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51 lines
1.8 KiB
51 lines
1.8 KiB
/* |
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* Copyright 2009-2015 MongoDB, 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 BUFFER_H |
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#define 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 buffer* buffer_t; |
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/* A position in the buffer */ |
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typedef int 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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buffer_t pymongo_buffer_new(void); |
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/* Free the memory allocated for `buffer`. |
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* Return non-zero on failure. */ |
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int pymongo_buffer_free(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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buffer_position pymongo_buffer_save_space(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 pymongo_buffer_write(buffer_t buffer, const char* data, int size); |
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/* Getters for the internals of a 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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buffer_position pymongo_buffer_get_position(buffer_t buffer); |
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char* pymongo_buffer_get_buffer(buffer_t buffer); |
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void pymongo_buffer_update_position(buffer_t buffer, buffer_position new_position); |
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#endif
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