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// Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <contrib/restricted/google/boringssl/include/openssl/bio.h>
#include <assert.h>
#include <stdarg.h>
#include <stdio.h>
#include <contrib/restricted/google/boringssl/include/openssl/err.h>
#include <contrib/restricted/google/boringssl/include/openssl/mem.h>
int BIO_printf(BIO *bio, const char *format, ...) {
va_list args;
char buf[256], *out, out_malloced = 0;
int out_len, ret;
va_start(args, format);
out_len = vsnprintf(buf, sizeof(buf), format, args);
va_end(args);
if (out_len < 0) {
return -1;
}
if ((size_t)out_len >= sizeof(buf)) {
const size_t requested_len = (size_t)out_len;
// The output was truncated. Note that vsnprintf's return value does not
// include a trailing NUL, but the buffer must be sized for it.
out = reinterpret_cast<char *>(OPENSSL_malloc(requested_len + 1));
out_malloced = 1;
if (out == nullptr) {
return -1;
}
va_start(args, format);
out_len = vsnprintf(out, requested_len + 1, format, args);
va_end(args);
assert(out_len == (int)requested_len);
} else {
out = buf;
}
ret = BIO_write(bio, out, out_len);
if (out_malloced) {
OPENSSL_free(out);
}
return ret;
}
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