Function splitsubfields

src/botl.c:2687–2727

splitsubfields(): splits str in place into '+' or '&' separated strings. returns number of strings, or -1 if more than maxsf or MAX_SUBFIELDS */

/* splitsubfields(): splits str in place into '+' or '&' separated strings.
   returns number of strings, or -1 if more than maxsf or MAX_SUBFIELDS */
staticfn int
splitsubfields(char *str, char ***sfarr, int maxsf)
{
#define MAX_SUBFIELDS 16
    static char *subfields[MAX_SUBFIELDS];
    char *st = (char *) 0;
    int sf = 0;

    if (!str)
        return 0;
    for (sf = 0; sf < MAX_SUBFIELDS; ++sf)
        subfields[sf] = (char *) 0;

    maxsf = (maxsf == 0) ? MAX_SUBFIELDS : min(maxsf, MAX_SUBFIELDS);

    if (strchr(str, '+') || strchr(str, '&')) {
        char *c = str;

        sf = 0;
        st = c;
        while (*c && sf < maxsf) {
            if (*c == '&' || *c == '+') {
                *c = '\0';
                subfields[sf] = st;
                st = c+1;
                sf++;
            }
            c++;
        }
        if (sf >= maxsf - 1)
            return -1;
        if (!*c && c != st)
            subfields[sf++] = st;
    } else {
        sf = 1;
        subfields[0] = str;
    }
    *sfarr = subfields;
    return sf;
#undef MAX_SUBFIELDS
}

staticfn boolean
is_fld_arrayvalues(