aboutsummaryrefslogtreecommitdiff
path: root/0.4.0/paludis/util/strip.cc
blob: 3a220a12018853485d1b54613b3a12d3009628ad (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
/* vim: set sw=4 sts=4 et foldmethod=syntax : */

/*
 * Copyright (c) 2006 Ciaran McCreesh <ciaran.mccreesh@blueyonder.co.uk>
 *
 * This file is part of the Paludis package manager. Paludis is free software;
 * you can redistribute it and/or modify it under the terms of the GNU General
 * Public License version 2, as published by the Free Software Foundation.
 *
 * Paludis is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
 * Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <paludis/util/exception.hh>
#include <paludis/util/strip.hh>

/** \file
 * Implementation of strip things.
 *
 * \ingroup grpstrippers
 */

namespace paludis
{
    std::string strip_leading_string(const std::string & s, const std::string & prefix)
    {
        try
        {
            if (0 == s.compare(0, prefix.length(), prefix))
                return s.substr(prefix.length());
            else
                return s;
        }
        catch (const std::exception & e)
        {
            throw InternalError(PALUDIS_HERE, "Caught unexpected exception " +
                    stringify(e.what()));
        }
    }

    std::string strip_leading(const std::string & s, const std::string & remove)
    {
        try
        {
            std::string::size_type p(s.find_first_not_of(remove));
            if (std::string::npos == p)
                return std::string();
            else
                return s.substr(p);
        }
        catch (const std::exception & e)
        {
            throw InternalError(PALUDIS_HERE, "Caught unexpected exception " +
                    stringify(e.what()));
        }
    }

    std::string strip_trailing_string(const std::string & s, const std::string & suffix)
    {
        try
        {
            if (suffix.length() > s.length())
                return s;
            else if (0 == s.compare(s.length() - suffix.length(), suffix.length(), suffix))
                return s.substr(0, s.length() - suffix.length());
            else
                return s;
        }
        catch (const std::exception & e)
        {
            throw InternalError(PALUDIS_HERE, "Caught unexpected exception " +
                    stringify(e.what()) + " with s='" + s + "', suffix='" + suffix + "'");
        }
    }

    std::string strip_trailing(const std::string & s, const std::string & remove)
    {
        try
        {
            std::string::size_type p(s.find_last_not_of(remove));
            if (std::string::npos == p)
                return std::string();
            else
                return s.substr(0, p + 1);
        }
        catch (const std::exception & e)
        {
            throw InternalError(PALUDIS_HERE, "Caught unexpected exception " +
                    stringify(e.what()));
        }
    }
}