1 /* crypto/bio/b_print.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59 /* disable assert() unless BIO_DEBUG has been defined */
60 #ifndef BIO_DEBUG
61 # ifndef NDEBUG
62 # define NDEBUG
63 # endif
64 #endif
65
66 /*
67 * Stolen from tjh's ssl/ssl_trc.c stuff.
68 */
69
70 #include <stdio.h>
71 #include <string.h>
72 #include <ctype.h>
73 #include <assert.h>
74 #include <limits.h>
75 #include "cryptlib.h"
76 #ifndef NO_SYS_TYPES_H
77 #include <sys/types.h>
78 #endif
79 #include <openssl/bn.h> /* To get BN_LLONG properly defined */
80 #include <openssl/bio.h>
81
82 #if defined(BN_LLONG) || defined(SIXTY_FOUR_BIT)
83 # ifndef HAVE_LONG_LONG
84 # define HAVE_LONG_LONG 1
85 # endif
86 #endif
87
88 /***************************************************************************/
89
90 /*
91 * Copyright Patrick Powell 1995
92 * This code is based on code written by Patrick Powell <papowell@astart.com>
93 * It may be used for any purpose as long as this notice remains intact
94 * on all source code distributions.
95 */
96
97 /*
98 * This code contains numerious changes and enhancements which were
99 * made by lots of contributors over the last years to Patrick Powell's
100 * original code:
101 *
102 * o Patrick Powell <papowell@astart.com> (1995)
103 * o Brandon Long <blong@fiction.net> (1996, for Mutt)
104 * o Thomas Roessler <roessler@guug.de> (1998, for Mutt)
105 * o Michael Elkins <me@cs.hmc.edu> (1998, for Mutt)
106 * o Andrew Tridgell <tridge@samba.org> (1998, for Samba)
107 * o Luke Mewburn <lukem@netbsd.org> (1999, for LukemFTP)
108 * o Ralf S. Engelschall <rse@engelschall.com> (1999, for Pth)
109 * o ... (for OpenSSL)
110 */
111
112 #ifdef HAVE_LONG_DOUBLE
113 #define LDOUBLE long double
114 #else
115 #define LDOUBLE double
116 #endif
117
118 #ifdef HAVE_LONG_LONG
119 # if defined(_WIN32) && !defined(__GNUC__)
120 # define LLONG __int64
121 # else
122 # define LLONG long long
123 # endif
124 #else
125 #define LLONG long
126 #endif
127
128 static void fmtstr (char **, char **, size_t *, size_t *,
129 const char *, int, int, int);
130 static void fmtint (char **, char **, size_t *, size_t *,
131 LLONG, int, int, int, int);
132 static void fmtfp (char **, char **, size_t *, size_t *,
133 LDOUBLE, int, int, int);
134 static void doapr_outch (char **, char **, size_t *, size_t *, int);
135 static void _dopr(char **sbuffer, char **buffer,
136 size_t *maxlen, size_t *retlen, int *truncated,
137 const char *format, va_list args);
138
139 /* format read states */
140 #define DP_S_DEFAULT 0
141 #define DP_S_FLAGS 1
142 #define DP_S_MIN 2
143 #define DP_S_DOT 3
144 #define DP_S_MAX 4
145 #define DP_S_MOD 5
146 #define DP_S_CONV 6
147 #define DP_S_DONE 7
148
149 /* format flags - Bits */
150 #define DP_F_MINUS (1 << 0)
151 #define DP_F_PLUS (1 << 1)
152 #define DP_F_SPACE (1 << 2)
153 #define DP_F_NUM (1 << 3)
154 #define DP_F_ZERO (1 << 4)
155 #define DP_F_UP (1 << 5)
156 #define DP_F_UNSIGNED (1 << 6)
157
158 /* conversion flags */
159 #define DP_C_SHORT 1
160 #define DP_C_LONG 2
161 #define DP_C_LDOUBLE 3
162 #define DP_C_LLONG 4
163
164 /* some handy macros */
165 #define char_to_int(p) (p - '0')
166 #define OSSL_MAX(p,q) ((p >= q) ? p : q)
167
168 static void
169 _dopr(
170 char **sbuffer,
171 char **buffer,
172 size_t *maxlen,
173 size_t *retlen,
174 int *truncated,
175 const char *format,
176 va_list args)
177 {
178 char ch;
179 LLONG value;
180 LDOUBLE fvalue;
181 char *strvalue;
182 int min;
183 int max;
184 int state;
185 int flags;
186 int cflags;
187 size_t currlen;
188
189 state = DP_S_DEFAULT;
190 flags = currlen = cflags = min = 0;
191 max = -1;
192 ch = *format++;
193
194 while (state != DP_S_DONE) {
195 if (ch == '\0' || (buffer == NULL && currlen >= *maxlen))
196 state = DP_S_DONE;
197
198 switch (state) {
199 case DP_S_DEFAULT:
200 if (ch == '%')
201 state = DP_S_FLAGS;
202 else
203 doapr_outch(sbuffer,buffer, &currlen, maxlen, ch);
204 ch = *format++;
205 break;
206 case DP_S_FLAGS:
207 switch (ch) {
208 case '-':
209 flags |= DP_F_MINUS;
210 ch = *format++;
211 break;
212 case '+':
213 flags |= DP_F_PLUS;
214 ch = *format++;
215 break;
216 case ' ':
217 flags |= DP_F_SPACE;
218 ch = *format++;
219 break;
220 case '#':
221 flags |= DP_F_NUM;
222 ch = *format++;
223 break;
224 case '0':
225 flags |= DP_F_ZERO;
226 ch = *format++;
227 break;
228 default:
229 state = DP_S_MIN;
230 break;
231 }
232 break;
233 case DP_S_MIN:
234 if (isdigit((unsigned char)ch)) {
235 min = 10 * min + char_to_int(ch);
236 ch = *format++;
237 } else if (ch == '*') {
238 min = va_arg(args, int);
239 ch = *format++;
240 state = DP_S_DOT;
241 } else
242 state = DP_S_DOT;
243 break;
244 case DP_S_DOT:
245 if (ch == '.') {
246 state = DP_S_MAX;
247 ch = *format++;
248 } else
249 state = DP_S_MOD;
250 break;
251 case DP_S_MAX:
252 if (isdigit((unsigned char)ch)) {
253 if (max < 0)
254 max = 0;
255 max = 10 * max + char_to_int(ch);
256 ch = *format++;
257 } else if (ch == '*') {
258 max = va_arg(args, int);
259 ch = *format++;
260 state = DP_S_MOD;
261 } else
262 state = DP_S_MOD;
263 break;
264 case DP_S_MOD:
265 switch (ch) {
266 case 'h':
267 cflags = DP_C_SHORT;
268 ch = *format++;
269 break;
270 case 'l':
271 if (*format == 'l') {
272 cflags = DP_C_LLONG;
273 format++;
274 } else
275 cflags = DP_C_LONG;
276 ch = *format++;
277 break;
278 case 'q':
279 cflags = DP_C_LLONG;
280 ch = *format++;
281 break;
282 case 'L':
283 cflags = DP_C_LDOUBLE;
284 ch = *format++;
285 break;
286 default:
287 break;
288 }
289 state = DP_S_CONV;
290 break;
291 case DP_S_CONV:
292 switch (ch) {
293 case 'd':
294 case 'i':
295 switch (cflags) {
296 case DP_C_SHORT:
297 value = (short int)va_arg(args, int);
298 break;
299 case DP_C_LONG:
300 value = va_arg(args, long int);
301 break;
302 case DP_C_LLONG:
303 value = va_arg(args, LLONG);
304 break;
305 default:
306 value = va_arg(args, int);
307 break;
308 }
309 fmtint(sbuffer, buffer, &currlen, maxlen,
310 value, 10, min, max, flags);
311 break;
312 case 'X':
313 flags |= DP_F_UP;
314 /* FALLTHROUGH */
315 case 'x':
316 case 'o':
317 case 'u':
318 flags |= DP_F_UNSIGNED;
319 switch (cflags) {
320 case DP_C_SHORT:
321 value = (unsigned short int)va_arg(args, unsigned int);
322 break;
323 case DP_C_LONG:
324 value = (LLONG) va_arg(args,
325 unsigned long int);
326 break;
327 case DP_C_LLONG:
328 value = va_arg(args, unsigned LLONG);
329 break;
330 default:
331 value = (LLONG) va_arg(args,
332 unsigned int);
333 break;
334 }
335 fmtint(sbuffer, buffer, &currlen, maxlen, value,
336 ch == 'o' ? 8 : (ch == 'u' ? 10 : 16),
337 min, max, flags);
338 break;
339 case 'f':
340 if (cflags == DP_C_LDOUBLE)
341 fvalue = va_arg(args, LDOUBLE);
342 else
343 fvalue = va_arg(args, double);
344 fmtfp(sbuffer, buffer, &currlen, maxlen,
345 fvalue, min, max, flags);
346 break;
347 case 'E':
348 flags |= DP_F_UP;
349 case 'e':
350 if (cflags == DP_C_LDOUBLE)
351 fvalue = va_arg(args, LDOUBLE);
352 else
353 fvalue = va_arg(args, double);
354 break;
355 case 'G':
356 flags |= DP_F_UP;
357 case 'g':
358 if (cflags == DP_C_LDOUBLE)
359 fvalue = va_arg(args, LDOUBLE);
360 else
361 fvalue = va_arg(args, double);
362 break;
363 case 'c':
364 doapr_outch(sbuffer, buffer, &currlen, maxlen,
365 va_arg(args, int));
366 break;
367 case 's':
368 strvalue = va_arg(args, char *);
369 if (max < 0) {
370 if (buffer)
371 max = INT_MAX;
372 else
373 max = *maxlen;
374 }
375 fmtstr(sbuffer, buffer, &currlen, maxlen, strvalue,
376 flags, min, max);
377 break;
378 case 'p':
379 value = (long)va_arg(args, void *);
380 fmtint(sbuffer, buffer, &currlen, maxlen,
381 value, 16, min, max, flags|DP_F_NUM);
382 break;
383 case 'n': /* XXX */
384 if (cflags == DP_C_SHORT) {
385 short int *num;
386 num = va_arg(args, short int *);
387 *num = currlen;
388 } else if (cflags == DP_C_LONG) { /* XXX */
389 long int *num;
390 num = va_arg(args, long int *);
391 *num = (long int) currlen;
392 } else if (cflags == DP_C_LLONG) { /* XXX */
393 LLONG *num;
394 num = va_arg(args, LLONG *);
395 *num = (LLONG) currlen;
396 } else {
397 int *num;
398 num = va_arg(args, int *);
399 *num = currlen;
400 }
401 break;
402 case '%':
403 doapr_outch(sbuffer, buffer, &currlen, maxlen, ch);
404 break;
405 case 'w':
406 /* not supported yet, treat as next char */
407 ch = *format++;
408 break;
409 default:
410 /* unknown, skip */
411 break;
412 }
413 ch = *format++;
414 state = DP_S_DEFAULT;
415 flags = cflags = min = 0;
416 max = -1;
417 break;
418 case DP_S_DONE:
419 break;
420 default:
421 break;
422 }
423 }
424 *truncated = (currlen > *maxlen - 1);
425 if (*truncated)
426 currlen = *maxlen - 1;
427 doapr_outch(sbuffer, buffer, &currlen, maxlen, '\0');
428 *retlen = currlen - 1;
429 return;
430 }
431
432 static void
433 fmtstr(
434 char **sbuffer,
435 char **buffer,
436 size_t *currlen,
437 size_t *maxlen,
438 const char *value,
439 int flags,
440 int min,
441 int max)
442 {
443 int padlen, strln;
444 int cnt = 0;
445
446 if (value == 0)
447 value = "<NULL>";
448 for (strln = 0; value[strln]; ++strln)
449 ;
450 padlen = min - strln;
451 if (padlen < 0)
452 padlen = 0;
453 if (flags & DP_F_MINUS)
454 padlen = -padlen;
455
456 while ((padlen > 0) && (cnt < max)) {
457 doapr_outch(sbuffer, buffer, currlen, maxlen, ' ');
458 --padlen;
459 ++cnt;
460 }
461 while (*value && (cnt < max)) {
462 doapr_outch(sbuffer, buffer, currlen, maxlen, *value++);
463 ++cnt;
464 }
465 while ((padlen < 0) && (cnt < max)) {
466 doapr_outch(sbuffer, buffer, currlen, maxlen, ' ');
467 ++padlen;
468 ++cnt;
469 }
470 }
471
472 static void
473 fmtint(
474 char **sbuffer,
475 char **buffer,
476 size_t *currlen,
477 size_t *maxlen,
478 LLONG value,
479 int base,
480 int min,
481 int max,
482 int flags)
483 {
484 int signvalue = 0;
485 const char *prefix = "";
486 unsigned LLONG uvalue;
487 char convert[DECIMAL_SIZE(value)+3];
488 int place = 0;
489 int spadlen = 0;
490 int zpadlen = 0;
491 int caps = 0;
492
493 if (max < 0)
494 max = 0;
495 uvalue = value;
496 if (!(flags & DP_F_UNSIGNED)) {
497 if (value < 0) {
498 signvalue = '-';
499 uvalue = -value;
500 } else if (flags & DP_F_PLUS)
501 signvalue = '+';
502 else if (flags & DP_F_SPACE)
503 signvalue = ' ';
504 }
505 if (flags & DP_F_NUM) {
506 if (base == 8) prefix = "0";
507 if (base == 16) prefix = "0x";
508 }
509 if (flags & DP_F_UP)
510 caps = 1;
511 do {
512 convert[place++] =
513 (caps ? "0123456789ABCDEF" : "0123456789abcdef")
514 [uvalue % (unsigned) base];
515 uvalue = (uvalue / (unsigned) base);
516 } while (uvalue && (place < (int)sizeof(convert)));
517 if (place == sizeof(convert))
518 place--;
519 convert[place] = 0;
520
521 zpadlen = max - place;
522 spadlen = min - OSSL_MAX(max, place) - (signvalue ? 1 : 0) - strlen(prefix);
523 if (zpadlen < 0)
524 zpadlen = 0;
525 if (spadlen < 0)
526 spadlen = 0;
527 if (flags & DP_F_ZERO) {
528 zpadlen = OSSL_MAX(zpadlen, spadlen);
529 spadlen = 0;
530 }
531 if (flags & DP_F_MINUS)
532 spadlen = -spadlen;
533
534 /* spaces */
535 while (spadlen > 0) {
536 doapr_outch(sbuffer, buffer, currlen, maxlen, ' ');
537 --spadlen;
538 }
539
540 /* sign */
541 if (signvalue)
542 doapr_outch(sbuffer, buffer, currlen, maxlen, signvalue);
543
544 /* prefix */
545 while (*prefix) {
546 doapr_outch(sbuffer, buffer, currlen, maxlen, *prefix);
547 prefix++;
548 }
549
550 /* zeros */
551 if (zpadlen > 0) {
552 while (zpadlen > 0) {
553 doapr_outch(sbuffer, buffer, currlen, maxlen, '0');
554 --zpadlen;
555 }
556 }
557 /* digits */
558 while (place > 0)
559 doapr_outch(sbuffer, buffer, currlen, maxlen, convert[--place]);
560
561 /* left justified spaces */
562 while (spadlen < 0) {
563 doapr_outch(sbuffer, buffer, currlen, maxlen, ' ');
564 ++spadlen;
565 }
566 return;
567 }
568
569 static LDOUBLE
570 abs_val(LDOUBLE value)
571 {
572 LDOUBLE result = value;
573 if (value < 0)
574 result = -value;
575 return result;
576 }
577
578 static LDOUBLE
579 pow_10(int in_exp)
580 {
581 LDOUBLE result = 1;
582 while (in_exp) {
583 result *= 10;
584 in_exp--;
585 }
586 return result;
587 }
588
589 static long
590 roundv(LDOUBLE value)
591 {
592 long intpart;
593 intpart = (long) value;
594 value = value - intpart;
595 if (value >= 0.5)
596 intpart++;
597 return intpart;
598 }
599
600 static void
601 fmtfp(
602 char **sbuffer,
603 char **buffer,
604 size_t *currlen,
605 size_t *maxlen,
606 LDOUBLE fvalue,
607 int min,
608 int max,
609 int flags)
610 {
611 int signvalue = 0;
612 LDOUBLE ufvalue;
613 char iconvert[20];
614 char fconvert[20];
615 int iplace = 0;
616 int fplace = 0;
617 int padlen = 0;
618 int zpadlen = 0;
619 int caps = 0;
620 long intpart;
621 long fracpart;
622 long max10;
623
624 if (max < 0)
625 max = 6;
626 ufvalue = abs_val(fvalue);
627 if (fvalue < 0)
628 signvalue = '-';
629 else if (flags & DP_F_PLUS)
630 signvalue = '+';
631 else if (flags & DP_F_SPACE)
632 signvalue = ' ';
633
634 intpart = (long)ufvalue;
635
636 /* sorry, we only support 9 digits past the decimal because of our
637 conversion method */
638 if (max > 9)
639 max = 9;
640
641 /* we "cheat" by converting the fractional part to integer by
642 multiplying by a factor of 10 */
643 max10 = roundv(pow_10(max));
644 fracpart = roundv(pow_10(max) * (ufvalue - intpart));
645
646 if (fracpart >= max10) {
647 intpart++;
648 fracpart -= max10;
649 }
650
651 /* convert integer part */
652 do {
653 iconvert[iplace++] =
654 (caps ? "0123456789ABCDEF"
655 : "0123456789abcdef")[intpart % 10];
656 intpart = (intpart / 10);
657 } while (intpart && (iplace < (int)sizeof(iconvert)));
658 if (iplace == sizeof iconvert)
659 iplace--;
660 iconvert[iplace] = 0;
661
662 /* convert fractional part */
663 do {
664 fconvert[fplace++] =
665 (caps ? "0123456789ABCDEF"
666 : "0123456789abcdef")[fracpart % 10];
667 fracpart = (fracpart / 10);
668 } while (fplace < max);
669 if (fplace == sizeof fconvert)
670 fplace--;
671 fconvert[fplace] = 0;
672
673 /* -1 for decimal point, another -1 if we are printing a sign */
674 padlen = min - iplace - max - 1 - ((signvalue) ? 1 : 0);
675 zpadlen = max - fplace;
676 if (zpadlen < 0)
677 zpadlen = 0;
678 if (padlen < 0)
679 padlen = 0;
680 if (flags & DP_F_MINUS)
681 padlen = -padlen;
682
683 if ((flags & DP_F_ZERO) && (padlen > 0)) {
684 if (signvalue) {
685 doapr_outch(sbuffer, buffer, currlen, maxlen, signvalue);
686 --padlen;
687 signvalue = 0;
688 }
689 while (padlen > 0) {
690 doapr_outch(sbuffer, buffer, currlen, maxlen, '0');
691 --padlen;
692 }
693 }
694 while (padlen > 0) {
695 doapr_outch(sbuffer, buffer, currlen, maxlen, ' ');
696 --padlen;
697 }
698 if (signvalue)
699 doapr_outch(sbuffer, buffer, currlen, maxlen, signvalue);
700
701 while (iplace > 0)
702 doapr_outch(sbuffer, buffer, currlen, maxlen, iconvert[--iplace]);
703
704 /*
705 * Decimal point. This should probably use locale to find the correct
706 * char to print out.
707 */
708 if (max > 0 || (flags & DP_F_NUM)) {
709 doapr_outch(sbuffer, buffer, currlen, maxlen, '.');
710
711 while (fplace > 0)
712 doapr_outch(sbuffer, buffer, currlen, maxlen, fconvert[--fplace]);
713 }
714 while (zpadlen > 0) {
715 doapr_outch(sbuffer, buffer, currlen, maxlen, '0');
716 --zpadlen;
717 }
718
719 while (padlen < 0) {
720 doapr_outch(sbuffer, buffer, currlen, maxlen, ' ');
721 ++padlen;
722 }
723 }
724
725 static void
726 doapr_outch(
727 char **sbuffer,
728 char **buffer,
729 size_t *currlen,
730 size_t *maxlen,
731 int c)
732 {
733 /* If we haven't at least one buffer, someone has doe a big booboo */
734 assert(*sbuffer != NULL || buffer != NULL);
735
736 if (buffer) {
737 while (*currlen >= *maxlen) {
738 if (*buffer == NULL) {
739 if (*maxlen == 0)
740 *maxlen = 1024;
741 *buffer = OPENSSL_malloc(*maxlen);
742 if (*currlen > 0) {
743 assert(*sbuffer != NULL);
744 memcpy(*buffer, *sbuffer, *currlen);
745 }
746 *sbuffer = NULL;
747 } else {
748 *maxlen += 1024;
749 *buffer = OPENSSL_realloc(*buffer, *maxlen);
750 }
751 }
752 /* What to do if *buffer is NULL? */
753 assert(*sbuffer != NULL || *buffer != NULL);
754 }
755
756 if (*currlen < *maxlen) {
757 if (*sbuffer)
758 (*sbuffer)[(*currlen)++] = (char)c;
759 else
760 (*buffer)[(*currlen)++] = (char)c;
761 }
762
763 return;
764 }
765
766 /***************************************************************************/
767
768 int BIO_printf (BIO *bio, const char *format, ...)
769 {
770 va_list args;
771 int ret;
772
773 va_start(args, format);
774
775 ret = BIO_vprintf(bio, format, args);
776
777 va_end(args);
778 return(ret);
779 }
780
781 int BIO_vprintf (BIO *bio, const char *format, va_list args)
782 {
783 int ret;
784 size_t retlen;
785 char hugebuf[1024*2]; /* Was previously 10k, which is unreasonable
786 in small-stack environments, like threads
787 or DOS programs. */
788 char *hugebufp = hugebuf;
789 size_t hugebufsize = sizeof(hugebuf);
790 char *dynbuf = NULL;
791 int ignored;
792
793 dynbuf = NULL;
794 CRYPTO_push_info("doapr()");
795 _dopr(&hugebufp, &dynbuf, &hugebufsize,
796 &retlen, &ignored, format, args);
797 if (dynbuf)
798 {
799 ret=BIO_write(bio, dynbuf, (int)retlen);
800 OPENSSL_free(dynbuf);
801 }
802 else
803 {
804 ret=BIO_write(bio, hugebuf, (int)retlen);
805 }
806 CRYPTO_pop_info();
807 return(ret);
808 }
809
810 /* As snprintf is not available everywhere, we provide our own implementation.
811 * This function has nothing to do with BIOs, but it's closely related
812 * to BIO_printf, and we need *some* name prefix ...
813 * (XXX the function should be renamed, but to what?) */
814 int BIO_snprintf(char *buf, size_t n, const char *format, ...)
815 {
816 va_list args;
817 int ret;
818
819 va_start(args, format);
820
821 ret = BIO_vsnprintf(buf, n, format, args);
822
823 va_end(args);
824 return(ret);
825 }
826
827 int BIO_vsnprintf(char *buf, size_t n, const char *format, va_list args)
828 {
829 size_t retlen;
830 int truncated;
831
832 _dopr(&buf, NULL, &n, &retlen, &truncated, format, args);
833
834 if (truncated)
835 /* In case of truncation, return -1 like traditional snprintf.
836 * (Current drafts for ISO/IEC 9899 say snprintf should return
837 * the number of characters that would have been written,
838 * had the buffer been large enough.) */
839 return -1;
840 else
841 return (retlen <= INT_MAX) ? (int)retlen : -1;
842 }