summaryrefslogtreecommitdiffstats
path: root/wsutil/clopts_common.c
blob: fa17f8e365a67ead6742c7fb4e8a2194f260394c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
/* clopts_common.c
 * Handle command-line arguments common to various programs
 *
 * Wireshark - Network traffic analyzer
 * By Gerald Combs <gerald@wireshark.org>
 * Copyright 1998 Gerald Combs
 *
 * SPDX-License-Identifier: GPL-2.0-or-later
 */

#include "config.h"

#include "clopts_common.h"

#include <stdlib.h>
#include <errno.h>

#include <wsutil/strtoi.h>
#include <wsutil/cmdarg_err.h>

int
get_natural_int(const char *string, const char *name)
{
    int32_t number;

    if (!ws_strtoi32(string, NULL, &number)) {
        if (errno == EINVAL) {
            cmdarg_err("The specified %s \"%s\" isn't a decimal number", name, string);
            exit(1);
        }
        if (number < 0) {
            cmdarg_err("The specified %s \"%s\" is a negative number", name, string);
            exit(1);
        }
        cmdarg_err("The specified %s \"%s\" is too large (greater than %d)",
                name, string, number);
        exit(1);
    }
    if (number < 0) {
        cmdarg_err("The specified %s \"%s\" is a negative number", name, string);
        exit(1);
    }
    return (int)number;
}

int
get_positive_int(const char *string, const char *name)
{
    int number;

    number = get_natural_int(string, name);

    if (number == 0) {
        cmdarg_err("The specified %s is zero", name);
        exit(1);
    }

    return number;
}

uint32_t
get_guint32(const char *string, const char *name)
{
    uint32_t number;

    if (!ws_strtou32(string, NULL, &number)) {
        if (errno == EINVAL) {
            cmdarg_err("The specified %s \"%s\" isn't a decimal number", name, string);
            exit(1);
        }
        cmdarg_err("The specified %s \"%s\" is too large (greater than %d)",
                name, string, number);
        exit(1);
    }
    return number;
}

uint32_t
get_nonzero_guint32(const char *string, const char *name)
{
    uint32_t number;

    number = get_guint32(string, name);

    if (number == 0) {
        cmdarg_err("The specified %s is zero", name);
        exit(1);
    }

    return number;
}

double
get_positive_double(const char *string, const char *name)
{
    double number = g_ascii_strtod(string, NULL);

    if (errno == EINVAL) {
        cmdarg_err("The specified %s \"%s\" isn't a floating point number", name, string);
        exit(1);
    }
    if (number < 0.0) {
        cmdarg_err("The specified %s \"%s\" is a negative number", name, string);
        exit(1);
    }

    return number;
}