+/* 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;
+}
+