61 lines
2.2 KiB
C
61 lines
2.2 KiB
C
/*
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* Copyright 2009-2010 10gen, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef _BSON_BUFFER_H
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#define _BSON_BUFFER_H
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/* Note: if any of these functions return a failure condition then the buffer
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* has already been freed. */
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/* A buffer */
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typedef struct bson_buffer* bson_buffer_t;
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/* A position in the buffer */
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typedef int bson_buffer_position;
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/* Allocate and return a new buffer.
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* Return NULL on allocation failure. */
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bson_buffer_t bson_buffer_new(void);
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/* Set the max size for this buffer.
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* Note: this is not a hard limit. */
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void bson_buffer_set_max_size(bson_buffer_t buffer, int max_size);
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int bson_buffer_get_max_size(bson_buffer_t buffer);
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/* Free the memory allocated for `buffer`.
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* Return non-zero on failure. */
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int bson_buffer_free(bson_buffer_t buffer);
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/* Save `size` bytes from the current position in `buffer` (and grow if needed).
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* Return offset for writing, or -1 on allocation failure. */
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bson_buffer_position bson_buffer_save_space(bson_buffer_t buffer, int size);
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/* Write `size` bytes from `data` to `buffer` (and grow if needed).
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* Return non-zero on allocation failure. */
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int bson_buffer_write(bson_buffer_t buffer, const char* data, int size);
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/* Write `size` bytes from `data` to `buffer` at position `position`.
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* Does not change the internal position of `buffer`.
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* Return non-zero if buffer isn't large enough for write. */
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int bson_buffer_write_at_position(bson_buffer_t buffer, bson_buffer_position position, const char* data, int size);
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/* Getters for the internals of a bson_buffer_t.
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* Should try to avoid using these as much as possible
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* since they break the abstraction. */
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bson_buffer_position bson_buffer_get_position(bson_buffer_t buffer);
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char* bson_buffer_get_buffer(bson_buffer_t buffer);
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#endif
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