Method: U::String#squeeze

Defined in:
ext/u/rb_u_string_squeeze.c

#squeeze(*sets) ⇒ U::String

Returns the receiver, replacing any substrings of #length > 1 consisting of the same character c with c, where c is a member of the intersection of the character sets in SETS, inheriting any taint and untrust.

If SETS is empty, then the set of all Unicode characters is used.

The complement of all Unicode characters and a given set of characters may be specified by prefixing a non-empty set with ‘‘^`’ (U+005E CIRCUMFLEX ACCENT).

Any sequence of characters a-b inside a set will expand to also include all characters whose code points lay between those of a and b.

Parameters:

Returns:



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# File 'ext/u/rb_u_string_squeeze.c', line 52

VALUE
rb_u_string_squeeze(int argc, VALUE *argv, VALUE self)
{
        const struct rb_u_string *string = RVAL2USTRING(self);

        if (USTRING_LENGTH(string) == 0)
                return Qnil;

        struct tr_table table;
        if (argc > 0)
                tr_table_initialize_from_strings(&table, argc, argv);

        struct tr_table *table_pointer = (argc > 0) ? &table : NULL;

        long count = rb_u_string_squeeze_loop(string, table_pointer, NULL);
        if (count == 0)
                return self;

        char *remaining = ALLOC_N(char, count + 1);
        rb_u_string_squeeze_loop(string, table_pointer, remaining);
        remaining[count] = '\0';

        return rb_u_string_new_c_own(self, remaining, count);
}