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d62af6abe4
Directly including stddef.h in many files results in it being processed multiple times while it can be centralized in api-t.h and be guarded against multiple inclusions. Doing so reduces the number of preprocessed lines by 1200!
63 lines
2.3 KiB
C
63 lines
2.3 KiB
C
/*
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* include/haproxy/buf-t.h
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* Simple buffer handling - types definitions.
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*
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* Copyright (C) 2000-2020 Willy Tarreau - w@1wt.eu
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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
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* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef _HAPROXY_BUF_T_H
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#define _HAPROXY_BUF_T_H
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#include <haproxy/api-t.h>
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/* Structure defining a buffer's head */
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struct buffer {
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size_t size; /* buffer size in bytes */
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char *area; /* points to <size> bytes */
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size_t data; /* amount of data after head including wrapping */
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size_t head; /* start offset of remaining data relative to area */
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};
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/* A buffer may be in 3 different states :
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* - unallocated : size == 0, area == 0 (b_is_null() is true)
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* - waiting : size == 0, area != 0 (b_is_null() is true)
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* - allocated : size > 0, area > 0 (b_is_null() is false)
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*/
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/* initializers for certain buffer states. It is important that the NULL buffer
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* remains the one with all fields initialized to zero so that a calloc() or a
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* memset() on a struct automatically sets a NULL buffer.
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*/
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#define BUF_NULL ((struct buffer){ })
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#define BUF_WANTED ((struct buffer){ .area = (char *)1 })
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#define BUF_RING ((struct buffer){ .area = (char *)2 })
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#endif /* _HAPROXY_BUF_T_H */
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/*
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* Local variables:
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* c-indent-level: 8
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* c-basic-offset: 8
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* End:
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*/
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