2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
15 #include "internal/cryptlib.h"
16 #ifndef NO_SYS_TYPES_H
17 # include <sys/types.h>
19 #include <openssl/bn.h> /* To get BN_LLONG properly defined */
20 #include <openssl/bio.h>
22 #if defined(BN_LLONG) || defined(SIXTY_FOUR_BIT)
23 # ifndef HAVE_LONG_LONG
24 # define HAVE_LONG_LONG 1
29 * Copyright Patrick Powell 1995
30 * This code is based on code written by Patrick Powell <papowell@astart.com>
31 * It may be used for any purpose as long as this notice remains intact
32 * on all source code distributions.
35 #ifdef HAVE_LONG_DOUBLE
36 # define LDOUBLE long double
38 # define LDOUBLE double
42 # if defined(_WIN32) && !defined(__GNUC__)
43 # define LLONG __int64
45 # define LLONG long long
51 static int fmtstr(char **, char **, size_t *, size_t *,
52 const char *, int, int, int);
53 static int fmtint(char **, char **, size_t *, size_t *,
54 LLONG, int, int, int, int);
55 static int fmtfp(char **, char **, size_t *, size_t *,
56 LDOUBLE, int, int, int);
57 static int doapr_outch(char **, char **, size_t *, size_t *, int);
58 static int _dopr(char **sbuffer, char **buffer,
59 size_t *maxlen, size_t *retlen, int *truncated,
60 const char *format, va_list args);
62 /* format read states */
63 #define DP_S_DEFAULT 0
72 /* format flags - Bits */
73 #define DP_F_MINUS (1 << 0)
74 #define DP_F_PLUS (1 << 1)
75 #define DP_F_SPACE (1 << 2)
76 #define DP_F_NUM (1 << 3)
77 #define DP_F_ZERO (1 << 4)
78 #define DP_F_UP (1 << 5)
79 #define DP_F_UNSIGNED (1 << 6)
81 /* conversion flags */
84 #define DP_C_LDOUBLE 3
87 /* some handy macros */
88 #define char_to_int(p) (p - '0')
89 #define OSSL_MAX(p,q) ((p >= q) ? p : q)
95 size_t *retlen, int *truncated, const char *format, va_list args)
108 state = DP_S_DEFAULT;
109 flags = currlen = cflags = min = 0;
113 while (state != DP_S_DONE) {
114 if (ch == '\0' || (buffer == NULL && currlen >= *maxlen))
122 if(!doapr_outch(sbuffer, buffer, &currlen, maxlen, ch))
154 if (isdigit((unsigned char)ch)) {
155 min = 10 * min + char_to_int(ch);
157 } else if (ch == '*') {
158 min = va_arg(args, int);
172 if (isdigit((unsigned char)ch)) {
175 max = 10 * max + char_to_int(ch);
177 } else if (ch == '*') {
178 max = va_arg(args, int);
191 if (*format == 'l') {
203 cflags = DP_C_LDOUBLE;
217 value = (short int)va_arg(args, int);
220 value = va_arg(args, long int);
223 value = va_arg(args, LLONG);
226 value = va_arg(args, int);
229 if (!fmtint(sbuffer, buffer, &currlen, maxlen, value, 10, min,
239 flags |= DP_F_UNSIGNED;
242 value = (unsigned short int)va_arg(args, unsigned int);
245 value = (LLONG) va_arg(args, unsigned long int);
248 value = va_arg(args, unsigned LLONG);
251 value = (LLONG) va_arg(args, unsigned int);
254 if (!fmtint(sbuffer, buffer, &currlen, maxlen, value,
255 ch == 'o' ? 8 : (ch == 'u' ? 10 : 16),
260 if (cflags == DP_C_LDOUBLE)
261 fvalue = va_arg(args, LDOUBLE);
263 fvalue = va_arg(args, double);
264 if (!fmtfp(sbuffer, buffer, &currlen, maxlen, fvalue, min, max,
271 if (cflags == DP_C_LDOUBLE)
272 fvalue = va_arg(args, LDOUBLE);
274 fvalue = va_arg(args, double);
279 if (cflags == DP_C_LDOUBLE)
280 fvalue = va_arg(args, LDOUBLE);
282 fvalue = va_arg(args, double);
285 if(!doapr_outch(sbuffer, buffer, &currlen, maxlen,
290 strvalue = va_arg(args, char *);
297 if (!fmtstr(sbuffer, buffer, &currlen, maxlen, strvalue,
302 value = (size_t)va_arg(args, void *);
303 if (!fmtint(sbuffer, buffer, &currlen, maxlen,
304 value, 16, min, max, flags | DP_F_NUM))
308 if (cflags == DP_C_SHORT) {
310 num = va_arg(args, short int *);
312 } else if (cflags == DP_C_LONG) { /* XXX */
314 num = va_arg(args, long int *);
315 *num = (long int)currlen;
316 } else if (cflags == DP_C_LLONG) { /* XXX */
318 num = va_arg(args, LLONG *);
319 *num = (LLONG) currlen;
322 num = va_arg(args, int *);
327 if(!doapr_outch(sbuffer, buffer, &currlen, maxlen, ch))
331 /* not supported yet, treat as next char */
339 state = DP_S_DEFAULT;
340 flags = cflags = min = 0;
349 *truncated = (currlen > *maxlen - 1);
351 currlen = *maxlen - 1;
352 if(!doapr_outch(sbuffer, buffer, &currlen, maxlen, '\0'))
354 *retlen = currlen - 1;
359 fmtstr(char **sbuffer,
362 size_t *maxlen, const char *value, int flags, int min, int max)
371 strln = strlen(value);
375 padlen = min - strln;
376 if (min < 0 || padlen < 0)
378 if (flags & DP_F_MINUS)
381 while ((padlen > 0) && (cnt < max)) {
382 if(!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
387 while (*value && (cnt < max)) {
388 if(!doapr_outch(sbuffer, buffer, currlen, maxlen, *value++))
392 while ((padlen < 0) && (cnt < max)) {
393 if(!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
402 fmtint(char **sbuffer,
405 size_t *maxlen, LLONG value, int base, int min, int max, int flags)
408 const char *prefix = "";
409 unsigned LLONG uvalue;
410 char convert[DECIMAL_SIZE(value) + 3];
419 if (!(flags & DP_F_UNSIGNED)) {
423 } else if (flags & DP_F_PLUS)
425 else if (flags & DP_F_SPACE)
428 if (flags & DP_F_NUM) {
437 convert[place++] = (caps ? "0123456789ABCDEF" : "0123456789abcdef")
438 [uvalue % (unsigned)base];
439 uvalue = (uvalue / (unsigned)base);
440 } while (uvalue && (place < (int)sizeof(convert)));
441 if (place == sizeof(convert))
445 zpadlen = max - place;
447 min - OSSL_MAX(max, place) - (signvalue ? 1 : 0) - strlen(prefix);
452 if (flags & DP_F_ZERO) {
453 zpadlen = OSSL_MAX(zpadlen, spadlen);
456 if (flags & DP_F_MINUS)
460 while (spadlen > 0) {
461 if(!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
468 if(!doapr_outch(sbuffer, buffer, currlen, maxlen, signvalue))
473 if(!doapr_outch(sbuffer, buffer, currlen, maxlen, *prefix))
480 while (zpadlen > 0) {
481 if(!doapr_outch(sbuffer, buffer, currlen, maxlen, '0'))
488 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, convert[--place]))
492 /* left justified spaces */
493 while (spadlen < 0) {
494 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
501 static LDOUBLE abs_val(LDOUBLE value)
503 LDOUBLE result = value;
509 static LDOUBLE pow_10(int in_exp)
519 static long roundv(LDOUBLE value)
522 intpart = (long)value;
523 value = value - intpart;
530 fmtfp(char **sbuffer,
533 size_t *maxlen, LDOUBLE fvalue, int min, int max, int flags)
549 ufvalue = abs_val(fvalue);
552 else if (flags & DP_F_PLUS)
554 else if (flags & DP_F_SPACE)
557 intpart = (long)ufvalue;
560 * sorry, we only support 9 digits past the decimal because of our
567 * we "cheat" by converting the fractional part to integer by multiplying
570 max10 = roundv(pow_10(max));
571 fracpart = roundv(pow_10(max) * (ufvalue - intpart));
573 if (fracpart >= max10) {
578 /* convert integer part */
580 iconvert[iplace++] = "0123456789"[intpart % 10];
581 intpart = (intpart / 10);
582 } while (intpart && (iplace < (int)sizeof(iconvert)));
583 if (iplace == sizeof iconvert)
585 iconvert[iplace] = 0;
587 /* convert fractional part */
589 fconvert[fplace++] = "0123456789"[fracpart % 10];
590 fracpart = (fracpart / 10);
591 } while (fplace < max);
592 if (fplace == sizeof fconvert)
594 fconvert[fplace] = 0;
596 /* -1 for decimal point, another -1 if we are printing a sign */
597 padlen = min - iplace - max - 1 - ((signvalue) ? 1 : 0);
598 zpadlen = max - fplace;
603 if (flags & DP_F_MINUS)
606 if ((flags & DP_F_ZERO) && (padlen > 0)) {
608 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, signvalue))
614 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '0'))
620 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
624 if (signvalue && !doapr_outch(sbuffer, buffer, currlen, maxlen, signvalue))
628 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, iconvert[--iplace]))
633 * Decimal point. This should probably use locale to find the correct
636 if (max > 0 || (flags & DP_F_NUM)) {
637 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '.'))
641 if(!doapr_outch(sbuffer, buffer, currlen, maxlen,
646 while (zpadlen > 0) {
647 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '0'))
653 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
660 #define BUFFER_INC 1024
663 doapr_outch(char **sbuffer,
664 char **buffer, size_t *currlen, size_t *maxlen, int c)
666 /* If we haven't at least one buffer, someone has doe a big booboo */
667 assert(*sbuffer != NULL || buffer != NULL);
669 /* |currlen| must always be <= |*maxlen| */
670 assert(*currlen <= *maxlen);
672 if (buffer && *currlen == *maxlen) {
673 if (*maxlen > INT_MAX - BUFFER_INC)
676 *maxlen += BUFFER_INC;
677 if (*buffer == NULL) {
678 *buffer = OPENSSL_malloc(*maxlen);
682 assert(*sbuffer != NULL);
683 memcpy(*buffer, *sbuffer, *currlen);
688 tmpbuf = OPENSSL_realloc(*buffer, *maxlen);
695 if (*currlen < *maxlen) {
697 (*sbuffer)[(*currlen)++] = (char)c;
699 (*buffer)[(*currlen)++] = (char)c;
705 /***************************************************************************/
707 int BIO_printf(BIO *bio, const char *format, ...)
712 va_start(args, format);
714 ret = BIO_vprintf(bio, format, args);
720 int BIO_vprintf(BIO *bio, const char *format, va_list args)
724 char hugebuf[1024 * 2]; /* Was previously 10k, which is unreasonable
725 * in small-stack environments, like threads
726 * or DOS programs. */
727 char *hugebufp = hugebuf;
728 size_t hugebufsize = sizeof(hugebuf);
733 if (!_dopr(&hugebufp, &dynbuf, &hugebufsize, &retlen, &ignored, format,
735 OPENSSL_free(dynbuf);
739 ret = BIO_write(bio, dynbuf, (int)retlen);
740 OPENSSL_free(dynbuf);
742 ret = BIO_write(bio, hugebuf, (int)retlen);
748 * As snprintf is not available everywhere, we provide our own
749 * implementation. This function has nothing to do with BIOs, but it's
750 * closely related to BIO_printf, and we need *some* name prefix ... (XXX the
751 * function should be renamed, but to what?)
753 int BIO_snprintf(char *buf, size_t n, const char *format, ...)
758 va_start(args, format);
760 ret = BIO_vsnprintf(buf, n, format, args);
766 int BIO_vsnprintf(char *buf, size_t n, const char *format, va_list args)
771 if(!_dopr(&buf, NULL, &n, &retlen, &truncated, format, args))
776 * In case of truncation, return -1 like traditional snprintf.
777 * (Current drafts for ISO/IEC 9899 say snprintf should return the
778 * number of characters that would have been written, had the buffer
779 * been large enough.)
783 return (retlen <= INT_MAX) ? (int)retlen : -1;