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/*
* ngtcp2
*
* Copyright (c) 2017 ngtcp2 contributors
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef NGTCP2_CONV_H
#define NGTCP2_CONV_H
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif /* HAVE_CONFIG_H */
#include <ngtcp2/ngtcp2.h>
/*
* ngtcp2_get_uint64 reads 8 bytes from |p| as 64 bits unsigned
* integer encoded as network byte order, and stores it in the buffer
* pointed by |dest| in host byte order. It returns |p| + 8.
*/
const uint8_t *ngtcp2_get_uint64(uint64_t *dest, const uint8_t *p);
/*
* ngtcp2_get_uint48 reads 6 bytes from |p| as 48 bits unsigned
* integer encoded as network byte order, and stores it in the buffer
* pointed by |dest| in host byte order. It returns |p| + 6.
*/
const uint8_t *ngtcp2_get_uint48(uint64_t *dest, const uint8_t *p);
/*
* ngtcp2_get_uint32 reads 4 bytes from |p| as 32 bits unsigned
* integer encoded as network byte order, and stores it in the buffer
* pointed by |dest| in host byte order. It returns |p| + 4.
*/
const uint8_t *ngtcp2_get_uint32(uint32_t *dest, const uint8_t *p);
/*
* ngtcp2_get_uint24 reads 3 bytes from |p| as 24 bits unsigned
* integer encoded as network byte order, and stores it in the buffer
* pointed by |dest| in host byte order. It returns |p| + 3.
*/
const uint8_t *ngtcp2_get_uint24(uint32_t *dest, const uint8_t *p);
/*
* ngtcp2_get_uint16 reads 2 bytes from |p| as 16 bits unsigned
* integer encoded as network byte order, and stores it in the buffer
* pointed by |dest| in host byte order. It returns |p| + 2.
*/
const uint8_t *ngtcp2_get_uint16(uint16_t *dest, const uint8_t *p);
/*
* ngtcp2_get_uint16be reads 2 bytes from |p| as 16 bits unsigned
* integer encoded as network byte order, and stores it in the buffer
* pointed by |dest| as is. It returns |p| + 2.
*/
const uint8_t *ngtcp2_get_uint16be(uint16_t *dest, const uint8_t *p);
/*
* ngtcp2_get_uvarint reads variable-length unsigned integer from |p|,
* and stores it in the buffer pointed by |dest| in host byte order.
* It returns |p| plus the number of bytes read from |p|.
*/
const uint8_t *ngtcp2_get_uvarint(uint64_t *dest, const uint8_t *p);
/*
* ngtcp2_get_varint reads variable-length unsigned integer from |p|,
* and casts it to the signed integer, and stores it in the buffer
* pointed by |dest| in host byte order. No information should be
* lost in this cast, because the variable-length integer is 62
* bits. It returns |p| plus the number of bytes read from |p|.
*/
const uint8_t *ngtcp2_get_varint(int64_t *dest, const uint8_t *p);
/*
* ngtcp2_get_pkt_num reads encoded packet number from |p|. The
* packet number is encoed in |pkt_numlen| bytes.
*/
int64_t ngtcp2_get_pkt_num(const uint8_t *p, size_t pkt_numlen);
/*
* ngtcp2_put_uint64be writes |n| in host byte order in |p| in network
* byte order. It returns the one beyond of the last written
* position.
*/
uint8_t *ngtcp2_put_uint64be(uint8_t *p, uint64_t n);
/*
* ngtcp2_put_uint48be writes |n| in host byte order in |p| in network
* byte order. It writes only least significant 48 bits. It returns
* the one beyond of the last written position.
*/
uint8_t *ngtcp2_put_uint48be(uint8_t *p, uint64_t n);
/*
* ngtcp2_put_uint32be writes |n| in host byte order in |p| in network
* byte order. It returns the one beyond of the last written
* position.
*/
uint8_t *ngtcp2_put_uint32be(uint8_t *p, uint32_t n);
/*
* ngtcp2_put_uint24be writes |n| in host byte order in |p| in network
* byte order. It writes only least significant 24 bits. It returns
* the one beyond of the last written position.
*/
uint8_t *ngtcp2_put_uint24be(uint8_t *p, uint32_t n);
/*
* ngtcp2_put_uint16be writes |n| in host byte order in |p| in network
* byte order. It returns the one beyond of the last written
* position.
*/
uint8_t *ngtcp2_put_uint16be(uint8_t *p, uint16_t n);
/*
* ngtcp2_put_uint16 writes |n| as is in |p|. It returns the one
* beyond of the last written position.
*/
uint8_t *ngtcp2_put_uint16(uint8_t *p, uint16_t n);
/*
* ngtcp2_put_uvarint writes |n| in |p| using variable-length integer
* encoding. It returns the one beyond of the last written position.
*/
uint8_t *ngtcp2_put_uvarint(uint8_t *p, uint64_t n);
/*
* ngtcp2_put_uvarint30 writes |n| in |p| using variable-length
* integer encoding. |n| must be strictly less than 1073741824. The
* function always encodes |n| in 4 bytes. It returns the one beyond
* of the last written position.
*/
uint8_t *ngtcp2_put_uvarint30(uint8_t *p, uint32_t n);
/*
* ngtcp2_put_pkt_num encodes |pkt_num| using |len| bytes. It
* returns the one beyond of the last written position.
*/
uint8_t *ngtcp2_put_pkt_num(uint8_t *p, int64_t pkt_num, size_t len);
/*
* ngtcp2_get_uvarintlen returns the required number of bytes to read
* variable-length integer starting at |p|.
*/
size_t ngtcp2_get_uvarintlen(const uint8_t *p);
/*
* ngtcp2_put_uvarintlen returns the required number of bytes to
* encode |n|.
*/
size_t ngtcp2_put_uvarintlen(uint64_t n);
/*
* ngtcp2_nth_server_bidi_id returns |n|-th server bidirectional
* stream ID. If |n| is 0, it returns 0. If the |n|-th stream ID is
* larger than NGTCP2_MAX_SERVER_STREAM_ID_BIDI, this function returns
* NGTCP2_MAX_SERVER_STREAM_ID_BIDI.
*/
int64_t ngtcp2_nth_server_bidi_id(uint64_t n);
/*
* ngtcp2_nth_client_bidi_id returns |n|-th client bidirectional
* stream ID. If |n| is 0, it returns 0. If the |n|-th stream ID is
* larger than NGTCP2_MAX_CLIENT_STREAM_ID_BIDI, this function returns
* NGTCP2_MAX_CLIENT_STREAM_ID_BIDI.
*/
int64_t ngtcp2_nth_client_bidi_id(uint64_t n);
/*
* ngtcp2_nth_server_uni_id returns |n|-th server unidirectional
* stream ID. If |n| is 0, it returns 0. If the |n|-th stream ID is
* larger than NGTCP2_MAX_SERVER_STREAM_ID_UNI, this function returns
* NGTCP2_MAX_SERVER_STREAM_ID_UNI.
*/
int64_t ngtcp2_nth_server_uni_id(uint64_t n);
/*
* ngtcp2_nth_client_uni_id returns |n|-th client unidirectional
* stream ID. If |n| is 0, it returns 0. If the |n|-th stream ID is
* larger than NGTCP2_MAX_CLIENT_STREAM_ID_UNI, this function returns
* NGTCP2_MAX_CLIENT_STREAM_ID_UNI.
*/
int64_t ngtcp2_nth_client_uni_id(uint64_t n);
/*
* ngtcp2_ord_stream_id returns the ordinal number of |stream_id|.
*/
uint64_t ngtcp2_ord_stream_id(int64_t stream_id);
#endif /* NGTCP2_CONV_H */
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