GNU General Public License for more details.
*/
+/* $Id$ */
+/* Optimized buffer managing routines. These are short inline functions. */
#ifndef SILCBUFFER_H
#define SILCBUFFER_H
the allocated data area. Following short description of the fields
of the buffer.
- unsigned int truelen;
+ uint32 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.
- unsigned int len;
+ uint32 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 SilcBufferStruct {
- unsigned int truelen;
- unsigned int len;
+typedef struct {
+ uint32 truelen;
+ uint32 len;
unsigned char *head;
unsigned char *data;
unsigned char *tail;
unsigned char *end;
-} SilcBufferObject;
-
-typedef SilcBufferObject *SilcBuffer;
+} *SilcBuffer, SilcBufferStruct;
/* Macros */
the buffer area to the end of the buffer. */
#define SILC_BUFFER_END(x) ((x)->end - (x)->head)
-#ifndef SILC_DEBUG /* When we are not doing debugging we use
- optimized inline buffer functions. */
-/*
- * Optimized buffer managing routines. These are short inline
- * functions.
- */
+/* Inline functions */
extern inline
-SilcBuffer silc_buffer_alloc(unsigned int len)
+SilcBuffer silc_buffer_alloc(uint32 len)
{
SilcBuffer sb;
- unsigned char *data;
/* Allocate new SilcBuffer */
- sb = silc_calloc(1, sizeof(*sb));
+ sb = (SilcBuffer)silc_calloc(1, sizeof(*sb));
/* Allocate the actual data area */
- data = silc_calloc(len, sizeof(*data));
+ sb->head = (unsigned char *)silc_calloc(len, sizeof(*sb->head));
/* Set pointers to the new buffer */
sb->truelen = len;
- sb->len = 0;
- sb->head = data;
- sb->data = data;
- sb->tail = data;
- sb->end = data + sb->truelen;
+ sb->data = sb->head;
+ sb->tail = sb->head;
+ sb->end = sb->head + sb->truelen;
return sb;
}
}
}
+/* Sets the `data' and `data_len' to the buffer pointer sent as argument.
+ The data area is automatically set to the `data_len'. This function
+ can be used to set the data to static buffer without needing any
+ memory allocations. The `data' will not be copied to the buffer. */
+
+extern inline
+void silc_buffer_set(SilcBuffer sb, unsigned char *data, uint32 data_len)
+{
+ sb->data = sb->head = data;
+ sb->tail = sb->end = data + data_len;
+ sb->len = sb->truelen = data_len;
+}
+
/* Pulls current data area towards end. The length of the currently
valid data area is also decremented. Returns pointer to the data
area before pulling.
*/
extern inline
-unsigned char *silc_buffer_pull(SilcBuffer sb, unsigned int len)
+unsigned char *silc_buffer_pull(SilcBuffer sb, uint32 len)
{
unsigned char *old_data = sb->data;
+#ifdef SILC_DEBUG
assert(len <= (sb->tail - sb->data));
+#endif
sb->data += len;
sb->len -= len;
*/
extern inline
-unsigned char *silc_buffer_push(SilcBuffer sb, unsigned int len)
+unsigned char *silc_buffer_push(SilcBuffer sb, uint32 len)
{
unsigned char *old_data = sb->data;
+#ifdef SILC_DEBUG
assert((sb->data - len) >= sb->head);
+#endif
sb->data -= len;
sb->len += len;
*/
extern inline
-unsigned char *silc_buffer_pull_tail(SilcBuffer sb, unsigned int len)
+unsigned char *silc_buffer_pull_tail(SilcBuffer sb, uint32 len)
{
unsigned char *old_tail = sb->tail;
+#ifdef SILC_DEBUG
assert((sb->end - sb->tail) >= len);
+#endif
sb->tail += len;
sb->len += len;
*/
extern inline
-unsigned char *silc_buffer_push_tail(SilcBuffer sb, unsigned int len)
+unsigned char *silc_buffer_push_tail(SilcBuffer sb, uint32 len)
{
unsigned char *old_tail = sb->tail;
+#ifdef SILC_DEBUG
assert((sb->tail - len) >= sb->data);
+#endif
sb->tail -= len;
sb->len -= len;
extern inline
unsigned char *silc_buffer_put_head(SilcBuffer sb,
unsigned char *data,
- unsigned int len)
+ uint32 len)
{
+#ifdef SILC_DEBUG
assert((sb->data - sb->head) >= len);
- return memcpy(sb->head, data, len);
+#endif
+ return (unsigned char *)memcpy(sb->head, data, len);
}
/* Puts data at the start of the valid data area. Returns a pointer
extern inline
unsigned char *silc_buffer_put(SilcBuffer sb,
unsigned char *data,
- unsigned int len)
+ uint32 len)
{
+#ifdef SILC_DEBUG
assert((sb->tail - sb->data) >= len);
- return memcpy(sb->data, data, len);
+#endif
+ return (unsigned char *)memcpy(sb->data, data, len);
}
/* Puts data at the tail of the buffer. Returns pointer to the copied
extern inline
unsigned char *silc_buffer_put_tail(SilcBuffer sb,
unsigned char *data,
- unsigned int len)
+ uint32 len)
{
- assert((sb->end - sb->tail) >= len);
- return memcpy(sb->tail, data, len);
-}
-
-#endif /* !SILC_DEBUG */
-
-/* Prototypes */
#ifdef SILC_DEBUG
-SilcBuffer silc_buffer_alloc(unsigned int len);
-void silc_buffer_free(SilcBuffer sb);
-unsigned char *silc_buffer_pull(SilcBuffer sb, unsigned int len);
-unsigned char *silc_buffer_push(SilcBuffer sb, unsigned int len);
-unsigned char *silc_buffer_pull_tail(SilcBuffer sb, unsigned int len);
-unsigned char *silc_buffer_push_tail(SilcBuffer sb, unsigned int len);
-unsigned char *silc_buffer_put_head(SilcBuffer sb,
- unsigned char *data,
- unsigned int len);
-unsigned char *silc_buffer_put(SilcBuffer sb,
- unsigned char *data,
- unsigned int len);
-unsigned char *silc_buffer_put_tail(SilcBuffer sb,
- unsigned char *data,
- unsigned int len);
+ assert((sb->end - sb->tail) >= len);
#endif
+ return (unsigned char *)memcpy(sb->tail, data, len);
+}
#endif
projects / silc.git / blobdiff