49 lines
1.1 KiB
C
49 lines
1.1 KiB
C
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// Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) All rights reserved.
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// SPDX-License-Identifier: Apache-2.0
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#include <openssl/bio.h>
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#include <assert.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <openssl/err.h>
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#include <openssl/mem.h>
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int BIO_printf(BIO *bio, const char *format, ...) {
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va_list args;
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char buf[256], *out, out_malloced = 0;
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int out_len, ret;
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va_start(args, format);
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out_len = vsnprintf(buf, sizeof(buf), format, args);
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va_end(args);
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if (out_len < 0) {
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return -1;
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}
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if ((size_t) out_len >= sizeof(buf)) {
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const size_t requested_len = (size_t)out_len;
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// The output was truncated. Note that vsnprintf's return value does not
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// include a trailing NUL, but the buffer must be sized for it.
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out = OPENSSL_malloc(requested_len + 1);
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out_malloced = 1;
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if (out == NULL) {
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return -1;
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}
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va_start(args, format);
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out_len = vsnprintf(out, requested_len + 1, format, args);
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va_end(args);
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assert(out_len == (int)requested_len);
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} else {
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out = buf;
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}
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ret = BIO_write(bio, out, out_len);
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if (out_malloced) {
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OPENSSL_free(out);
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}
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return ret;
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}
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