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dceb1fca40
Signed-off-by: James M Snell <jasnell@gmail.com> PR-URL: https://github.com/nodejs/node/pull/59249 Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
99 lines
4 KiB
C
99 lines
4 KiB
C
/*
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* ngtcp2
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*
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* Copyright (c) 2018 ngtcp2 contributors
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef NGTCP2_VEC_H
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#define NGTCP2_VEC_H
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif /* defined(HAVE_CONFIG_H) */
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#include <ngtcp2/ngtcp2.h>
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#include "ngtcp2_mem.h"
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/*
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* ngtcp2_vec_init initializes |vec| with the given parameters. It
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* returns |vec|.
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*/
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ngtcp2_vec *ngtcp2_vec_init(ngtcp2_vec *vec, const uint8_t *base, size_t len);
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/*
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* ngtcp2_vec_len returns the sum of length in |vec| of |n| elements.
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*/
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uint64_t ngtcp2_vec_len(const ngtcp2_vec *vec, size_t n);
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/*
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* ngtcp2_vec_len_varint is similar to ngtcp2_vec_len, but it returns
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* -1 if the sum of the length exceeds NGTCP2_MAX_VARINT.
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*/
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int64_t ngtcp2_vec_len_varint(const ngtcp2_vec *vec, size_t n);
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/*
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* ngtcp2_vec_split splits |src| at the data position where
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* ngtcp2_vec_len(|src|) does not exceed |left| bytes. The removed
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* vectors are moved to |dst|. The existing elements in |dst| are
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* moved forward to make up a space. The |maxcnt| is the maximum
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* number of elements which |dst| array can contain. The caller must
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* set |*psrccnt| to the number of elements of |src|. Similarly, the
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* caller must set |*pdstcnt| to the number of elements of |dst|. The
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* split does not necessarily occur at the boundary of ngtcp2_vec
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* object. After split has done, this function updates |*psrccnt| and
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* |*pdstcnt|. This function returns the number of bytes moved from
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* |src| to |dst|. If split cannot be made because doing so exceeds
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* |maxcnt|, this function returns -1.
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*/
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ngtcp2_ssize ngtcp2_vec_split(ngtcp2_vec *dst, size_t *pdstcnt, ngtcp2_vec *src,
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size_t *psrccnt, size_t left, size_t maxcnt);
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/*
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* ngtcp2_vec_merge merges |src| into |dst| by moving at most |left|
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* bytes from |src|. The |maxcnt| is the maximum number of elements
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* which |dst| array can contain. The caller must set |*pdstcnt| to
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* the number of elements of |dst|. Similarly, the caller must set
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* |*psrccnt| to the number of elements of |src|. After merge has
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* done, this function updates |*psrccnt| and |*pdstcnt|. This
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* function returns the number of bytes moved from |src| to |dst|.
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*/
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size_t ngtcp2_vec_merge(ngtcp2_vec *dst, size_t *pdstcnt, ngtcp2_vec *src,
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size_t *psrccnt, size_t left, size_t maxcnt);
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/*
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* ngtcp2_vec_copy_at_most copies |src| of length |srccnt| to |dst| of
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* length |dstcnt|. The total number of bytes which the copied
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* ngtcp2_vec refers to is at most |left|. The empty elements in
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* |src| are ignored. This function returns the number of elements
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* copied.
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*/
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size_t ngtcp2_vec_copy_at_most(ngtcp2_vec *dst, size_t dstcnt,
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const ngtcp2_vec *src, size_t srccnt,
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size_t left);
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/*
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* ngtcp2_vec_copy copies |src| of length |cnt| to |dst|. |dst| must
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* have sufficient capacity.
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*/
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void ngtcp2_vec_copy(ngtcp2_vec *dst, const ngtcp2_vec *src, size_t cnt);
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#endif /* !defined(NGTCP2_VEC_H) */
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