cprintf.hh revision 11320:42ecb523c64a 
1/*
2 * Copyright (c) 2014 ARM Limited
3 * Copyright (c) 2002-2006 The Regents of The University of Michigan
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are
8 * met: redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer;
10 * redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution;
13 * neither the name of the copyright holders nor the names of its
14 * contributors may be used to endorse or promote products derived from
15 * this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 * Authors: Nathan Binkert
30 *          Steve Reinhardt
31 *          Andreas Sandberg
32 */
33
34#ifndef __BASE_CPRINTF_HH__
35#define __BASE_CPRINTF_HH__
36
37#include <ios>
38#include <iostream>
39#include <list>
40#include <string>
41
42#include "base/cprintf_formats.hh"
43
44namespace cp {
45
46struct Print
47{
48  protected:
49    std::ostream &stream;
50    const char *format;
51    const char *ptr;
52    bool cont;
53
54    std::ios::fmtflags saved_flags;
55    char saved_fill;
56    int saved_precision;
57
58    Format fmt;
59    void process();
60    void process_flag();
61
62  public:
63    Print(std::ostream &stream, const std::string &format);
64    Print(std::ostream &stream, const char *format);
65    ~Print();
66
67    int
68    get_number(int data)
69    {
70        return data;
71    }
72
73    template <typename T>
74    int
75    get_number(const T& data)
76    {
77        return 0;
78    }
79
80    template <typename T>
81    void
82    add_arg(const T &data)
83    {
84        if (!cont)
85            process();
86
87        if (fmt.get_width) {
88            fmt.get_width = false;
89            cont = true;
90            fmt.width = get_number(data);
91            return;
92        }
93
94        if (fmt.get_precision) {
95            fmt.get_precision = false;
96            cont = true;
97            fmt.precision = get_number(data);
98            return;
99        }
100
101        switch (fmt.format) {
102          case Format::character:
103            format_char(stream, data, fmt);
104            break;
105
106          case Format::integer:
107            format_integer(stream, data, fmt);
108            break;
109
110          case Format::floating:
111            format_float(stream, data, fmt);
112            break;
113
114          case Format::string:
115            format_string(stream, data, fmt);
116            break;
117
118          default:
119            stream << "<bad format>";
120            break;
121        }
122    }
123
124    void end_args();
125};
126
127} // namespace cp
128
129inline void
130ccprintf(cp::Print &print)
131{
132    print.end_args();
133}
134
135
136template<typename T, typename ...Args> void
137ccprintf(cp::Print &print, const T &value, const Args &...args)
138{
139    print.add_arg(value);
140
141    ccprintf(print, args...);
142}
143
144
145template<typename ...Args> void
146ccprintf(std::ostream &stream, const char *format, const Args &...args)
147{
148    cp::Print print(stream, format);
149
150    ccprintf(print, args...);
151}
152
153
154template<typename ...Args> void
155cprintf(const char *format, const Args &...args)
156{
157    ccprintf(std::cout, format, args...);
158}
159
160template<typename ...Args> std::string
161csprintf(const char *format, const Args &...args)
162{
163    std::stringstream stream;
164    ccprintf(stream, format, args...);
165    return stream.str();
166}
167
168/*
169 * functions again with std::string.  We have both so we don't waste
170 * time converting const char * to std::string since we don't take
171 * advantage of it.
172 */
173template<typename ...Args> void
174ccprintf(std::ostream &stream, const std::string &format, const Args &...args)
175{
176    ccprintf(stream, format.c_str(), args...);
177}
178
179template<typename ...Args> void
180cprintf(const std::string &format, const Args &...args)
181{
182    ccprintf(std::cout, format.c_str(), args...);
183}
184
185template<typename ...Args> std::string
186csprintf(const std::string &format, const Args &...args)
187{
188    return csprintf(format.c_str(), args...);
189}
190
191#endif // __CPRINTF_HH__
192