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
13 #include "internal/numbers.h"
14 #include "internal/cryptlib.h"
15 #ifndef NO_SYS_TYPES_H
16 # include <sys/types.h>
18 #include <openssl/bn.h> /* To get BN_LLONG properly defined */
19 #include <openssl/bio.h>
21 #if defined(BN_LLONG) || defined(SIXTY_FOUR_BIT)
22 # ifndef HAVE_LONG_LONG
23 # define HAVE_LONG_LONG 1
28 * Copyright Patrick Powell 1995
29 * This code is based on code written by Patrick Powell <papowell@astart.com>
30 * It may be used for any purpose as long as this notice remains intact
31 * on all source code distributions.
34 #ifdef HAVE_LONG_DOUBLE
35 # define LDOUBLE long double
37 # define LDOUBLE double
41 # if defined(_WIN32) && !defined(__GNUC__)
42 # define LLONG __int64
44 # define LLONG long long
50 static int fmtstr(char **, char **, size_t *, size_t *,
51 const char *, int, int, int);
52 static int fmtint(char **, char **, size_t *, size_t *,
53 LLONG, int, int, int, int);
54 static int fmtfp(char **, char **, size_t *, size_t *,
55 LDOUBLE, int, int, int, int);
56 static int doapr_outch(char **, char **, size_t *, size_t *, int);
57 static int _dopr(char **sbuffer, char **buffer,
58 size_t *maxlen, size_t *retlen, int *truncated,
59 const char *format, va_list args);
61 /* format read states */
62 #define DP_S_DEFAULT 0
71 /* format flags - Bits */
72 /* left-aligned padding */
73 #define DP_F_MINUS (1 << 0)
74 /* print an explicit '+' for a value with positive sign */
75 #define DP_F_PLUS (1 << 1)
76 /* print an explicit ' ' for a value with positive sign */
77 #define DP_F_SPACE (1 << 2)
78 /* print 0/0x prefix for octal/hex and decimal point for floating point */
79 #define DP_F_NUM (1 << 3)
80 /* print leading zeroes */
81 #define DP_F_ZERO (1 << 4)
82 /* print HEX in UPPPERcase */
83 #define DP_F_UP (1 << 5)
84 /* treat value as unsigned */
85 #define DP_F_UNSIGNED (1 << 6)
87 /* conversion flags */
90 #define DP_C_LDOUBLE 3
93 /* Floating point formats */
98 /* some handy macros */
99 #define char_to_int(p) (p - '0')
100 #define OSSL_MAX(p,q) ((p >= q) ? p : q)
103 _dopr(char **sbuffer,
106 size_t *retlen, int *truncated, const char *format, va_list args)
119 state = DP_S_DEFAULT;
120 flags = currlen = cflags = min = 0;
124 while (state != DP_S_DONE) {
125 if (ch == '\0' || (buffer == NULL && currlen >= *maxlen))
133 if(!doapr_outch(sbuffer, buffer, &currlen, maxlen, ch))
165 if (isdigit((unsigned char)ch)) {
166 min = 10 * min + char_to_int(ch);
168 } else if (ch == '*') {
169 min = va_arg(args, int);
183 if (isdigit((unsigned char)ch)) {
186 max = 10 * max + char_to_int(ch);
188 } else if (ch == '*') {
189 max = va_arg(args, int);
202 if (*format == 'l') {
214 cflags = DP_C_LDOUBLE;
228 value = (short int)va_arg(args, int);
231 value = va_arg(args, long int);
234 value = va_arg(args, LLONG);
237 value = va_arg(args, int);
240 if (!fmtint(sbuffer, buffer, &currlen, maxlen, value, 10, min,
250 flags |= DP_F_UNSIGNED;
253 value = (unsigned short int)va_arg(args, unsigned int);
256 value = (LLONG) va_arg(args, unsigned long int);
259 value = va_arg(args, unsigned LLONG);
262 value = (LLONG) va_arg(args, unsigned int);
265 if (!fmtint(sbuffer, buffer, &currlen, maxlen, value,
266 ch == 'o' ? 8 : (ch == 'u' ? 10 : 16),
271 if (cflags == DP_C_LDOUBLE)
272 fvalue = va_arg(args, LDOUBLE);
274 fvalue = va_arg(args, double);
275 if (!fmtfp(sbuffer, buffer, &currlen, maxlen, fvalue, min, max,
282 if (cflags == DP_C_LDOUBLE)
283 fvalue = va_arg(args, LDOUBLE);
285 fvalue = va_arg(args, double);
286 if (!fmtfp(sbuffer, buffer, &currlen, maxlen, fvalue, min, max,
293 if (cflags == DP_C_LDOUBLE)
294 fvalue = va_arg(args, LDOUBLE);
296 fvalue = va_arg(args, double);
297 if (!fmtfp(sbuffer, buffer, &currlen, maxlen, fvalue, min, max,
302 if(!doapr_outch(sbuffer, buffer, &currlen, maxlen,
307 strvalue = va_arg(args, char *);
314 if (!fmtstr(sbuffer, buffer, &currlen, maxlen, strvalue,
319 value = (size_t)va_arg(args, void *);
320 if (!fmtint(sbuffer, buffer, &currlen, maxlen,
321 value, 16, min, max, flags | DP_F_NUM))
325 if (cflags == DP_C_SHORT) {
327 num = va_arg(args, short int *);
329 } else if (cflags == DP_C_LONG) { /* XXX */
331 num = va_arg(args, long int *);
332 *num = (long int)currlen;
333 } else if (cflags == DP_C_LLONG) { /* XXX */
335 num = va_arg(args, LLONG *);
336 *num = (LLONG) currlen;
339 num = va_arg(args, int *);
344 if(!doapr_outch(sbuffer, buffer, &currlen, maxlen, ch))
348 /* not supported yet, treat as next char */
356 state = DP_S_DEFAULT;
357 flags = cflags = min = 0;
367 * We have to truncate if there is no dynamic buffer and we have filled the
370 if (buffer == NULL) {
371 *truncated = (currlen > *maxlen - 1);
373 currlen = *maxlen - 1;
375 if(!doapr_outch(sbuffer, buffer, &currlen, maxlen, '\0'))
377 *retlen = currlen - 1;
382 fmtstr(char **sbuffer,
385 size_t *maxlen, const char *value, int flags, int min, int max)
394 strln = OPENSSL_strnlen(value, max < 0 ? SIZE_MAX : (size_t)max);
396 padlen = min - strln;
397 if (min < 0 || padlen < 0)
401 * Calculate the maximum output including padding.
402 * Make sure max doesn't overflow into negativity
404 if (max < INT_MAX - padlen)
409 if (flags & DP_F_MINUS)
412 while ((padlen > 0) && (max < 0 || cnt < max)) {
413 if(!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
418 while (strln > 0 && (max < 0 || cnt < max)) {
419 if(!doapr_outch(sbuffer, buffer, currlen, maxlen, *value++))
424 while ((padlen < 0) && (max < 0 || cnt < max)) {
425 if(!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
434 fmtint(char **sbuffer,
437 size_t *maxlen, LLONG value, int base, int min, int max, int flags)
440 const char *prefix = "";
441 unsigned LLONG uvalue;
442 char convert[DECIMAL_SIZE(value) + 3];
451 if (!(flags & DP_F_UNSIGNED)) {
454 uvalue = 0 - (unsigned LLONG)value;
455 } else if (flags & DP_F_PLUS)
457 else if (flags & DP_F_SPACE)
460 if (flags & DP_F_NUM) {
469 convert[place++] = (caps ? "0123456789ABCDEF" : "0123456789abcdef")
470 [uvalue % (unsigned)base];
471 uvalue = (uvalue / (unsigned)base);
472 } while (uvalue && (place < (int)sizeof(convert)));
473 if (place == sizeof(convert))
477 zpadlen = max - place;
479 min - OSSL_MAX(max, place) - (signvalue ? 1 : 0) - strlen(prefix);
484 if (flags & DP_F_ZERO) {
485 zpadlen = OSSL_MAX(zpadlen, spadlen);
488 if (flags & DP_F_MINUS)
492 while (spadlen > 0) {
493 if(!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
500 if(!doapr_outch(sbuffer, buffer, currlen, maxlen, signvalue))
505 if(!doapr_outch(sbuffer, buffer, currlen, maxlen, *prefix))
512 while (zpadlen > 0) {
513 if(!doapr_outch(sbuffer, buffer, currlen, maxlen, '0'))
520 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, convert[--place]))
524 /* left justified spaces */
525 while (spadlen < 0) {
526 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
533 static LDOUBLE abs_val(LDOUBLE value)
535 LDOUBLE result = value;
541 static LDOUBLE pow_10(int in_exp)
551 static long roundv(LDOUBLE value)
554 intpart = (long)value;
555 value = value - intpart;
562 fmtfp(char **sbuffer,
565 size_t *maxlen, LDOUBLE fvalue, int min, int max, int flags, int style)
579 unsigned long intpart;
580 unsigned long fracpart;
589 else if (flags & DP_F_PLUS)
591 else if (flags & DP_F_SPACE)
595 * G_FORMAT sometimes prints like E_FORMAT and sometimes like F_FORMAT
596 * depending on the number to be printed. Work out which one it is and use
599 if (style == G_FORMAT) {
601 realstyle = F_FORMAT;
602 } else if (fvalue < 0.0001) {
603 realstyle = E_FORMAT;
604 } else if ((max == 0 && fvalue >= 10)
605 || (max > 0 && fvalue >= pow_10(max))) {
606 realstyle = E_FORMAT;
608 realstyle = F_FORMAT;
614 if (style != F_FORMAT) {
616 /* Calculate the exponent */
618 while (tmpvalue < 1) {
622 while (tmpvalue > 10) {
627 if (style == G_FORMAT) {
629 * In G_FORMAT the "precision" represents significant digits. We
630 * always have at least 1 significant digit.
634 /* Now convert significant digits to decimal places */
635 if (realstyle == F_FORMAT) {
639 * Should not happen. If we're in F_FORMAT then exp < max?
645 * In E_FORMAT there is always one significant digit in front
646 * of the decimal point, so:
647 * significant digits == 1 + decimal places
652 if (realstyle == E_FORMAT)
655 ufvalue = abs_val(fvalue);
656 if (ufvalue > ULONG_MAX) {
660 intpart = (unsigned long)ufvalue;
663 * sorry, we only support 9 digits past the decimal because of our
670 * we "cheat" by converting the fractional part to integer by multiplying
673 max10 = roundv(pow_10(max));
674 fracpart = roundv(pow_10(max) * (ufvalue - intpart));
676 if (fracpart >= max10) {
681 /* convert integer part */
683 iconvert[iplace++] = "0123456789"[intpart % 10];
684 intpart = (intpart / 10);
685 } while (intpart && (iplace < (int)sizeof(iconvert)));
686 if (iplace == sizeof iconvert)
688 iconvert[iplace] = 0;
690 /* convert fractional part */
691 while (fplace < max) {
692 if (style == G_FORMAT && fplace == 0 && (fracpart % 10) == 0) {
693 /* We strip trailing zeros in G_FORMAT */
695 fracpart = fracpart / 10;
700 fconvert[fplace++] = "0123456789"[fracpart % 10];
701 fracpart = (fracpart / 10);
704 if (fplace == sizeof fconvert)
706 fconvert[fplace] = 0;
708 /* convert exponent part */
709 if (realstyle == E_FORMAT) {
717 econvert[eplace++] = "0123456789"[tmpexp % 10];
718 tmpexp = (tmpexp / 10);
719 } while (tmpexp > 0 && eplace < (int)sizeof(econvert));
720 /* Exponent is huge!! Too big to print */
723 /* Add a leading 0 for single digit exponents */
725 econvert[eplace++] = '0';
729 * -1 for decimal point (if we have one, i.e. max > 0),
730 * another -1 if we are printing a sign
732 padlen = min - iplace - max - (max > 0 ? 1 : 0) - ((signvalue) ? 1 : 0);
733 /* Take some off for exponent prefix "+e" and exponent */
734 if (realstyle == E_FORMAT)
735 padlen -= 2 + eplace;
736 zpadlen = max - fplace;
741 if (flags & DP_F_MINUS)
744 if ((flags & DP_F_ZERO) && (padlen > 0)) {
746 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, signvalue))
752 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '0'))
758 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
762 if (signvalue && !doapr_outch(sbuffer, buffer, currlen, maxlen, signvalue))
766 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, iconvert[--iplace]))
771 * Decimal point. This should probably use locale to find the correct
774 if (max > 0 || (flags & DP_F_NUM)) {
775 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '.'))
779 if(!doapr_outch(sbuffer, buffer, currlen, maxlen,
784 while (zpadlen > 0) {
785 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '0'))
789 if (realstyle == E_FORMAT) {
792 if ((flags & DP_F_UP) == 0)
796 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, ech))
799 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '-'))
802 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '+'))
806 if (!doapr_outch(sbuffer, buffer, currlen, maxlen,
813 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
820 #define BUFFER_INC 1024
823 doapr_outch(char **sbuffer,
824 char **buffer, size_t *currlen, size_t *maxlen, int c)
826 /* If we haven't at least one buffer, someone has doe a big booboo */
827 OPENSSL_assert(*sbuffer != NULL || buffer != NULL);
829 /* |currlen| must always be <= |*maxlen| */
830 OPENSSL_assert(*currlen <= *maxlen);
832 if (buffer && *currlen == *maxlen) {
833 if (*maxlen > INT_MAX - BUFFER_INC)
836 *maxlen += BUFFER_INC;
837 if (*buffer == NULL) {
838 *buffer = OPENSSL_malloc(*maxlen);
842 OPENSSL_assert(*sbuffer != NULL);
843 memcpy(*buffer, *sbuffer, *currlen);
848 tmpbuf = OPENSSL_realloc(*buffer, *maxlen);
855 if (*currlen < *maxlen) {
857 (*sbuffer)[(*currlen)++] = (char)c;
859 (*buffer)[(*currlen)++] = (char)c;
865 /***************************************************************************/
867 int BIO_printf(BIO *bio, const char *format, ...)
872 va_start(args, format);
874 ret = BIO_vprintf(bio, format, args);
880 int BIO_vprintf(BIO *bio, const char *format, va_list args)
884 char hugebuf[1024 * 2]; /* Was previously 10k, which is unreasonable
885 * in small-stack environments, like threads
886 * or DOS programs. */
887 char *hugebufp = hugebuf;
888 size_t hugebufsize = sizeof(hugebuf);
893 if (!_dopr(&hugebufp, &dynbuf, &hugebufsize, &retlen, &ignored, format,
895 OPENSSL_free(dynbuf);
899 ret = BIO_write(bio, dynbuf, (int)retlen);
900 OPENSSL_free(dynbuf);
902 ret = BIO_write(bio, hugebuf, (int)retlen);
908 * As snprintf is not available everywhere, we provide our own
909 * implementation. This function has nothing to do with BIOs, but it's
910 * closely related to BIO_printf, and we need *some* name prefix ... (XXX the
911 * function should be renamed, but to what?)
913 int BIO_snprintf(char *buf, size_t n, const char *format, ...)
918 va_start(args, format);
920 ret = BIO_vsnprintf(buf, n, format, args);
926 int BIO_vsnprintf(char *buf, size_t n, const char *format, va_list args)
931 if(!_dopr(&buf, NULL, &n, &retlen, &truncated, format, args))
936 * In case of truncation, return -1 like traditional snprintf.
937 * (Current drafts for ISO/IEC 9899 say snprintf should return the
938 * number of characters that would have been written, had the buffer
939 * been large enough.)
943 return (retlen <= INT_MAX) ? (int)retlen : -1;