summaryrefslogtreecommitdiffstats
path: root/libdimension/dimension
diff options
context:
space:
mode:
authorTavian Barnes <tavianator@gmail.com>2009-07-09 21:03:16 +0000
committerTavian Barnes <tavianator@gmail.com>2009-07-09 21:03:16 +0000
commita64f9e671936451d7a3a60191dcca6e37e97e585 (patch)
treef95182c1fc24b972bd4a7dd5dae4ba6a7175de83 /libdimension/dimension
parent9a634a53f0d7135ef82e6888a89091db173c7f7f (diff)
downloaddimension-a64f9e671936451d7a3a60191dcca6e37e97e585.tar.xz
Implement removing/inserting in the middle of a dmnsn_array*.
Diffstat (limited to 'libdimension/dimension')
-rw-r--r--libdimension/dimension/array.h28
1 files changed, 28 insertions, 0 deletions
diff --git a/libdimension/dimension/array.h b/libdimension/dimension/array.h
index c12ff9f..d835d60 100644
--- a/libdimension/dimension/array.h
+++ b/libdimension/dimension/array.h
@@ -139,4 +139,32 @@ dmnsn_array_pop(dmnsn_array *array, void *obj)
dmnsn_array_resize(array, size - 1); /* Shrink the array */
}
+/* Insert an item into the middle of the array */
+DMNSN_INLINE void
+dmnsn_array_insert(dmnsn_array *array, size_t i, const void *obj)
+{
+ size_t size = dmnsn_array_size(array);
+ /* Increase the size by 1 */
+ dmnsn_array_resize(array, size + 1);
+ /* Move the elements at and after `i' 1 to the right */
+ memmove((char *)array->ptr + array->obj_size*(i + 1),
+ (char *)array->ptr + array->obj_size*i,
+ array->obj_size*(size - i));
+ /* Insert `obj' at `i' */
+ memcpy((char *)array->ptr + array->obj_size*i, obj, array->obj_size);
+}
+
+/* Remove an item from the middle of the array */
+DMNSN_INLINE void
+dmnsn_array_remove(dmnsn_array *array, size_t i)
+{
+ size_t size = dmnsn_array_size(array);
+ /* Move the array elements after `i' 1 to the left */
+ memmove((char *)array->ptr + array->obj_size*i,
+ (char *)array->ptr + array->obj_size*(i + 1),
+ array->obj_size*(size - i));
+ /* Decrease the size by 1 */
+ dmnsn_array_resize(array, size - 1);
+}
+
#endif /* DIMENSION_ARRAY_H */