Function chunk related functions

// Get a function chunk attribute
//       ea     - any address in the chunk
//       attr   - one of: FUNCATTR_START, FUNCATTR_END
//                        FUNCATTR_OWNER, FUNCATTR_REFQTY
// returns: desired attribute or -1

long get_fchunk_attr(long ea, long attr);

// Set a function chunk attribute
//       ea     - any address in the chunk
//       attr   - nothing defined yet
//       value  - desired bg color (RGB)
// returns: 0 if failed, 1 if success

success set_fchunk_attr(long ea, long attr, long value);

// Get a function chunk referer
//       ea     - any address in the chunk
//       idx    - referer index (0..get_fchunk_attr(FUNCATTR_REFQTY))
// returns: referer address or BADADDR

long get_fchunk_referer(long ea, long idx);

// Get next function chunk
//       ea     - any address
// returns: the starting address of the next
//          function chunk or BADADDR
// This function enumerates all chunks of all functions in the database

long get_next_fchunk(long ea);

// Get previous function chunk
//       ea     - any address
// returns: the starting address of the previous
//          function chunk or BADADDR
// This function enumerates all chunks of all functions in the database

long get_prev_fchunk(long ea);

// Append a function chunk to the function
//       funcea   - any address in the function
//       ea1, ea2 - boundaries of a function tail to add.
//                  If a chunk exists at the specified addresses,
//                  it must have exactly the specified boundaries
// returns: 0 if failed, 1 if success

success append_func_tail(long funcea, long ea1, long ea2);

// Remove a function chunk from the function
//       funcea - any address in the function
//       ea1    - any address in the function chunk to remove
// returns: 0 if failed, 1 if success

success remove_fchunk(long funcea, long tailea);

// Change the function chunk owner
//       tailea - any address in the function chunk
//       funcea - the starting address of the new owner
// returns: 0 if failed, 1 if success
// The new owner must already have the chunk appended before the call

success set_tail_owner(long tailea, long funcea);

// Get the first function chunk of the specified function
//       funcea - any address in the function
// returns: the function entry point or BADADDR
// This function returns the first (main) chunk of the specified function

long first_func_chunk(long funcea);

// Get the next function chunk of the specified function
//         arguments:      funcea - any address in the function
//                         tailea - any address in the current chunk
//         returns:        the starting address of the next
//                         function chunk or BADADDR
// This function returns the next chunk of the specified function

long next_func_chunk(long funcea, long tailea);