Vendor import of OpenSSH.

1 files changed, 68 insertions, 0 deletions

diff --git a/crypto/openssh/buffer.h b/crypto/openssh/buffer.h
new file mode 100644
index 0000000..04efc25
--- /dev/null
+++ b/crypto/openssh/buffer.h
@@ -0,0 +1,68 @@
+/*
+ * 
+ * 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 1.3 1999/11/24 19:53:44 markus 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 */