From nobody Wed Nov 12 02:10:07 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=intel.com ARC-Seal: i=1; a=rsa-sha256; t=1567347887; cv=none; d=zoho.com; s=zohoarc; b=Q4WeHgQPURHEEoh/N5lvQOtOrTZnjPHQV2u5Avo70RmKq4iMWNX4kfrAwB8i1tYGicngEGsdbVyz00M1ozL5ceaKop3Vg3YNlr23x2Toar8I9GpCt37MgaMyLCtAB5oaGhQIhQnc0p9n36F3EdF9BDcN2QFUgGzXXAe1pIq8A80= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1567347887; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To:ARC-Authentication-Results; bh=lJC6xYxEojUTL+B0LvcdqwWZq9i8086b4ez6XO43Kmo=; b=FszY3zfx9Vcx+kG/+uZ9fZR5STGhEhBIz8ttWBrjcuChjmfjvlPELoazYlsqotMGQrzbC0Y2hngTo2naiYZXVacRNr2G5QGoaLDNmr/cHxpgLeDkKQAY0NbHA8q7F1Ex7DYPY757YidYIj/Wc4qspuRHovej4M2PJ7VsVC7jG5k= ARC-Authentication-Results: i=1; mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1567347887201120.24062404430128; Sun, 1 Sep 2019 07:24:47 -0700 (PDT) Received: from localhost ([::1]:57746 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i4QmS-00065e-2V for importer@patchew.org; Sun, 01 Sep 2019 10:24:36 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:39443) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i4QjS-0004SO-AO for qemu-devel@nongnu.org; Sun, 01 Sep 2019 10:21:31 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1i4QjQ-0004Z5-AW for qemu-devel@nongnu.org; Sun, 01 Sep 2019 10:21:29 -0400 Received: from mga12.intel.com ([192.55.52.136]:16710) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1i4QjQ-0004WR-3E for qemu-devel@nongnu.org; Sun, 01 Sep 2019 10:21:28 -0400 Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga106.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 01 Sep 2019 07:21:25 -0700 Received: from tao-optiplex-7060.sh.intel.com ([10.239.159.36]) by fmsmga002.fm.intel.com with ESMTP; 01 Sep 2019 07:21:24 -0700 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.64,455,1559545200"; d="scan'208";a="211453071" From: Tao Xu To: imammedo@redhat.com, eblake@redhat.com, ehabkost@redhat.com Date: Sun, 1 Sep 2019 22:21:09 +0800 Message-Id: <20190901142119.20482-2-tao3.xu@intel.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190901142119.20482-1-tao3.xu@intel.com> References: <20190901142119.20482-1-tao3.xu@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 192.55.52.136 Subject: [Qemu-devel] [PATCH v10 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, daniel@linux.ibm.com, jonathan.cameron@huawei.com, dan.j.williams@intel.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" 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 --- 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 <, =3D=3D 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= ); =20 #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") =3D=3D 0) { + return 1; + } else if (g_strcmp0(unitstr, "ns") =3D=3D 0) { + return 1000; + } else if (g_strcmp0(unitstr, "us") =3D=3D 0) { + return 1000000; + } else if (g_strcmp0(unitstr, "ms") =3D=3D 0) { + return 1000000000LL; + } else if (g_strcmp0(unitstr, "s") =3D=3D 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 seco= nd. + * 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 =3D 0; + int64_t mul; + double val, integral, fraction; + + retval =3D qemu_strtod_finite(nptr, &endptr, &val); + if (retval) { + goto out; + } + fraction =3D modf(val, &integral); + if (fraction !=3D 0) { + mul_required =3D 1; + } + + mul =3D timeunit_mul(endptr); + + if (mul =3D=3D 1000000000000LL) { + endptr++; + } else if (mul !=3D -1) { + endptr +=3D 2; + } else { + mul =3D timeunit_mul(default_unit); + assert(mul >=3D 0); + } + if (mul =3D=3D 1 && mul_required) { + retval =3D -EINVAL; + goto out; + } + /* + * Values >=3D 0xfffffffffffffc00 overflow uint64_t after their trip + * through double (53 bits of precision). + */ + if ((val * (double)mul >=3D 0xfffffffffffffc00) || val < 0) { + retval =3D -ERANGE; + goto out; + } + *result =3D val * (double)mul; + retval =3D 0; + +out: + if (end) { + *end =3D endptr; + } else if (*endptr) { + retval =3D -EINVAL; + } + + return retval; +} + +int qemu_strtotime_ps(const char *nptr, const char **end, uint64_t *result) +{ + return do_strtotime(nptr, end, "ps", result); +} --=20 2.20.1