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0faf7d933f
Make sure that function declarations use names that exactly match the corresponding names from function definitions in contrib code. Like other recent commits that cleaned up function parameter names, this commit was written with help from clang-tidy. Author: Peter Geoghegan <pg@bowt.ie> Discussion: https://postgr.es/m/CAH2-WznJt9CMM9KJTMjJh_zbL5hD9oX44qdJ4aqZtjFi-zA3Tg@mail.gmail.com
123 lines
3.9 KiB
C
123 lines
3.9 KiB
C
/*
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* mbuf.h
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* Memory buffer operations.
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*
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* Copyright (c) 2005 Marko Kreen
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* contrib/pgcrypto/mbuf.h
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*/
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#ifndef __PX_MBUF_H
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#define __PX_MBUF_H
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typedef struct MBuf MBuf;
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typedef struct PushFilter PushFilter;
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typedef struct PullFilter PullFilter;
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typedef struct PushFilterOps PushFilterOps;
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typedef struct PullFilterOps PullFilterOps;
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struct PushFilterOps
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{
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/*
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* should return needed buffer size, 0- no buffering, <0 on error if NULL,
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* no buffering, and priv=init_arg
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*/
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int (*init) (PushFilter *next, void *init_arg, void **priv_p);
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/*
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* send data to next. should consume all? if null, it will be simply
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* copied (in-place) returns 0 on error
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*/
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int (*push) (PushFilter *next, void *priv,
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const uint8 *src, int len);
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int (*flush) (PushFilter *next, void *priv);
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void (*free) (void *priv);
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};
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struct PullFilterOps
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{
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/*
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* should return needed buffer size, 0- no buffering, <0 on error if NULL,
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* no buffering, and priv=init_arg
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*/
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int (*init) (void **priv_p, void *init_arg, PullFilter *src);
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/*
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* request data from src, put result ptr to data_p can use ptr from src or
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* use buf as work area if NULL in-place copy
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*/
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int (*pull) (void *priv, PullFilter *src, int len,
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uint8 **data_p, uint8 *buf, int buflen);
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void (*free) (void *priv);
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};
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/*
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* Memory buffer
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*/
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MBuf *mbuf_create(int len);
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MBuf *mbuf_create_from_data(uint8 *data, int len);
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int mbuf_avail(MBuf *mbuf);
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int mbuf_size(MBuf *mbuf);
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int mbuf_grab(MBuf *mbuf, int len, uint8 **data_p);
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int mbuf_steal_data(MBuf *mbuf, uint8 **data_p);
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int mbuf_append(MBuf *dst, const uint8 *buf, int len);
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int mbuf_free(MBuf *mbuf);
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/*
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* Push filter
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*/
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int pushf_create(PushFilter **mp_p, const PushFilterOps *op,
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void *init_arg, PushFilter *next);
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int pushf_write(PushFilter *mp, const uint8 *data, int len);
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void pushf_free_all(PushFilter *mp);
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void pushf_free(PushFilter *mp);
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int pushf_flush(PushFilter *mp);
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int pushf_create_mbuf_writer(PushFilter **res, MBuf *dst);
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/*
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* Pull filter
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*/
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int pullf_create(PullFilter **pf_p, const PullFilterOps *op,
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void *init_arg, PullFilter *src);
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int pullf_read(PullFilter *pf, int len, uint8 **data_p);
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int pullf_read_max(PullFilter *pf, int len,
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uint8 **data_p, uint8 *tmpbuf);
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void pullf_free(PullFilter *pf);
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int pullf_read_fixed(PullFilter *src, int len, uint8 *dst);
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int pullf_create_mbuf_reader(PullFilter **mp_p, MBuf *src);
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#define GETBYTE(pf, dst) \
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do { \
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uint8 __b; \
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int __res = pullf_read_fixed(pf, 1, &__b); \
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if (__res < 0) \
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return __res; \
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(dst) = __b; \
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} while (0)
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#endif /* __PX_MBUF_H */
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