From patchwork Fri Sep 25 09:10:54 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Laurent Vivier X-Patchwork-Id: 304441 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BD80AC4727F for ; Fri, 25 Sep 2020 09:12:29 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 1930C206B5 for ; Fri, 25 Sep 2020 09:12:29 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="Z2aFztUG" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1930C206B5 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:38268 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kLjmG-0005CT-6R for qemu-devel@archiver.kernel.org; Fri, 25 Sep 2020 05:12:28 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:56792) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kLjl3-000404-F1 for qemu-devel@nongnu.org; Fri, 25 Sep 2020 05:11:13 -0400 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:45555) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1kLjl1-0007ss-RE for qemu-devel@nongnu.org; Fri, 25 Sep 2020 05:11:13 -0400 Dkim-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1601025070; 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=le/AFLjMKIUwwPTP9MPoIbrqeSSlGtYNtRO3yJzdnUk=; b=Z2aFztUGX/vELKVrV9dR+A7WBBqFSOx+IE6Vr3VBqywCYH8kkah+6iI4lrtPKDLwof6JqS lBhRPeXPHM+1Vp0CbSgyM9LkCjRwYfh2iC1aFoyMuozBwtdMQQMkMfZXui8JLa/L2JSSFU nF+KfWJnRnjmY7wpcjQOFIMqmFApTS8= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-346-mmIcUKKIMjuh8VWTM8yC4w-1; Fri, 25 Sep 2020 05:11:08 -0400 X-MC-Unique: mmIcUKKIMjuh8VWTM8yC4w-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id E61A1800597 for ; Fri, 25 Sep 2020 09:11:07 +0000 (UTC) Received: from thinkpad.redhat.com (ovpn-112-16.ams2.redhat.com [10.36.112.16]) by smtp.corp.redhat.com (Postfix) with ESMTP id 3482E1002C0F; Fri, 25 Sep 2020 09:11:05 +0000 (UTC) From: Laurent Vivier To: qemu-devel@nongnu.org Subject: [PATCH v3 1/2] util/hexdump: introduce qemu_hexdump_line() Date: Fri, 25 Sep 2020 11:10:54 +0200 Message-Id: <20200925091055.186023-2-lvivier@redhat.com> In-Reply-To: <20200925091055.186023-1-lvivier@redhat.com> References: <20200925091055.186023-1-lvivier@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=lvivier@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=63.128.21.124; envelope-from=lvivier@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/25 01:07:33 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -32 X-Spam_score: -3.3 X-Spam_bar: --- X-Spam_report: (-3.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.199, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action 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: Laurent Vivier , Cindy Lu , "Michael S . Tsirkin" , Jason Wang , Stefan Hajnoczi , =?utf-8?q?Philippe_Mathieu-Dau?= =?utf-8?b?ZMOp?= Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Dumping one line of hexadecimal/ASCII from a buffer is often needed. Move this part from qemu_hexdump() and use it Acked-by: Stefan Hajnoczi Signed-off-by: Laurent Vivier --- include/qemu-common.h | 8 +++++++ util/hexdump.c | 54 +++++++++++++++++++++++++++---------------- 2 files changed, 42 insertions(+), 20 deletions(-) diff --git a/include/qemu-common.h b/include/qemu-common.h index 9cfd62669bf8..cc902b690db3 100644 --- a/include/qemu-common.h +++ b/include/qemu-common.h @@ -134,6 +134,14 @@ void os_setup_early_signal_handling(void); char *os_find_datadir(void); int os_parse_cmd_args(int index, const char *optarg); +/* + * Hexdump a line of a byte buffer into a hexadecimal/ASCII buffer + */ +#define QEMU_HEXDUMP_LINE_BYTES 16 /* Number of bytes to dump */ +#define QEMU_HEXDUMP_LINE_LEN 75 /* Number of characters in line */ +void qemu_hexdump_line(char *line, unsigned int b, const void *bufptr, + unsigned int len, bool ascii); + /* * Hexdump a buffer to a file. An optional string prefix is added to every line */ diff --git a/util/hexdump.c b/util/hexdump.c index 0b4662e701d8..2c105a884620 100644 --- a/util/hexdump.c +++ b/util/hexdump.c @@ -16,36 +16,50 @@ #include "qemu/osdep.h" #include "qemu-common.h" -void qemu_hexdump(FILE *fp, const char *prefix, - const void *bufptr, size_t size) +void qemu_hexdump_line(char *line, unsigned int b, const void *bufptr, + unsigned int len, bool ascii) { const char *buf = bufptr; - unsigned int b, len, i, c; + int i, c; - for (b = 0; b < size; b += 16) { - len = size - b; - if (len > 16) { - len = 16; + if (len > QEMU_HEXDUMP_LINE_BYTES) { + len = QEMU_HEXDUMP_LINE_BYTES; + } + + line += snprintf(line, 6, "%04x:", b); + for (i = 0; i < QEMU_HEXDUMP_LINE_BYTES; i++) { + if ((i % 4) == 0) { + *line++ = ' '; } - fprintf(fp, "%s: %04x:", prefix, b); - for (i = 0; i < 16; i++) { - if ((i % 4) == 0) { - fprintf(fp, " "); - } - if (i < len) { - fprintf(fp, " %02x", (unsigned char)buf[b + i]); - } else { - fprintf(fp, " "); - } + if (i < len) { + line += sprintf(line, " %02x", (unsigned char)buf[b + i]); + } else { + line += sprintf(line, " "); } - fprintf(fp, " "); + } + if (ascii) { + *line++ = ' '; for (i = 0; i < len; i++) { c = buf[b + i]; if (c < ' ' || c > '~') { c = '.'; } - fprintf(fp, "%c", c); + *line++ = c; } - fprintf(fp, "\n"); } + *line = '\0'; +} + +void qemu_hexdump(FILE *fp, const char *prefix, + const void *bufptr, size_t size) +{ + unsigned int b, len; + char line[QEMU_HEXDUMP_LINE_LEN]; + + for (b = 0; b < size; b += QEMU_HEXDUMP_LINE_BYTES) { + len = size - b; + qemu_hexdump_line(line, b, bufptr, len, true); + fprintf(fp, "%s: %s\n", prefix, line); + } + }