85 lines
2.4 KiB
C
85 lines
2.4 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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#ifndef OPENSSL_HEADER_BUFFER_H
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#define OPENSSL_HEADER_BUFFER_H
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#include <openssl/base.h>
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#if defined(__cplusplus)
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extern "C" {
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#endif
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// Memory and string functions, see also mem.h.
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// buf_mem_st (aka |BUF_MEM|) is a generic buffer object used by OpenSSL.
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struct buf_mem_st {
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size_t length; // current number of bytes
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char *data;
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size_t max; // size of buffer
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};
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// BUF_MEM_new creates a new BUF_MEM which has no allocated data buffer.
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OPENSSL_EXPORT BUF_MEM *BUF_MEM_new(void);
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// BUF_MEM_free frees |buf->data| if needed and then frees |buf| itself.
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OPENSSL_EXPORT void BUF_MEM_free(BUF_MEM *buf);
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// BUF_MEM_reserve ensures |buf| has capacity |cap| and allocates memory if
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// needed. It returns one on success and zero on error.
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OPENSSL_EXPORT int BUF_MEM_reserve(BUF_MEM *buf, size_t cap);
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// BUF_MEM_grow ensures that |buf| has length |len| and allocates memory if
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// needed. If the length of |buf| increased, the new bytes are filled with
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// zeros. It returns the length of |buf|, or zero if there's an error.
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OPENSSL_EXPORT size_t BUF_MEM_grow(BUF_MEM *buf, size_t len);
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// BUF_MEM_grow_clean calls |BUF_MEM_grow|. BoringSSL always zeros memory
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// allocated memory on free.
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OPENSSL_EXPORT size_t BUF_MEM_grow_clean(BUF_MEM *buf, size_t len);
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// BUF_MEM_append appends |in| to |buf|. It returns one on success and zero on
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// error.
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OPENSSL_EXPORT int BUF_MEM_append(BUF_MEM *buf, const void *in, size_t len);
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// Deprecated functions.
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// BUF_strdup calls |OPENSSL_strdup|.
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OPENSSL_EXPORT char *BUF_strdup(const char *str);
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// BUF_strnlen calls |OPENSSL_strnlen|.
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OPENSSL_EXPORT size_t BUF_strnlen(const char *str, size_t max_len);
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// BUF_strndup calls |OPENSSL_strndup|.
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OPENSSL_EXPORT char *BUF_strndup(const char *str, size_t size);
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// BUF_memdup calls |OPENSSL_memdup|.
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OPENSSL_EXPORT void *BUF_memdup(const void *data, size_t size);
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// BUF_strlcpy calls |OPENSSL_strlcpy|.
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OPENSSL_EXPORT size_t BUF_strlcpy(char *dst, const char *src, size_t dst_size);
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// BUF_strlcat calls |OPENSSL_strlcat|.
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OPENSSL_EXPORT size_t BUF_strlcat(char *dst, const char *src, size_t dst_size);
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#if defined(__cplusplus)
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} // extern C
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extern "C++" {
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BSSL_NAMESPACE_BEGIN
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BORINGSSL_MAKE_DELETER(BUF_MEM, BUF_MEM_free)
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BSSL_NAMESPACE_END
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} // extern C++
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#endif
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#endif // OPENSSL_HEADER_BUFFER_H
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