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"
42 ds_init(struct ds *ds)
50 ds_clear(struct ds *ds)
56 ds_truncate(struct ds *ds, size_t new_length)
58 if (ds->length > new_length) {
59 ds->length = new_length;
60 ds->string[new_length] = '\0';
65 ds_reserve(struct ds *ds, size_t min_length)
67 if (min_length > ds->allocated || !ds->string) {
68 ds->allocated += MAX(min_length, ds->allocated);
69 ds->allocated = MAX(8, ds->allocated);
70 ds->string = xrealloc(ds->string, ds->allocated + 1);
75 ds_put_char(struct ds *ds, char c)
77 ds_reserve(ds, ds->length + 1);
78 ds->string[ds->length++] = c;
79 ds->string[ds->length] = '\0';
83 ds_put_cstr(struct ds *ds, const char *s)
85 size_t s_len = strlen(s);
86 ds_reserve(ds, ds->length + s_len);
87 memcpy(&ds->string[ds->length], s, s_len + 1);
92 ds_put_format(struct ds *ds, const char *format, ...)
96 va_start(args, format);
97 ds_put_format_valist(ds, format, args);
102 ds_put_format_valist(struct ds *ds, const char *format, va_list args_)
108 va_copy(args, args_);
109 available = ds->string ? ds->allocated - ds->length + 1 : 0;
110 needed = vsnprintf(&ds->string[ds->length], available, format, args);
113 if (needed < available) {
114 ds->length += needed;
118 ds_reserve(ds, ds->length + needed);
120 va_copy(args, args_);
121 available = ds->allocated - ds->length + 1;
122 needed = vsnprintf(&ds->string[ds->length], available, format, args);
125 assert(needed < available);
126 ds->length += needed;
131 ds_put_printable(struct ds *ds, const char *s, size_t n)
133 ds_reserve(ds, ds->length + n);
135 unsigned char c = *s++;
136 if (c < 0x20 || c > 0x7e || c == '\\' || c == '"') {
137 ds_put_format(ds, "\\%03o", (int) c);
145 ds_cstr(struct ds *ds)
149 ds->string[0] = '\0';
155 ds_destroy(struct ds *ds)
160 /* Writes the 'size' bytes in 'buf' to 'string' as hex bytes arranged 16 per
161 * line. Numeric offsets are also included, starting at 'ofs' for the first
162 * byte in 'buf'. If 'ascii' is true then the corresponding ASCII characters
163 * are also rendered alongside. */
165 ds_put_hex_dump(struct ds *ds, const void *buf_, size_t size,
166 uintptr_t ofs, bool ascii)
168 const uint8_t *buf = buf_;
169 const size_t per_line = 16; /* Maximum bytes per line. */
173 size_t start, end, n;
176 /* Number of bytes on this line. */
177 start = ofs % per_line;
179 if (end - start > size)
184 ds_put_format(ds, "%08jx ", (uintmax_t) ROUND_DOWN(ofs, per_line));
185 for (i = 0; i < start; i++)
186 ds_put_format(ds, " ");
188 ds_put_format(ds, "%02hhx%c",
189 buf[i - start], i == per_line / 2 - 1? '-' : ' ');
192 for (; i < per_line; i++)
193 ds_put_format(ds, " ");
194 ds_put_format(ds, "|");
195 for (i = 0; i < start; i++)
196 ds_put_format(ds, " ");
197 for (; i < end; i++) {
198 int c = buf[i - start];
199 ds_put_char(ds, c >= 32 && c < 127 ? c : '.');
201 for (; i < per_line; i++)
202 ds_put_format(ds, " ");
203 ds_put_format(ds, "|");
205 ds_put_format(ds, "\n");
214 ds_last(const struct ds *ds)
216 return ds->length > 0 ? (unsigned char) ds->string[ds->length - 1] : EOF;