fixedintegerarray.pmc

/*
Copyright (C) 2001-2012, Parrot Foundation.

=head1 NAME

src/pmc/fixedintegerarray.pmc - fixed size array for integers only

=head1 DESCRIPTION

This class, FixedIntegerArray, implements an array of fixed size which stores
INTVALs.  It uses Integer PMCs for all of the conversions.

=cut

*/

/* HEADERIZER HFILE: none */
/* HEADERIZER BEGIN: static */
/* Don't modify between HEADERIZER BEGIN / HEADERIZER END.  Your changes will be lost. */

PARROT_PURE_FUNCTION
static int auxcmpfunc(ARGIN(const INTVAL *i), ARGIN(const INTVAL *j))
        __attribute__nonnull__(1)
        __attribute__nonnull__(2);

#define ASSERT_ARGS_auxcmpfunc __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
       PARROT_ASSERT_ARG(i) \
    , PARROT_ASSERT_ARG(j))
/* Don't modify between HEADERIZER BEGIN / HEADERIZER END.  Your changes will be lost. */
/* HEADERIZER END: static */


pmclass FixedIntegerArray auto_attrs provides array {
    ATTR INTVAL   size;  /* number of INTVALs stored in this array */
    ATTR INTVAL * int_array; /* INTVALs are stored here */

/*

=head2 Vtable functions

=over 4

=item C<void init()>

Initializes the array.

=cut

*/

    VTABLE void init() {
        UNUSED(INTERP)
        PObj_custom_destroy_SET(SELF);
    }

/*

=item C<void init_int(INTVAL size)>

Initializes the array.

=cut

*/

    VTABLE void init_int(INTVAL size) {
        if (size < 0)
            Parrot_ex_throw_from_c_args(INTERP, NULL, EXCEPTION_OUT_OF_BOUNDS,
                _("FixedIntegerArray: Cannot set array size to a negative number (%d)"), size);
        if (size > 0) {
            SET_ATTR_size(INTERP, SELF, size);
            SET_ATTR_int_array(INTERP, SELF, mem_gc_allocate_n_typed(INTERP, size, INTVAL));
        }
        PObj_custom_destroy_SET(SELF);
    }

/*

=item C<void destroy()>

Destroys the array.

=cut

*/

    VTABLE void destroy() {
        INTVAL* int_array;
        GET_ATTR_int_array(INTERP, SELF, int_array);
        if (int_array)
            Parrot_gc_free_memory_chunk(INTERP, int_array);
    }

/*

=item C<PMC *clone()>

Creates and returns a copy of the array.

=cut

*/

    VTABLE PMC *clone() {
        /* a quick hack to create a clone in the constant PMC arena
         * this is needed for the call signatures
         *
         * a better way would be probably to supply a flag to the clone
         * vtable
         */

        INTVAL * int_array;
        PMC    * const dest = Parrot_pmc_new(INTERP, SELF->vtable->base_type);

        GET_ATTR_int_array(INTERP, SELF, int_array);

        if (int_array) {
            INTVAL size;
            GET_ATTR_size(INTERP, SELF, size);
            {
                INTVAL * const dest_int_array = mem_gc_allocate_n_typed(INTERP,
                        size, INTVAL);
                mem_copy_n_typed(dest_int_array, int_array,
                        size, INTVAL);
                SET_ATTR_int_array(INTERP, dest, dest_int_array);
            }
            SET_ATTR_size(INTERP, dest, size);
            PObj_custom_destroy_SET(dest);
        }

        return dest;
    }

/*

=item C<INTVAL get_bool()>

Returns whether the array has any elements (meaning been initialized, for a
fixed sized array).

=cut

*/
    VTABLE INTVAL get_bool() {
        INTVAL size;
        GET_ATTR_size(INTERP, SELF, size);
        return (INTVAL)(size != 0);
    }

/*

=item C<INTVAL elements()>

=cut

*/

    VTABLE INTVAL elements() {
        INTVAL size;
        GET_ATTR_size(INTERP, SELF, size);

        return size;
    }

/*

=item C<INTVAL get_integer()>

Returns the number of elements in the array.

=cut

*/

    VTABLE INTVAL get_integer() {
        INTVAL size;
        GET_ATTR_size(INTERP, SELF, size);
        return size;
    }


/*

=item C<INTVAL get_integer_keyed_int(INTVAL key)>

Returns the integer value of the element at index C<key>.

=cut

*/

    VTABLE INTVAL get_integer_keyed_int(INTVAL key) {
        INTVAL *int_array;
        INTVAL  size;

        GET_ATTR_size(INTERP, SELF, size);

        if (key < 0 || key >= size)
            Parrot_ex_throw_from_c_args(INTERP, NULL, EXCEPTION_OUT_OF_BOUNDS,
                "FixedIntegerArray: index out of bounds!");

        GET_ATTR_int_array(INTERP, SELF, int_array);
        return int_array[key];
    }

/*

=item C<INTVAL get_integer_keyed(PMC *key)>

Returns the integer value of the element at index C<*key>.

=cut

*/

    VTABLE INTVAL get_integer_keyed(PMC *key) {
        /* simple int keys only */
        const INTVAL k = VTABLE_get_integer(INTERP, key);
        return SELF.get_integer_keyed_int(k);
    }


/*

=item C<FLOATVAL get_number_keyed_int(INTVAL key)>

Returns the floating-point value of the element at index C<key>.

=cut

*/

    VTABLE FLOATVAL get_number_keyed_int(INTVAL key) {
        const INTVAL i = SELF.get_integer_keyed_int(key);
        return (FLOATVAL)i;
    }

/*

=item C<FLOATVAL get_number_keyed(PMC *key)>

Returns the floating-point value of the element at index C<*key>.

=cut

*/

    VTABLE FLOATVAL get_number_keyed(PMC *key) {
        const INTVAL k = VTABLE_get_integer(INTERP, key);
        return SELF.get_number_keyed_int(k);
    }

/*

=item C<STRING *get_string_keyed_int(INTVAL key)>

Returns the Parrot string value of the element at index C<key>.

=cut

*/

    VTABLE STRING *get_string_keyed_int(INTVAL key) {
        PMC * const temp = SELF.get_pmc_keyed_int(key);
        return VTABLE_get_string(INTERP, temp);
    }

/*

=item C<STRING *get_string()>

=item C<STRING *get_repr()>

Returns the Parrot string representation C<key>.

=cut

*/

    VTABLE STRING *get_string() {
        return STATICSELF.get_repr();
    }

    VTABLE STRING *get_repr() {
        STRING *res    = CONST_STRING(INTERP, "[ ");
        INTVAL  n;
        INTVAL  j;

        GET_ATTR_size(INTERP, SELF, n);

        for (j = 0; j < n; ++j) {
            PMC * const val = SELF.get_pmc_keyed_int(j);
            res = Parrot_str_concat(INTERP, res, VTABLE_get_repr(INTERP, val));

            if (j < n - 1)
                res = Parrot_str_concat(INTERP, res, CONST_STRING(INTERP, ", "));
        }

        res = Parrot_str_concat(INTERP, res, CONST_STRING(INTERP, " ]"));
        return res;
    }


/*

=item C<INTVAL hashvalue()>

Get a hashvalue for this PMC.

Providing a non-default C<hashvalue()> implementation avoids creating
unecessary string temporaries.

=cut

*/

    VTABLE INTVAL hashvalue() {
        INTVAL *int_array;
        INTVAL size;
        GET_ATTR_int_array(INTERP, SELF, int_array);
        GET_ATTR_size(INTERP, SELF, size);
        return Parrot_hash_buffer((const unsigned char *)int_array,
                                        size * sizeof (INTVAL), INTERP->hash_seed);
    }


/*

=item C<STRING *get_string_keyed(PMC *key)>

Returns the Parrot string value of the element at index C<*key>.

=cut

*/

    VTABLE STRING *get_string_keyed(PMC *key) {
        const INTVAL k = VTABLE_get_integer(INTERP, key);
        return SELF.get_string_keyed_int(k);
    }


/*

=item C<PMC *get_pmc_keyed_int(INTVAL key)>

Returns the PMC value of the element at index C<key>.

=cut

*/

    VTABLE PMC *get_pmc_keyed_int(INTVAL key) {
        const INTVAL val = SELF.get_integer_keyed_int(key);
        PMC  * const ret = Parrot_pmc_new_init_int(INTERP, enum_class_Integer, val);
        return ret;
    }

/*

=item C<PMC *get_pmc_keyed(PMC *key)>

Returns the PMC value of the element at index C<*key>.

=cut

*/

    VTABLE PMC *get_pmc_keyed(PMC *key) {
        const INTVAL k = VTABLE_get_integer(INTERP, key);
        return SELF.get_pmc_keyed_int(k);
    }

/*

=item C<void set_integer_native(INTVAL size)>

Resizes the array to C<size> elements.

=cut

*/

    VTABLE void set_integer_native(INTVAL size) {
        INTVAL *int_array;
        INTVAL  cur_size;

        GET_ATTR_size(INTERP, SELF, cur_size);

        if (cur_size || size < 1)
            Parrot_ex_throw_from_c_args(INTERP, NULL, EXCEPTION_OUT_OF_BOUNDS,
                "FixedIntegerArray: Can't resize!");

        SET_ATTR_size(INTERP, SELF, size);
        GET_ATTR_int_array(INTERP, SELF, int_array);
        SET_ATTR_int_array(INTERP, SELF,
                mem_gc_realloc_n_typed(INTERP, int_array, size, INTVAL));
        PObj_custom_destroy_SET(SELF);
    }

/*

=item C<void set_integer_keyed_int(INTVAL key, INTVAL value)>

Sets the integer value of the element at index C<key> to C<value>.

=cut

*/

    VTABLE void set_integer_keyed_int(INTVAL key, INTVAL value) :manual_wb {
        INTVAL *int_array;
        INTVAL  size;

        GET_ATTR_size(INTERP, SELF, size);

        if (key < 0 || key >= size)
            Parrot_ex_throw_from_c_args(INTERP, NULL, EXCEPTION_OUT_OF_BOUNDS,
                "FixedIntegerArray: index out of bounds!");

        GET_ATTR_int_array(INTERP, SELF, int_array);
        int_array[key] = value;
    }

/*

=item C<void set_integer_keyed(PMC *key, INTVAL value)>

Sets the integer value of the element at index C<key> to C<value>.

=cut

*/

    VTABLE void set_integer_keyed(PMC *key, INTVAL value) :manual_wb {
        const INTVAL k = VTABLE_get_integer(INTERP, key);
        SELF.set_integer_keyed_int(k, value);
    }

/*

=item C<void set_number_keyed_int(INTVAL key, FLOATVAL value)>

Sets the floating-point value of the element at index C<key> to C<value>.

=cut

*/

    VTABLE void set_number_keyed_int(INTVAL key, FLOATVAL value) :manual_wb {
        SELF.set_integer_keyed_int(key, (INTVAL)value);
    }

/*

=item C<void set_number_keyed(PMC *key, FLOATVAL value)>

Sets the floating-point value of the element at index C<key> to C<value>.

=cut

*/

    VTABLE void set_number_keyed(PMC *key, FLOATVAL value) :manual_wb {
        const INTVAL k = VTABLE_get_integer(INTERP, key);
        SELF.set_number_keyed_int(k, value);
    }

/*

=item C<void set_string_keyed_int(INTVAL key, STRING *value)>

Sets the Parrot string value of the element at index C<key> to C<value>.

=cut

*/

    VTABLE void set_string_keyed_int(INTVAL key, STRING *value) :manual_wb {
        const INTVAL tempInt = Parrot_str_to_int(INTERP, value);
        SELF.set_integer_keyed_int(key, tempInt);
    }

/*

=item C<void set_string_keyed(PMC *key, STRING *value)>

Sets the string value of the element at index C<key> to C<value>.

=cut

*/

    VTABLE void set_string_keyed(PMC *key, STRING *value) :manual_wb {
        const INTVAL k = VTABLE_get_integer(INTERP, key);
        SELF.set_string_keyed_int(k, value);
    }

/*

=item C<void set_pmc_keyed_int(INTVAL key, PMC *src)>

Sets the PMC value of the element at index C<key> to C<*src>.

=cut

*/

    VTABLE void set_pmc_keyed_int(INTVAL key, PMC *src) :manual_wb {
        const INTVAL tempInt = VTABLE_get_integer(INTERP, src);
        SELF.set_integer_keyed_int(key, tempInt);
    }

/*

=item C<void set_pmc_keyed(PMC *key, PMC *value)>

Sets the string value of the element at index C<key> to C<value>.

=cut

*/

    VTABLE void set_pmc_keyed(PMC *key, PMC *value) :manual_wb {
        const INTVAL k = VTABLE_get_integer(INTERP, key);
        SELF.set_pmc_keyed_int(k, value);
    }

/*

=item C<INTVAL is_equal(PMC *value)>

The C<==> operation. Compares two array to hold equal elements.

=cut

*/

    VTABLE INTVAL is_equal(PMC *value) {
        INTVAL j, n;

        if (value->vtable->base_type != SELF->vtable->base_type)
            return 0;

        n = SELF.elements();

        if (VTABLE_elements(INTERP, value) != n)
            return 0;

        for (j = 0; j < n; ++j) {
            const INTVAL item1 = SELF.get_integer_keyed_int(j);
            const INTVAL item2 = VTABLE_get_integer_keyed_int(INTERP, value, j);

            if (item1 != item2)
                return 0;
        }

        return 1;
    }

/*

=item C<PMC *get_iter()>

Return a new Iterator for this PMC.

=cut

*/

    VTABLE PMC *get_iter() {
        return Parrot_pmc_new_init(INTERP, enum_class_ArrayIterator, SELF);
    }

/*

=item C<void freeze(PMC *info)>

Used to archive the array.

=item C<void thaw(PMC *info)>

Used to unarchive the array.

C<*info> is the visit info, (see F<include/parrot/pmc_freeze.h>).

=cut

*/

    VTABLE void freeze(PMC *info) {
        INTVAL   *int_array;
        INTVAL    i, n;

        SUPER(info);

        GET_ATTR_size(INTERP, SELF, n);
        VTABLE_push_integer(INTERP, info, n);
        GET_ATTR_int_array(INTERP, SELF, int_array);

        for (i = 0; i < n; ++i)
            VTABLE_push_integer(INTERP, info, int_array[i]);
    }

    VTABLE void thaw(PMC *info) {
        const INTVAL n = VTABLE_shift_integer(INTERP, info);
        SELF.init_int(n);
        if (n > 0) {
            INTVAL  i;
            INTVAL *int_array;
            GET_ATTR_int_array(INTERP, SELF, int_array);
            for (i = 0; i < n; ++i)
                int_array[i] = VTABLE_shift_integer(INTERP, info);
        }
    }

/*

=back

=head2 Methods

=over 4

=item C<PMC *sort()>

Sort the array and return self.

=cut

*/

    METHOD sort(PMC *cmp_func :optional) {
        UINTVAL n;
        INTVAL  size;

        GET_ATTR_size(INTERP, SELF, size);
        n = (UINTVAL)size;

        if (n > 1) {
            INTVAL *int_array;
            GET_ATTR_int_array(INTERP, SELF, int_array);
            if (PMC_IS_NULL(cmp_func))
                qsort(int_array, n, sizeof (INTVAL),
                        (int (*)(const void *, const void*))auxcmpfunc);
            else
                Parrot_util_quicksort(INTERP, (void**)int_array, n, cmp_func, "II->I");
        }
        RETURN(PMC *SELF);
    }

/*

=item C<METHOD reverse()>

Reverse the contents of the array.

=cut

*/

    METHOD reverse() {
        INTVAL n;
        GET_ATTR_size(INTERP, SELF, n);
        if (n > 1) {
            INTVAL val;
            INTVAL *data;
            INTVAL i;

            GET_ATTR_int_array(INTERP, SELF, data);
            for (i = 0; i <= --n; i++) {
                val = data[i];
                data[i] = data[n];
                data[n] = val;
            }
        }
    }

}

/*

=back

=head2 Auxiliary functions

=over 4

=item C<static int auxcmpfunc(const INTVAL *i, const INTVAL *j)>

INTVAL compare function for qsort usage.

=cut

*/

PARROT_PURE_FUNCTION
static int
auxcmpfunc(ARGIN(const INTVAL *i), ARGIN(const INTVAL *j))
{
    ASSERT_ARGS(auxcmpfunc)
    return *i - *j;
}

/*

=back

=head1 SEE ALSO

F<docs/pdds/pdd17_basic_types.pod>.

=cut

*/

/*
 * Local variables:
 *   c-file-style: "parrot"
 * End:
 * vim: expandtab shiftwidth=4 cinoptions='\:2=2' :
 */