File 0001-Axe-builtin-printf-implementation-use-glib... of Package openssl-1_0_0.12536

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File 0001-Axe-builtin-printf-implementation-use-glibc-instead.patch of Package openssl-1_0_0.12536

From fd708c2242408187cff392e8b0850275ac99376f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Cristian=20Rodr=C3=ADguez?= <crrodriguez@opensuse.org>
Date: Sun, 4 May 2014 23:36:54 -0400
Subject: [PATCH] Axe builtin printf implementation, use glibc instead

Index: openssl-1.0.2o/crypto/bio/b_print.c
===================================================================
--- openssl-1.0.2o.orig/crypto/bio/b_print.c	2018-03-27 15:54:46.000000000 +0200
+++ openssl-1.0.2o/crypto/bio/b_print.c	2018-08-01 15:31:12.555340969 +0200
@@ -56,17 +56,10 @@
  * [including the GNU Public Licence.]
  */
 
-/* disable assert() unless BIO_DEBUG has been defined */
-#ifndef BIO_DEBUG
-# ifndef NDEBUG
-#  define NDEBUG
-# endif
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
 #endif
 
-/*
- * Stolen from tjh's ssl/ssl_trc.c stuff.
- */
-
 #include <stdio.h>
 #include <string.h>
 #include <ctype.h>
@@ -79,714 +72,6 @@
 #include <openssl/bn.h>         /* To get BN_LLONG properly defined */
 #include <openssl/bio.h>
 
-#if defined(BN_LLONG) || defined(SIXTY_FOUR_BIT)
-# ifndef HAVE_LONG_LONG
-#  define HAVE_LONG_LONG 1
-# endif
-#endif
-
-/***************************************************************************/
-
-/*
- * Copyright Patrick Powell 1995
- * This code is based on code written by Patrick Powell <papowell@astart.com>
- * It may be used for any purpose as long as this notice remains intact
- * on all source code distributions.
- */
-
-/*-
- * This code contains numerious changes and enhancements which were
- * made by lots of contributors over the last years to Patrick Powell's
- * original code:
- *
- * o Patrick Powell <papowell@astart.com>      (1995)
- * o Brandon Long <blong@fiction.net>          (1996, for Mutt)
- * o Thomas Roessler <roessler@guug.de>        (1998, for Mutt)
- * o Michael Elkins <me@cs.hmc.edu>            (1998, for Mutt)
- * o Andrew Tridgell <tridge@samba.org>        (1998, for Samba)
- * o Luke Mewburn <lukem@netbsd.org>           (1999, for LukemFTP)
- * o Ralf S. Engelschall <rse@engelschall.com> (1999, for Pth)
- * o ...                                       (for OpenSSL)
- */
-
-#ifdef HAVE_LONG_DOUBLE
-# define LDOUBLE long double
-#else
-# define LDOUBLE double
-#endif
-
-#ifdef HAVE_LONG_LONG
-# if defined(_WIN32) && !defined(__GNUC__)
-#  define LLONG __int64
-# else
-#  define LLONG long long
-# endif
-#else
-# define LLONG long
-#endif
-
-static int fmtstr(char **, char **, size_t *, size_t *,
-                  const char *, int, int, int);
-static int fmtint(char **, char **, size_t *, size_t *,
-                  LLONG, int, int, int, int);
-static int fmtfp(char **, char **, size_t *, size_t *,
-                 LDOUBLE, int, int, int);
-static int doapr_outch(char **, char **, size_t *, size_t *, int);
-static int _dopr(char **sbuffer, char **buffer,
-                 size_t *maxlen, size_t *retlen, int *truncated,
-                 const char *format, va_list args);
-
-/* format read states */
-#define DP_S_DEFAULT    0
-#define DP_S_FLAGS      1
-#define DP_S_MIN        2
-#define DP_S_DOT        3
-#define DP_S_MAX        4
-#define DP_S_MOD        5
-#define DP_S_CONV       6
-#define DP_S_DONE       7
-
-/* format flags - Bits */
-#define DP_F_MINUS      (1 << 0)
-#define DP_F_PLUS       (1 << 1)
-#define DP_F_SPACE      (1 << 2)
-#define DP_F_NUM        (1 << 3)
-#define DP_F_ZERO       (1 << 4)
-#define DP_F_UP         (1 << 5)
-#define DP_F_UNSIGNED   (1 << 6)
-
-/* conversion flags */
-#define DP_C_SHORT      1
-#define DP_C_LONG       2
-#define DP_C_LDOUBLE    3
-#define DP_C_LLONG      4
-
-/* some handy macros */
-#define char_to_int(p) (p - '0')
-#define OSSL_MAX(p,q) ((p >= q) ? p : q)
-
-static int
-_dopr(char **sbuffer,
-      char **buffer,
-      size_t *maxlen,
-      size_t *retlen, int *truncated, const char *format, va_list args)
-{
-    char ch;
-    LLONG value;
-    LDOUBLE fvalue;
-    char *strvalue;
-    int min;
-    int max;
-    int state;
-    int flags;
-    int cflags;
-    size_t currlen;
-
-    state = DP_S_DEFAULT;
-    flags = currlen = cflags = min = 0;
-    max = -1;
-    ch = *format++;
-
-    while (state != DP_S_DONE) {
-        if (ch == '\0' || (buffer == NULL && currlen >= *maxlen))
-            state = DP_S_DONE;
-
-        switch (state) {
-        case DP_S_DEFAULT:
-            if (ch == '%')
-                state = DP_S_FLAGS;
-            else
-                if(!doapr_outch(sbuffer, buffer, &currlen, maxlen, ch))
-                    return 0;
-            ch = *format++;
-            break;
-        case DP_S_FLAGS:
-            switch (ch) {
-            case '-':
-                flags |= DP_F_MINUS;
-                ch = *format++;
-                break;
-            case '+':
-                flags |= DP_F_PLUS;
-                ch = *format++;
-                break;
-            case ' ':
-                flags |= DP_F_SPACE;
-                ch = *format++;
-                break;
-            case '#':
-                flags |= DP_F_NUM;
-                ch = *format++;
-                break;
-            case '0':
-                flags |= DP_F_ZERO;
-                ch = *format++;
-                break;
-            default:
-                state = DP_S_MIN;
-                break;
-            }
-            break;
-        case DP_S_MIN:
-            if (isdigit((unsigned char)ch)) {
-                min = 10 * min + char_to_int(ch);
-                ch = *format++;
-            } else if (ch == '*') {
-                min = va_arg(args, int);
-                ch = *format++;
-                state = DP_S_DOT;
-            } else
-                state = DP_S_DOT;
-            break;
-        case DP_S_DOT:
-            if (ch == '.') {
-                state = DP_S_MAX;
-                ch = *format++;
-            } else
-                state = DP_S_MOD;
-            break;
-        case DP_S_MAX:
-            if (isdigit((unsigned char)ch)) {
-                if (max < 0)
-                    max = 0;
-                max = 10 * max + char_to_int(ch);
-                ch = *format++;
-            } else if (ch == '*') {
-                max = va_arg(args, int);
-                ch = *format++;
-                state = DP_S_MOD;
-            } else
-                state = DP_S_MOD;
-            break;
-        case DP_S_MOD:
-            switch (ch) {
-            case 'h':
-                cflags = DP_C_SHORT;
-                ch = *format++;
-                break;
-            case 'l':
-                if (*format == 'l') {
-                    cflags = DP_C_LLONG;
-                    format++;
-                } else
-                    cflags = DP_C_LONG;
-                ch = *format++;
-                break;
-            case 'q':
-                cflags = DP_C_LLONG;
-                ch = *format++;
-                break;
-            case 'L':
-                cflags = DP_C_LDOUBLE;
-                ch = *format++;
-                break;
-            default:
-                break;
-            }
-            state = DP_S_CONV;
-            break;
-        case DP_S_CONV:
-            switch (ch) {
-            case 'd':
-            case 'i':
-                switch (cflags) {
-                case DP_C_SHORT:
-                    value = (short int)va_arg(args, int);
-                    break;
-                case DP_C_LONG:
-                    value = va_arg(args, long int);
-                    break;
-                case DP_C_LLONG:
-                    value = va_arg(args, LLONG);
-                    break;
-                default:
-                    value = va_arg(args, int);
-                    break;
-                }
-                if (!fmtint(sbuffer, buffer, &currlen, maxlen, value, 10, min,
-                            max, flags))
-                    return 0;
-                break;
-            case 'X':
-                flags |= DP_F_UP;
-                /* FALLTHROUGH */
-            case 'x':
-            case 'o':
-            case 'u':
-                flags |= DP_F_UNSIGNED;
-                switch (cflags) {
-                case DP_C_SHORT:
-                    value = (unsigned short int)va_arg(args, unsigned int);
-                    break;
-                case DP_C_LONG:
-                    value = (LLONG) va_arg(args, unsigned long int);
-                    break;
-                case DP_C_LLONG:
-                    value = va_arg(args, unsigned LLONG);
-                    break;
-                default:
-                    value = (LLONG) va_arg(args, unsigned int);
-                    break;
-                }
-                if (!fmtint(sbuffer, buffer, &currlen, maxlen, value,
-                            ch == 'o' ? 8 : (ch == 'u' ? 10 : 16),
-                            min, max, flags))
-                    return 0;
-                break;
-            case 'f':
-                if (cflags == DP_C_LDOUBLE)
-                    fvalue = va_arg(args, LDOUBLE);
-                else
-                    fvalue = va_arg(args, double);
-                if (!fmtfp(sbuffer, buffer, &currlen, maxlen, fvalue, min, max,
-                           flags))
-                    return 0;
-                break;
-            case 'E':
-                flags |= DP_F_UP;
-            case 'e':
-                if (cflags == DP_C_LDOUBLE)
-                    fvalue = va_arg(args, LDOUBLE);
-                else
-                    fvalue = va_arg(args, double);
-                break;
-            case 'G':
-                flags |= DP_F_UP;
-            case 'g':
-                if (cflags == DP_C_LDOUBLE)
-                    fvalue = va_arg(args, LDOUBLE);
-                else
-                    fvalue = va_arg(args, double);
-                break;
-            case 'c':
-                if(!doapr_outch(sbuffer, buffer, &currlen, maxlen,
-                            va_arg(args, int)))
-                    return 0;
-                break;
-            case 's':
-                strvalue = va_arg(args, char *);
-                if (max < 0) {
-                    if (buffer)
-                        max = INT_MAX;
-                    else
-                        max = *maxlen;
-                }
-                if (!fmtstr(sbuffer, buffer, &currlen, maxlen, strvalue,
-                            flags, min, max))
-                    return 0;
-                break;
-            case 'p':
-                value = (long)va_arg(args, void *);
-                if (!fmtint(sbuffer, buffer, &currlen, maxlen,
-                            value, 16, min, max, flags | DP_F_NUM))
-                    return 0;
-                break;
-            case 'n':          /* XXX */
-                if (cflags == DP_C_SHORT) {
-                    short int *num;
-                    num = va_arg(args, short int *);
-                    *num = (short int)currlen;
-                } else if (cflags == DP_C_LONG) { /* XXX */
-                    long int *num;
-                    num = va_arg(args, long int *);
-                    *num = (long int)currlen;
-                } else if (cflags == DP_C_LLONG) { /* XXX */
-                    LLONG *num;
-                    num = va_arg(args, LLONG *);
-                    *num = (LLONG) currlen;
-                } else {
-                    int *num;
-                    num = va_arg(args, int *);
-                    *num = currlen;
-                }
-                break;
-            case '%':
-                if(!doapr_outch(sbuffer, buffer, &currlen, maxlen, ch))
-                    return 0;
-                break;
-            case 'w':
-                /* not supported yet, treat as next char */
-                ch = *format++;
-                break;
-            default:
-                /* unknown, skip */
-                break;
-            }
-            ch = *format++;
-            state = DP_S_DEFAULT;
-            flags = cflags = min = 0;
-            max = -1;
-            break;
-        case DP_S_DONE:
-            break;
-        default:
-            break;
-        }
-    }
-    /*
-     * We have to truncate if there is no dynamic buffer and we have filled the
-     * static buffer.
-     */
-    if (buffer == NULL) {
-        *truncated = (currlen > *maxlen - 1);
-        if (*truncated)
-            currlen = *maxlen - 1;
-    }
-    if(!doapr_outch(sbuffer, buffer, &currlen, maxlen, '\0'))
-        return 0;
-    *retlen = currlen - 1;
-    return 1;
-}
-
-static int
-fmtstr(char **sbuffer,
-       char **buffer,
-       size_t *currlen,
-       size_t *maxlen, const char *value, int flags, int min, int max)
-{
-    int padlen;
-    size_t strln;
-    int cnt = 0;
-
-    if (value == 0)
-        value = "<NULL>";
-
-    strln = strlen(value);
-    if (strln > INT_MAX)
-        strln = INT_MAX;
-
-    padlen = min - strln;
-    if (min < 0 || padlen < 0)
-        padlen = 0;
-    if (flags & DP_F_MINUS)
-        padlen = -padlen;
-
-    while ((padlen > 0) && (cnt < max)) {
-        if(!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
-            return 0;
-        --padlen;
-        ++cnt;
-    }
-    while (*value && (cnt < max)) {
-        if(!doapr_outch(sbuffer, buffer, currlen, maxlen, *value++))
-            return 0;
-        ++cnt;
-    }
-    while ((padlen < 0) && (cnt < max)) {
-        if(!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
-            return 0;
-        ++padlen;
-        ++cnt;
-    }
-    return 1;
-}
-
-static int
-fmtint(char **sbuffer,
-       char **buffer,
-       size_t *currlen,
-       size_t *maxlen, LLONG value, int base, int min, int max, int flags)
-{
-    int signvalue = 0;
-    const char *prefix = "";
-    unsigned LLONG uvalue;
-    char convert[DECIMAL_SIZE(value) + 3];
-    int place = 0;
-    int spadlen = 0;
-    int zpadlen = 0;
-    int caps = 0;
-
-    if (max < 0)
-        max = 0;
-    uvalue = value;
-    if (!(flags & DP_F_UNSIGNED)) {
-        if (value < 0) {
-            signvalue = '-';
-            uvalue = 0 - (unsigned LLONG)value;
-        } else if (flags & DP_F_PLUS)
-            signvalue = '+';
-        else if (flags & DP_F_SPACE)
-            signvalue = ' ';
-    }
-    if (flags & DP_F_NUM) {
-        if (base == 8)
-            prefix = "0";
-        if (base == 16)
-            prefix = "0x";
-    }
-    if (flags & DP_F_UP)
-        caps = 1;
-    do {
-        convert[place++] = (caps ? "0123456789ABCDEF" : "0123456789abcdef")
-            [uvalue % (unsigned)base];
-        uvalue = (uvalue / (unsigned)base);
-    } while (uvalue && (place < (int)sizeof(convert)));
-    if (place == sizeof(convert))
-        place--;
-    convert[place] = 0;
-
-    zpadlen = max - place;
-    spadlen =
-        min - OSSL_MAX(max, place) - (signvalue ? 1 : 0) - strlen(prefix);
-    if (zpadlen < 0)
-        zpadlen = 0;
-    if (spadlen < 0)
-        spadlen = 0;
-    if (flags & DP_F_ZERO) {
-        zpadlen = OSSL_MAX(zpadlen, spadlen);
-        spadlen = 0;
-    }
-    if (flags & DP_F_MINUS)
-        spadlen = -spadlen;
-
-    /* spaces */
-    while (spadlen > 0) {
-        if(!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
-            return 0;
-        --spadlen;
-    }
-
-    /* sign */
-    if (signvalue)
-        if(!doapr_outch(sbuffer, buffer, currlen, maxlen, signvalue))
-            return 0;
-
-    /* prefix */
-    while (*prefix) {
-        if(!doapr_outch(sbuffer, buffer, currlen, maxlen, *prefix))
-            return 0;
-        prefix++;
-    }
-
-    /* zeros */
-    if (zpadlen > 0) {
-        while (zpadlen > 0) {
-            if(!doapr_outch(sbuffer, buffer, currlen, maxlen, '0'))
-                return 0;
-            --zpadlen;
-        }
-    }
-    /* digits */
-    while (place > 0) {
-        if (!doapr_outch(sbuffer, buffer, currlen, maxlen, convert[--place]))
-            return 0;
-    }
-
-    /* left justified spaces */
-    while (spadlen < 0) {
-        if (!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
-            return 0;
-        ++spadlen;
-    }
-    return 1;
-}
-
-static LDOUBLE abs_val(LDOUBLE value)
-{
-    LDOUBLE result = value;
-    if (value < 0)
-        result = -value;
-    return result;
-}
-
-static LDOUBLE pow_10(int in_exp)
-{
-    LDOUBLE result = 1;
-    while (in_exp) {
-        result *= 10;
-        in_exp--;
-    }
-    return result;
-}
-
-static long roundv(LDOUBLE value)
-{
-    long intpart;
-    intpart = (long)value;
-    value = value - intpart;
-    if (value >= 0.5)
-        intpart++;
-    return intpart;
-}
-
-static int
-fmtfp(char **sbuffer,
-      char **buffer,
-      size_t *currlen,
-      size_t *maxlen, LDOUBLE fvalue, int min, int max, int flags)
-{
-    int signvalue = 0;
-    LDOUBLE ufvalue;
-    char iconvert[20];
-    char fconvert[20];
-    int iplace = 0;
-    int fplace = 0;
-    int padlen = 0;
-    int zpadlen = 0;
-    long intpart;
-    long fracpart;
-    long max10;
-
-    if (max < 0)
-        max = 6;
-    ufvalue = abs_val(fvalue);
-    if (fvalue < 0)
-        signvalue = '-';
-    else if (flags & DP_F_PLUS)
-        signvalue = '+';
-    else if (flags & DP_F_SPACE)
-        signvalue = ' ';
-
-    intpart = (long)ufvalue;
-
-    /*
-     * sorry, we only support 9 digits past the decimal because of our
-     * conversion method
-     */
-    if (max > 9)
-        max = 9;
-
-    /*
-     * we "cheat" by converting the fractional part to integer by multiplying
-     * by a factor of 10
-     */
-    max10 = roundv(pow_10(max));
-    fracpart = roundv(pow_10(max) * (ufvalue - intpart));
-
-    if (fracpart >= max10) {
-        intpart++;
-        fracpart -= max10;
-    }
-
-    /* convert integer part */
-    do {
-        iconvert[iplace++] = "0123456789"[intpart % 10];
-        intpart = (intpart / 10);
-    } while (intpart && (iplace < (int)sizeof(iconvert)));
-    if (iplace == sizeof(iconvert))
-        iplace--;
-    iconvert[iplace] = 0;
-
-    /* convert fractional part */
-    do {
-        fconvert[fplace++] = "0123456789"[fracpart % 10];
-        fracpart = (fracpart / 10);
-    } while (fplace < max);
-    if (fplace == sizeof(fconvert))
-        fplace--;
-    fconvert[fplace] = 0;
-
-    /* -1 for decimal point, another -1 if we are printing a sign */
-    padlen = min - iplace - max - 1 - ((signvalue) ? 1 : 0);
-    zpadlen = max - fplace;
-    if (zpadlen < 0)
-        zpadlen = 0;
-    if (padlen < 0)
-        padlen = 0;
-    if (flags & DP_F_MINUS)
-        padlen = -padlen;
-
-    if ((flags & DP_F_ZERO) && (padlen > 0)) {
-        if (signvalue) {
-            if (!doapr_outch(sbuffer, buffer, currlen, maxlen, signvalue))
-                return 0;
-            --padlen;
-            signvalue = 0;
-        }
-        while (padlen > 0) {
-            if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '0'))
-                return 0;
-            --padlen;
-        }
-    }
-    while (padlen > 0) {
-        if (!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
-            return 0;
-        --padlen;
-    }
-    if (signvalue && !doapr_outch(sbuffer, buffer, currlen, maxlen, signvalue))
-        return 0;
-
-    while (iplace > 0) {
-        if (!doapr_outch(sbuffer, buffer, currlen, maxlen, iconvert[--iplace]))
-            return 0;
-    }
-
-    /*
-     * Decimal point. This should probably use locale to find the correct
-     * char to print out.
-     */
-    if (max > 0 || (flags & DP_F_NUM)) {
-        if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '.'))
-            return 0;
-
-        while (fplace > 0) {
-            if(!doapr_outch(sbuffer, buffer, currlen, maxlen,
-                            fconvert[--fplace]))
-                return 0;
-        }
-    }
-    while (zpadlen > 0) {
-        if (!doapr_outch(sbuffer, buffer, currlen, maxlen, '0'))
-            return 0;
-        --zpadlen;
-    }
-
-    while (padlen < 0) {
-        if (!doapr_outch(sbuffer, buffer, currlen, maxlen, ' '))
-            return 0;
-        ++padlen;
-    }
-    return 1;
-}
-
-#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 doe a big booboo */
-    assert(*sbuffer != NULL || buffer != NULL);
-
-    /* |currlen| must always be <= |*maxlen| */
-    assert(*currlen <= *maxlen);
-
-    if (buffer && *currlen == *maxlen) {
-        if (*maxlen > INT_MAX - BUFFER_INC)
-            return 0;
-
-        *maxlen += BUFFER_INC;
-        if (*buffer == NULL) {
-            *buffer = OPENSSL_malloc(*maxlen);
-            if (*buffer == NULL)
-                return 0;
-            if (*currlen > 0) {
-                assert(*sbuffer != NULL);
-                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;
@@ -800,32 +85,36 @@ int BIO_printf(BIO *bio, const char *for
     return (ret);
 }
 
+static ssize_t cookie_BIO_write(void *cookie, const char *buf, size_t size)
+{
+        int ret;
+        ret = BIO_write(cookie, buf, size);
+        /* BIO_write may return negative value on error,
+         * but we must return 0 on that case
+         */
+        return (ret < 0) ? 0 : ret;
+}
+
 int BIO_vprintf(BIO *bio, const char *format, va_list args)
 {
+    FILE *fp;
     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;
-    CRYPTO_push_info("doapr()");
-    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);
-    }
-    CRYPTO_pop_info();
+
+    cookie_io_functions_t  bio_funcs = {
+        .read  = NULL,
+        .write = cookie_BIO_write,
+        .seek  = NULL,
+        .close = NULL,
+    };
+
+    fp = fopencookie(bio, "w", bio_funcs);
+
+    if (fp == NULL) 
+            return -1;
+
+    ret = vfprintf(fp, format, args);
+
+    fclose(fp);
     return (ret);
 }
 
@@ -841,29 +130,21 @@ int BIO_snprintf(char *buf, size_t n, co
     int ret;
 
     va_start(args, format);
+    ret = vsnprintf(buf, n, format, args);
+    va_end(args);
 
-    ret = BIO_vsnprintf(buf, n, format, args);
+    if (ret >= n || ret == -1) return (-1);
 
-    va_end(args);
     return (ret);
 }
 
 int BIO_vsnprintf(char *buf, size_t n, const char *format, va_list args)
 {
-    size_t retlen;
-    int truncated;
+    int ret;
+    ret = vsnprintf(buf, n, format, args);
 
-    if(!_dopr(&buf, NULL, &n, &retlen, &truncated, format, args))
-        return -1;
+    if (ret >= n || ret == -1)
+        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;
-    else
-        return (retlen <= INT_MAX) ? (int)retlen : -1;
+    return (ret);
 }

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File 0001-Axe-builtin-printf-implementation-use-glibc-instead.patch of Package openssl-1_0_0.12536

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