diff options
Diffstat (limited to 'crypto/openssh/buffer.c')
| -rw-r--r-- | crypto/openssh/buffer.c | 174 |
1 files changed, 0 insertions, 174 deletions
diff --git a/crypto/openssh/buffer.c b/crypto/openssh/buffer.c deleted file mode 100644 index ad04b267e0d8..000000000000 --- a/crypto/openssh/buffer.c +++ /dev/null @@ -1,174 +0,0 @@ -/* - * Author: Tatu Ylonen <ylo@cs.hut.fi> - * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland - * All rights reserved - * Functions for manipulating fifo buffers (that can grow if needed). - * - * 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". - */ - -#include "includes.h" -RCSID("$OpenBSD: buffer.c,v 1.16 2002/06/26 08:54:18 markus Exp $"); - -#include "xmalloc.h" -#include "buffer.h" -#include "log.h" - -/* Initializes the buffer structure. */ - -void -buffer_init(Buffer *buffer) -{ - buffer->alloc = 4096; - buffer->buf = xmalloc(buffer->alloc); - buffer->offset = 0; - buffer->end = 0; -} - -/* Frees any memory used for the buffer. */ - -void -buffer_free(Buffer *buffer) -{ - memset(buffer->buf, 0, buffer->alloc); - xfree(buffer->buf); -} - -/* - * Clears any data from the buffer, making it empty. This does not actually - * zero the memory. - */ - -void -buffer_clear(Buffer *buffer) -{ - buffer->offset = 0; - buffer->end = 0; -} - -/* Appends data to the buffer, expanding it if necessary. */ - -void -buffer_append(Buffer *buffer, const void *data, u_int len) -{ - void *p; - p = buffer_append_space(buffer, len); - memcpy(p, data, 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, u_int len) -{ - void *p; - - if (len > 0x100000) - fatal("buffer_append_space: len %u not supported", len); - - /* If the buffer is empty, start using it from the beginning. */ - if (buffer->offset == buffer->end) { - buffer->offset = 0; - buffer->end = 0; - } -restart: - /* If there is enough space to store all data, store it now. */ - if (buffer->end + len < buffer->alloc) { - p = buffer->buf + buffer->end; - buffer->end += len; - return p; - } - /* - * If the buffer is quite empty, but all data is at the end, move the - * data to the beginning and retry. - */ - if (buffer->offset > buffer->alloc / 2) { - memmove(buffer->buf, buffer->buf + buffer->offset, - buffer->end - buffer->offset); - buffer->end -= buffer->offset; - buffer->offset = 0; - goto restart; - } - /* Increase the size of the buffer and retry. */ - buffer->alloc += len + 32768; - if (buffer->alloc > 0xa00000) - fatal("buffer_append_space: alloc %u not supported", - buffer->alloc); - buffer->buf = xrealloc(buffer->buf, buffer->alloc); - goto restart; - /* NOTREACHED */ -} - -/* Returns the number of bytes of data in the buffer. */ - -u_int -buffer_len(Buffer *buffer) -{ - return buffer->end - buffer->offset; -} - -/* Gets data from the beginning of the buffer. */ - -void -buffer_get(Buffer *buffer, void *buf, u_int len) -{ - if (len > buffer->end - buffer->offset) - fatal("buffer_get: trying to get more bytes %d than in buffer %d", - len, buffer->end - buffer->offset); - memcpy(buf, buffer->buf + buffer->offset, len); - buffer->offset += len; -} - -/* Consumes the given number of bytes from the beginning of the buffer. */ - -void -buffer_consume(Buffer *buffer, u_int bytes) -{ - if (bytes > buffer->end - buffer->offset) - fatal("buffer_consume: trying to get more bytes than in buffer"); - buffer->offset += bytes; -} - -/* Consumes the given number of bytes from the end of the buffer. */ - -void -buffer_consume_end(Buffer *buffer, u_int bytes) -{ - if (bytes > buffer->end - buffer->offset) - fatal("buffer_consume_end: trying to get more bytes than in buffer"); - buffer->end -= bytes; -} - -/* Returns a pointer to the first used byte in the buffer. */ - -void * -buffer_ptr(Buffer *buffer) -{ - return buffer->buf + buffer->offset; -} - -/* Dumps the contents of the buffer to stderr. */ - -void -buffer_dump(Buffer *buffer) -{ - int i; - u_char *ucp = buffer->buf; - - for (i = buffer->offset; i < buffer->end; i++) { - fprintf(stderr, "%02x", ucp[i]); - if ((i-buffer->offset)%16==15) - fprintf(stderr, "\r\n"); - else if ((i-buffer->offset)%2==1) - fprintf(stderr, " "); - } - fprintf(stderr, "\r\n"); -} |