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# tk.dlist

Interface to the C linked list type.
List is a complete package of functions to deal with singly linked lists of pointers or integers.

Features: 1. Uses mem package. 2. Has loop-back tests. 3. Each item in the list can have multiple predecessors, enabling different lists to 'share' a common tail.

Authors:
Walter Bright
License:
Boost License 1.0

Source: backend/tk/dlist.d

nothrow @nogc list_t `list_link`(list_t `list`);
  Create link to existing `list`, that is, share the `list` with somebody else.
  Returns:
  pointer to that `list` entry.
nothrow @nogc list_t `list_next`(list_t `list`);
  Returns:
  pointer to next entry in `list`.
nothrow @nogc list_t `list_prev`(list_t `start`, list_t `list`);
  Returns:
  pointer to previous item in `list`.
nothrow @nogc void* `list_ptr`(list_t `list`);
  Returns:
  ptr from `list` entry.
nothrow @nogc int `list_data`(list_t `list`);
  Returns:
  integer item from `list` entry.
nothrow @nogc void `list_appenddata`(list_t* `plist`, int `d`);
  Append integer item to list.
nothrow @nogc void `list_prependdata`(list_t* `plist`, int `d`);
  Prepend integer item to list.
nothrow @nogc void `list_init`();
  Initialize list package.

  Output: list_inited = 1

nothrow @nogc void `list_term`();
  Terminate list package.

  Output: list_inited = 0

nothrow @nogc void `list_free`(list_t* `plist`, list_free_fp `freeptr`);
  Free list.
  Parameters:

  list_t* `plist` | Pointer to list to free
  list_free_fp `freeptr` | Pointer to freeing function for the data pointer (use FPNULL if none)

  Output: *`plist` is `null`

nothrow @nogc void* `list_subtract`(list_t* `plist`, void* `ptr`);
  Remove `ptr` from the list pointed to by *`plist`.

  Output: *`plist` is updated to be the start of the new list

  Returns:
  `null` if *`plist` is `null` otherwise `ptr`
nothrow @nogc void* `list_pop`(list_t* `plist`);
  Remove first element in list pointed to by *`plist`.
  Returns:
  First element, `null` if *`plist` is `null`
nothrow @nogc list_t `list_append`(list_t* `plist`, void* `ptr`);
  Append `ptr` to *`plist`.
  Returns:
  pointer to list item created. `null` if out of memory
nothrow @nogc list_t `list_prepend`(list_t* `plist`, void* `ptr`);
  Prepend `ptr` to *`plist`.
  Returns:
  pointer to list item created (which is also the start of the list). `null` if out of memory
nothrow @nogc int `list_nitems`(list_t `list`);
  Count up and return number of items in `list`.
  Returns:
  # of entries in `list`
nothrow @nogc list_t `list_nth`(list_t `list`, int `n`);
  Returns:
  nth `list` entry in `list`.
nothrow @nogc list_t `list_last`(list_t `list`);
  Returns:
  last `list` entry in `list`.
nothrow @nogc list_t `list_copy`(list_t `list`);
  Copy a `list` and return it.
nothrow @nogc int `list_equal`(list_t `list1`, list_t `list2`);
  Compare two lists.
  Returns:
  If they have the same ptrs, return 1 else 0.
nothrow @nogc int `list_cmp`(list_t `list1`, list_t `list2`, int function(void*, void*) `fp`);
  Compare two lists using the comparison function `fp`. The comparison function is the same as used for qsort().
  Returns:
  If they compare equal, return 0 else value returned by `fp`.
nothrow @nogc list_t `list_inlist`(list_t `list`, void* `ptr`);
  Search for `ptr` in `list`.
  Returns:
  If found, return `list` entry that it is, else `null`.
nothrow @nogc list_t `list_cat`(list_t* `pl1`, list_t `l2`);
  Concatenate two lists (`l2` appended to l1).

  Output: *`pl1` updated to be start of concatenated list.

  Returns:
  *`pl1`
nothrow @nogc list_t `list_build`(void* `p`, ...);
  Build a list out of the `null`-terminated argument list.
  Returns:
  generated list
nothrow @nogc void `list_apply`(list_t* `plist`, void function(void*) `fp`);
  Apply a function `fp` to each member of a list.
nothrow @nogc list_t `list_reverse`(list_t);
  Reverse a list.
nothrow @nogc void `list_copyinto`(list_t, void*);
  Copy list of pointers into an array of pointers.
nothrow @nogc list_t `list_insert`(list_t*, void*, int `n`);
  Insert item into list at nth position.

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