Splitted SILC core library. Core library includes now only

[silc.git] / lib / silcutil / silcbufutil.h

diff --git a/lib/silcutil/silcbufutil.h b/lib/silcutil/silcbufutil.h
new file mode 100644 (file)
index 0000000..1525375
--- /dev/null
+++ b/lib/silcutil/silcbufutil.h
@@ -0,0 +1,105 @@
+/*
+
+  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
+
+#ifndef SILC_DEBUG             /* When we are not doing debugging we use
+                                  optimized inline buffer functions. */
+
+/* Clears and initialiazes the buffer to the state as if it was just
+   allocated by silc_buffer_alloc. */
+
+extern 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. */
+
+extern 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. */
+
+extern 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. */
+
+extern inline
+SilcBuffer silc_buffer_realloc(SilcBuffer sb, unsigned int newsize)
+{
+  SilcBuffer sb_new;
+
+  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 /* !SILC_DEBUG */
+
+/* Prototypes */
+#ifdef SILC_DEBUG
+void silc_buffer_clear(SilcBuffer sb);
+SilcBuffer silc_buffer_copy(SilcBuffer sb);
+SilcBuffer silc_buffer_clone(SilcBuffer sb);
+SilcBuffer silc_buffer_realloc(SilcBuffer sb, unsigned int newsize);
+#endif
+
+#endif