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
43 #include <sys/types.h>
45 #include "netdissect.h"
62 unsigned char *theend;
65 int (*append_char)(struct state *, unsigned char);
66 int (*reserve)(struct state *, size_t);
70 #ifndef HAVE_VSNPRINTF
72 sn_reserve (struct state *state, size_t n)
74 return state->s + n > state->theend;
78 sn_append_char (struct state *state, unsigned char c)
80 if (sn_reserve (state, 1)) {
91 as_reserve (struct state *state, size_t n)
93 if (state->s + n > state->theend) {
94 int off = state->s - state->str;
97 if (state->max_sz && state->sz >= state->max_sz)
100 state->sz = max(state->sz * 2, state->sz + n);
102 state->sz = min(state->sz, state->max_sz);
103 tmp = realloc (state->str, state->sz);
107 state->s = state->str + off;
108 state->theend = state->str + state->sz - 1;
114 as_append_char (struct state *state, unsigned char c)
116 if(as_reserve (state, 1))
126 append_number(struct state *state,
127 unsigned long num, unsigned base, char *rep,
128 int width, int prec, int flags, int minusp)
133 /* given precision, ignore zero flag */
138 /* zero value with zero precision -> "" */
139 if(prec == 0 && num == 0)
142 if((*state->append_char)(state, rep[num % base]))
148 /* pad with prec zeros */
150 if((*state->append_char)(state, '0'))
154 /* add length of alternate prefix (added later) to len */
155 if(flags & alternate_flag && (base == 16 || base == 8))
158 if(flags & zero_flag){
160 if(minusp || (flags & space_flag) || (flags & plus_flag))
163 if((*state->append_char)(state, '0'))
168 /* add alternate prefix */
169 if(flags & alternate_flag && (base == 16 || base == 8)){
171 if((*state->append_char)(state, rep[10] + 23)) /* XXX */
173 if((*state->append_char)(state, '0'))
178 if((*state->append_char)(state, '-'))
181 } else if(flags & plus_flag) {
182 if((*state->append_char)(state, '+'))
185 } else if(flags & space_flag) {
186 if((*state->append_char)(state, ' '))
190 if(flags & minus_flag)
191 /* swap before padding with spaces */
192 for(i = 0; i < len / 2; i++){
193 char c = state->s[-i-1];
194 state->s[-i-1] = state->s[-len+i];
195 state->s[-len+i] = c;
199 if((*state->append_char)(state, ' '))
203 if(!(flags & minus_flag))
204 /* swap after padding with spaces */
205 for(i = 0; i < len / 2; i++){
206 char c = state->s[-i-1];
207 state->s[-i-1] = state->s[-len+i];
208 state->s[-len+i] = c;
215 append_string (struct state *state,
224 width -= strlen((char *)arg);
225 if(!(flags & minus_flag))
227 if((*state->append_char) (state, ' '))
230 while (*arg && prec--)
231 if ((*state->append_char) (state, *arg++))
235 if ((*state->append_char) (state, *arg++))
238 if(flags & minus_flag)
240 if((*state->append_char) (state, ' '))
246 append_char(struct state *state,
251 while(!(flags & minus_flag) && --width > 0)
252 if((*state->append_char) (state, ' '))
255 if((*state->append_char) (state, arg))
257 while((flags & minus_flag) && --width > 0)
258 if((*state->append_char) (state, ' '))
265 * This can't be made into a function...
268 #define PARSE_INT_FORMAT(res, arg, unsig) \
270 res = (unsig long)va_arg(arg, unsig long); \
271 else if (short_flag) \
272 res = (unsig short)va_arg(arg, unsig int); \
274 res = (unsig int)va_arg(arg, unsig int)
277 * zyxprintf - return 0 or -1
281 xyzprintf (struct state *state, const char *char_format, va_list ap)
283 const unsigned char *format = (const unsigned char *)char_format;
286 while((c = *format++)) {
295 while((c = *format++)){
303 flags |= alternate_flag;
310 if((flags & space_flag) && (flags & plus_flag))
313 if((flags & minus_flag) && (flags & zero_flag))
319 width = width * 10 + c - '0';
323 width = va_arg(ap, int);
333 prec = prec * 10 + c - '0';
337 prec = va_arg(ap, int);
347 } else if (c == 'l') {
354 if(append_char(state, va_arg(ap, int), width, flags))
358 if (append_string(state,
359 va_arg(ap, unsigned char*),
371 PARSE_INT_FORMAT(arg, ap, signed);
379 if (append_number (state, num, 10, "0123456789",
380 width, prec, flags, minusp))
387 PARSE_INT_FORMAT(arg, ap, unsigned);
389 if (append_number (state, arg, 10, "0123456789",
390 width, prec, flags, 0))
397 PARSE_INT_FORMAT(arg, ap, unsigned);
399 if (append_number (state, arg, 010, "01234567",
400 width, prec, flags, 0))
407 PARSE_INT_FORMAT(arg, ap, unsigned);
409 if (append_number (state, arg, 0x10, "0123456789abcdef",
410 width, prec, flags, 0))
417 PARSE_INT_FORMAT(arg, ap, unsigned);
419 if (append_number (state, arg, 0x10, "0123456789ABCDEF",
420 width, prec, flags, 0))
425 unsigned long arg = (unsigned long)va_arg(ap, void*);
427 if (append_number (state, arg, 0x10, "0123456789ABCDEF",
428 width, prec, flags, 0))
433 int *arg = va_arg(ap, int*);
434 *arg = state->s - state->str;
441 if ((*state->append_char)(state, c))
445 if ( (*state->append_char)(state, '%')
446 || (*state->append_char)(state, c))
451 if ((*state->append_char) (state, c))
457 #ifndef HAVE_SNPRINTF
459 snprintf (char *str, size_t sz, const char *format, ...)
464 va_start(args, format);
465 ret = vsnprintf (str, sz, format, args);
476 ret2 = vsprintf (tmp, format, args);
477 if (ret != ret2 || strcmp(str, tmp))
489 #ifndef HAVE_ASPRINTF
491 asprintf (char **ret, const char *format, ...)
496 va_start(args, format);
497 val = vasprintf (ret, format, args);
503 tmp = malloc (val + 1);
507 ret2 = vsprintf (tmp, format, args);
508 if (val != ret2 || strcmp(*ret, tmp))
519 #ifndef HAVE_ASNPRINTF
521 asnprintf (char **ret, size_t max_sz, const char *format, ...)
526 va_start(args, format);
527 val = vasnprintf (ret, max_sz, format, args);
533 tmp = malloc (val + 1);
537 ret2 = vsprintf (tmp, format, args);
538 if (val != ret2 || strcmp(*ret, tmp))
549 #ifndef HAVE_VASPRINTF
551 vasprintf (char **ret, const char *format, va_list args)
553 return vasnprintf (ret, 0, format, args);
558 #ifndef HAVE_VASNPRINTF
560 vasnprintf (char **ret, size_t max_sz, const char *format, va_list args)
566 state.max_sz = max_sz;
568 state.str = malloc(state.sz);
569 if (state.str == NULL) {
574 state.theend = state.s + state.sz - 1;
575 state.append_char = as_append_char;
576 state.reserve = as_reserve;
578 st = xyzprintf (&state, format, args);
587 len = state.s - state.str;
588 tmp = realloc (state.str, len+1);
601 #ifndef HAVE_VSNPRINTF
603 vsnprintf (char *str, size_t sz, const char *format, va_list args)
607 unsigned char *ustr = (unsigned char *)str;
613 state.theend = ustr + sz - 1;
614 state.append_char = sn_append_char;
615 state.reserve = sn_reserve;
617 ret = xyzprintf (&state, format, args);
622 return state.s - state.str;