From patchwork Thu Jun 1 22:02:55 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Blake X-Patchwork-Id: 13264486 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id A8AF7C7EE23 for ; Thu, 1 Jun 2023 22:04:56 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1q4qOb-00088l-3g; Thu, 01 Jun 2023 18:03:49 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1q4qOE-000811-Vi for qemu-devel@nongnu.org; Thu, 01 Jun 2023 18:03:28 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1q4qO7-00040S-0F for qemu-devel@nongnu.org; Thu, 01 Jun 2023 18:03:26 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1685656998; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=wiXkXER8uesPX1hAnl9UtsUSmcZNtf/rlQzv7UVzhsQ=; b=H7/snjCfM7uMaRzVl3rP08UXi7QJSLPT3wuh1ycnthaMGoaRxfVjd8WG8fEVfWqEWD7LXO wM2qJdVag62bzDPF/3M+xBdPGjnDbrikpHZkp+CFMmkfK2ZvMIVgGGV8VkQMMyMzwvgaBa eCX+3BfBXrTXnTXff1tA7jP1w1rwEmc= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-226-94AmhW3INyW-2iTYjc-qpw-1; Thu, 01 Jun 2023 18:03:16 -0400 X-MC-Unique: 94AmhW3INyW-2iTYjc-qpw-1 Received: from smtp.corp.redhat.com (int-mx10.intmail.prod.int.rdu2.redhat.com [10.11.54.10]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 92BCC101AA42 for ; Thu, 1 Jun 2023 22:03:16 +0000 (UTC) Received: from green.redhat.com (unknown [10.2.16.76]) by smtp.corp.redhat.com (Postfix) with ESMTP id 513E0492B0A; Thu, 1 Jun 2023 22:03:16 +0000 (UTC) From: Eric Blake To: qemu-devel@nongnu.org Cc: Hanna Czenczek Subject: [PULL 11/21] test-cutils: Add coverage of qemu_strtod Date: Thu, 1 Jun 2023 17:02:55 -0500 Message-Id: <20230601220305.2130121-12-eblake@redhat.com> In-Reply-To: <20230601220305.2130121-1-eblake@redhat.com> References: <20230601220305.2130121-1-eblake@redhat.com> MIME-Version: 1.0 Content-type: text/plain X-Scanned-By: MIMEDefang 3.1 on 10.11.54.10 Received-SPF: pass client-ip=170.10.133.124; envelope-from=eblake@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -22 X-Spam_score: -2.3 X-Spam_bar: -- X-Spam_report: (-2.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.166, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org It's hard to tweak code for consistency if I can't prove what will or won't break from those tweaks. Time to add unit tests for qemu_strtod() and qemu_strtod_finite(). Among other things, I wrote a check whether we have C99 semantics for strtod("0x1") (which MUST parse hex numbers) rather than C89 (which must stop parsing at 'x'). These days, I suspect that is okay; but if it fails CI checks, knowing the difference will help us decide what we want to do about it. Note that C2x, while not final at the time of this patch, has been considering whether to make strtol("0b1") parse as 1 with no slop instead of the C17 parse of 0 with slop "b1"; that decision may also bleed over to strtod(). But for now, I didn't think it worth adding unit tests on that front (to strtol or strtod) as things may still change. Likewise, there are plenty more corner cases of strtod proper that I don't explicitly test here, but there are enough unit tests added here that it covers all the branches reached in our wrappers. In particular, it demonstrates the difference on when *value is left uninitialized, which an upcoming patch will normalize. Signed-off-by: Eric Blake Reviewed-by: Hanna Czenczek Message-Id: <20230522190441.64278-10-eblake@redhat.com> --- tests/unit/test-cutils.c | 512 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 512 insertions(+) diff --git a/tests/unit/test-cutils.c b/tests/unit/test-cutils.c index 20ab0ecb673..e05572cd92c 100644 --- a/tests/unit/test-cutils.c +++ b/tests/unit/test-cutils.c @@ -25,6 +25,8 @@ * THE SOFTWARE. */ +#include + #include "qemu/osdep.h" #include "qemu/cutils.h" #include "qemu/units.h" @@ -2789,6 +2791,487 @@ static void test_qemu_strtou64_full_erange_junk(void) g_assert_cmpuint(res, ==, UINT64_MAX); } +static void test_qemu_strtod_simple(void) +{ + const char *str; + const char *endptr; + int err; + double res; + + /* no radix or exponent */ + str = "1"; + endptr = "somewhere"; + res = 999; + err = qemu_strtod(str, &endptr, &res); + g_assert_cmpint(err, ==, 0); + g_assert_cmpfloat(res, ==, 1.0); + g_assert_true(endptr == str + 1); + + /* leading space and sign */ + str = " -0.0"; + endptr = "somewhere"; + res = 999; + err = qemu_strtod(str, &endptr, &res); + g_assert_cmpint(err, ==, 0); + g_assert_cmpfloat(res, ==, -0.0); + g_assert_true(signbit(res)); + g_assert_true(endptr == str + 5); + + /* fraction only */ + str = "+.5"; + endptr = "somewhere"; + res = 999; + err = qemu_strtod(str, &endptr, &res); + g_assert_cmpint(err, ==, 0); + g_assert_cmpfloat(res, ==, 0.5); + g_assert_true(endptr == str + 3); + + /* exponent */ + str = "1.e+1"; + endptr = "somewhere"; + res = 999; + err = qemu_strtod(str, &endptr, &res); + g_assert_cmpint(err, ==, 0); + g_assert_cmpfloat(res, ==, 10.0); + g_assert_true(endptr == str + 5); + + /* hex without radix */ + str = "0x10"; + endptr = "somewhere"; + res = 999; + err = qemu_strtod(str, &endptr, &res); + g_assert_cmpint(err, ==, 0); + g_assert_cmpfloat(res, ==, 16.0); + g_assert_true(endptr == str + 4); +} + +static void test_qemu_strtod_einval(void) +{ + const char *str; + const char *endptr; + int err; + double res; + + /* empty */ + str = ""; + endptr = "somewhere"; + res = 999; + err = qemu_strtod(str, &endptr, &res); + g_assert_cmpint(err, ==, -EINVAL); + g_assert_cmpfloat(res, ==, 0.0); + g_assert_false(signbit(res)); + g_assert_true(endptr == str); + + /* NULL */ + str = NULL; + endptr = "random"; + res = 999; + err = qemu_strtod(str, &endptr, &res); + g_assert_cmpint(err, ==, -EINVAL); + g_assert_cmpfloat(res, ==, 999.0); + g_assert_null(endptr); + + /* not recognizable */ + str = " junk"; + endptr = "somewhere"; + res = 999; + err = qemu_strtod(str, &endptr, &res); + g_assert_cmpint(err, ==, -EINVAL); + g_assert_cmpfloat(res, ==, 0.0); + g_assert_false(signbit(res)); + g_assert_true(endptr == str); +} + +static void test_qemu_strtod_erange(void) +{ + const char *str; + const char *endptr; + int err; + double res; + + /* overflow */ + str = "9e999"; + endptr = "somewhere"; + res = 999; + err = qemu_strtod(str, &endptr, &res); + g_assert_cmpint(err, ==, -ERANGE); + g_assert_cmpfloat(res, ==, HUGE_VAL); + g_assert_true(endptr == str + 5); + + str = "-9e+999"; + endptr = "somewhere"; + res = 999; + err = qemu_strtod(str, &endptr, &res); + g_assert_cmpint(err, ==, -ERANGE); + g_assert_cmpfloat(res, ==, -HUGE_VAL); + g_assert_true(endptr == str + 7); + + /* underflow */ + str = "-9e-999"; + endptr = "somewhere"; + res = 999; + err = qemu_strtod(str, &endptr, &res); + g_assert_cmpint(err, ==, -ERANGE); + g_assert_cmpfloat(res, >=, -DBL_MIN); + g_assert_cmpfloat(res, <=, -0.0); + g_assert_true(signbit(res)); + g_assert_true(endptr == str + 7); +} + +static void test_qemu_strtod_nonfinite(void) +{ + const char *str; + const char *endptr; + int err; + double res; + + /* infinity */ + str = "inf"; + endptr = "somewhere"; + res = 999; + err = qemu_strtod(str, &endptr, &res); + g_assert_cmpint(err, ==, 0); + g_assert_true(isinf(res)); + g_assert_false(signbit(res)); + g_assert_true(endptr == str + 3); + + str = "-infinity"; + endptr = "somewhere"; + res = 999; + err = qemu_strtod(str, &endptr, &res); + g_assert_cmpint(err, ==, 0); + g_assert_true(isinf(res)); + g_assert_true(signbit(res)); + g_assert_true(endptr == str + 9); + + /* not a number */ + str = " NaN"; + endptr = "somewhere"; + res = 999; + err = qemu_strtod(str, &endptr, &res); + g_assert_cmpint(err, ==, 0); + g_assert_true(isnan(res)); + g_assert_true(endptr == str + 4); +} + +static void test_qemu_strtod_trailing(void) +{ + const char *str; + const char *endptr; + int err; + double res; + + /* trailing whitespace */ + str = "1. "; + endptr = "somewhere"; + res = 999; + err = qemu_strtod(str, &endptr, &res); + g_assert_cmpint(err, ==, 0); + g_assert_cmpfloat(res, ==, 1.0); + g_assert_true(endptr == str + 2); + + endptr = "somewhere"; + res = 999; + err = qemu_strtod(str, NULL, &res); + g_assert_cmpint(err, ==, -EINVAL); + g_assert_cmpfloat(res, ==, 1.0); + + /* trailing e is not an exponent */ + str = ".5e"; + endptr = "somewhere"; + res = 999; + err = qemu_strtod(str, &endptr, &res); + g_assert_cmpint(err, ==, 0); + g_assert_cmpfloat(res, ==, 0.5); + g_assert_true(endptr == str + 2); + + endptr = "somewhere"; + res = 999; + err = qemu_strtod(str, NULL, &res); + g_assert_cmpint(err, ==, -EINVAL); + g_assert_cmpfloat(res, ==, 0.5); + + /* trailing ( not part of long NaN */ + str = "nan("; + endptr = "somewhere"; + res = 999; + err = qemu_strtod(str, &endptr, &res); + g_assert_cmpint(err, ==, 0); + g_assert_true(isnan(res)); + g_assert_true(endptr == str + 3); + + endptr = "somewhere"; + res = 999; + err = qemu_strtod(str, NULL, &res); + g_assert_cmpint(err, ==, -EINVAL); + g_assert_true(isnan(res)); +} + +static void test_qemu_strtod_erange_junk(void) +{ + const char *str; + const char *endptr; + int err; + double res; + + /* ERANGE with trailing junk... */ + str = "1e-999junk"; + endptr = "somewhere"; + res = 999; + err = qemu_strtod(str, &endptr, &res); + g_assert_cmpint(err, ==, -ERANGE); + g_assert_cmpfloat(res, <=, DBL_MIN); + g_assert_cmpfloat(res, >=, 0.0); + g_assert_false(signbit(res)); + g_assert_true(endptr == str + 6); + + /* ...has less priority than EINVAL when full parse not possible */ + endptr = "somewhere"; + res = 999; + err = qemu_strtod(str, NULL, &res); + g_assert_cmpint(err, ==, -EINVAL); + g_assert_cmpfloat(res, ==, 0.0); + g_assert_false(signbit(res)); +} + +static void test_qemu_strtod_finite_simple(void) +{ + const char *str; + const char *endptr; + int err; + double res; + + /* no radix or exponent */ + str = "1"; + endptr = "somewhere"; + res = 999; + err = qemu_strtod_finite(str, &endptr, &res); + g_assert_cmpint(err, ==, 0); + g_assert_cmpfloat(res, ==, 1.0); + g_assert_true(endptr == str + 1); + + /* leading space and sign */ + str = " -0.0"; + endptr = "somewhere"; + res = 999; + err = qemu_strtod_finite(str, &endptr, &res); + g_assert_cmpint(err, ==, 0); + g_assert_cmpfloat(res, ==, -0.0); + g_assert_true(signbit(res)); + g_assert_true(endptr == str + 5); + + /* fraction only */ + str = "+.5"; + endptr = "somewhere"; + res = 999; + err = qemu_strtod_finite(str, &endptr, &res); + g_assert_cmpint(err, ==, 0); + g_assert_cmpfloat(res, ==, 0.5); + g_assert_true(endptr == str + 3); + + /* exponent */ + str = "1.e+1"; + endptr = "somewhere"; + res = 999; + err = qemu_strtod_finite(str, &endptr, &res); + g_assert_cmpint(err, ==, 0); + g_assert_cmpfloat(res, ==, 10.0); + g_assert_true(endptr == str + 5); + + /* hex without radix */ + str = "0x10"; + endptr = "somewhere"; + res = 999; + err = qemu_strtod(str, &endptr, &res); + g_assert_cmpint(err, ==, 0); + g_assert_cmpfloat(res, ==, 16.0); + g_assert_true(endptr == str + 4); +} + +static void test_qemu_strtod_finite_einval(void) +{ + const char *str; + const char *endptr; + int err; + double res; + + /* empty */ + str = ""; + endptr = "somewhere"; + res = 999; + err = qemu_strtod_finite(str, &endptr, &res); + g_assert_cmpint(err, ==, -EINVAL); + g_assert_cmpfloat(res, ==, 999.0); + g_assert_true(endptr == str); + + /* NULL */ + str = NULL; + endptr = "random"; + res = 999; + err = qemu_strtod_finite(str, &endptr, &res); + g_assert_cmpint(err, ==, -EINVAL); + g_assert_cmpfloat(res, ==, 999.0); + g_assert_null(endptr); + + /* not recognizable */ + str = " junk"; + endptr = "somewhere"; + res = 999; + err = qemu_strtod_finite(str, &endptr, &res); + g_assert_cmpint(err, ==, -EINVAL); + g_assert_cmpfloat(res, ==, 999.0); + g_assert_true(endptr == str); +} + +static void test_qemu_strtod_finite_erange(void) +{ + const char *str; + const char *endptr; + int err; + double res; + + /* overflow */ + str = "9e999"; + endptr = "somewhere"; + res = 999; + err = qemu_strtod_finite(str, &endptr, &res); + g_assert_cmpint(err, ==, -ERANGE); + g_assert_cmpfloat(res, ==, HUGE_VAL); + g_assert_true(endptr == str + 5); + + str = "-9e+999"; + endptr = "somewhere"; + res = 999; + err = qemu_strtod_finite(str, &endptr, &res); + g_assert_cmpint(err, ==, -ERANGE); + g_assert_cmpfloat(res, ==, -HUGE_VAL); + g_assert_true(endptr == str + 7); + + /* underflow */ + str = "-9e-999"; + endptr = "somewhere"; + res = 999; + err = qemu_strtod_finite(str, &endptr, &res); + g_assert_cmpint(err, ==, -ERANGE); + g_assert_cmpfloat(res, >=, -DBL_MIN); + g_assert_cmpfloat(res, <=, -0.0); + g_assert_true(signbit(res)); + g_assert_true(endptr == str + 7); +} + +static void test_qemu_strtod_finite_nonfinite(void) +{ + const char *str; + const char *endptr; + int err; + double res; + + /* infinity */ + str = "inf"; + endptr = "somewhere"; + res = 999; + err = qemu_strtod_finite(str, &endptr, &res); + g_assert_cmpint(err, ==, -EINVAL); + g_assert_cmpfloat(res, ==, 999.0); + g_assert_true(endptr == str); + + str = "-infinity"; + endptr = "somewhere"; + res = 999; + err = qemu_strtod_finite(str, &endptr, &res); + g_assert_cmpint(err, ==, -EINVAL); + g_assert_cmpfloat(res, ==, 999.0); + g_assert_true(endptr == str); + + /* not a number */ + str = " NaN"; + endptr = "somewhere"; + res = 999; + err = qemu_strtod_finite(str, &endptr, &res); + g_assert_cmpint(err, ==, -EINVAL); + g_assert_cmpfloat(res, ==, 999.0); + g_assert_true(endptr == str); +} + +static void test_qemu_strtod_finite_trailing(void) +{ + const char *str; + const char *endptr; + int err; + double res; + + /* trailing whitespace */ + str = "1. "; + endptr = "somewhere"; + res = 999; + err = qemu_strtod_finite(str, &endptr, &res); + g_assert_cmpint(err, ==, 0); + g_assert_cmpfloat(res, ==, 1.0); + g_assert_true(endptr == str + 2); + + endptr = "somewhere"; + res = 999; + err = qemu_strtod_finite(str, NULL, &res); + g_assert_cmpint(err, ==, -EINVAL); + g_assert_cmpfloat(res, ==, 999.0); + + /* trailing e is not an exponent */ + str = ".5e"; + endptr = "somewhere"; + res = 999; + err = qemu_strtod_finite(str, &endptr, &res); + g_assert_cmpint(err, ==, 0); + g_assert_cmpfloat(res, ==, 0.5); + g_assert_true(endptr == str + 2); + + endptr = "somewhere"; + res = 999; + err = qemu_strtod_finite(str, NULL, &res); + g_assert_cmpint(err, ==, -EINVAL); + g_assert_cmpfloat(res, ==, 999.0); + + /* trailing ( not part of long NaN */ + str = "nan("; + endptr = "somewhere"; + res = 999; + err = qemu_strtod_finite(str, &endptr, &res); + g_assert_cmpint(err, ==, -EINVAL); + g_assert_cmpfloat(res, ==, 999.0); + g_assert_true(endptr == str); + + endptr = "somewhere"; + res = 999; + err = qemu_strtod_finite(str, NULL, &res); + g_assert_cmpint(err, ==, -EINVAL); + g_assert_cmpfloat(res, ==, 999.0); +} + +static void test_qemu_strtod_finite_erange_junk(void) +{ + const char *str; + const char *endptr; + int err; + double res; + + /* ERANGE with trailing junk... */ + str = "1e-999junk"; + endptr = "somewhere"; + res = 999; + err = qemu_strtod_finite(str, &endptr, &res); + g_assert_cmpint(err, ==, -ERANGE); + g_assert_cmpfloat(res, <=, DBL_MIN); + g_assert_cmpfloat(res, >=, 0.0); + g_assert_false(signbit(res)); + g_assert_true(endptr == str + 6); + + /* ...has less priority than EINVAL when full parse not possible */ + endptr = "somewhere"; + res = 999; + err = qemu_strtod_finite(str, NULL, &res); + g_assert_cmpint(err, ==, -EINVAL); + g_assert_cmpfloat(res, ==, 999.0); +} + static void test_qemu_strtosz_simple(void) { const char *str; @@ -3631,6 +4114,35 @@ int main(int argc, char **argv) g_test_add_func("/cutils/qemu_strtou64_full/erange_junk", test_qemu_strtou64_full_erange_junk); + /* qemu_strtod() tests */ + g_test_add_func("/cutils/qemu_strtod/simple", + test_qemu_strtod_simple); + g_test_add_func("/cutils/qemu_strtod/einval", + test_qemu_strtod_einval); + g_test_add_func("/cutils/qemu_strtod/erange", + test_qemu_strtod_erange); + g_test_add_func("/cutils/qemu_strtod/nonfinite", + test_qemu_strtod_nonfinite); + g_test_add_func("/cutils/qemu_strtod/trailing", + test_qemu_strtod_trailing); + g_test_add_func("/cutils/qemu_strtod/erange_junk", + test_qemu_strtod_erange_junk); + + /* qemu_strtod_finite() tests */ + g_test_add_func("/cutils/qemu_strtod_finite/simple", + test_qemu_strtod_finite_simple); + g_test_add_func("/cutils/qemu_strtod_finite/einval", + test_qemu_strtod_finite_einval); + g_test_add_func("/cutils/qemu_strtod_finite/erange", + test_qemu_strtod_finite_erange); + g_test_add_func("/cutils/qemu_strtod_finite/nonfinite", + test_qemu_strtod_finite_nonfinite); + g_test_add_func("/cutils/qemu_strtod_finite/trailing", + test_qemu_strtod_finite_trailing); + g_test_add_func("/cutils/qemu_strtod_finite/erange_junk", + test_qemu_strtod_finite_erange_junk); + + /* qemu_strtosz() tests */ g_test_add_func("/cutils/strtosz/simple", test_qemu_strtosz_simple); g_test_add_func("/cutils/strtosz/hex",