mirror of
https://github.com/stargieg/bacnet-stack
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81 lines
3.2 KiB
C
81 lines
3.2 KiB
C
/**************************************************************************
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*
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* Copyright (C) 2012 Steve Karg <skarg@users.sourceforge.net>
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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 included
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* 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 NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*********************************************************************/
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#ifndef SBUF_H
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#define SBUF_H
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/* Functional Description: Static buffer library for deeply
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embedded system. See the unit tests for usage examples. */
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#include <stdint.h>
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#include <stdbool.h>
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struct static_buffer_t {
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char *data; /* block of memory or array of data */
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unsigned size; /* actual size, in bytes, of the block of data */
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unsigned count; /* number of bytes in use */
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};
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typedef struct static_buffer_t STATIC_BUFFER;
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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void sbuf_init(
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STATIC_BUFFER * b, /* static buffer structure */
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char *data, /* data block */
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unsigned size); /* actual size, in bytes, of the data block or array of data */
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/* returns true if size==0, false if size > 0 */
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bool sbuf_empty(
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STATIC_BUFFER const *b);
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/* returns the data block, or NULL if not initialized */
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char *sbuf_data(
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STATIC_BUFFER const *b);
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/* returns the max size of the data block */
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unsigned sbuf_size(
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STATIC_BUFFER * b);
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/* returns the number of bytes used in the data block */
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unsigned sbuf_count(
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STATIC_BUFFER * b);
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/* returns true if successful, false if not enough room to append data */
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bool sbuf_put(
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STATIC_BUFFER * b, /* static buffer structure */
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unsigned offset, /* where to start */
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char *data, /* data to add */
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unsigned data_size); /* how many to add */
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/* returns true if successful, false if not enough room to append data */
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bool sbuf_append(
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STATIC_BUFFER * b, /* static buffer structure */
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char *data, /* data to append */
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unsigned data_size); /* how many to append */
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/* returns true if successful, false if count is bigger than size */
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bool sbuf_truncate(
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STATIC_BUFFER * b, /* static buffer structure */
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unsigned count); /* new number of bytes used in buffer */
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif
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