/*
- silcbuffer.h
+ silcbuffer.h
- Author: Pekka Riikonen <priikone@poseidon.pspt.fi>
+ Author: Pekka Riikonen <priikone@silcnet.org>
- Copyright (C) 1998 - 2000 Pekka Riikonen
+ Copyright (C) 1998 - 2002 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.
-
+ the Free Software Foundation; version 2 of the License.
+
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
the allocated data area. Following short description of the fields
of the buffer.
- uint32 truelen;
+ SilcUInt32 truelen;
True length of the buffer. This is set at the allocation of the
buffer and it should not be touched after that. This field should
be considered read-only.
- uint32 len;
+ SilcUInt32 len;
Length of the currently valid data area. Tells the length of the
data at the buffer. This is set to zero at the allocation of the
*/
typedef struct {
- uint32 truelen;
- uint32 len;
+ SilcUInt32 truelen;
+ SilcUInt32 len;
unsigned char *head;
unsigned char *data;
unsigned char *tail;
/* Inline functions */
static inline
-SilcBuffer silc_buffer_alloc(uint32 len)
+SilcBuffer silc_buffer_alloc(SilcUInt32 len)
{
SilcBuffer sb;
memory allocations. The `data' will not be copied to the buffer. */
static inline
-void silc_buffer_set(SilcBuffer sb, unsigned char *data, uint32 data_len)
+void silc_buffer_set(SilcBuffer sb, unsigned char *data, SilcUInt32 data_len)
{
sb->data = sb->head = data;
sb->tail = sb->end = data + data_len;
*/
static inline
-unsigned char *silc_buffer_pull(SilcBuffer sb, uint32 len)
+unsigned char *silc_buffer_pull(SilcBuffer sb, SilcUInt32 len)
{
unsigned char *old_data = sb->data;
#ifdef SILC_DEBUG
- assert(len <= (uint32)(sb->tail - sb->data));
+ assert(len <= (SilcUInt32)(sb->tail - sb->data));
#endif
sb->data += len;
*/
static inline
-unsigned char *silc_buffer_push(SilcBuffer sb, uint32 len)
+unsigned char *silc_buffer_push(SilcBuffer sb, SilcUInt32 len)
{
unsigned char *old_data = sb->data;
*/
static inline
-unsigned char *silc_buffer_pull_tail(SilcBuffer sb, uint32 len)
+unsigned char *silc_buffer_pull_tail(SilcBuffer sb, SilcUInt32 len)
{
unsigned char *old_tail = sb->tail;
#ifdef SILC_DEBUG
- assert((uint32)(sb->end - sb->tail) >= len);
+ assert((SilcUInt32)(sb->end - sb->tail) >= len);
#endif
sb->tail += len;
*/
static inline
-unsigned char *silc_buffer_push_tail(SilcBuffer sb, uint32 len)
+unsigned char *silc_buffer_push_tail(SilcBuffer sb, SilcUInt32 len)
{
unsigned char *old_tail = sb->tail;
static inline
unsigned char *silc_buffer_put_head(SilcBuffer sb,
const unsigned char *data,
- uint32 len)
+ SilcUInt32 len)
{
#ifdef SILC_DEBUG
- assert((uint32)(sb->data - sb->head) >= len);
+ assert((SilcUInt32)(sb->data - sb->head) >= len);
#endif
return (unsigned char *)memcpy(sb->head, data, len);
}
static inline
unsigned char *silc_buffer_put(SilcBuffer sb,
const unsigned char *data,
- uint32 len)
+ SilcUInt32 len)
{
#ifdef SILC_DEBUG
- assert((uint32)(sb->tail - sb->data) >= len);
+ assert((SilcUInt32)(sb->tail - sb->data) >= len);
#endif
return (unsigned char *)memcpy(sb->data, data, len);
}
static inline
unsigned char *silc_buffer_put_tail(SilcBuffer sb,
const unsigned char *data,
- uint32 len)
+ SilcUInt32 len)
{
#ifdef SILC_DEBUG
- assert((uint32)(sb->end - sb->tail) >= len);
+ assert((SilcUInt32)(sb->end - sb->tail) >= len);
#endif
return (unsigned char *)memcpy(sb->tail, data, len);
}
+/* 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, SilcUInt32 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
projects / silc.git / blobdiff