// SPDX-License-Identifier: GPL-2.0-only
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/*
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* tools/testing/selftests/kvm/lib/test_util.c
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*
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* Copyright (C) 2020, Google LLC.
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*/
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#include <assert.h>
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#include <ctype.h>
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#include <limits.h>
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#include <stdlib.h>
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#include <time.h>
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#include "test_util.h"
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/*
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* Parses "[0-9]+[kmgt]?".
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*/
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size_t parse_size(const char *size)
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{
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size_t base;
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char *scale;
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int shift = 0;
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TEST_ASSERT(size && isdigit(size[0]), "Need at least one digit in '%s'", size);
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base = strtoull(size, &scale, 0);
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TEST_ASSERT(base != ULLONG_MAX, "Overflow parsing size!");
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switch (tolower(*scale)) {
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case 't':
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shift = 40;
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break;
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case 'g':
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shift = 30;
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break;
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case 'm':
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shift = 20;
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break;
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case 'k':
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shift = 10;
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break;
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case 'b':
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case '\0':
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shift = 0;
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break;
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default:
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TEST_ASSERT(false, "Unknown size letter %c", *scale);
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}
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TEST_ASSERT((base << shift) >> shift == base, "Overflow scaling size!");
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return base << shift;
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}
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int64_t timespec_to_ns(struct timespec ts)
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{
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return (int64_t)ts.tv_nsec + 1000000000LL * (int64_t)ts.tv_sec;
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}
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struct timespec timespec_add_ns(struct timespec ts, int64_t ns)
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{
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struct timespec res;
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res.tv_nsec = ts.tv_nsec + ns;
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res.tv_sec = ts.tv_sec + res.tv_nsec / 1000000000LL;
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res.tv_nsec %= 1000000000LL;
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return res;
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}
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struct timespec timespec_add(struct timespec ts1, struct timespec ts2)
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{
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int64_t ns1 = timespec_to_ns(ts1);
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int64_t ns2 = timespec_to_ns(ts2);
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return timespec_add_ns((struct timespec){0}, ns1 + ns2);
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}
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struct timespec timespec_sub(struct timespec ts1, struct timespec ts2)
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{
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int64_t ns1 = timespec_to_ns(ts1);
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int64_t ns2 = timespec_to_ns(ts2);
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return timespec_add_ns((struct timespec){0}, ns1 - ns2);
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}
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struct timespec timespec_diff_now(struct timespec start)
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{
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struct timespec end;
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clock_gettime(CLOCK_MONOTONIC, &end);
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return timespec_sub(end, start);
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}
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struct timespec timespec_div(struct timespec ts, int divisor)
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{
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int64_t ns = timespec_to_ns(ts) / divisor;
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return timespec_add_ns((struct timespec){0}, ns);
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}
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void print_skip(const char *fmt, ...)
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{
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va_list ap;
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assert(fmt);
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va_start(ap, fmt);
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vprintf(fmt, ap);
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va_end(ap);
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puts(", skipping test");
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}
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