public static TranslationLengthCorrector Create(IEnumerable <GraphemeTranslation> translations,
Language srcLanguage)
{
int variantCount = srcLanguage.MaxLetter - srcLanguage.MinLetter + 1;
TranslationLengthCorrector t = new(
srcLanguage.MinLetter,
new GraphemeVariant {
Variants = new GraphemeVariant?[variantCount]
}
);
foreach (GraphemeTranslation translation in translations)
{
if (string.IsNullOrEmpty(translation.Original.Letters))
{
continue;
}
ref var vs = ref t.root.Variants;
GraphemeVariant?v = null;
foreach (char letter in translation.Original.Letters)
{
vs ??= new GraphemeVariant[variantCount];
v = vs[letter - t.offset];
if (v == null)
{
v = new GraphemeVariant();
vs[letter - t.offset] = v;
}
vs = ref v.Variants;
}
if (v != null)
{
v.ExistGrapheme = true;
}
}
private TranslationLengthCorrector(int offset, GraphemeVariant root)
{
this.offset = offset;
this.root = root;
}