[v2] Add tst_parse_filesize functionality in LTP test API

Signed-off-by: Andrea Cervesato <andrea.cervesato@suse.com>
---
 include/tst_test.h               |   1 +
 lib/newlib_tests/test_tst_test.c | 123 +++++++++++++++++++++++++++++++
 lib/tst_test.c                   |  41 +++++++++++
 3 files changed, 165 insertions(+)
 create mode 100644 lib/newlib_tests/test_tst_test.c

Hi!
> +++ b/lib/newlib_tests/test_tst_test.c
> @@ -0,0 +1,123 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> +/*
> + * Copyright (C) 2021 SUSE LLC Andrea Cervesato <andrea.cervesato@suse.com>
> + */
> +
> +/*
> + * Tests for lib/tst_test.c
> + */

Well technically this is a test just for tst_parse_filesize() so I would
name the file test_parse_filesize.c or something like that.

> +#include "tst_test.h"
> +
> +static void do_test(void)
> +{
> +    long long val = 0;
> +    int ret = 0;
> +
> +    if ((ret = tst_parse_filesize("1", &val, LLONG_MIN, LLONG_MAX))) {
> +        tst_res(TFAIL, "return code %d (%s)", ret, tst_strerrno(ret));
> +    } else {
> +        if (val == 1)
> +            tst_res(TPASS, "value is %lli", val);
> +        else
> +            tst_res(TFAIL, "%lli != %lli", val, 1);
> +    }
> +
> +    /* small letters */
> +    if ((ret = tst_parse_filesize("1k", &val, LLONG_MIN, LLONG_MAX))) {
> +        tst_res(TFAIL, "return code %d (%s)", ret, tst_strerrno(ret));
> +    } else {
> +        if (val == 1024)
> +            tst_res(TPASS, "value is %lli", val);
> +        else
> +            tst_res(TFAIL, "%lli != %lli", val, 1024);
> +    }
> +
> +    if ((ret = tst_parse_filesize("1m", &val, LLONG_MIN, LLONG_MAX))) {
> +        tst_res(TFAIL, "return code %d (%s)", ret, tst_strerrno(ret));
> +    } else {
> +        if (val == 1048576)
> +            tst_res(TPASS, "value is %lli", val);
> +        else
> +            tst_res(TFAIL, "%lli != %lli", val, 1048576);
> +    }
> +
> +    if ((ret = tst_parse_filesize("1g", &val, LLONG_MIN, LLONG_MAX))) {
> +        tst_res(TFAIL, "return code %d (%s)", ret, tst_strerrno(ret));
> +    } else {
> +        if (val == 1073741824)
> +            tst_res(TPASS, "value is %lli", val);
> +        else
> +            tst_res(TFAIL, "%lli != %lli", val, 1073741824);
> +    }
> +
> +    /* big letters */
> +    if ((ret = tst_parse_filesize("1K", &val, LLONG_MIN, LLONG_MAX))) {
> +        tst_res(TFAIL, "return code %d (%s)", ret, tst_strerrno(ret));
> +    } else {
> +        if (val == 1024)
> +            tst_res(TPASS, "value is %lli", val);
> +        else
> +            tst_res(TFAIL, "%lli != %lli", val, 1024);
> +    }
> +
> +    if ((ret = tst_parse_filesize("1M", &val, LLONG_MIN, LLONG_MAX))) {
> +        tst_res(TFAIL, "return code %d (%s)", ret, tst_strerrno(ret));
> +    } else {
> +        if (val == 1048576)
> +            tst_res(TPASS, "value is %lli", val);
> +        else
> +            tst_res(TFAIL, "%lli != %lli", val, 1048576);
> +    }
> +
> +    if ((ret = tst_parse_filesize("1G", &val, LLONG_MIN, LLONG_MAX))) {
> +        tst_res(TFAIL, "return code %d (%s)", ret, tst_strerrno(ret));
> +    } else {
> +        if (val == 1073741824)
> +            tst_res(TPASS, "value is %lli", val);
> +        else
> +            tst_res(TFAIL, "%lli != %lli", val, 1073741824);
> +    }
> +
> +    /* test errors */
> +    if ((ret = tst_parse_filesize("k", &val, LLONG_MIN, LLONG_MAX))) {
> +        if (ret == EINVAL)
> +            tst_res(TPASS, "return code %d (%s)", ret, tst_strerrno(ret));
> +        else
> +            tst_res(TFAIL, "return code %d (%s)", ret, tst_strerrno(ret));
> +    } else {
> +        tst_res(TFAIL, "tst_parse_filesize should have failed");
> +    }
> +
> +    if ((ret = tst_parse_filesize("100", &val, LLONG_MIN, 10))) {
> +        if (ret == ERANGE)
> +            tst_res(TPASS, "return code %d (%s)", ret, tst_strerrno(ret));
> +        else
> +            tst_res(TFAIL, "return code %d (%s)", ret, tst_strerrno(ret));
> +    } else {
> +        tst_res(TFAIL, "tst_parse_filesize should have failed");
> +    }
> +
> +    if ((ret = tst_parse_filesize("10", &val, 100, LLONG_MAX))) {
> +        if (ret == ERANGE)
> +            tst_res(TPASS, "return code %d (%s)", ret, tst_strerrno(ret));
> +        else
> +            tst_res(TFAIL, "return code %d (%s)", ret, tst_strerrno(ret));
> +    } else {
> +        tst_res(TFAIL, "tst_parse_filesize should have failed");
> +    }
> +
> +
> +    if ((ret = tst_parse_filesize("garbage", &val, LLONG_MIN, LLONG_MAX))) {
> +        if (ret == EINVAL)
> +            tst_res(TPASS, "return code %d (%s)", ret, tst_strerrno(ret));
> +        else
> +            tst_res(TFAIL, "return code %d (%s)", ret, tst_strerrno(ret));
> +    } else {
> +        tst_res(TFAIL, "tst_parse_filesize should have failed");
> +    }
> +}
> +
> +static struct tst_test test = {
> +	.test_all = do_test,
> +};
> diff --git a/lib/tst_test.c b/lib/tst_test.c
> index a79275722..78b107ed0 100644
> --- a/lib/tst_test.c
> +++ b/lib/tst_test.c
> @@ -679,6 +679,47 @@ int tst_parse_float(const char *str, float *val, float min, float max)
>  	return 0;
>  }
>  
> +int tst_parse_filesize(const char *str, long long *val, long long min, long long max)
> +{
> +	long long rval;
> +	char *end;
> +
> +	if (!str)
> +		return 0;
> +
> +	errno = 0;
> +	rval = strtoll(str, &end, 0);
> +
> +	if (str == end || (strlen(end) != 0 && strlen(end) != 1))

No need for the strlen() here. what you do here is a fancy way of doing (!end[0] && !end[1]).

> +		return EINVAL;
> +
> +	if (errno)
> +		return errno;
> +
> +	switch (*end) {
> +	case 'g':
> +	case 'G':
> +		rval *= (1024 * 1024 * 1024);
> +		break;
> +	case 'm':
> +	case 'M':
> +		rval *= (1024 * 1024);
> +		break;
> +	case 'k':
> +	case 'K':
> +		rval *= 1024;
> +		break;
> +	default:
> +		break;
> +	}
> +
> +	if (rval > max || rval < min)
> +		return ERANGE;
> +
> +	*val = rval;
> +	return 0;
> +}
> +
>  static void print_colored(const char *str)
>  {
>  	if (tst_color_enabled(STDOUT_FILENO))

The rest looks good, but we should add a short note about the function
to the doc/c-test-api.txt as well.

Hi!
> > +	if (str == end || (strlen(end) != 0 && strlen(end) != 1))
> 
> No need for the strlen() here. what you do here is a fancy way of doing (!end[0] && !end[1]).

And of course it should be (end[0] && end[1]) that means that the string
is not terminated.

Or optionally (strlen(end) > 1) would work too.