indexes[THREE_UCHARS_MAPPING_INDEX_START])
{
length = 2;
}
else if (index >= indexes[THREE_UCHARS_MAPPING_INDEX_START] &&
index < indexes[FOUR_UCHARS_MAPPING_INDEX_START])
{
length = 3;
}
else
{
length = mappingData[index++];
}
/* copy mapping to destination */
dest.Append(mappingData, index, length);
continue;
}
else
{
ch -= val.value;
}
}
else if (val.type == DELETE)
{
// just consume the codepoint and contine
continue;
}
//copy the source into destination
UTF16.Append(dest, ch);
}
return(dest);
}
public StringBuffer Prepare(UCharacterIterator src,
StringPrepOptions options)
{
return(Prepare(src.GetText(), options));
}
