//C++ TO C# CONVERTER WARNING: 'const' methods are not available in C#:
//ORIGINAL LINE: const Trie* trieTable() const
public Trie trieTable()
{
//C++ TO C# CONVERTER TODO TASK: There is no equivalent to 'reinterpret_cast' in C#:
return(reinterpret_cast <const Trie>(bytes() + trie_offset));
}
// calculate hyphenation from patterns, assuming alphabet lookup has already
// been done
/**
* Internal implementation, after conversion to codes. All case folding and
* normalization has been done by now, and all characters have been found in the
* alphabet. Note: len here is the padded length including 0 codes at start and
* end.
**/
private void hyphenateFromCodes(HyphenationType[] result, UInt16[] codes, int len, HyphenationType hyphenValue)
{
//C++ TO C# CONVERTER TODO TASK: There is no equivalent in C# to 'static_assert':
// static_assert(sizeof(HyphenationType) == sizeof(byte), "HyphnationType must be byte.");
// Reuse the result array as a buffer for calculating intermediate hyphenation
// numbers.
//C++ TO C# CONVERTER TODO TASK: There is no equivalent to 'reinterpret_cast' in C#:
byte[] buffer = reinterpret_cast <byte>(result);
Header header = getHeader();
Trie trie = header.trieTable();
Pattern pattern = header.patternTable();
uint char_mask = new uint(trie.char_mask);
uint link_shift = new uint(trie.link_shift);
uint link_mask = new uint(trie.link_mask);
uint pattern_shift = new uint(trie.pattern_shift);
int maxOffset = len - minSuffix - 1;
for (int i = 0; i < len - 1; i++)
{
uint node = 0; // index into Trie table
for (int j = i; j < len; j++)
{
UInt16 c = codes[j];
uint entry = trie.data[node + c];
if ((entry & char_mask) == c)
{
node = (entry & link_mask) >> link_shift;
}
else
{
break;
}
uint pat_ix = trie.data[node] >> pattern_shift;
// pat_ix contains a 3-tuple of length, shift (number of trailing zeros),
// and an offset into the buf pool. This is the pattern for the substring
// (i..j) we just matched, which we combine (via point-wise max) into the
// buffer vector.
if (pat_ix != 0)
{
uint pat_entry = pattern.data[pat_ix];
int pat_len = Pattern.len(new uint(pat_entry));
int pat_shift = Pattern.shift(new uint(pat_entry));
byte[] pat_buf = pattern.buf(new uint(pat_entry));
int offset = j + 1 - (pat_len + pat_shift);
// offset is the index within buffer that lines up with the start of
// pat_buf
int start = Math.Max((int)minPrefix - offset, 0);
int end = Math.Min(pat_len, (int)maxOffset - offset);
for (int k = start; k < end; k++)
{
buffer[offset + k] = Math.Max(buffer[offset + k], pat_buf[k]);
}
}
}
}
// Since the above calculation does not modify values outside
// [minPrefix, len - minSuffix], they are left as 0 = DONT_BREAK.
for (int i = minPrefix; i < maxOffset; i++)
{
// Hyphenation opportunities happen when the hyphenation numbers are odd.
result[i] = ((buffer[i] & 1u) != null) ? hyphenValue : HyphenationType.DONT_BREAK;
}
}
