EmbedThis

Appearance

List ​

The RList module is a simple growable list suitable for storing simple primitive data values or pointers to arbitrary objects.

API Tour ​

To create a list:

c
#include "r.h"

RList *list = rAllocList(initialSize, flags);

Lists can be created so that when the list is freed, each of the list items will also be freed. If the flags are set to R_DYNAMIC_VALUE, then rFree() will be called on each list item when the list is freed. If the flags are set to R_STATIC_VALUE (the default), then list items will not be freed.

To free a list:

c
rFreeList(list);

To add an item to the end of the list:

c
rAddItem(list, myObject);

To clear the list:

c
rClearList(list);

To get the number of items in the list:

c
ssize length = rGetListLength(list);

To iterate over items in a list:

c
void *item;
int index;
for (ITERATE_ITEMS(list, item, index)) {
    //  Process item
}

ITERATE_ITEMS is defined as:

c
#define ITERATE_ITEMS(list, item, index) \
    index = 0; \
    list && index < list->length && ((item = list->items[index]) || 1); \
    index++

To get an item from the list at a specific index position:

c
int index = 4;
rGetItem(list, index);

To insert an item at a specific position. This will insert myObject at index 4.

c
rInserItemAt(list, 4, myObject);

To remove an item:

c
rRemoveItem(list, myObject);

//  or remove at an Index
rRemoveItemAt(list, 4);

To grow a list:

c
rGrowList(list, 1000);

To push and pop items:

c
rPushItem(list, item);
item = rPopItem(list);

API Reference ​

The full API is specified here:

List API