Here is a list of all files with brief descriptions:

api_callback.cpp
api_colors.cpp
api_core.cpp
api_core.h
api_file.cpp
api_memory.cpp
api_string.cpp
api_translator.cpp
data_manager.cpp
data_manager.h
dataobject.cpp
dataobject.h
datetime.cpp
datetime.h
geo_classes.cpp
geo_functions.cpp
geo_tools.h
grid.cpp
grid.h
grid_io.cpp
grid_memory.cpp
grid_operation.cpp
grid_pyramid.cpp
grid_pyramid.h
grid_system.cpp
grids.cpp
grids.h
kdtree.cpp
mat_formula.cpp
mat_grid_radius.cpp
mat_indexing.cpp
mat_matrix.cpp
mat_mRMR.cpp
mat_regression.cpp
mat_regression_multiple.cpp
mat_regression_weighted.cpp
mat_spline.cpp
mat_tools.cpp
mat_tools.h
mat_trend.cpp
metadata.cpp
metadata.h
parameter.cpp
parameter_data.cpp
parameters.cpp
parameters.h
pointcloud.cpp
pointcloud.h
projections.cpp
quadtree.cpp
saga_api.cpp
saga_api.h
shape.cpp
shape_line.cpp
shape_part.cpp
shape_point.cpp
shape_points.cpp
shape_polygon.cpp
shapes.cpp
shapes.h
shapes_clipper.cpp
shapes_io.cpp
shapes_ogis.cpp
shapes_polygons.cpp
shapes_selection.cpp
table.cpp
table.h
table_dbase.cpp
table_dbase.h
table_io.cpp
table_record.cpp
table_selection.cpp
table_value.h
tin.cpp
tin.h
tin_elements.cpp
tin_triangulation.cpp
tool.cpp
tool.h
tool_chain.cpp
tool_chain.h
tool_grid.cpp
tool_grid_interactive.cpp
tool_interactive.cpp
tool_interactive_base.cpp
tool_library.cpp
tool_library.h
tool_library_interface.cpp
tool_summary.cpp