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| author | marha <marha@users.sourceforge.net> | 2011-04-30 15:25:48 +0000 |
|---|---|---|
| committer | marha <marha@users.sourceforge.net> | 2011-04-30 15:25:48 +0000 |
| commit | 0402d388cb9803652c0f9a52ba7dcb6029fdd0b9 (patch) | |
| tree | afd1b68edb9a74d5c87e63ea72d04b8301705d82 /mesalib/src/gallium/auxiliary/util/u_dynarray.h | |
| parent | c4ae0bb951bfb6061e7f0c492ba03de330137515 (diff) | |
| download | vcxsrv-0402d388cb9803652c0f9a52ba7dcb6029fdd0b9.tar.gz vcxsrv-0402d388cb9803652c0f9a52ba7dcb6029fdd0b9.tar.bz2 vcxsrv-0402d388cb9803652c0f9a52ba7dcb6029fdd0b9.zip | |
Added extra needed files
Diffstat (limited to 'mesalib/src/gallium/auxiliary/util/u_dynarray.h')
| -rw-r--r-- | mesalib/src/gallium/auxiliary/util/u_dynarray.h | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/mesalib/src/gallium/auxiliary/util/u_dynarray.h b/mesalib/src/gallium/auxiliary/util/u_dynarray.h new file mode 100644 index 000000000..4dd6c3eaa --- /dev/null +++ b/mesalib/src/gallium/auxiliary/util/u_dynarray.h @@ -0,0 +1,114 @@ +/**************************************************************************
+ *
+ * Copyright 2010 Luca Barbieri
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial
+ * portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+
+#ifndef U_DYNARRAY_H
+#define U_DYNARRAY_H
+
+#include "pipe/p_compiler.h"
+#include "util/u_memory.h"
+
+/* A zero-initialized version of this is guaranteed to represent an
+ * empty array.
+ *
+ * Also, size <= capacity and data != 0 if and only if capacity != 0
+ * capacity will always be the allocation size of data
+ */
+struct util_dynarray
+{
+ void *data;
+ unsigned size;
+ unsigned capacity;
+};
+
+static INLINE void
+util_dynarray_init(struct util_dynarray *buf)
+{
+ memset(buf, 0, sizeof(*buf));
+}
+
+static INLINE void
+util_dynarray_fini(struct util_dynarray *buf)
+{
+ if(buf->data)
+ {
+ FREE(buf->data);
+ util_dynarray_init(buf);
+ }
+}
+
+/* use util_dynarray_trim to reduce the allocated storage */
+static INLINE void *
+util_dynarray_resize(struct util_dynarray *buf, unsigned newsize)
+{
+ char *p;
+ if(newsize > buf->capacity)
+ {
+ unsigned newcap = buf->capacity << 1;
+ if(newsize > newcap)
+ newcap = newsize;
+ buf->data = REALLOC(buf->data, buf->capacity, newcap);
+ buf->capacity = newcap;
+ }
+
+ p = (char *)buf->data + buf->size;
+ buf->size = newsize;
+ return p;
+}
+
+static INLINE void *
+util_dynarray_grow(struct util_dynarray *buf, int diff)
+{
+ return util_dynarray_resize(buf, buf->size + diff);
+}
+
+static INLINE void
+util_dynarray_trim(struct util_dynarray *buf)
+{
+ if (buf->size != buf->capacity) {
+ if (buf->size) {
+ buf->data = REALLOC(buf->data, buf->capacity, buf->size);
+ buf->capacity = buf->size;
+ }
+ else {
+ FREE(buf->data);
+ buf->data = 0;
+ buf->capacity = 0;
+ }
+ }
+}
+
+#define util_dynarray_append(buf, type, v) do {type __v = (v); memcpy(util_dynarray_grow((buf), sizeof(type)), &__v, sizeof(type));} while(0)
+#define util_dynarray_top_ptr(buf, type) (type*)((char*)(buf)->data + (buf)->size - sizeof(type))
+#define util_dynarray_top(buf, type) *util_dynarray_top_ptr(buf, type)
+#define util_dynarray_pop_ptr(buf, type) (type*)((char*)(buf)->data + ((buf)->size -= sizeof(type)))
+#define util_dynarray_pop(buf, type) *util_dynarray_pop_ptr(buf, type)
+#define util_dynarray_contains(buf, type) ((buf)->size >= sizeof(type))
+#define util_dynarray_element(buf, type, idx) ((type*)(buf)->data + (idx))
+#define util_dynarray_begin(buf) ((buf)->data)
+#define util_dynarray_end(buf) ((void*)util_dynarray_element((buf), char, (buf)->size))
+
+#endif /* U_DYNARRAY_H */
+
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