2 * Copyright (c) 1995-1999 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the Institute nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * We use this for platforms that don't have snprintf() at all.
47 #include <sys/types.h>
49 #include "portability.h"
66 unsigned char *theend;
69 int (*append_char)(struct state *, unsigned char);
70 int (*reserve)(struct state *, size_t);
74 #ifndef HAVE_VSNPRINTF
76 sn_reserve (struct state *state, size_t n)
78 return state->s + n > state->theend;
82 sn_append_char (struct state *state, unsigned char c)
84 if (sn_reserve (state, 1)) {
95 as_reserve (struct state *state, size_t n)
97 if (state->s + n > state->theend) {
98 int off = state->s - state->str;
101 if (state->max_sz && state->sz >= state->max_sz)
104 state->sz = max(state->sz * 2, state->sz + n);
106 state->sz = min(state->sz, state->max_sz);
107 tmp = realloc (state->str, state->sz);
111 state->s = state->str + off;
112 state->theend = state->str + state->sz - 1;
118 as_append_char (struct state *state, unsigned char c)
120 if(as_reserve (state, 1))
130 append_number(struct state *state,
131 unsigned long num, unsigned base, char *rep,
132 int width, int prec, int flags, int minusp)
137 /* given precision, ignore zero flag */
142 /* zero value with zero precision -> "" */
143 if(prec == 0 && num == 0)
146 if((*state->append_char)(state, rep[num % base]))
152 /* pad with prec zeros */
154 if((*state->append_char)(state, '0'))
158 /* add length of alternate prefix (added later) to len */
159 if(flags & alternate_flag && (base == 16 || base == 8))
162 if(flags & zero_flag){
164 if(minusp || (flags & space_flag) || (flags & plus_flag))
167 if((*state->append_char)(state, '0'))
172 /* add alternate prefix */
173 if(flags & alternate_flag && (base == 16 || base == 8)){
175 if((*state->append_char)(state, rep[10] + 23)) /* XXX */
177 if((*state->append_char)(state, '0'))
182 if((*state->append_char)(state, '-'))
185 } else if(flags & plus_flag) {
186 if((*state->append_char)(state, '+'))
189 } else if(flags & space_flag) {
190 if((*state->append_char)(state, ' '))
194 if(flags & minus_flag)
195 /* swap before padding with spaces */
196 for(i = 0; i < len / 2; i++){
197 char c = state->s[-i-1];
198 state->s[-i-1] = state->s[-len+i];
199 state->s[-len+i] = c;
203 if((*state->append_char)(state, ' '))
207 if(!(flags & minus_flag))
208 /* swap after padding with spaces */
209 for(i = 0; i < len / 2; i++){
210 char c = state->s[-i-1];
211 state->s[-i-1] = state->s[-len+i];
212 state->s[-len+i] = c;
219 append_string (struct state *state,
228 width -= strlen((char *)arg);
229 if(!(flags & minus_flag))
231 if((*state->append_char) (state, ' '))
234 while (*arg && prec--)
235 if ((*state->append_char) (state, *arg++))
239 if ((*state->append_char) (state, *arg++))
242 if(flags & minus_flag)
244 if((*state->append_char) (state, ' '))
250 append_char(struct state *state,
255 while(!(flags & minus_flag) && --width > 0)
256 if((*state->append_char) (state, ' '))
259 if((*state->append_char) (state, arg))
261 while((flags & minus_flag) && --width > 0)
262 if((*state->append_char) (state, ' '))
269 * This can't be made into a function...
272 #define PARSE_INT_FORMAT(res, arg, unsig) \
274 res = (unsig long)va_arg(arg, unsig long); \
275 else if (short_flag) \
276 res = (unsig short)va_arg(arg, unsig int); \
278 res = (unsig int)va_arg(arg, unsig int)
281 * zyxprintf - return 0 or -1
285 xyzprintf (struct state *state, const char *char_format, va_list ap)
287 const unsigned char *format = (const unsigned char *)char_format;
290 while((c = *format++)) {
299 while((c = *format++)){
307 flags |= alternate_flag;
314 if((flags & space_flag) && (flags & plus_flag))
317 if((flags & minus_flag) && (flags & zero_flag))
323 width = width * 10 + c - '0';
327 width = va_arg(ap, int);
337 prec = prec * 10 + c - '0';
341 prec = va_arg(ap, int);
351 } else if (c == 'l') {
358 if(append_char(state, va_arg(ap, int), width, flags))
362 if (append_string(state,
363 va_arg(ap, unsigned char*),
375 PARSE_INT_FORMAT(arg, ap, signed);
383 if (append_number (state, num, 10, "0123456789",
384 width, prec, flags, minusp))
391 PARSE_INT_FORMAT(arg, ap, unsigned);
393 if (append_number (state, arg, 10, "0123456789",
394 width, prec, flags, 0))
401 PARSE_INT_FORMAT(arg, ap, unsigned);
403 if (append_number (state, arg, 010, "01234567",
404 width, prec, flags, 0))
411 PARSE_INT_FORMAT(arg, ap, unsigned);
413 if (append_number (state, arg, 0x10, "0123456789abcdef",
414 width, prec, flags, 0))
421 PARSE_INT_FORMAT(arg, ap, unsigned);
423 if (append_number (state, arg, 0x10, "0123456789ABCDEF",
424 width, prec, flags, 0))
429 unsigned long arg = (unsigned long)va_arg(ap, void*);
431 if (append_number (state, arg, 0x10, "0123456789ABCDEF",
432 width, prec, flags, 0))
437 int *arg = va_arg(ap, int*);
438 *arg = state->s - state->str;
445 if ((*state->append_char)(state, c))
449 if ( (*state->append_char)(state, '%')
450 || (*state->append_char)(state, c))
455 if ((*state->append_char) (state, c))
461 #ifndef HAVE_SNPRINTF
463 pcap_snprintf (char *str, size_t sz, const char *format, ...)
468 va_start(args, format);
469 ret = pcap_vsnprintf (str, sz, format, args);
480 ret2 = pcap_vsprintf (tmp, format, args);
481 if (ret != ret2 || strcmp(str, tmp))
493 #ifndef HAVE_ASPRINTF
495 asprintf (char **ret, const char *format, ...)
500 va_start(args, format);
501 val = vasprintf (ret, format, args);
507 tmp = malloc (val + 1);
511 ret2 = vsprintf (tmp, format, args);
512 if (val != ret2 || strcmp(*ret, tmp))
523 #ifndef HAVE_ASNPRINTF
525 pcap_asnprintf (char **ret, size_t max_sz, const char *format, ...)
530 va_start(args, format);
531 val = pcap_vasnprintf (ret, max_sz, format, args);
538 tmp = malloc (val + 1);
542 va_start(args, format);
543 ret2 = pcap_vsprintf (tmp, format, args);
545 if (val != ret2 || strcmp(*ret, tmp))
555 #ifndef HAVE_VASPRINTF
557 pcap_vasprintf (char **ret, const char *format, va_list args)
559 return pcap_vasnprintf (ret, 0, format, args);
564 #ifndef HAVE_VASNPRINTF
566 pcap_vasnprintf (char **ret, size_t max_sz, const char *format, va_list args)
572 state.max_sz = max_sz;
574 state.str = malloc(state.sz);
575 if (state.str == NULL) {
580 state.theend = state.s + state.sz - 1;
581 state.append_char = as_append_char;
582 state.reserve = as_reserve;
584 st = xyzprintf (&state, format, args);
593 len = state.s - state.str;
594 tmp = realloc (state.str, len+1);
607 #ifndef HAVE_VSNPRINTF
609 pcap_vsnprintf (char *str, size_t sz, const char *format, va_list args)
613 unsigned char *ustr = (unsigned char *)str;
619 state.theend = ustr + sz - 1;
620 state.append_char = sn_append_char;
621 state.reserve = sn_reserve;
623 ret = xyzprintf (&state, format, args);
628 return state.s - state.str;