From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([140.186.70.92]:37602) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Rq12X-0003h7-ET for qemu-devel@nongnu.org; Wed, 25 Jan 2012 06:29:26 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Rq12S-0000e4-BV for qemu-devel@nongnu.org; Wed, 25 Jan 2012 06:29:21 -0500 Received: from mx1.redhat.com ([209.132.183.28]:7774) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Rq12S-0000dv-4p for qemu-devel@nongnu.org; Wed, 25 Jan 2012 06:29:16 -0500 From: Orit Wasserman Date: Wed, 25 Jan 2012 13:26:40 +0200 Message-Id: <1327490809-21393-3-git-send-email-owasserm@redhat.com> In-Reply-To: <1327490809-21393-1-git-send-email-owasserm@redhat.com> References: <1327490809-21393-1-git-send-email-owasserm@redhat.com> Subject: [Qemu-devel] [PATCH v6 02/11] Add uleb encoding/decoding functions List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: blauwirbel@gmail.com, stefanha@gmail.com, Orit Wasserman , avi@redhat.com, quintela@redhat.com Implement Unsigned Little Endian Base 128. Signed-off-by: Orit Wasserman --- migration.h | 4 ++++ savevm.c | 26 ++++++++++++++++++++++++++ 2 files changed, 30 insertions(+), 0 deletions(-) diff --git a/migration.h b/migration.h index 372b066..50dec18 100644 --- a/migration.h +++ b/migration.h @@ -95,4 +95,8 @@ void migrate_add_blocker(Error *reason); */ void migrate_del_blocker(Error *reason); +/* ULEB128 */ +int uleb128_encode_small(uint8_t *out, uint32_t n); +int uleb128_decode_small(const uint8 *in, uint32_t *n); + #endif diff --git a/savevm.c b/savevm.c index 80be1ff..304db31 100644 --- a/savevm.c +++ b/savevm.c @@ -2297,3 +2297,29 @@ void vmstate_register_ram_global(MemoryRegion *mr) { vmstate_register_ram(mr, NULL); } + +/* ULEB128 */ +int uleb128_encode_small(uint8_t *out, uint32_t n) +{ + if (n < 0x80) { + *out++ = n; + return 1; + } else { + *out++ = (n & 0x7f) | 0x80; + *out++ = n >> 7; + } + return 0; +} + +int uleb128_decode_small(const uint8 *in, uint32_t *n) +{ + if (!(*in & 0x80)) { + *n = *in++; + return 1; + } else { + *n = *in++ & 0x7f; + *n |= *in++ << 7; + return 0; + } +} + -- 1.7.6.5