-/*
-
- silcbufutil.h
-
- Author: Pekka Riikonen <priikone@poseidon.pspt.fi>
-
- Copyright (C) 1997 - 2000 Pekka Riikonen
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
-*/
-
-#ifndef SILCBUFUTIL_H
-#define SILCBUFUTIL_H
-
-#include "silcbuffer.h"
-
-/* Clears and initialiazes the buffer to the state as if it was just
- allocated by silc_buffer_alloc. */
-
-static inline
-void silc_buffer_clear(SilcBuffer sb)
-{
- memset(sb->head, 0, sb->truelen);
- sb->data = sb->head;
- sb->tail = sb->head;
- sb->len = 0;
-}
-
-/* Generates copy of a SilcBuffer. This copies everything inside the
- currently valid data area, nothing more. Use silc_buffer_clone to
- copy entire buffer. */
-
-static inline
-SilcBuffer silc_buffer_copy(SilcBuffer sb)
-{
- SilcBuffer sb_new;
-
- sb_new = silc_buffer_alloc(sb->len);
- silc_buffer_pull_tail(sb_new, SILC_BUFFER_END(sb_new));
- silc_buffer_put(sb_new, sb->data, sb->len);
-
- return sb_new;
-}
-
-/* Clones SilcBuffer. This generates new SilcBuffer and copies
- everything from the source buffer. The result is exact clone of
- the original buffer. */
-
-static inline
-SilcBuffer silc_buffer_clone(SilcBuffer sb)
-{
- SilcBuffer sb_new;
-
- sb_new = silc_buffer_alloc(sb->truelen);
- silc_buffer_pull_tail(sb_new, SILC_BUFFER_END(sb_new));
- silc_buffer_put(sb_new, sb->head, sb->truelen);
- sb_new->data = sb_new->head + (sb->data - sb->head);
- sb_new->tail = sb_new->data + sb->len;
- sb_new->len = sb->len;
-
- return sb_new;
-}
-
-/* Reallocates buffer. Old data is saved into the new buffer. Returns
- new SilcBuffer pointer. The buffer is exact clone of the old one
- except that there is now more space at the end of buffer. */
-
-static inline
-SilcBuffer silc_buffer_realloc(SilcBuffer sb, uint32 newsize)
-{
- SilcBuffer sb_new;
-
- if (!sb)
- return silc_buffer_alloc(newsize);
-
- if (newsize <= sb->truelen)
- return sb;
-
- sb_new = silc_buffer_alloc(newsize);
- silc_buffer_pull_tail(sb_new, SILC_BUFFER_END(sb_new));
- silc_buffer_put(sb_new, sb->head, sb->truelen);
- sb_new->data = sb_new->head + (sb->data - sb->head);
- sb_new->tail = sb_new->data + sb->len;
- sb_new->len = sb->len;
-
- silc_buffer_free(sb);
-
- return sb_new;
-}
-
-#endif