libplot: A detailed listing
In the current release of GNU
libplot, any Plotter supports 97
distinct operations. A language binding for
necessarily includes 97 functions that correspond to these operations.
In the C binding, these 97 functions belong to the C API
(application programming interface). The name of each function begins
with the prefix "pl_" and ends with the suffix "_r". In the C++
binding, the 97 functions are implemented as public members of the
Plotter class. No prefix or suffix is used.
A language binding may also include functions for creating,
selecting, and deleting Plotters. For example, the C binding
includes the additional functions
pl_deletepl_r. See The C API.
The 97 functions that operate on a specified Plotter are divided into the four sets tabulated below.
Many functions come in two versions: integer and double precision
floating point. Internally,
libplot uses double precision
floating point. The integer versions are provided for backward
compatibility. If there are two versions of a function, the name of
the floating point version begins with the letter ‘f’.
Many functions come in both absolute and relative versions, also. The latter use relative coordinates (i.e., coordinates relative to the current position of the graphics cursor), and their names end in ‘rel’.
Currently, only a few of the 97 functions have meaningful return values.