67 lines
2.3 KiB
C
67 lines
2.3 KiB
C
/*
|
|
* Author: Tatu Ylonen <ylo@cs.hut.fi>
|
|
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
|
|
* All rights reserved
|
|
* Code for manipulating FIFO buffers.
|
|
*
|
|
* As far as I am concerned, the code I have written for this software
|
|
* can be used freely for any purpose. Any derived versions of this
|
|
* software must be clearly marked as such, and if the derived work is
|
|
* incompatible with the protocol description in the RFC file, it must be
|
|
* called by a name other than "ssh" or "Secure Shell".
|
|
*/
|
|
|
|
/* RCSID("$OpenBSD: buffer.h,v 1.7 2000/12/19 23:17:55 markus Exp $"); */
|
|
|
|
#ifndef BUFFER_H
|
|
#define BUFFER_H
|
|
|
|
typedef struct {
|
|
char *buf; /* Buffer for data. */
|
|
u_int alloc; /* Number of bytes allocated for data. */
|
|
u_int offset; /* Offset of first byte containing data. */
|
|
u_int end; /* Offset of last byte containing data. */
|
|
} Buffer;
|
|
/* Initializes the buffer structure. */
|
|
void buffer_init(Buffer * buffer);
|
|
|
|
/* Frees any memory used for the buffer. */
|
|
void buffer_free(Buffer * buffer);
|
|
|
|
/* Clears any data from the buffer, making it empty. This does not actually
|
|
zero the memory. */
|
|
void buffer_clear(Buffer * buffer);
|
|
|
|
/* Appends data to the buffer, expanding it if necessary. */
|
|
void buffer_append(Buffer * buffer, const char *data, u_int len);
|
|
|
|
/*
|
|
* Appends space to the buffer, expanding the buffer if necessary. This does
|
|
* not actually copy the data into the buffer, but instead returns a pointer
|
|
* to the allocated region.
|
|
*/
|
|
void buffer_append_space(Buffer * buffer, char **datap, u_int len);
|
|
|
|
/* Returns the number of bytes of data in the buffer. */
|
|
u_int buffer_len(Buffer * buffer);
|
|
|
|
/* Gets data from the beginning of the buffer. */
|
|
void buffer_get(Buffer * buffer, char *buf, u_int len);
|
|
|
|
/* Consumes the given number of bytes from the beginning of the buffer. */
|
|
void buffer_consume(Buffer * buffer, u_int bytes);
|
|
|
|
/* Consumes the given number of bytes from the end of the buffer. */
|
|
void buffer_consume_end(Buffer * buffer, u_int bytes);
|
|
|
|
/* Returns a pointer to the first used byte in the buffer. */
|
|
char *buffer_ptr(Buffer * buffer);
|
|
|
|
/*
|
|
* Dumps the contents of the buffer to stderr in hex. This intended for
|
|
* debugging purposes only.
|
|
*/
|
|
void buffer_dump(Buffer * buffer);
|
|
|
|
#endif /* BUFFER_H */
|