Function

Vipsslist_fold2

since: 8.0

Declaration [src] 

void*
vips_slist_fold2 (
  GSList* list,
  void* start,
  VipsSListFold2Fn fn,
  void* a,
  void* b
)

Description [src]

Fold over a slist, applying fn to each element.

Available since: 8.0

Parameters

list

Type: A list of guint8

A GSList

The data is owned by the caller of the function.
start

Type: void*

Initial value for the accumulator.

The argument can be NULL.
The data is owned by the caller of the function.
fn

Type: VipsSListFold2Fn

Function to apply to each list element.

a

Type: void*

User data.

The argument can be NULL.
The data is owned by the caller of the function.
b

Type: void*

User data.

The argument can be NULL.
The data is owned by the caller of the function.

Return value

Type: void*

NULL if fn returns NULL for all arguments, otherwise the first non-NULL value from fn.

The data is owned by the called function.
The return value can be NULL.