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);
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 /* some handy macros */
94 #define char_to_int(p) (p - '0')
95 #define OSSL_MAX(p,q) ((p >= q) ? p : q)
101 size_t *retlen, int *truncated, const char *format, va_list args)
114 state = DP_S_DEFAULT;
115 flags = currlen = cflags = min = 0;
119 while (state != DP_S_DONE) {
120 if (ch == '\0' || (buffer == NULL && currlen >= *maxlen))
128 if(!doapr_outch(sbuffer, buffer, &currlen, maxlen, ch))
160 if (isdigit((unsigned char)ch)) {
161 min = 10 * min + char_to_int(ch);
163 } else if (ch == '*') {
164 min = va_arg(args, int);
178 if (isdigit((unsigned char)ch)) {
181 max = 10 * max + char_to_int(ch);
183 } else if (ch == '*') {
184 max = va_arg(args, int);
197 if (*format == 'l') {
209 cflags = DP_C_LDOUBLE;
223 value = (short int)va_arg(args, int);
226 value = va_arg(args, long int);
229 value = va_arg(args, LLONG);
232 value = va_arg(args, int);
235 if (!fmtint(sbuffer, buffer, &currlen, maxlen, value, 10, min,
245 flags |= DP_F_UNSIGNED;
248 value = (unsigned short int)va_arg(args, unsigned int);
251 value = (LLONG) va_arg(args, unsigned long int);
254 value = va_arg(args, unsigned LLONG);
257 value = (LLONG) va_arg(args, unsigned int);
260 if (!fmtint(sbuffer, buffer, &currlen, maxlen, value,
261 ch == 'o' ? 8 : (ch == 'u' ? 10 : 16),
266 if (cflags == DP_C_LDOUBLE)
267 fvalue = va_arg(args, LDOUBLE);
269 fvalue = va_arg(args, double);
270 if (!fmtfp(sbuffer, buffer, &currlen, maxlen, fvalue, min, max,
277 if (cflags == DP_C_LDOUBLE)
278 fvalue = va_arg(args, LDOUBLE);
280 fvalue = va_arg(args, double);
281 if (!fmtfp(sbuffer, buffer, &currlen, maxlen, fvalue, min, max,
288 if (cflags == DP_C_LDOUBLE)
289 fvalue = va_arg(args, LDOUBLE);
291 fvalue = va_arg(args, double);
292 if (!fmtfp(sbuffer, buffer, &currlen, maxlen, fvalue, min, max,
297 if(!doapr_outch(sbuffer, buffer, &currlen, maxlen,
302 strvalue = va_arg(args, char *);
309 if (!fmtstr(sbuffer, buffer, &currlen, maxlen, strvalue,
314 value = (size_t)va_arg(args, void *);
315 if (!fmtint(sbuffer, buffer, &currlen, maxlen,
316 value, 16, min, max, flags | DP_F_NUM))
320 if (cflags == DP_C_SHORT) {
322 num = va_arg(args, short int *);
324 } else if (cflags == DP_C_LONG) { /* XXX */
326 num = va_arg(args, long int *);
327 *num = (long int)currlen;
328 } else if (cflags == DP_C_LLONG) { /* XXX */
330 num = va_arg(args, LLONG *);
331 *num = (LLONG) currlen;
334 num = va_arg(args, int *);
339 if(!doapr_outch(sbuffer, buffer, &currlen, maxlen, ch))
343 /* not supported yet, treat as next char */
351 state = DP_S_DEFAULT;
352 flags = cflags = min = 0;
361 *truncated = (currlen > *maxlen - 1);
363 currlen = *maxlen - 1;
364 if(!doapr_outch(sbuffer, buffer, &currlen, maxlen, '\0'))
366 *retlen = currlen - 1;
371 fmtstr(char **sbuffer,
374 size_t *maxlen, const char *value, int flags, int min, int max)
383 strln = strlen(value);
387 padlen = min - strln;
388 if (min < 0 || padlen < 0)
390 if (flags & DP_F_MINUS)
393 while ((padlen > 0) && (cnt < max)) {
394 if(!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
399 while (*value && (cnt < max)) {
400 if(!doapr_outch(sbuffer, buffer, currlen, maxlen, *value++))
404 while ((padlen < 0) && (cnt < max)) {
405 if(!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
414 fmtint(char **sbuffer,
417 size_t *maxlen, LLONG value, int base, int min, int max, int flags)
420 const char *prefix = "";
421 unsigned LLONG uvalue;
422 char convert[DECIMAL_SIZE(value) + 3];
431 if (!(flags & DP_F_UNSIGNED)) {
435 } else if (flags & DP_F_PLUS)
437 else if (flags & DP_F_SPACE)
440 if (flags & DP_F_NUM) {
449 convert[place++] = (caps ? "0123456789ABCDEF" : "0123456789abcdef")
450 [uvalue % (unsigned)base];
451 uvalue = (uvalue / (unsigned)base);
452 } while (uvalue && (place < (int)sizeof(convert)));
453 if (place == sizeof(convert))
457 zpadlen = max - place;
459 min - OSSL_MAX(max, place) - (signvalue ? 1 : 0) - strlen(prefix);
464 if (flags & DP_F_ZERO) {
465 zpadlen = OSSL_MAX(zpadlen, spadlen);
468 if (flags & DP_F_MINUS)
472 while (spadlen > 0) {
473 if(!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
480 if(!doapr_outch(sbuffer, buffer, currlen, maxlen, signvalue))
485 if(!doapr_outch(sbuffer, buffer, currlen, maxlen, *prefix))
492 while (zpadlen > 0) {
493 if(!doapr_outch(sbuffer, buffer, currlen, maxlen, '0'))
500 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, convert[--place]))
504 /* left justified spaces */
505 while (spadlen < 0) {
506 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
513 static LDOUBLE abs_val(LDOUBLE value)
515 LDOUBLE result = value;
521 static LDOUBLE pow_10(int in_exp)
531 static long roundv(LDOUBLE value)
534 intpart = (long)value;
535 value = value - intpart;
542 fmtfp(char **sbuffer,
545 size_t *maxlen, LDOUBLE fvalue, int min, int max, int flags)
561 ufvalue = abs_val(fvalue);
564 else if (flags & DP_F_PLUS)
566 else if (flags & DP_F_SPACE)
569 intpart = (long)ufvalue;
572 * sorry, we only support 9 digits past the decimal because of our
579 * we "cheat" by converting the fractional part to integer by multiplying
582 max10 = roundv(pow_10(max));
583 fracpart = roundv(pow_10(max) * (ufvalue - intpart));
585 if (fracpart >= max10) {
590 /* convert integer part */
592 iconvert[iplace++] = "0123456789"[intpart % 10];
593 intpart = (intpart / 10);
594 } while (intpart && (iplace < (int)sizeof(iconvert)));
595 if (iplace == sizeof iconvert)
597 iconvert[iplace] = 0;
599 /* convert fractional part */
601 fconvert[fplace++] = "0123456789"[fracpart % 10];
602 fracpart = (fracpart / 10);
603 } while (fplace < max);
604 if (fplace == sizeof fconvert)
606 fconvert[fplace] = 0;
608 /* -1 for decimal point, another -1 if we are printing a sign */
609 padlen = min - iplace - max - 1 - ((signvalue) ? 1 : 0);
610 zpadlen = max - fplace;
615 if (flags & DP_F_MINUS)
618 if ((flags & DP_F_ZERO) && (padlen > 0)) {
620 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, signvalue))
626 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '0'))
632 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
636 if (signvalue && !doapr_outch(sbuffer, buffer, currlen, maxlen, signvalue))
640 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, iconvert[--iplace]))
645 * Decimal point. This should probably use locale to find the correct
648 if (max > 0 || (flags & DP_F_NUM)) {
649 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '.'))
653 if(!doapr_outch(sbuffer, buffer, currlen, maxlen,
658 while (zpadlen > 0) {
659 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '0'))
665 if (!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
672 #define BUFFER_INC 1024
675 doapr_outch(char **sbuffer,
676 char **buffer, size_t *currlen, size_t *maxlen, int c)
678 /* If we haven't at least one buffer, someone has doe a big booboo */
679 OPENSSL_assert(*sbuffer != NULL || buffer != NULL);
681 /* |currlen| must always be <= |*maxlen| */
682 OPENSSL_assert(*currlen <= *maxlen);
684 if (buffer && *currlen == *maxlen) {
685 if (*maxlen > INT_MAX - BUFFER_INC)
688 *maxlen += BUFFER_INC;
689 if (*buffer == NULL) {
690 *buffer = OPENSSL_malloc(*maxlen);
694 OPENSSL_assert(*sbuffer != NULL);
695 memcpy(*buffer, *sbuffer, *currlen);
700 tmpbuf = OPENSSL_realloc(*buffer, *maxlen);
707 if (*currlen < *maxlen) {
709 (*sbuffer)[(*currlen)++] = (char)c;
711 (*buffer)[(*currlen)++] = (char)c;
717 /***************************************************************************/
719 int BIO_printf(BIO *bio, const char *format, ...)
724 va_start(args, format);
726 ret = BIO_vprintf(bio, format, args);
732 int BIO_vprintf(BIO *bio, const char *format, va_list args)
736 char hugebuf[1024 * 2]; /* Was previously 10k, which is unreasonable
737 * in small-stack environments, like threads
738 * or DOS programs. */
739 char *hugebufp = hugebuf;
740 size_t hugebufsize = sizeof(hugebuf);
745 if (!_dopr(&hugebufp, &dynbuf, &hugebufsize, &retlen, &ignored, format,
747 OPENSSL_free(dynbuf);
751 ret = BIO_write(bio, dynbuf, (int)retlen);
752 OPENSSL_free(dynbuf);
754 ret = BIO_write(bio, hugebuf, (int)retlen);
760 * As snprintf is not available everywhere, we provide our own
761 * implementation. This function has nothing to do with BIOs, but it's
762 * closely related to BIO_printf, and we need *some* name prefix ... (XXX the
763 * function should be renamed, but to what?)
765 int BIO_snprintf(char *buf, size_t n, const char *format, ...)
770 va_start(args, format);
772 ret = BIO_vsnprintf(buf, n, format, args);
778 int BIO_vsnprintf(char *buf, size_t n, const char *format, va_list args)
783 if(!_dopr(&buf, NULL, &n, &retlen, &truncated, format, args))
788 * In case of truncation, return -1 like traditional snprintf.
789 * (Current drafts for ISO/IEC 9899 say snprintf should return the
790 * number of characters that would have been written, had the buffer
791 * been large enough.)
795 return (retlen <= INT_MAX) ? (int)retlen : -1;