From patchwork Thu Sep 12 05:36:28 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tao Xu X-Patchwork-Id: 1161364 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=intel.com 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 ozlabs.org (Postfix) with ESMTPS id 46TSGX3Nwkz9s4Y for ; Thu, 12 Sep 2019 15:37:54 +1000 (AEST) Received: from localhost ([::1]:58208 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i8Hni-0003W2-3Z for incoming@patchwork.ozlabs.org; Thu, 12 Sep 2019 01:37:50 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:56508) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i8Hmt-0003TA-IO for qemu-devel@nongnu.org; Thu, 12 Sep 2019 01:37:00 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1i8Hmq-0002vf-K4 for qemu-devel@nongnu.org; Thu, 12 Sep 2019 01:36:58 -0400 Received: from mga11.intel.com ([192.55.52.93]:18593) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1i8Hmo-0002tG-NP for qemu-devel@nongnu.org; Thu, 12 Sep 2019 01:36:56 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga102.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 11 Sep 2019 22:36:45 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.64,495,1559545200"; d="scan'208";a="186030745" Received: from tao-optiplex-7060.sh.intel.com ([10.239.159.36]) by fmsmga007.fm.intel.com with ESMTP; 11 Sep 2019 22:36:44 -0700 From: Tao Xu To: imammedo@redhat.com, eblake@redhat.com, ehabkost@redhat.com Date: Thu, 12 Sep 2019 13:36:28 +0800 Message-Id: <20190912053638.4858-2-tao3.xu@intel.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190912053638.4858-1-tao3.xu@intel.com> References: <20190912053638.4858-1-tao3.xu@intel.com> MIME-Version: 1.0 X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 192.55.52.93 Subject: [Qemu-devel] [PATCH v11 01/11] util/cutils: Add qemu_strtotime_ps() X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: jingqi.liu@intel.com, tao3.xu@intel.com, fan.du@intel.com, qemu-devel@nongnu.org, jonathan.cameron@huawei.com, dan.j.williams@intel.com Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" To convert strings with time suffixes to numbers, support time unit are "ps" for picosecond, "ns" for nanosecond, "us" for microsecond, "ms" for millisecond or "s" for second. Signed-off-by: Tao Xu --- No changes in v11. New patch in v10. --- include/qemu/cutils.h | 1 + util/cutils.c | 82 +++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 83 insertions(+) diff --git a/include/qemu/cutils.h b/include/qemu/cutils.h index 12301340a4..0e70a807e1 100644 --- a/include/qemu/cutils.h +++ b/include/qemu/cutils.h @@ -180,5 +180,6 @@ int uleb128_decode_small(const uint8_t *in, uint32_t *n); * *str1 is <, == or > than *str2. */ int qemu_pstrcmp0(const char **str1, const char **str2); +int qemu_strtotime_ps(const char *nptr, const char **end, uint64_t *result); #endif diff --git a/util/cutils.c b/util/cutils.c index fd591cadf0..a50c15f46a 100644 --- a/util/cutils.c +++ b/util/cutils.c @@ -847,3 +847,85 @@ int qemu_pstrcmp0(const char **str1, const char **str2) { return g_strcmp0(*str1, *str2); } + +static int64_t timeunit_mul(const char *unitstr) +{ + if (g_strcmp0(unitstr, "ps") == 0) { + return 1; + } else if (g_strcmp0(unitstr, "ns") == 0) { + return 1000; + } else if (g_strcmp0(unitstr, "us") == 0) { + return 1000000; + } else if (g_strcmp0(unitstr, "ms") == 0) { + return 1000000000LL; + } else if (g_strcmp0(unitstr, "s") == 0) { + return 1000000000000LL; + } else { + return -1; + } +} + + +/* + * Convert string to time, support time unit are ps for picosecond, + * ns for nanosecond, us for microsecond, ms for millisecond or s for second. + * End pointer will be returned in *end, if not NULL. Return -ERANGE on + * overflow, and -EINVAL on other error. + */ +static int do_strtotime(const char *nptr, const char **end, + const char *default_unit, uint64_t *result) +{ + int retval; + const char *endptr; + int mul_required = 0; + int64_t mul; + double val, integral, fraction; + + retval = qemu_strtod_finite(nptr, &endptr, &val); + if (retval) { + goto out; + } + fraction = modf(val, &integral); + if (fraction != 0) { + mul_required = 1; + } + + mul = timeunit_mul(endptr); + + if (mul == 1000000000000LL) { + endptr++; + } else if (mul != -1) { + endptr += 2; + } else { + mul = timeunit_mul(default_unit); + assert(mul >= 0); + } + if (mul == 1 && mul_required) { + retval = -EINVAL; + goto out; + } + /* + * Values >= 0xfffffffffffffc00 overflow uint64_t after their trip + * through double (53 bits of precision). + */ + if ((val * (double)mul >= 0xfffffffffffffc00) || val < 0) { + retval = -ERANGE; + goto out; + } + *result = val * (double)mul; + retval = 0; + +out: + if (end) { + *end = endptr; + } else if (*endptr) { + retval = -EINVAL; + } + + return retval; +} + +int qemu_strtotime_ps(const char *nptr, const char **end, uint64_t *result) +{ + return do_strtotime(nptr, end, "ps", result); +}