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;
366 *truncated = (currlen > *maxlen - 1);
368 currlen = *maxlen - 1;
369 if(!doapr_outch(sbuffer, buffer, &currlen, maxlen, '\0'))
371 *retlen = currlen - 1;
376 fmtstr(char **sbuffer,
379 size_t *maxlen, const char *value, int flags, int min, int max)
388 strln = OPENSSL_strnlen(value, max < 0 ? SIZE_MAX : (size_t)max);
390 padlen = min - strln;
391 if (min < 0 || padlen < 0)
394 max += padlen; /* The maximum output including padding */
395 if (flags & DP_F_MINUS)
398 while ((padlen > 0) && (max < 0 || cnt < max)) {
399 if(!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
404 while (strln > 0 && (max < 0 || cnt < max)) {
405 if(!doapr_outch(sbuffer, buffer, currlen, maxlen, *value++))
410 while ((padlen < 0) && (max < 0 || cnt < max)) {
411 if(!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
420 fmtint(char **sbuffer,
423 size_t *maxlen, LLONG value, int base, int min, int max, int flags)
426 const char *prefix = "";
427 unsigned LLONG uvalue;
428 char convert[DECIMAL_SIZE(value) + 3];
437 if (!(flags & DP_F_UNSIGNED)) {
441 } else if (flags & DP_F_PLUS)
443 else if (flags & DP_F_SPACE)
446 if (flags & DP_F_NUM) {
455 convert[place++] = (caps ? "0123456789ABCDEF" : "0123456789abcdef")
456 [uvalue % (unsigned)base];
457 uvalue = (uvalue / (unsigned)base);
458 } while (uvalue && (place < (int)sizeof(convert)));
459 if (place == sizeof(convert))
463 zpadlen = max - place;
465 min - OSSL_MAX(max, place) - (signvalue ? 1 : 0) - strlen(prefix);
470 if (flags & DP_F_ZERO) {
471 zpadlen = OSSL_MAX(zpadlen, spadlen);
474 if (flags & DP_F_MINUS)
478 while (spadlen > 0) {
479 if(!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
486 if(!doapr_outch(sbuffer, buffer, currlen, maxlen, signvalue))
491 if(!doapr_outch(sbuffer, buffer, currlen, maxlen, *prefix))
498 while (zpadlen > 0) {
499 if(!doapr_outch(sbuffer, buffer, currlen, maxlen, '0'))
506 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, convert[--place]))
510 /* left justified spaces */
511 while (spadlen < 0) {
512 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
519 static LDOUBLE abs_val(LDOUBLE value)
521 LDOUBLE result = value;
527 static LDOUBLE pow_10(int in_exp)
537 static long roundv(LDOUBLE value)
540 intpart = (long)value;
541 value = value - intpart;
548 fmtfp(char **sbuffer,
551 size_t *maxlen, LDOUBLE fvalue, int min, int max, int flags, int style)
565 unsigned long intpart;
566 unsigned long fracpart;
575 else if (flags & DP_F_PLUS)
577 else if (flags & DP_F_SPACE)
581 * G_FORMAT sometimes prints like E_FORMAT and sometimes like F_FORMAT
582 * depending on the number to be printed. Work out which one it is and use
585 if (style == G_FORMAT) {
587 realstyle = F_FORMAT;
588 } else if (fvalue < 0.0001) {
589 realstyle = E_FORMAT;
590 } else if ((max == 0 && fvalue >= 10)
591 || (max > 0 && fvalue >= pow_10(max))) {
592 realstyle = E_FORMAT;
594 realstyle = F_FORMAT;
600 if (style != F_FORMAT) {
602 /* Calculate the exponent */
604 while (tmpvalue < 1) {
608 while (tmpvalue > 10) {
613 if (style == G_FORMAT) {
615 * In G_FORMAT the "precision" represents significant digits. We
616 * always have at least 1 significant digit.
620 /* Now convert significant digits to decimal places */
621 if (realstyle == F_FORMAT) {
625 * Should not happen. If we're in F_FORMAT then exp < max?
631 * In E_FORMAT there is always one significant digit in front
632 * of the decimal point, so:
633 * significant digits == 1 + decimal places
638 if (realstyle == E_FORMAT)
641 ufvalue = abs_val(fvalue);
642 if (ufvalue > ULONG_MAX) {
646 intpart = (unsigned long)ufvalue;
649 * sorry, we only support 9 digits past the decimal because of our
656 * we "cheat" by converting the fractional part to integer by multiplying
659 max10 = roundv(pow_10(max));
660 fracpart = roundv(pow_10(max) * (ufvalue - intpart));
662 if (fracpart >= max10) {
667 /* convert integer part */
669 iconvert[iplace++] = "0123456789"[intpart % 10];
670 intpart = (intpart / 10);
671 } while (intpart && (iplace < (int)sizeof(iconvert)));
672 if (iplace == sizeof iconvert)
674 iconvert[iplace] = 0;
676 /* convert fractional part */
677 while (fplace < max) {
678 if (style == G_FORMAT && fplace == 0 && (fracpart % 10) == 0) {
679 /* We strip trailing zeros in G_FORMAT */
681 fracpart = fracpart / 10;
686 fconvert[fplace++] = "0123456789"[fracpart % 10];
687 fracpart = (fracpart / 10);
690 if (fplace == sizeof fconvert)
692 fconvert[fplace] = 0;
694 /* convert exponent part */
695 if (realstyle == E_FORMAT) {
703 econvert[eplace++] = "0123456789"[tmpexp % 10];
704 tmpexp = (tmpexp / 10);
705 } while (tmpexp > 0 && eplace < (int)sizeof(econvert));
706 /* Exponent is huge!! Too big to print */
709 /* Add a leading 0 for single digit exponents */
711 econvert[eplace++] = '0';
715 * -1 for decimal point (if we have one, i.e. max > 0),
716 * another -1 if we are printing a sign
718 padlen = min - iplace - max - (max > 0 ? 1 : 0) - ((signvalue) ? 1 : 0);
719 /* Take some off for exponent prefix "+e" and exponent */
720 if (realstyle == E_FORMAT)
721 padlen -= 2 + eplace;
722 zpadlen = max - fplace;
727 if (flags & DP_F_MINUS)
730 if ((flags & DP_F_ZERO) && (padlen > 0)) {
732 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, signvalue))
738 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '0'))
744 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
748 if (signvalue && !doapr_outch(sbuffer, buffer, currlen, maxlen, signvalue))
752 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, iconvert[--iplace]))
757 * Decimal point. This should probably use locale to find the correct
760 if (max > 0 || (flags & DP_F_NUM)) {
761 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '.'))
765 if(!doapr_outch(sbuffer, buffer, currlen, maxlen,
770 while (zpadlen > 0) {
771 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '0'))
775 if (realstyle == E_FORMAT) {
778 if ((flags & DP_F_UP) == 0)
782 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, ech))
785 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '-'))
788 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '+'))
792 if (!doapr_outch(sbuffer, buffer, currlen, maxlen,
799 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
806 #define BUFFER_INC 1024
809 doapr_outch(char **sbuffer,
810 char **buffer, size_t *currlen, size_t *maxlen, int c)
812 /* If we haven't at least one buffer, someone has doe a big booboo */
813 OPENSSL_assert(*sbuffer != NULL || buffer != NULL);
815 /* |currlen| must always be <= |*maxlen| */
816 OPENSSL_assert(*currlen <= *maxlen);
818 if (buffer && *currlen == *maxlen) {
819 if (*maxlen > INT_MAX - BUFFER_INC)
822 *maxlen += BUFFER_INC;
823 if (*buffer == NULL) {
824 *buffer = OPENSSL_malloc(*maxlen);
828 OPENSSL_assert(*sbuffer != NULL);
829 memcpy(*buffer, *sbuffer, *currlen);
834 tmpbuf = OPENSSL_realloc(*buffer, *maxlen);
841 if (*currlen < *maxlen) {
843 (*sbuffer)[(*currlen)++] = (char)c;
845 (*buffer)[(*currlen)++] = (char)c;
851 /***************************************************************************/
853 int BIO_printf(BIO *bio, const char *format, ...)
858 va_start(args, format);
860 ret = BIO_vprintf(bio, format, args);
866 int BIO_vprintf(BIO *bio, const char *format, va_list args)
870 char hugebuf[1024 * 2]; /* Was previously 10k, which is unreasonable
871 * in small-stack environments, like threads
872 * or DOS programs. */
873 char *hugebufp = hugebuf;
874 size_t hugebufsize = sizeof(hugebuf);
879 if (!_dopr(&hugebufp, &dynbuf, &hugebufsize, &retlen, &ignored, format,
881 OPENSSL_free(dynbuf);
885 ret = BIO_write(bio, dynbuf, (int)retlen);
886 OPENSSL_free(dynbuf);
888 ret = BIO_write(bio, hugebuf, (int)retlen);
894 * As snprintf is not available everywhere, we provide our own
895 * implementation. This function has nothing to do with BIOs, but it's
896 * closely related to BIO_printf, and we need *some* name prefix ... (XXX the
897 * function should be renamed, but to what?)
899 int BIO_snprintf(char *buf, size_t n, const char *format, ...)
904 va_start(args, format);
906 ret = BIO_vsnprintf(buf, n, format, args);
912 int BIO_vsnprintf(char *buf, size_t n, const char *format, va_list args)
917 if(!_dopr(&buf, NULL, &n, &retlen, &truncated, format, args))
922 * In case of truncation, return -1 like traditional snprintf.
923 * (Current drafts for ISO/IEC 9899 say snprintf should return the
924 * number of characters that would have been written, had the buffer
925 * been large enough.)
929 return (retlen <= INT_MAX) ? (int)retlen : -1;