str.hh revision 2665:a124942bacb8 
1/*
2 * Copyright (c) 2001-2005 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Authors: Nathan Binkert
29 *          Steve Reinhardt
30 */
31
32#ifndef __STR_HH__
33#define __STR_HH__
34
35#include <sstream>
36#include <string>
37#include <vector>
38
39#include <ctype.h>
40
41template<class> class Hash;
42template<>
43class Hash<std::string> {
44public:
45  unsigned operator()(const std::string &s) {
46      std::string::const_iterator i = s.begin();
47      std::string::const_iterator end = s.end();
48      unsigned hash = 5381;
49
50      while (i < end)
51          hash = ((hash << 5) + hash) + *i++;
52
53      return hash;
54  }
55};
56
57inline void
58eat_lead_white(std::string &s)
59{
60    std::string::size_type off = s.find_first_not_of(' ');
61    if (off != std::string::npos) {
62        std::string::iterator begin = s.begin();
63        s.erase(begin, begin + off);
64    }
65}
66
67inline void
68eat_end_white(std::string &s)
69{
70    std::string::size_type off = s.find_last_not_of(' ');
71    if (off != std::string::npos)
72        s.erase(s.begin() + off + 1, s.end());
73}
74
75inline void
76eat_white(std::string &s)
77{
78    eat_lead_white(s);
79    eat_end_white(s);
80}
81
82inline std::string
83to_lower(const std::string &s)
84{
85    std::string lower;
86    int len = s.size();
87
88    lower.reserve(len);
89
90    for (int i = 0; i < len; ++i)
91        lower.push_back(tolower(s[i]));
92
93    return lower;
94}
95
96// Split the string s into lhs and rhs on the first occurence of the
97// character c.
98bool
99split_first(const std::string &s, std::string &lhs, std::string &rhs, char c);
100
101// Split the string s into lhs and rhs on the last occurence of the
102// character c.
103bool
104split_last(const std::string &s, std::string &lhs, std::string &rhs, char c);
105
106// Tokenize the string <s> splitting on the character <token>, and
107// place the result in the string vector <vector>.  If <ign> is true,
108// then empty result strings (due to trailing tokens, or consecutive
109// tokens) are skipped.
110void
111tokenize(std::vector<std::string> &vector, const std::string &s,
112         char token, bool ign = true);
113
114template <class T> bool
115to_number(const std::string &value, T &retval);
116
117template <class T>
118inline std::string
119to_string(const T &value)
120{
121    std::stringstream str;
122    str << value;
123    return str.str();
124}
125
126// Put quotes around string arg if it contains spaces.
127inline std::string
128quote(const std::string &s)
129{
130    std::string ret;
131    bool quote = s.find(' ') != std::string::npos;
132
133    if (quote)
134        ret = '"';
135
136    ret += s;
137
138    if (quote)
139        ret += '"';
140
141    return ret;
142}
143
144#endif //__STR_HH__
145