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e3860ffa4d
The new indent version includes numerous fixes thanks to Piotr Stefaniak. The main changes visible in this commit are: * Nicer formatting of function-pointer declarations. * No longer unexpectedly removes spaces in expressions using casts, sizeof, or offsetof. * No longer wants to add a space in "struct structname *varname", as well as some similar cases for const- or volatile-qualified pointers. * Declarations using PG_USED_FOR_ASSERTS_ONLY are formatted more nicely. * Fixes bug where comments following declarations were sometimes placed with no space separating them from the code. * Fixes some odd decisions for comments following case labels. * Fixes some cases where comments following code were indented to less than the expected column 33. On the less good side, it now tends to put more whitespace around typedef names that are not listed in typedefs.list. This might encourage us to put more effort into typedef name collection; it's not really a bug in indent itself. There are more changes coming after this round, having to do with comment indentation and alignment of lines appearing within parentheses. I wanted to limit the size of the diffs to something that could be reviewed without one's eyes completely glazing over, so it seemed better to split up the changes as much as practical. Discussion: https://postgr.es/m/E1dAmxK-0006EE-1r@gemulon.postgresql.org Discussion: https://postgr.es/m/30527.1495162840@sss.pgh.pa.us
125 lines
3.9 KiB
C
125 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_tell(MBuf *mbuf);
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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 cnt);
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int mbuf_rewind(MBuf *mbuf);
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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 **res, const PushFilterOps *ops, void *init_arg,
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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 **mp_p, MBuf *mbuf);
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/*
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* Pull filter
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*/
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int pullf_create(PullFilter **res, const PullFilterOps *ops,
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void *init_arg, PullFilter *src);
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int pullf_read(PullFilter *mp, int len, uint8 **data_p);
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int pullf_read_max(PullFilter *mp, int len,
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uint8 **data_p, uint8 *tmpbuf);
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void pullf_free(PullFilter *mp);
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int pullf_read_fixed(PullFilter *src, int len, uint8 *dst);
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int pullf_create_mbuf_reader(PullFilter **pf_p, MBuf *mbuf);
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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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