summaryrefslogtreecommitdiff
path: root/base/cprintf_formats.hh
blob: 05a8723a471d82ef05552d0b6739d8da773ff6f7 (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
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
/*
 * Copyright (c) 2003-2005 The Regents of The University of Michigan
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met: redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer;
 * redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution;
 * neither the name of the copyright holders nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef __CPRINTF_FORMATS_HH__
#define __CPRINTF_FORMATS_HH__

#include <sstream>
#include <ostream>

namespace cp {

struct Format
{
    bool alternate_form;
    bool flush_left;
    bool print_sign;
    bool blank_space;
    bool fill_zero;
    bool uppercase;
    enum { dec, hex, oct } base;
    enum { none, string, integer, character, floating } format;
    enum { best, fixed, scientific } float_format;
    int precision;
    int width;

    Format() { clear(); }

    void clear()
    {
        alternate_form = false;
        flush_left = false;
        print_sign = false;
        blank_space = false;
        fill_zero = false;
        uppercase = false;
        base = dec;
        format = none;
        precision = -1;
        width = 0;
    }
};

template <typename T>
inline void
_format_char(std::ostream &out, const T &data, Format &fmt)
{
    using namespace std;

    out << data;
}

template <typename T>
inline void
_format_integer(std::ostream &out, const T &data, Format &fmt)
{
    using namespace std;

    switch (fmt.base) {
      case Format::hex:
        out.setf(ios::hex, ios::basefield);
        break;

      case Format::oct:
        out.setf(ios::oct, ios::basefield);
        break;

      case Format::dec:
        out.setf(ios::dec, ios::basefield);
        break;
    }

    if (fmt.alternate_form) {
        if (!fmt.fill_zero)
            out.setf(ios::showbase);
        else {
            switch (fmt.base) {
              case Format::hex:
                out << "0x";
                fmt.width -= 2;
                break;
              case Format::oct:
                out << "0";
                fmt.width -= 1;
                break;
              case Format::dec:
                break;
            }
        }
    }

    if (fmt.fill_zero)
        out.fill('0');

    if (fmt.width > 0)
        out.width(fmt.width);

    if (fmt.flush_left && !fmt.fill_zero)
        out.setf(ios::left);

    if (fmt.print_sign)
        out.setf(ios::showpos);

    if (fmt.uppercase)
        out.setf(ios::uppercase);

    out << data;
}

template <typename T>
inline void
_format_float(std::ostream &out, const T &data, Format &fmt)
{
    using namespace std;

    switch (fmt.float_format) {
      case Format::scientific:
        if (fmt.precision != -1) {
            if (fmt.width > 0)
                out.width(fmt.width);

            if (fmt.precision == 0)
                fmt.precision = 1;
            else
                out.setf(ios::scientific);

            out.precision(fmt.precision);
        } else
            if (fmt.width > 0)
                out.width(fmt.width);

        if (fmt.uppercase)
            out.setf(ios::uppercase);
        break;

      case Format::fixed:
        if (fmt.precision != -1) {
            if (fmt.width > 0)
                out.width(fmt.width);

            out.setf(ios::fixed);
            out.precision(fmt.precision);
        } else
            if (fmt.width > 0)
                out.width(fmt.width);

        break;

      default:
        if (fmt.precision != -1)
            out.precision(fmt.precision);

        if (fmt.width > 0)
            out.width(fmt.width);

        break;
    }

    out << data;
}

template <typename T>
inline void
_format_string(std::ostream &out, const T &data, Format &fmt)
{
    using namespace std;

#if defined(__GNUC__) && (__GNUC__ < 3) || 1
    if (fmt.width > 0) {
        std::stringstream foo;
        foo << data;
        int flen = foo.str().size();

        if (fmt.width > flen) {
            char *spaces = new char[fmt.width - flen + 1];
            memset(spaces, ' ', fmt.width - flen);
            spaces[fmt.width - flen] = 0;

            if (fmt.flush_left)
                out << foo.str() << spaces;
            else
                out << spaces << foo.str();

            delete [] spaces;
        } else
            out << data;
    } else
        out << data;
#else
    if (fmt.width > 0)
        out.width(fmt.width);
    if (fmt.flush_left)
        out.setf(ios::left);

    out << data;
#endif
}

/////////////////////////////////////////////////////////////////////////////
//
//  The code below controls the actual usage of formats for various types
//

//
// character formats
//
template <typename T>
inline void
format_char(std::ostream &out, const T &data, Format &fmt)
{ out << "<bad arg type for char format>"; }

inline void
format_char(std::ostream &out, char data, Format &fmt)
{ _format_char(out, data, fmt); }

inline void
format_char(std::ostream &out, unsigned char data, Format &fmt)
{ _format_char(out, data, fmt); }

inline void
format_char(std::ostream &out, signed char data, Format &fmt)
{ _format_char(out, data, fmt); }

inline void
format_char(std::ostream &out, short data, Format &fmt)
{ _format_char(out, (char)data, fmt); }

inline void
format_char(std::ostream &out, unsigned short data, Format &fmt)
{ _format_char(out, (char)data, fmt); }

inline void
format_char(std::ostream &out, int data, Format &fmt)
{ _format_char(out, (char)data, fmt); }

inline void
format_char(std::ostream &out, unsigned int data, Format &fmt)
{ _format_char(out, (char)data, fmt); }

inline void
format_char(std::ostream &out, long data, Format &fmt)
{ _format_char(out, (char)data, fmt); }

inline void
format_char(std::ostream &out, unsigned long data, Format &fmt)
{ _format_char(out, (char)data, fmt); }

inline void
format_char(std::ostream &out, long long data, Format &fmt)
{ _format_char(out, (char)data, fmt); }

inline void
format_char(std::ostream &out, unsigned long long data, Format &fmt)
{ _format_char(out, (char)data, fmt); }

//
// integer formats
//
template <typename T>
inline void
format_integer(std::ostream &out, const T &data, Format &fmt)
{ _format_integer(out, data, fmt); }
inline void
format_integer(std::ostream &out, char data, Format &fmt)
{ _format_integer(out, data, fmt); }
inline void
format_integer(std::ostream &out, unsigned char data, Format &fmt)
{ _format_integer(out, data, fmt); }
inline void
format_integer(std::ostream &out, signed char data, Format &fmt)
{ _format_integer(out, data, fmt); }
#if 0
inline void
format_integer(std::ostream &out, short data, Format &fmt)
{ _format_integer(out, data, fmt); }
inline void
format_integer(std::ostream &out, unsigned short data, Format &fmt)
{ _format_integer(out, data, fmt); }
inline void
format_integer(std::ostream &out, int data, Format &fmt)
{ _format_integer(out, data, fmt); }
inline void
format_integer(std::ostream &out, unsigned int data, Format &fmt)
{ _format_integer(out, data, fmt); }
inline void
format_integer(std::ostream &out, long data, Format &fmt)
{ _format_integer(out, data, fmt); }
inline void
format_integer(std::ostream &out, unsigned long data, Format &fmt)
{ _format_integer(out, data, fmt); }
inline void
format_integer(std::ostream &out, long long data, Format &fmt)
{ _format_integer(out, data, fmt); }
inline void
format_integer(std::ostream &out, unsigned long long data, Format &fmt)
{ _format_integer(out, data, fmt); }
#endif

//
// floating point formats
//
template <typename T>
inline void
format_float(std::ostream &out, const T &data, Format &fmt)
{ out << "<bad arg type for float format>"; }

inline void
format_float(std::ostream &out, float data, Format &fmt)
{ _format_float(out, data, fmt); }

inline void
format_float(std::ostream &out, double data, Format &fmt)
{ _format_float(out, data, fmt); }

//
// string formats
//
template <typename T>
inline void
format_string(std::ostream &out, const T &data, Format &fmt)
{ _format_string(out, data, fmt); }

inline void
format_string(std::ostream &out, const std::stringstream &data, Format &fmt)
{ _format_string(out, data.str(), fmt); }

} // namespace cp

#endif // __CPRINTF_FORMATS_HH__