Add compilation of c files

asyncio_mongo/_bson/buffer.h

@@ -0,0 +1,56 @@
+/*
+ * Copyright 2009-2012 10gen, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef BUFFER_H
+#define BUFFER_H
+
+/* Note: if any of these functions return a failure condition then the buffer
+ * has already been freed. */
+
+/* A buffer */
+typedef struct buffer* buffer_t;
+/* A position in the buffer */
+typedef int buffer_position;
+
+/* Allocate and return a new buffer.
+ * Return NULL on allocation failure. */
+buffer_t buffer_new(void);
+
+/* Free the memory allocated for `buffer`.
+ * Return non-zero on failure. */
+int buffer_free(buffer_t buffer);
+
+/* Save `size` bytes from the current position in `buffer` (and grow if needed).
+ * Return offset for writing, or -1 on allocation failure. */
+buffer_position buffer_save_space(buffer_t buffer, int size);
+
+/* Write `size` bytes from `data` to `buffer` (and grow if needed).
+ * Return non-zero on allocation failure. */
+int buffer_write(buffer_t buffer, const char* data, int size);
+
+/* Write `size` bytes from `data` to `buffer` at position `position`.
+ * Does not change the internal position of `buffer`.
+ * Return non-zero if buffer isn't large enough for write. */
+int buffer_write_at_position(buffer_t buffer, buffer_position position, const char* data, int size);
+
+/* Getters for the internals of a buffer_t.
+ * Should try to avoid using these as much as possible
+ * since they break the abstraction. */
+buffer_position buffer_get_position(buffer_t buffer);
+char* buffer_get_buffer(buffer_t buffer);
+void buffer_update_position(buffer_t buffer, buffer_position new_position);
+
+#endif