1 files changed, 66 insertions, 0 deletions
diff --git a/usr.bin/ssh/buffer.h b/usr.bin/ssh/buffer.h
new file mode 100644
index 00000000000..f2bdac29651
--- /dev/null
+++ b/usr.bin/ssh/buffer.h
@@ -0,0 +1,66 @@
+/*
+
+buffer.h
+
+Author: Tatu Ylonen <ylo@cs.hut.fi>
+
+Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
+                   All rights reserved
+
+Created: Sat Mar 18 04:12:25 1995 ylo
+
+Code for manipulating FIFO buffers.
+
+*/
+
+/* RCSID("$Id: buffer.h,v 1.1 1999/09/26 20:53:34 deraadt Exp $"); */
+
+#ifndef BUFFER_H
+#define BUFFER_H
+
+typedef struct
+{
+  char *buf;			/* Buffer for data. */
+  unsigned int alloc;		/* Number of bytes allocated for data. */
+  unsigned int offset;		/* Offset of first byte containing data. */
+  unsigned 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, unsigned 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, unsigned int len);
+
+/* Returns the number of bytes of data in the buffer. */
+unsigned int buffer_len(Buffer *buffer);
+
+/* Gets data from the beginning of the buffer. */
+void buffer_get(Buffer *buffer, char *buf, unsigned int len);
+
+/* Consumes the given number of bytes from the beginning of the buffer. */
+void buffer_consume(Buffer *buffer, unsigned int bytes);
+
+/* Consumes the given number of bytes from the end of the buffer. */
+void buffer_consume_end(Buffer *buffer, unsigned 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 */