df75c2bfcd
While stereotyped repetitions are frowned upon in literature, they serve a useful purpose in manual pages, because it is easier for the user to find certain information if it is always presented in the same way. For that reason, this commit harmonizes the varying formulations in the HISTORY section about which functions, flags, etc. were added in which OpenSSL version. It also attempts to make the pod files more grep friendly by avoiding to insert line breaks between the symbol names and the corresponding version number in which they were introduced (wherever possible). Some punctuation and typographical errors were fixed on the way. Reviewed-by: Tim Hudson <tjh@openssl.org> (Merged from https://github.com/openssl/openssl/pull/7854)
75 lines
2 KiB
Text
75 lines
2 KiB
Text
=pod
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=head1 NAME
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BUF_MEM_new, BUF_MEM_new_ex, BUF_MEM_free, BUF_MEM_grow,
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BUF_MEM_grow_clean, BUF_reverse
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- simple character array structure
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=head1 SYNOPSIS
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#include <openssl/buffer.h>
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BUF_MEM *BUF_MEM_new(void);
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BUF_MEM *BUF_MEM_new_ex(unsigned long flags);
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void BUF_MEM_free(BUF_MEM *a);
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int BUF_MEM_grow(BUF_MEM *str, int len);
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size_t BUF_MEM_grow_clean(BUF_MEM *str, size_t len);
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void BUF_reverse(unsigned char *out, const unsigned char *in, size_t size);
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=head1 DESCRIPTION
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The buffer library handles simple character arrays. Buffers are used for
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various purposes in the library, most notably memory BIOs.
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BUF_MEM_new() allocates a new buffer of zero size.
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BUF_MEM_new_ex() allocates a buffer with the specified flags.
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The flag B<BUF_MEM_FLAG_SECURE> specifies that the B<data> pointer
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should be allocated on the secure heap; see L<CRYPTO_secure_malloc(3)>.
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BUF_MEM_free() frees up an already existing buffer. The data is zeroed
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before freeing up in case the buffer contains sensitive data.
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BUF_MEM_grow() changes the size of an already existing buffer to
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B<len>. Any data already in the buffer is preserved if it increases in
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size.
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BUF_MEM_grow_clean() is similar to BUF_MEM_grow() but it sets any free'd
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or additionally-allocated memory to zero.
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BUF_reverse() reverses B<size> bytes at B<in> into B<out>. If B<in>
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is NULL, the array is reversed in-place.
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=head1 RETURN VALUES
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BUF_MEM_new() returns the buffer or NULL on error.
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BUF_MEM_free() has no return value.
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BUF_MEM_grow() and BUF_MEM_grow_clean() return
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zero on error or the new size (i.e., B<len>).
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=head1 SEE ALSO
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L<bio(7)>,
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L<CRYPTO_secure_malloc(3)>.
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=head1 HISTORY
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The BUF_MEM_new_ex() function was added in OpenSSL 1.1.0.
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=head1 COPYRIGHT
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Copyright 2000-2018 The OpenSSL Project Authors. All Rights Reserved.
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Licensed under the OpenSSL license (the "License"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file LICENSE in the source distribution or at
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L<https://www.openssl.org/source/license.html>.
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=cut
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