mirror of https://github.com/nodejs/node.git
100 lines
3.1 KiB
C
100 lines
3.1 KiB
C
/*
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* nghttp3
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*
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* Copyright (c) 2019 nghttp3 contributors
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* Copyright (c) 2017 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 NGHTTP3_GAPTR_H
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#define NGHTTP3_GAPTR_H
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif /* HAVE_CONFIG_H */
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#include <nghttp3/nghttp3.h>
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#include "nghttp3_mem.h"
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#include "nghttp3_ksl.h"
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#include "nghttp3_range.h"
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/*
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* nghttp3_gaptr maintains the gap in the range [0, UINT64_MAX).
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*/
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typedef struct nghttp3_gaptr {
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/* gap maintains the range of offset which is not received
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yet. Initially, its range is [0, UINT64_MAX). */
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nghttp3_ksl gap;
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/* mem is custom memory allocator */
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const nghttp3_mem *mem;
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} nghttp3_gaptr;
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/*
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* nghttp3_gaptr_init initializes |gaptr|.
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*/
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void nghttp3_gaptr_init(nghttp3_gaptr *gaptr, const nghttp3_mem *mem);
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/*
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* nghttp3_gaptr_free frees resources allocated for |gaptr|.
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*/
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void nghttp3_gaptr_free(nghttp3_gaptr *gaptr);
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/*
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* nghttp3_gaptr_push adds new data of length |datalen| at the stream
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* offset |offset|.
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*
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* This function returns 0 if it succeeds, or one of the following
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* negative error codes:
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*
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* NGHTTP3_ERR_NOMEM
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* Out of memory
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*/
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int nghttp3_gaptr_push(nghttp3_gaptr *gaptr, uint64_t offset, uint64_t datalen);
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/*
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* nghttp3_gaptr_first_gap_offset returns the offset to the first gap.
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* If there is no gap, it returns UINT64_MAX.
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*/
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uint64_t nghttp3_gaptr_first_gap_offset(nghttp3_gaptr *gaptr);
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/*
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* nghttp3_gaptr_get_first_gap_after returns the first gap which
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* overlaps or comes after |offset|.
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*/
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nghttp3_range nghttp3_gaptr_get_first_gap_after(nghttp3_gaptr *gaptr,
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uint64_t offset);
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/*
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* nghttp3_gaptr_is_pushed returns nonzero if range [offset, offset +
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* datalen) is completely pushed into this object.
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*/
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int nghttp3_gaptr_is_pushed(nghttp3_gaptr *gaptr, uint64_t offset,
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uint64_t datalen);
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/*
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* nghttp3_gaptr_drop_first_gap deletes the first gap entirely as if
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* the range is pushed. This function assumes that at least one gap
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* exists.
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*/
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void nghttp3_gaptr_drop_first_gap(nghttp3_gaptr *gaptr);
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#endif /* NGHTTP3_GAPTR_H */
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