Attachment 6504 Details for Bug 7821 – new unit test source file test/cairo-fixed.c

new unit test source file test/cairo-fixed.c

cairo-fixed.c (text/plain), 2.01 KB, created by Peter Moulder on 2006-08-09 00:27:23 UTC

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Creator: Peter Moulder

Created: 2006-08-09 00:27:23 UTC

Size: 2.01 KB

patch

obsolete

>#include "cairo-test.h"
>#include "cairoint.h"
>
>#define G_N_ELEMENTS(_a) (sizeof (_a) / sizeof (*_a))
>
>static int rc = CAIRO_TEST_SUCCESS;
>
>static void
>fail_require_equal (char const a[], char const b[])
>{
>    cairo_test_log ("Unexpectedly unequal: %s, %s\n", a, b);
>    rc = CAIRO_TEST_FAILURE;
>}
>
>static void
>fail_require (char const p[])
>{
>    cairo_test_log ("Failed requirement `%s'\n", p);
>    rc = CAIRO_TEST_FAILURE;
>}
>
>#define REQUIRE_EQUAL(_a, _b) ((void) (((_a) == (_b)) || (fail_require_equal (#_a, #_b), 1)))
>#define REQUIRE(_p) ((void) ((_p) || (fail_require (#_p), 1)))
>
>int main (void)
>{
>    cairo_test_init ("cairo-fixed");
>
>    /* Round-trip from ints. */
>    {
>	/* N.B. I don't know what range we actually require to be able to round-trip.
>	 * I removed -32768 from the cases[] array just because it fails several tests. */
>	int const cases[] = {0, 1, 5, 0x7f, 0xff, 0x7fff,
>			     -1, -5, -127, -128, -32767};
>	unsigned i;
>	for (i = 0; i < G_N_ELEMENTS (cases); ++i) {
>	    cairo_fixed_t const fromint = _cairo_fixed_from_int (cases[i]);
>	    cairo_fixed_t const fromdbl = _cairo_fixed_from_double ((double) (cases[i]));
>	    cairo_fixed_t const more = _cairo_fixed_from_double (cases[i] + 1/65536.0);
>	    cairo_fixed_t const less = _cairo_fixed_from_double (cases[i] - 1/65536.0);
>	    REQUIRE_EQUAL (fromint, fromdbl);
>	    REQUIRE_EQUAL (_cairo_fixed_integer_part (fromint), cases[i]);
>	    REQUIRE_EQUAL (_cairo_fixed_to_double (fromint), cases[i]);
>	    REQUIRE (_cairo_fixed_is_integer (fromint));
>	    REQUIRE (!_cairo_fixed_is_integer (more));
>	    REQUIRE (!_cairo_fixed_is_integer (less));
>	    REQUIRE_EQUAL (_cairo_fixed_integer_floor (fromint), cases[i]);
>	    REQUIRE_EQUAL (_cairo_fixed_integer_ceil (fromint), cases[i]);
>
>	    REQUIRE_EQUAL (_cairo_fixed_integer_floor (more), cases[i]);
>	    REQUIRE_EQUAL (_cairo_fixed_integer_floor (less), cases[i] - 1);
>	    REQUIRE_EQUAL (_cairo_fixed_integer_ceil (more), cases[i] + 1);
>	    REQUIRE_EQUAL (_cairo_fixed_integer_ceil (less), cases[i]);
>	}
>    }
>
>    return rc;
>}

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Attachments on bug 7821: 6503 | 6504

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