Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750937AbWEQSwi (ORCPT ); Wed, 17 May 2006 14:52:38 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750928AbWEQSwi (ORCPT ); Wed, 17 May 2006 14:52:38 -0400 Received: from mtagate6.de.ibm.com ([195.212.29.155]:21354 "EHLO mtagate6.de.ibm.com") by vger.kernel.org with ESMTP id S1750811AbWEQSwh (ORCPT ); Wed, 17 May 2006 14:52:37 -0400 Subject: [RFC] [Patch 2/6] statistics infrastructure - prerequisite: parser enhancement From: Martin Peschke To: "linux-kernel@vger.kernel.org" Cc: Chase Venters , Nick Piggin , Keith Owens , Andrew Morton , Christoph Lameter , "Frank Ch. Eigler" , Peter Chubb , "hch@infradead.org" , "arjan@infradead.org" , "ak@suse.de" Content-Type: text/plain Date: Wed, 17 May 2006 20:52:25 +0200 Message-Id: <1147891945.3076.14.camel@dyn-9-152-230-71.boeblingen.de.ibm.com> Mime-Version: 1.0 X-Mailer: Evolution 2.2.3 (2.2.3-4.fc4) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2288 Lines: 69 This patch adds a match_* derivate for 64 bit operands to the parser library. Signed-off-by: Martin Peschke --- include/linux/parser.h | 1 + lib/parser.c | 30 ++++++++++++++++++++++++++++++ 2 files changed, 31 insertions(+) diff -Nurp a/lib/parser.c b/lib/parser.c --- a/lib/parser.c 2006-03-20 06:53:29.000000000 +0100 +++ b/lib/parser.c 2006-05-17 19:11:32.000000000 +0200 @@ -140,6 +140,35 @@ static int match_number(substring_t *s, } /** + * match_s64: scan a number in the given base from a substring_t + * @s: substring to be scanned + * @result: resulting integer on success + * @base: base to use when converting string + * + * Description: Given a &substring_t and a base, attempts to parse the substring + * as a number in that base. On success, sets @result to the s64 represented + * by the string and returns 0. Returns either -ENOMEM or -EINVAL on failure. + */ +int match_s64(substring_t *s, s64 *result, int base) +{ + char *endp; + char *buf; + int ret; + + buf = kmalloc(s->to - s->from + 1, GFP_KERNEL); + if (!buf) + return -ENOMEM; + memcpy(buf, s->from, s->to - s->from); + buf[s->to - s->from] = '\0'; + *result = simple_strtoll(buf, &endp, base); + ret = 0; + if (endp == buf) + ret = -EINVAL; + kfree(buf); + return ret; +} + +/** * match_int: - scan a decimal representation of an integer from a substring_t * @s: substring_t to be scanned * @result: resulting integer on success @@ -218,3 +247,4 @@ EXPORT_SYMBOL(match_octal); EXPORT_SYMBOL(match_hex); EXPORT_SYMBOL(match_strcpy); EXPORT_SYMBOL(match_strdup); +EXPORT_SYMBOL(match_s64); diff -Nurp a/include/linux/parser.h b/include/linux/parser.h --- a/include/linux/parser.h 2006-03-20 06:53:29.000000000 +0100 +++ b/include/linux/parser.h 2006-05-17 19:11:32.000000000 +0200 @@ -31,3 +31,4 @@ int match_octal(substring_t *, int *resu int match_hex(substring_t *, int *result); void match_strcpy(char *, substring_t *); char *match_strdup(substring_t *); +int match_s64(substring_t *, s64 *result, int); - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/