1 /* Copyright (c) 2008 The Board of Trustees of The Leland Stanford
4 * We are making the OpenFlow specification and associated documentation
5 * (Software) available for public use and benefit with the expectation
6 * that others will use, modify and enhance the Software and contribute
7 * those enhancements back to the community. However, since we would
8 * like to make the Software available for broadest use, with as few
9 * restrictions as possible permission is hereby granted, free of
10 * charge, to any person obtaining a copy of this Software to deal in
11 * the Software under the copyrights without restriction, including
12 * without limitation the rights to use, copy, modify, merge, publish,
13 * distribute, sublicense, and/or sell copies of the Software, and to
14 * permit persons to whom the Software is furnished to do so, subject to
15 * the following conditions:
17 * The above copyright notice and this permission notice shall be
18 * included in all copies or substantial portions of the Software.
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
21 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
23 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
24 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
25 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
26 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
29 * The name and trademarks of copyright holder(s) may NOT be used in
30 * advertising or publicity pertaining to the Software or any
31 * derivatives without specific, written prior permission.
35 #include "dynamic-string.h"
44 ds_init(struct ds *ds)
52 ds_clear(struct ds *ds)
58 ds_truncate(struct ds *ds, size_t new_length)
60 if (ds->length > new_length) {
61 ds->length = new_length;
62 ds->string[new_length] = '\0';
67 ds_reserve(struct ds *ds, size_t min_length)
69 if (min_length > ds->allocated || !ds->string) {
70 ds->allocated += MAX(min_length, ds->allocated);
71 ds->allocated = MAX(8, ds->allocated);
72 ds->string = xrealloc(ds->string, ds->allocated + 1);
77 ds_put_uninit(struct ds *ds, size_t n)
79 ds_reserve(ds, ds->length + n);
81 ds->string[ds->length] = '\0';
82 return &ds->string[ds->length - n];
86 ds_put_char(struct ds *ds, char c)
88 *ds_put_uninit(ds, 1) = c;
92 ds_put_char_multiple(struct ds *ds, char c, size_t n)
94 memset(ds_put_uninit(ds, n), c, n);
98 ds_put_cstr(struct ds *ds, const char *s)
100 size_t s_len = strlen(s);
101 memcpy(ds_put_uninit(ds, s_len), s, s_len);
105 ds_put_format(struct ds *ds, const char *format, ...)
109 va_start(args, format);
110 ds_put_format_valist(ds, format, args);
115 ds_put_format_valist(struct ds *ds, const char *format, va_list args_)
121 va_copy(args, args_);
122 available = ds->string ? ds->allocated - ds->length + 1 : 0;
123 needed = vsnprintf(&ds->string[ds->length], available, format, args);
126 if (needed < available) {
127 ds->length += needed;
131 ds_reserve(ds, ds->length + needed);
133 va_copy(args, args_);
134 available = ds->allocated - ds->length + 1;
135 needed = vsnprintf(&ds->string[ds->length], available, format, args);
138 assert(needed < available);
139 ds->length += needed;
144 ds_put_printable(struct ds *ds, const char *s, size_t n)
146 ds_reserve(ds, ds->length + n);
148 unsigned char c = *s++;
149 if (c < 0x20 || c > 0x7e || c == '\\' || c == '"') {
150 ds_put_format(ds, "\\%03o", (int) c);
158 ds_put_strftime(struct ds *ds, const char *template, const struct tm *tm)
161 time_t now = time_now();
162 tm = localtime(&now);
165 size_t avail = ds->string ? ds->allocated - ds->length + 1 : 0;
166 size_t used = strftime(&ds->string[ds->length], avail, template, tm);
171 ds_reserve(ds, ds->length + (avail < 32 ? 64 : 2 * avail));
176 ds_cstr(struct ds *ds)
181 ds->string[ds->length] = '\0';
186 ds_destroy(struct ds *ds)
191 /* Writes the 'size' bytes in 'buf' to 'string' as hex bytes arranged 16 per
192 * line. Numeric offsets are also included, starting at 'ofs' for the first
193 * byte in 'buf'. If 'ascii' is true then the corresponding ASCII characters
194 * are also rendered alongside. */
196 ds_put_hex_dump(struct ds *ds, const void *buf_, size_t size,
197 uintptr_t ofs, bool ascii)
199 const uint8_t *buf = buf_;
200 const size_t per_line = 16; /* Maximum bytes per line. */
204 size_t start, end, n;
207 /* Number of bytes on this line. */
208 start = ofs % per_line;
210 if (end - start > size)
215 ds_put_format(ds, "%08jx ", (uintmax_t) ROUND_DOWN(ofs, per_line));
216 for (i = 0; i < start; i++)
217 ds_put_format(ds, " ");
219 ds_put_format(ds, "%02hhx%c",
220 buf[i - start], i == per_line / 2 - 1? '-' : ' ');
223 for (; i < per_line; i++)
224 ds_put_format(ds, " ");
225 ds_put_format(ds, "|");
226 for (i = 0; i < start; i++)
227 ds_put_format(ds, " ");
228 for (; i < end; i++) {
229 int c = buf[i - start];
230 ds_put_char(ds, c >= 32 && c < 127 ? c : '.');
232 for (; i < per_line; i++)
233 ds_put_format(ds, " ");
234 ds_put_format(ds, "|");
236 ds_put_format(ds, "\n");
245 ds_last(const struct ds *ds)
247 return ds->length > 0 ? (unsigned char) ds->string[ds->length - 1] : EOF;
251 ds_chomp(struct ds *ds, int c)
253 if (ds->length > 0 && ds->string[ds->length - 1] == (char) c) {
254 ds->string[--ds->length] = '\0';