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);
72 as_reserve (struct state *state, size_t n)
74 if (state->s + n > state->theend) {
75 int off = state->s - state->str;
78 if (state->max_sz && state->sz >= state->max_sz)
81 state->sz = max(state->sz * 2, state->sz + n);
83 state->sz = min(state->sz, state->max_sz);
84 tmp = realloc (state->str, state->sz);
88 state->s = state->str + off;
89 state->theend = state->str + state->sz - 1;
95 as_append_char (struct state *state, unsigned char c)
97 if(as_reserve (state, 1))
107 append_number(struct state *state,
108 unsigned long num, unsigned base, char *rep,
109 int width, int prec, int flags, int minusp)
114 /* given precision, ignore zero flag */
119 /* zero value with zero precision -> "" */
120 if(prec == 0 && num == 0)
123 if((*state->append_char)(state, rep[num % base]))
129 /* pad with prec zeros */
131 if((*state->append_char)(state, '0'))
135 /* add length of alternate prefix (added later) to len */
136 if(flags & alternate_flag && (base == 16 || base == 8))
139 if(flags & zero_flag){
141 if(minusp || (flags & space_flag) || (flags & plus_flag))
144 if((*state->append_char)(state, '0'))
149 /* add alternate prefix */
150 if(flags & alternate_flag && (base == 16 || base == 8)){
152 if((*state->append_char)(state, rep[10] + 23)) /* XXX */
154 if((*state->append_char)(state, '0'))
159 if((*state->append_char)(state, '-'))
162 } else if(flags & plus_flag) {
163 if((*state->append_char)(state, '+'))
166 } else if(flags & space_flag) {
167 if((*state->append_char)(state, ' '))
171 if(flags & minus_flag)
172 /* swap before padding with spaces */
173 for(i = 0; i < len / 2; i++){
174 char c = state->s[-i-1];
175 state->s[-i-1] = state->s[-len+i];
176 state->s[-len+i] = c;
180 if((*state->append_char)(state, ' '))
184 if(!(flags & minus_flag))
185 /* swap after padding with spaces */
186 for(i = 0; i < len / 2; i++){
187 char c = state->s[-i-1];
188 state->s[-i-1] = state->s[-len+i];
189 state->s[-len+i] = c;
196 append_string (struct state *state,
205 width -= strlen((char *)arg);
206 if(!(flags & minus_flag))
208 if((*state->append_char) (state, ' '))
211 while (*arg && prec--)
212 if ((*state->append_char) (state, *arg++))
216 if ((*state->append_char) (state, *arg++))
219 if(flags & minus_flag)
221 if((*state->append_char) (state, ' '))
227 append_char(struct state *state,
232 while(!(flags & minus_flag) && --width > 0)
233 if((*state->append_char) (state, ' '))
236 if((*state->append_char) (state, arg))
238 while((flags & minus_flag) && --width > 0)
239 if((*state->append_char) (state, ' '))
246 * This can't be made into a function...
249 #define PARSE_INT_FORMAT(res, arg, unsig) \
251 res = (unsig long)va_arg(arg, unsig long); \
252 else if (short_flag) \
253 res = (unsig short)va_arg(arg, unsig int); \
255 res = (unsig int)va_arg(arg, unsig int)
258 * zyxprintf - return 0 or -1
262 xyzprintf (struct state *state, const char *char_format, va_list ap)
264 const unsigned char *format = (const unsigned char *)char_format;
267 while((c = *format++)) {
276 while((c = *format++)){
284 flags |= alternate_flag;
291 if((flags & space_flag) && (flags & plus_flag))
294 if((flags & minus_flag) && (flags & zero_flag))
300 width = width * 10 + c - '0';
304 width = va_arg(ap, int);
314 prec = prec * 10 + c - '0';
318 prec = va_arg(ap, int);
328 } else if (c == 'l') {
335 if(append_char(state, va_arg(ap, int), width, flags))
339 if (append_string(state,
340 va_arg(ap, unsigned char*),
352 PARSE_INT_FORMAT(arg, ap, signed);
360 if (append_number (state, num, 10, "0123456789",
361 width, prec, flags, minusp))
368 PARSE_INT_FORMAT(arg, ap, unsigned);
370 if (append_number (state, arg, 10, "0123456789",
371 width, prec, flags, 0))
378 PARSE_INT_FORMAT(arg, ap, unsigned);
380 if (append_number (state, arg, 010, "01234567",
381 width, prec, flags, 0))
388 PARSE_INT_FORMAT(arg, ap, unsigned);
390 if (append_number (state, arg, 0x10, "0123456789abcdef",
391 width, prec, flags, 0))
398 PARSE_INT_FORMAT(arg, ap, unsigned);
400 if (append_number (state, arg, 0x10, "0123456789ABCDEF",
401 width, prec, flags, 0))
406 unsigned long arg = (unsigned long)va_arg(ap, void*);
408 if (append_number (state, arg, 0x10, "0123456789ABCDEF",
409 width, prec, flags, 0))
414 int *arg = va_arg(ap, int *);
415 *arg = state->s - state->str;
422 if ((*state->append_char)(state, c))
426 if ( (*state->append_char)(state, '%')
427 || (*state->append_char)(state, c))
432 if ((*state->append_char) (state, c))
439 #ifndef HAVE_ASPRINTF
441 asprintf (char **ret, const char *format, ...)
446 va_start(args, format);
447 val = vasprintf (ret, format, args);
453 tmp = malloc (val + 1);
457 ret2 = vsprintf (tmp, format, args);
458 if (val != ret2 || strcmp(*ret, tmp))
469 #ifndef HAVE_VASNPRINTF
471 nd_vasnprintf (char **ret, size_t max_sz, const char *format, va_list args)
477 state.max_sz = max_sz;
479 state.str = malloc(state.sz);
480 if (state.str == NULL) {
485 state.theend = state.s + state.sz - 1;
486 state.append_char = as_append_char;
487 state.reserve = as_reserve;
489 st = xyzprintf (&state, format, args);
498 len = state.s - state.str;
499 tmp = realloc (state.str, len+1);