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
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 = strlen(value);
392 padlen = min - strln;
393 if (min < 0 || padlen < 0)
395 if (flags & DP_F_MINUS)
398 while ((padlen > 0) && (cnt < max)) {
399 if(!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
404 while (*value && (cnt < max)) {
405 if(!doapr_outch(sbuffer, buffer, currlen, maxlen, *value++))
409 while ((padlen < 0) && (cnt < max)) {
410 if(!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
419 fmtint(char **sbuffer,
422 size_t *maxlen, LLONG value, int base, int min, int max, int flags)
425 const char *prefix = "";
426 unsigned LLONG uvalue;
427 char convert[DECIMAL_SIZE(value) + 3];
436 if (!(flags & DP_F_UNSIGNED)) {
440 } else if (flags & DP_F_PLUS)
442 else if (flags & DP_F_SPACE)
445 if (flags & DP_F_NUM) {
454 convert[place++] = (caps ? "0123456789ABCDEF" : "0123456789abcdef")
455 [uvalue % (unsigned)base];
456 uvalue = (uvalue / (unsigned)base);
457 } while (uvalue && (place < (int)sizeof(convert)));
458 if (place == sizeof(convert))
462 zpadlen = max - place;
464 min - OSSL_MAX(max, place) - (signvalue ? 1 : 0) - strlen(prefix);
469 if (flags & DP_F_ZERO) {
470 zpadlen = OSSL_MAX(zpadlen, spadlen);
473 if (flags & DP_F_MINUS)
477 while (spadlen > 0) {
478 if(!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
485 if(!doapr_outch(sbuffer, buffer, currlen, maxlen, signvalue))
490 if(!doapr_outch(sbuffer, buffer, currlen, maxlen, *prefix))
497 while (zpadlen > 0) {
498 if(!doapr_outch(sbuffer, buffer, currlen, maxlen, '0'))
505 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, convert[--place]))
509 /* left justified spaces */
510 while (spadlen < 0) {
511 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
518 static LDOUBLE abs_val(LDOUBLE value)
520 LDOUBLE result = value;
526 static LDOUBLE pow_10(int in_exp)
536 static long roundv(LDOUBLE value)
539 intpart = (long)value;
540 value = value - intpart;
547 fmtfp(char **sbuffer,
550 size_t *maxlen, LDOUBLE fvalue, int min, int max, int flags, int style)
574 else if (flags & DP_F_PLUS)
576 else if (flags & DP_F_SPACE)
580 * G_FORMAT sometimes prints like E_FORMAT and sometimes like F_FORMAT
581 * depending on the number to be printed. Work out which one it is and use
584 if (style == G_FORMAT) {
586 realstyle = F_FORMAT;
587 } else if (fvalue < 0.0001) {
588 realstyle = E_FORMAT;
589 } else if ((max == 0 && fvalue >= 10)
590 || (max > 0 && fvalue >= pow_10(max))) {
591 realstyle = E_FORMAT;
593 realstyle = F_FORMAT;
599 if (style != F_FORMAT) {
601 /* Calculate the exponent */
603 while (tmpvalue < 1) {
607 while (tmpvalue > 10) {
612 if (style == G_FORMAT) {
614 * In G_FORMAT the "precision" represents significant digits. We
615 * always have at least 1 significant digit.
619 /* Now convert significant digits to decimal places */
620 if (realstyle == F_FORMAT) {
624 * Should not happen. If we're in F_FORMAT then exp < max?
630 * In E_FORMAT there is always one significant digit in front
631 * of the decimal point, so:
632 * significant digits == 1 + decimal places
637 if (realstyle == E_FORMAT)
640 ufvalue = abs_val(fvalue);
641 intpart = (long)ufvalue;
644 * sorry, we only support 9 digits past the decimal because of our
651 * we "cheat" by converting the fractional part to integer by multiplying
654 max10 = roundv(pow_10(max));
655 fracpart = roundv(pow_10(max) * (ufvalue - intpart));
657 if (fracpart >= max10) {
662 /* convert integer part */
664 iconvert[iplace++] = "0123456789"[intpart % 10];
665 intpart = (intpart / 10);
666 } while (intpart && (iplace < (int)sizeof(iconvert)));
667 if (iplace == sizeof iconvert)
669 iconvert[iplace] = 0;
671 /* convert fractional part */
672 while (fplace < max) {
673 if (style == G_FORMAT && fplace == 0 && (fracpart % 10) == 0) {
674 /* We strip trailing zeros in G_FORMAT */
676 fracpart = fracpart / 10;
681 fconvert[fplace++] = "0123456789"[fracpart % 10];
682 fracpart = (fracpart / 10);
685 if (fplace == sizeof fconvert)
687 fconvert[fplace] = 0;
689 /* convert exponent part */
690 if (realstyle == E_FORMAT) {
698 econvert[eplace++] = "0123456789"[tmpexp % 10];
699 tmpexp = (tmpexp / 10);
700 } while (tmpexp > 0 && eplace < (int)sizeof(econvert));
701 /* Exponent is huge!! Too big to print */
704 /* Add a leading 0 for single digit exponents */
706 econvert[eplace++] = '0';
710 * -1 for decimal point (if we have one, i.e. max > 0),
711 * another -1 if we are printing a sign
713 padlen = min - iplace - max - (max > 0 ? 1 : 0) - ((signvalue) ? 1 : 0);
714 /* Take some off for exponent prefix "+e" and exponent */
715 if (realstyle == E_FORMAT)
716 padlen -= 2 + eplace;
717 zpadlen = max - fplace;
722 if (flags & DP_F_MINUS)
725 if ((flags & DP_F_ZERO) && (padlen > 0)) {
727 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, signvalue))
733 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '0'))
739 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
743 if (signvalue && !doapr_outch(sbuffer, buffer, currlen, maxlen, signvalue))
747 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, iconvert[--iplace]))
752 * Decimal point. This should probably use locale to find the correct
755 if (max > 0 || (flags & DP_F_NUM)) {
756 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '.'))
760 if(!doapr_outch(sbuffer, buffer, currlen, maxlen,
765 while (zpadlen > 0) {
766 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '0'))
770 if (realstyle == E_FORMAT) {
773 if ((flags & DP_F_UP) == 0)
777 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, ech))
780 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '-'))
783 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '+'))
787 if (!doapr_outch(sbuffer, buffer, currlen, maxlen,
794 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
801 #define BUFFER_INC 1024
804 doapr_outch(char **sbuffer,
805 char **buffer, size_t *currlen, size_t *maxlen, int c)
807 /* If we haven't at least one buffer, someone has doe a big booboo */
808 OPENSSL_assert(*sbuffer != NULL || buffer != NULL);
810 /* |currlen| must always be <= |*maxlen| */
811 OPENSSL_assert(*currlen <= *maxlen);
813 if (buffer && *currlen == *maxlen) {
814 if (*maxlen > INT_MAX - BUFFER_INC)
817 *maxlen += BUFFER_INC;
818 if (*buffer == NULL) {
819 *buffer = OPENSSL_malloc(*maxlen);
823 OPENSSL_assert(*sbuffer != NULL);
824 memcpy(*buffer, *sbuffer, *currlen);
829 tmpbuf = OPENSSL_realloc(*buffer, *maxlen);
836 if (*currlen < *maxlen) {
838 (*sbuffer)[(*currlen)++] = (char)c;
840 (*buffer)[(*currlen)++] = (char)c;
846 /***************************************************************************/
848 int BIO_printf(BIO *bio, const char *format, ...)
853 va_start(args, format);
855 ret = BIO_vprintf(bio, format, args);
861 int BIO_vprintf(BIO *bio, const char *format, va_list args)
865 char hugebuf[1024 * 2]; /* Was previously 10k, which is unreasonable
866 * in small-stack environments, like threads
867 * or DOS programs. */
868 char *hugebufp = hugebuf;
869 size_t hugebufsize = sizeof(hugebuf);
874 if (!_dopr(&hugebufp, &dynbuf, &hugebufsize, &retlen, &ignored, format,
876 OPENSSL_free(dynbuf);
880 ret = BIO_write(bio, dynbuf, (int)retlen);
881 OPENSSL_free(dynbuf);
883 ret = BIO_write(bio, hugebuf, (int)retlen);
889 * As snprintf is not available everywhere, we provide our own
890 * implementation. This function has nothing to do with BIOs, but it's
891 * closely related to BIO_printf, and we need *some* name prefix ... (XXX the
892 * function should be renamed, but to what?)
894 int BIO_snprintf(char *buf, size_t n, const char *format, ...)
899 va_start(args, format);
901 ret = BIO_vsnprintf(buf, n, format, args);
907 int BIO_vsnprintf(char *buf, size_t n, const char *format, va_list args)
912 if(!_dopr(&buf, NULL, &n, &retlen, &truncated, format, args))
917 * In case of truncation, return -1 like traditional snprintf.
918 * (Current drafts for ISO/IEC 9899 say snprintf should return the
919 * number of characters that would have been written, had the buffer
920 * been large enough.)
924 return (retlen <= INT_MAX) ? (int)retlen : -1;