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/* $OpenBSD: b_print.c,v 1.26 2019/06/28 05:47:57 deraadt Exp $ */
/* Theo de Raadt places this file in the public domain. */
#include <openssl/bio.h>
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);
}
#ifdef HAVE_FUNOPEN
static int
_BIO_write(void *cookie, const char *buf, int nbytes)
{
return BIO_write(cookie, buf, nbytes);
}
int
BIO_vprintf(BIO *bio, const char *format, va_list args)
{
int ret;
FILE *fp;
fp = funopen(bio, NULL, &_BIO_write, NULL, NULL);
if (fp == NULL) {
ret = -1;
goto fail;
}
ret = vfprintf(fp, format, args);
fclose(fp);
fail:
return (ret);
}
#else /* !HAVE_FUNOPEN */
int
BIO_vprintf(BIO *bio, const char *format, va_list args)
{
int ret;
char *buf = NULL;
ret = vasprintf(&buf, format, args);
if (ret == -1)
return (ret);
BIO_write(bio, buf, ret);
free(buf);
return (ret);
}
#endif /* HAVE_FUNOPEN */
/*
* BIO_snprintf and BIO_vsnprintf return -1 for overflow,
* due to the history of this API. Justification:
*
* Traditional snprintf surfaced in 4.4BSD, and returned
* "number of bytes wanted". Solaris and Windows opted to
* return -1. A draft standard was written which returned -1.
* Due to the large volume of code already using the first
* semantics, the draft was repaired before standardization to
* specify "number of bytes wanted" plus "-1 for character conversion
* style errors". Solaris adapted to this rule, but Windows stuck
* with -1.
*
* Original OpenSSL comment which is full of lies:
*
* "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.)"
*/
int
BIO_snprintf(char *buf, size_t n, const char *format, ...)
{
va_list args;
int ret;
va_start(args, format);
ret = vsnprintf(buf, n, format, args);
va_end(args);
if (ret >= n || ret == -1)
return (-1);
return (ret);
}
int
BIO_vsnprintf(char *buf, size_t n, const char *format, va_list args)
{
int ret;
ret = vsnprintf(buf, n, format, args);
if (ret >= n || ret == -1)
return (-1);
return (ret);
}
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