5 * Author: Tatu Ylonen <ylo@cs.hut.fi>
7 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
10 * Created: Sat Mar 18 04:12:25 1995 ylo
12 * Code for manipulating FIFO buffers.
22 char *buf; /* Buffer for data. */
23 unsigned int alloc; /* Number of bytes allocated for data. */
24 unsigned int offset; /* Offset of first byte containing data. */
25 unsigned int end; /* Offset of last byte containing data. */
27 /* Initializes the buffer structure. */
28 void buffer_init(Buffer * buffer);
30 /* Frees any memory used for the buffer. */
31 void buffer_free(Buffer * buffer);
33 /* Clears any data from the buffer, making it empty. This does not actually
35 void buffer_clear(Buffer * buffer);
37 /* Appends data to the buffer, expanding it if necessary. */
38 void buffer_append(Buffer * buffer, const char *data, unsigned int len);
41 * Appends space to the buffer, expanding the buffer if necessary. This does
42 * not actually copy the data into the buffer, but instead returns a pointer
43 * to the allocated region.
45 void buffer_append_space(Buffer * buffer, char **datap, unsigned int len);
47 /* Returns the number of bytes of data in the buffer. */
48 unsigned int buffer_len(Buffer * buffer);
50 /* Gets data from the beginning of the buffer. */
51 void buffer_get(Buffer * buffer, char *buf, unsigned int len);
53 /* Consumes the given number of bytes from the beginning of the buffer. */
54 void buffer_consume(Buffer * buffer, unsigned int bytes);
56 /* Consumes the given number of bytes from the end of the buffer. */
57 void buffer_consume_end(Buffer * buffer, unsigned int bytes);
59 /* Returns a pointer to the first used byte in the buffer. */
60 char *buffer_ptr(Buffer * buffer);
63 * Dumps the contents of the buffer to stderr in hex. This intended for
64 * debugging purposes only.
66 void buffer_dump(Buffer * buffer);