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"
43 ds_init(struct ds *ds)
51 ds_clear(struct ds *ds)
57 ds_truncate(struct ds *ds, size_t new_length)
59 if (ds->length > new_length) {
60 ds->length = new_length;
61 ds->string[new_length] = '\0';
66 ds_reserve(struct ds *ds, size_t min_length)
68 if (min_length > ds->allocated || !ds->string) {
69 ds->allocated += MAX(min_length, ds->allocated);
70 ds->allocated = MAX(8, ds->allocated);
71 ds->string = xrealloc(ds->string, ds->allocated + 1);
76 ds_put_char(struct ds *ds, char c)
78 ds_reserve(ds, ds->length + 1);
79 ds->string[ds->length++] = c;
80 ds->string[ds->length] = '\0';
84 ds_put_cstr(struct ds *ds, const char *s)
86 size_t s_len = strlen(s);
87 ds_reserve(ds, ds->length + s_len);
88 memcpy(&ds->string[ds->length], s, s_len + 1);
93 ds_put_format(struct ds *ds, const char *format, ...)
97 va_start(args, format);
98 ds_put_format_valist(ds, format, args);
103 ds_put_format_valist(struct ds *ds, const char *format, va_list args_)
109 va_copy(args, args_);
110 available = ds->string ? ds->allocated - ds->length + 1 : 0;
111 needed = vsnprintf(&ds->string[ds->length], available, format, args);
114 if (needed < available) {
115 ds->length += needed;
119 ds_reserve(ds, ds->length + needed);
121 va_copy(args, args_);
122 available = ds->allocated - ds->length + 1;
123 needed = vsnprintf(&ds->string[ds->length], available, format, args);
126 assert(needed < available);
127 ds->length += needed;
132 ds_put_printable(struct ds *ds, const char *s, size_t n)
134 ds_reserve(ds, ds->length + n);
136 unsigned char c = *s++;
137 if (c < 0x20 || c > 0x7e || c == '\\' || c == '"') {
138 ds_put_format(ds, "\\%03o", (int) c);
146 ds_put_strftime(struct ds *ds, const char *template, const struct tm *tm)
149 size_t avail = ds->string ? ds->allocated - ds->length + 1 : 0;
150 size_t used = strftime(&ds->string[ds->length], avail, template, tm);
155 ds_reserve(ds, ds->length + (avail < 32 ? 64 : 2 * avail));
160 ds_cstr(struct ds *ds)
164 ds->string[0] = '\0';
170 ds_destroy(struct ds *ds)
175 /* Writes the 'size' bytes in 'buf' to 'string' as hex bytes arranged 16 per
176 * line. Numeric offsets are also included, starting at 'ofs' for the first
177 * byte in 'buf'. If 'ascii' is true then the corresponding ASCII characters
178 * are also rendered alongside. */
180 ds_put_hex_dump(struct ds *ds, const void *buf_, size_t size,
181 uintptr_t ofs, bool ascii)
183 const uint8_t *buf = buf_;
184 const size_t per_line = 16; /* Maximum bytes per line. */
188 size_t start, end, n;
191 /* Number of bytes on this line. */
192 start = ofs % per_line;
194 if (end - start > size)
199 ds_put_format(ds, "%08jx ", (uintmax_t) ROUND_DOWN(ofs, per_line));
200 for (i = 0; i < start; i++)
201 ds_put_format(ds, " ");
203 ds_put_format(ds, "%02hhx%c",
204 buf[i - start], i == per_line / 2 - 1? '-' : ' ');
207 for (; i < per_line; i++)
208 ds_put_format(ds, " ");
209 ds_put_format(ds, "|");
210 for (i = 0; i < start; i++)
211 ds_put_format(ds, " ");
212 for (; i < end; i++) {
213 int c = buf[i - start];
214 ds_put_char(ds, c >= 32 && c < 127 ? c : '.');
216 for (; i < per_line; i++)
217 ds_put_format(ds, " ");
218 ds_put_format(ds, "|");
220 ds_put_format(ds, "\n");
229 ds_last(const struct ds *ds)
231 return ds->length > 0 ? (unsigned char) ds->string[ds->length - 1] : EOF;
235 ds_chomp(struct ds *ds, int c)
237 if (ds->length > 0 && ds->string[ds->length - 1] == (char) c) {
238 ds->string[--ds->length] = '\0';