Martin Casado
64 lines
2.5 KiB
C
64 lines
2.5 KiB
C
/* Copyright (C) 2007 Board of Trustees, Leland Stanford Jr. University.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* 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, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, 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 OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#ifndef BUFFER_H
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#define BUFFER_H 1
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#include <stddef.h>
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/* Buffer for holding arbitrary data. A buffer is automatically reallocated as
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* necessary if it grows too large for the available memory. */
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struct buffer {
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void *base; /* First byte of area malloc()'d area. */
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size_t allocated; /* Number of bytes allocated. */
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void *data; /* First byte actually in use. */
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size_t size; /* Number of bytes in use. */
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struct buffer *next; /* Next in a list of buffers. */
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};
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void buffer_use(struct buffer *, void *, size_t);
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void buffer_init(struct buffer *, size_t);
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void buffer_uninit(struct buffer *);
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void buffer_reinit(struct buffer *, size_t);
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struct buffer *buffer_new(size_t);
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void buffer_delete(struct buffer *);
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void *buffer_at(const struct buffer *, size_t offset, size_t size);
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void *buffer_at_assert(const struct buffer *, size_t offset, size_t size);
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void *buffer_tail(const struct buffer *);
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void *buffer_end(const struct buffer *);
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void *buffer_put_uninit(struct buffer *, size_t);
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void buffer_put(struct buffer *, const void *, size_t);
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size_t buffer_headroom(struct buffer *);
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size_t buffer_tailroom(struct buffer *);
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void buffer_reserve_tailroom(struct buffer *, size_t);
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void buffer_clear(struct buffer *);
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void buffer_pull(struct buffer *, size_t);
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#endif /* buffer.h */
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