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// SPDX-License-Identifier: GPL-2.0-only
/*
* tools/testing/selftests/kvm/lib/test_util.c
*
* Copyright (C) 2020, Google LLC.
*/
#include <stdlib.h>
#include <ctype.h>
#include <limits.h>
#include <assert.h>
#include "test_util.h"
/*
* Parses "[0-9]+[kmgt]?".
*/
size_t parse_size(const char *size)
{
size_t base;
char *scale;
int shift = 0;
TEST_ASSERT(size && isdigit(size[0]), "Need at least one digit in '%s'", size);
base = strtoull(size, &scale, 0);
TEST_ASSERT(base != ULLONG_MAX, "Overflow parsing size!");
switch (tolower(*scale)) {
case 't':
shift = 40;
break;
case 'g':
shift = 30;
break;
case 'm':
shift = 20;
break;
case 'k':
shift = 10;
break;
case 'b':
case '\0':
shift = 0;
break;
default:
TEST_ASSERT(false, "Unknown size letter %c", *scale);
}
TEST_ASSERT((base << shift) >> shift == base, "Overflow scaling size!");
return base << shift;
}
int64_t timespec_to_ns(struct timespec ts)
{
return (int64_t)ts.tv_nsec + 1000000000LL * (int64_t)ts.tv_sec;
}
struct timespec timespec_diff(struct timespec start, struct timespec end)
{
struct timespec temp;
if ((end.tv_nsec - start.tv_nsec) < 0) {
temp.tv_sec = end.tv_sec - start.tv_sec - 1;
temp.tv_nsec = 1000000000LL + end.tv_nsec - start.tv_nsec;
} else {
temp.tv_sec = end.tv_sec - start.tv_sec;
temp.tv_nsec = end.tv_nsec - start.tv_nsec;
}
return temp;
}
struct timespec timespec_add_ns(struct timespec ts, int64_t ns)
{
struct timespec res;
res.tv_sec = ts.tv_sec;
res.tv_nsec = ts.tv_nsec + ns;
if (res.tv_nsec > 1000000000UL) {
res.tv_sec += 1;
res.tv_nsec -= 1000000000UL;
}
return res;
}
void print_skip(const char *fmt, ...)
{
va_list ap;
assert(fmt);
va_start(ap, fmt);
vprintf(fmt, ap);
va_end(ap);
puts(", skipping test");
}
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