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.
40 const char *program_name;
45 fatal(0, "virtual memory exhausted");
49 xcalloc(size_t count, size_t size)
51 void *p = count && size ? calloc(count, size) : malloc(1);
61 void *p = malloc(size ? size : 1);
69 xrealloc(void *p, size_t size)
71 p = realloc(p, size ? size : 1);
79 xstrdup(const char *s_)
81 size_t size = strlen(s_) + 1;
82 char *s = xmalloc(size);
88 xasprintf(const char *format, ...)
94 va_start(args, format);
95 needed = vsnprintf(NULL, 0, format, args);
98 s = xmalloc(needed + 1);
100 va_start(args, format);
101 vsnprintf(s, needed + 1, format, args);
107 void fatal(int err_no, const char *format, ...)
111 fprintf(stderr, "%s: ", program_name);
112 va_start(args, format);
113 vfprintf(stderr, format, args);
116 fprintf(stderr, " (%s)", strerror(err_no));
122 void error(int err_no, const char *format, ...)
126 fprintf(stderr, "%s: ", program_name);
127 va_start(args, format);
128 vfprintf(stderr, format, args);
131 fprintf(stderr, " (%s)", strerror(err_no));
135 void debug(int err_no, const char *format, ...)
139 fprintf(stderr, "%s: ", program_name);
140 va_start(args, format);
141 vfprintf(stderr, format, args);
144 fprintf(stderr, " (%s)", strerror(err_no));
148 /* Sets program_name based on 'argv0'. Should be called at the beginning of
149 * main(), as "set_program_name(argv[0]);". */
150 void set_program_name(const char *argv0)
152 const char *slash = strrchr(argv0, '/');
153 program_name = slash ? slash + 1 : argv0;
156 /* Writes the 'size' bytes in 'buf' to 'stream' as hex bytes arranged 16 per
157 * line. Numeric offsets are also included, starting at 'ofs' for the first
158 * byte in 'buf'. If 'ascii' is true then the corresponding ASCII characters
159 * are also rendered alongside. */
161 hex_dump(FILE *stream, const void *buf_, size_t size,
162 uintptr_t ofs, bool ascii)
164 const uint8_t *buf = buf_;
165 const size_t per_line = 16; /* Maximum bytes per line. */
169 size_t start, end, n;
172 /* Number of bytes on this line. */
173 start = ofs % per_line;
175 if (end - start > size)
180 fprintf(stream, "%08jx ", (uintmax_t) ROUND_DOWN(ofs, per_line));
181 for (i = 0; i < start; i++)
182 fprintf(stream, " ");
184 fprintf(stream, "%02hhx%c",
185 buf[i - start], i == per_line / 2 - 1? '-' : ' ');
188 for (; i < per_line; i++)
189 fprintf(stream, " ");
190 fprintf(stream, "|");
191 for (i = 0; i < start; i++)
192 fprintf(stream, " ");
193 for (; i < end; i++) {
194 int c = buf[i - start];
195 putc(c >= 32 && c < 127 ? c : '.', stream);
197 for (; i < per_line; i++)
198 fprintf(stream, " ");
199 fprintf(stream, "|");
201 fprintf(stream, "\n");