Here are the classes, structs, unions and interfaces with brief descriptions:

C_CCP4IObj
C_CFileStruct
C_CMMFile	Construct to hold the information about a map file
C_CMMFile_Data	Data structure describing the blocks within the file holding the map array
C_CMMFile_Labels
C_CMMFile_Skew	Data structure describing an optional skew transformation of the map
C_CMMFile_Stats	Construct to hold various map statistics
C_CMMFile_Symop	Data structure describing the block of symmetry data within the file
C_IOConvMap
Cbathead
Cccp4_spacegroup_	Data structure of a space group descriptor
Cccp4_symop_	Kevin's symmetry operator
Cccp4array_base	Definition for the array pre-header
Cccp4array_base_
CCCP4PARSERARRAY	CCP4 Parser array Construct to hold the information about a parsed line
CCCP4PARSERTOKEN	CCP4 Parser token Construct to hold the information about a single token
CCOMPLEX	Contruct representing a complex number
Cerror_system
Cfloat_uint_uchar	Common data structure for floats, ints, and chars
CMNF
CMTZ
CMTZCOL
CMTZSET
CMTZXTAL
CPOLAR	Contruct representing a polar coordinate complex number
CSYMGRP