2 * Copyright (c) 2008, 2009, 2010 Nicira Networks.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
26 const char *program_name;
31 ovs_fatal(0, "virtual memory exhausted");
35 xcalloc(size_t count, size_t size)
37 void *p = count && size ? calloc(count, size) : malloc(1);
38 COVERAGE_INC(util_xalloc);
48 return xcalloc(1, size);
54 void *p = malloc(size ? size : 1);
55 COVERAGE_INC(util_xalloc);
63 xrealloc(void *p, size_t size)
65 p = realloc(p, size ? size : 1);
66 COVERAGE_INC(util_xalloc);
74 xmemdup(const void *p_, size_t size)
76 void *p = xmalloc(size);
82 xmemdup0(const char *p_, size_t length)
84 char *p = xmalloc(length + 1);
85 memcpy(p, p_, length);
91 xstrdup(const char *s)
93 return xmemdup0(s, strlen(s));
97 xvasprintf(const char *format, va_list args)
103 va_copy(args2, args);
104 needed = vsnprintf(NULL, 0, format, args);
106 s = xmalloc(needed + 1);
108 vsnprintf(s, needed + 1, format, args2);
115 x2nrealloc(void *p, size_t *n, size_t s)
117 *n = *n == 0 ? 1 : 2 * *n;
118 return xrealloc(p, *n * s);
122 xasprintf(const char *format, ...)
127 va_start(args, format);
128 s = xvasprintf(format, args);
135 ovs_strlcpy(char *dst, const char *src, size_t size)
138 size_t n = strlen(src);
139 size_t n_copy = MIN(n, size - 1);
140 memcpy(dst, src, n_copy);
146 ovs_fatal(int err_no, const char *format, ...)
150 fprintf(stderr, "%s: ", program_name);
151 va_start(args, format);
152 vfprintf(stderr, format, args);
155 fprintf(stderr, " (%s)", strerror(err_no));
162 ovs_error(int err_no, const char *format, ...)
164 int save_errno = errno;
167 fprintf(stderr, "%s: ", program_name);
168 va_start(args, format);
169 vfprintf(stderr, format, args);
172 fprintf(stderr, " (%s)",
173 err_no == EOF ? "end of file" : strerror(err_no));
180 /* Sets program_name based on 'argv0'. Should be called at the beginning of
181 * main(), as "set_program_name(argv[0]);". */
182 void set_program_name(const char *argv0)
184 const char *slash = strrchr(argv0, '/');
185 program_name = slash ? slash + 1 : argv0;
188 /* Print the version information for the program. */
190 ovs_print_version(char *date, char *time,
191 uint8_t min_ofp, uint8_t max_ofp)
193 printf("%s (Open vSwitch) "VERSION BUILDNR"\n", program_name);
194 printf("Compiled %s %s\n", date, time);
195 if (min_ofp || max_ofp) {
196 printf("OpenFlow versions %#x:%#x\n", min_ofp, max_ofp);
200 /* Writes the 'size' bytes in 'buf' to 'stream' as hex bytes arranged 16 per
201 * line. Numeric offsets are also included, starting at 'ofs' for the first
202 * byte in 'buf'. If 'ascii' is true then the corresponding ASCII characters
203 * are also rendered alongside. */
205 ovs_hex_dump(FILE *stream, const void *buf_, size_t size,
206 uintptr_t ofs, bool ascii)
208 const uint8_t *buf = buf_;
209 const size_t per_line = 16; /* Maximum bytes per line. */
213 size_t start, end, n;
216 /* Number of bytes on this line. */
217 start = ofs % per_line;
219 if (end - start > size)
224 fprintf(stream, "%08jx ", (uintmax_t) ROUND_DOWN(ofs, per_line));
225 for (i = 0; i < start; i++)
226 fprintf(stream, " ");
228 fprintf(stream, "%02hhx%c",
229 buf[i - start], i == per_line / 2 - 1? '-' : ' ');
232 for (; i < per_line; i++)
233 fprintf(stream, " ");
234 fprintf(stream, "|");
235 for (i = 0; i < start; i++)
236 fprintf(stream, " ");
237 for (; i < end; i++) {
238 int c = buf[i - start];
239 putc(c >= 32 && c < 127 ? c : '.', stream);
241 for (; i < per_line; i++)
242 fprintf(stream, " ");
243 fprintf(stream, "|");
245 fprintf(stream, "\n");
254 str_to_int(const char *s, int base, int *i)
257 bool ok = str_to_llong(s, base, &ll);
263 str_to_long(const char *s, int base, long *li)
266 bool ok = str_to_llong(s, base, &ll);
272 str_to_llong(const char *s, int base, long long *x)
274 int save_errno = errno;
277 *x = strtoll(s, &tail, base);
278 if (errno == EINVAL || errno == ERANGE || tail == s || *tail != '\0') {
289 str_to_uint(const char *s, int base, unsigned int *u)
291 return str_to_int(s, base, (int *) u);
295 str_to_ulong(const char *s, int base, unsigned long *ul)
297 return str_to_long(s, base, (long *) ul);
301 str_to_ullong(const char *s, int base, unsigned long long *ull)
303 return str_to_llong(s, base, (long long *) ull);
306 /* Converts floating-point string 's' into a double. If successful, stores
307 * the double in '*d' and returns true; on failure, stores 0 in '*d' and
310 * Underflow (e.g. "1e-9999") is not considered an error, but overflow
311 * (e.g. "1e9999)" is. */
313 str_to_double(const char *s, double *d)
315 int save_errno = errno;
318 *d = strtod(s, &tail);
319 if (errno == EINVAL || (errno == ERANGE && *d != 0)
320 || tail == s || *tail != '\0') {
330 /* Returns the value of 'c' as a hexadecimal digit. */
335 case '0': case '1': case '2': case '3': case '4':
336 case '5': case '6': case '7': case '8': case '9':
361 /* Returns the directory name portion of 'file_name' as a malloc()'d string,
362 * similar to the POSIX dirname() function but thread-safe. */
364 dir_name(const char *file_name)
366 size_t len = strlen(file_name);
367 while (len > 0 && file_name[len - 1] == '/') {
370 while (len > 0 && file_name[len - 1] != '/') {
373 while (len > 0 && file_name[len - 1] == '/') {
377 return xstrdup((file_name[0] == '/'
378 && file_name[1] == '/'
379 && file_name[2] != '/') ? "//"
380 : file_name[0] == '/' ? "/"
383 return xmemdup0(file_name, len);
387 /* Pass a value to this function if it is marked with
388 * __attribute__((warn_unused_result)) and you genuinely want to ignore
389 * its return value. (Note that every scalar type can be implicitly
390 * converted to bool.) */
391 void ignore(bool x OVS_UNUSED) { }