#### 3.2.6.11 Summary of Obstack Functions ¶

Here is a summary of all the functions associated with obstacks. Each takes the address of an obstack (`struct obstack *`) as its first argument.

`void obstack_init (struct obstack *obstack-ptr)`

  Initialize use of an obstack. See Creating Obstacks.

`void *obstack_alloc (struct obstack *obstack-ptr, int size)`

  Allocate an object of size uninitialized bytes. See Allocation in an Obstack.

`void *obstack_copy (struct obstack *obstack-ptr, void *address, int size)`

  Allocate an object of size bytes, with contents copied from address. See Allocation in an Obstack.

`void *obstack_copy0 (struct obstack *obstack-ptr, void *address, int size)`

  Allocate an object of size+1 bytes, with size of them copied from address, followed by a null character at the end. See Allocation in an Obstack.

`void obstack_free (struct obstack *obstack-ptr, void *object)`

  Free object (and everything allocated in the specified obstack more recently than object). See Freeing Objects in an Obstack.

`void obstack_blank (struct obstack *obstack-ptr, int size)`

  Add size uninitialized bytes to a growing object. See Growing Objects.

`void obstack_grow (struct obstack *obstack-ptr, void *address, int size)`

  Add size bytes, copied from address, to a growing object. See Growing Objects.

`void obstack_grow0 (struct obstack *obstack-ptr, void *address, int size)`

  Add size bytes, copied from address, to a growing object, and then add another byte containing a null character. See Growing Objects.

`void obstack_1grow (struct obstack *obstack-ptr, char data-char)`

  Add one byte containing data-char to a growing object. See Growing Objects.

`void *obstack_finish (struct obstack *obstack-ptr)`

  Finalize the object that is growing and return its permanent address. See Growing Objects.

`int obstack_object_size (struct obstack *obstack-ptr)`

  Get the current size of the currently growing object. See Growing Objects.

`void obstack_blank_fast (struct obstack *obstack-ptr, int size)`

  Add size uninitialized bytes to a growing object without checking that there is enough room. See Extra Fast Growing Objects.

`void obstack_1grow_fast (struct obstack *obstack-ptr, char data-char)`

  Add one byte containing data-char to a growing object without checking that there is enough room. See Extra Fast Growing Objects.

`int obstack_room (struct obstack *obstack-ptr)`

  Get the amount of room now available for growing the current object. See Extra Fast Growing Objects.

`int obstack_alignment_mask (struct obstack *obstack-ptr)`

  The mask used for aligning the beginning of an object. This is an lvalue. See Alignment of Data in Obstacks.

`int obstack_chunk_size (struct obstack *obstack-ptr)`

  The size for allocating chunks. This is an lvalue. See Obstack Chunks.

`void *obstack_base (struct obstack *obstack-ptr)`

  Tentative starting address of the currently growing object. See Status of an Obstack.

`void *obstack_next_free (struct obstack *obstack-ptr)`

  Address just after the end of the currently growing object. See Status of an Obstack.