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[83.53.161.74]) by smtp.gmail.com with ESMTPSA id y6sm9007187wrn.41.2020.09.27.02.08.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 27 Sep 2020 02:08:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=gSWJZnKhOrC53eEU7BCKaT5VT2GqivKC/fTv2rJCfmw=; b=X5WvMunjUsLtd2mptGhZleNmCFMuZ4w7XejQhfK2oyhGIpeC+BchQD4w8YwsF/wILH O1nqo6JcAGIOORTxzHo5WsaA0XONqTOTA77relREpEfXsje6Xh/qrtVEgbwLnDxkNkye begFE2y963So5IYztpwkv5z5D2bn2JKEM2M2eOcvr5E+lIzd+wx1maz/F1ftgan9uRv+ ysv3cEECIW2LnX6eME5yeKwE+Pxf+ZPoFIc6mtuVgsj3lUq04a09uvFpT/K6nIEv7axG stzyQkPIfoxXe9NXt8IhgG6tytG+SYx61SL29sxSVmI0zi9lJ9WLdJdXfz6PMd7ibMuz 3JRA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:from:to:cc:subject:date:message-id :in-reply-to:references:mime-version:content-transfer-encoding; bh=gSWJZnKhOrC53eEU7BCKaT5VT2GqivKC/fTv2rJCfmw=; b=FYDQEDVU2QXmV8KYNXetFHuahpsQo7Us6479AQHBft7dVbHJVHxRi/WNfZe5nb6oHK xU1Rrpm6dP91XiP79gRDjQLevoLxnL5r9lXOeHboIbtazpW/ElmEVWmkIhZot0u+imOD Hv1vUG/sT1MykCnGWV1t4+wHGOyHFPkc+BRX8r1YGU0c1047ifA5QcjcyVO92GGxHND1 YS94NamtJyVYoQ/Ldbqb+v40QJ/0jb7vt0M3ZBITYSn+0ksbyXg955PkpN90aZGA8VxN jhnRSPYRbbIipw7Tzyljh4JPci3tMmFQEt4i/YBzPhjFbSl/SsmaFN+ntvU5x43etMuP ZECw== X-Gm-Message-State: AOAM532zxEb2iW2w/K+yKxZ2q66W9NGJInNnmKdnZZWHC9kGk2Op9z2z 6UVUPs4idfjBKOVxzK0JHcA= X-Google-Smtp-Source: ABdhPJwGxE71rID2mFA3DEuK+vzDWzKrydocZuPZ2wGQitxZ8AgaDXRVy2kjMCPnlkwSvJiegrpvew== X-Received: by 2002:a1c:7911:: with SMTP id l17mr6084925wme.179.1601197703999; Sun, 27 Sep 2020 02:08:23 -0700 (PDT) Sender: =?UTF-8?Q?Philippe_Mathieu=2DDaud=C3=A9?= From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= To: qemu-devel@nongnu.org Cc: Tyrone Ting , Alistair Francis , Eduardo Habkost , Luc Michel , Damien Hedde , "Edgar E . Iglesias" , Havard Skinnemoen , Peter Maydell , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Subject: [PATCH 1/3] util/cutils: Introduce freq_to_str() to display Hertz units Date: Sun, 27 Sep 2020 11:08:18 +0200 Message-Id: <20200927090820.61859-2-f4bug@amsat.org> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200927090820.61859-1-f4bug@amsat.org> References: <20200927090820.61859-1-f4bug@amsat.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-ZohoMail-DKIM: pass (identity @gmail.com) Introduce freq_to_str() to convert frequency values in human friendly units using the SI units for Hertz. Signed-off-by: Philippe Mathieu-Daud=C3=A9 --- include/qemu/cutils.h | 12 ++++++++++++ util/cutils.c | 10 ++++++++++ 2 files changed, 22 insertions(+) diff --git a/include/qemu/cutils.h b/include/qemu/cutils.h index eb59852dfdf..0186c846e9c 100644 --- a/include/qemu/cutils.h +++ b/include/qemu/cutils.h @@ -158,6 +158,18 @@ int qemu_strtosz_metric(const char *nptr, const char *= *end, uint64_t *result); =20 char *size_to_str(uint64_t val); =20 +/** + * freq_to_str: + * @freq_hz: frequency to stringify + * + * Return human readable string for frequency @freq_hz. + * Use SI units like KHz, MHz, and so forth. + * + * The caller is responsible for releasing the value returned with g_free() + * after use. + */ +char *freq_to_str(uint64_t freq_hz); + /* used to print char* safely */ #define STR_OR_NULL(str) ((str) ? (str) : "null") =20 diff --git a/util/cutils.c b/util/cutils.c index 36ce712271f..dab837fd8b8 100644 --- a/util/cutils.c +++ b/util/cutils.c @@ -885,6 +885,16 @@ char *size_to_str(uint64_t val) return g_strdup_printf("%0.3g %sB", (double)val / div, suffixes[i]); } =20 +char *freq_to_str(uint64_t freq_hz) +{ + static const char *suffixes[] =3D { "", "K", "M", "G", "T", "P", "E" }; + unsigned unit_index =3D log10(freq_hz) / 3; + + return g_strdup_printf("%0.3g %sHz", + freq_hz / pow(10.0, unit_index * 3.0), + suffixes[unit_index]); +} + int qemu_pstrcmp0(const char **str1, const char **str2) { return g_strcmp0(*str1, *str2); --=20 2.26.2