[aseek-devel] charset code

[Gregory Kozlovsky]

Hello, Kir,

Do you know, at least something about what the following code from
charset.cpp mean?
Is it some kind of hashing? Why is the assignement repeated twice?

void MakeWordRange(TCHARSET* charset)
{
    mdemset(charset->wordch, 0, sizeof(charset->wordch));
    unsigned char* pc = charset->chars;
    while (*pc)
    {
        charset->wordch[*pc >> 3] |= (1 << (*pc & 7));
        pc++;
    }
    pc = (unsigned char*)WORDCHAR;
    while (*pc)
    {
        charset->wordch[*pc >> 3] |= (1 << (*pc & 7));
        pc++;
    }
}

and

int WordChar(unsigned char s, int charset)
{
    return Charsets[charset].wordch[s >> 3] & (1 << (s & 7)) ? 1 : 0;
}


        Gregory Kozlovsky

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