mirror of
https://github.com/xemu-project/xemu.git
synced 2024-12-13 14:36:08 +00:00
a8d2532645
No header includes qemu-common.h after this commit, as prescribed by qemu-common.h's file comment. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20190523143508.25387-5-armbru@redhat.com> [Rebased with conflicts resolved automatically, except for include/hw/arm/xlnx-zynqmp.h hw/arm/nrf51_soc.c hw/arm/msf2-soc.c block/qcow2-refcount.c block/qcow2-cluster.c block/qcow2-cache.c target/arm/cpu.h target/lm32/cpu.h target/m68k/cpu.h target/mips/cpu.h target/moxie/cpu.h target/nios2/cpu.h target/openrisc/cpu.h target/riscv/cpu.h target/tilegx/cpu.h target/tricore/cpu.h target/unicore32/cpu.h target/xtensa/cpu.h; bsd-user/main.c and net/tap-bsd.c fixed up]
119 lines
3.1 KiB
C
119 lines
3.1 KiB
C
/*
|
|
* QEMU UUID functions
|
|
*
|
|
* Copyright 2016 Red Hat, Inc.
|
|
*
|
|
* Authors:
|
|
* Fam Zheng <famz@redhat.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the Free
|
|
* Software Foundation; either version 2 of the License, or (at your option)
|
|
* any later version.
|
|
*
|
|
*/
|
|
|
|
#include "qemu/osdep.h"
|
|
#include "qemu/uuid.h"
|
|
#include "qemu/bswap.h"
|
|
|
|
void qemu_uuid_generate(QemuUUID *uuid)
|
|
{
|
|
int i;
|
|
uint32_t tmp[4];
|
|
|
|
QEMU_BUILD_BUG_ON(sizeof(QemuUUID) != 16);
|
|
|
|
for (i = 0; i < 4; ++i) {
|
|
tmp[i] = g_random_int();
|
|
}
|
|
memcpy(uuid, tmp, sizeof(tmp));
|
|
/* Set the two most significant bits (bits 6 and 7) of the
|
|
clock_seq_hi_and_reserved to zero and one, respectively. */
|
|
uuid->data[8] = (uuid->data[8] & 0x3f) | 0x80;
|
|
/* Set the four most significant bits (bits 12 through 15) of the
|
|
time_hi_and_version field to the 4-bit version number.
|
|
*/
|
|
uuid->data[6] = (uuid->data[6] & 0xf) | 0x40;
|
|
}
|
|
|
|
int qemu_uuid_is_null(const QemuUUID *uu)
|
|
{
|
|
static QemuUUID null_uuid;
|
|
return qemu_uuid_is_equal(uu, &null_uuid);
|
|
}
|
|
|
|
int qemu_uuid_is_equal(const QemuUUID *lhv, const QemuUUID *rhv)
|
|
{
|
|
return memcmp(lhv, rhv, sizeof(QemuUUID)) == 0;
|
|
}
|
|
|
|
void qemu_uuid_unparse(const QemuUUID *uuid, char *out)
|
|
{
|
|
const unsigned char *uu = &uuid->data[0];
|
|
snprintf(out, UUID_FMT_LEN + 1, UUID_FMT,
|
|
uu[0], uu[1], uu[2], uu[3], uu[4], uu[5], uu[6], uu[7],
|
|
uu[8], uu[9], uu[10], uu[11], uu[12], uu[13], uu[14], uu[15]);
|
|
}
|
|
|
|
char *qemu_uuid_unparse_strdup(const QemuUUID *uuid)
|
|
{
|
|
const unsigned char *uu = &uuid->data[0];
|
|
return g_strdup_printf(UUID_FMT,
|
|
uu[0], uu[1], uu[2], uu[3], uu[4], uu[5], uu[6],
|
|
uu[7], uu[8], uu[9], uu[10], uu[11], uu[12],
|
|
uu[13], uu[14], uu[15]);
|
|
}
|
|
|
|
static bool qemu_uuid_is_valid(const char *str)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < strlen(str); i++) {
|
|
const char c = str[i];
|
|
if (i == 8 || i == 13 || i == 18 || i == 23) {
|
|
if (str[i] != '-') {
|
|
return false;
|
|
}
|
|
} else {
|
|
if ((c >= '0' && c <= '9') ||
|
|
(c >= 'A' && c <= 'F') ||
|
|
(c >= 'a' && c <= 'f')) {
|
|
continue;
|
|
}
|
|
return false;
|
|
}
|
|
}
|
|
return i == 36;
|
|
}
|
|
|
|
int qemu_uuid_parse(const char *str, QemuUUID *uuid)
|
|
{
|
|
unsigned char *uu = &uuid->data[0];
|
|
int ret;
|
|
|
|
if (!qemu_uuid_is_valid(str)) {
|
|
return -1;
|
|
}
|
|
|
|
ret = sscanf(str, UUID_FMT, &uu[0], &uu[1], &uu[2], &uu[3],
|
|
&uu[4], &uu[5], &uu[6], &uu[7], &uu[8], &uu[9],
|
|
&uu[10], &uu[11], &uu[12], &uu[13], &uu[14],
|
|
&uu[15]);
|
|
|
|
if (ret != 16) {
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* Swap from UUID format endian (BE) to the opposite or vice versa.
|
|
*/
|
|
QemuUUID qemu_uuid_bswap(QemuUUID uuid)
|
|
{
|
|
bswap32s(&uuid.fields.time_low);
|
|
bswap16s(&uuid.fields.time_mid);
|
|
bswap16s(&uuid.fields.time_high_and_version);
|
|
return uuid;
|
|
}
|