From: Michael Roth Date: Mon, 30 Apr 2012 14:33:30 +0000 (-0500) Subject: qapi: String visitor, use %f representation for floats X-Git-Tag: TizenStudio_2.0_p2.3.2~208^2~4017^2~5 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=173bbb754f53e8bfc8e4d488f2ed66fe1072ed69;p=sdk%2Femulator%2Fqemu.git qapi: String visitor, use %f representation for floats Currently string-output-visitor formats floats as %g, which is nice in that trailing 0's are automatically truncated, but otherwise this causes some issues: - it uses 6 significant figures instead of 6 decimal places, which means something like 155777.5 (which even has an exact floating point representation) will be rounded to 155778 when converted to a string. - output will be presented in scientific notation when the normalized form requires a 10^x multiplier. Not a huge deal, but arguably less readable for command-line arguments. - due to using scientific notation for numbers requiring more than 6 significant figures, instead of hard-defined decimal places, it fails a lot of the test-visitor-serialization unit tests for floats. Instead, let's just use %f, which is what the QJSON and the QMP visitors use. Signed-off-by: Michael Roth Signed-off-by: Andreas Färber --- diff --git a/qapi/string-output-visitor.c b/qapi/string-output-visitor.c index 92b0305..34e525e 100644 --- a/qapi/string-output-visitor.c +++ b/qapi/string-output-visitor.c @@ -52,7 +52,7 @@ static void print_type_number(Visitor *v, double *obj, const char *name, Error **errp) { StringOutputVisitor *sov = DO_UPCAST(StringOutputVisitor, visitor, v); - string_output_set(sov, g_strdup_printf("%g", *obj)); + string_output_set(sov, g_strdup_printf("%f", *obj)); } char *string_output_get_string(StringOutputVisitor *sov) diff --git a/tests/test-string-output-visitor.c b/tests/test-string-output-visitor.c index 22909b8..608f14a 100644 --- a/tests/test-string-output-visitor.c +++ b/tests/test-string-output-visitor.c @@ -84,7 +84,7 @@ static void test_visitor_out_number(TestOutputVisitorData *data, str = string_output_get_string(data->sov); g_assert(str != NULL); - g_assert_cmpstr(str, ==, "3.14"); + g_assert_cmpstr(str, ==, "3.140000"); g_free(str); }