955 lines
26 KiB
C
955 lines
26 KiB
C
/*
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* Copyright 1995-2023 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <stdio.h>
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#include <string.h>
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#include "internal/cryptlib.h"
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#include "crypto/ctype.h"
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#include "internal/numbers.h"
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#include <openssl/bio.h>
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#include <openssl/configuration.h>
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/*
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* Copyright Patrick Powell 1995
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* This code is based on code written by Patrick Powell <papowell@astart.com>
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* It may be used for any purpose as long as this notice remains intact
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* on all source code distributions.
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*/
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#ifdef HAVE_LONG_DOUBLE
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# define LDOUBLE long double
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#else
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# define LDOUBLE double
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#endif
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static int fmtstr(char **, char **, size_t *, size_t *,
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const char *, int, int, int);
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static int fmtint(char **, char **, size_t *, size_t *,
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int64_t, int, int, int, int);
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#ifndef OPENSSL_SYS_UEFI
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static int fmtfp(char **, char **, size_t *, size_t *,
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LDOUBLE, int, int, int, int);
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#endif
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static int doapr_outch(char **, char **, size_t *, size_t *, int);
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static int _dopr(char **sbuffer, char **buffer,
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size_t *maxlen, size_t *retlen, int *truncated,
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const char *format, va_list args);
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/* format read states */
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#define DP_S_DEFAULT 0
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#define DP_S_FLAGS 1
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#define DP_S_MIN 2
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#define DP_S_DOT 3
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#define DP_S_MAX 4
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#define DP_S_MOD 5
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#define DP_S_CONV 6
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#define DP_S_DONE 7
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/* format flags - Bits */
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/* left-aligned padding */
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#define DP_F_MINUS (1 << 0)
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/* print an explicit '+' for a value with positive sign */
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#define DP_F_PLUS (1 << 1)
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/* print an explicit ' ' for a value with positive sign */
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#define DP_F_SPACE (1 << 2)
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/* print 0/0x prefix for octal/hex and decimal point for floating point */
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#define DP_F_NUM (1 << 3)
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/* print leading zeroes */
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#define DP_F_ZERO (1 << 4)
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/* print HEX in UPPERcase */
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#define DP_F_UP (1 << 5)
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/* treat value as unsigned */
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#define DP_F_UNSIGNED (1 << 6)
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/* conversion flags */
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#define DP_C_SHORT 1
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#define DP_C_LONG 2
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#define DP_C_LDOUBLE 3
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#define DP_C_LLONG 4
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#define DP_C_SIZE 5
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/* Floating point formats */
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#define F_FORMAT 0
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#define E_FORMAT 1
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#define G_FORMAT 2
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/* some handy macros */
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#define char_to_int(p) (p - '0')
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#define OSSL_MAX(p,q) ((p >= q) ? p : q)
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static int
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_dopr(char **sbuffer,
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char **buffer,
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size_t *maxlen,
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size_t *retlen, int *truncated, const char *format, va_list args)
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{
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char ch;
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int64_t value;
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#ifndef OPENSSL_SYS_UEFI
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LDOUBLE fvalue;
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#endif
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char *strvalue;
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int min;
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int max;
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int state;
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int flags;
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int cflags;
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size_t currlen;
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state = DP_S_DEFAULT;
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flags = currlen = cflags = min = 0;
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max = -1;
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ch = *format++;
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while (state != DP_S_DONE) {
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if (ch == '\0' || (buffer == NULL && currlen >= *maxlen))
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state = DP_S_DONE;
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switch (state) {
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case DP_S_DEFAULT:
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if (ch == '%')
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state = DP_S_FLAGS;
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else
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if (!doapr_outch(sbuffer, buffer, &currlen, maxlen, ch))
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return 0;
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ch = *format++;
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break;
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case DP_S_FLAGS:
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switch (ch) {
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case '-':
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flags |= DP_F_MINUS;
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ch = *format++;
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break;
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case '+':
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flags |= DP_F_PLUS;
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ch = *format++;
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break;
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case ' ':
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flags |= DP_F_SPACE;
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ch = *format++;
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break;
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case '#':
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flags |= DP_F_NUM;
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ch = *format++;
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break;
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case '0':
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flags |= DP_F_ZERO;
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ch = *format++;
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break;
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default:
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state = DP_S_MIN;
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break;
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}
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break;
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case DP_S_MIN:
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if (ossl_isdigit(ch)) {
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min = 10 * min + char_to_int(ch);
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ch = *format++;
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} else if (ch == '*') {
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min = va_arg(args, int);
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ch = *format++;
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state = DP_S_DOT;
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} else
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state = DP_S_DOT;
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break;
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case DP_S_DOT:
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if (ch == '.') {
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state = DP_S_MAX;
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ch = *format++;
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} else
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state = DP_S_MOD;
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break;
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case DP_S_MAX:
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if (ossl_isdigit(ch)) {
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if (max < 0)
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max = 0;
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max = 10 * max + char_to_int(ch);
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ch = *format++;
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} else if (ch == '*') {
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max = va_arg(args, int);
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ch = *format++;
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state = DP_S_MOD;
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} else
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state = DP_S_MOD;
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break;
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case DP_S_MOD:
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switch (ch) {
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case 'h':
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cflags = DP_C_SHORT;
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ch = *format++;
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break;
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case 'l':
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if (*format == 'l') {
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cflags = DP_C_LLONG;
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format++;
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} else
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cflags = DP_C_LONG;
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ch = *format++;
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break;
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case 'q':
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case 'j':
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cflags = DP_C_LLONG;
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ch = *format++;
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break;
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case 'L':
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cflags = DP_C_LDOUBLE;
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ch = *format++;
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break;
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case 'z':
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cflags = DP_C_SIZE;
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ch = *format++;
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break;
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default:
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break;
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}
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state = DP_S_CONV;
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break;
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case DP_S_CONV:
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switch (ch) {
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case 'd':
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case 'i':
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switch (cflags) {
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case DP_C_SHORT:
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value = (short int)va_arg(args, int);
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break;
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case DP_C_LONG:
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value = va_arg(args, long int);
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break;
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case DP_C_LLONG:
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value = va_arg(args, int64_t);
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break;
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case DP_C_SIZE:
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value = va_arg(args, ossl_ssize_t);
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break;
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default:
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value = va_arg(args, int);
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break;
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}
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if (!fmtint(sbuffer, buffer, &currlen, maxlen, value, 10, min,
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max, flags))
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return 0;
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break;
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case 'X':
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flags |= DP_F_UP;
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/* FALLTHROUGH */
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case 'x':
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case 'o':
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case 'u':
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flags |= DP_F_UNSIGNED;
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switch (cflags) {
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case DP_C_SHORT:
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value = (unsigned short int)va_arg(args, unsigned int);
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break;
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case DP_C_LONG:
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value = va_arg(args, unsigned long int);
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break;
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case DP_C_LLONG:
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value = va_arg(args, uint64_t);
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break;
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case DP_C_SIZE:
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value = va_arg(args, size_t);
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break;
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default:
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value = va_arg(args, unsigned int);
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break;
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}
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if (!fmtint(sbuffer, buffer, &currlen, maxlen, value,
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ch == 'o' ? 8 : (ch == 'u' ? 10 : 16),
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min, max, flags))
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return 0;
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break;
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#ifndef OPENSSL_SYS_UEFI
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case 'f':
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if (cflags == DP_C_LDOUBLE)
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fvalue = va_arg(args, LDOUBLE);
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else
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fvalue = va_arg(args, double);
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if (!fmtfp(sbuffer, buffer, &currlen, maxlen, fvalue, min, max,
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flags, F_FORMAT))
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return 0;
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break;
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case 'E':
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flags |= DP_F_UP;
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/* fall through */
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case 'e':
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if (cflags == DP_C_LDOUBLE)
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fvalue = va_arg(args, LDOUBLE);
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else
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fvalue = va_arg(args, double);
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if (!fmtfp(sbuffer, buffer, &currlen, maxlen, fvalue, min, max,
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flags, E_FORMAT))
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return 0;
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break;
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case 'G':
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flags |= DP_F_UP;
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/* fall through */
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case 'g':
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if (cflags == DP_C_LDOUBLE)
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fvalue = va_arg(args, LDOUBLE);
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else
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fvalue = va_arg(args, double);
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if (!fmtfp(sbuffer, buffer, &currlen, maxlen, fvalue, min, max,
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flags, G_FORMAT))
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return 0;
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break;
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#else
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case 'f':
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case 'E':
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case 'e':
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case 'G':
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case 'g':
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/* not implemented for UEFI */
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ERR_raise(ERR_LIB_BIO, ERR_R_UNSUPPORTED);
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return 0;
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#endif
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case 'c':
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if (!doapr_outch(sbuffer, buffer, &currlen, maxlen,
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va_arg(args, int)))
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return 0;
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break;
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case 's':
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strvalue = va_arg(args, char *);
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if (max < 0) {
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if (buffer)
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max = INT_MAX;
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else
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max = *maxlen;
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}
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if (!fmtstr(sbuffer, buffer, &currlen, maxlen, strvalue,
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flags, min, max))
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return 0;
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break;
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case 'p':
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value = (size_t)va_arg(args, void *);
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if (!fmtint(sbuffer, buffer, &currlen, maxlen,
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value, 16, min, max, flags | DP_F_NUM))
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return 0;
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break;
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case 'n':
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{
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int *num;
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num = va_arg(args, int *);
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*num = currlen;
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}
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break;
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case '%':
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if (!doapr_outch(sbuffer, buffer, &currlen, maxlen, ch))
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return 0;
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break;
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case 'w':
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/* not supported yet, treat as next char */
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format++;
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break;
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default:
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/* unknown, skip */
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break;
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}
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ch = *format++;
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state = DP_S_DEFAULT;
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flags = cflags = min = 0;
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max = -1;
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break;
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case DP_S_DONE:
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break;
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default:
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break;
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}
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}
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/*
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* We have to truncate if there is no dynamic buffer and we have filled the
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* static buffer.
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*/
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if (buffer == NULL) {
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*truncated = (currlen > *maxlen - 1);
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if (*truncated)
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currlen = *maxlen - 1;
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}
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if (!doapr_outch(sbuffer, buffer, &currlen, maxlen, '\0'))
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return 0;
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*retlen = currlen - 1;
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return 1;
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}
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static int
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fmtstr(char **sbuffer,
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char **buffer,
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size_t *currlen,
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size_t *maxlen, const char *value, int flags, int min, int max)
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{
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int padlen;
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size_t strln;
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int cnt = 0;
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if (value == 0)
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value = "<NULL>";
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strln = OPENSSL_strnlen(value, max < 0 ? SIZE_MAX : (size_t)max);
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padlen = min - strln;
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if (min < 0 || padlen < 0)
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padlen = 0;
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if (max >= 0) {
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/*
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* Calculate the maximum output including padding.
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* Make sure max doesn't overflow into negativity
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*/
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if (max < INT_MAX - padlen)
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max += padlen;
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else
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max = INT_MAX;
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}
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if (flags & DP_F_MINUS)
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padlen = -padlen;
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while ((padlen > 0) && (max < 0 || cnt < max)) {
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if (!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
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return 0;
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--padlen;
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++cnt;
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}
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while (strln > 0 && (max < 0 || cnt < max)) {
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if (!doapr_outch(sbuffer, buffer, currlen, maxlen, *value++))
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return 0;
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--strln;
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++cnt;
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}
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while ((padlen < 0) && (max < 0 || cnt < max)) {
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if (!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
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return 0;
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++padlen;
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++cnt;
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}
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return 1;
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}
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static int
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fmtint(char **sbuffer,
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char **buffer,
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size_t *currlen,
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size_t *maxlen, int64_t value, int base, int min, int max, int flags)
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{
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int signvalue = 0;
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const char *prefix = "";
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uint64_t uvalue;
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char convert[DECIMAL_SIZE(value) + 3];
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int place = 0;
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int spadlen = 0;
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int zpadlen = 0;
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int caps = 0;
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if (max < 0)
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max = 0;
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uvalue = value;
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if (!(flags & DP_F_UNSIGNED)) {
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if (value < 0) {
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signvalue = '-';
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uvalue = 0 - (uint64_t)value;
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} else if (flags & DP_F_PLUS)
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signvalue = '+';
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else if (flags & DP_F_SPACE)
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signvalue = ' ';
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}
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if (flags & DP_F_NUM) {
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if (base == 8)
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prefix = "0";
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if (base == 16)
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prefix = "0x";
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}
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if (flags & DP_F_UP)
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caps = 1;
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do {
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convert[place++] = (caps ? "0123456789ABCDEF" : "0123456789abcdef")
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[uvalue % (unsigned)base];
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uvalue = (uvalue / (unsigned)base);
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} while (uvalue && (place < (int)sizeof(convert)));
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if (place == sizeof(convert))
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place--;
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convert[place] = 0;
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zpadlen = max - place;
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spadlen =
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min - OSSL_MAX(max, place) - (signvalue ? 1 : 0) - strlen(prefix);
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if (zpadlen < 0)
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zpadlen = 0;
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if (spadlen < 0)
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spadlen = 0;
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if (flags & DP_F_ZERO) {
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zpadlen = OSSL_MAX(zpadlen, spadlen);
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spadlen = 0;
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}
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if (flags & DP_F_MINUS)
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spadlen = -spadlen;
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/* spaces */
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while (spadlen > 0) {
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if (!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
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return 0;
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--spadlen;
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}
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/* sign */
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if (signvalue)
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if (!doapr_outch(sbuffer, buffer, currlen, maxlen, signvalue))
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return 0;
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/* prefix */
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while (*prefix) {
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if (!doapr_outch(sbuffer, buffer, currlen, maxlen, *prefix))
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return 0;
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prefix++;
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}
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/* zeros */
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if (zpadlen > 0) {
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while (zpadlen > 0) {
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if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '0'))
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return 0;
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--zpadlen;
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}
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}
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/* digits */
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while (place > 0) {
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if (!doapr_outch(sbuffer, buffer, currlen, maxlen, convert[--place]))
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return 0;
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}
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/* left justified spaces */
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while (spadlen < 0) {
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if (!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
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return 0;
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++spadlen;
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}
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return 1;
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}
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#ifndef OPENSSL_SYS_UEFI
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static LDOUBLE abs_val(LDOUBLE value)
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{
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LDOUBLE result = value;
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if (value < 0)
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result = -value;
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return result;
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}
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static LDOUBLE pow_10(int in_exp)
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{
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LDOUBLE result = 1;
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while (in_exp) {
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result *= 10;
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in_exp--;
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}
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return result;
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}
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static long roundv(LDOUBLE value)
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{
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long intpart;
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intpart = (long)value;
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value = value - intpart;
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if (value >= 0.5)
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intpart++;
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return intpart;
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}
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static int
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fmtfp(char **sbuffer,
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char **buffer,
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size_t *currlen,
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size_t *maxlen, LDOUBLE fvalue, int min, int max, int flags, int style)
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{
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int signvalue = 0;
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LDOUBLE ufvalue;
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LDOUBLE tmpvalue;
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char iconvert[20];
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char fconvert[20];
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char econvert[20];
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int iplace = 0;
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int fplace = 0;
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int eplace = 0;
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int padlen = 0;
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int zpadlen = 0;
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long exp = 0;
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unsigned long intpart;
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unsigned long fracpart;
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unsigned long max10;
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int realstyle;
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if (max < 0)
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max = 6;
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if (fvalue < 0)
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signvalue = '-';
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else if (flags & DP_F_PLUS)
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signvalue = '+';
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else if (flags & DP_F_SPACE)
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signvalue = ' ';
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/*
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* G_FORMAT sometimes prints like E_FORMAT and sometimes like F_FORMAT
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* depending on the number to be printed. Work out which one it is and use
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* that from here on.
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*/
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if (style == G_FORMAT) {
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if (fvalue == 0.0) {
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realstyle = F_FORMAT;
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} else if (fvalue < 0.0001) {
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realstyle = E_FORMAT;
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} else if ((max == 0 && fvalue >= 10)
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|| (max > 0 && fvalue >= pow_10(max))) {
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realstyle = E_FORMAT;
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} else {
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realstyle = F_FORMAT;
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}
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} else {
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realstyle = style;
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}
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if (style != F_FORMAT) {
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tmpvalue = fvalue;
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/* Calculate the exponent */
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if (fvalue != 0.0) {
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while (tmpvalue < 1) {
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tmpvalue *= 10;
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exp--;
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}
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while (tmpvalue > 10) {
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tmpvalue /= 10;
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exp++;
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}
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}
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if (style == G_FORMAT) {
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/*
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* In G_FORMAT the "precision" represents significant digits. We
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* always have at least 1 significant digit.
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*/
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if (max == 0)
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max = 1;
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/* Now convert significant digits to decimal places */
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if (realstyle == F_FORMAT) {
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max -= (exp + 1);
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if (max < 0) {
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/*
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* Should not happen. If we're in F_FORMAT then exp < max?
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*/
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(void)doapr_outch(sbuffer, buffer, currlen, maxlen, '\0');
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return 0;
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}
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} else {
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/*
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* In E_FORMAT there is always one significant digit in front
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* of the decimal point, so:
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* significant digits == 1 + decimal places
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*/
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max--;
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}
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}
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if (realstyle == E_FORMAT)
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fvalue = tmpvalue;
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}
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ufvalue = abs_val(fvalue);
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/*
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* By subtracting 65535 (2^16-1) we cancel the low order 15 bits
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* of ULONG_MAX to avoid using imprecise floating point values.
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*/
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if (ufvalue >= (double)(ULONG_MAX - 65535) + 65536.0) {
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/* Number too big */
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(void)doapr_outch(sbuffer, buffer, currlen, maxlen, '\0');
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return 0;
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}
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intpart = (unsigned long)ufvalue;
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/*
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* sorry, we only support 9 digits past the decimal because of our
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* conversion method
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*/
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if (max > 9)
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max = 9;
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/*
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* we "cheat" by converting the fractional part to integer by multiplying
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* by a factor of 10
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*/
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max10 = roundv(pow_10(max));
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fracpart = roundv(pow_10(max) * (ufvalue - intpart));
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if (fracpart >= max10) {
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intpart++;
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fracpart -= max10;
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}
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/* convert integer part */
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do {
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iconvert[iplace++] = "0123456789"[intpart % 10];
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intpart = (intpart / 10);
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} while (intpart && (iplace < (int)sizeof(iconvert)));
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if (iplace == sizeof(iconvert))
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iplace--;
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iconvert[iplace] = 0;
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/* convert fractional part */
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while (fplace < max) {
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if (style == G_FORMAT && fplace == 0 && (fracpart % 10) == 0) {
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/* We strip trailing zeros in G_FORMAT */
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max--;
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fracpart = fracpart / 10;
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if (fplace < max)
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continue;
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break;
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}
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fconvert[fplace++] = "0123456789"[fracpart % 10];
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fracpart = (fracpart / 10);
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}
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fconvert[fplace] = 0;
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/* convert exponent part */
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if (realstyle == E_FORMAT) {
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int tmpexp;
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if (exp < 0)
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tmpexp = -exp;
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else
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tmpexp = exp;
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do {
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econvert[eplace++] = "0123456789"[tmpexp % 10];
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tmpexp = (tmpexp / 10);
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} while (tmpexp > 0 && eplace < (int)sizeof(econvert));
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/* Exponent is huge!! Too big to print */
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if (tmpexp > 0) {
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(void)doapr_outch(sbuffer, buffer, currlen, maxlen, '\0');
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return 0;
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}
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/* Add a leading 0 for single digit exponents */
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if (eplace == 1)
|
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econvert[eplace++] = '0';
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}
|
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/*
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* -1 for decimal point (if we have one, i.e. max > 0),
|
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* another -1 if we are printing a sign
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*/
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padlen = min - iplace - max - (max > 0 ? 1 : 0) - ((signvalue) ? 1 : 0);
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/* Take some off for exponent prefix "+e" and exponent */
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if (realstyle == E_FORMAT)
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padlen -= 2 + eplace;
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zpadlen = max - fplace;
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if (zpadlen < 0)
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zpadlen = 0;
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if (padlen < 0)
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padlen = 0;
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if (flags & DP_F_MINUS)
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padlen = -padlen;
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if ((flags & DP_F_ZERO) && (padlen > 0)) {
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if (signvalue) {
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if (!doapr_outch(sbuffer, buffer, currlen, maxlen, signvalue))
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return 0;
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--padlen;
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signvalue = 0;
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}
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while (padlen > 0) {
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if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '0'))
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return 0;
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--padlen;
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}
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}
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while (padlen > 0) {
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if (!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
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return 0;
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--padlen;
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}
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if (signvalue && !doapr_outch(sbuffer, buffer, currlen, maxlen, signvalue))
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return 0;
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while (iplace > 0) {
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if (!doapr_outch(sbuffer, buffer, currlen, maxlen, iconvert[--iplace]))
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return 0;
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}
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|
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/*
|
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* Decimal point. This should probably use locale to find the correct
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* char to print out.
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*/
|
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if (max > 0 || (flags & DP_F_NUM)) {
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if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '.'))
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return 0;
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while (fplace > 0) {
|
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if (!doapr_outch(sbuffer, buffer, currlen, maxlen,
|
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fconvert[--fplace]))
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return 0;
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}
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}
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while (zpadlen > 0) {
|
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if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '0'))
|
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return 0;
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--zpadlen;
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}
|
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if (realstyle == E_FORMAT) {
|
|
char ech;
|
|
|
|
if ((flags & DP_F_UP) == 0)
|
|
ech = 'e';
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|
else
|
|
ech = 'E';
|
|
if (!doapr_outch(sbuffer, buffer, currlen, maxlen, ech))
|
|
return 0;
|
|
if (exp < 0) {
|
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if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '-'))
|
|
return 0;
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} else {
|
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if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '+'))
|
|
return 0;
|
|
}
|
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while (eplace > 0) {
|
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if (!doapr_outch(sbuffer, buffer, currlen, maxlen,
|
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econvert[--eplace]))
|
|
return 0;
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|
}
|
|
}
|
|
|
|
while (padlen < 0) {
|
|
if (!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
|
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return 0;
|
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++padlen;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
#endif /* OPENSSL_SYS_UEFI */
|
|
|
|
#define BUFFER_INC 1024
|
|
|
|
static int
|
|
doapr_outch(char **sbuffer,
|
|
char **buffer, size_t *currlen, size_t *maxlen, int c)
|
|
{
|
|
/* If we haven't at least one buffer, someone has done a big booboo */
|
|
if (!ossl_assert(*sbuffer != NULL || buffer != NULL))
|
|
return 0;
|
|
|
|
/* |currlen| must always be <= |*maxlen| */
|
|
if (!ossl_assert(*currlen <= *maxlen))
|
|
return 0;
|
|
|
|
if (buffer && *currlen == *maxlen) {
|
|
if (*maxlen > INT_MAX - BUFFER_INC)
|
|
return 0;
|
|
|
|
*maxlen += BUFFER_INC;
|
|
if (*buffer == NULL) {
|
|
if ((*buffer = OPENSSL_malloc(*maxlen)) == NULL)
|
|
return 0;
|
|
if (*currlen > 0) {
|
|
if (!ossl_assert(*sbuffer != NULL))
|
|
return 0;
|
|
memcpy(*buffer, *sbuffer, *currlen);
|
|
}
|
|
*sbuffer = NULL;
|
|
} else {
|
|
char *tmpbuf;
|
|
|
|
tmpbuf = OPENSSL_realloc(*buffer, *maxlen);
|
|
if (tmpbuf == NULL)
|
|
return 0;
|
|
*buffer = tmpbuf;
|
|
}
|
|
}
|
|
|
|
if (*currlen < *maxlen) {
|
|
if (*sbuffer)
|
|
(*sbuffer)[(*currlen)++] = (char)c;
|
|
else
|
|
(*buffer)[(*currlen)++] = (char)c;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/***************************************************************************/
|
|
|
|
int BIO_printf(BIO *bio, const char *format, ...)
|
|
{
|
|
va_list args;
|
|
int ret;
|
|
|
|
va_start(args, format);
|
|
|
|
ret = BIO_vprintf(bio, format, args);
|
|
|
|
va_end(args);
|
|
return ret;
|
|
}
|
|
|
|
int BIO_vprintf(BIO *bio, const char *format, va_list args)
|
|
{
|
|
int ret;
|
|
size_t retlen;
|
|
char hugebuf[1024 * 2]; /* Was previously 10k, which is unreasonable
|
|
* in small-stack environments, like threads
|
|
* or DOS programs. */
|
|
char *hugebufp = hugebuf;
|
|
size_t hugebufsize = sizeof(hugebuf);
|
|
char *dynbuf = NULL;
|
|
int ignored;
|
|
|
|
dynbuf = NULL;
|
|
if (!_dopr(&hugebufp, &dynbuf, &hugebufsize, &retlen, &ignored, format,
|
|
args)) {
|
|
OPENSSL_free(dynbuf);
|
|
return -1;
|
|
}
|
|
if (dynbuf) {
|
|
ret = BIO_write(bio, dynbuf, (int)retlen);
|
|
OPENSSL_free(dynbuf);
|
|
} else {
|
|
ret = BIO_write(bio, hugebuf, (int)retlen);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* As snprintf is not available everywhere, we provide our own
|
|
* implementation. This function has nothing to do with BIOs, but it's
|
|
* closely related to BIO_printf, and we need *some* name prefix ... (XXX the
|
|
* function should be renamed, but to what?)
|
|
*/
|
|
int BIO_snprintf(char *buf, size_t n, const char *format, ...)
|
|
{
|
|
va_list args;
|
|
int ret;
|
|
|
|
va_start(args, format);
|
|
|
|
ret = BIO_vsnprintf(buf, n, format, args);
|
|
|
|
va_end(args);
|
|
return ret;
|
|
}
|
|
|
|
int BIO_vsnprintf(char *buf, size_t n, const char *format, va_list args)
|
|
{
|
|
size_t retlen;
|
|
int truncated;
|
|
|
|
if (!_dopr(&buf, NULL, &n, &retlen, &truncated, format, args))
|
|
return -1;
|
|
|
|
if (truncated)
|
|
/*
|
|
* In case of truncation, return -1 like traditional snprintf.
|
|
* (Current drafts for ISO/IEC 9899 say snprintf should return the
|
|
* number of characters that would have been written, had the buffer
|
|
* been large enough.)
|
|
*/
|
|
return -1;
|
|
return (retlen <= INT_MAX) ? (int)retlen : -1;
|
|
}
|