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/*
* Embedded Linux library
* Copyright (C) 2015 Intel Corporation
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#define _GNU_SOURCE
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <assert.h>
#include <ell/ell.h>
#include "ell/useful.h"
static unsigned int nlpo2(unsigned int x)
{
x--;
x |= (x >> 1);
x |= (x >> 2);
x |= (x >> 4);
x |= (x >> 8);
x |= (x >> 16);
return x + 1;
}
static unsigned int fls(unsigned int x)
{
return x ? sizeof(x) * 8 - __builtin_clz(x) : 0;
}
static unsigned int align_power2(unsigned int u)
{
return 1 << fls(u - 1);
}
static void test_power2(const void *data)
{
size_t i;
for (i = 1; i < 1000000; i++) {
size_t size1, size2, size3 = 1;
size1 = nlpo2(i);
size2 = align_power2(i);
/* Find the next power of two */
while (size3 < i && size3 < SIZE_MAX)
size3 <<= 1;
assert(size1 == size2);
assert(size2 == size3);
assert(size3 == size1);
}
}
static void test_alloc(const void *data)
{
int i;
for (i = 2; i < 10000; i++) {
struct l_ringbuf *rb;
rb = l_ringbuf_new(i);
assert(rb != NULL);
assert(l_ringbuf_capacity(rb) == l_ringbuf_avail(rb));
l_ringbuf_free(rb);
}
}
static void test_printf(const void *data)
{
static size_t rb_size = 500;
static size_t rb_capa = 512;
struct l_ringbuf *rb;
int i;
rb = l_ringbuf_new(rb_size);
assert(rb != NULL);
assert(l_ringbuf_capacity(rb) == rb_capa);
for (i = 0; i < 10000; i++) {
size_t len, count = i % rb_capa;
char *str, *ptr;
if (!count)
continue;
len = asprintf(&str, "%*c", (int) count, 'x');
assert(len == count);
len = l_ringbuf_printf(rb, "%s", str);
assert(len == count);
assert(l_ringbuf_len(rb) == count);
assert(l_ringbuf_avail(rb) == rb_capa - len);
ptr = l_ringbuf_peek(rb, 0, &len);
assert(ptr != NULL);
assert(len == count);
assert(strncmp(str, ptr, len) == 0);
len = l_ringbuf_drain(rb, count);
assert(len == count);
assert(l_ringbuf_len(rb) == 0);
assert(l_ringbuf_avail(rb) == rb_capa);
free(str);
}
l_ringbuf_free(rb);
}
static void test_append(const void *unused)
{
static const uint8_t data[6] = { 1, 2, 3, 4, 5, 6 };
static const size_t rb_size = 12;
static const size_t rb_capa = 16;
size_t len_no_wrap;
ssize_t appended;
ssize_t space_left;
void *rb_data;
struct l_ringbuf *rb;
rb = l_ringbuf_new(rb_size);
assert(rb != NULL);
assert(l_ringbuf_capacity(rb) == rb_capa);
appended = l_ringbuf_append(rb, data, sizeof(data));
assert(appended == sizeof(data));
appended = l_ringbuf_append(rb, data, sizeof(data));
assert(appended == sizeof(data));
space_left = minsize(l_ringbuf_avail(rb), sizeof(data));
appended = l_ringbuf_append(rb, data, sizeof(data));
assert(appended == space_left);
rb_data = l_ringbuf_peek(rb, 0, &len_no_wrap);
assert(memcmp(rb_data, data, sizeof(data)) == 0);
l_ringbuf_drain(rb, sizeof(data));
rb_data = l_ringbuf_peek(rb, 0, &len_no_wrap);
assert(memcmp(rb_data, data, sizeof(data)) == 0);
l_ringbuf_drain(rb, sizeof(data));
rb_data = l_ringbuf_peek(rb, 0, &len_no_wrap);
assert(memcmp(rb_data, data, len_no_wrap) == 0);
l_ringbuf_drain(rb, len_no_wrap);
l_ringbuf_free(rb);
}
static void test_append2(const void *unused)
{
static const uint8_t expected_data1[14] = {3, 4, 5, 6, 1, 2, 3, 4, 5,
6, 1, 2, 3, 4 };
static const uint8_t expected_data2[2] = { 5, 6 };
static const uint8_t data[6] = { 1, 2, 3, 4, 5, 6 };
static const size_t rb_size = 12;
static const size_t rb_capa = 16;
size_t len_no_wrap;
ssize_t appended;
ssize_t space_left;
void *rb_data;
struct l_ringbuf *rb;
rb = l_ringbuf_new(rb_size);
assert(rb != NULL);
assert(l_ringbuf_capacity(rb) == rb_capa);
appended = l_ringbuf_append(rb, data, sizeof(data));
assert(appended == sizeof(data));
appended = l_ringbuf_append(rb, data, sizeof(data));
assert(appended == sizeof(data));
space_left = minsize(l_ringbuf_avail(rb), sizeof(data));
l_ringbuf_drain(rb, sizeof(data) - space_left);
appended = l_ringbuf_append(rb, data, sizeof(data));
assert(appended == sizeof(data));
rb_data = l_ringbuf_peek(rb, 0, &len_no_wrap);
assert(len_no_wrap == sizeof(expected_data1));
assert(memcmp(expected_data1, rb_data, len_no_wrap) == 0);
l_ringbuf_drain(rb, len_no_wrap);
rb_data = l_ringbuf_peek(rb, 0, &len_no_wrap);
assert(len_no_wrap == sizeof(expected_data2));
assert(memcmp(expected_data2, rb_data, len_no_wrap) == 0);
l_ringbuf_free(rb);
}
int main(int argc, char *argv[])
{
l_test_init(&argc, &argv);
l_test_add("/ringbuf/power2", test_power2, NULL);
l_test_add("/ringbuf/alloc", test_alloc, NULL);
l_test_add("/ringbuf/printf", test_printf, NULL);
l_test_add("/ringbuf/append", test_append, NULL);
l_test_add("/ringbuf/append2", test_append2, NULL);
return l_test_run();
}
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