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nuttx-apps/testing/libc/stdbit/stdbit.c

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testing/libc: add stdbit test Adds the testing application used for CI stdc*_ functions tests. Signed-off-by: Michal Lenc <michallenc@seznam.cz>
2026-02-08 15:49:23 +01:00
/****************************************************************************
* apps/testing/libc/stdbit/stdbit.c
*
* SPDX-License-Identifier: Apache-2.0
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <sys/stat.h>
#include <unistd.h>
#include <stdio.h>
#include <fcntl.h>
#include <stdbit.h>
#include <limits.h>
#include <sys/param.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#define CHAR_SIZ (8)
#define NBITS(x) (sizeof(x) * CHAR_SIZ)
/****************************************************************************
* Private Types
****************************************************************************/
struct test_entry_s
{
const char name[NAME_MAX];
CODE int (*entry)(void);
};
/****************************************************************************
* Private Functions Prototypes
****************************************************************************/
static int leading_zeros(void);
static int leading_ones(void);
static int trailing_zeros(void);
static int trailing_ones(void);
static int first_leading_zero(void);
static int first_leading_one(void);
static int first_trailing_zero(void);
static int first_trailing_one(void);
static int count_zeros(void);
static int count_ones(void);
static int has_single_bit(void);
static int bit_width(void);
static int bit_floor(void);
static int bit_ceil(void);
/****************************************************************************
* Private data
****************************************************************************/
static const struct test_entry_s g_entry_list[] =
{
{"leading_zeros", leading_zeros},
{"leading_ones", leading_ones},
{"trailing_zeros", trailing_zeros},
{"trailing_ones", trailing_ones},
{"first_leading_zero", first_leading_zero},
{"first_leading_one", first_leading_one},
{"first_trailing_zero", first_trailing_zero},
{"first_trailing_one", first_trailing_one},
{"count_zeros", count_zeros},
{"count_ones", count_ones},
{"has_single_bit", has_single_bit},
{"bit_width", bit_width},
{"bit_floor", bit_floor},
{"bit_ceil", bit_ceil},
};
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: leading_zeros
****************************************************************************/
static int leading_zeros(void)
{
int i;
int nbits;
int ret;
int ret2;
unsigned char uc;
unsigned short us;
unsigned int ui;
unsigned long int ul;
unsigned long long int ull;
nbits = NBITS(uc);
uc = (1 << (nbits - 1));
for (i = 0; i <= nbits; i++)
{
ret = stdc_leading_zeros_uc(uc);
ret2 = stdc_leading_zeros(uc);
if (ret != i || ret2 != i)
{
return -1;
}
uc = uc >> 1;
}
nbits = NBITS(us);
us = (1 << (nbits - 1));
for (i = 0; i <= nbits; i++)
{
ret = stdc_leading_zeros_us(us);
ret2 = stdc_leading_zeros(us);
if (ret != i || ret2 != i)
{
return -1;
}
us = us >> 1;
}
nbits = NBITS(ui);
ui = (1U << (nbits - 1));
for (i = 0; i <= nbits; i++)
{
ret = stdc_leading_zeros_ui(ui);
ret2 = stdc_leading_zeros(ui);
if (ret != i || ret2 != i)
{
return -1;
}
ui = ui >> 1;
}
nbits = NBITS(ul);
ul = (1UL << (nbits - 1));
for (i = 0; i <= nbits; i++)
{
ret = stdc_leading_zeros_ul(ul);
ret2 = stdc_leading_zeros(ul);
if (ret != i || ret2 != i)
{
return -1;
}
ul = ul >> 1;
}
nbits = NBITS(ull);
ull = (1ULL << (nbits - 1));
for (i = 0; i <= nbits; i++)
{
ret = stdc_leading_zeros_ul(ull);
ret2 = stdc_leading_zeros(ull);
if (ret != i || ret2 != i)
{
return -1;
}
ull = ull >> 1;
}
return 0;
}
/****************************************************************************
* Name: leading_ones
****************************************************************************/
static int leading_ones(void)
{
int i;
int nbits;
int ret;
int ret2;
unsigned char uc;
unsigned short us;
unsigned int ui;
unsigned long int ul;
unsigned long long int ull;
nbits = NBITS(uc);
uc = 0;
for (i = 0; i <= nbits; i++)
{
ret = stdc_leading_ones_uc(uc);
ret2 = stdc_leading_ones(uc);
if (ret != i || ret2 != i)
{
return -1;
}
uc |= (1 << (nbits - (i + 1)));
}
nbits = NBITS(us);
us = 0;
for (i = 0; i <= nbits; i++)
{
ret = stdc_leading_ones_us(us);
ret2 = stdc_leading_ones(us);
if (ret != i || ret2 != i)
{
return -1;
}
us |= (1 << (nbits - (i + 1)));
}
nbits = NBITS(ui);
ui = 0;
for (i = 0; i <= nbits; i++)
{
ret = stdc_leading_ones_ui(ui);
ret2 = stdc_leading_ones(ui);
if (ret != i || ret2 != i)
{
return -1;
}
ui |= (1U << (nbits - (i + 1)));
}
nbits = NBITS(ul);
ul = 0;
for (i = 0; i <= nbits; i++)
{
ret = stdc_leading_ones_ul(ul);
ret2 = stdc_leading_ones(ul);
if (ret != i || ret2 != i)
{
return -1;
}
ul |= (1UL << (nbits - (i + 1)));
}
nbits = NBITS(ull);
ull = 0;
for (i = 0; i <= nbits; i++)
{
ret = stdc_leading_ones_ul(ull);
ret2 = stdc_leading_ones(ull);
if (ret != i || ret2 != i)
{
return -1;
}
ull |= (1ULL << (nbits - (i + 1)));
}
return 0;
}
/****************************************************************************
* Name: trailing_zeros
****************************************************************************/
static int trailing_zeros(void)
{
int i;
int nbits;
int ret;
int ret2;
unsigned char uc;
unsigned short us;
unsigned int ui;
unsigned long int ul;
unsigned long long int ull;
nbits = NBITS(uc);
uc = 1;
for (i = 0; i <= nbits; i++)
{
ret = stdc_trailing_zeros_uc(uc);
ret2 = stdc_trailing_zeros(uc);
if (ret != i || ret2 != i)
{
return -1;
}
uc = uc << 1;
}
nbits = NBITS(us);
us = 1;
for (i = 0; i <= nbits; i++)
{
ret = stdc_trailing_zeros_us(us);
ret2 = stdc_trailing_zeros(us);
if (ret != i || ret2 != i)
{
return -1;
}
us = us << 1;
}
nbits = NBITS(ui);
ui = 1;
for (i = 0; i <= nbits; i++)
{
ret = stdc_trailing_zeros_ui(ui);
ret2 = stdc_trailing_zeros(ui);
if (ret != i || ret2 != i)
{
return -1;
}
ui = ui << 1;
}
nbits = NBITS(ul);
ul = 1;
for (i = 0; i <= nbits; i++)
{
ret = stdc_trailing_zeros_ul(ul);
ret2 = stdc_trailing_zeros(ul);
if (ret != i || ret2 != i)
{
return -1;
}
ul = ul << 1;
}
nbits = NBITS(ull);
ull = 1;
for (i = 0; i <= nbits; i++)
{
ret = stdc_trailing_zeros_ul(ull);
ret2 = stdc_trailing_zeros(ull);
if (ret != i || ret2 != i)
{
return -1;
}
ull = ull << 1;
}
return 0;
}
/****************************************************************************
* Name: traling_ones
****************************************************************************/
static int trailing_ones(void)
{
int i;
int nbits;
int ret;
int ret2;
unsigned char uc;
unsigned short us;
unsigned int ui;
unsigned long int ul;
unsigned long long int ull;
nbits = NBITS(uc);
uc = 0;
for (i = 0; i <= nbits; i++)
{
ret = stdc_trailing_ones_uc(uc);
ret2 = stdc_trailing_ones(uc);
if (ret != i || ret2 != i)
{
return -1;
}
uc |= (1 << i);
}
nbits = NBITS(us);
us = 0;
for (i = 0; i <= nbits; i++)
{
ret = stdc_trailing_ones_us(us);
ret2 = stdc_trailing_ones(us);
if (ret != i || ret2 != i)
{
return -1;
}
us |= (1 << i);
}
nbits = NBITS(ui);
ui = 0;
for (i = 0; i <= nbits; i++)
{
ret = stdc_trailing_ones_ui(ui);
ret2 = stdc_trailing_ones(ui);
if (ret != i || ret2 != i)
{
return -1;
}
ui |= (1U << i);
}
nbits = NBITS(ul);
ul = 0;
for (i = 0; i <= nbits; i++)
{
ret = stdc_trailing_ones_ul(ul);
ret2 = stdc_trailing_ones(ul);
if (ret != i || ret2 != i)
{
return -1;
}
ul |= (1UL << i);
}
nbits = NBITS(ull);
ull = 0;
for (i = 0; i <= nbits; i++)
{
ret = stdc_trailing_ones_ul(ull);
ret2 = stdc_trailing_ones(ull);
if (ret != i || ret2 != i)
{
return -1;
}
ull |= (1ULL << i);
}
return 0;
}
/****************************************************************************
* Name: first_leading_zero
****************************************************************************/
static int first_leading_zero(void)
{
int i;
int nbits;
int ret;
int ret2;
unsigned char uc;
unsigned short us;
unsigned int ui;
unsigned long int ul;
unsigned long long int ull;
nbits = NBITS(uc);
uc = 0;
for (i = 1; i <= nbits + 1; i++)
{
ret = stdc_first_leading_zero_uc(uc);
ret2 = stdc_first_leading_zero(uc);
if (ret != (i % (nbits + 1)) || ret2 != (i % (nbits + 1)))
{
return -1;
}
uc |= (1 << (nbits - i));
}
nbits = NBITS(us);
us = 0;
for (i = 1; i <= nbits + 1; i++)
{
ret = stdc_first_leading_zero_us(us);
ret2 = stdc_first_leading_zero(us);
if (ret != (i % (nbits + 1)) || ret2 != (i % (nbits + 1)))
{
return -1;
}
us |= (1 << (nbits - i));
}
nbits = NBITS(ui);
ui = 0;
for (i = 1; i <= nbits + 1; i++)
{
ret = stdc_first_leading_zero_ui(ui);
ret2 = stdc_first_leading_zero(ui);
if (ret != (i % (nbits + 1)) || ret2 != (i % (nbits + 1)))
{
return -1;
}
ui |= (1U << (nbits - i));
}
nbits = NBITS(ul);
ul = 0;
for (i = 1; i <= (nbits + 1); i++)
{
ret = stdc_first_leading_zero_ul(ul);
ret2 = stdc_first_leading_zero(ul);
if (ret != (i % (nbits + 1)) || ret2 != (i % (nbits + 1)))
{
return -1;
}
ul |= (1UL << (nbits - i));
}
nbits = NBITS(ull);
ull = 0;
for (i = 1; i <= nbits + 1; i++)
{
ret = stdc_first_leading_zero_ul(ull);
ret2 = stdc_first_leading_zero(ull);
if (ret != (i % (nbits + 1)) || ret2 != (i % (nbits + 1)))
{
return -1;
}
ull |= (1ULL << (nbits - i));
}
return 0;
}
/****************************************************************************
* Name: first_leading_zero
****************************************************************************/
static int first_leading_one(void)
{
int i;
int nbits;
int ret;
int ret2;
unsigned char uc;
unsigned short us;
unsigned int ui;
unsigned long int ul;
unsigned long long int ull;
nbits = NBITS(uc);
uc = UCHAR_MAX;
for (i = 0; i <= nbits; i++)
{
ret = stdc_first_leading_one_uc(uc);
ret2 = stdc_first_leading_one(uc);
if (ret != ((i + 1) % (nbits + 1)) || ret2 != ((i + 1) % (nbits + 1)))
{
return -1;
}
uc &= ~(1 << (nbits - (i + 1)));
}
nbits = NBITS(us);
us = USHRT_MAX;
for (i = 0; i <= nbits; i++)
{
ret = stdc_first_leading_one_us(us);
ret2 = stdc_first_leading_one(us);
if (ret != ((i + 1) % (nbits + 1)) || ret2 != ((i + 1) % (nbits + 1)))
{
return -1;
}
us &= ~(1 << (nbits - (i + 1)));
}
nbits = NBITS(ui);
ui = UINT_MAX;
for (i = 0; i <= nbits; i++)
{
ret = stdc_first_leading_one_ui(ui);
ret2 = stdc_first_leading_one(ui);
if (ret != ((i + 1) % (nbits + 1)) || ret2 != ((i + 1) % (nbits + 1)))
{
return -1;
}
ui &= ~(1U << (nbits - (i + 1)));
}
nbits = NBITS(ul);
ul = ULONG_MAX;
for (i = 0; i <= nbits; i++)
{
ret = stdc_first_leading_one_ul(ul);
ret2 = stdc_first_leading_one(ul);
if (ret != ((i + 1) % (nbits + 1)) || ret2 != ((i + 1) % (nbits + 1)))
{
return -1;
}
ul &= ~(1UL << (nbits - (i + 1)));
}
nbits = NBITS(ull);
ull = ULLONG_MAX;
for (i = 0; i <= nbits; i++)
{
ret = stdc_first_leading_one_ull(ull);
ret2 = stdc_first_leading_one(ull);
if (ret != ((i + 1) % (nbits + 1)) || ret2 != ((i + 1) % (nbits + 1)))
{
return -1;
}
ull &= ~(1ULL << (nbits - (i + 1)));
}
return 0;
}
/****************************************************************************
* Name: first_trailing_zero
****************************************************************************/
static int first_trailing_zero(void)
{
int i;
int nbits;
int ret;
int ret2;
unsigned char uc;
unsigned short us;
unsigned int ui;
unsigned long int ul;
unsigned long long int ull;
nbits = NBITS(uc);
uc = 0;
for (i = 0; i <= nbits; i++)
{
ret = stdc_first_trailing_zero_uc(uc);
ret2 = stdc_first_trailing_zero(uc);
if (ret != ((i + 1) % (nbits + 1)) || ret2 != ((i + 1) % (nbits + 1)))
{
return -1;
}
uc |= (1 << i);
}
nbits = NBITS(us);
us = 0;
for (i = 0; i <= nbits; i++)
{
ret = stdc_first_trailing_zero_us(us);
ret2 = stdc_first_trailing_zero(us);
if (ret != ((i + 1) % (nbits + 1)) || ret2 != ((i + 1) % (nbits + 1)))
{
return -1;
}
us |= (1 << i);
}
nbits = NBITS(ui);
ui = 0;
for (i = 0; i <= nbits; i++)
{
ret = stdc_first_trailing_zero_ui(ui);
ret2 = stdc_first_trailing_zero(ui);
if (ret != ((i + 1) % (nbits + 1)) || ret2 != ((i + 1) % (nbits + 1)))
{
return -1;
}
ui |= (1U << i);
}
nbits = NBITS(ul);
ul = 0;
for (i = 0; i <= nbits; i++)
{
ret = stdc_first_trailing_zero_ul(ul);
ret2 = stdc_first_trailing_zero(ul);
if (ret != ((i + 1) % (nbits + 1)) || ret2 != ((i + 1) % (nbits + 1)))
{
return -1;
}
ul |= (1UL << i);
}
nbits = NBITS(ull);
ull = 0;
for (i = 0; i <= nbits; i++)
{
ret = stdc_first_trailing_zero_ull(ull);
ret2 = stdc_first_trailing_zero(ull);
if (ret != ((i + 1) % (nbits + 1)) || ret2 != ((i + 1) % (nbits + 1)))
{
return -1;
}
ull |= (1ULL << i);
}
return 0;
}
/****************************************************************************
* Name: first_trailing_one
****************************************************************************/
static int first_trailing_one(void)
{
int i;
int nbits;
int ret;
int ret2;
unsigned char uc;
unsigned short us;
unsigned int ui;
unsigned long int ul;
unsigned long long int ull;
nbits = NBITS(uc);
uc = 0;
for (i = 0; i <= nbits; i++)
{
ret = stdc_first_trailing_one_uc(uc);
ret2 = stdc_first_trailing_one(uc);
if (ret != i || ret2 != i)
{
return -1;
}
uc = (1 << i);
}
nbits = NBITS(us);
us = 0;
for (i = 0; i <= nbits; i++)
{
ret = stdc_first_trailing_one_us(us);
ret2 = stdc_first_trailing_one(us);
if (ret != i || ret2 != i)
{
return -1;
}
us = (1 << i);
}
nbits = NBITS(ui);
ui = 0;
for (i = 0; i <= nbits; i++)
{
ret = stdc_first_trailing_one_ui(ui);
ret2 = stdc_first_trailing_one(ui);
if (ret != i || ret2 != i)
{
return -1;
}
ui = (1U << i);
}
nbits = NBITS(ul);
ul = 0;
for (i = 0; i <= nbits; i++)
{
ret = stdc_first_trailing_one_ul(ul);
ret2 = stdc_first_trailing_one(ul);
if (ret != i || ret2 != i)
{
return -1;
}
ul = (1UL << i);
}
nbits = NBITS(ull);
ull = 0;
for (i = 0; i <= nbits; i++)
{
ret = stdc_first_trailing_one_ull(ull);
ret2 = stdc_first_trailing_one(ull);
if (ret != i || ret2 != i)
{
return -1;
}
ull = (1ULL << i);
}
return 0;
}
/****************************************************************************
* Name: count_zeros
****************************************************************************/
static int count_zeros(void)
{
int i;
int nbits;
int ret;
int ret2;
unsigned char uc;
unsigned short us;
unsigned int ui;
unsigned long int ul;
unsigned long long int ull;
nbits = NBITS(uc);
uc = 0;
for (i = nbits; i >= 0; i--)
{
ret = stdc_count_zeros_uc(uc);
ret2 = stdc_count_zeros(uc);
if (ret != i || ret2 != i)
{
return -1;
}
uc |= (1 << (i - 1));
}
nbits = NBITS(us);
us = 0;
for (i = nbits; i >= 0; i--)
{
ret = stdc_count_zeros_us(us);
ret2 = stdc_count_zeros(us);
if (ret != i || ret2 != i)
{
return -1;
}
us |= (1 << (i - 1));
}
nbits = NBITS(ui);
ui = 0;
for (i = nbits; i >= 0; i--)
{
ret = stdc_count_zeros_ui(ui);
ret2 = stdc_count_zeros(ui);
if (ret != i || ret2 != i)
{
return -1;
}
ui |= (1U << (i - 1));
}
nbits = NBITS(ul);
ul = 0;
for (i = nbits; i >= 0; i--)
{
ret = stdc_count_zeros_ul(ul);
ret2 = stdc_count_zeros(ul);
if (ret != i || ret2 != i)
{
return -1;
}
ul |= (1UL << (i - 1));
}
nbits = NBITS(ull);
ull = 0;
for (i = nbits; i >= 0; i--)
{
ret = stdc_count_zeros_ull(ull);
ret2 = stdc_count_zeros(ull);
if (ret != i || ret2 != i)
{
return -1;
}
ull |= (1ULL << (i - 1));
}
return 0;
}
/****************************************************************************
* Name: count_ones
****************************************************************************/
static int count_ones(void)
{
int i;
int nbits;
int ret;
int ret2;
unsigned char uc;
unsigned short us;
unsigned int ui;
unsigned long int ul;
unsigned long long int ull;
nbits = NBITS(uc);
uc = 0;
for (i = 0; i <= nbits; i++)
{
ret = stdc_count_ones_uc(uc);
ret2 = stdc_count_ones(uc);
if (ret != i || ret2 != i)
{
return -1;
}
uc |= (1 << i);
}
nbits = NBITS(us);
us = 0;
for (i = 0; i <= nbits; i++)
{
ret = stdc_count_ones_us(us);
ret2 = stdc_count_ones(us);
if (ret != i || ret2 != i)
{
return -1;
}
us |= (1 << i);
}
nbits = NBITS(ui);
ui = 0;
for (i = 0; i <= nbits; i++)
{
ret = stdc_count_ones_ui(ui);
ret2 = stdc_count_ones(ui);
if (ret != i || ret2 != i)
{
return -1;
}
ui |= (1U << i);
}
nbits = NBITS(ul);
ul = 0;
for (i = 0; i <= nbits; i++)
{
ret = stdc_count_ones_ul(ul);
ret2 = stdc_count_ones(ul);
if (ret != i || ret2 != i)
{
return -1;
}
ul |= (1UL << i);
}
nbits = NBITS(ull);
ull = 0;
for (i = 0; i <= nbits; i++)
{
ret = stdc_count_ones_ull(ull);
ret2 = stdc_count_ones(ull);
if (ret != i || ret2 != i)
{
return -1;
}
ull |= (1ULL << i);
}
return 0;
}
/****************************************************************************
* Name: has_single_bit
****************************************************************************/
static int has_single_bit(void)
{
int i;
int nbits;
bool ret;
bool ret2;
unsigned char uc;
unsigned short us;
unsigned int ui;
unsigned long int ul;
unsigned long long int ull;
nbits = NBITS(uc);
uc = (1 << (nbits - 1));
for (i = 0; i < nbits; i++)
{
ret = stdc_has_single_bit_uc(uc);
ret2 = stdc_has_single_bit(uc);
if (!ret || !ret2)
{
return -1;
}
uc = uc >> 1;
}
nbits = NBITS(us);
us = (1 << (nbits - 1));
for (i = 0; i < nbits; i++)
{
ret = stdc_has_single_bit_us(us);
ret2 = stdc_has_single_bit(us);
if (!ret || !ret2)
{
return -1;
}
us = us >> 1;
}
nbits = NBITS(ui);
ui = (1U << (nbits - 1));
for (i = 0; i < nbits; i++)
{
ret = stdc_has_single_bit_ui(ui);
ret2 = stdc_has_single_bit(ui);
if (!ret || !ret2)
{
return -1;
}
ui = ui >> 1;
}
nbits = NBITS(ul);
ul = (1UL << (nbits - 1));
for (i = 0; i < nbits; i++)
{
ret = stdc_has_single_bit_ul(ul);
ret2 = stdc_has_single_bit(ul);
if (!ret || !ret2)
{
return -1;
}
ul = ul >> 1;
}
nbits = NBITS(ull);
ull = (1ULL << (nbits - 1));
for (i = 0; i < nbits; i++)
{
ret = stdc_has_single_bit_ull(ull);
ret2 = stdc_has_single_bit(ull);
if (!ret || !ret2)
{
return -1;
}
ull = ull >> 1;
}
return 0;
}
/****************************************************************************
* Name: bit_width
****************************************************************************/
static int bit_width(void)
{
int i;
int nbits;
int ret;
int ret2;
unsigned char uc;
unsigned short us;
unsigned int ui;
unsigned long int ul;
unsigned long long int ull;
nbits = NBITS(uc);
uc = 0;
for (i = 0; i <= nbits; i++)
{
ret = stdc_bit_width_uc(uc);
ret2 = stdc_bit_width(uc);
if (ret != i || ret2 != i)
{
return -1;
}
uc = 1 << i;
}
nbits = NBITS(us);
us = 0;
for (i = 0; i <= nbits; i++)
{
ret = stdc_bit_width_us(us);
ret2 = stdc_bit_width(us);
if (ret != i || ret2 != i)
{
return -1;
}
us = 1 << i;
}
nbits = NBITS(ui);
ui = 0;
for (i = 0; i <= nbits; i++)
{
ret = stdc_bit_width_ui(ui);
ret2 = stdc_bit_width(ui);
if (ret != i || ret2 != i)
{
return -1;
}
ui = 1U << i;
}
nbits = NBITS(ul);
ul = 0;
for (i = 0; i <= nbits; i++)
{
ret = stdc_bit_width_ul(ul);
ret2 = stdc_bit_width(ul);
if (ret != i || ret2 != i)
{
return -1;
}
ul = 1UL << i;
}
nbits = NBITS(ull);
ull = 0;
for (i = 0; i <= nbits; i++)
{
ret = stdc_bit_width_ull(ull);
ret2 = stdc_bit_width(ull);
if (ret != i || ret2 != i)
{
return -1;
}
ull = 1ULL << i;
}
return 0;
}
static int bit_floor(void)
{
int nbits;
unsigned long long ret;
unsigned long long ret2;
unsigned char uc;
unsigned short us;
unsigned int ui;
unsigned long int ul;
unsigned long long int ull;
uc = 5;
ret = stdc_bit_floor_uc(uc);
ret2 = stdc_bit_floor(uc);
if (ret != 4 || ret2 != 4)
{
return -1;
}
nbits = NBITS(uc);
uc = (1 << (nbits - 1)) + 1;
ret = stdc_bit_floor_uc(uc);
ret2 = stdc_bit_floor(uc);
if (ret != uc - 1 || ret2 != uc - 1)
{
return -1;
}
us = 5;
ret = stdc_bit_floor_us(us);
ret2 = stdc_bit_floor(us);
if (ret != 4 || ret2 != 4)
{
return -1;
}
nbits = NBITS(us);
us = (1 << (nbits - 1)) + 1;
ret = stdc_bit_floor_us(us);
ret2 = stdc_bit_floor(us);
if (ret != us - 1 || ret2 != us - 1)
{
return -1;
}
ui = 5;
ret = stdc_bit_floor_ui(ui);
ret2 = stdc_bit_floor(ui);
if (ret != 4 || ret2 != 4)
{
return -1;
}
nbits = NBITS(uc);
ui = (1U << (nbits - 1)) + 1;
ret = stdc_bit_floor_ui(ui);
ret2 = stdc_bit_floor(ui);
if (ret != ui - 1 || ret2 != ui - 1)
{
return -1;
}
ul = 5;
ret = stdc_bit_floor_ul(ul);
ret2 = stdc_bit_floor(ul);
if (ret != 4 || ret2 != 4)
{
return -1;
}
nbits = NBITS(ul);
ul = (1UL << (nbits - 1)) + 1;
ret = stdc_bit_floor_ul(ul);
ret2 = stdc_bit_floor(ul);
if (ret != ul - 1 || ret2 != ul - 1)
{
return -1;
}
ull = 5;
ret = stdc_bit_floor_ull(ull);
ret2 = stdc_bit_floor(ull);
if (ret != 4 || ret2 != 4)
{
return -1;
}
nbits = NBITS(ull);
ull = (1ULL << (nbits - 1)) + 1;
ret = stdc_bit_floor_ull(ull);
ret2 = stdc_bit_floor(ull);
if (ret != ull - 1 || ret2 != ull - 1)
{
return -1;
}
return 0;
}
static int bit_ceil(void)
{
int nbits;
unsigned long long ret;
unsigned long long ret2;
unsigned char uc;
unsigned short us;
unsigned int ui;
unsigned long int ul;
unsigned long long int ull;
uc = 5;
ret = stdc_bit_ceil_uc(uc);
ret2 = stdc_bit_ceil(uc);
if (ret != 8 || ret2 != 8)
{
return -1;
}
nbits = NBITS(uc);
uc = (1 << (nbits - 1)) - 1;
ret = stdc_bit_ceil_uc(uc);
ret2 = stdc_bit_ceil(uc);
if (ret != uc + 1 || ret2 != uc + 1)
{
return -1;
}
us = 5;
ret = stdc_bit_ceil_us(us);
ret2 = stdc_bit_ceil(us);
if (ret != 8 || ret2 != 8)
{
return -1;
}
nbits = NBITS(us);
us = (1 << (nbits - 1)) - 1;
ret = stdc_bit_ceil_us(us);
ret2 = stdc_bit_ceil(us);
if (ret != us + 1 || ret2 != us + 1)
{
return -1;
}
ui = 5;
ret = stdc_bit_ceil_ui(ui);
ret2 = stdc_bit_ceil(ui);
if (ret != 8 || ret2 != 8)
{
return -1;
}
nbits = NBITS(uc);
ui = (1U << (nbits - 1)) - 1;
ret = stdc_bit_ceil_ui(ui);
ret2 = stdc_bit_ceil(ui);
if (ret != ui + 1 || ret2 != ui + 1)
{
return -1;
}
ul = 5;
ret = stdc_bit_ceil_ul(ul);
ret2 = stdc_bit_ceil(ul);
if (ret != 8 || ret2 != 8)
{
return -1;
}
nbits = NBITS(ul);
ul = (1UL << (nbits - 1)) - 1;
ret = stdc_bit_ceil_ul(ul);
ret2 = stdc_bit_ceil(ul);
if (ret != ul + 1 || ret2 != ul + 1)
{
return -1;
}
ull = 5;
ret = stdc_bit_ceil_ull(ull);
ret2 = stdc_bit_ceil(ull);
if (ret != 8 || ret2 != 8)
{
return -1;
}
nbits = NBITS(ull);
ull = (1ULL << (nbits - 1)) - 1;
ret = stdc_bit_ceil_ull(ull);
ret2 = stdc_bit_ceil(ull);
if (ret != ull + 1 || ret2 != ull + 1)
{
return -1;
}
return 0;
}
/****************************************************************************
* Public Functions
****************************************************************************/
int main(int argc, FAR char *argv[])
{
const FAR struct test_entry_s *item = NULL;
int i;
int ret;
int tests_ok;
int tests_err;
tests_ok = tests_err = 0;
for (i = 0; i < sizeof(g_entry_list) / sizeof(g_entry_list[0]); i++)
{
item = &g_entry_list[i];
ret = item->entry();
if (ret < 0)
{
tests_err++;
printf("stdbit_tests: %s test failed.\n", item->name);
}
else
{
tests_ok++;
}
}
/* Run tests. They should return 0 on success, -1 otherwise. */
printf("stdbit tests: SUCCESSFUL: %d; FAILED: %d\n", tests_ok,
tests_err);
return 0;
}
Reference in a new issue Copy permalink